syzbot

map[DenialOfService:false Explanation:I have carefully analyzed the provided kernel bug report, the syzkaller
reproducer, and the relevant source code in `net/mac80211/tdls.c` and
`net/wireless/nl80211.c`.

### Bug Analysis
The bug is a `WARN_ON_ONCE` triggered in the function
`ieee80211_tdls_add_setup_cfm_ies()` located in `net/mac80211/tdls.c`.

```c
sta = sta_info_get(sdata, peer);
ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);

if (WARN_ON_ONCE(!sta || !ap_sta))
    return;
```

This warning occurs when the kernel attempts to construct a TDLS (Tunneled
Direct Link Setup) Setup Confirm frame, but it cannot find the station
information (`sta_info`) for either the target peer or the associated Access
Point (AP).

### Reachability and Privileges
The function `ieee80211_tdls_add_setup_cfm_ies()` is reachable via the
`NL80211_CMD_TDLS_MGMT` netlink command when the action code is set to
`WLAN_TDLS_SETUP_CONFIRM`.

Looking at the netlink command registration in `net/wireless/nl80211.c`:
```c
{
    .cmd = NL80211_CMD_TDLS_MGMT,
    .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
    .doit = nl80211_tdls_mgmt,
    .flags = GENL_UNS_ADMIN_PERM,
}
```
The `GENL_UNS_ADMIN_PERM` flag indicates that this command requires
`CAP_NET_ADMIN` privileges within the user namespace that owns the network
namespace. Therefore, an unprivileged user cannot trigger this bug in the
initial namespace, but they can trigger it if they create a new user and network
namespace (e.g., using `unshare -un`).

### Remote Triggerability
There is no path to trigger this warning remotely. TDLS management frames
received over the air are passed up to userspace (e.g., `wpa_supplicant`) for
processing. The kernel does not automatically generate TDLS Setup Confirm frames
in response to remote traffic. The only way to reach this code path is via the
local `NL80211_CMD_TDLS_MGMT` netlink command.

### Security Impact
*   **Exploitable**: **False**. The bug is a simple state validation check. If
the required station information is missing, the code emits a warning and safely
returns early (`return;`). There is no memory corruption, use-after-free,
out-of-bounds access, or uninitialized memory usage.
*   **Denial of Service**: **False**. The `WARN_ON_ONCE` macro ensures that the
warning is only printed once per boot, preventing log flooding. It does not
crash the system or cause deadlocks. Even if the system is configured with
`panic_on_warn=1`, the requirement for `CAP_NET_ADMIN` (even in a user
namespace) significantly lowers the severity, as the attacker is only affecting
their own isolated environment or requires privileges to affect the host.

### Conclusion
This is a benign warning caused by a lack of state validation in the
`NL80211_CMD_TDLS_MGMT` handler before attempting to build a specific TDLS
frame. It is not exploitable and does not pose a significant security risk. Exploitable:false FilesystemTrigger:false NetworkTrigger:false PeripheralTrigger:false RemoteTrigger:false Unprivileged:false UserNamespace:true VMGuestTrigger:false VMHostTrigger:false]

map[SimplifiedCRepro:// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE 

#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <net/if.h>
#include <netinet/in.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/in6.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/nl80211.h>
#include <linux/rtnetlink.h>
#include <linux/veth.h>

struct nlmsg {
	char* pos;
	int nesting;
	struct nlattr* nested[8];
	char buf[4096];
};

static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
			 const void* data, int size)
{
	memset(nlmsg, 0, sizeof(*nlmsg));
	struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
	hdr->nlmsg_type = typ;
	hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
	memcpy(hdr + 1, data, size);
	nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}

static void netlink_attr(struct nlmsg* nlmsg, int typ,
			 const void* data, int size)
{
	struct nlattr* attr = (struct nlattr*)nlmsg->pos;
	attr->nla_len = sizeof(*attr) + size;
	attr->nla_type = typ;
	if (size > 0)
		memcpy(attr + 1, data, size);
	nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}

static int netlink_send_ext(struct nlmsg* nlmsg, int sock,
			    uint16_t reply_type, int* reply_len, bool dofail)
{
	if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
	exit(1);
	struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
	hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
	struct sockaddr_nl addr;
	memset(&addr, 0, sizeof(addr));
	addr.nl_family = AF_NETLINK;
	ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr));
	if (n != (ssize_t)hdr->nlmsg_len) {
		if (dofail)
	exit(1);
		return -1;
	}
	n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
	if (reply_len)
		*reply_len = 0;
	if (n < 0) {
		if (dofail)
	exit(1);
		return -1;
	}
	if (n < (ssize_t)sizeof(struct nlmsghdr)) {
		errno = EINVAL;
		if (dofail)
	exit(1);
		return -1;
	}
	if (hdr->nlmsg_type == NLMSG_DONE)
		return 0;
	if (reply_len && hdr->nlmsg_type == reply_type) {
		*reply_len = n;
		return 0;
	}
	if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
		errno = EINVAL;
		if (dofail)
	exit(1);
		return -1;
	}
	if (hdr->nlmsg_type != NLMSG_ERROR) {
		errno = EINVAL;
		if (dofail)
	exit(1);
		return -1;
	}
	errno = -((struct nlmsgerr*)(hdr + 1))->error;
	return -errno;
}

static int netlink_query_family_id(struct nlmsg* nlmsg, int sock, const char* family_name, bool dofail)
{
	struct genlmsghdr genlhdr;
	memset(&genlhdr, 0, sizeof(genlhdr));
	genlhdr.cmd = CTRL_CMD_GETFAMILY;
	netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
	netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name, strnlen(family_name, GENL_NAMSIZ - 1) + 1);
	int n = 0;
	int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
	if (err < 0) {
		return -1;
	}
	uint16_t id = 0;
	struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN + NLMSG_ALIGN(sizeof(genlhdr)));
	for (; (char*)attr < nlmsg->buf + n; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
		if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
			id = *(uint16_t*)(attr + 1);
			break;
		}
	}
	if (!id) {
		errno = EINVAL;
		return -1;
	}
	recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
	return id;
}

#define WIFI_INITIAL_DEVICE_COUNT 2
#define WIFI_MAC_BASE { 0x08, 0x02, 0x11, 0x00, 0x00, 0x00}
#define WIFI_IBSS_BSSID { 0x50, 0x50, 0x50, 0x50, 0x50, 0x50}
#define WIFI_IBSS_SSID { 0x10, 0x10, 0x10, 0x10, 0x10, 0x10}
#define WIFI_DEFAULT_FREQUENCY 2412
#define WIFI_DEFAULT_SIGNAL 0
#define WIFI_DEFAULT_RX_RATE 1
#define HWSIM_CMD_REGISTER 1
#define HWSIM_CMD_FRAME 2
#define HWSIM_CMD_NEW_RADIO 4
#define HWSIM_ATTR_SUPPORT_P2P_DEVICE 14
#define HWSIM_ATTR_PERM_ADDR 22

static long syz_genetlink_get_family_id(volatile long name, volatile long sock_arg)
{
	int fd = sock_arg;
	if (fd < 0) {
		fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
		if (fd == -1) {
			return -1;
		}
	}
	struct nlmsg nlmsg_tmp;
	int ret = netlink_query_family_id(&nlmsg_tmp, fd, (char*)name, false);
	if ((int)sock_arg < 0)
		close(fd);
	if (ret < 0) {
		return -1;
	}
	return ret;
}

#define HWSIM_ATTR_RX_RATE 5
#define HWSIM_ATTR_SIGNAL 6
#define HWSIM_ATTR_ADDR_RECEIVER 1
#define HWSIM_ATTR_FRAME 3

#define WIFI_MAX_INJECT_LEN 2048

static int hwsim_register_socket(struct nlmsg* nlmsg, int sock, int hwsim_family)
{
	struct genlmsghdr genlhdr;
	memset(&genlhdr, 0, sizeof(genlhdr));
	genlhdr.cmd = HWSIM_CMD_REGISTER;
	netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr));
	int err = netlink_send_ext(nlmsg, sock, 0, NULL, false);
	if (err < 0) {
	}
	return err;
}

static int hwsim_inject_frame(struct nlmsg* nlmsg, int sock, int hwsim_family, uint8_t* mac_addr, uint8_t* data, int len)
{
	struct genlmsghdr genlhdr;
	uint32_t rx_rate = WIFI_DEFAULT_RX_RATE;
	uint32_t signal = WIFI_DEFAULT_SIGNAL;
	memset(&genlhdr, 0, sizeof(genlhdr));
	genlhdr.cmd = HWSIM_CMD_FRAME;
	netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr));
	netlink_attr(nlmsg, HWSIM_ATTR_RX_RATE, &rx_rate, sizeof(rx_rate));
	netlink_attr(nlmsg, HWSIM_ATTR_SIGNAL, &signal, sizeof(signal));
	netlink_attr(nlmsg, HWSIM_ATTR_ADDR_RECEIVER, mac_addr, ETH_ALEN);
	netlink_attr(nlmsg, HWSIM_ATTR_FRAME, data, len);
	int err = netlink_send_ext(nlmsg, sock, 0, NULL, false);
	if (err < 0) {
	}
	return err;
}

static long syz_80211_inject_frame(volatile long a0, volatile long a1, volatile long a2)
{
	uint8_t* mac_addr = (uint8_t*)a0;
	uint8_t* buf = (uint8_t*)a1;
	int buf_len = (int)a2;
	struct nlmsg tmp_msg;
	if (buf_len < 0 || buf_len > WIFI_MAX_INJECT_LEN) {
		return -1;
	}
	int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
	if (sock < 0) {
		return -1;
	}
	int hwsim_family_id = netlink_query_family_id(&tmp_msg, sock, "MAC80211_HWSIM", false);
	if (hwsim_family_id < 0) {
		close(sock);
		return -1;
	}
	int ret = hwsim_register_socket(&tmp_msg, sock, hwsim_family_id);
	if (ret < 0) {
		close(sock);
		return -1;
	}
	ret = hwsim_inject_frame(&tmp_msg, sock, hwsim_family_id, mac_addr, buf, buf_len);
	close(sock);
	if (ret < 0) {
		return -1;
	}
	return 0;
}

uint64_t r[9] = {0xffffffffffffffff, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
		syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul);
	syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul);
	syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul);
	const char* reason;
	(void)reason;
				intptr_t res = 0;
	if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {}
//  socket$nl_generic arguments: [
//    domain: const = 0x10 (8 bytes)
//    type: const = 0x3 (8 bytes)
//    proto: const = 0x10 (4 bytes)
//  ]
//  returns sock_nl_generic
	res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
	if (res != -1)
		r[0] = res;
//  syz_genetlink_get_family_id$nl80211 arguments: [
//    name: ptr[in, buffer] {
//      buffer: {6e 6c 38 30 32 31 31 00} (length 0x8)
//    }
//    fd: sock_nl_generic (resource)
//  ]
//  returns nl80211_family_id
memcpy((void*)0x200000000080, "nl80211\000", 8);
	res = -1;
res = syz_genetlink_get_family_id(/*name=*/0x200000000080, /*fd=*/-1);
	if (res != -1)
		r[1] = res;
//  ioctl$sock_SIOCGIFINDEX_80211 arguments: [
//    fd: sock (resource)
//    cmd: const = 0x8933 (4 bytes)
//    arg: ptr[out, ifreq_dev_t[nl80211_devnames, nl80211_ifindex]] {
//      ifreq_dev_t[nl80211_devnames, nl80211_ifindex] {
//        ifr_ifrn: buffer: {77 6c 61 6e 31 00 00 00 00 00 00 00 00 00 00 00} (length 0x10)
//        elem: nl80211_ifindex (resource)
//        pad = 0x0 (20 bytes)
//      }
//    }
//  ]
memcpy((void*)0x2000000000c0, "wlan1\000\000\000\000\000\000\000\000\000\000\000", 16);
	res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933, /*arg=*/0x2000000000c0ul);
	if (res != -1)
r[2] = *(uint32_t*)0x2000000000d0;
//  sendmsg$NL80211_CMD_SET_INTERFACE arguments: [
//    fd: sock_nl_generic (resource)
//    msg: ptr[in, msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]]] {
//      msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]] {
//        addr: nil
//        addrlen: len = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//        vec: ptr[in, iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]]] {
//          iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]] {
//            addr: ptr[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]] {
//              netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface] {
//                len: len = 0x24 (4 bytes)
//                type: nl80211_family_id (resource)
//                flags: netlink_msg_flags = 0x5 (2 bytes)
//                seq: int32 = 0x0 (4 bytes)
//                pid: int32 = 0x0 (4 bytes)
//                payload: msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload] {
//                  genl_hdr: genlmsghdr_t[NL80211_CMD_SET_INTERFACE] {
//                    cmd: const = 0x6 (1 bytes)
//                    version: const = 0x0 (1 bytes)
//                    reserved: const = 0x0 (2 bytes)
//                  }
//                  payload: nl80211_wdev_payload {
//                    NL80211_ATTR_IFINDEX: union optional[nlattr[NL80211_ATTR_IFINDEX, nl80211_ifindex]] {
//                      val: nlattr_t[const[NL80211_ATTR_IFINDEX, int16], nl80211_ifindex] {
//                        nla_len: offsetof = 0x8 (2 bytes)
//                        nla_type: const = 0x3 (2 bytes)
//                        payload: nl80211_ifindex (resource)
//                        size: buffer: {} (length 0x0)
//                      }
//                    }
//                    NL80211_ATTR_WDEV: union optional[nlattr[NL80211_ATTR_WDEV, nl80211_wdev]] {
//                      void: buffer: {} (length 0x0)
//                    }
//                  }
//                }
//                attrs: array[nl80211_policy$set_interface] {
//                  union nl80211_policy$set_interface {
//                    NL80211_ATTR_IFTYPE: nlattr_t[const[NL80211_ATTR_IFTYPE, int16], flags[nl80211_iftype, int32]] {
//                      nla_len: offsetof = 0x8 (2 bytes)
//                      nla_type: const = 0x5 (2 bytes)
//                      payload: nl80211_iftype = 0x2 (4 bytes)
//                      size: buffer: {} (length 0x0)
//                    }
//                  }
//                }
//              }
//            }
//            len: len = 0x24 (8 bytes)
//          }
//        }
//        vlen: const = 0x1 (8 bytes)
//        ctrl: const = 0x0 (8 bytes)
//        ctrllen: const = 0x0 (8 bytes)
//        f: send_flags = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//      }
//    }
//    f: send_flags = 0x0 (8 bytes)
//  ]
*(uint64_t*)0x200000000100 = 0;
*(uint32_t*)0x200000000108 = 0;
*(uint64_t*)0x200000000110 = 0x200000000140;
*(uint64_t*)0x200000000140 = 0x200000000180;
*(uint32_t*)0x200000000180 = 0x24;
*(uint16_t*)0x200000000184 = r[1];
*(uint16_t*)0x200000000186 = 5;
*(uint32_t*)0x200000000188 = 0;
*(uint32_t*)0x20000000018c = 0;
*(uint8_t*)0x200000000190 = 6;
*(uint8_t*)0x200000000191 = 0;
*(uint16_t*)0x200000000192 = 0;
*(uint16_t*)0x200000000194 = 8;
*(uint16_t*)0x200000000196 = 3;
*(uint32_t*)0x200000000198 = r[2];
*(uint16_t*)0x20000000019c = 8;
*(uint16_t*)0x20000000019e = 5;
*(uint32_t*)0x2000000001a0 = 2;
*(uint64_t*)0x200000000148 = 0x24;
*(uint64_t*)0x200000000118 = 1;
*(uint64_t*)0x200000000120 = 0;
*(uint64_t*)0x200000000128 = 0;
*(uint32_t*)0x200000000130 = 0;
	syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000100ul, /*f=*/0ul);
//  socket$nl_generic arguments: [
//    domain: const = 0x10 (8 bytes)
//    type: const = 0x3 (8 bytes)
//    proto: const = 0x10 (4 bytes)
//  ]
//  returns sock_nl_generic
	res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
	if (res != -1)
		r[3] = res;
//  syz_genetlink_get_family_id$nl80211 arguments: [
//    name: ptr[in, buffer] {
//      buffer: {6e 6c 38 30 32 31 31 00} (length 0x8)
//    }
//    fd: sock_nl_generic (resource)
//  ]
//  returns nl80211_family_id
memcpy((void*)0x200000000080, "nl80211\000", 8);
	res = -1;
res = syz_genetlink_get_family_id(/*name=*/0x200000000080, /*fd=*/-1);
	if (res != -1)
		r[4] = res;
//  ioctl$sock_SIOCGIFINDEX_80211 arguments: [
//    fd: sock (resource)
//    cmd: const = 0x8933 (4 bytes)
//    arg: ptr[out, ifreq_dev_t[nl80211_devnames, nl80211_ifindex]] {
//      ifreq_dev_t[nl80211_devnames, nl80211_ifindex] {
//        ifr_ifrn: buffer: {77 6c 61 6e 31 00 00 00 00 00 00 00 00 00 00 00} (length 0x10)
//        elem: nl80211_ifindex (resource)
//        pad = 0x0 (20 bytes)
//      }
//    }
//  ]
memcpy((void*)0x2000000000c0, "wlan1\000\000\000\000\000\000\000\000\000\000\000", 16);
	res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933, /*arg=*/0x2000000000c0ul);
	if (res != -1)
r[5] = *(uint32_t*)0x2000000000d0;
//  sendmsg$NL80211_CMD_CONNECT arguments: [
//    fd: sock_nl_generic (resource)
//    msg: ptr[in, msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]]] {
//      msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]] {
//        addr: nil
//        addrlen: len = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//        vec: ptr[in, iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]]] {
//          iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]] {
//            addr: ptr[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]] {
//              netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect] {
//                len: len = 0x30 (4 bytes)
//                type: nl80211_family_id (resource)
//                flags: netlink_msg_flags = 0x5 (2 bytes)
//                seq: int32 = 0x0 (4 bytes)
//                pid: int32 = 0x0 (4 bytes)
//                payload: msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload] {
//                  genl_hdr: genlmsghdr_t[NL80211_CMD_CONNECT] {
//                    cmd: const = 0x2e (1 bytes)
//                    version: const = 0x0 (1 bytes)
//                    reserved: const = 0x0 (2 bytes)
//                  }
//                  payload: nl80211_wdev_payload {
//                    NL80211_ATTR_IFINDEX: union optional[nlattr[NL80211_ATTR_IFINDEX, nl80211_ifindex]] {
//                      val: nlattr_t[const[NL80211_ATTR_IFINDEX, int16], nl80211_ifindex] {
//                        nla_len: offsetof = 0x8 (2 bytes)
//                        nla_type: const = 0x3 (2 bytes)
//                        payload: nl80211_ifindex (resource)
//                        size: buffer: {} (length 0x0)
//                      }
//                    }
//                    NL80211_ATTR_WDEV: union optional[nlattr[NL80211_ATTR_WDEV, nl80211_wdev]] {
//                      void: buffer: {} (length 0x0)
//                    }
//                  }
//                }
//                attrs: array[nl80211_policy$connect] {
//                  union nl80211_policy$connect {
//                    NL80211_ATTR_SSID: nlattr_t[const[NL80211_ATTR_SSID, int16], ieee80211_ssid] {
//                      nla_len: offsetof = 0xa (2 bytes)
//                      nla_type: const = 0x34 (2 bytes)
//                      payload: union ieee80211_ssid {
//                        default_ap_ssid: buffer: {02 02 02 02 02 02} (length 0x6)
//                      }
//                      size: buffer: {} (length 0x0)
//                    }
//                  }
//                  union nl80211_policy$connect {
//                    chandef_params: array[nl80211_policy$chandef_params] {
//                      union nl80211_policy$chandef_params {
//                        NL80211_ATTR_WIPHY_FREQ: nlattr_t[const[NL80211_ATTR_WIPHY_FREQ, int16], ieee80211_frequency_mhz[int32]] {
//                          nla_len: offsetof = 0x8 (2 bytes)
//                          nla_type: const = 0x26 (2 bytes)
//                          payload: union ieee80211_frequency_mhz[int32] {
//                            default: const = 0x96c (4 bytes)
//                          }
//                          size: buffer: {} (length 0x0)
//                        }
//                      }
//                    }
//                  }
//                }
//              }
//            }
//            len: len = 0x30 (8 bytes)
//          }
//        }
//        vlen: const = 0x1 (8 bytes)
//        ctrl: const = 0x0 (8 bytes)
//        ctrllen: const = 0x0 (8 bytes)
//        f: send_flags = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//      }
//    }
//    f: send_flags = 0x0 (8 bytes)
//  ]
*(uint64_t*)0x2000000001c0 = 0;
*(uint32_t*)0x2000000001c8 = 0;
*(uint64_t*)0x2000000001d0 = 0x200000000380;
*(uint64_t*)0x200000000380 = 0x200000000240;
*(uint32_t*)0x200000000240 = 0x30;
*(uint16_t*)0x200000000244 = r[4];
*(uint16_t*)0x200000000246 = 5;
*(uint32_t*)0x200000000248 = 0;
*(uint32_t*)0x20000000024c = 0;
*(uint8_t*)0x200000000250 = 0x2e;
*(uint8_t*)0x200000000251 = 0;
*(uint16_t*)0x200000000252 = 0;
*(uint16_t*)0x200000000254 = 8;
*(uint16_t*)0x200000000256 = 3;
*(uint32_t*)0x200000000258 = r[5];
*(uint16_t*)0x20000000025c = 0xa;
*(uint16_t*)0x20000000025e = 0x34;
memset((void*)0x200000000260, 2, 6);
*(uint16_t*)0x200000000268 = 8;
*(uint16_t*)0x20000000026a = 0x26;
*(uint32_t*)0x20000000026c = 0x96c;
*(uint64_t*)0x200000000388 = 0x30;
*(uint64_t*)0x2000000001d8 = 1;
*(uint64_t*)0x2000000001e0 = 0;
*(uint64_t*)0x2000000001e8 = 0;
*(uint32_t*)0x2000000001f0 = 0;
	syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x2000000001c0ul, /*f=*/0ul);
//  syz_80211_inject_frame arguments: [
//    mac_addr: ptr[in, ieee80211_mac_addr] {
//      union ieee80211_mac_addr {
//        device_b: ieee80211_fixed_mac_addr[const[0x1, int8]] {
//          byte0: const = 0x8 (1 bytes)
//          byte1: const = 0x2 (1 bytes)
//          byte2: const = 0x11 (1 bytes)
//          byte3: const = 0x0 (1 bytes)
//          byte4: const = 0x0 (1 bytes)
//          byte5: const = 0x1 (1 bytes)
//        }
//      }
//    }
//    buf: ptr[inout, array[ANYUNION]] {
//      array[ANYUNION] {
//        union ANYUNION {
//          ANYBLOB: buffer: {50 00 00 00 08 02 11 00 00 01 ff ff ff ff ff ff 08 02 11 00 00 00 00 00 00 00 00 00 00 00 00 00 64 00 01 00 00 06 02 02 02 02 02 02 01 01 0b} (length 0x2f)
//        }
//      }
//    }
//    buf_len: len = 0x48 (8 bytes)
//  ]
*(uint8_t*)0x200000000040 = 8;
*(uint8_t*)0x200000000041 = 2;
*(uint8_t*)0x200000000042 = 0x11;
*(uint8_t*)0x200000000043 = 0;
*(uint8_t*)0x200000000044 = 0;
*(uint8_t*)0x200000000045 = 1;
memcpy((void*)0x200000000280, "... [truncated large byte array] ...", 47);
syz_80211_inject_frame(/*mac_addr=*/0x200000000040, /*buf=*/0x200000000280, /*buf_len=*/0x48);
//  syz_80211_inject_frame arguments: [
//    mac_addr: ptr[in, ieee80211_mac_addr] {
//      union ieee80211_mac_addr {
//        device_b: ieee80211_fixed_mac_addr[const[0x1, int8]] {
//          byte0: const = 0x8 (1 bytes)
//          byte1: const = 0x2 (1 bytes)
//          byte2: const = 0x11 (1 bytes)
//          byte3: const = 0x0 (1 bytes)
//          byte4: const = 0x0 (1 bytes)
//          byte5: const = 0x1 (1 bytes)
//        }
//      }
//    }
//    buf: ptr[inout, array[ANYUNION]] {
//      array[ANYUNION] {
//        union ANYUNION {
//          ANYBLOB: buffer: {b0 00 00 00 08 02 11 00 00 01 08 02 11 00 00 00 08 02 11 00 00 00 10 00 00 00 02} (length 0x1b)
//        }
//      }
//    }
//    buf_len: len = 0x1e (8 bytes)
//  ]
*(uint8_t*)0x2000000003c0 = 8;
*(uint8_t*)0x2000000003c1 = 2;
*(uint8_t*)0x2000000003c2 = 0x11;
*(uint8_t*)0x2000000003c3 = 0;
*(uint8_t*)0x2000000003c4 = 0;
*(uint8_t*)0x2000000003c5 = 1;
memcpy((void*)0x2000000021c0, "\xb0\x00\x00\x00\x08\x02\x11\x00\x00\x01\x08\x02\x11\x00\x00\x00\x08\x02\x11\x00\x00\x00\x10\x00\x00\x00\x02", 27);
syz_80211_inject_frame(/*mac_addr=*/0x2000000003c0, /*buf=*/0x2000000021c0, /*buf_len=*/0x1e);
//  syz_80211_inject_frame arguments: [
//    mac_addr: ptr[in, ieee80211_mac_addr] {
//      union ieee80211_mac_addr {
//        device_b: ieee80211_fixed_mac_addr[const[0x1, int8]] {
//          byte0: const = 0x8 (1 bytes)
//          byte1: const = 0x2 (1 bytes)
//          byte2: const = 0x11 (1 bytes)
//          byte3: const = 0x0 (1 bytes)
//          byte4: const = 0x0 (1 bytes)
//          byte5: const = 0x1 (1 bytes)
//        }
//      }
//    }
//    buf: ptr[inout, array[ANYUNION]] {
//      array[ANYUNION] {
//        union ANYUNION {
//          ANYBLOB: buffer: {10 00 00 00 08 02 11 00 00 01 08 02 11 00 00 00 08 02 11 00 00 00 20 00 04 a0 00 00 0c 00 01} (length 0x1f)
//        }
//      }
//    }
//    buf_len: len = 0x3c (8 bytes)
//  ]
*(uint8_t*)0x2000000004c0 = 8;
*(uint8_t*)0x2000000004c1 = 2;
*(uint8_t*)0x2000000004c2 = 0x11;
*(uint8_t*)0x2000000004c3 = 0;
*(uint8_t*)0x2000000004c4 = 0;
*(uint8_t*)0x2000000004c5 = 1;
memcpy((void*)0x200000000440, "\x10\x00\x00\x00\x08\x02\x11\x00\x00\x01\x08\x02\x11\x00\x00\x00\x08\x02\x11\x00\x00\x00\x20\x00\x04\xa0\x00\x00\x0c\x00\x01", 31);
syz_80211_inject_frame(/*mac_addr=*/0x2000000004c0, /*buf=*/0x200000000440, /*buf_len=*/0x3c);
//  socket$nl_generic arguments: [
//    domain: const = 0x10 (8 bytes)
//    type: const = 0x3 (8 bytes)
//    proto: const = 0x10 (4 bytes)
//  ]
//  returns sock_nl_generic
	res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
	if (res != -1)
		r[6] = res;
//  ioctl$sock_SIOCGIFINDEX_80211 arguments: [
//    fd: sock (resource)
//    cmd: const = 0x8933 (4 bytes)
//    arg: ptr[out, ifreq_dev_t[nl80211_devnames, nl80211_ifindex]] {
//      ifreq_dev_t[nl80211_devnames, nl80211_ifindex] {
//        ifr_ifrn: buffer: {77 6c 61 6e 31 00 00 00 00 00 00 00 00 00 00 00} (length 0x10)
//        elem: nl80211_ifindex (resource)
//        pad = 0x0 (20 bytes)
//      }
//    }
//  ]
memcpy((void*)0x200000000240, "wlan1\000\000\000\000\000\000\000\000\000\000\000", 16);
	res = syscall(__NR_ioctl, /*fd=*/r[6], /*cmd=*/0x8933, /*arg=*/0x200000000240ul);
	if (res != -1)
r[7] = *(uint32_t*)0x200000000250;
//  syz_genetlink_get_family_id$nl80211 arguments: [
//    name: ptr[in, buffer] {
//      buffer: {6e 6c 38 30 32 31 31 00} (length 0x8)
//    }
//    fd: sock_nl_generic (resource)
//  ]
//  returns nl80211_family_id
memcpy((void*)0x200000000380, "nl80211\000", 8);
	res = -1;
res = syz_genetlink_get_family_id(/*name=*/0x200000000380, /*fd=*/-1);
	if (res != -1)
		r[8] = res;
//  sendmsg$NL80211_CMD_TDLS_MGMT arguments: [
//    fd: sock_nl_generic (resource)
//    msg: ptr[in, msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_TDLS_MGMT, nl80211_wdev_payload], nl80211_policy$tdls_mgmt]]] {
//      msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_TDLS_MGMT, nl80211_wdev_payload], nl80211_policy$tdls_mgmt]] {
//        addr: nil
//        addrlen: len = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//        vec: ptr[in, iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_TDLS_MGMT, nl80211_wdev_payload], nl80211_policy$tdls_mgmt]]] {
//          iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_TDLS_MGMT, nl80211_wdev_payload], nl80211_policy$tdls_mgmt]] {
//            addr: ptr[inout, array[ANYUNION]] {
//              array[ANYUNION] {
//                union ANYUNION {
//                  ANYBLOB: buffer: {98 00 00 00} (length 0x4)
//                }
//                union ANYUNION {
//                  ANYRES16: ANYRES16 (resource)
//                }
//                union ANYUNION {
//                  ANYBLOB: buffer: {01 00 00 00 00 00 00 00 00 00 52 00 00 00 08 00 03 00} (length 0x12)
//                }
//                union ANYUNION {
//                  ANYRES32: ANYRES32 (resource)
//                }
//                union ANYUNION {
//                  ANYBLOB: buffer: {06 00 48 00 00 00 00 00 0a 00 06 00 08 02 80 58 5c 8c 00 00 05 00 88 00 02 00 00 00 58 00 2a 00 37 52 00 00 62 ec b7 73 0d ee fe 2f c8 35 3f 15 7e 03 9f b4 12 74 0b 5d b1 3d 0d 69 8b 68 e5 5e 57 8a f5 49 95 2f 0a 25 31 d2 dd a9 99 16 9c 51 61 1e bb 52 f8 0c 2f 2f 66 04 9b d0 69 ed 4d a1 3a 2e db ae 15 c1 55 41 a3 bc 8d d3 2e 92 16 bd 65 68 ff db 05 00 89 00 00 00 00 00} (length 0x7c)
//                }
//              }
//            }
//            len: len = 0x98 (8 bytes)
//          }
//        }
//        vlen: const = 0x1 (8 bytes)
//        ctrl: const = 0x0 (8 bytes)
//        ctrllen: const = 0x0 (8 bytes)
//        f: send_flags = 0x20000000 (4 bytes)
//        pad = 0x0 (4 bytes)
//      }
//    }
//    f: send_flags = 0x0 (8 bytes)
//  ]
*(uint64_t*)0x200000000000 = 0;
*(uint32_t*)0x200000000008 = 0;
*(uint64_t*)0x200000000010 = 0x200000000200;
*(uint64_t*)0x200000000200 = 0x200000000580;
memcpy((void*)0x200000000580, "\x98\x00\x00\x00", 4);
*(uint16_t*)0x200000000584 = r[8];
memcpy((void*)0x200000000586, "\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x52\x00\x00\x00\x08\x00\x03\x00", 18);
*(uint32_t*)0x200000000598 = r[7];
memcpy((void*)0x20000000059c, "... [truncated large byte array] ...", 124);
*(uint64_t*)0x200000000208 = 0x98;
*(uint64_t*)0x200000000018 = 1;
*(uint64_t*)0x200000000020 = 0;
*(uint64_t*)0x200000000028 = 0;
*(uint32_t*)0x200000000030 = 0x20000000;
	syscall(__NR_sendmsg, /*fd=*/r[6], /*msg=*/0x200000000000ul, /*f=*/0ul);
	return 0;
}
]

map[KernelSrc:/app/workdir/cache/src/467e55f613aaf753738bad9aa4d4d66a1b3a23eb]

map[KernelObj:/app/workdir/cache/build/be9a0c59c1cf80f5d69b27b9f8571d09834ac637]

map[Index:codesearch-index]

gemini-3.1-pro-preview

map[DenialOfService:false Exploitable:false FilesystemTrigger:false NetworkTrigger:false PeripheralTrigger:false RemoteTrigger:false Unprivileged:false UserNamespace:true VMGuestTrigger:false VMHostTrigger:false]

You are an experienced Linux kernel security engineer. Your task is to analyze given kernel bug report
and determine its security impact based on the following dimensions.

Use the provided tools to examine the source code, check for capability checks (e.g., capable(), ns_capable()),
and understand the nature of the bug. Analyze the given kernel build and configuration.
You can check the kernel config by grepping ".config" file; you can check kernel cmdline by greeping
".config" file for "CONFIG_CMDLINE=". Assume sysctl parameters have default values.
But analyze for the corresponding production build w/o debugging tools enabled (like KASAN, KMSAN, UBSAN).

Try different strategies when analyzing the bug:
 - think of ways in which the vulnerable code is unreachable
 - or the other way around: try to come up with different ideas of how an unprivileged user can reach the bug
If still unsure err on the side of the bug being non-exploitable/not-accessible.
In the final reply, provide a reasoning for your assessment.

Analysis dimensions:

* Exploitable:
Determine if the bug can result in memory corruption or elevated privileges.
Memory safety issues are almost always exploitable (KASAN or UBSAN reports for use-after-free, out-of-bounds;
refcounting issues, corrupted lists, etc). When kernel is crashing on a completly wild pointer access
(e.g. user-space address, or non-canonical address, but not on NULL or address corresponding to KASAN shadow
for NULL address), including both data accesses and control tranfers, that's also usually implies possibility
of exploitation. Such reports usually say "unable to handle kernel paging request".
Uses of uninitialized values detected by KMSAN may be exploitable b/c attacker frequently can affect uninit
values with spraying techniques. However, for these exploitabability depends on how exactly the uninit value
is used in the code, and what it affects.

Think of what happens after the bug is triggered. Some bugs cause kernel panic and halt execution,
they are harder to exploit. For example, BUG reports halts the kernel. However, WARNING reports don't halt
execution in production builds. Debug bug detection tools (like KASAN, KMSAN, KCSAN, UBSAN) are also not enabled
in production builds, so attacker can freely exploit these bugs w/o being detected by these tools.
If you see an integer overflow, think how the overflowed value used later (if it's used as allocation size,
or an array index). If you see an out-of-bounds read, think if it's followed by an out-of-bounds write as well.
Some KCSAN data-races may be exploitable by skilled attackers as well. Think what data structures got corrupted
as the result of data races and how. However, note that kernel has lots of "benign" data races that don't lead
to any runtime misbehavior at all.

* Denial Of Service:
Determine if the bug can result in denial-of-service. Most bugs can, since they cause system crash,
hangs, deadlocks, or resource leaks. This is mostly applicable to WARNING bugs that won't cause system crash
in production. For these think what will be consequences of the violation of the kernel assumptions flagged
by the WARNING. In some cases the unexpected condition is also properly handled by the normal control flow
(e.g. with "if (WARN_ON(...))"), these won't cause denial-of-service. If the condition is not handled,
then it may or may not cause denial-of-service.

* Accessible From Unprivileged Processes:
Determine if the bug can be reached from a typical (non-root) user process that does NOT have any special capabilities
(like CAP_SYS_ADMIN, CAP_NET_ADMIN, CAP_NET_RAW, CAP_PERFMON) or access to device nodes restricted to root.
Assume that unprivileged_bpf_disabled=1, that is eBPF loading is not accessible. However, cBPF (classical BPF)
is still accessible to non-root processes.
Assume that user namespaces are not accessible, that is, the process cannot get the mentioned capabilities even
within a new user namespace (checked by ns_capable() function in the kernel sources).

* Accessible From User Namespaces:
Determine if the bug can be reached within a user-namespace where the process has all capabilities
(including CAP_SYS_ADMIN, CAP_NET_ADMIN, CAP_NET_RAW, CAP_PERFMON). Such capabilities are checked with ns_capable()
function in the kernel sources.

* VM Guest Trigger:
Determine if the bug can be triggered from the context of a typical KVM guest (e.g., set up by a QEMU VMM).
Consider accesses to standard Linux host paravirtualized features (virtio-blk, virtio-net, etc.),
and handling of VM exits in the KVM code.

* VM Host Trigger in The Confidetial Computing Context:
Determine if the bug can be triggered in a confidential computing guest kernel from the context of a KVM host.
Consider access to standard Linux guest paravirtualized features (virtio-blk, virtio-net, etc.).

* Ethernet Network Trigger:
Determine if the bug can be triggered by processing ingress network Ethernet traffic, either directly (network stack)
or via drivers exposed to network data.

* Other Remote Trigger:
Determine if the bug can be triggered by processing remote traffic other than Ethernet (Wifi, Bluetooth, NFC, etc).

* Peripheral Trigger:
Determine if the bug can be triggered via an untrusted peripheral device that can be physically plugged
into a system, such as a USB device or a niche hardware driver handling external hardware inputs.
This is particularly important for mobile and desktop environments where users can plug in unknown devices.

* Malicious Filesystem Trigger:
Determine if the bug can be triggered by the kernel mounting and parsing a malicious filesystem image.
This is highly critical for Desktop and Mobile environments where external media or downloaded images
might be auto-mounted.

Don't make assumptions about the kernel source code (it may be different from what you assume it is).
Extensively use the provided code access tools (codesearch-*, git-*, grepper, etc)
to examine the actual source code, and confirm any assumptions.

Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

The kernel bug report is:

mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
------------[ cut here ]------------
!sta || !ap_sta
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_setup_cfm_ies net/mac80211/tdls.c:611 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_ies net/mac80211/tdls.c:762 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_build_mgmt_packet_data+0x2ea1/0x4050 net/mac80211/tdls.c:984, CPU#0: syz.0.596/6699
Modules linked in:
CPU: 0 UID: 0 PID: 6699 Comm: syz.0.596 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ieee80211_tdls_add_setup_cfm_ies net/mac80211/tdls.c:611 [inline]
RIP: 0010:ieee80211_tdls_add_ies net/mac80211/tdls.c:762 [inline]
RIP: 0010:ieee80211_tdls_build_mgmt_packet_data+0x2ea1/0x4050 net/mac80211/tdls.c:984
Code: fc ff df e9 a1 fe ff ff e8 4c 0a 88 f6 90 0f 0b 90 e9 78 fe ff ff e8 3e 0a 88 f6 90 0f 0b 90 e9 85 fe ff ff e8 30 0a 88 f6 90 <0f> 0b 90 e9 77 fe ff ff e8 22 0a 88 f6 48 c7 c7 30 99 eb 8f 4c 89
RSP: 0018:ffffc900032a7080 EFLAGS: 00010293
RAX: ffffffff8b3da4c0 RBX: ffff888031090e00 RCX: ffff88802c341e80
RDX: 0000000000000000 RSI: ffffffff8e16b1b3 RDI: ffff88802c341e80
RBP: ffffc900032a7200 R08: 0000000000000000 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000000000 R12: ffff888031092610
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888031088ec0
FS:  0000555594b4c500(0000) GS:ffff888125457000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000021c0 CR3: 000000007eb3e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ieee80211_tdls_prep_mgmt_packet+0x3a4/0x820 net/mac80211/tdls.c:1058
 ieee80211_tdls_mgmt+0x32e/0x840 net/mac80211/tdls.c:1299
 rdev_tdls_mgmt net/wireless/rdev-ops.h:932 [inline]
 nl80211_tdls_mgmt+0x4da/0x7a0 net/wireless/nl80211.c:13723
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344




It is reproducible with the followint program.
Keep in mind that it may lack the precise threading, sandboxing, and some arguments of a working reproducer.
But it should give an idea of the involved syscalls.

// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE 

#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <net/if.h>
#include <netinet/in.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/in6.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/nl80211.h>
#include <linux/rtnetlink.h>
#include <linux/veth.h>

struct nlmsg {
	char* pos;
	int nesting;
	struct nlattr* nested[8];
	char buf[4096];
};

static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
			 const void* data, int size)
{
	memset(nlmsg, 0, sizeof(*nlmsg));
	struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
	hdr->nlmsg_type = typ;
	hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
	memcpy(hdr + 1, data, size);
	nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}

static void netlink_attr(struct nlmsg* nlmsg, int typ,
			 const void* data, int size)
{
	struct nlattr* attr = (struct nlattr*)nlmsg->pos;
	attr->nla_len = sizeof(*attr) + size;
	attr->nla_type = typ;
	if (size > 0)
		memcpy(attr + 1, data, size);
	nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}

static int netlink_send_ext(struct nlmsg* nlmsg, int sock,
			    uint16_t reply_type, int* reply_len, bool dofail)
{
	if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
	exit(1);
	struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
	hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
	struct sockaddr_nl addr;
	memset(&addr, 0, sizeof(addr));
	addr.nl_family = AF_NETLINK;
	ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr));
	if (n != (ssize_t)hdr->nlmsg_len) {
		if (dofail)
	exit(1);
		return -1;
	}
	n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
	if (reply_len)
		*reply_len = 0;
	if (n < 0) {
		if (dofail)
	exit(1);
		return -1;
	}
	if (n < (ssize_t)sizeof(struct nlmsghdr)) {
		errno = EINVAL;
		if (dofail)
	exit(1);
		return -1;
	}
	if (hdr->nlmsg_type == NLMSG_DONE)
		return 0;
	if (reply_len && hdr->nlmsg_type == reply_type) {
		*reply_len = n;
		return 0;
	}
	if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
		errno = EINVAL;
		if (dofail)
	exit(1);
		return -1;
	}
	if (hdr->nlmsg_type != NLMSG_ERROR) {
		errno = EINVAL;
		if (dofail)
	exit(1);
		return -1;
	}
	errno = -((struct nlmsgerr*)(hdr + 1))->error;
	return -errno;
}

static int netlink_query_family_id(struct nlmsg* nlmsg, int sock, const char* family_name, bool dofail)
{
	struct genlmsghdr genlhdr;
	memset(&genlhdr, 0, sizeof(genlhdr));
	genlhdr.cmd = CTRL_CMD_GETFAMILY;
	netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
	netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name, strnlen(family_name, GENL_NAMSIZ - 1) + 1);
	int n = 0;
	int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
	if (err < 0) {
		return -1;
	}
	uint16_t id = 0;
	struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN + NLMSG_ALIGN(sizeof(genlhdr)));
	for (; (char*)attr < nlmsg->buf + n; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
		if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
			id = *(uint16_t*)(attr + 1);
			break;
		}
	}
	if (!id) {
		errno = EINVAL;
		return -1;
	}
	recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
	return id;
}

#define WIFI_INITIAL_DEVICE_COUNT 2
#define WIFI_MAC_BASE { 0x08, 0x02, 0x11, 0x00, 0x00, 0x00}
#define WIFI_IBSS_BSSID { 0x50, 0x50, 0x50, 0x50, 0x50, 0x50}
#define WIFI_IBSS_SSID { 0x10, 0x10, 0x10, 0x10, 0x10, 0x10}
#define WIFI_DEFAULT_FREQUENCY 2412
#define WIFI_DEFAULT_SIGNAL 0
#define WIFI_DEFAULT_RX_RATE 1
#define HWSIM_CMD_REGISTER 1
#define HWSIM_CMD_FRAME 2
#define HWSIM_CMD_NEW_RADIO 4
#define HWSIM_ATTR_SUPPORT_P2P_DEVICE 14
#define HWSIM_ATTR_PERM_ADDR 22

static long syz_genetlink_get_family_id(volatile long name, volatile long sock_arg)
{
	int fd = sock_arg;
	if (fd < 0) {
		fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
		if (fd == -1) {
			return -1;
		}
	}
	struct nlmsg nlmsg_tmp;
	int ret = netlink_query_family_id(&nlmsg_tmp, fd, (char*)name, false);
	if ((int)sock_arg < 0)
		close(fd);
	if (ret < 0) {
		return -1;
	}
	return ret;
}

#define HWSIM_ATTR_RX_RATE 5
#define HWSIM_ATTR_SIGNAL 6
#define HWSIM_ATTR_ADDR_RECEIVER 1
#define HWSIM_ATTR_FRAME 3

#define WIFI_MAX_INJECT_LEN 2048

static int hwsim_register_socket(struct nlmsg* nlmsg, int sock, int hwsim_family)
{
	struct genlmsghdr genlhdr;
	memset(&genlhdr, 0, sizeof(genlhdr));
	genlhdr.cmd = HWSIM_CMD_REGISTER;
	netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr));
	int err = netlink_send_ext(nlmsg, sock, 0, NULL, false);
	if (err < 0) {
	}
	return err;
}

static int hwsim_inject_frame(struct nlmsg* nlmsg, int sock, int hwsim_family, uint8_t* mac_addr, uint8_t* data, int len)
{
	struct genlmsghdr genlhdr;
	uint32_t rx_rate = WIFI_DEFAULT_RX_RATE;
	uint32_t signal = WIFI_DEFAULT_SIGNAL;
	memset(&genlhdr, 0, sizeof(genlhdr));
	genlhdr.cmd = HWSIM_CMD_FRAME;
	netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr));
	netlink_attr(nlmsg, HWSIM_ATTR_RX_RATE, &rx_rate, sizeof(rx_rate));
	netlink_attr(nlmsg, HWSIM_ATTR_SIGNAL, &signal, sizeof(signal));
	netlink_attr(nlmsg, HWSIM_ATTR_ADDR_RECEIVER, mac_addr, ETH_ALEN);
	netlink_attr(nlmsg, HWSIM_ATTR_FRAME, data, len);
	int err = netlink_send_ext(nlmsg, sock, 0, NULL, false);
	if (err < 0) {
	}
	return err;
}

static long syz_80211_inject_frame(volatile long a0, volatile long a1, volatile long a2)
{
	uint8_t* mac_addr = (uint8_t*)a0;
	uint8_t* buf = (uint8_t*)a1;
	int buf_len = (int)a2;
	struct nlmsg tmp_msg;
	if (buf_len < 0 || buf_len > WIFI_MAX_INJECT_LEN) {
		return -1;
	}
	int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
	if (sock < 0) {
		return -1;
	}
	int hwsim_family_id = netlink_query_family_id(&tmp_msg, sock, "MAC80211_HWSIM", false);
	if (hwsim_family_id < 0) {
		close(sock);
		return -1;
	}
	int ret = hwsim_register_socket(&tmp_msg, sock, hwsim_family_id);
	if (ret < 0) {
		close(sock);
		return -1;
	}
	ret = hwsim_inject_frame(&tmp_msg, sock, hwsim_family_id, mac_addr, buf, buf_len);
	close(sock);
	if (ret < 0) {
		return -1;
	}
	return 0;
}

uint64_t r[9] = {0xffffffffffffffff, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

int main(void)
{
		syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul);
	syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul);
	syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul);
	const char* reason;
	(void)reason;
				intptr_t res = 0;
	if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {}
//  socket$nl_generic arguments: [
//    domain: const = 0x10 (8 bytes)
//    type: const = 0x3 (8 bytes)
//    proto: const = 0x10 (4 bytes)
//  ]
//  returns sock_nl_generic
	res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
	if (res != -1)
		r[0] = res;
//  syz_genetlink_get_family_id$nl80211 arguments: [
//    name: ptr[in, buffer] {
//      buffer: {6e 6c 38 30 32 31 31 00} (length 0x8)
//    }
//    fd: sock_nl_generic (resource)
//  ]
//  returns nl80211_family_id
memcpy((void*)0x200000000080, "nl80211\000", 8);
	res = -1;
res = syz_genetlink_get_family_id(/*name=*/0x200000000080, /*fd=*/-1);
	if (res != -1)
		r[1] = res;
//  ioctl$sock_SIOCGIFINDEX_80211 arguments: [
//    fd: sock (resource)
//    cmd: const = 0x8933 (4 bytes)
//    arg: ptr[out, ifreq_dev_t[nl80211_devnames, nl80211_ifindex]] {
//      ifreq_dev_t[nl80211_devnames, nl80211_ifindex] {
//        ifr_ifrn: buffer: {77 6c 61 6e 31 00 00 00 00 00 00 00 00 00 00 00} (length 0x10)
//        elem: nl80211_ifindex (resource)
//        pad = 0x0 (20 bytes)
//      }
//    }
//  ]
memcpy((void*)0x2000000000c0, "wlan1\000\000\000\000\000\000\000\000\000\000\000", 16);
	res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933, /*arg=*/0x2000000000c0ul);
	if (res != -1)
r[2] = *(uint32_t*)0x2000000000d0;
//  sendmsg$NL80211_CMD_SET_INTERFACE arguments: [
//    fd: sock_nl_generic (resource)
//    msg: ptr[in, msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]]] {
//      msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]] {
//        addr: nil
//        addrlen: len = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//        vec: ptr[in, iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]]] {
//          iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]] {
//            addr: ptr[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface]] {
//              netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload], nl80211_policy$set_interface] {
//                len: len = 0x24 (4 bytes)
//                type: nl80211_family_id (resource)
//                flags: netlink_msg_flags = 0x5 (2 bytes)
//                seq: int32 = 0x0 (4 bytes)
//                pid: int32 = 0x0 (4 bytes)
//                payload: msg_nl80211_payload[NL80211_CMD_SET_INTERFACE, nl80211_wdev_payload] {
//                  genl_hdr: genlmsghdr_t[NL80211_CMD_SET_INTERFACE] {
//                    cmd: const = 0x6 (1 bytes)
//                    version: const = 0x0 (1 bytes)
//                    reserved: const = 0x0 (2 bytes)
//                  }
//                  payload: nl80211_wdev_payload {
//                    NL80211_ATTR_IFINDEX: union optional[nlattr[NL80211_ATTR_IFINDEX, nl80211_ifindex]] {
//                      val: nlattr_t[const[NL80211_ATTR_IFINDEX, int16], nl80211_ifindex] {
//                        nla_len: offsetof = 0x8 (2 bytes)
//                        nla_type: const = 0x3 (2 bytes)
//                        payload: nl80211_ifindex (resource)
//                        size: buffer: {} (length 0x0)
//                      }
//                    }
//                    NL80211_ATTR_WDEV: union optional[nlattr[NL80211_ATTR_WDEV, nl80211_wdev]] {
//                      void: buffer: {} (length 0x0)
//                    }
//                  }
//                }
//                attrs: array[nl80211_policy$set_interface] {
//                  union nl80211_policy$set_interface {
//                    NL80211_ATTR_IFTYPE: nlattr_t[const[NL80211_ATTR_IFTYPE, int16], flags[nl80211_iftype, int32]] {
//                      nla_len: offsetof = 0x8 (2 bytes)
//                      nla_type: const = 0x5 (2 bytes)
//                      payload: nl80211_iftype = 0x2 (4 bytes)
//                      size: buffer: {} (length 0x0)
//                    }
//                  }
//                }
//              }
//            }
//            len: len = 0x24 (8 bytes)
//          }
//        }
//        vlen: const = 0x1 (8 bytes)
//        ctrl: const = 0x0 (8 bytes)
//        ctrllen: const = 0x0 (8 bytes)
//        f: send_flags = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//      }
//    }
//    f: send_flags = 0x0 (8 bytes)
//  ]
*(uint64_t*)0x200000000100 = 0;
*(uint32_t*)0x200000000108 = 0;
*(uint64_t*)0x200000000110 = 0x200000000140;
*(uint64_t*)0x200000000140 = 0x200000000180;
*(uint32_t*)0x200000000180 = 0x24;
*(uint16_t*)0x200000000184 = r[1];
*(uint16_t*)0x200000000186 = 5;
*(uint32_t*)0x200000000188 = 0;
*(uint32_t*)0x20000000018c = 0;
*(uint8_t*)0x200000000190 = 6;
*(uint8_t*)0x200000000191 = 0;
*(uint16_t*)0x200000000192 = 0;
*(uint16_t*)0x200000000194 = 8;
*(uint16_t*)0x200000000196 = 3;
*(uint32_t*)0x200000000198 = r[2];
*(uint16_t*)0x20000000019c = 8;
*(uint16_t*)0x20000000019e = 5;
*(uint32_t*)0x2000000001a0 = 2;
*(uint64_t*)0x200000000148 = 0x24;
*(uint64_t*)0x200000000118 = 1;
*(uint64_t*)0x200000000120 = 0;
*(uint64_t*)0x200000000128 = 0;
*(uint32_t*)0x200000000130 = 0;
	syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000100ul, /*f=*/0ul);
//  socket$nl_generic arguments: [
//    domain: const = 0x10 (8 bytes)
//    type: const = 0x3 (8 bytes)
//    proto: const = 0x10 (4 bytes)
//  ]
//  returns sock_nl_generic
	res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
	if (res != -1)
		r[3] = res;
//  syz_genetlink_get_family_id$nl80211 arguments: [
//    name: ptr[in, buffer] {
//      buffer: {6e 6c 38 30 32 31 31 00} (length 0x8)
//    }
//    fd: sock_nl_generic (resource)
//  ]
//  returns nl80211_family_id
memcpy((void*)0x200000000080, "nl80211\000", 8);
	res = -1;
res = syz_genetlink_get_family_id(/*name=*/0x200000000080, /*fd=*/-1);
	if (res != -1)
		r[4] = res;
//  ioctl$sock_SIOCGIFINDEX_80211 arguments: [
//    fd: sock (resource)
//    cmd: const = 0x8933 (4 bytes)
//    arg: ptr[out, ifreq_dev_t[nl80211_devnames, nl80211_ifindex]] {
//      ifreq_dev_t[nl80211_devnames, nl80211_ifindex] {
//        ifr_ifrn: buffer: {77 6c 61 6e 31 00 00 00 00 00 00 00 00 00 00 00} (length 0x10)
//        elem: nl80211_ifindex (resource)
//        pad = 0x0 (20 bytes)
//      }
//    }
//  ]
memcpy((void*)0x2000000000c0, "wlan1\000\000\000\000\000\000\000\000\000\000\000", 16);
	res = syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x8933, /*arg=*/0x2000000000c0ul);
	if (res != -1)
r[5] = *(uint32_t*)0x2000000000d0;
//  sendmsg$NL80211_CMD_CONNECT arguments: [
//    fd: sock_nl_generic (resource)
//    msg: ptr[in, msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]]] {
//      msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]] {
//        addr: nil
//        addrlen: len = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//        vec: ptr[in, iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]]] {
//          iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]] {
//            addr: ptr[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect]] {
//              netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload], nl80211_policy$connect] {
//                len: len = 0x30 (4 bytes)
//                type: nl80211_family_id (resource)
//                flags: netlink_msg_flags = 0x5 (2 bytes)
//                seq: int32 = 0x0 (4 bytes)
//                pid: int32 = 0x0 (4 bytes)
//                payload: msg_nl80211_payload[NL80211_CMD_CONNECT, nl80211_wdev_payload] {
//                  genl_hdr: genlmsghdr_t[NL80211_CMD_CONNECT] {
//                    cmd: const = 0x2e (1 bytes)
//                    version: const = 0x0 (1 bytes)
//                    reserved: const = 0x0 (2 bytes)
//                  }
//                  payload: nl80211_wdev_payload {
//                    NL80211_ATTR_IFINDEX: union optional[nlattr[NL80211_ATTR_IFINDEX, nl80211_ifindex]] {
//                      val: nlattr_t[const[NL80211_ATTR_IFINDEX, int16], nl80211_ifindex] {
//                        nla_len: offsetof = 0x8 (2 bytes)
//                        nla_type: const = 0x3 (2 bytes)
//                        payload: nl80211_ifindex (resource)
//                        size: buffer: {} (length 0x0)
//                      }
//                    }
//                    NL80211_ATTR_WDEV: union optional[nlattr[NL80211_ATTR_WDEV, nl80211_wdev]] {
//                      void: buffer: {} (length 0x0)
//                    }
//                  }
//                }
//                attrs: array[nl80211_policy$connect] {
//                  union nl80211_policy$connect {
//                    NL80211_ATTR_SSID: nlattr_t[const[NL80211_ATTR_SSID, int16], ieee80211_ssid] {
//                      nla_len: offsetof = 0xa (2 bytes)
//                      nla_type: const = 0x34 (2 bytes)
//                      payload: union ieee80211_ssid {
//                        default_ap_ssid: buffer: {02 02 02 02 02 02} (length 0x6)
//                      }
//                      size: buffer: {} (length 0x0)
//                    }
//                  }
//                  union nl80211_policy$connect {
//                    chandef_params: array[nl80211_policy$chandef_params] {
//                      union nl80211_policy$chandef_params {
//                        NL80211_ATTR_WIPHY_FREQ: nlattr_t[const[NL80211_ATTR_WIPHY_FREQ, int16], ieee80211_frequency_mhz[int32]] {
//                          nla_len: offsetof = 0x8 (2 bytes)
//                          nla_type: const = 0x26 (2 bytes)
//                          payload: union ieee80211_frequency_mhz[int32] {
//                            default: const = 0x96c (4 bytes)
//                          }
//                          size: buffer: {} (length 0x0)
//                        }
//                      }
//                    }
//                  }
//                }
//              }
//            }
//            len: len = 0x30 (8 bytes)
//          }
//        }
//        vlen: const = 0x1 (8 bytes)
//        ctrl: const = 0x0 (8 bytes)
//        ctrllen: const = 0x0 (8 bytes)
//        f: send_flags = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//      }
//    }
//    f: send_flags = 0x0 (8 bytes)
//  ]
*(uint64_t*)0x2000000001c0 = 0;
*(uint32_t*)0x2000000001c8 = 0;
*(uint64_t*)0x2000000001d0 = 0x200000000380;
*(uint64_t*)0x200000000380 = 0x200000000240;
*(uint32_t*)0x200000000240 = 0x30;
*(uint16_t*)0x200000000244 = r[4];
*(uint16_t*)0x200000000246 = 5;
*(uint32_t*)0x200000000248 = 0;
*(uint32_t*)0x20000000024c = 0;
*(uint8_t*)0x200000000250 = 0x2e;
*(uint8_t*)0x200000000251 = 0;
*(uint16_t*)0x200000000252 = 0;
*(uint16_t*)0x200000000254 = 8;
*(uint16_t*)0x200000000256 = 3;
*(uint32_t*)0x200000000258 = r[5];
*(uint16_t*)0x20000000025c = 0xa;
*(uint16_t*)0x20000000025e = 0x34;
memset((void*)0x200000000260, 2, 6);
*(uint16_t*)0x200000000268 = 8;
*(uint16_t*)0x20000000026a = 0x26;
*(uint32_t*)0x20000000026c = 0x96c;
*(uint64_t*)0x200000000388 = 0x30;
*(uint64_t*)0x2000000001d8 = 1;
*(uint64_t*)0x2000000001e0 = 0;
*(uint64_t*)0x2000000001e8 = 0;
*(uint32_t*)0x2000000001f0 = 0;
	syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x2000000001c0ul, /*f=*/0ul);
//  syz_80211_inject_frame arguments: [
//    mac_addr: ptr[in, ieee80211_mac_addr] {
//      union ieee80211_mac_addr {
//        device_b: ieee80211_fixed_mac_addr[const[0x1, int8]] {
//          byte0: const = 0x8 (1 bytes)
//          byte1: const = 0x2 (1 bytes)
//          byte2: const = 0x11 (1 bytes)
//          byte3: const = 0x0 (1 bytes)
//          byte4: const = 0x0 (1 bytes)
//          byte5: const = 0x1 (1 bytes)
//        }
//      }
//    }
//    buf: ptr[inout, array[ANYUNION]] {
//      array[ANYUNION] {
//        union ANYUNION {
//          ANYBLOB: buffer: {50 00 00 00 08 02 11 00 00 01 ff ff ff ff ff ff 08 02 11 00 00 00 00 00 00 00 00 00 00 00 00 00 64 00 01 00 00 06 02 02 02 02 02 02 01 01 0b} (length 0x2f)
//        }
//      }
//    }
//    buf_len: len = 0x48 (8 bytes)
//  ]
*(uint8_t*)0x200000000040 = 8;
*(uint8_t*)0x200000000041 = 2;
*(uint8_t*)0x200000000042 = 0x11;
*(uint8_t*)0x200000000043 = 0;
*(uint8_t*)0x200000000044 = 0;
*(uint8_t*)0x200000000045 = 1;
memcpy((void*)0x200000000280, "... [truncated large byte array] ...", 47);
syz_80211_inject_frame(/*mac_addr=*/0x200000000040, /*buf=*/0x200000000280, /*buf_len=*/0x48);
//  syz_80211_inject_frame arguments: [
//    mac_addr: ptr[in, ieee80211_mac_addr] {
//      union ieee80211_mac_addr {
//        device_b: ieee80211_fixed_mac_addr[const[0x1, int8]] {
//          byte0: const = 0x8 (1 bytes)
//          byte1: const = 0x2 (1 bytes)
//          byte2: const = 0x11 (1 bytes)
//          byte3: const = 0x0 (1 bytes)
//          byte4: const = 0x0 (1 bytes)
//          byte5: const = 0x1 (1 bytes)
//        }
//      }
//    }
//    buf: ptr[inout, array[ANYUNION]] {
//      array[ANYUNION] {
//        union ANYUNION {
//          ANYBLOB: buffer: {b0 00 00 00 08 02 11 00 00 01 08 02 11 00 00 00 08 02 11 00 00 00 10 00 00 00 02} (length 0x1b)
//        }
//      }
//    }
//    buf_len: len = 0x1e (8 bytes)
//  ]
*(uint8_t*)0x2000000003c0 = 8;
*(uint8_t*)0x2000000003c1 = 2;
*(uint8_t*)0x2000000003c2 = 0x11;
*(uint8_t*)0x2000000003c3 = 0;
*(uint8_t*)0x2000000003c4 = 0;
*(uint8_t*)0x2000000003c5 = 1;
memcpy((void*)0x2000000021c0, "\xb0\x00\x00\x00\x08\x02\x11\x00\x00\x01\x08\x02\x11\x00\x00\x00\x08\x02\x11\x00\x00\x00\x10\x00\x00\x00\x02", 27);
syz_80211_inject_frame(/*mac_addr=*/0x2000000003c0, /*buf=*/0x2000000021c0, /*buf_len=*/0x1e);
//  syz_80211_inject_frame arguments: [
//    mac_addr: ptr[in, ieee80211_mac_addr] {
//      union ieee80211_mac_addr {
//        device_b: ieee80211_fixed_mac_addr[const[0x1, int8]] {
//          byte0: const = 0x8 (1 bytes)
//          byte1: const = 0x2 (1 bytes)
//          byte2: const = 0x11 (1 bytes)
//          byte3: const = 0x0 (1 bytes)
//          byte4: const = 0x0 (1 bytes)
//          byte5: const = 0x1 (1 bytes)
//        }
//      }
//    }
//    buf: ptr[inout, array[ANYUNION]] {
//      array[ANYUNION] {
//        union ANYUNION {
//          ANYBLOB: buffer: {10 00 00 00 08 02 11 00 00 01 08 02 11 00 00 00 08 02 11 00 00 00 20 00 04 a0 00 00 0c 00 01} (length 0x1f)
//        }
//      }
//    }
//    buf_len: len = 0x3c (8 bytes)
//  ]
*(uint8_t*)0x2000000004c0 = 8;
*(uint8_t*)0x2000000004c1 = 2;
*(uint8_t*)0x2000000004c2 = 0x11;
*(uint8_t*)0x2000000004c3 = 0;
*(uint8_t*)0x2000000004c4 = 0;
*(uint8_t*)0x2000000004c5 = 1;
memcpy((void*)0x200000000440, "\x10\x00\x00\x00\x08\x02\x11\x00\x00\x01\x08\x02\x11\x00\x00\x00\x08\x02\x11\x00\x00\x00\x20\x00\x04\xa0\x00\x00\x0c\x00\x01", 31);
syz_80211_inject_frame(/*mac_addr=*/0x2000000004c0, /*buf=*/0x200000000440, /*buf_len=*/0x3c);
//  socket$nl_generic arguments: [
//    domain: const = 0x10 (8 bytes)
//    type: const = 0x3 (8 bytes)
//    proto: const = 0x10 (4 bytes)
//  ]
//  returns sock_nl_generic
	res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
	if (res != -1)
		r[6] = res;
//  ioctl$sock_SIOCGIFINDEX_80211 arguments: [
//    fd: sock (resource)
//    cmd: const = 0x8933 (4 bytes)
//    arg: ptr[out, ifreq_dev_t[nl80211_devnames, nl80211_ifindex]] {
//      ifreq_dev_t[nl80211_devnames, nl80211_ifindex] {
//        ifr_ifrn: buffer: {77 6c 61 6e 31 00 00 00 00 00 00 00 00 00 00 00} (length 0x10)
//        elem: nl80211_ifindex (resource)
//        pad = 0x0 (20 bytes)
//      }
//    }
//  ]
memcpy((void*)0x200000000240, "wlan1\000\000\000\000\000\000\000\000\000\000\000", 16);
	res = syscall(__NR_ioctl, /*fd=*/r[6], /*cmd=*/0x8933, /*arg=*/0x200000000240ul);
	if (res != -1)
r[7] = *(uint32_t*)0x200000000250;
//  syz_genetlink_get_family_id$nl80211 arguments: [
//    name: ptr[in, buffer] {
//      buffer: {6e 6c 38 30 32 31 31 00} (length 0x8)
//    }
//    fd: sock_nl_generic (resource)
//  ]
//  returns nl80211_family_id
memcpy((void*)0x200000000380, "nl80211\000", 8);
	res = -1;
res = syz_genetlink_get_family_id(/*name=*/0x200000000380, /*fd=*/-1);
	if (res != -1)
		r[8] = res;
//  sendmsg$NL80211_CMD_TDLS_MGMT arguments: [
//    fd: sock_nl_generic (resource)
//    msg: ptr[in, msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_TDLS_MGMT, nl80211_wdev_payload], nl80211_policy$tdls_mgmt]]] {
//      msghdr_netlink[netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_TDLS_MGMT, nl80211_wdev_payload], nl80211_policy$tdls_mgmt]] {
//        addr: nil
//        addrlen: len = 0x0 (4 bytes)
//        pad = 0x0 (4 bytes)
//        vec: ptr[in, iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_TDLS_MGMT, nl80211_wdev_payload], nl80211_policy$tdls_mgmt]]] {
//          iovec[in, netlink_msg_t[nl80211_family_id, msg_nl80211_payload[NL80211_CMD_TDLS_MGMT, nl80211_wdev_payload], nl80211_policy$tdls_mgmt]] {
//            addr: ptr[inout, array[ANYUNION]] {
//              array[ANYUNION] {
//                union ANYUNION {
//                  ANYBLOB: buffer: {98 00 00 00} (length 0x4)
//                }
//                union ANYUNION {
//                  ANYRES16: ANYRES16 (resource)
//                }
//                union ANYUNION {
//                  ANYBLOB: buffer: {01 00 00 00 00 00 00 00 00 00 52 00 00 00 08 00 03 00} (length 0x12)
//                }
//                union ANYUNION {
//                  ANYRES32: ANYRES32 (resource)
//                }
//                union ANYUNION {
//                  ANYBLOB: buffer: {06 00 48 00 00 00 00 00 0a 00 06 00 08 02 80 58 5c 8c 00 00 05 00 88 00 02 00 00 00 58 00 2a 00 37 52 00 00 62 ec b7 73 0d ee fe 2f c8 35 3f 15 7e 03 9f b4 12 74 0b 5d b1 3d 0d 69 8b 68 e5 5e 57 8a f5 49 95 2f 0a 25 31 d2 dd a9 99 16 9c 51 61 1e bb 52 f8 0c 2f 2f 66 04 9b d0 69 ed 4d a1 3a 2e db ae 15 c1 55 41 a3 bc 8d d3 2e 92 16 bd 65 68 ff db 05 00 89 00 00 00 00 00} (length 0x7c)
//                }
//              }
//            }
//            len: len = 0x98 (8 bytes)
//          }
//        }
//        vlen: const = 0x1 (8 bytes)
//        ctrl: const = 0x0 (8 bytes)
//        ctrllen: const = 0x0 (8 bytes)
//        f: send_flags = 0x20000000 (4 bytes)
//        pad = 0x0 (4 bytes)
//      }
//    }
//    f: send_flags = 0x0 (8 bytes)
//  ]
*(uint64_t*)0x200000000000 = 0;
*(uint32_t*)0x200000000008 = 0;
*(uint64_t*)0x200000000010 = 0x200000000200;
*(uint64_t*)0x200000000200 = 0x200000000580;
memcpy((void*)0x200000000580, "\x98\x00\x00\x00", 4);
*(uint16_t*)0x200000000584 = r[8];
memcpy((void*)0x200000000586, "\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x52\x00\x00\x00\x08\x00\x03\x00", 18);
*(uint32_t*)0x200000000598 = r[7];
memcpy((void*)0x20000000059c, "... [truncated large byte array] ...", 124);
*(uint64_t*)0x200000000208 = 0x98;
*(uint64_t*)0x200000000018 = 1;
*(uint64_t*)0x200000000020 = 0;
*(uint64_t*)0x200000000028 = 0;
*(uint32_t*)0x200000000030 = 0x20000000;
	syscall(__NR_sendmsg, /*fd=*/r[6], /*msg=*/0x200000000000ul, /*f=*/0ul);
	return 0;
}

I have carefully analyzed the provided kernel bug report, the syzkaller reproducer, and the relevant source code in `net/mac80211/tdls.c` and `net/wireless/nl80211.c`.

### Bug Analysis
The bug is a `WARN_ON_ONCE` triggered in the function `ieee80211_tdls_add_setup_cfm_ies()` located in `net/mac80211/tdls.c`. 

```c
sta = sta_info_get(sdata, peer);
ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);

if (WARN_ON_ONCE(!sta || !ap_sta))
    return;
```

This warning occurs when the kernel attempts to construct a TDLS (Tunneled Direct Link Setup) Setup Confirm frame, but it cannot find the station information (`sta_info`) for either the target peer or the associated Access Point (AP). 

### Reachability and Privileges
The function `ieee80211_tdls_add_setup_cfm_ies()` is reachable via the `NL80211_CMD_TDLS_MGMT` netlink command when the action code is set to `WLAN_TDLS_SETUP_CONFIRM`. 

Looking at the netlink command registration in `net/wireless/nl80211.c`:
```c
{
    .cmd = NL80211_CMD_TDLS_MGMT,
    .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
    .doit = nl80211_tdls_mgmt,
    .flags = GENL_UNS_ADMIN_PERM,
}
```
The `GENL_UNS_ADMIN_PERM` flag indicates that this command requires `CAP_NET_ADMIN` privileges within the user namespace that owns the network namespace. Therefore, an unprivileged user cannot trigger this bug in the initial namespace, but they can trigger it if they create a new user and network namespace (e.g., using `unshare -un`).

### Remote Triggerability
There is no path to trigger this warning remotely. TDLS management frames received over the air are passed up to userspace (e.g., `wpa_supplicant`) for processing. The kernel does not automatically generate TDLS Setup Confirm frames in response to remote traffic. The only way to reach this code path is via the local `NL80211_CMD_TDLS_MGMT` netlink command.

### Security Impact
*   **Exploitable**: **False**. The bug is a simple state validation check. If the required station information is missing, the code emits a warning and safely returns early (`return;`). There is no memory corruption, use-after-free, out-of-bounds access, or uninitialized memory usage.
*   **Denial of Service**: **False**. The `WARN_ON_ONCE` macro ensures that the warning is only printed once per boot, preventing log flooding. It does not crash the system or cause deadlocks. Even if the system is configured with `panic_on_warn=1`, the requirement for `CAP_NET_ADMIN` (even in a user namespace) significantly lowers the severity, as the attacker is only affecting their own isolated environment or requires privileges to affect the host.

### Conclusion
This is a benign warning caused by a lack of state validation in the `NL80211_CMD_TDLS_MGMT` handler before attempting to build a specific TDLS frame. It is not exploitable and does not pose a significant security risk.

gemini-3.1-pro-preview

							input: 20440
							output: 21
							thoughts: 545
						

**Analyzing a TDLS Bug Report**

Okay, so we have a kernel bug report involving `mac80211_hwsim`, which is always interesting. The critical part is the warning at `net/mac80211/tdls.c:611`. TDLS, or Tunneled Direct Link Setup, is a core part of 802.11 wireless functionality. Seeing warnings at this level is never a good sign, especially when dealing with such foundational wireless capabilities.

The report also mentions that the error triggers when switching to the perfect channel medium, which could give us a clue that the issue could be with how TDLS interacts with the emulated environment. `!sta || !ap_sta` suggests a condition failing related to station or access point information, and with the context being wireless, the immediate thought is related to wireless states.

The call trace indicates that the problem originates in `nl80211_tdls_mgmt`, which is the Netlink interface for managing TDLS. From there, it dives into the internals of the TDLS setup process, specifically around preparing and building management packets. Line 611 seems to be the culprit. I need to examine the context of this warning. I'll need to go to `net/mac80211/tdls.c:611` and check the surrounding code. My immediate hunch is that the code expects valid station or access point information, and the switch to the perfect channel medium somehow causes these checks to fail.

map[Expression:!sta || !ap_sta]

map[Output:
Full output is too long, showing 500 out of 42348457 lines.
Use more precise expression if possible.

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 .clang-format:195:  - 'drm_mm_for_each_node'
 .clang-format:196:  - 'drm_mm_for_each_node_in_range'
 .clang-format:197:  - 'drm_mm_for_each_node_safe'
 .clang-format:198:  - 'dsa_switch_for_each_available_port'
 .clang-format:199:  - 'dsa_switch_for_each_cpu_port'
 .clang-format:200:  - 'dsa_switch_for_each_cpu_port_continue_reverse'
 .clang-format:201:  - 'dsa_switch_for_each_port'
 .clang-format:202:  - 'dsa_switch_for_each_port_continue_reverse'
 .clang-format:203:  - 'dsa_switch_for_each_port_safe'
 .clang-format:204:  - 'dsa_switch_for_each_user_port'
 .clang-format:205:  - 'dsa_switch_for_each_user_port_continue_reverse'
 .clang-format:206:  - 'dsa_tree_for_each_cpu_port'
 .clang-format:207:  - 'dsa_tree_for_each_user_port'
 .clang-format:208:  - 'dsa_tree_for_each_user_port_continue_reverse'
 .clang-format:209:  - 'dso__for_each_symbol'
 .clang-format:210:  - 'elf_hash_for_each_possible'
 .clang-format:211:  - 'elf_symtab__for_each_symbol'
 .clang-format:212:  - 'evlist__for_each_cpu'
 .clang-format:213:  - 'evlist__for_each_entry'
 .clang-format:214:  - 'evlist__for_each_entry_continue'
 .clang-format:215:  - 'evlist__for_each_entry_from'
 .clang-format:216:  - 'evlist__for_each_entry_reverse'
 .clang-format:217:  - 'evlist__for_each_entry_safe'
 .clang-format:218:  - 'flow_action_for_each'
 .clang-format:219:  - 'for_each_acpi_consumer_dev'
 .clang-format:220:  - 'for_each_acpi_dev_match'
 .clang-format:221:  - 'for_each_active_dev_scope'
 .clang-format:222:  - 'for_each_active_drhd_unit'
 .clang-format:223:  - 'for_each_active_iommu'
 .clang-format:224:  - 'for_each_active_irq'
 .clang-format:225:  - 'for_each_active_route'
 .clang-format:226:  - 'for_each_aggr_pgid'
 .clang-format:227:  - 'for_each_alloc_capable_rdt_resource'
 .clang-format:228:  - 'for_each_and_bit'
 .clang-format:229:  - 'for_each_andnot_bit'
 .clang-format:230:  - 'for_each_available_child_of_node'
 .clang-format:231:  - 'for_each_available_child_of_node_scoped'
 .clang-format:232:  - 'for_each_bench'
 .clang-format:233:  - 'for_each_bio'
 .clang-format:234:  - 'for_each_board_func_rsrc'
 .clang-format:235:  - 'for_each_btf_ext_rec'
 .clang-format:236:  - 'for_each_btf_ext_sec'
 .clang-format:237:  - 'for_each_bvec'
 .clang-format:238:  - 'for_each_capable_rdt_resource'
 .clang-format:239:  - 'for_each_card_auxs'
 .clang-format:240:  - 'for_each_card_auxs_safe'
 .clang-format:241:  - 'for_each_card_components'
 .clang-format:242:  - 'for_each_card_dapms'
 .clang-format:243:  - 'for_each_card_pre_auxs'
 .clang-format:244:  - 'for_each_card_prelinks'
 .clang-format:245:  - 'for_each_card_rtds'
 .clang-format:246:  - 'for_each_card_rtds_safe'
 .clang-format:247:  - 'for_each_card_widgets'
 .clang-format:248:  - 'for_each_card_widgets_safe'
 .clang-format:249:  - 'for_each_cgroup_storage_type'
 .clang-format:250:  - 'for_each_child_of_node'
 .clang-format:251:  - 'for_each_child_of_node_scoped'
 .clang-format:252:  - 'for_each_child_of_node_with_prefix'
 .clang-format:253:  - 'for_each_clear_bit'
 .clang-format:254:  - 'for_each_clear_bit_from'
 .clang-format:255:  - 'for_each_clear_bitrange'
 .clang-format:256:  - 'for_each_clear_bitrange_from'
 .clang-format:257:  - 'for_each_cmd'
 .clang-format:258:  - 'for_each_cmsghdr'
 .clang-format:259:  - 'for_each_collection'
 .clang-format:260:  - 'for_each_comp_order'
 .clang-format:261:  - 'for_each_compatible_node'
 .clang-format:262:  - 'for_each_compatible_node_scoped'
 .clang-format:263:  - 'for_each_component_dais'
 .clang-format:264:  - 'for_each_component_dais_safe'
 .clang-format:265:  - 'for_each_conduit'
 .clang-format:266:  - 'for_each_console'
 .clang-format:267:  - 'for_each_console_srcu'
 .clang-format:268:  - 'for_each_cpu'
 .clang-format:269:  - 'for_each_cpu_and'
 .clang-format:270:  - 'for_each_cpu_andnot'
 .clang-format:271:  - 'for_each_cpu_from'
 .clang-format:272:  - 'for_each_cpu_or'
 .clang-format:273:  - 'for_each_cpu_wrap'
 .clang-format:274:  - 'for_each_dapm_widgets'
 .clang-format:275:  - 'for_each_dedup_cand'
 .clang-format:276:  - 'for_each_dev_addr'
 .clang-format:277:  - 'for_each_dev_scope'
 .clang-format:278:  - 'for_each_dma_cap_mask'
 .clang-format:279:  - 'for_each_dpcm_be'
 .clang-format:280:  - 'for_each_dpcm_be_rollback'
 .clang-format:281:  - 'for_each_dpcm_be_safe'
 .clang-format:282:  - 'for_each_dpcm_fe'
 .clang-format:283:  - 'for_each_drhd_unit'
 .clang-format:284:  - 'for_each_dss_dev'
 .clang-format:285:  - 'for_each_efi_memory_desc'
 .clang-format:286:  - 'for_each_efi_memory_desc_in_map'
 .clang-format:287:  - 'for_each_element'
 .clang-format:288:  - 'for_each_element_extid'
 .clang-format:289:  - 'for_each_element_id'
 .clang-format:290:  - 'for_each_enabled_cpu'
 .clang-format:291:  - 'for_each_endpoint_of_node'
 .clang-format:292:  - 'for_each_event'
 .clang-format:293:  - 'for_each_event_tps'
 .clang-format:294:  - 'for_each_evictable_lru'
 .clang-format:295:  - 'for_each_fib6_node_rt_rcu'
 .clang-format:296:  - 'for_each_fib6_walker_rt'
 .clang-format:297:  - 'for_each_file_lock'
 .clang-format:298:  - 'for_each_free_mem_range'
 .clang-format:299:  - 'for_each_free_mem_range_reverse'
 .clang-format:300:  - 'for_each_func_rsrc'
 .clang-format:301:  - 'for_each_gpiochip_node'
 .clang-format:302:  - 'for_each_group_evsel'
 .clang-format:303:  - 'for_each_group_evsel_head'
 .clang-format:304:  - 'for_each_group_member'
 .clang-format:305:  - 'for_each_group_member_head'
 .clang-format:306:  - 'for_each_hstate'
 .clang-format:307:  - 'for_each_hwgpio'
 .clang-format:308:  - 'for_each_hwgpio_in_range'
 .clang-format:309:  - 'for_each_if'
 .clang-format:310:  - 'for_each_inject_fn'
 .clang-format:311:  - 'for_each_insn'
 .clang-format:312:  - 'for_each_insn_op_loc'
 .clang-format:313:  - 'for_each_insn_prefix'
 .clang-format:314:  - 'for_each_intid'
 .clang-format:315:  - 'for_each_iommu'
 .clang-format:316:  - 'for_each_ip_tunnel_rcu'
 .clang-format:317:  - 'for_each_irq_desc'
 .clang-format:318:  - 'for_each_irq_nr'
 .clang-format:319:  - 'for_each_lang'
 .clang-format:320:  - 'for_each_link_ch_maps'
 .clang-format:321:  - 'for_each_link_codecs'
 .clang-format:322:  - 'for_each_link_cpus'
 .clang-format:323:  - 'for_each_link_platforms'
 .clang-format:324:  - 'for_each_lru'
 .clang-format:325:  - 'for_each_matching_node'
 .clang-format:326:  - 'for_each_matching_node_and_match'
 .clang-format:327:  - 'for_each_media_entity_data_link'
 .clang-format:328:  - 'for_each_mem_pfn_range'
 .clang-format:329:  - 'for_each_mem_range'
 .clang-format:330:  - 'for_each_mem_range_rev'
 .clang-format:331:  - 'for_each_mem_region'
 .clang-format:332:  - 'for_each_member'
 .clang-format:333:  - 'for_each_memory'
 .clang-format:334:  - 'for_each_migratetype_order'
 .clang-format:335:  - 'for_each_missing_reg'
 .clang-format:336:  - 'for_each_mle_subelement'
 .clang-format:337:  - 'for_each_mod_mem_type'
 .clang-format:338:  - 'for_each_mon_capable_rdt_resource'
 .clang-format:339:  - 'for_each_mp_bvec'
 .clang-format:340:  - 'for_each_net'
 .clang-format:341:  - 'for_each_net_continue_reverse'
 .clang-format:342:  - 'for_each_net_rcu'
 .clang-format:343:  - 'for_each_netdev'
 .clang-format:344:  - 'for_each_netdev_continue'
 .clang-format:345:  - 'for_each_netdev_continue_rcu'
 .clang-format:346:  - 'for_each_netdev_continue_reverse'
 .clang-format:347:  - 'for_each_netdev_dump'
 .clang-format:348:  - 'for_each_netdev_feature'
 .clang-format:349:  - 'for_each_netdev_in_bond_rcu'
 .clang-format:350:  - 'for_each_netdev_rcu'
 .clang-format:351:  - 'for_each_netdev_reverse'
 .clang-format:352:  - 'for_each_netdev_safe'
 .clang-format:353:  - 'for_each_new_connector_in_state'
 .clang-format:354:  - 'for_each_new_crtc_in_state'
 .clang-format:355:  - 'for_each_new_mst_mgr_in_state'
 .clang-format:356:  - 'for_each_new_plane_in_state'
 .clang-format:357:  - 'for_each_new_plane_in_state_reverse'
 .clang-format:358:  - 'for_each_new_private_obj_in_state'
 .clang-format:359:  - 'for_each_new_reg'
 .clang-format:360:  - 'for_each_nhlt_endpoint'
 .clang-format:361:  - 'for_each_nhlt_endpoint_fmtcfg'
 .clang-format:362:  - 'for_each_nhlt_fmtcfg'
 .clang-format:363:  - 'for_each_node'
 .clang-format:364:  - 'for_each_node_by_name'
 .clang-format:365:  - 'for_each_node_by_type'
 .clang-format:366:  - 'for_each_node_mask'
 .clang-format:367:  - 'for_each_node_numadist'
 .clang-format:368:  - 'for_each_node_state'
 .clang-format:369:  - 'for_each_node_with_cpus'
 .clang-format:370:  - 'for_each_node_with_property'
 .clang-format:371:  - 'for_each_nonreserved_multicast_dest_pgid'
 .clang-format:372:  - 'for_each_numa_hop_mask'
 .clang-format:373:  - 'for_each_of_allnodes'
 .clang-format:374:  - 'for_each_of_allnodes_from'
 .clang-format:375:  - 'for_each_of_cpu_node'
 .clang-format:376:  - 'for_each_of_graph_port'
 .clang-format:377:  - 'for_each_of_graph_port_endpoint'
 .clang-format:378:  - 'for_each_of_pci_range'
 .clang-format:379:  - 'for_each_old_connector_in_state'
 .clang-format:380:  - 'for_each_old_crtc_in_state'
 .clang-format:381:  - 'for_each_old_mst_mgr_in_state'
 .clang-format:382:  - 'for_each_old_plane_in_state'
 .clang-format:383:  - 'for_each_old_private_obj_in_state'
 .clang-format:384:  - 'for_each_oldnew_connector_in_state'
 .clang-format:385:  - 'for_each_oldnew_crtc_in_state'
 .clang-format:386:  - 'for_each_oldnew_mst_mgr_in_state'
 .clang-format:387:  - 'for_each_oldnew_plane_in_state'
 .clang-format:388:  - 'for_each_oldnew_plane_in_state_reverse'
 .clang-format:389:  - 'for_each_oldnew_private_obj_in_state'
 .clang-format:390:  - 'for_each_online_cpu'
 .clang-format:391:  - 'for_each_online_cpu_wrap'
 .clang-format:392:  - 'for_each_online_node'
 .clang-format:393:  - 'for_each_online_pgdat'
 .clang-format:394:  - 'for_each_or_bit'
 .clang-format:395:  - 'for_each_page_ext'
 .clang-format:396:  - 'for_each_path'
 .clang-format:397:  - 'for_each_pci_bridge'
 .clang-format:398:  - 'for_each_pci_dev'
 .clang-format:399:  - 'for_each_pcm_streams'
 .clang-format:400:  - 'for_each_physmem_range'
 .clang-format:401:  - 'for_each_populated_zone'
 .clang-format:402:  - 'for_each_possible_cpu'
 .clang-format:403:  - 'for_each_possible_cpu_wrap'
 .clang-format:404:  - 'for_each_present_blessed_reg'
 .clang-format:405:  - 'for_each_present_cpu'
 .clang-format:406:  - 'for_each_present_section_nr'
 .clang-format:407:  - 'for_each_prime_number'
 .clang-format:408:  - 'for_each_prime_number_from'
 .clang-format:409:  - 'for_each_probe_cache_entry'
 .clang-format:410:  - 'for_each_process'
 .clang-format:411:  - 'for_each_process_thread'
 .clang-format:412:  - 'for_each_prop_codec_conf'
 .clang-format:413:  - 'for_each_prop_dai_codec'
 .clang-format:414:  - 'for_each_prop_dai_cpu'
 .clang-format:415:  - 'for_each_prop_dlc_codecs'
 .clang-format:416:  - 'for_each_prop_dlc_cpus'
 .clang-format:417:  - 'for_each_prop_dlc_platforms'
 .clang-format:418:  - 'for_each_property_of_node'
 .clang-format:419:  - 'for_each_pt_level_entry'
 .clang-format:420:  - 'for_each_rdt_resource'
 .clang-format:421:  - 'for_each_reg'
 .clang-format:422:  - 'for_each_reg_filtered'
 .clang-format:423:  - 'for_each_reloc'
 .clang-format:424:  - 'for_each_reloc_from'
 .clang-format:425:  - 'for_each_requested_gpio'
 .clang-format:426:  - 'for_each_requested_gpio_in_range'
 .clang-format:427:  - 'for_each_reserved_child_of_node'
 .clang-format:428:  - 'for_each_reserved_mem_range'
 .clang-format:429:  - 'for_each_reserved_mem_region'
 .clang-format:430:  - 'for_each_rtd_ch_maps'
 .clang-format:431:  - 'for_each_rtd_codec_dais'
 .clang-format:432:  - 'for_each_rtd_components'
 .clang-format:433:  - 'for_each_rtd_cpu_dais'
 .clang-format:434:  - 'for_each_rtd_dais'
 .clang-format:435:  - 'for_each_rtd_dais_reverse'
 .clang-format:436:  - 'for_each_sband_iftype_data'
 .clang-format:437:  - 'for_each_script'
 .clang-format:438:  - 'for_each_sec'
 .clang-format:439:  - 'for_each_set_bit'
 .clang-format:440:  - 'for_each_set_bit_from'
 .clang-format:441:  - 'for_each_set_bit_wrap'
 .clang-format:442:  - 'for_each_set_bitrange'
 .clang-format:443:  - 'for_each_set_bitrange_from'
 .clang-format:444:  - 'for_each_set_clump8'
 .clang-format:445:  - 'for_each_sg'
 .clang-format:446:  - 'for_each_sg_dma_page'
 .clang-format:447:  - 'for_each_sg_page'
 .clang-format:448:  - 'for_each_sgtable_dma_page'
 .clang-format:449:  - 'for_each_sgtable_dma_sg'
 .clang-format:450:  - 'for_each_sgtable_page'
 .clang-format:451:  - 'for_each_sgtable_sg'
 .clang-format:452:  - 'for_each_sibling_event'
 .clang-format:453:  - 'for_each_sta_active_link'
 .clang-format:454:  - 'for_each_subelement'
 .clang-format:455:  - 'for_each_subelement_extid'
 .clang-format:456:  - 'for_each_subelement_id'
 .clang-format:457:  - 'for_each_sublist'
 .clang-format:458:  - 'for_each_subsystem'
 .clang-format:459:  - 'for_each_suite'
 .clang-format:460:  - 'for_each_supported_activate_fn'
 .clang-format:461:  - 'for_each_supported_inject_fn'
 .clang-format:462:  - 'for_each_sym'
 .clang-format:463:  - 'for_each_thread'
 .clang-format:464:  - 'for_each_token'
 .clang-format:465:  - 'for_each_unicast_dest_pgid'
 .clang-format:466:  - 'for_each_valid_link'
 .clang-format:467:  - 'for_each_vif_active_link'
 .clang-format:468:  - 'for_each_vma'
 .clang-format:469:  - 'for_each_vma_range'
 .clang-format:470:  - 'for_each_vsi'
 .clang-format:471:  - 'for_each_wakeup_source'
 .clang-format:472:  - 'for_each_zone'
 .clang-format:473:  - 'for_each_zone_zonelist'
 .clang-format:474:  - 'for_each_zone_zonelist_nodemask'
 .clang-format:475:  - 'func_for_each_insn'
 .clang-format:476:  - 'fwnode_for_each_available_child_node'
 .clang-format:477:  - 'fwnode_for_each_child_node'
 .clang-format:478:  - 'fwnode_for_each_parent_node'
 .clang-format:479:  - 'fwnode_graph_for_each_endpoint'
 .clang-format:480:  - 'gadget_for_each_ep'
 .clang-format:481:  - 'genradix_for_each'
 .clang-format:482:  - 'genradix_for_each_from'
 .clang-format:483:  - 'genradix_for_each_reverse'
 .clang-format:484:  - 'hash_for_each'
 .clang-format:485:  - 'hash_for_each_possible'
 .clang-format:486:  - 'hash_for_each_possible_rcu'
 .clang-format:487:  - 'hash_for_each_possible_rcu_notrace'
 .clang-format:488:  - 'hash_for_each_possible_safe'
 .clang-format:489:  - 'hash_for_each_rcu'
 .clang-format:490:  - 'hash_for_each_safe'
 .clang-format:491:  - 'hashmap__for_each_entry'
 .clang-format:492:  - 'hashmap__for_each_entry_safe'
 .clang-format:493:  - 'hashmap__for_each_key_entry'
 .clang-format:494:  - 'hashmap__for_each_key_entry_safe'
 .clang-format:495:  - 'hctx_for_each_ctx'
 .clang-format:496:  - 'hists__for_each_format'
 .clang-format:497:  - 'hists__for_each_sort_list'
 .clang-format:498:  - 'hlist_bl_for_each_entry'
 .clang-format:499:  - 'hlist_bl_for_each_entry_rcu'
 .clang-format:500:  - 'hlist_bl_for_each_entry_safe'
]
]

gemini-3.1-pro-preview

							input: 31881
							output: 32
							thoughts: 89
						

Here's my analysis of the situation:

**Investigating a TDLS Warning in mac80211**

Okay, so I've got a bug report highlighting a WARNING in the `net/mac80211/tdls.c` file, specifically at line 611 within the `ieee80211_tdls_add_setup_cfm_ies` function. The warning condition itself is straightforward: it triggers when either `!sta` or `!ap_sta` evaluates to true. That suggests a missing or invalid STA (station) or AP STA (access point station) pointer, respectively, are the root cause. This is a common situation with wireless drivers, so it's a good starting point for investigation. The next logical step is to dive into the code at line 611 and surrounding areas to understand the context and how these STA pointers are handled. From there, I can determine why one or both might be unexpectedly NULL, and what the implications of that state are in the TDLS setup confirmation process.

map[Expression:ieee80211_tdls_add_setup_cfm_ies]

map[Output:net/mac80211/tdls.c=591=static void
net/mac80211/tdls.c:592:ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
net/mac80211/tdls.c-593-				 struct sk_buff *skb, const u8 *peer,
--
net/mac80211/tdls.c=741=static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
--
net/mac80211/tdls.c-761-		if (status_code == 0)
net/mac80211/tdls.c:762:			ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
net/mac80211/tdls.c-763-							 initiator, extra_ies,
]

gemini-3.1-pro-preview

							input: 32414
							output: 28
							thoughts: 0
						

map[File:net/mac80211/tdls.c]

map[Contents:// SPDX-License-Identifier: GPL-2.0-only
/*
 * mac80211 TDLS handling code
 *
 * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2014, Intel Corporation
 * Copyright 2014  Intel Mobile Communications GmbH
 * Copyright 2015 - 2016 Intel Deutschland GmbH
 * Copyright (C) 2019, 2021-2025 Intel Corporation
 */

#include <linux/ieee80211.h>
#include <linux/log2.h>
#include <net/cfg80211.h>
#include <linux/rtnetlink.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "wme.h"

/* give usermode some time for retries in setting up the TDLS session */
#define TDLS_PEER_SETUP_TIMEOUT	(15 * HZ)

void ieee80211_tdls_peer_del_work(struct wiphy *wiphy, struct wiphy_work *wk)
{
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_local *local;

	sdata = container_of(wk, struct ieee80211_sub_if_data,
			     u.mgd.tdls_peer_del_work.work);
	local = sdata->local;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) {
		tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer);
		sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer);
		eth_zero_addr(sdata->u.mgd.tdls_peer);
	}
}

static void ieee80211_tdls_add_ext_capab(struct ieee80211_link_data *link,
					 struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	bool chan_switch = local->hw.wiphy->features &
			   NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
	bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
			  !ifmgd->tdls_wider_bw_prohibited;
	bool buffer_sta = ieee80211_hw_check(&local->hw,
					     SUPPORTS_TDLS_BUFFER_STA);
	struct ieee80211_supported_band *sband = ieee80211_get_link_sband(link);
	bool vht = sband && sband->vht_cap.vht_supported;
	u8 *pos = skb_put(skb, 10);

	*pos++ = WLAN_EID_EXT_CAPABILITY;
	*pos++ = 8; /* len */
	*pos++ = 0x0;
	*pos++ = 0x0;
	*pos++ = 0x0;
	*pos++ = (chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0) |
		 (buffer_sta ? WLAN_EXT_CAPA4_TDLS_BUFFER_STA : 0);
	*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
	*pos++ = 0;
	*pos++ = 0;
	*pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0;
}

static u8
ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata,
			   struct sk_buff *skb, u16 start, u16 end,
			   u16 spacing)
{
	u8 subband_cnt = 0, ch_cnt = 0;
	struct ieee80211_channel *ch;
	struct cfg80211_chan_def chandef;
	int i, subband_start;
	struct wiphy *wiphy = sdata->local->hw.wiphy;

	for (i = start; i <= end; i += spacing) {
		if (!ch_cnt)
			subband_start = i;

		ch = ieee80211_get_channel(sdata->local->hw.wiphy, i);
		if (ch) {
			/* we will be active on the channel */
			cfg80211_chandef_create(&chandef, ch,
						NL80211_CHAN_NO_HT);
			if (cfg80211_reg_can_beacon_relax(wiphy, &chandef,
							  sdata->wdev.iftype)) {
				ch_cnt++;
				/*
				 * check if the next channel is also part of
				 * this allowed range
				 */
				continue;
			}
		}

		/*
		 * we've reached the end of a range, with allowed channels
		 * found
		 */
		if (ch_cnt) {
			u8 *pos = skb_put(skb, 2);
			*pos++ = ieee80211_frequency_to_channel(subband_start);
			*pos++ = ch_cnt;

			subband_cnt++;
			ch_cnt = 0;
		}
	}

	/* all channels in the requested range are allowed - add them here */
	if (ch_cnt) {
		u8 *pos = skb_put(skb, 2);
		*pos++ = ieee80211_frequency_to_channel(subband_start);
		*pos++ = ch_cnt;

		subband_cnt++;
	}

	return subband_cnt;
}

static void
ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata,
				 struct sk_buff *skb)
{
	/*
	 * Add possible channels for TDLS. These are channels that are allowed
	 * to be active.
	 */
	u8 subband_cnt;
	u8 *pos = skb_put(skb, 2);

	*pos++ = WLAN_EID_SUPPORTED_CHANNELS;

	/*
	 * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as
	 * this doesn't happen in real world scenarios.
	 */

	/* 2GHz, with 5MHz spacing */
	subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5);

	/* 5GHz, with 20MHz spacing */
	subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20);

	/* length */
	*pos = 2 * subband_cnt;
}

static void ieee80211_tdls_add_oper_classes(struct ieee80211_link_data *link,
					    struct sk_buff *skb)
{
	u8 *pos;
	u8 op_class;

	if (!ieee80211_chandef_to_operating_class(&link->conf->chanreq.oper,
						  &op_class))
		return;

	pos = skb_put(skb, 4);
	*pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES;
	*pos++ = 2; /* len */

	*pos++ = op_class;
	*pos++ = op_class; /* give current operating class as alternate too */
}

static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb)
{
	u8 *pos = skb_put(skb, 3);

	*pos++ = WLAN_EID_BSS_COEX_2040;
	*pos++ = 1; /* len */

	*pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST;
}

static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_link_data *link,
					u16 status_code)
{
	struct ieee80211_supported_band *sband;

	/* The capability will be 0 when sending a failure code */
	if (status_code != 0)
		return 0;

	sband = ieee80211_get_link_sband(link);

	if (sband && sband->band == NL80211_BAND_2GHZ) {
		return WLAN_CAPABILITY_SHORT_SLOT_TIME |
		       WLAN_CAPABILITY_SHORT_PREAMBLE;
	}

	return 0;
}

static void ieee80211_tdls_add_link_ie(struct ieee80211_link_data *link,
				       struct sk_buff *skb, const u8 *peer,
				       bool initiator)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_tdls_lnkie *lnkid;
	const u8 *init_addr, *rsp_addr;

	if (initiator) {
		init_addr = sdata->vif.addr;
		rsp_addr = peer;
	} else {
		init_addr = peer;
		rsp_addr = sdata->vif.addr;
	}

	lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));

	lnkid->ie_type = WLAN_EID_LINK_ID;
	lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;

	memcpy(lnkid->bssid, link->u.mgd.bssid, ETH_ALEN);
	memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
	memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
}

static void
ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
{
	u8 *pos = skb_put(skb, 4);

	*pos++ = WLAN_EID_AID;
	*pos++ = 2; /* len */
	put_unaligned_le16(sdata->vif.cfg.aid, pos);
}

/* translate numbering in the WMM parameter IE to the mac80211 notation */
static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac)
{
	switch (ac) {
	default:
		WARN_ON_ONCE(1);
		fallthrough;
	case 0:
		return IEEE80211_AC_BE;
	case 1:
		return IEEE80211_AC_BK;
	case 2:
		return IEEE80211_AC_VI;
	case 3:
		return IEEE80211_AC_VO;
	}
}

static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci)
{
	u8 ret;

	ret = aifsn & 0x0f;
	if (acm)
		ret |= 0x10;
	ret |= (aci << 5) & 0x60;
	return ret;
}

static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max)
{
	return ((ilog2(cw_min + 1) << 0x0) & 0x0f) |
	       ((ilog2(cw_max + 1) << 0x4) & 0xf0);
}

static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata,
					    struct sk_buff *skb)
{
	struct ieee80211_wmm_param_ie *wmm;
	struct ieee80211_tx_queue_params *txq;
	int i;

	wmm = skb_put_zero(skb, sizeof(*wmm));

	wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
	wmm->len = sizeof(*wmm) - 2;

	wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
	wmm->oui[1] = 0x50;
	wmm->oui[2] = 0xf2;
	wmm->oui_type = 2; /* WME */
	wmm->oui_subtype = 1; /* WME param */
	wmm->version = 1; /* WME ver */
	wmm->qos_info = 0; /* U-APSD not in use */

	/*
	 * Use the EDCA parameters defined for the BSS, or default if the AP
	 * doesn't support it, as mandated by 802.11-2012 section 10.22.4
	 */
	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
		txq = &sdata->deflink.tx_conf[ieee80211_ac_from_wmm(i)];
		wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs,
							       txq->acm, i);
		wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max);
		wmm->ac[i].txop_limit = cpu_to_le16(txq->txop);
	}
}

static void
ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata,
				   struct sta_info *sta)
{
	/* IEEE802.11ac-2013 Table E-4 */
	static const u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 };
	struct cfg80211_chan_def uc = sta->tdls_chandef;
	enum nl80211_chan_width max_width =
		ieee80211_sta_cap_chan_bw(&sta->deflink);
	int i;

	/* only support upgrading non-narrow channels up to 80Mhz */
	if (max_width == NL80211_CHAN_WIDTH_5 ||
	    max_width == NL80211_CHAN_WIDTH_10)
		return;

	if (max_width > NL80211_CHAN_WIDTH_80)
		max_width = NL80211_CHAN_WIDTH_80;

	if (uc.width >= max_width)
		return;
	/*
	 * Channel usage constrains in the IEEE802.11ac-2013 specification only
	 * allow expanding a 20MHz channel to 80MHz in a single way. In
	 * addition, there are no 40MHz allowed channels that are not part of
	 * the allowed 80MHz range in the 5GHz spectrum (the relevant one here).
	 */
	for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++)
		if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) {
			uc.center_freq1 = centers_80mhz[i];
			uc.center_freq2 = 0;
			uc.width = NL80211_CHAN_WIDTH_80;
			break;
		}

	if (!uc.center_freq1)
		return;

	/* proceed to downgrade the chandef until usable or the same as AP BW */
	while (uc.width > max_width ||
	       (uc.width > sta->tdls_chandef.width &&
		!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &uc,
					       sdata->wdev.iftype)))
		ieee80211_chandef_downgrade(&uc, NULL);

	if (!cfg80211_chandef_identical(&uc, &sta->tdls_chandef)) {
		tdls_dbg(sdata, "TDLS ch width upgraded %d -> %d\n",
			 sta->tdls_chandef.width, uc.width);

		/*
		 * the station is not yet authorized when BW upgrade is done,
		 * locking is not required
		 */
		sta->tdls_chandef = uc;
	}
}

static void
ieee80211_tdls_add_setup_start_ies(struct ieee80211_link_data *link,
				   struct sk_buff *skb, const u8 *peer,
				   u8 action_code, bool initiator,
				   const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_supported_band *sband;
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_sta_ht_cap ht_cap;
	struct ieee80211_sta_vht_cap vht_cap;
	const struct ieee80211_sta_he_cap *he_cap;
	const struct ieee80211_sta_eht_cap *eht_cap;
	struct sta_info *sta = NULL;
	size_t offset = 0, noffset;
	u8 *pos;

	sband = ieee80211_get_link_sband(link);
	if (WARN_ON_ONCE(!sband))
		return;

	ieee80211_put_srates_elem(skb, sband, 0, 0, WLAN_EID_SUPP_RATES);
	ieee80211_put_srates_elem(skb, sband, 0, 0, WLAN_EID_EXT_SUPP_RATES);
	ieee80211_tdls_add_supp_channels(sdata, skb);

	/* add any custom IEs that go before Extended Capabilities */
	if (extra_ies_len) {
		static const u8 before_ext_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ext_cap,
					     ARRAY_SIZE(before_ext_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	ieee80211_tdls_add_ext_capab(link, skb);

	/* add the QoS element if we support it */
	if (local->hw.queues >= IEEE80211_NUM_ACS &&
	    action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
		ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */

	/* add any custom IEs that go before HT capabilities */
	if (extra_ies_len) {
		static const u8 before_ht_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ht_cap,
					     ARRAY_SIZE(before_ht_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* we should have the peer STA if we're already responding */
	if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
		sta = sta_info_get(sdata, peer);
		if (WARN_ON_ONCE(!sta))
			return;

		sta->tdls_chandef = link->conf->chanreq.oper;
	}

	ieee80211_tdls_add_oper_classes(link, skb);

	/*
	 * with TDLS we can switch channels, and HT-caps are not necessarily
	 * the same on all bands. The specification limits the setup to a
	 * single HT-cap, so use the current band for now.
	 */
	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));

	if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
	    ht_cap.ht_supported) {
		ieee80211_apply_htcap_overrides(sdata, &ht_cap);

		/* disable SMPS in TDLS initiator */
		ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
				<< IEEE80211_HT_CAP_SM_PS_SHIFT;

		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
		ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
	} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
		   ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
		/* the peer caps are already intersected with our own */
		memcpy(&ht_cap, &sta->sta.deflink.ht_cap, sizeof(ht_cap));

		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
		ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
	}

	if (ht_cap.ht_supported &&
	    (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
		ieee80211_tdls_add_bss_coex_ie(skb);

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* add any custom IEs that go before VHT capabilities */
	if (extra_ies_len) {
		static const u8 before_vht_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_MULTI_BAND,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_vht_cap,
					     ARRAY_SIZE(before_vht_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* add AID if VHT, HE or EHT capabilities supported */
	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
	he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
	eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
	if ((vht_cap.vht_supported || he_cap || eht_cap) &&
	    (action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_TDLS_SETUP_RESPONSE))
		ieee80211_tdls_add_aid(sdata, skb);

	/* build the VHT-cap similarly to the HT-cap */
	if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
	    vht_cap.vht_supported) {
		ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);

		pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
		ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
	} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
		   vht_cap.vht_supported && sta->sta.deflink.vht_cap.vht_supported) {
		/* the peer caps are already intersected with our own */
		memcpy(&vht_cap, &sta->sta.deflink.vht_cap, sizeof(vht_cap));

		pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
		ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);

		/*
		 * if both peers support WIDER_BW, we can expand the chandef to
		 * a wider compatible one, up to 80MHz
		 */
		if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
	}

	/* add any custom IEs that go before HE capabilities */
	if (extra_ies_len) {
		static const u8 before_he_cap[] = {
			WLAN_EID_EXTENSION,
			WLAN_EID_EXT_FILS_REQ_PARAMS,
			WLAN_EID_AP_CSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_he_cap,
					     ARRAY_SIZE(before_he_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* build the HE-cap from sband */
	if (action_code == WLAN_TDLS_SETUP_REQUEST ||
	    action_code == WLAN_TDLS_SETUP_RESPONSE ||
	    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
		ieee80211_put_he_cap(skb, sdata, sband, NULL);

		/* Build HE 6Ghz capa IE from sband */
		if (sband->band == NL80211_BAND_6GHZ)
			ieee80211_put_he_6ghz_cap(skb, sdata, link->smps_mode);
	}

	/* add any custom IEs that go before EHT capabilities */
	if (extra_ies_len) {
		static const u8 before_he_cap[] = {
			WLAN_EID_EXTENSION,
			WLAN_EID_EXT_FILS_REQ_PARAMS,
			WLAN_EID_AP_CSN,
		};

		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_he_cap,
					     ARRAY_SIZE(before_he_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* build the EHT-cap from sband */
	if (action_code == WLAN_TDLS_SETUP_REQUEST ||
	    action_code == WLAN_TDLS_SETUP_RESPONSE ||
	    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
		ieee80211_put_eht_cap(skb, sdata, sband, NULL);

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}

}

static void
ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
				 struct sk_buff *skb, const u8 *peer,
				 bool initiator, const u8 *extra_ies,
				 size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_local *local = sdata->local;
	size_t offset = 0, noffset;
	struct sta_info *sta, *ap_sta;
	struct ieee80211_supported_band *sband;
	u8 *pos;

	sband = ieee80211_get_link_sband(link);
	if (WARN_ON_ONCE(!sband))
		return;

	sta = sta_info_get(sdata, peer);
	ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);

	if (WARN_ON_ONCE(!sta || !ap_sta))
		return;

	sta->tdls_chandef = link->conf->chanreq.oper;

	/* add any custom IEs that go before the QoS IE */
	if (extra_ies_len) {
		static const u8 before_qos[] = {
			WLAN_EID_RSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_qos,
					     ARRAY_SIZE(before_qos),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* add the QoS param IE if both the peer and we support it */
	if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
		ieee80211_tdls_add_wmm_param_ie(sdata, skb);

	/* add any custom IEs that go before HT operation */
	if (extra_ies_len) {
		static const u8 before_ht_op[] = {
			WLAN_EID_RSN,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ht_op,
					     ARRAY_SIZE(before_ht_op),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/*
	 * if HT support is only added in TDLS, we need an HT-operation IE.
	 * add the IE as required by IEEE802.11-2012 9.23.3.2.
	 */
	if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
		u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
			   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
			   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;

		pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
		ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
					   &link->conf->chanreq.oper, prot,
					   true);
	}

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* only include VHT-operation if not on the 2.4GHz band */
	if (sband->band != NL80211_BAND_2GHZ &&
	    sta->sta.deflink.vht_cap.vht_supported) {
		/*
		 * if both peers support WIDER_BW, we can expand the chandef to
		 * a wider compatible one, up to 80MHz
		 */
		if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);

		pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
		ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
					    &sta->tdls_chandef);
	}

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}
}

static void
ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_link_data *link,
				       struct sk_buff *skb, const u8 *peer,
				       bool initiator, const u8 *extra_ies,
				       size_t extra_ies_len, u8 oper_class,
				       struct cfg80211_chan_def *chandef)
{
	struct ieee80211_tdls_data *tf;
	size_t offset = 0, noffset;

	if (WARN_ON_ONCE(!chandef))
		return;

	tf = (void *)skb->data;
	tf->u.chan_switch_req.target_channel =
		ieee80211_frequency_to_channel(chandef->chan->center_freq);
	tf->u.chan_switch_req.oper_class = oper_class;

	if (extra_ies_len) {
		static const u8 before_lnkie[] = {
			WLAN_EID_SECONDARY_CHANNEL_OFFSET,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_lnkie,
					     ARRAY_SIZE(before_lnkie),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}
}

static void
ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_link_data *link,
					struct sk_buff *skb, const u8 *peer,
					u16 status_code, bool initiator,
					const u8 *extra_ies,
					size_t extra_ies_len)
{
	if (status_code == 0)
		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	if (extra_ies_len)
		skb_put_data(skb, extra_ies, extra_ies_len);
}

static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
				   struct sk_buff *skb, const u8 *peer,
				   u8 action_code, u16 status_code,
				   bool initiator, const u8 *extra_ies,
				   size_t extra_ies_len, u8 oper_class,
				   struct cfg80211_chan_def *chandef)
{
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		if (status_code == 0)
			ieee80211_tdls_add_setup_start_ies(link,
							   skb, peer,
							   action_code,
							   initiator,
							   extra_ies,
							   extra_ies_len);
		break;
	case WLAN_TDLS_SETUP_CONFIRM:
		if (status_code == 0)
			ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
							 initiator, extra_ies,
							 extra_ies_len);
		break;
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_DISCOVERY_REQUEST:
		if (extra_ies_len)
			skb_put_data(skb, extra_ies, extra_ies_len);
		if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
			ieee80211_tdls_add_link_ie(link, skb,
						   peer, initiator);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		ieee80211_tdls_add_chan_switch_req_ies(link, skb, peer,
						       initiator, extra_ies,
						       extra_ies_len,
						       oper_class, chandef);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ieee80211_tdls_add_chan_switch_resp_ies(link, skb, peer,
							status_code,
							initiator, extra_ies,
							extra_ies_len);
		break;
	}

}

static int
ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
			       struct ieee80211_link_data *link,
			       const u8 *peer, u8 action_code, u8 dialog_token,
			       u16 status_code, struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_tdls_data *tf;

	tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u));

	memcpy(tf->da, peer, ETH_ALEN);
	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;

	/* network header is after the ethernet header */
	skb_set_network_header(skb, ETH_HLEN);

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_REQUEST;

		skb_put(skb, sizeof(tf->u.setup_req));
		tf->u.setup_req.dialog_token = dialog_token;
		tf->u.setup_req.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	case WLAN_TDLS_SETUP_RESPONSE:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_RESPONSE;

		skb_put(skb, sizeof(tf->u.setup_resp));
		tf->u.setup_resp.status_code = cpu_to_le16(status_code);
		tf->u.setup_resp.dialog_token = dialog_token;
		tf->u.setup_resp.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	case WLAN_TDLS_SETUP_CONFIRM:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;

		skb_put(skb, sizeof(tf->u.setup_cfm));
		tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
		tf->u.setup_cfm.dialog_token = dialog_token;
		break;
	case WLAN_TDLS_TEARDOWN:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_TEARDOWN;

		skb_put(skb, sizeof(tf->u.teardown));
		tf->u.teardown.reason_code = cpu_to_le16(status_code);
		break;
	case WLAN_TDLS_DISCOVERY_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;

		skb_put(skb, sizeof(tf->u.discover_req));
		tf->u.discover_req.dialog_token = dialog_token;
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;

		skb_put(skb, sizeof(tf->u.chan_switch_req));
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;

		skb_put(skb, sizeof(tf->u.chan_switch_resp));
		tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int
ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
			   const u8 *peer, struct ieee80211_link_data *link,
			   u8 action_code, u8 dialog_token,
			   u16 status_code, struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_mgmt *mgmt;

	mgmt = skb_put_zero(skb, 24);
	memcpy(mgmt->da, peer, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, link->u.mgd.bssid, ETH_ALEN);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_ACTION);

	switch (action_code) {
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp));
		mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
		mgmt->u.action.u.tdls_discover_resp.action_code =
			WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
		mgmt->u.action.u.tdls_discover_resp.dialog_token =
			dialog_token;
		mgmt->u.action.u.tdls_discover_resp.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static struct sk_buff *
ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
				      const u8 *peer, int link_id,
				      u8 action_code, u8 dialog_token,
				      u16 status_code, bool initiator,
				      const u8 *extra_ies, size_t extra_ies_len,
				      u8 oper_class,
				      struct cfg80211_chan_def *chandef)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	int ret;
	struct ieee80211_link_data *link;

	link_id = link_id >= 0 ? link_id : 0;
	rcu_read_lock();
	link = rcu_dereference(sdata->link[link_id]);
	if (WARN_ON(!link))
		goto unlock;

	skb = netdev_alloc_skb(sdata->dev,
			       local->hw.extra_tx_headroom +
			       max(sizeof(struct ieee80211_mgmt),
				   sizeof(struct ieee80211_tdls_data)) +
			       50 + /* supported rates */
			       10 + /* ext capab */
			       26 + /* max(WMM-info, WMM-param) */
			       2 + max(sizeof(struct ieee80211_ht_cap),
				       sizeof(struct ieee80211_ht_operation)) +
			       2 + max(sizeof(struct ieee80211_vht_cap),
				       sizeof(struct ieee80211_vht_operation)) +
			       2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
				       sizeof(struct ieee80211_he_mcs_nss_supp) +
				       IEEE80211_HE_PPE_THRES_MAX_LEN +
			       2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
			       2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
				       sizeof(struct ieee80211_eht_mcs_nss_supp) +
				       IEEE80211_EHT_PPE_THRES_MAX_LEN +
			       50 + /* supported channels */
			       3 + /* 40/20 BSS coex */
			       4 + /* AID */
			       4 + /* oper classes */
			       extra_ies_len +
			       sizeof(struct ieee80211_tdls_lnkie));
	if (!skb)
		goto unlock;

	skb_reserve(skb, local->hw.extra_tx_headroom);

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_DISCOVERY_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
						     sdata->dev, link, peer,
						     action_code, dialog_token,
						     status_code, skb);
		break;
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
						 peer, link, action_code,
						 dialog_token, status_code,
						 skb);
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	if (ret < 0)
		goto fail;

	ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
			       initiator, extra_ies, extra_ies_len, oper_class,
			       chandef);
	rcu_read_unlock();
	return skb;

fail:
	dev_kfree_skb(skb);
unlock:
	rcu_read_unlock();
	return NULL;
}

static int
ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
				const u8 *peer, int link_id,
				u8 action_code, u8 dialog_token,
				u16 status_code, u32 peer_capability,
				bool initiator, const u8 *extra_ies,
				size_t extra_ies_len, u8 oper_class,
				struct cfg80211_chan_def *chandef)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct sk_buff *skb = NULL;
	struct sta_info *sta;
	u32 flags = 0;
	int ret = 0;

	rcu_read_lock();
	sta = sta_info_get(sdata, peer);

	/* infer the initiator if we can, to support old userspace */
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
		if (sta) {
			set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
			sta->sta.tdls_initiator = false;
		}
		fallthrough;
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_TDLS_DISCOVERY_REQUEST:
		initiator = true;
		break;
	case WLAN_TDLS_SETUP_RESPONSE:
		/*
		 * In some testing scenarios, we send a request and response.
		 * Make the last packet sent take effect for the initiator
		 * value.
		 */
		if (sta) {
			clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
			sta->sta.tdls_initiator = true;
		}
		fallthrough;
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		initiator = false;
		break;
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		/* any value is ok */
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
		initiator = true;

	rcu_read_unlock();
	if (ret < 0)
		goto fail;

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
						    link_id, action_code,
						    dialog_token, status_code,
						    initiator, extra_ies,
						    extra_ies_len, oper_class,
						    chandef);
	if (!skb) {
		ret = -EINVAL;
		goto fail;
	}

	if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
		ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
		return 0;
	}

	/*
	 * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
	 * we should default to AC_VI.
	 */
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
		skb->priority = 256 + 2;
		break;
	default:
		skb->priority = 256 + 5;
		break;
	}

	/*
	 * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress.
	 * Later, if no ACK is returned from peer, we will re-send the teardown
	 * packet through the AP.
	 */
	if ((action_code == WLAN_TDLS_TEARDOWN) &&
	    ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
		bool try_resend; /* Should we keep skb for possible resend */

		/* If not sending directly to peer - no point in keeping skb */
		rcu_read_lock();
		sta = sta_info_get(sdata, peer);
		try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
		rcu_read_unlock();

		spin_lock_bh(&sdata->u.mgd.teardown_lock);
		if (try_resend && !sdata->u.mgd.teardown_skb) {
			/* Mark it as requiring TX status callback  */
			flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
				 IEEE80211_TX_INTFL_MLME_CONN_TX;

			/*
			 * skb is copied since mac80211 will later set
			 * properties that might not be the same as the AP,
			 * such as encryption, QoS, addresses, etc.
			 *
			 * No problem if skb_copy() fails, so no need to check.
			 */
			sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC);
			sdata->u.mgd.orig_teardown_skb = skb;
		}
		spin_unlock_bh(&sdata->u.mgd.teardown_lock);
	}

	/* disable bottom halves when entering the Tx path */
	local_bh_disable();
	__ieee80211_subif_start_xmit(skb, dev, flags,
				     IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
	local_bh_enable();

	return ret;

fail:
	dev_kfree_skb(skb);
	return ret;
}

static int
ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
			  const u8 *peer, int link_id,
			  u8 action_code, u8 dialog_token,
			  u16 status_code, u32 peer_capability, bool initiator,
			  const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	enum ieee80211_smps_mode smps_mode =
		sdata->deflink.u.mgd.driver_smps_mode;
	int ret;

	/* don't support setup with forced SMPS mode that's not off */
	if (smps_mode != IEEE80211_SMPS_AUTOMATIC &&
	    smps_mode != IEEE80211_SMPS_OFF) {
		tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n",
			 smps_mode);
		return -EOPNOTSUPP;
	}

	lockdep_assert_wiphy(local->hw.wiphy);

	/* we don't support concurrent TDLS peer setups */
	if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) &&
	    !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
		ret = -EBUSY;
		goto out_unlock;
	}

	/*
	 * make sure we have a STA representing the peer so we drop or buffer
	 * non-TDLS-setup frames to the peer. We can't send other packets
	 * during setup through the AP path.
	 * Allow error packets to be sent - sometimes we don't even add a STA
	 * before failing the setup.
	 */
	if (status_code == 0) {
		rcu_read_lock();
		if (!sta_info_get(sdata, peer)) {
			rcu_read_unlock();
			ret = -ENOLINK;
			goto out_unlock;
		}
		rcu_read_unlock();
	}

	ieee80211_flush_queues(local, sdata, false);
	memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN);

	/* we cannot take the mutex while preparing the setup packet */
	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
					      link_id, action_code,
					      dialog_token, status_code,
					      peer_capability, initiator,
					      extra_ies, extra_ies_len, 0,
					      NULL);
	if (ret < 0) {
		eth_zero_addr(sdata->u.mgd.tdls_peer);
		return ret;
	}

	wiphy_delayed_work_queue(sdata->local->hw.wiphy,
				 &sdata->u.mgd.tdls_peer_del_work,
				 TDLS_PEER_SETUP_TIMEOUT);
	return 0;

out_unlock:
	return ret;
}

static int
ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
			     const u8 *peer, int link_id,
			     u8 action_code, u8 dialog_token,
			     u16 status_code, u32 peer_capability,
			     bool initiator, const u8 *extra_ies,
			     size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;
	int ret;

	/*
	 * No packets can be transmitted to the peer via the AP during setup -
	 * the STA is set as a TDLS peer, but is not authorized.
	 * During teardown, we prevent direct transmissions by stopping the
	 * queues and flushing all direct packets.
	 */
	ieee80211_stop_vif_queues(local, sdata,
				  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);
	ieee80211_flush_queues(local, sdata, false);

	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
					      link_id, action_code,
					      dialog_token, status_code,
					      peer_capability, initiator,
					      extra_ies, extra_ies_len, 0,
					      NULL);
	if (ret < 0)
		sdata_err(sdata, "Failed sending TDLS teardown packet %d\n",
			  ret);

	/*
	 * Remove the STA AUTH flag to force further traffic through the AP. If
	 * the STA was unreachable, it was already removed.
	 */
	rcu_read_lock();
	sta = sta_info_get(sdata, peer);
	if (sta)
		clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
	rcu_read_unlock();

	ieee80211_wake_vif_queues(local, sdata,
				  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);

	return 0;
}

int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
			const u8 *peer, int link_id,
			u8 action_code, u8 dialog_token, u16 status_code,
			u32 peer_capability, bool initiator,
			const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	int ret;

	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
		return -EOPNOTSUPP;

	/* make sure we are in managed mode, and associated */
	if (sdata->vif.type != NL80211_IFTYPE_STATION ||
	    !sdata->u.mgd.associated)
		return -EINVAL;

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
						link_id, action_code,
						dialog_token, status_code,
						peer_capability, initiator,
						extra_ies, extra_ies_len);
		break;
	case WLAN_TDLS_TEARDOWN:
		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
						   action_code, dialog_token,
						   status_code,
						   peer_capability, initiator,
						   extra_ies, extra_ies_len);
		break;
	case WLAN_TDLS_DISCOVERY_REQUEST:
		/*
		 * Protect the discovery so we can hear the TDLS discovery
		 * response frame. It is transmitted directly and not buffered
		 * by the AP.
		 */
		drv_mgd_protect_tdls_discover(sdata->local, sdata, link_id);
		fallthrough;
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		/* no special handling */
		ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
						      link_id, action_code,
						      dialog_token,
						      status_code,
						      peer_capability,
						      initiator, extra_ies,
						      extra_ies_len, 0, NULL);
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	tdls_dbg(sdata, "TDLS mgmt action %d peer %pM link_id %d status %d\n",
		 action_code, peer, link_id, ret);
	return ret;
}

static void iee80211_tdls_recalc_chanctx(struct ieee80211_sub_if_data *sdata,
					 struct sta_info *sta)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_chanctx_conf *conf;
	struct ieee80211_chanctx *ctx;
	enum nl80211_chan_width width;
	struct ieee80211_supported_band *sband;

	lockdep_assert_wiphy(local->hw.wiphy);

	conf = rcu_dereference_protected(sdata->vif.bss_conf.chanctx_conf,
					 lockdep_is_held(&local->hw.wiphy->mtx));
	if (conf) {
		width = conf->def.width;
		sband = local->hw.wiphy->bands[conf->def.chan->band];
		ctx = container_of(conf, struct ieee80211_chanctx, conf);
		ieee80211_recalc_chanctx_chantype(local, ctx);

		/* if width changed and a peer is given, update its BW */
		if (width != conf->def.width && sta &&
		    test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) {
			enum ieee80211_sta_rx_bandwidth bw;

			bw = ieee80211_chan_width_to_rx_bw(conf->def.width);
			bw = min(bw, ieee80211_sta_cap_rx_bw(&sta->deflink));
			if (bw != sta->sta.deflink.bandwidth) {
				sta->sta.deflink.bandwidth = bw;
				rate_control_rate_update(local, sband,
							 &sta->deflink,
							 IEEE80211_RC_BW_CHANGED);
				/*
				 * if a TDLS peer BW was updated, we need to
				 * recalc the chandef width again, to get the
				 * correct chanctx min_def
				 */
				ieee80211_recalc_chanctx_chantype(local, ctx);
			}
		}

	}
}

static int iee80211_tdls_have_ht_peers(struct ieee80211_sub_if_data *sdata)
{
	struct sta_info *sta;
	bool result = false;

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
		if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
		    !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
		    !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH) ||
		    !sta->sta.deflink.ht_cap.ht_supported)
			continue;
		result = true;
		break;
	}
	rcu_read_unlock();

	return result;
}

static void
iee80211_tdls_recalc_ht_protection(struct ieee80211_sub_if_data *sdata,
				   struct sta_info *sta)
{
	bool tdls_ht;
	u16 protection = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
			 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
			 IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
	u16 opmode;

	/* Nothing to do if the BSS connection uses (at least) HT */
	if (sdata->deflink.u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT)
		return;

	tdls_ht = (sta && sta->sta.deflink.ht_cap.ht_supported) ||
		  iee80211_tdls_have_ht_peers(sdata);

	opmode = sdata->vif.bss_conf.ht_operation_mode;

	if (tdls_ht)
		opmode |= protection;
	else
		opmode &= ~protection;

	if (opmode == sdata->vif.bss_conf.ht_operation_mode)
		return;

	sdata->vif.bss_conf.ht_operation_mode = opmode;
	ieee80211_link_info_change_notify(sdata, &sdata->deflink,
					  BSS_CHANGED_HT);
}

int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
			const u8 *peer, enum nl80211_tdls_operation oper)
{
	struct sta_info *sta;
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
		return -EOPNOTSUPP;

	if (sdata->vif.type != NL80211_IFTYPE_STATION || !sdata->vif.cfg.assoc)
		return -EINVAL;

	switch (oper) {
	case NL80211_TDLS_ENABLE_LINK:
	case NL80211_TDLS_DISABLE_LINK:
		break;
	case NL80211_TDLS_TEARDOWN:
	case NL80211_TDLS_SETUP:
	case NL80211_TDLS_DISCOVERY_REQ:
		/* We don't support in-driver setup/teardown/discovery */
		return -EOPNOTSUPP;
	}

	/* protect possible bss_conf changes and avoid concurrency in
	 * ieee80211_bss_info_change_notify()
	 */
	tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer);

	switch (oper) {
	case NL80211_TDLS_ENABLE_LINK:
		if (sdata->vif.bss_conf.csa_active) {
			tdls_dbg(sdata, "TDLS: disallow link during CSA\n");
			return -EBUSY;
		}

		sta = sta_info_get(sdata, peer);
		if (!sta || !sta->sta.tdls)
			return -ENOLINK;

		iee80211_tdls_recalc_chanctx(sdata, sta);
		iee80211_tdls_recalc_ht_protection(sdata, sta);

		set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);

		WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) ||
			     !ether_addr_equal(sdata->u.mgd.tdls_peer, peer));
		break;
	case NL80211_TDLS_DISABLE_LINK:
		/*
		 * The teardown message in ieee80211_tdls_mgmt_teardown() was
		 * created while the queues were stopped, so it might still be
		 * pending. Before flushing the queues we need to be sure the
		 * message is handled by the tasklet handling pending messages,
		 * otherwise we might start destroying the station before
		 * sending the teardown packet.
		 * Note that this only forces the tasklet to flush pendings -
		 * not to stop the tasklet from rescheduling itself.
		 */
		tasklet_kill(&local->tx_pending_tasklet);
		/* flush a potentially queued teardown packet */
		ieee80211_flush_queues(local, sdata, false);

		ret = sta_info_destroy_addr(sdata, peer);

		iee80211_tdls_recalc_ht_protection(sdata, NULL);

		iee80211_tdls_recalc_chanctx(sdata, NULL);
		if (ret)
			return ret;
		break;
	default:
		return -EOPNOTSUPP;
	}

	if (ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
		wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
					  &sdata->u.mgd.tdls_peer_del_work);
		eth_zero_addr(sdata->u.mgd.tdls_peer);
	}

	wiphy_work_queue(sdata->local->hw.wiphy,
			 &sdata->deflink.u.mgd.request_smps_work);

	return 0;
}

void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer,
				 enum nl80211_tdls_operation oper,
				 u16 reason_code, gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	if (vif->type != NL80211_IFTYPE_STATION || !vif->cfg.assoc) {
		sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n",
			  oper);
		return;
	}

	cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp);
}
EXPORT_SYMBOL(ieee80211_tdls_oper_request);

static void
iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout)
{
	struct ieee80211_ch_switch_timing *ch_sw;

	*buf++ = WLAN_EID_CHAN_SWITCH_TIMING;
	*buf++ = sizeof(struct ieee80211_ch_switch_timing);

	ch_sw = (void *)buf;
	ch_sw->switch_time = cpu_to_le16(switch_time);
	ch_sw->switch_timeout = cpu_to_le16(switch_timeout);
}

/* find switch timing IE in SKB ready for Tx */
static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb)
{
	struct ieee80211_tdls_data *tf;
	const u8 *ie_start;

	/*
	 * Get the offset for the new location of the switch timing IE.
	 * The SKB network header will now point to the "payload_type"
	 * element of the TDLS data frame struct.
	 */
	tf = container_of(skb->data + skb_network_offset(skb),
			  struct ieee80211_tdls_data, payload_type);
	ie_start = tf->u.chan_switch_req.variable;
	return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start,
				skb->len - (ie_start - skb->data));
}

static struct sk_buff *
ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class,
			      struct cfg80211_chan_def *chandef,
			      u32 *ch_sw_tm_ie_offset)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
		     2 + sizeof(struct ieee80211_ch_switch_timing)];
	int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing);
	u8 *pos = extra_ies;
	struct sk_buff *skb;
	int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;

	/*
	 * if chandef points to a wide channel add a Secondary-Channel
	 * Offset information element
	 */
	if (chandef->width == NL80211_CHAN_WIDTH_40) {
		struct ieee80211_sec_chan_offs_ie *sec_chan_ie;
		bool ht40plus;

		*pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
		*pos++ = sizeof(*sec_chan_ie);
		sec_chan_ie = (void *)pos;

		ht40plus = cfg80211_get_chandef_type(chandef) ==
							NL80211_CHAN_HT40PLUS;
		sec_chan_ie->sec_chan_offs = ht40plus ?
					     IEEE80211_HT_PARAM_CHA_SEC_ABOVE :
					     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
		pos += sizeof(*sec_chan_ie);

		extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
	}

	/* just set the values to 0, this is a template */
	iee80211_tdls_add_ch_switch_timing(pos, 0, 0);

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
					      link_id,
					      WLAN_TDLS_CHANNEL_SWITCH_REQUEST,
					      0, 0, !sta->sta.tdls_initiator,
					      extra_ies, extra_ies_len,
					      oper_class, chandef);
	if (!skb)
		return NULL;

	skb = ieee80211_build_data_template(sdata, skb, 0);
	if (IS_ERR(skb)) {
		tdls_dbg(sdata, "Failed building TDLS channel switch frame\n");
		return NULL;
	}

	if (ch_sw_tm_ie_offset) {
		const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);

		if (!tm_ie) {
			tdls_dbg(sdata, "No switch timing IE in TDLS switch\n");
			dev_kfree_skb_any(skb);
			return NULL;
		}

		*ch_sw_tm_ie_offset = tm_ie - skb->data;
	}

	tdls_dbg(sdata,
		 "TDLS channel switch request template for %pM ch %d width %d\n",
		 sta->sta.addr, chandef->chan->center_freq, chandef->width);
	return skb;
}

int
ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
			      const u8 *addr, u8 oper_class,
			      struct cfg80211_chan_def *chandef)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;
	struct sk_buff *skb = NULL;
	u32 ch_sw_tm_ie;
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (chandef->chan->freq_offset)
		/* this may work, but is untested */
		return -EOPNOTSUPP;

	sta = sta_info_get(sdata, addr);
	if (!sta) {
		tdls_dbg(sdata,
			 "Invalid TDLS peer %pM for channel switch request\n",
			 addr);
		ret = -ENOENT;
		goto out;
	}

	if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) {
		tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n",
			 addr);
		ret = -EOPNOTSUPP;
		goto out;
	}

	skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef,
					    &ch_sw_tm_ie);
	if (!skb) {
		ret = -ENOENT;
		goto out;
	}

	ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class,
				      chandef, skb, ch_sw_tm_ie);
	if (!ret)
		set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);

out:
	dev_kfree_skb_any(skb);
	return ret;
}

void
ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
				     struct net_device *dev,
				     const u8 *addr)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;

	lockdep_assert_wiphy(local->hw.wiphy);

	sta = sta_info_get(sdata, addr);
	if (!sta) {
		tdls_dbg(sdata,
			 "Invalid TDLS peer %pM for channel switch cancel\n",
			 addr);
		return;
	}

	if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
		tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n",
			 addr);
		return;
	}

	drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
	clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
}

static struct sk_buff *
ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta,
				   u32 *ch_sw_tm_ie_offset)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	struct sk_buff *skb;
	u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)];
	int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;

	/* initial timing are always zero in the template */
	iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0);

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
					link_id,
					WLAN_TDLS_CHANNEL_SWITCH_RESPONSE,
					0, 0, !sta->sta.tdls_initiator,
					extra_ies, sizeof(extra_ies), 0, NULL);
	if (!skb)
		return NULL;

	skb = ieee80211_build_data_template(sdata, skb, 0);
	if (IS_ERR(skb)) {
		tdls_dbg(sdata,
			 "Failed building TDLS channel switch resp frame\n");
		return NULL;
	}

	if (ch_sw_tm_ie_offset) {
		const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);

		if (!tm_ie) {
			tdls_dbg(sdata,
				 "No switch timing IE in TDLS switch resp\n");
			dev_kfree_skb_any(skb);
			return NULL;
		}

		*ch_sw_tm_ie_offset = tm_ie - skb->data;
	}

	tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n",
		 sta->sta.addr);
	return skb;
}

static int
ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata,
					   struct sk_buff *skb)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee802_11_elems *elems = NULL;
	struct sta_info *sta;
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	bool local_initiator;
	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
	int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable);
	struct ieee80211_tdls_ch_sw_params params = {};
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
	params.timestamp = rx_status->device_timestamp;

	if (skb->len < baselen) {
		tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n",
			 skb->len);
		return -EINVAL;
	}

	sta = sta_info_get(sdata, tf->sa);
	if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
		tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
			 tf->sa);
		ret = -EINVAL;
		goto out;
	}

	params.sta = &sta->sta;
	params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code);
	if (params.status != 0) {
		ret = 0;
		goto call_drv;
	}

	elems = ieee802_11_parse_elems(tf->u.chan_switch_resp.variable,
				       skb->len - baselen,
				       IEEE80211_FTYPE_MGMT |
				       IEEE80211_STYPE_ACTION,
				       NULL);
	if (!elems) {
		ret = -ENOMEM;
		goto out;
	}

	if (elems->parse_error) {
		tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n");
		ret = -EINVAL;
		goto out;
	}

	if (!elems->ch_sw_timing || !elems->lnk_id) {
		tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n");
		ret = -EINVAL;
		goto out;
	}

	/* validate the initiator is set correctly */
	local_initiator =
		!memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
	if (local_initiator == sta->sta.tdls_initiator) {
		tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
		ret = -EINVAL;
		goto out;
	}

	params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time);
	params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout);

	params.tmpl_skb =
		ieee80211_tdls_ch_sw_resp_tmpl_get(sta, &params.ch_sw_tm_ie);
	if (!params.tmpl_skb) {
		ret = -ENOENT;
		goto out;
	}

	ret = 0;
call_drv:
	drv_tdls_recv_channel_switch(sdata->local, sdata, &params);

	tdls_dbg(sdata,
		 "TDLS channel switch response received from %pM status %d\n",
		 tf->sa, params.status);

out:
	dev_kfree_skb_any(params.tmpl_skb);
	kfree(elems);
	return ret;
}

static int
ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
					  struct sk_buff *skb)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee802_11_elems *elems;
	struct cfg80211_chan_def chandef;
	struct ieee80211_channel *chan;
	enum nl80211_channel_type chan_type;
	int freq;
	u8 target_channel, oper_class;
	bool local_initiator;
	struct sta_info *sta;
	enum nl80211_band band;
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
	int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable);
	struct ieee80211_tdls_ch_sw_params params = {};
	int ret = 0;

	lockdep_assert_wiphy(local->hw.wiphy);

	params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
	params.timestamp = rx_status->device_timestamp;

	if (skb->len < baselen) {
		tdls_dbg(sdata, "TDLS channel switch req too short: %d\n",
			 skb->len);
		return -EINVAL;
	}

	target_channel = tf->u.chan_switch_req.target_channel;
	oper_class = tf->u.chan_switch_req.oper_class;

	/*
	 * We can't easily infer the channel band. The operating class is
	 * ambiguous - there are multiple tables (US/Europe/JP/Global). The
	 * solution here is to treat channels with number >14 as 5GHz ones,
	 * and specifically check for the (oper_class, channel) combinations
	 * where this doesn't hold. These are thankfully unique according to
	 * IEEE802.11-2012.
	 * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as
	 * valid here.
	 */
	if ((oper_class == 112 || oper_class == 2 || oper_class == 3 ||
	     oper_class == 4 || oper_class == 5 || oper_class == 6) &&
	     target_channel < 14)
		band = NL80211_BAND_5GHZ;
	else
		band = target_channel < 14 ? NL80211_BAND_2GHZ :
					     NL80211_BAND_5GHZ;

	freq = ieee80211_channel_to_frequency(target_channel, band);
	if (freq == 0) {
		tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n",
			 target_channel);
		return -EINVAL;
	}

	chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
	if (!chan) {
		tdls_dbg(sdata,
			 "Unsupported channel for TDLS chan switch: %d\n",
			 target_channel);
		return -EINVAL;
	}

	elems = ieee802_11_parse_elems(tf->u.chan_switch_req.variable,
				       skb->len - baselen,
				       IEEE80211_FTYPE_MGMT |
				       IEEE80211_STYPE_ACTION,
				       NULL);
	if (!elems)
		return -ENOMEM;

	if (elems->parse_error) {
		tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n");
		ret = -EINVAL;
		goto free;
	}

	if (!elems->ch_sw_timing || !elems->lnk_id) {
		tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n");
		ret = -EINVAL;
		goto free;
	}

	if (!elems->sec_chan_offs) {
		chan_type = NL80211_CHAN_HT20;
	} else {
		switch (elems->sec_chan_offs->sec_chan_offs) {
		case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
			chan_type = NL80211_CHAN_HT40PLUS;
			break;
		case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
			chan_type = NL80211_CHAN_HT40MINUS;
			break;
		default:
			chan_type = NL80211_CHAN_HT20;
			break;
		}
	}

	cfg80211_chandef_create(&chandef, chan, chan_type);

	/* we will be active on the TDLS link */
	if (!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &chandef,
					   sdata->wdev.iftype)) {
		tdls_dbg(sdata, "TDLS chan switch to forbidden channel\n");
		ret = -EINVAL;
		goto free;
	}

	sta = sta_info_get(sdata, tf->sa);
	if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
		tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
			 tf->sa);
		ret = -EINVAL;
		goto out;
	}

	params.sta = &sta->sta;

	/* validate the initiator is set correctly */
	local_initiator =
		!memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
	if (local_initiator == sta->sta.tdls_initiator) {
		tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
		ret = -EINVAL;
		goto out;
	}

	/* peer should have known better */
	if (!sta->sta.deflink.ht_cap.ht_supported && elems->sec_chan_offs &&
	    elems->sec_chan_offs->sec_chan_offs) {
		tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n");
		ret = -EOPNOTSUPP;
		goto out;
	}

	params.chandef = &chandef;
	params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time);
	params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout);

	params.tmpl_skb =
		ieee80211_tdls_ch_sw_resp_tmpl_get(sta,
						   &params.ch_sw_tm_ie);
	if (!params.tmpl_skb) {
		ret = -ENOENT;
		goto out;
	}

	drv_tdls_recv_channel_switch(sdata->local, sdata, &params);

	tdls_dbg(sdata,
		 "TDLS ch switch request received from %pM ch %d width %d\n",
		 tf->sa, params.chandef->chan->center_freq,
		 params.chandef->width);
out:
	dev_kfree_skb_any(params.tmpl_skb);
free:
	kfree(elems);
	return ret;
}

void
ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
				      struct sk_buff *skb)
{
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	struct wiphy *wiphy = sdata->local->hw.wiphy;

	lockdep_assert_wiphy(wiphy);

	/* make sure the driver supports it */
	if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
		return;

	/* we want to access the entire packet */
	if (skb_linearize(skb))
		return;
	/*
	 * The packet/size was already validated by mac80211 Rx path, only look
	 * at the action type.
	 */
	switch (tf->action_code) {
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		ieee80211_process_tdls_channel_switch_req(sdata, skb);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ieee80211_process_tdls_channel_switch_resp(sdata, skb);
		break;
	default:
		WARN_ON_ONCE(1);
		return;
	}
}

void ieee80211_teardown_tdls_peers(struct ieee80211_link_data *link)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct sta_info *sta;
	u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
		if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
		    !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
			continue;

		if (sta->deflink.link_id != link->link_id)
			continue;

		ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr,
					    NL80211_TDLS_TEARDOWN, reason,
					    GFP_ATOMIC);
	}
	rcu_read_unlock();
}

void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata,
				      const u8 *peer, u16 reason)
{
	struct ieee80211_sta *sta;

	rcu_read_lock();
	sta = ieee80211_find_sta(&sdata->vif, peer);
	if (!sta || !sta->tdls) {
		rcu_read_unlock();
		return;
	}
	rcu_read_unlock();

	tdls_dbg(sdata, "disconnected from TDLS peer %pM (Reason: %u=%s)\n",
		 peer, reason,
		 ieee80211_get_reason_code_string(reason));

	ieee80211_tdls_oper_request(&sdata->vif, peer,
				    NL80211_TDLS_TEARDOWN,
				    WLAN_REASON_TDLS_TEARDOWN_UNREACHABLE,
				    GFP_ATOMIC);
}
]

gemini-3.1-pro-preview

							input: 57730
							output: 32
							thoughts: 0
						

map[Expression:ieee80211_tdls_add_setup_cfm_ies]

map[Output:net/mac80211/tdls.c=591=static void
net/mac80211/tdls.c:592:ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
net/mac80211/tdls.c-593-				 struct sk_buff *skb, const u8 *peer,
--
net/mac80211/tdls.c=741=static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
--
net/mac80211/tdls.c-761-		if (status_code == 0)
net/mac80211/tdls.c:762:			ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
net/mac80211/tdls.c-763-							 initiator, extra_ies,
]

gemini-3.1-pro-preview

							input: 58038
							output: 60
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_setup_cfm_ies]

map[SourceCode: 591:	static void
 592:	ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
 593:					 struct sk_buff *skb, const u8 *peer,
 594:					 bool initiator, const u8 *extra_ies,
 595:					 size_t extra_ies_len)
 596:	{
 597:		struct ieee80211_sub_if_data *sdata = link->sdata;
 598:		struct ieee80211_local *local = sdata->local;
 599:		size_t offset = 0, noffset;
 600:		struct sta_info *sta, *ap_sta;
 601:		struct ieee80211_supported_band *sband;
 602:		u8 *pos;
 603:	
 604:		sband = ieee80211_get_link_sband(link);
 605:		if (WARN_ON_ONCE(!sband))
 606:			return;
 607:	
 608:		sta = sta_info_get(sdata, peer);
 609:		ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
 610:	
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
 612:			return;
 613:	
 614:		sta->tdls_chandef = link->conf->chanreq.oper;
 615:	
 616:		/* add any custom IEs that go before the QoS IE */
 617:		if (extra_ies_len) {
 618:			static const u8 before_qos[] = {
 619:				WLAN_EID_RSN,
 620:			};
 621:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 622:						     before_qos,
 623:						     ARRAY_SIZE(before_qos),
 624:						     offset);
 625:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 626:			offset = noffset;
 627:		}
 628:	
 629:		/* add the QoS param IE if both the peer and we support it */
 630:		if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
 631:			ieee80211_tdls_add_wmm_param_ie(sdata, skb);
 632:	
 633:		/* add any custom IEs that go before HT operation */
 634:		if (extra_ies_len) {
 635:			static const u8 before_ht_op[] = {
 636:				WLAN_EID_RSN,
 637:				WLAN_EID_QOS_CAPA,
 638:				WLAN_EID_FAST_BSS_TRANSITION,
 639:				WLAN_EID_TIMEOUT_INTERVAL,
 640:			};
 641:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 642:						     before_ht_op,
 643:						     ARRAY_SIZE(before_ht_op),
 644:						     offset);
 645:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 646:			offset = noffset;
 647:		}
 648:	
 649:		/*
 650:		 * if HT support is only added in TDLS, we need an HT-operation IE.
 651:		 * add the IE as required by IEEE802.11-2012 9.23.3.2.
 652:		 */
 653:		if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
 654:			u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
 655:				   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
 656:				   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
 657:	
 658:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
 659:			ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
 660:						   &link->conf->chanreq.oper, prot,
 661:						   true);
 662:		}
 663:	
 664:		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 665:	
 666:		/* only include VHT-operation if not on the 2.4GHz band */
 667:		if (sband->band != NL80211_BAND_2GHZ &&
 668:		    sta->sta.deflink.vht_cap.vht_supported) {
 669:			/*
 670:			 * if both peers support WIDER_BW, we can expand the chandef to
 671:			 * a wider compatible one, up to 80MHz
 672:			 */
 673:			if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 674:				ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 675:	
 676:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
 677:			ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
 678:						    &sta->tdls_chandef);
 679:		}
 680:	
 681:		/* add any remaining IEs */
 682:		if (extra_ies_len) {
 683:			noffset = extra_ies_len;
 684:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 685:		}
 686:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3.1-pro-preview

							input: 59919
							output: 68
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeSnippetLines:0 Name:ieee80211_tdls_add_setup_cfm_ies SourceTreePrefix:]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_add_ies SourceFile:net/mac80211/tdls.c SourceLine:762]] TruncatedOutput:false]

gemini-3.1-pro-preview

							input: 60071
							output: 56
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_ies]

map[SourceCode: 741:	static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
 742:					   struct sk_buff *skb, const u8 *peer,
 743:					   u8 action_code, u16 status_code,
 744:					   bool initiator, const u8 *extra_ies,
 745:					   size_t extra_ies_len, u8 oper_class,
 746:					   struct cfg80211_chan_def *chandef)
 747:	{
 748:		switch (action_code) {
 749:		case WLAN_TDLS_SETUP_REQUEST:
 750:		case WLAN_TDLS_SETUP_RESPONSE:
 751:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 752:			if (status_code == 0)
 753:				ieee80211_tdls_add_setup_start_ies(link,
 754:								   skb, peer,
 755:								   action_code,
 756:								   initiator,
 757:								   extra_ies,
 758:								   extra_ies_len);
 759:			break;
 760:		case WLAN_TDLS_SETUP_CONFIRM:
 761:			if (status_code == 0)
 762:				ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
 763:								 initiator, extra_ies,
 764:								 extra_ies_len);
 765:			break;
 766:		case WLAN_TDLS_TEARDOWN:
 767:		case WLAN_TDLS_DISCOVERY_REQUEST:
 768:			if (extra_ies_len)
 769:				skb_put_data(skb, extra_ies, extra_ies_len);
 770:			if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
 771:				ieee80211_tdls_add_link_ie(link, skb,
 772:							   peer, initiator);
 773:			break;
 774:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 775:			ieee80211_tdls_add_chan_switch_req_ies(link, skb, peer,
 776:							       initiator, extra_ies,
 777:							       extra_ies_len,
 778:							       oper_class, chandef);
 779:			break;
 780:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 781:			ieee80211_tdls_add_chan_switch_resp_ies(link, skb, peer,
 782:								status_code,
 783:								initiator, extra_ies,
 784:								extra_ies_len);
 785:			break;
 786:		}
 787:	
 788:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3.1-pro-preview

							input: 60992
							output: 64
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeSnippetLines:0 Name:ieee80211_tdls_add_ies SourceTreePrefix:]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_build_mgmt_packet_data SourceFile:net/mac80211/tdls.c SourceLine:984]] TruncatedOutput:false]

gemini-3.1-pro-preview

							input: 61144
							output: 60
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_build_mgmt_packet_data]

map[SourceCode: 908:	static struct sk_buff *
 909:	ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 910:					      const u8 *peer, int link_id,
 911:					      u8 action_code, u8 dialog_token,
 912:					      u16 status_code, bool initiator,
 913:					      const u8 *extra_ies, size_t extra_ies_len,
 914:					      u8 oper_class,
 915:					      struct cfg80211_chan_def *chandef)
 916:	{
 917:		struct ieee80211_local *local = sdata->local;
 918:		struct sk_buff *skb;
 919:		int ret;
 920:		struct ieee80211_link_data *link;
 921:	
 922:		link_id = link_id >= 0 ? link_id : 0;
 923:		rcu_read_lock();
 924:		link = rcu_dereference(sdata->link[link_id]);
 925:		if (WARN_ON(!link))
 926:			goto unlock;
 927:	
 928:		skb = netdev_alloc_skb(sdata->dev,
 929:				       local->hw.extra_tx_headroom +
 930:				       max(sizeof(struct ieee80211_mgmt),
 931:					   sizeof(struct ieee80211_tdls_data)) +
 932:				       50 + /* supported rates */
 933:				       10 + /* ext capab */
 934:				       26 + /* max(WMM-info, WMM-param) */
 935:				       2 + max(sizeof(struct ieee80211_ht_cap),
 936:					       sizeof(struct ieee80211_ht_operation)) +
 937:				       2 + max(sizeof(struct ieee80211_vht_cap),
 938:					       sizeof(struct ieee80211_vht_operation)) +
 939:				       2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
 940:					       sizeof(struct ieee80211_he_mcs_nss_supp) +
 941:					       IEEE80211_HE_PPE_THRES_MAX_LEN +
 942:				       2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
 943:				       2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
 944:					       sizeof(struct ieee80211_eht_mcs_nss_supp) +
 945:					       IEEE80211_EHT_PPE_THRES_MAX_LEN +
 946:				       50 + /* supported channels */
 947:				       3 + /* 40/20 BSS coex */
 948:				       4 + /* AID */
 949:				       4 + /* oper classes */
 950:				       extra_ies_len +
 951:				       sizeof(struct ieee80211_tdls_lnkie));
 952:		if (!skb)
 953:			goto unlock;
 954:	
 955:		skb_reserve(skb, local->hw.extra_tx_headroom);
 956:	
 957:		switch (action_code) {
 958:		case WLAN_TDLS_SETUP_REQUEST:
 959:		case WLAN_TDLS_SETUP_RESPONSE:
 960:		case WLAN_TDLS_SETUP_CONFIRM:
 961:		case WLAN_TDLS_TEARDOWN:
 962:		case WLAN_TDLS_DISCOVERY_REQUEST:
 963:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 964:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 965:			ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
 966:							     sdata->dev, link, peer,
 967:							     action_code, dialog_token,
 968:							     status_code, skb);
 969:			break;
 970:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 971:			ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
 972:							 peer, link, action_code,
 973:							 dialog_token, status_code,
 974:							 skb);
 975:			break;
 976:		default:
 977:			ret = -EOPNOTSUPP;
 978:			break;
 979:		}
 980:	
 981:		if (ret < 0)
 982:			goto fail;
 983:	
 984:		ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
 985:				       initiator, extra_ies, extra_ies_len, oper_class,
 986:				       chandef);
 987:		rcu_read_unlock();
 988:		return skb;
 989:	
 990:	fail:
 991:		dev_kfree_skb(skb);
 992:	unlock:
 993:		rcu_read_unlock();
 994:		return NULL;
 995:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3.1-pro-preview

							input: 62812
							output: 68
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeSnippetLines:0 Name:ieee80211_tdls_build_mgmt_packet_data SourceTreePrefix:]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_ch_sw_resp_tmpl_get SourceFile:net/mac80211/tdls.c SourceLine:1712] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_ch_sw_tmpl_get SourceFile:net/mac80211/tdls.c SourceLine:1587] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_prep_mgmt_packet SourceFile:net/mac80211/tdls.c SourceLine:1058]] TruncatedOutput:false]

gemini-3.1-pro-preview

							input: 63107
							output: 58
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_prep_mgmt_packet]

map[SourceCode: 997:	static int
 998:	ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 999:					const u8 *peer, int link_id,
1000:					u8 action_code, u8 dialog_token,
1001:					u16 status_code, u32 peer_capability,
1002:					bool initiator, const u8 *extra_ies,
1003:					size_t extra_ies_len, u8 oper_class,
1004:					struct cfg80211_chan_def *chandef)
1005:	{
1006:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007:		struct sk_buff *skb = NULL;
1008:		struct sta_info *sta;
1009:		u32 flags = 0;
1010:		int ret = 0;
1011:	
1012:		rcu_read_lock();
1013:		sta = sta_info_get(sdata, peer);
1014:	
1015:		/* infer the initiator if we can, to support old userspace */
1016:		switch (action_code) {
1017:		case WLAN_TDLS_SETUP_REQUEST:
1018:			if (sta) {
1019:				set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
1020:				sta->sta.tdls_initiator = false;
1021:			}
1022:			fallthrough;
1023:		case WLAN_TDLS_SETUP_CONFIRM:
1024:		case WLAN_TDLS_DISCOVERY_REQUEST:
1025:			initiator = true;
1026:			break;
1027:		case WLAN_TDLS_SETUP_RESPONSE:
1028:			/*
1029:			 * In some testing scenarios, we send a request and response.
1030:			 * Make the last packet sent take effect for the initiator
1031:			 * value.
1032:			 */
1033:			if (sta) {
1034:				clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
1035:				sta->sta.tdls_initiator = true;
1036:			}
1037:			fallthrough;
1038:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1039:			initiator = false;
1040:			break;
1041:		case WLAN_TDLS_TEARDOWN:
1042:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
1043:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
1044:			/* any value is ok */
1045:			break;
1046:		default:
1047:			ret = -EOPNOTSUPP;
1048:			break;
1049:		}
1050:	
1051:		if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
1052:			initiator = true;
1053:	
1054:		rcu_read_unlock();
1055:		if (ret < 0)
1056:			goto fail;
1057:	
1058:		skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
1059:							    link_id, action_code,
1060:							    dialog_token, status_code,
1061:							    initiator, extra_ies,
1062:							    extra_ies_len, oper_class,
1063:							    chandef);
1064:		if (!skb) {
1065:			ret = -EINVAL;
1066:			goto fail;
1067:		}
1068:	
1069:		if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
1070:			ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
1071:			return 0;
1072:		}
1073:	
1074:		/*
1075:		 * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
1076:		 * we should default to AC_VI.
1077:		 */
1078:		switch (action_code) {
1079:		case WLAN_TDLS_SETUP_REQUEST:
1080:		case WLAN_TDLS_SETUP_RESPONSE:
1081:			skb->priority = 256 + 2;
1082:			break;
1083:		default:
1084:			skb->priority = 256 + 5;
1085:			break;
1086:		}
1087:	
1088:		/*
1089:		 * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress.
1090:		 * Later, if no ACK is returned from peer, we will re-send the teardown
1091:		 * packet through the AP.
1092:		 */
1093:		if ((action_code == WLAN_TDLS_TEARDOWN) &&
1094:		    ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
1095:			bool try_resend; /* Should we keep skb for possible resend */
1096:	
1097:			/* If not sending directly to peer - no point in keeping skb */
1098:			rcu_read_lock();
1099:			sta = sta_info_get(sdata, peer);
1100:			try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
1101:			rcu_read_unlock();
1102:	
1103:			spin_lock_bh(&sdata->u.mgd.teardown_lock);
1104:			if (try_resend && !sdata->u.mgd.teardown_skb) {
1105:				/* Mark it as requiring TX status callback  */
1106:				flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1107:					 IEEE80211_TX_INTFL_MLME_CONN_TX;
1108:	
1109:				/*
1110:				 * skb is copied since mac80211 will later set
1111:				 * properties that might not be the same as the AP,
1112:				 * such as encryption, QoS, addresses, etc.
1113:				 *
1114:				 * No problem if skb_copy() fails, so no need to check.
1115:				 */
1116:				sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC);
1117:				sdata->u.mgd.orig_teardown_skb = skb;
1118:			}
1119:			spin_unlock_bh(&sdata->u.mgd.teardown_lock);
1120:		}
1121:	
1122:		/* disable bottom halves when entering the Tx path */
1123:		local_bh_disable();
1124:		__ieee80211_subif_start_xmit(skb, dev, flags,
1125:					     IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
1126:		local_bh_enable();
1127:	
1128:		return ret;
1129:	
1130:	fail:
1131:		dev_kfree_skb(skb);
1132:		return ret;
1133:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3.1-pro-preview

							input: 65379
							output: 66
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeSnippetLines:0 Name:ieee80211_tdls_prep_mgmt_packet SourceTreePrefix:]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt SourceFile:net/mac80211/tdls.c SourceLine:1299] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt_setup SourceFile:net/mac80211/tdls.c SourceLine:1186] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt_teardown SourceFile:net/mac80211/tdls.c SourceLine:1229]] TruncatedOutput:false]

gemini-3.1-pro-preview

							input: 65660
							output: 54
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_mgmt]

map[SourceCode:1255:	int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
1256:				const u8 *peer, int link_id,
1257:				u8 action_code, u8 dialog_token, u16 status_code,
1258:				u32 peer_capability, bool initiator,
1259:				const u8 *extra_ies, size_t extra_ies_len)
1260:	{
1261:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1262:		int ret;
1263:	
1264:		if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
1265:			return -EOPNOTSUPP;
1266:	
1267:		/* make sure we are in managed mode, and associated */
1268:		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1269:		    !sdata->u.mgd.associated)
1270:			return -EINVAL;
1271:	
1272:		switch (action_code) {
1273:		case WLAN_TDLS_SETUP_REQUEST:
1274:		case WLAN_TDLS_SETUP_RESPONSE:
1275:			ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
1276:							link_id, action_code,
1277:							dialog_token, status_code,
1278:							peer_capability, initiator,
1279:							extra_ies, extra_ies_len);
1280:			break;
1281:		case WLAN_TDLS_TEARDOWN:
1282:			ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
1283:							   action_code, dialog_token,
1284:							   status_code,
1285:							   peer_capability, initiator,
1286:							   extra_ies, extra_ies_len);
1287:			break;
1288:		case WLAN_TDLS_DISCOVERY_REQUEST:
1289:			/*
1290:			 * Protect the discovery so we can hear the TDLS discovery
1291:			 * response frame. It is transmitted directly and not buffered
1292:			 * by the AP.
1293:			 */
1294:			drv_mgd_protect_tdls_discover(sdata->local, sdata, link_id);
1295:			fallthrough;
1296:		case WLAN_TDLS_SETUP_CONFIRM:
1297:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1298:			/* no special handling */
1299:			ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
1300:							      link_id, action_code,
1301:							      dialog_token,
1302:							      status_code,
1303:							      peer_capability,
1304:							      initiator, extra_ies,
1305:							      extra_ies_len, 0, NULL);
1306:			break;
1307:		default:
1308:			ret = -EOPNOTSUPP;
1309:			break;
1310:		}
1311:	
1312:		tdls_dbg(sdata, "TDLS mgmt action %d peer %pM link_id %d status %d\n",
1313:			 action_code, peer, link_id, ret);
1314:		return ret;
1315:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3.1-pro-preview

							input: 66770
							output: 62
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeSnippetLines:0 Name:ieee80211_tdls_mgmt SourceTreePrefix:]

map[References:<nil> TruncatedOutput:false]

gemini-3.1-pro-preview

							input: 66849
							output: 62
							thoughts: 0
						

map[ContextFile:net/mac80211/tdls.c IncludeSnippetLines:0 Name:ieee80211_tdls_mgmt SourceTreePrefix:]

map[References:<nil> TruncatedOutput:false]

gemini-3.1-pro-preview

							input: 66928
							output: 26
							thoughts: 0
						

map[Expression:ieee80211_tdls_mgmt]

map[Output:net/mac80211/cfg.c=5556=const struct cfg80211_ops mac80211_config_ops = {
--
net/mac80211/cfg.c-5628-	.tdls_oper = ieee80211_tdls_oper,
net/mac80211/cfg.c:5629:	.tdls_mgmt = ieee80211_tdls_mgmt,
net/mac80211/cfg.c-5630-	.tdls_channel_switch = ieee80211_tdls_channel_switch,
--
net/mac80211/ieee80211_i.h=2798=void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
--
net/mac80211/ieee80211_i.h-2801-/* TDLS */
net/mac80211/ieee80211_i.h:2802:int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/ieee80211_i.h-2803-			const u8 *peer, int link_id,
--
net/mac80211/tdls.c=1135=static int
net/mac80211/tdls.c:1136:ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1137-			  const u8 *peer, int link_id,
--
net/mac80211/tdls.c=1206=static int
net/mac80211/tdls.c:1207:ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1208-			     const u8 *peer, int link_id,
--
net/mac80211/tdls.c-1254-
net/mac80211/tdls.c:1255:int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1256-			const u8 *peer, int link_id,
--
net/mac80211/tdls.c-1274-	case WLAN_TDLS_SETUP_RESPONSE:
net/mac80211/tdls.c:1275:		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
net/mac80211/tdls.c-1276-						link_id, action_code,
--
net/mac80211/tdls.c-1281-	case WLAN_TDLS_TEARDOWN:
net/mac80211/tdls.c:1282:		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
net/mac80211/tdls.c-1283-						   action_code, dialog_token,
--
net/mac80211/tdls.c=1412=int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1464-		/*
net/mac80211/tdls.c:1465:		 * The teardown message in ieee80211_tdls_mgmt_teardown() was
net/mac80211/tdls.c-1466-		 * created while the queues were stopped, so it might still be
]

gemini-3.1-pro-preview

							input: 68007
							output: 59
							thoughts: 0
						

map[ContextFile:net/mac80211/cfg.c IncludeSnippetLines:0 Name:mac80211_config_ops SourceTreePrefix:]

map[References:<nil> TruncatedOutput:false]

gemini-3.1-pro-preview

							input: 68083
							output: 24
							thoughts: 0
						

map[Expression:mac80211_config_ops]

map[Output:net/mac80211/cfg.c=5549=ieee80211_set_epcs(struct wiphy *wiphy, struct net_device *dev, bool enable)
--
net/mac80211/cfg.c-5555-
net/mac80211/cfg.c:5556:const struct cfg80211_ops mac80211_config_ops = {
net/mac80211/cfg.c-5557-	.add_virtual_intf = ieee80211_add_iface,
--
net/mac80211/ieee80211_i.h-38-
net/mac80211/ieee80211_i.h:39:extern const struct cfg80211_ops mac80211_config_ops;
net/mac80211/ieee80211_i.h-40-
--
net/mac80211/main.c=791=struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
--
net/mac80211/main.c-850-
net/mac80211/main.c:851:	wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
net/mac80211/main.c-852-
]

gemini-3.1-pro-preview

							input: 68510
							output: 18
							thoughts: 0
						

map[Expression:tdls_mgmt]

map[Output:drivers/net/wireless/marvell/mwifiex/cfg80211.c=3748=static int mwifiex_cfg80211_set_coalesce(struct wiphy *wiphy,
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3781-
drivers/net/wireless/marvell/mwifiex/cfg80211.c:3782:/* cfg80211 ops handler for tdls_mgmt.
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3783- * Function prepares TDLS action frame packets and forwards them to FW
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c=3785=static int
drivers/net/wireless/marvell/mwifiex/cfg80211.c:3786:mwifiex_cfg80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3787-			   const u8 *peer, int link_id, u8 action_code,
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c=4570=static const struct cfg80211_ops mwifiex_cfg80211_ops = {
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c-4611-	.set_coalesce = mwifiex_cfg80211_set_coalesce,
drivers/net/wireless/marvell/mwifiex/cfg80211.c:4612:	.tdls_mgmt = mwifiex_cfg80211_tdls_mgmt,
drivers/net/wireless/marvell/mwifiex/cfg80211.c-4613-	.tdls_oper = mwifiex_cfg80211_tdls_oper,
--
include/net/cfg80211.h=4482=struct mgmt_frame_regs {
--
include/net/cfg80211.h-4745- *
include/net/cfg80211.h:4746: * @tdls_mgmt: Transmit a TDLS management frame.
include/net/cfg80211.h-4747- * @tdls_oper: Perform a high-level TDLS operation (e.g. TDLS link setup).
--
include/net/cfg80211.h=4901=struct cfg80211_ops {
--
include/net/cfg80211.h-5126-
include/net/cfg80211.h:5127:	int	(*tdls_mgmt)(struct wiphy *wiphy, struct net_device *dev,
include/net/cfg80211.h-5128-			     const u8 *peer, int link_id,
--
include/uapi/linux/nl80211.h=7169=struct nl80211_vendor_cmd_info {
--
include/uapi/linux/nl80211.h-7176- *
include/uapi/linux/nl80211.h:7177: * Used by tdls_mgmt() to determine which conditional elements need
include/uapi/linux/nl80211.h-7178- * to be added to TDLS Setup frames.
--
net/mac80211/cfg.c=5556=const struct cfg80211_ops mac80211_config_ops = {
--
net/mac80211/cfg.c-5628-	.tdls_oper = ieee80211_tdls_oper,
net/mac80211/cfg.c:5629:	.tdls_mgmt = ieee80211_tdls_mgmt,
net/mac80211/cfg.c-5630-	.tdls_channel_switch = ieee80211_tdls_channel_switch,
--
net/mac80211/ieee80211_i.h=2798=void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
--
net/mac80211/ieee80211_i.h-2801-/* TDLS */
net/mac80211/ieee80211_i.h:2802:int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/ieee80211_i.h-2803-			const u8 *peer, int link_id,
--
net/mac80211/tdls.c=1135=static int
net/mac80211/tdls.c:1136:ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1137-			  const u8 *peer, int link_id,
--
net/mac80211/tdls.c=1206=static int
net/mac80211/tdls.c:1207:ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1208-			     const u8 *peer, int link_id,
--
net/mac80211/tdls.c-1254-
net/mac80211/tdls.c:1255:int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1256-			const u8 *peer, int link_id,
--
net/mac80211/tdls.c-1274-	case WLAN_TDLS_SETUP_RESPONSE:
net/mac80211/tdls.c:1275:		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
net/mac80211/tdls.c-1276-						link_id, action_code,
--
net/mac80211/tdls.c-1281-	case WLAN_TDLS_TEARDOWN:
net/mac80211/tdls.c:1282:		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
net/mac80211/tdls.c-1283-						   action_code, dialog_token,
--
net/mac80211/tdls.c=1412=int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1464-		/*
net/mac80211/tdls.c:1465:		 * The teardown message in ieee80211_tdls_mgmt_teardown() was
net/mac80211/tdls.c-1466-		 * created while the queues were stopped, so it might still be
--
net/wireless/nl80211.c=2217=static int nl80211_add_commands_unsplit(struct cfg80211_registered_device *rdev,
--
net/wireless/nl80211.c-2260-	if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
net/wireless/nl80211.c:2261:		CMD(tdls_mgmt, TDLS_MGMT);
net/wireless/nl80211.c-2262-		CMD(tdls_oper, TDLS_OPER);
--
net/wireless/nl80211.c=13676=static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
--
net/wireless/nl80211.c-13690-
net/wireless/nl80211.c:13691:static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
net/wireless/nl80211.c-13692-{
--
net/wireless/nl80211.c-13702-	if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
net/wireless/nl80211.c:13703:	    !rdev->ops->tdls_mgmt)
net/wireless/nl80211.c-13704-		return -EOPNOTSUPP;
--
net/wireless/nl80211.c-13722-
net/wireless/nl80211.c:13723:	return rdev_tdls_mgmt(rdev, dev, peer, link_id, action_code,
net/wireless/nl80211.c-13724-			      dialog_token, status_code, peer_capability,
--
net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
--
net/wireless/nl80211.c-18798-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
net/wireless/nl80211.c:18799:		.doit = nl80211_tdls_mgmt,
net/wireless/nl80211.c-18800-		.flags = GENL_UNS_ADMIN_PERM,
--
net/wireless/rdev-ops.h=910=static inline int rdev_set_rekey_data(struct cfg80211_registered_device *rdev,
--
net/wireless/rdev-ops.h-920-
net/wireless/rdev-ops.h:921:static inline int rdev_tdls_mgmt(struct cfg80211_registered_device *rdev,
net/wireless/rdev-ops.h-922-				 struct net_device *dev, u8 *peer,
--
net/wireless/rdev-ops.h-928-	int ret;
net/wireless/rdev-ops.h:929:	trace_rdev_tdls_mgmt(&rdev->wiphy, dev, peer, link_id, action_code,
net/wireless/rdev-ops.h-930-			     dialog_token, status_code, peer_capability,
net/wireless/rdev-ops.h-931-			     initiator, buf, len);
net/wireless/rdev-ops.h:932:	ret = rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, link_id,
net/wireless/rdev-ops.h-933-				   action_code, dialog_token, status_code,
--
net/wireless/trace.h=1966=DEFINE_EVENT(wiphy_netdev_id_evt, rdev_sched_scan_stop,
--
net/wireless/trace.h-1970-
net/wireless/trace.h:1971:TRACE_EVENT(rdev_tdls_mgmt,
net/wireless/trace.h-1972-	TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
]

gemini-3.1-pro-preview

							input: 71607
							output: 52
							thoughts: 0
						

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_tdls_mgmt]

map[SourceCode:13691:	static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
13692:	{
13693:		struct cfg80211_registered_device *rdev = info->user_ptr[0];
13694:		struct net_device *dev = info->user_ptr[1];
13695:		u8 action_code, dialog_token;
13696:		u32 peer_capability = 0;
13697:		u16 status_code;
13698:		u8 *peer;
13699:		int link_id;
13700:		bool initiator;
13701:	
13702:		if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
13703:		    !rdev->ops->tdls_mgmt)
13704:			return -EOPNOTSUPP;
13705:	
13706:		if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
13707:		    !info->attrs[NL80211_ATTR_STATUS_CODE] ||
13708:		    !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
13709:		    !info->attrs[NL80211_ATTR_IE] ||
13710:		    !info->attrs[NL80211_ATTR_MAC])
13711:			return -EINVAL;
13712:	
13713:		peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
13714:		action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
13715:		status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
13716:		dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
13717:		initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
13718:		if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
13719:			peer_capability =
13720:				nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
13721:		link_id = nl80211_link_id_or_invalid(info->attrs);
13722:	
13723:		return rdev_tdls_mgmt(rdev, dev, peer, link_id, action_code,
13724:				      dialog_token, status_code, peer_capability,
13725:				      initiator,
13726:				      nla_data(info->attrs[NL80211_ATTR_IE]),
13727:				      nla_len(info->attrs[NL80211_ATTR_IE]));
13728:	}
 SourceFile:net/wireless/nl80211.c]

gemini-3.1-pro-preview

							input: 72563
							output: 60
							thoughts: 0
						

map[ContextFile:net/wireless/nl80211.c IncludeSnippetLines:0 Name:nl80211_tdls_mgmt SourceTreePrefix:]

map[References:<nil> TruncatedOutput:false]

gemini-3.1-pro-preview

							input: 72640
							output: 25
							thoughts: 0
						

map[Expression:nl80211_tdls_mgmt]

map[Output:net/wireless/nl80211.c=13676=static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
--
net/wireless/nl80211.c-13690-
net/wireless/nl80211.c:13691:static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
net/wireless/nl80211.c-13692-{
--
net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
--
net/wireless/nl80211.c-18798-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
net/wireless/nl80211.c:18799:		.doit = nl80211_tdls_mgmt,
net/wireless/nl80211.c-18800-		.flags = GENL_UNS_ADMIN_PERM,
]

gemini-3.1-pro-preview

							input: 73617
							output: 24
							thoughts: 114
						

**Analyzing the Bug Trigger**

Okay, so the trail starts with `nl80211_tdls_mgmt`. That's where things are going south, and it's being accessed via netlink, which is standard. The netlink command itself is `NL80211_CMD_TDLS_MGMT`. Right, and the relevant flags for this particular command are `GENL_UNS_ADMIN_PERM`. Now, hold on a second... `GENL_UNS_ADMIN_PERM`... that flag screams "CAP_NET_ADMIN" requirement in the user namespace. Let me quickly double-check the definition of `GENL_UNS_ADMIN_PERM` just to confirm my initial assessment. I need to make sure I haven't missed anything obvious.

map[Expression:GENL_UNS_ADMIN_PERM]

map[Output:
Full output is too long, showing 500 out of 759 lines.
Use more precise expression if possible.

[drivers/net/ieee802154/mac802154_hwsim.c=751=static const struct genl_small_ops hwsim_nl_ops[] = {
 --
 drivers/net/ieee802154/mac802154_hwsim.c-755-		.doit = hwsim_new_radio_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:756:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-757-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-761-		.doit = hwsim_del_radio_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:762:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-763-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-773-		.doit = hwsim_new_edge_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:774:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-775-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-779-		.doit = hwsim_del_edge_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:780:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-781-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-785-		.doit = hwsim_set_edge_lqi,
 drivers/net/ieee802154/mac802154_hwsim.c:786:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-787-	},
 --
 drivers/net/wireguard/generated/netlink.c=56=const struct genl_split_ops wireguard_nl_ops[2] = {
 --
 drivers/net/wireguard/generated/netlink.c-63-		.maxattr	= WGDEVICE_A_IFNAME,
 drivers/net/wireguard/generated/netlink.c:64:		.flags		= GENL_UNS_ADMIN_PERM | GENL_CMD_CAP_DUMP,
 drivers/net/wireguard/generated/netlink.c-65-	},
 --
 drivers/net/wireguard/generated/netlink.c-70-		.maxattr	= WGDEVICE_A_PEERS,
 drivers/net/wireguard/generated/netlink.c:71:		.flags		= GENL_UNS_ADMIN_PERM | GENL_CMD_CAP_DO,
 drivers/net/wireguard/generated/netlink.c-72-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c=6651=static const struct genl_small_ops hwsim_ops[] = {
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6655-		.doit = hwsim_register_received_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6656:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6657-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6671-		.doit = hwsim_new_radio_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6672:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6673-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6677-		.doit = hwsim_del_radio_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6678:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6679-	},
 --
 include/net/genetlink.h=173=enum genl_validate_flags {
 --
 include/net/genetlink.h-182- * @internal_flags: flags used by the family
 include/net/genetlink.h:183: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-184- * @validate: validation flags from enum genl_validate_flags
 --
 include/net/genetlink.h=191=struct genl_small_ops {
 --
 include/net/genetlink.h-203- * @internal_flags: flags used by the family
 include/net/genetlink.h:204: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-205- * @maxattr: maximum number of attributes supported
 --
 include/net/genetlink.h=213=struct genl_ops {
 --
 include/net/genetlink.h-231- * @internal_flags: flags used by the family
 include/net/genetlink.h:232: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-233- * @validate: validation flags from enum genl_validate_flags
 --
 include/uapi/linux/genetlink.h=13=struct genlmsghdr {
 --
 include/uapi/linux/genetlink.h-24-#define GENL_CMD_CAP_HASPOL	0x08
 include/uapi/linux/genetlink.h:25:#define GENL_UNS_ADMIN_PERM	0x10
 include/uapi/linux/genetlink.h-26-
 --
 net/batman-adv/netlink.c=1400=static const struct genl_small_ops batadv_netlink_ops[] = {
 --
 net/batman-adv/netlink.c-1410-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1411:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1412-		.doit = batadv_netlink_tp_meter_start,
 --
 net/batman-adv/netlink.c-1417-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1418:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1419-		.doit = batadv_netlink_tp_meter_cancel,
 --
 net/batman-adv/netlink.c-1424-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1425:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1426-		.dumpit = batadv_algo_dump,
 --
 net/batman-adv/netlink.c-1439-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1440:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1441-		.dumpit = batadv_tt_local_dump,
 --
 net/batman-adv/netlink.c-1445-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1446:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1447-		.dumpit = batadv_tt_global_dump,
 --
 net/batman-adv/netlink.c-1451-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1452:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1453-		.dumpit = batadv_orig_dump,
 --
 net/batman-adv/netlink.c-1457-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1458:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1459-		.dumpit = batadv_hardif_neigh_dump,
 --
 net/batman-adv/netlink.c-1463-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1464:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1465-		.dumpit = batadv_gw_dump,
 --
 net/batman-adv/netlink.c-1469-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1470:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1471-		.dumpit = batadv_bla_claim_dump,
 --
 net/batman-adv/netlink.c-1475-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1476:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1477-		.dumpit = batadv_bla_backbone_dump,
 --
 net/batman-adv/netlink.c-1481-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1482:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1483-		.dumpit = batadv_dat_cache_dump,
 --
 net/batman-adv/netlink.c-1487-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1488:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1489-		.dumpit = batadv_mcast_flags_dump,
 --
 net/batman-adv/netlink.c-1493-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1494:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1495-		.doit = batadv_netlink_set_mesh,
 --
 net/batman-adv/netlink.c-1500-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1501:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1502-		.doit = batadv_netlink_set_hardif,
 --
 net/batman-adv/netlink.c-1516-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1517:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1518-		.doit = batadv_netlink_set_vlan,
 --
 net/ethtool/netlink.c=1133=static const struct genl_ops ethtool_genl_ops[] = {
 --
 net/ethtool/netlink.c-1153-		.cmd	= ETHTOOL_MSG_LINKINFO_SET,
 net/ethtool/netlink.c:1154:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1155-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1169-		.cmd	= ETHTOOL_MSG_LINKMODES_SET,
 net/ethtool/netlink.c:1170:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1171-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1194-		.cmd	= ETHTOOL_MSG_DEBUG_SET,
 net/ethtool/netlink.c:1195:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1196-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1201-		.cmd	= ETHTOOL_MSG_WOL_GET,
 net/ethtool/netlink.c:1202:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1203-		.doit	= ethnl_default_doit,
 --
 net/ethtool/netlink.c-1211-		.cmd	= ETHTOOL_MSG_WOL_SET,
 net/ethtool/netlink.c:1212:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1213-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1227-		.cmd	= ETHTOOL_MSG_FEATURES_SET,
 net/ethtool/netlink.c:1228:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1229-		.doit	= ethnl_set_features,
 --
 net/ethtool/netlink.c-1243-		.cmd	= ETHTOOL_MSG_PRIVFLAGS_SET,
 net/ethtool/netlink.c:1244:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1245-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1259-		.cmd	= ETHTOOL_MSG_RINGS_SET,
 net/ethtool/netlink.c:1260:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1261-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1275-		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
 net/ethtool/netlink.c:1276:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1277-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1291-		.cmd	= ETHTOOL_MSG_COALESCE_SET,
 net/ethtool/netlink.c:1292:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1293-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1307-		.cmd	= ETHTOOL_MSG_PAUSE_SET,
 net/ethtool/netlink.c:1308:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1309-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1323-		.cmd	= ETHTOOL_MSG_EEE_SET,
 net/ethtool/netlink.c:1324:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1325-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1339-		.cmd	= ETHTOOL_MSG_CABLE_TEST_ACT,
 net/ethtool/netlink.c:1340:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1341-		.doit	= ethnl_act_cable_test,
 --
 net/ethtool/netlink.c-1346-		.cmd	= ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
 net/ethtool/netlink.c:1347:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1348-		.doit	= ethnl_act_cable_test_tdr,
 --
 net/ethtool/netlink.c-1370-		.cmd	= ETHTOOL_MSG_FEC_SET,
 net/ethtool/netlink.c:1371:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1372-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1377-		.cmd	= ETHTOOL_MSG_MODULE_EEPROM_GET,
 net/ethtool/netlink.c:1378:		.flags  = GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1379-		.doit	= ethnl_default_doit,
 --
 net/ethtool/netlink.c-1414-		.cmd	= ETHTOOL_MSG_MODULE_SET,
 net/ethtool/netlink.c:1415:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1416-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1430-		.cmd	= ETHTOOL_MSG_PSE_SET,
 net/ethtool/netlink.c:1431:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1432-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1454-		.cmd	= ETHTOOL_MSG_PLCA_SET_CFG,
 net/ethtool/netlink.c:1455:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1456-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1479-		.cmd	= ETHTOOL_MSG_MM_SET,
 net/ethtool/netlink.c:1480:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1481-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1486-		.cmd	= ETHTOOL_MSG_MODULE_FW_FLASH_ACT,
 net/ethtool/netlink.c:1487:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1488-		.doit	= ethnl_act_module_fw_flash,
 --
 net/ethtool/netlink.c-1511-		.cmd	= ETHTOOL_MSG_TSCONFIG_SET,
 net/ethtool/netlink.c:1512:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1513-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1518-		.cmd	= ETHTOOL_MSG_RSS_SET,
 net/ethtool/netlink.c:1519:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1520-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1525-		.cmd	= ETHTOOL_MSG_RSS_CREATE_ACT,
 net/ethtool/netlink.c:1526:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1527-		.doit	= ethnl_rss_create_doit,
 --
 net/ethtool/netlink.c-1532-		.cmd	= ETHTOOL_MSG_RSS_DELETE_ACT,
 net/ethtool/netlink.c:1533:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1534-		.doit	= ethnl_rss_delete_doit,
 --
 net/l2tp/l2tp_netlink.c=935=static const struct genl_small_ops l2tp_nl_ops[] = {
 --
 net/l2tp/l2tp_netlink.c-945-		.doit = l2tp_nl_cmd_tunnel_create,
 net/l2tp/l2tp_netlink.c:946:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-947-	},
 --
 net/l2tp/l2tp_netlink.c-951-		.doit = l2tp_nl_cmd_tunnel_delete,
 net/l2tp/l2tp_netlink.c:952:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-953-	},
 --
 net/l2tp/l2tp_netlink.c-957-		.doit = l2tp_nl_cmd_tunnel_modify,
 net/l2tp/l2tp_netlink.c:958:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-959-	},
 --
 net/l2tp/l2tp_netlink.c-964-		.dumpit = l2tp_nl_cmd_tunnel_dump,
 net/l2tp/l2tp_netlink.c:965:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-966-	},
 --
 net/l2tp/l2tp_netlink.c-970-		.doit = l2tp_nl_cmd_session_create,
 net/l2tp/l2tp_netlink.c:971:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-972-	},
 --
 net/l2tp/l2tp_netlink.c-976-		.doit = l2tp_nl_cmd_session_delete,
 net/l2tp/l2tp_netlink.c:977:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-978-	},
 --
 net/l2tp/l2tp_netlink.c-982-		.doit = l2tp_nl_cmd_session_modify,
 net/l2tp/l2tp_netlink.c:983:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-984-	},
 --
 net/l2tp/l2tp_netlink.c-989-		.dumpit = l2tp_nl_cmd_session_dump,
 net/l2tp/l2tp_netlink.c:990:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-991-	},
 --
 net/mptcp/mptcp_pm_gen.c=92=const struct genl_ops mptcp_pm_nl_ops[11] = {
 --
 net/mptcp/mptcp_pm_gen.c-98-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:99:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-100-	},
 --
 net/mptcp/mptcp_pm_gen.c-106-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:107:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-108-	},
 --
 net/mptcp/mptcp_pm_gen.c-122-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:123:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-124-	},
 --
 net/mptcp/mptcp_pm_gen.c-130-		.maxattr	= MPTCP_PM_ATTR_SUBFLOWS,
 net/mptcp/mptcp_pm_gen.c:131:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-132-	},
 --
 net/mptcp/mptcp_pm_gen.c-145-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:146:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-147-	},
 --
 net/mptcp/mptcp_pm_gen.c-153-		.maxattr	= MPTCP_PM_ATTR_TOKEN,
 net/mptcp/mptcp_pm_gen.c:154:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-155-	},
 --
 net/mptcp/mptcp_pm_gen.c-161-		.maxattr	= MPTCP_PM_ATTR_LOC_ID,
 net/mptcp/mptcp_pm_gen.c:162:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-163-	},
 --
 net/mptcp/mptcp_pm_gen.c-169-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:170:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-171-	},
 --
 net/mptcp/mptcp_pm_gen.c-177-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:178:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-179-	},
 --
 net/netlink/genetlink.c=1155=static int genl_family_rcv_msg(const struct genl_family *family,
 --
 net/netlink/genetlink.c-1185-
 net/netlink/genetlink.c:1186:	if ((op.flags & GENL_UNS_ADMIN_PERM) &&
 net/netlink/genetlink.c-1187-	    !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
 --
 net/openvswitch/conntrack.c=1956=static const struct genl_small_ops ct_limit_genl_ops[] = {
 --
 net/openvswitch/conntrack.c-1958-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/conntrack.c:1959:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/conntrack.c-1960-					       * privilege.
 --
 net/openvswitch/conntrack.c-1965-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/conntrack.c:1966:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/conntrack.c-1967-					       * privilege.
 --
 net/openvswitch/datapath.c=730=static const struct genl_small_ops dp_packet_genl_ops[] = {
 --
 net/openvswitch/datapath.c-732-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:733:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-734-	  .doit = ovs_packet_cmd_execute
 --
 net/openvswitch/datapath.c=1539=static const struct genl_small_ops dp_flow_genl_ops[] = {
 --
 net/openvswitch/datapath.c-1541-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1542:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1543-	  .doit = ovs_flow_cmd_new
 --
 net/openvswitch/datapath.c-1546-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1547:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1548-	  .doit = ovs_flow_cmd_del
 --
 net/openvswitch/datapath.c-1557-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1558:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1559-	  .doit = ovs_flow_cmd_set,
 --
 net/openvswitch/datapath.c=2085=static const struct genl_small_ops dp_datapath_genl_ops[] = {
 --
 net/openvswitch/datapath.c-2087-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2088:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2089-	  .doit = ovs_dp_cmd_new
 --
 net/openvswitch/datapath.c-2092-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2093:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2094-	  .doit = ovs_dp_cmd_del
 --
 net/openvswitch/datapath.c-2103-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2104:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2105-	  .doit = ovs_dp_cmd_set,
 --
 net/openvswitch/datapath.c=2582=static const struct genl_small_ops dp_vport_genl_ops[] = {
 --
 net/openvswitch/datapath.c-2584-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2585:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2586-	  .doit = ovs_vport_cmd_new
 --
 net/openvswitch/datapath.c-2589-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2590:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2591-	  .doit = ovs_vport_cmd_del
 --
 net/openvswitch/datapath.c-2600-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2601:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2602-	  .doit = ovs_vport_cmd_set,
 --
 net/openvswitch/meter.c=682=static const struct genl_small_ops dp_meter_genl_ops[] = {
 --
 net/openvswitch/meter.c-689-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/meter.c:690:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/meter.c-691-					       *  privilege.
 --
 net/openvswitch/meter.c-701-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/meter.c:702:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/meter.c-703-					       *  privilege.
 --
 net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
 --
 net/wireless/nl80211.c-18313-		.doit = nl80211_set_wiphy,
 net/wireless/nl80211.c:18314:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18315-	},
 --
 net/wireless/nl80211.c-18327-		.doit = nl80211_set_interface,
 net/wireless/nl80211.c:18328:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18329-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
 --
 net/wireless/nl80211.c-18335-		.doit = nl80211_new_interface,
 net/wireless/nl80211.c:18336:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18337-		.internal_flags =
 --
 net/wireless/nl80211.c-18346-		.doit = nl80211_del_interface,
 net/wireless/nl80211.c:18347:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18348-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
 --
 net/wireless/nl80211.c-18354-		.doit = nl80211_get_key,
 net/wireless/nl80211.c:18355:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18356-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18361-		.doit = nl80211_set_key,
 net/wireless/nl80211.c:18362:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18363-		/* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on key */
 --
 net/wireless/nl80211.c-18370-		.doit = nl80211_new_key,
 net/wireless/nl80211.c:18371:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18372-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18378-		.doit = nl80211_del_key,
 net/wireless/nl80211.c:18379:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18380-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18384-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18385:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18386-		.doit = nl80211_set_beacon,
 --
 net/wireless/nl80211.c-18392-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18393:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18394-		.doit = nl80211_start_ap,
 --
 net/wireless/nl80211.c-18400-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18401:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18402-		.doit = nl80211_stop_ap,
 --
 net/wireless/nl80211.c-18416-		.doit = nl80211_set_station,
 net/wireless/nl80211.c:18417:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18418-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18423-		.doit = nl80211_new_station,
 net/wireless/nl80211.c:18424:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18425-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18430-		.doit = nl80211_del_station,
 net/wireless/nl80211.c:18431:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18432-		/* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on
 --
 net/wireless/nl80211.c-18442-		.dumpit = nl80211_dump_mpath,
 net/wireless/nl80211.c:18443:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18444-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18450-		.dumpit = nl80211_dump_mpp,
 net/wireless/nl80211.c:18451:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18452-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18457-		.doit = nl80211_set_mpath,
 net/wireless/nl80211.c:18458:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18459-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18464-		.doit = nl80211_new_mpath,
 net/wireless/nl80211.c:18465:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18466-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18471-		.doit = nl80211_del_mpath,
 net/wireless/nl80211.c:18472:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18473-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18478-		.doit = nl80211_set_bss,
 net/wireless/nl80211.c:18479:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18480-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18520-		.doit = nl80211_update_mesh_config,
 net/wireless/nl80211.c:18521:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18522-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18527-		.doit = nl80211_trigger_scan,
 net/wireless/nl80211.c:18528:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18529-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
 --
 net/wireless/nl80211.c-18534-		.doit = nl80211_abort_scan,
 net/wireless/nl80211.c:18535:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18536-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
 --
 net/wireless/nl80211.c-18546-		.doit = nl80211_start_sched_scan,
 net/wireless/nl80211.c:18547:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18548-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18553-		.doit = nl80211_stop_sched_scan,
 net/wireless/nl80211.c:18554:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18555-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18560-		.doit = nl80211_authenticate,
 net/wireless/nl80211.c:18561:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18562-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18568-		.doit = nl80211_associate,
 net/wireless/nl80211.c:18569:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18570-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18576-		.doit = nl80211_deauthenticate,
 net/wireless/nl80211.c:18577:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18578-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18583-		.doit = nl80211_disassociate,
 net/wireless/nl80211.c:18584:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18585-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18590-		.doit = nl80211_join_ibss,
 net/wireless/nl80211.c:18591:		.flags = GENL_UNS_ADMIN_PERM,
]
]

gemini-3.1-pro-preview

							input: 87278
							output: 27
							thoughts: 973
						

**Analyzing the Security Implications of GENL_UNS_ADMIN_PERM**

Okay, let's break this down. `GENL_UNS_ADMIN_PERM` is `0x10`. In the `genl_family_rcv_msg` function, the check `(op.flags & GENL_UNS_ADMIN_PERM) && !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)` confirms that this permission requires `CAP_NET_ADMIN` within the network namespace of the socket. Usually, that network namespace is the same as the user namespace that created it.

The bug report asks if this is accessible from user namespaces where a process *has* all capabilities. The `ns_capable()` function confirms that it does require `CAP_NET_ADMIN`, so it's accessible *if* the process already possesses the capability, and yes, the code confirms the bug is reproducible with a user namespace process with capabilities.

The critical question is, can this be exploited by an unprivileged process? No, because, clearly, `CAP_NET_ADMIN` is needed. However, the reproducer uses `syz_genetlink_get_family_id` and `sendmsg` on a netlink socket and the provided code shows some mmap calls followed by a socket call. There's an ioctl and then a sendmsg. Finally, there is the call `syz_80211_inject_frame`.

Hold on. The reproducer *doesn't* use `unshare` or `clone` to create a new user namespace. So, how does it get `CAP_NET_ADMIN`? Ah, right. It's likely that syzkaller, which runs the reproducer, is being run as root, or within a sandbox that *already* has `CAP_NET_ADMIN`. That's important.

But, the *actual* question is whether a typical, non-root user process *without* special capabilities can exploit this. Since the code explicitly checks for `GENL_UNS_ADMIN_PERM`, which in turn requires `CAP_NET_ADMIN` within the current namespace, the answer is definitively NO. It's not accessible to unprivileged processes.

Let's do a quick double-check though. Specifically, is `NL80211_CMD_TDLS_MGMT` one of the commands that uses `GENL_UNS_ADMIN_PERM`? Let's check `nl80211_small_ops` for the `NL80211_CMD_TDLS_MGMT` command to confirm.

map[Expression:NL80211_CMD_TDLS_MGMT]

map[Output:include/net/cfg80211.h=4901=struct cfg80211_ops {
--
include/net/cfg80211.h-5304- *	link setup/discovery operations internally. Setup, discovery and
include/net/cfg80211.h:5305: *	teardown packets should be sent through the @NL80211_CMD_TDLS_MGMT
include/net/cfg80211.h-5306- *	command. When this flag is not set, @NL80211_CMD_TDLS_OPER should be
--
include/uapi/linux/nl80211.h-896- *	%NL80211_TDLS_TEARDOWN).
include/uapi/linux/nl80211.h:897: * @NL80211_CMD_TDLS_MGMT: Send a TDLS management frame. The
include/uapi/linux/nl80211.h-898- *	%NL80211_ATTR_TDLS_ACTION attribute determines the type of frame to be
--
include/uapi/linux/nl80211.h=1367=enum nl80211_commands {
--
include/uapi/linux/nl80211.h-1492-	NL80211_CMD_TDLS_OPER,
include/uapi/linux/nl80211.h:1493:	NL80211_CMD_TDLS_MGMT,
include/uapi/linux/nl80211.h-1494-
--
include/uapi/linux/nl80211.h-2153- *	procedures should be performed by sending TDLS packets via
include/uapi/linux/nl80211.h:2154: *	%NL80211_CMD_TDLS_MGMT. Otherwise %NL80211_CMD_TDLS_OPER should be
include/uapi/linux/nl80211.h-2155- *	used for asking the driver to perform a TDLS operation.
--
net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
--
net/wireless/nl80211.c-18796-	{
net/wireless/nl80211.c:18797:		.cmd = NL80211_CMD_TDLS_MGMT,
net/wireless/nl80211.c-18798-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
]

gemini-3.1-pro-preview

							input: 87838
							output: 65
							thoughts: 0
						

map[Question:Is NL80211_CMD_TDLS_MGMT accessible to unprivileged users? I see it has GENL_UNS_ADMIN_PERM flag. Does it mean it requires CAP_NET_ADMIN in the user namespace?]

map[Answer:The `NL80211_CMD_TDLS_MGMT` command is indeed flagged with `GENL_UNS_ADMIN_PERM` in the `nl80211` generic netlink family.

### What `GENL_UNS_ADMIN_PERM` means
In the generic netlink core (`net/netlink/genetlink.c`), the `GENL_UNS_ADMIN_PERM` flag is handled as follows:

```c
if ((op.flags & GENL_UNS_ADMIN_PERM) &&
    !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
        return -EPERM;
```

This means that the command requires the `CAP_NET_ADMIN` capability within the **user namespace** that owns the **network namespace** where the request is being processed.

### Accessibility to unprivileged users
The accessibility depends on the context of the user:

1.  **In the initial user/network namespace:**
    An unprivileged user does **not** have `CAP_NET_ADMIN` in the initial user namespace. Therefore, they **cannot** access `NL80211_CMD_TDLS_MGMT` in the root network namespace.

2.  **In a user-created namespace:**
    If an unprivileged user creates a new user namespace and a new network namespace (e.g., using `unshare -un`), they **do** have `CAP_NET_ADMIN` within that new user namespace. In this context, they **can** access `NL80211_CMD_TDLS_MGMT`.

### Practical implications
While an unprivileged user can technically access the command by creating their own namespaces, they can only use it to manage wireless devices that are present in their network namespace.
*   **Physical devices:** Moving a physical wireless device (`wiphy`) from the initial network namespace to a user-created network namespace requires `CAP_NET_ADMIN` in the **initial** user namespace. Thus, an unprivileged user cannot typically "steal" a physical Wi-Fi card to manage it in their own namespace.
*   **Virtual devices:** An unprivileged user can create virtual wireless devices (e.g., using `mac80211_hwsim`, which also uses `GENL_UNS_ADMIN_PERM` for radio creation) within their own namespace and then use `NL80211_CMD_TDLS_MGMT` on them.

### Summary
*   **Does it require `CAP_NET_ADMIN` in the user namespace?** Yes, specifically the user namespace that owns the network namespace associated with the netlink socket.
*   **Is it accessible to unprivileged users?** Only if they are operating within a user namespace they have created (or otherwise have `CAP_NET_ADMIN` in), and only for devices available in that namespace. It is **not** accessible to unprivileged users for managing devices in the system's default (root) network namespace.]

gemini-3-flash-preview

You are a capable Linux kernel developer tasked with researching complex questions
about kernel source code. You will be given a concrete question, and need to provide
a concrete answer.
Use tools extensively while researching the question. Don't make assumptions,
or rely on your previous knowledge about the kernel source code, use available tools
to access the actual source code.
Use all available sources of information:
 - kernel source code
 - documentation in the Documentation dir in the source tree
 - git commits descriptions, git blame

Prefer calling several tools at the same time to save round-trips.

Is NL80211_CMD_TDLS_MGMT accessible to unprivileged users? I see it has GENL_UNS_ADMIN_PERM flag. Does it mean it requires CAP_NET_ADMIN in the user namespace?

The `NL80211_CMD_TDLS_MGMT` command is indeed flagged with `GENL_UNS_ADMIN_PERM` in the `nl80211` generic netlink family.

### What `GENL_UNS_ADMIN_PERM` means
In the generic netlink core (`net/netlink/genetlink.c`), the `GENL_UNS_ADMIN_PERM` flag is handled as follows:

```c
if ((op.flags & GENL_UNS_ADMIN_PERM) &&
    !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
        return -EPERM;
```

This means that the command requires the `CAP_NET_ADMIN` capability within the **user namespace** that owns the **network namespace** where the request is being processed.

### Accessibility to unprivileged users
The accessibility depends on the context of the user:

1.  **In the initial user/network namespace:**
    An unprivileged user does **not** have `CAP_NET_ADMIN` in the initial user namespace. Therefore, they **cannot** access `NL80211_CMD_TDLS_MGMT` in the root network namespace.

2.  **In a user-created namespace:**
    If an unprivileged user creates a new user namespace and a new network namespace (e.g., using `unshare -un`), they **do** have `CAP_NET_ADMIN` within that new user namespace. In this context, they **can** access `NL80211_CMD_TDLS_MGMT`.

### Practical implications
While an unprivileged user can technically access the command by creating their own namespaces, they can only use it to manage wireless devices that are present in their network namespace.
*   **Physical devices:** Moving a physical wireless device (`wiphy`) from the initial network namespace to a user-created network namespace requires `CAP_NET_ADMIN` in the **initial** user namespace. Thus, an unprivileged user cannot typically "steal" a physical Wi-Fi card to manage it in their own namespace.
*   **Virtual devices:** An unprivileged user can create virtual wireless devices (e.g., using `mac80211_hwsim`, which also uses `GENL_UNS_ADMIN_PERM` for radio creation) within their own namespace and then use `NL80211_CMD_TDLS_MGMT` on them.

### Summary
*   **Does it require `CAP_NET_ADMIN` in the user namespace?** Yes, specifically the user namespace that owns the network namespace associated with the netlink socket.
*   **Is it accessible to unprivileged users?** Only if they are operating within a user namespace they have created (or otherwise have `CAP_NET_ADMIN` in), and only for devices available in that namespace. It is **not** accessible to unprivileged users for managing devices in the system's default (root) network namespace.

gemini-3-flash-preview

							input: 3247
							output: 27
							thoughts: 160
						

**Analyzing the Privileges Required for TDLS Management in nl80211**

Okay, so I see a user is digging into the accessibility of `NL80211_CMD_TDLS_MGMT` to unprivileged users, and it's got me thinking about the specifics of its permission model. Specifically, they're wondering if that `GENL_UNS_ADMIN_PERM` flag translates to a required `CAP_NET_ADMIN` in the user namespace. Makes sense to explore this, especially if we are dealing with a confined environment.

My initial thought is to begin with the core of the matter: pin down the precise location of `NL80211_CMD_TDLS_MGMT` within the `nl80211` generic netlink family. I need to understand its context within the broader structure. I'll need to see how it's defined and, more importantly, how it's *used*. The implementation will tell the tale.

Next, I need to demystify what that `GENL_UNS_ADMIN_PERM` flag *actually* implies. Does it mean the command is automatically granted to unprivileged users? I suspect not, but its implication on the permission system needs clarifying.

So, let's fire up my search tools and start with a hunt for `NL80211_CMD_TDLS_MGMT` within the source code. That'll be the starting point to understand the access control logic.

map[Expression:NL80211_CMD_TDLS_MGMT]

map[Output:include/net/cfg80211.h=4901=struct cfg80211_ops {
--
include/net/cfg80211.h-5304- *	link setup/discovery operations internally. Setup, discovery and
include/net/cfg80211.h:5305: *	teardown packets should be sent through the @NL80211_CMD_TDLS_MGMT
include/net/cfg80211.h-5306- *	command. When this flag is not set, @NL80211_CMD_TDLS_OPER should be
--
include/uapi/linux/nl80211.h-896- *	%NL80211_TDLS_TEARDOWN).
include/uapi/linux/nl80211.h:897: * @NL80211_CMD_TDLS_MGMT: Send a TDLS management frame. The
include/uapi/linux/nl80211.h-898- *	%NL80211_ATTR_TDLS_ACTION attribute determines the type of frame to be
--
include/uapi/linux/nl80211.h=1367=enum nl80211_commands {
--
include/uapi/linux/nl80211.h-1492-	NL80211_CMD_TDLS_OPER,
include/uapi/linux/nl80211.h:1493:	NL80211_CMD_TDLS_MGMT,
include/uapi/linux/nl80211.h-1494-
--
include/uapi/linux/nl80211.h-2153- *	procedures should be performed by sending TDLS packets via
include/uapi/linux/nl80211.h:2154: *	%NL80211_CMD_TDLS_MGMT. Otherwise %NL80211_CMD_TDLS_OPER should be
include/uapi/linux/nl80211.h-2155- *	used for asking the driver to perform a TDLS operation.
--
net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
--
net/wireless/nl80211.c-18796-	{
net/wireless/nl80211.c:18797:		.cmd = NL80211_CMD_TDLS_MGMT,
net/wireless/nl80211.c-18798-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
]

gemini-3-flash-preview

							input: 4460
							output: 51
							thoughts: 105
						

**Analyzing the NL80211 TDLS Management Command**

Alright, let's dive in. My initial observation is that `NL80211_CMD_TDLS_MGMT` is handled within the `nl80211_small_ops` structure, as defined in `net/wireless/nl80211.c`. So, the next logical step is to examine the `nl80211_small_ops` definition itself. I need to understand the associated flags and context for `NL80211_CMD_TDLS_MGMT` to fully grasp its behavior within the broader nl80211 framework. I suspect the key lies in the specifics of how this command is registered and what access it allows. Time to trace the execution path and flag definitions within the operations structure to develop my hypothesis.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_small_ops]

map[SourceCode:18309:	static const struct genl_small_ops nl80211_small_ops[] = {
18310:		{
18311:			.cmd = NL80211_CMD_SET_WIPHY,
18312:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18313:			.doit = nl80211_set_wiphy,
18314:			.flags = GENL_UNS_ADMIN_PERM,
18315:		},
18316:		{
18317:			.cmd = NL80211_CMD_GET_INTERFACE,
18318:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18319:			.doit = nl80211_get_interface,
18320:			.dumpit = nl80211_dump_interface,
18321:			/* can be retrieved by unprivileged users */
18322:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV),
18323:		},
18324:		{
18325:			.cmd = NL80211_CMD_SET_INTERFACE,
18326:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18327:			.doit = nl80211_set_interface,
18328:			.flags = GENL_UNS_ADMIN_PERM,
18329:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
18330:						 NL80211_FLAG_NEED_RTNL),
18331:		},
18332:		{
18333:			.cmd = NL80211_CMD_NEW_INTERFACE,
18334:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18335:			.doit = nl80211_new_interface,
18336:			.flags = GENL_UNS_ADMIN_PERM,
18337:			.internal_flags =
18338:				IFLAGS(NL80211_FLAG_NEED_WIPHY |
18339:				       NL80211_FLAG_NEED_RTNL |
18340:				       /* we take the wiphy mutex later ourselves */
18341:				       NL80211_FLAG_NO_WIPHY_MTX),
18342:		},
18343:		{
18344:			.cmd = NL80211_CMD_DEL_INTERFACE,
18345:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18346:			.doit = nl80211_del_interface,
18347:			.flags = GENL_UNS_ADMIN_PERM,
18348:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
18349:						 NL80211_FLAG_NEED_RTNL),
18350:		},
18351:		{
18352:			.cmd = NL80211_CMD_GET_KEY,
18353:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18354:			.doit = nl80211_get_key,
18355:			.flags = GENL_UNS_ADMIN_PERM,
18356:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18357:		},
18358:		{
18359:			.cmd = NL80211_CMD_SET_KEY,
18360:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18361:			.doit = nl80211_set_key,
18362:			.flags = GENL_UNS_ADMIN_PERM,
18363:			/* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on key */
18364:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18365:						 NL80211_FLAG_CLEAR_SKB),
18366:		},
18367:		{
18368:			.cmd = NL80211_CMD_NEW_KEY,
18369:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18370:			.doit = nl80211_new_key,
18371:			.flags = GENL_UNS_ADMIN_PERM,
18372:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18373:						 NL80211_FLAG_CLEAR_SKB),
18374:		},
18375:		{
18376:			.cmd = NL80211_CMD_DEL_KEY,
18377:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18378:			.doit = nl80211_del_key,
18379:			.flags = GENL_UNS_ADMIN_PERM,
18380:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18381:		},
18382:		{
18383:			.cmd = NL80211_CMD_SET_BEACON,
18384:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18385:			.flags = GENL_UNS_ADMIN_PERM,
18386:			.doit = nl80211_set_beacon,
18387:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18388:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18389:		},
18390:		{
18391:			.cmd = NL80211_CMD_START_AP,
18392:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18393:			.flags = GENL_UNS_ADMIN_PERM,
18394:			.doit = nl80211_start_ap,
18395:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18396:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18397:		},
18398:		{
18399:			.cmd = NL80211_CMD_STOP_AP,
18400:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18401:			.flags = GENL_UNS_ADMIN_PERM,
18402:			.doit = nl80211_stop_ap,
18403:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18404:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18405:		},
18406:		{
18407:			.cmd = NL80211_CMD_GET_STATION,
18408:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18409:			.doit = nl80211_get_station,
18410:			.dumpit = nl80211_dump_station,
18411:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
18412:		},
18413:		{
18414:			.cmd = NL80211_CMD_SET_STATION,
18415:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18416:			.doit = nl80211_set_station,
18417:			.flags = GENL_UNS_ADMIN_PERM,
18418:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18419:		},
18420:		{
18421:			.cmd = NL80211_CMD_NEW_STATION,
18422:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18423:			.doit = nl80211_new_station,
18424:			.flags = GENL_UNS_ADMIN_PERM,
18425:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18426:		},
18427:		{
18428:			.cmd = NL80211_CMD_DEL_STATION,
18429:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18430:			.doit = nl80211_del_station,
18431:			.flags = GENL_UNS_ADMIN_PERM,
18432:			/* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on
18433:			 * whether MAC address is passed or not. If MAC address is
18434:			 * passed, then even during MLO, link ID is not required.
18435:			 */
18436:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18437:		},
18438:		{
18439:			.cmd = NL80211_CMD_GET_MPATH,
18440:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18441:			.doit = nl80211_get_mpath,
18442:			.dumpit = nl80211_dump_mpath,
18443:			.flags = GENL_UNS_ADMIN_PERM,
18444:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18445:		},
18446:		{
18447:			.cmd = NL80211_CMD_GET_MPP,
18448:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18449:			.doit = nl80211_get_mpp,
18450:			.dumpit = nl80211_dump_mpp,
18451:			.flags = GENL_UNS_ADMIN_PERM,
18452:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18453:		},
18454:		{
18455:			.cmd = NL80211_CMD_SET_MPATH,
18456:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18457:			.doit = nl80211_set_mpath,
18458:			.flags = GENL_UNS_ADMIN_PERM,
18459:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18460:		},
18461:		{
18462:			.cmd = NL80211_CMD_NEW_MPATH,
18463:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18464:			.doit = nl80211_new_mpath,
18465:			.flags = GENL_UNS_ADMIN_PERM,
18466:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18467:		},
18468:		{
18469:			.cmd = NL80211_CMD_DEL_MPATH,
18470:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18471:			.doit = nl80211_del_mpath,
18472:			.flags = GENL_UNS_ADMIN_PERM,
18473:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18474:		},
18475:		{
18476:			.cmd = NL80211_CMD_SET_BSS,
18477:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18478:			.doit = nl80211_set_bss,
18479:			.flags = GENL_UNS_ADMIN_PERM,
18480:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18481:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18482:		},
18483:		{
18484:			.cmd = NL80211_CMD_GET_REG,
18485:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18486:			.doit = nl80211_get_reg_do,
18487:			.dumpit = nl80211_get_reg_dump,
18488:			/* can be retrieved by unprivileged users */
18489:		},
18490:	#ifdef CONFIG_CFG80211_CRDA_SUPPORT
18491:		{
18492:			.cmd = NL80211_CMD_SET_REG,
18493:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18494:			.doit = nl80211_set_reg,
18495:			.flags = GENL_ADMIN_PERM,
18496:		},
18497:	#endif
18498:		{
18499:			.cmd = NL80211_CMD_REQ_SET_REG,
18500:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18501:			.doit = nl80211_req_set_reg,
18502:			.flags = GENL_ADMIN_PERM,
18503:		},
18504:		{
18505:			.cmd = NL80211_CMD_RELOAD_REGDB,
18506:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18507:			.doit = nl80211_reload_regdb,
18508:			.flags = GENL_ADMIN_PERM,
18509:		},
18510:		{
18511:			.cmd = NL80211_CMD_GET_MESH_CONFIG,
18512:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18513:			.doit = nl80211_get_mesh_config,
18514:			/* can be retrieved by unprivileged users */
18515:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18516:		},
18517:		{
18518:			.cmd = NL80211_CMD_SET_MESH_CONFIG,
18519:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18520:			.doit = nl80211_update_mesh_config,
18521:			.flags = GENL_UNS_ADMIN_PERM,
18522:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18523:		},
18524:		{
18525:			.cmd = NL80211_CMD_TRIGGER_SCAN,
18526:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18527:			.doit = nl80211_trigger_scan,
18528:			.flags = GENL_UNS_ADMIN_PERM,
18529:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18530:		},
18531:		{
18532:			.cmd = NL80211_CMD_ABORT_SCAN,
18533:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18534:			.doit = nl80211_abort_scan,
18535:			.flags = GENL_UNS_ADMIN_PERM,
18536:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18537:		},
18538:		{
18539:			.cmd = NL80211_CMD_GET_SCAN,
18540:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18541:			.dumpit = nl80211_dump_scan,
18542:		},
18543:		{
18544:			.cmd = NL80211_CMD_START_SCHED_SCAN,
18545:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18546:			.doit = nl80211_start_sched_scan,
18547:			.flags = GENL_UNS_ADMIN_PERM,
18548:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18549:		},
18550:		{
18551:			.cmd = NL80211_CMD_STOP_SCHED_SCAN,
18552:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18553:			.doit = nl80211_stop_sched_scan,
18554:			.flags = GENL_UNS_ADMIN_PERM,
18555:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18556:		},
18557:		{
18558:			.cmd = NL80211_CMD_AUTHENTICATE,
18559:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18560:			.doit = nl80211_authenticate,
18561:			.flags = GENL_UNS_ADMIN_PERM,
18562:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18563:						 NL80211_FLAG_CLEAR_SKB),
18564:		},
18565:		{
18566:			.cmd = NL80211_CMD_ASSOCIATE,
18567:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18568:			.doit = nl80211_associate,
18569:			.flags = GENL_UNS_ADMIN_PERM,
18570:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18571:						 NL80211_FLAG_CLEAR_SKB),
18572:		},
18573:		{
18574:			.cmd = NL80211_CMD_DEAUTHENTICATE,
18575:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18576:			.doit = nl80211_deauthenticate,
18577:			.flags = GENL_UNS_ADMIN_PERM,
18578:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18579:		},
18580:		{
18581:			.cmd = NL80211_CMD_DISASSOCIATE,
18582:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18583:			.doit = nl80211_disassociate,
18584:			.flags = GENL_UNS_ADMIN_PERM,
18585:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18586:		},
18587:		{
18588:			.cmd = NL80211_CMD_JOIN_IBSS,
18589:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18590:			.doit = nl80211_join_ibss,
18591:			.flags = GENL_UNS_ADMIN_PERM,
18592:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18593:		},
18594:		{
18595:			.cmd = NL80211_CMD_LEAVE_IBSS,
18596:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18597:			.doit = nl80211_leave_ibss,
18598:			.flags = GENL_UNS_ADMIN_PERM,
18599:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18600:		},
18601:	#ifdef CONFIG_NL80211_TESTMODE
18602:		{
18603:			.cmd = NL80211_CMD_TESTMODE,
18604:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18605:			.doit = nl80211_testmode_do,
18606:			.dumpit = nl80211_testmode_dump,
18607:			.flags = GENL_UNS_ADMIN_PERM,
18608:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
18609:		},
18610:	#endif
18611:		{
18612:			.cmd = NL80211_CMD_CONNECT,
18613:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18614:			.doit = nl80211_connect,
18615:			.flags = GENL_UNS_ADMIN_PERM,
18616:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18617:						 NL80211_FLAG_CLEAR_SKB),
18618:		},
18619:		{
18620:			.cmd = NL80211_CMD_UPDATE_CONNECT_PARAMS,
18621:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18622:			.doit = nl80211_update_connect_params,
18623:			.flags = GENL_ADMIN_PERM,
18624:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18625:						 NL80211_FLAG_CLEAR_SKB),
18626:		},
18627:		{
18628:			.cmd = NL80211_CMD_DISCONNECT,
18629:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18630:			.doit = nl80211_disconnect,
18631:			.flags = GENL_UNS_ADMIN_PERM,
18632:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18633:		},
18634:		{
18635:			.cmd = NL80211_CMD_SET_WIPHY_NETNS,
18636:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18637:			.doit = nl80211_wiphy_netns,
18638:			.flags = GENL_UNS_ADMIN_PERM,
18639:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY |
18640:						 NL80211_FLAG_NEED_RTNL |
18641:						 NL80211_FLAG_NO_WIPHY_MTX),
18642:		},
18643:		{
18644:			.cmd = NL80211_CMD_GET_SURVEY,
18645:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18646:			.dumpit = nl80211_dump_survey,
18647:		},
18648:		{
18649:			.cmd = NL80211_CMD_SET_PMKSA,
18650:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18651:			.doit = nl80211_set_pmksa,
18652:			.flags = GENL_UNS_ADMIN_PERM,
18653:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18654:						 NL80211_FLAG_CLEAR_SKB),
18655:		},
18656:		{
18657:			.cmd = NL80211_CMD_DEL_PMKSA,
18658:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18659:			.doit = nl80211_del_pmksa,
18660:			.flags = GENL_UNS_ADMIN_PERM,
18661:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18662:		},
18663:		{
18664:			.cmd = NL80211_CMD_FLUSH_PMKSA,
18665:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18666:			.doit = nl80211_flush_pmksa,
18667:			.flags = GENL_UNS_ADMIN_PERM,
18668:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18669:		},
18670:		{
18671:			.cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
18672:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18673:			.doit = nl80211_remain_on_channel,
18674:			.flags = GENL_UNS_ADMIN_PERM,
18675:			/* FIXME: requiring a link ID here is probably not good */
18676:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP |
18677:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18678:		},
18679:		{
18680:			.cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
18681:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18682:			.doit = nl80211_cancel_remain_on_channel,
18683:			.flags = GENL_UNS_ADMIN_PERM,
18684:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18685:		},
18686:		{
18687:			.cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
18688:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18689:			.doit = nl80211_set_tx_bitrate_mask,
18690:			.flags = GENL_UNS_ADMIN_PERM,
18691:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
18692:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18693:		},
18694:		{
18695:			.cmd = NL80211_CMD_REGISTER_FRAME,
18696:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18697:			.doit = nl80211_register_mgmt,
18698:			.flags = GENL_UNS_ADMIN_PERM,
18699:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV),
18700:		},
18701:		{
18702:			.cmd = NL80211_CMD_FRAME,
18703:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18704:			.doit = nl80211_tx_mgmt,
18705:			.flags = GENL_UNS_ADMIN_PERM,
18706:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18707:		},
18708:		{
18709:			.cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
18710:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18711:			.doit = nl80211_tx_mgmt_cancel_wait,
18712:			.flags = GENL_UNS_ADMIN_PERM,
18713:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18714:		},
18715:		{
18716:			.cmd = NL80211_CMD_SET_POWER_SAVE,
18717:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18718:			.doit = nl80211_set_power_save,
18719:			.flags = GENL_UNS_ADMIN_PERM,
18720:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
18721:		},
18722:		{
18723:			.cmd = NL80211_CMD_GET_POWER_SAVE,
18724:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18725:			.doit = nl80211_get_power_save,
18726:			/* can be retrieved by unprivileged users */
18727:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
18728:		},
18729:		{
18730:			.cmd = NL80211_CMD_SET_CQM,
18731:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18732:			.doit = nl80211_set_cqm,
18733:			.flags = GENL_UNS_ADMIN_PERM,
18734:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
18735:		},
18736:		{
18737:			.cmd = NL80211_CMD_SET_CHANNEL,
18738:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18739:			.doit = nl80211_set_channel,
18740:			.flags = GENL_UNS_ADMIN_PERM,
18741:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
18742:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18743:		},
18744:		{
18745:			.cmd = NL80211_CMD_JOIN_MESH,
18746:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18747:			.doit = nl80211_join_mesh,
18748:			.flags = GENL_UNS_ADMIN_PERM,
18749:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18750:		},
18751:		{
18752:			.cmd = NL80211_CMD_LEAVE_MESH,
18753:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18754:			.doit = nl80211_leave_mesh,
18755:			.flags = GENL_UNS_ADMIN_PERM,
18756:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18757:		},
18758:		{
18759:			.cmd = NL80211_CMD_JOIN_OCB,
18760:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18761:			.doit = nl80211_join_ocb,
18762:			.flags = GENL_UNS_ADMIN_PERM,
18763:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18764:		},
18765:		{
18766:			.cmd = NL80211_CMD_LEAVE_OCB,
18767:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18768:			.doit = nl80211_leave_ocb,
18769:			.flags = GENL_UNS_ADMIN_PERM,
18770:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18771:		},
18772:	#ifdef CONFIG_PM
18773:		{
18774:			.cmd = NL80211_CMD_GET_WOWLAN,
18775:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18776:			.doit = nl80211_get_wowlan,
18777:			/* can be retrieved by unprivileged users */
18778:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
18779:		},
18780:		{
18781:			.cmd = NL80211_CMD_SET_WOWLAN,
18782:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18783:			.doit = nl80211_set_wowlan,
18784:			.flags = GENL_UNS_ADMIN_PERM,
18785:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
18786:		},
18787:	#endif
18788:		{
18789:			.cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
18790:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18791:			.doit = nl80211_set_rekey_data,
18792:			.flags = GENL_UNS_ADMIN_PERM,
18793:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18794:						 NL80211_FLAG_CLEAR_SKB),
18795:		},
18796:		{
18797:			.cmd = NL80211_CMD_TDLS_MGMT,
18798:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18799:			.doit = nl80211_tdls_mgmt,
18800:			.flags = GENL_UNS_ADMIN_PERM,
18801:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18802:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18803:		},
18804:		{
18805:			.cmd = NL80211_CMD_TDLS_OPER,
18806:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18807:			.doit = nl80211_tdls_oper,
18808:			.flags = GENL_UNS_ADMIN_PERM,
18809:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18810:		},
18811:		{
18812:			.cmd = NL80211_CMD_UNEXPECTED_FRAME,
18813:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18814:			.doit = nl80211_register_unexpected_frame,
18815:			.flags = GENL_UNS_ADMIN_PERM,
18816:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
18817:		},
18818:		{
18819:			.cmd = NL80211_CMD_PROBE_CLIENT,
18820:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18821:			.doit = nl80211_probe_client,
18822:			.flags = GENL_UNS_ADMIN_PERM,
18823:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18824:		},
18825:		{
18826:			.cmd = NL80211_CMD_REGISTER_BEACONS,
18827:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18828:			.doit = nl80211_register_beacons,
18829:			.flags = GENL_UNS_ADMIN_PERM,
18830:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
18831:		},
18832:		{
18833:			.cmd = NL80211_CMD_SET_NOACK_MAP,
18834:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18835:			.doit = nl80211_set_noack_map,
18836:			.flags = GENL_UNS_ADMIN_PERM,
18837:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
18838:		},
18839:		{
18840:			.cmd = NL80211_CMD_START_P2P_DEVICE,
18841:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18842:			.doit = nl80211_start_p2p_device,
18843:			.flags = GENL_UNS_ADMIN_PERM,
18844:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
18845:						 NL80211_FLAG_NEED_RTNL),
18846:		},
18847:		{
18848:			.cmd = NL80211_CMD_STOP_P2P_DEVICE,
18849:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18850:			.doit = nl80211_stop_p2p_device,
18851:			.flags = GENL_UNS_ADMIN_PERM,
18852:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP |
18853:						 NL80211_FLAG_NEED_RTNL),
18854:		},
18855:		{
18856:			.cmd = NL80211_CMD_START_NAN,
18857:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18858:			.doit = nl80211_start_nan,
18859:			.flags = GENL_ADMIN_PERM,
18860:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
18861:						 NL80211_FLAG_NEED_RTNL),
18862:		},
18863:		{
18864:			.cmd = NL80211_CMD_STOP_NAN,
18865:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18866:			.doit = nl80211_stop_nan,
18867:			.flags = GENL_ADMIN_PERM,
18868:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP |
18869:						 NL80211_FLAG_NEED_RTNL),
18870:		},
18871:		{
18872:			.cmd = NL80211_CMD_ADD_NAN_FUNCTION,
18873:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18874:			.doit = nl80211_nan_add_func,
18875:			.flags = GENL_ADMIN_PERM,
18876:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18877:		},
18878:		{
18879:			.cmd = NL80211_CMD_DEL_NAN_FUNCTION,
18880:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18881:			.doit = nl80211_nan_del_func,
18882:			.flags = GENL_ADMIN_PERM,
18883:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18884:		},
18885:		{
18886:			.cmd = NL80211_CMD_CHANGE_NAN_CONFIG,
18887:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18888:			.doit = nl80211_nan_change_config,
18889:			.flags = GENL_ADMIN_PERM,
18890:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18891:		},
18892:		{
18893:			.cmd = NL80211_CMD_SET_MCAST_RATE,
18894:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18895:			.doit = nl80211_set_mcast_rate,
18896:			.flags = GENL_UNS_ADMIN_PERM,
18897:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
18898:		},
18899:		{
18900:			.cmd = NL80211_CMD_SET_MAC_ACL,
18901:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18902:			.doit = nl80211_set_mac_acl,
18903:			.flags = GENL_UNS_ADMIN_PERM,
18904:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
18905:						 NL80211_FLAG_MLO_UNSUPPORTED),
18906:		},
18907:		{
18908:			.cmd = NL80211_CMD_RADAR_DETECT,
18909:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18910:			.doit = nl80211_start_radar_detection,
18911:			.flags = GENL_UNS_ADMIN_PERM,
18912:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18913:						 NL80211_FLAG_NO_WIPHY_MTX |
18914:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18915:		},
18916:		{
18917:			.cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
18918:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18919:			.doit = nl80211_get_protocol_features,
18920:		},
18921:		{
18922:			.cmd = NL80211_CMD_UPDATE_FT_IES,
18923:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18924:			.doit = nl80211_update_ft_ies,
18925:			.flags = GENL_UNS_ADMIN_PERM,
18926:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18927:		},
18928:		{
18929:			.cmd = NL80211_CMD_CRIT_PROTOCOL_START,
18930:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18931:			.doit = nl80211_crit_protocol_start,
18932:			.flags = GENL_UNS_ADMIN_PERM,
18933:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18934:		},
18935:		{
18936:			.cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
18937:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18938:			.doit = nl80211_crit_protocol_stop,
18939:			.flags = GENL_UNS_ADMIN_PERM,
18940:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
18941:		},
18942:		{
18943:			.cmd = NL80211_CMD_GET_COALESCE,
18944:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18945:			.doit = nl80211_get_coalesce,
18946:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
18947:		},
18948:		{
18949:			.cmd = NL80211_CMD_SET_COALESCE,
18950:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18951:			.doit = nl80211_set_coalesce,
18952:			.flags = GENL_UNS_ADMIN_PERM,
18953:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
18954:		},
18955:		{
18956:			.cmd = NL80211_CMD_CHANNEL_SWITCH,
18957:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18958:			.doit = nl80211_channel_switch,
18959:			.flags = GENL_UNS_ADMIN_PERM,
18960:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18961:						 NL80211_FLAG_MLO_VALID_LINK_ID),
18962:		},
18963:		{
18964:			.cmd = NL80211_CMD_VENDOR,
18965:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18966:			.doit = nl80211_vendor_cmd,
18967:			.dumpit = nl80211_vendor_cmd_dump,
18968:			.flags = GENL_UNS_ADMIN_PERM,
18969:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY |
18970:						 NL80211_FLAG_CLEAR_SKB),
18971:		},
18972:		{
18973:			.cmd = NL80211_CMD_SET_QOS_MAP,
18974:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18975:			.doit = nl80211_set_qos_map,
18976:			.flags = GENL_UNS_ADMIN_PERM,
18977:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18978:		},
18979:		{
18980:			.cmd = NL80211_CMD_ADD_TX_TS,
18981:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18982:			.doit = nl80211_add_tx_ts,
18983:			.flags = GENL_UNS_ADMIN_PERM,
18984:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
18985:						 NL80211_FLAG_MLO_UNSUPPORTED),
18986:		},
18987:		{
18988:			.cmd = NL80211_CMD_DEL_TX_TS,
18989:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18990:			.doit = nl80211_del_tx_ts,
18991:			.flags = GENL_UNS_ADMIN_PERM,
18992:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
18993:		},
18994:		{
18995:			.cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
18996:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18997:			.doit = nl80211_tdls_channel_switch,
18998:			.flags = GENL_UNS_ADMIN_PERM,
18999:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19000:		},
19001:		{
19002:			.cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
19003:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19004:			.doit = nl80211_tdls_cancel_channel_switch,
19005:			.flags = GENL_UNS_ADMIN_PERM,
19006:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19007:		},
19008:		{
19009:			.cmd = NL80211_CMD_SET_MULTICAST_TO_UNICAST,
19010:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19011:			.doit = nl80211_set_multicast_to_unicast,
19012:			.flags = GENL_UNS_ADMIN_PERM,
19013:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
19014:		},
19015:		{
19016:			.cmd = NL80211_CMD_SET_PMK,
19017:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19018:			.doit = nl80211_set_pmk,
19019:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
19020:						 NL80211_FLAG_CLEAR_SKB),
19021:		},
19022:		{
19023:			.cmd = NL80211_CMD_DEL_PMK,
19024:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19025:			.doit = nl80211_del_pmk,
19026:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19027:		},
19028:		{
19029:			.cmd = NL80211_CMD_EXTERNAL_AUTH,
19030:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19031:			.doit = nl80211_external_auth,
19032:			.flags = GENL_ADMIN_PERM,
19033:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19034:		},
19035:		{
19036:			.cmd = NL80211_CMD_CONTROL_PORT_FRAME,
19037:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19038:			.doit = nl80211_tx_control_port,
19039:			.flags = GENL_UNS_ADMIN_PERM,
19040:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19041:		},
19042:		{
19043:			.cmd = NL80211_CMD_GET_FTM_RESPONDER_STATS,
19044:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19045:			.doit = nl80211_get_ftm_responder_stats,
19046:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
19047:						 NL80211_FLAG_MLO_VALID_LINK_ID),
19048:		},
19049:		{
19050:			.cmd = NL80211_CMD_PEER_MEASUREMENT_START,
19051:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19052:			.doit = nl80211_pmsr_start,
19053:			.flags = GENL_UNS_ADMIN_PERM,
19054:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
19055:		},
19056:		{
19057:			.cmd = NL80211_CMD_NOTIFY_RADAR,
19058:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19059:			.doit = nl80211_notify_radar_detection,
19060:			.flags = GENL_UNS_ADMIN_PERM,
19061:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19062:		},
19063:		{
19064:			.cmd = NL80211_CMD_UPDATE_OWE_INFO,
19065:			.doit = nl80211_update_owe_info,
19066:			.flags = GENL_ADMIN_PERM,
19067:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19068:		},
19069:		{
19070:			.cmd = NL80211_CMD_PROBE_MESH_LINK,
19071:			.doit = nl80211_probe_mesh_link,
19072:			.flags = GENL_UNS_ADMIN_PERM,
19073:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19074:		},
19075:		{
19076:			.cmd = NL80211_CMD_SET_TID_CONFIG,
19077:			.doit = nl80211_set_tid_config,
19078:			.flags = GENL_UNS_ADMIN_PERM,
19079:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
19080:						 NL80211_FLAG_MLO_VALID_LINK_ID),
19081:		},
19082:		{
19083:			.cmd = NL80211_CMD_SET_SAR_SPECS,
19084:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19085:			.doit = nl80211_set_sar_specs,
19086:			.flags = GENL_UNS_ADMIN_PERM,
19087:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY |
19088:						 NL80211_FLAG_NEED_RTNL),
19089:		},
19090:		{
19091:			.cmd = NL80211_CMD_COLOR_CHANGE_REQUEST,
19092:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19093:			.doit = nl80211_color_change,
19094:			.flags = GENL_UNS_ADMIN_PERM,
19095:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
19096:						 NL80211_FLAG_MLO_VALID_LINK_ID),
19097:		},
19098:		{
19099:			.cmd = NL80211_CMD_SET_FILS_AAD,
19100:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
19101:			.doit = nl80211_set_fils_aad,
19102:			.flags = GENL_UNS_ADMIN_PERM,
19103:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19104:		},
19105:		{
19106:			.cmd = NL80211_CMD_ADD_LINK,
19107:			.doit = nl80211_add_link,
19108:			.flags = GENL_UNS_ADMIN_PERM,
19109:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19110:		},
19111:		{
19112:			.cmd = NL80211_CMD_REMOVE_LINK,
19113:			.doit = nl80211_remove_link,
19114:			.flags = GENL_UNS_ADMIN_PERM,
19115:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
19116:						 NL80211_FLAG_MLO_VALID_LINK_ID),
19117:		},
19118:		{
19119:			.cmd = NL80211_CMD_ADD_LINK_STA,
19120:			.doit = nl80211_add_link_station,
19121:			.flags = GENL_UNS_ADMIN_PERM,
19122:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
19123:						 NL80211_FLAG_MLO_VALID_LINK_ID),
19124:		},
19125:		{
19126:			.cmd = NL80211_CMD_MODIFY_LINK_STA,
19127:			.doit = nl80211_modify_link_station,
19128:			.flags = GENL_UNS_ADMIN_PERM,
19129:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
19130:						 NL80211_FLAG_MLO_VALID_LINK_ID),
19131:		},
19132:		{
19133:			.cmd = NL80211_CMD_REMOVE_LINK_STA,
19134:			.doit = nl80211_remove_link_station,
19135:			.flags = GENL_UNS_ADMIN_PERM,
19136:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
19137:						 NL80211_FLAG_MLO_VALID_LINK_ID),
19138:		},
19139:		{
19140:			.cmd = NL80211_CMD_SET_HW_TIMESTAMP,
19141:			.doit = nl80211_set_hw_timestamp,
19142:			.flags = GENL_UNS_ADMIN_PERM,
19143:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19144:		},
19145:		{
19146:			.cmd = NL80211_CMD_SET_TID_TO_LINK_MAPPING,
19147:			.doit = nl80211_set_ttlm,
19148:			.flags = GENL_UNS_ADMIN_PERM,
19149:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19150:		},
19151:		{
19152:			.cmd = NL80211_CMD_ASSOC_MLO_RECONF,
19153:			.doit = nl80211_assoc_ml_reconf,
19154:			.flags = GENL_UNS_ADMIN_PERM,
19155:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19156:		},
19157:		{
19158:			.cmd = NL80211_CMD_EPCS_CFG,
19159:			.doit = nl80211_epcs_cfg,
19160:			.flags = GENL_UNS_ADMIN_PERM,
19161:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
19162:		},
19163:	};
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 23465
							output: 24
							thoughts: 264
						

**Analyzing the NL80211_CMD_TDLS_MGMT Command**

Okay, here's what I'm seeing. At line 18797, I've got the `NL80211_CMD_TDLS_MGMT` command defined. I can see the structure of it right here. Of particular interest is the `.flags = GENL_UNS_ADMIN_PERM`. This command's flags indicate some special permission requirements, specifically `GENL_UNS_ADMIN_PERM`.

My next step is clear. I need to dig into the definition of `GENL_UNS_ADMIN_PERM` now. I need to understand how the generic netlink core handles this particular flag. I want to see precisely what permissions or checks are being implemented because of this specific setting. Understanding that will give me a better understanding of the security implications.

map[Expression:GENL_UNS_ADMIN_PERM]

map[Output:
Full output is too long, showing 500 out of 759 lines.
Use more precise expression if possible.

[drivers/net/ieee802154/mac802154_hwsim.c=751=static const struct genl_small_ops hwsim_nl_ops[] = {
 --
 drivers/net/ieee802154/mac802154_hwsim.c-755-		.doit = hwsim_new_radio_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:756:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-757-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-761-		.doit = hwsim_del_radio_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:762:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-763-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-773-		.doit = hwsim_new_edge_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:774:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-775-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-779-		.doit = hwsim_del_edge_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:780:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-781-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-785-		.doit = hwsim_set_edge_lqi,
 drivers/net/ieee802154/mac802154_hwsim.c:786:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-787-	},
 --
 drivers/net/wireguard/generated/netlink.c=56=const struct genl_split_ops wireguard_nl_ops[2] = {
 --
 drivers/net/wireguard/generated/netlink.c-63-		.maxattr	= WGDEVICE_A_IFNAME,
 drivers/net/wireguard/generated/netlink.c:64:		.flags		= GENL_UNS_ADMIN_PERM | GENL_CMD_CAP_DUMP,
 drivers/net/wireguard/generated/netlink.c-65-	},
 --
 drivers/net/wireguard/generated/netlink.c-70-		.maxattr	= WGDEVICE_A_PEERS,
 drivers/net/wireguard/generated/netlink.c:71:		.flags		= GENL_UNS_ADMIN_PERM | GENL_CMD_CAP_DO,
 drivers/net/wireguard/generated/netlink.c-72-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c=6651=static const struct genl_small_ops hwsim_ops[] = {
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6655-		.doit = hwsim_register_received_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6656:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6657-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6671-		.doit = hwsim_new_radio_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6672:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6673-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6677-		.doit = hwsim_del_radio_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6678:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6679-	},
 --
 include/net/genetlink.h=173=enum genl_validate_flags {
 --
 include/net/genetlink.h-182- * @internal_flags: flags used by the family
 include/net/genetlink.h:183: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-184- * @validate: validation flags from enum genl_validate_flags
 --
 include/net/genetlink.h=191=struct genl_small_ops {
 --
 include/net/genetlink.h-203- * @internal_flags: flags used by the family
 include/net/genetlink.h:204: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-205- * @maxattr: maximum number of attributes supported
 --
 include/net/genetlink.h=213=struct genl_ops {
 --
 include/net/genetlink.h-231- * @internal_flags: flags used by the family
 include/net/genetlink.h:232: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-233- * @validate: validation flags from enum genl_validate_flags
 --
 include/uapi/linux/genetlink.h=13=struct genlmsghdr {
 --
 include/uapi/linux/genetlink.h-24-#define GENL_CMD_CAP_HASPOL	0x08
 include/uapi/linux/genetlink.h:25:#define GENL_UNS_ADMIN_PERM	0x10
 include/uapi/linux/genetlink.h-26-
 --
 net/batman-adv/netlink.c=1400=static const struct genl_small_ops batadv_netlink_ops[] = {
 --
 net/batman-adv/netlink.c-1410-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1411:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1412-		.doit = batadv_netlink_tp_meter_start,
 --
 net/batman-adv/netlink.c-1417-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1418:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1419-		.doit = batadv_netlink_tp_meter_cancel,
 --
 net/batman-adv/netlink.c-1424-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1425:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1426-		.dumpit = batadv_algo_dump,
 --
 net/batman-adv/netlink.c-1439-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1440:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1441-		.dumpit = batadv_tt_local_dump,
 --
 net/batman-adv/netlink.c-1445-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1446:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1447-		.dumpit = batadv_tt_global_dump,
 --
 net/batman-adv/netlink.c-1451-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1452:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1453-		.dumpit = batadv_orig_dump,
 --
 net/batman-adv/netlink.c-1457-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1458:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1459-		.dumpit = batadv_hardif_neigh_dump,
 --
 net/batman-adv/netlink.c-1463-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1464:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1465-		.dumpit = batadv_gw_dump,
 --
 net/batman-adv/netlink.c-1469-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1470:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1471-		.dumpit = batadv_bla_claim_dump,
 --
 net/batman-adv/netlink.c-1475-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1476:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1477-		.dumpit = batadv_bla_backbone_dump,
 --
 net/batman-adv/netlink.c-1481-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1482:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1483-		.dumpit = batadv_dat_cache_dump,
 --
 net/batman-adv/netlink.c-1487-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1488:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1489-		.dumpit = batadv_mcast_flags_dump,
 --
 net/batman-adv/netlink.c-1493-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1494:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1495-		.doit = batadv_netlink_set_mesh,
 --
 net/batman-adv/netlink.c-1500-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1501:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1502-		.doit = batadv_netlink_set_hardif,
 --
 net/batman-adv/netlink.c-1516-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1517:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1518-		.doit = batadv_netlink_set_vlan,
 --
 net/ethtool/netlink.c=1133=static const struct genl_ops ethtool_genl_ops[] = {
 --
 net/ethtool/netlink.c-1153-		.cmd	= ETHTOOL_MSG_LINKINFO_SET,
 net/ethtool/netlink.c:1154:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1155-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1169-		.cmd	= ETHTOOL_MSG_LINKMODES_SET,
 net/ethtool/netlink.c:1170:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1171-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1194-		.cmd	= ETHTOOL_MSG_DEBUG_SET,
 net/ethtool/netlink.c:1195:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1196-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1201-		.cmd	= ETHTOOL_MSG_WOL_GET,
 net/ethtool/netlink.c:1202:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1203-		.doit	= ethnl_default_doit,
 --
 net/ethtool/netlink.c-1211-		.cmd	= ETHTOOL_MSG_WOL_SET,
 net/ethtool/netlink.c:1212:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1213-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1227-		.cmd	= ETHTOOL_MSG_FEATURES_SET,
 net/ethtool/netlink.c:1228:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1229-		.doit	= ethnl_set_features,
 --
 net/ethtool/netlink.c-1243-		.cmd	= ETHTOOL_MSG_PRIVFLAGS_SET,
 net/ethtool/netlink.c:1244:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1245-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1259-		.cmd	= ETHTOOL_MSG_RINGS_SET,
 net/ethtool/netlink.c:1260:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1261-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1275-		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
 net/ethtool/netlink.c:1276:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1277-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1291-		.cmd	= ETHTOOL_MSG_COALESCE_SET,
 net/ethtool/netlink.c:1292:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1293-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1307-		.cmd	= ETHTOOL_MSG_PAUSE_SET,
 net/ethtool/netlink.c:1308:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1309-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1323-		.cmd	= ETHTOOL_MSG_EEE_SET,
 net/ethtool/netlink.c:1324:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1325-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1339-		.cmd	= ETHTOOL_MSG_CABLE_TEST_ACT,
 net/ethtool/netlink.c:1340:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1341-		.doit	= ethnl_act_cable_test,
 --
 net/ethtool/netlink.c-1346-		.cmd	= ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
 net/ethtool/netlink.c:1347:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1348-		.doit	= ethnl_act_cable_test_tdr,
 --
 net/ethtool/netlink.c-1370-		.cmd	= ETHTOOL_MSG_FEC_SET,
 net/ethtool/netlink.c:1371:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1372-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1377-		.cmd	= ETHTOOL_MSG_MODULE_EEPROM_GET,
 net/ethtool/netlink.c:1378:		.flags  = GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1379-		.doit	= ethnl_default_doit,
 --
 net/ethtool/netlink.c-1414-		.cmd	= ETHTOOL_MSG_MODULE_SET,
 net/ethtool/netlink.c:1415:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1416-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1430-		.cmd	= ETHTOOL_MSG_PSE_SET,
 net/ethtool/netlink.c:1431:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1432-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1454-		.cmd	= ETHTOOL_MSG_PLCA_SET_CFG,
 net/ethtool/netlink.c:1455:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1456-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1479-		.cmd	= ETHTOOL_MSG_MM_SET,
 net/ethtool/netlink.c:1480:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1481-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1486-		.cmd	= ETHTOOL_MSG_MODULE_FW_FLASH_ACT,
 net/ethtool/netlink.c:1487:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1488-		.doit	= ethnl_act_module_fw_flash,
 --
 net/ethtool/netlink.c-1511-		.cmd	= ETHTOOL_MSG_TSCONFIG_SET,
 net/ethtool/netlink.c:1512:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1513-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1518-		.cmd	= ETHTOOL_MSG_RSS_SET,
 net/ethtool/netlink.c:1519:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1520-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1525-		.cmd	= ETHTOOL_MSG_RSS_CREATE_ACT,
 net/ethtool/netlink.c:1526:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1527-		.doit	= ethnl_rss_create_doit,
 --
 net/ethtool/netlink.c-1532-		.cmd	= ETHTOOL_MSG_RSS_DELETE_ACT,
 net/ethtool/netlink.c:1533:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1534-		.doit	= ethnl_rss_delete_doit,
 --
 net/l2tp/l2tp_netlink.c=935=static const struct genl_small_ops l2tp_nl_ops[] = {
 --
 net/l2tp/l2tp_netlink.c-945-		.doit = l2tp_nl_cmd_tunnel_create,
 net/l2tp/l2tp_netlink.c:946:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-947-	},
 --
 net/l2tp/l2tp_netlink.c-951-		.doit = l2tp_nl_cmd_tunnel_delete,
 net/l2tp/l2tp_netlink.c:952:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-953-	},
 --
 net/l2tp/l2tp_netlink.c-957-		.doit = l2tp_nl_cmd_tunnel_modify,
 net/l2tp/l2tp_netlink.c:958:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-959-	},
 --
 net/l2tp/l2tp_netlink.c-964-		.dumpit = l2tp_nl_cmd_tunnel_dump,
 net/l2tp/l2tp_netlink.c:965:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-966-	},
 --
 net/l2tp/l2tp_netlink.c-970-		.doit = l2tp_nl_cmd_session_create,
 net/l2tp/l2tp_netlink.c:971:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-972-	},
 --
 net/l2tp/l2tp_netlink.c-976-		.doit = l2tp_nl_cmd_session_delete,
 net/l2tp/l2tp_netlink.c:977:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-978-	},
 --
 net/l2tp/l2tp_netlink.c-982-		.doit = l2tp_nl_cmd_session_modify,
 net/l2tp/l2tp_netlink.c:983:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-984-	},
 --
 net/l2tp/l2tp_netlink.c-989-		.dumpit = l2tp_nl_cmd_session_dump,
 net/l2tp/l2tp_netlink.c:990:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-991-	},
 --
 net/mptcp/mptcp_pm_gen.c=92=const struct genl_ops mptcp_pm_nl_ops[11] = {
 --
 net/mptcp/mptcp_pm_gen.c-98-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:99:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-100-	},
 --
 net/mptcp/mptcp_pm_gen.c-106-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:107:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-108-	},
 --
 net/mptcp/mptcp_pm_gen.c-122-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:123:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-124-	},
 --
 net/mptcp/mptcp_pm_gen.c-130-		.maxattr	= MPTCP_PM_ATTR_SUBFLOWS,
 net/mptcp/mptcp_pm_gen.c:131:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-132-	},
 --
 net/mptcp/mptcp_pm_gen.c-145-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:146:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-147-	},
 --
 net/mptcp/mptcp_pm_gen.c-153-		.maxattr	= MPTCP_PM_ATTR_TOKEN,
 net/mptcp/mptcp_pm_gen.c:154:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-155-	},
 --
 net/mptcp/mptcp_pm_gen.c-161-		.maxattr	= MPTCP_PM_ATTR_LOC_ID,
 net/mptcp/mptcp_pm_gen.c:162:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-163-	},
 --
 net/mptcp/mptcp_pm_gen.c-169-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:170:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-171-	},
 --
 net/mptcp/mptcp_pm_gen.c-177-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:178:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-179-	},
 --
 net/netlink/genetlink.c=1155=static int genl_family_rcv_msg(const struct genl_family *family,
 --
 net/netlink/genetlink.c-1185-
 net/netlink/genetlink.c:1186:	if ((op.flags & GENL_UNS_ADMIN_PERM) &&
 net/netlink/genetlink.c-1187-	    !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
 --
 net/openvswitch/conntrack.c=1956=static const struct genl_small_ops ct_limit_genl_ops[] = {
 --
 net/openvswitch/conntrack.c-1958-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/conntrack.c:1959:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/conntrack.c-1960-					       * privilege.
 --
 net/openvswitch/conntrack.c-1965-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/conntrack.c:1966:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/conntrack.c-1967-					       * privilege.
 --
 net/openvswitch/datapath.c=730=static const struct genl_small_ops dp_packet_genl_ops[] = {
 --
 net/openvswitch/datapath.c-732-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:733:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-734-	  .doit = ovs_packet_cmd_execute
 --
 net/openvswitch/datapath.c=1539=static const struct genl_small_ops dp_flow_genl_ops[] = {
 --
 net/openvswitch/datapath.c-1541-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1542:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1543-	  .doit = ovs_flow_cmd_new
 --
 net/openvswitch/datapath.c-1546-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1547:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1548-	  .doit = ovs_flow_cmd_del
 --
 net/openvswitch/datapath.c-1557-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1558:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1559-	  .doit = ovs_flow_cmd_set,
 --
 net/openvswitch/datapath.c=2085=static const struct genl_small_ops dp_datapath_genl_ops[] = {
 --
 net/openvswitch/datapath.c-2087-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2088:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2089-	  .doit = ovs_dp_cmd_new
 --
 net/openvswitch/datapath.c-2092-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2093:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2094-	  .doit = ovs_dp_cmd_del
 --
 net/openvswitch/datapath.c-2103-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2104:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2105-	  .doit = ovs_dp_cmd_set,
 --
 net/openvswitch/datapath.c=2582=static const struct genl_small_ops dp_vport_genl_ops[] = {
 --
 net/openvswitch/datapath.c-2584-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2585:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2586-	  .doit = ovs_vport_cmd_new
 --
 net/openvswitch/datapath.c-2589-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2590:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2591-	  .doit = ovs_vport_cmd_del
 --
 net/openvswitch/datapath.c-2600-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2601:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2602-	  .doit = ovs_vport_cmd_set,
 --
 net/openvswitch/meter.c=682=static const struct genl_small_ops dp_meter_genl_ops[] = {
 --
 net/openvswitch/meter.c-689-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/meter.c:690:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/meter.c-691-					       *  privilege.
 --
 net/openvswitch/meter.c-701-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/meter.c:702:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/meter.c-703-					       *  privilege.
 --
 net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
 --
 net/wireless/nl80211.c-18313-		.doit = nl80211_set_wiphy,
 net/wireless/nl80211.c:18314:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18315-	},
 --
 net/wireless/nl80211.c-18327-		.doit = nl80211_set_interface,
 net/wireless/nl80211.c:18328:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18329-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
 --
 net/wireless/nl80211.c-18335-		.doit = nl80211_new_interface,
 net/wireless/nl80211.c:18336:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18337-		.internal_flags =
 --
 net/wireless/nl80211.c-18346-		.doit = nl80211_del_interface,
 net/wireless/nl80211.c:18347:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18348-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
 --
 net/wireless/nl80211.c-18354-		.doit = nl80211_get_key,
 net/wireless/nl80211.c:18355:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18356-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18361-		.doit = nl80211_set_key,
 net/wireless/nl80211.c:18362:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18363-		/* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on key */
 --
 net/wireless/nl80211.c-18370-		.doit = nl80211_new_key,
 net/wireless/nl80211.c:18371:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18372-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18378-		.doit = nl80211_del_key,
 net/wireless/nl80211.c:18379:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18380-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18384-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18385:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18386-		.doit = nl80211_set_beacon,
 --
 net/wireless/nl80211.c-18392-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18393:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18394-		.doit = nl80211_start_ap,
 --
 net/wireless/nl80211.c-18400-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18401:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18402-		.doit = nl80211_stop_ap,
 --
 net/wireless/nl80211.c-18416-		.doit = nl80211_set_station,
 net/wireless/nl80211.c:18417:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18418-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18423-		.doit = nl80211_new_station,
 net/wireless/nl80211.c:18424:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18425-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18430-		.doit = nl80211_del_station,
 net/wireless/nl80211.c:18431:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18432-		/* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on
 --
 net/wireless/nl80211.c-18442-		.dumpit = nl80211_dump_mpath,
 net/wireless/nl80211.c:18443:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18444-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18450-		.dumpit = nl80211_dump_mpp,
 net/wireless/nl80211.c:18451:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18452-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18457-		.doit = nl80211_set_mpath,
 net/wireless/nl80211.c:18458:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18459-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18464-		.doit = nl80211_new_mpath,
 net/wireless/nl80211.c:18465:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18466-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18471-		.doit = nl80211_del_mpath,
 net/wireless/nl80211.c:18472:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18473-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18478-		.doit = nl80211_set_bss,
 net/wireless/nl80211.c:18479:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18480-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18520-		.doit = nl80211_update_mesh_config,
 net/wireless/nl80211.c:18521:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18522-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18527-		.doit = nl80211_trigger_scan,
 net/wireless/nl80211.c:18528:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18529-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
 --
 net/wireless/nl80211.c-18534-		.doit = nl80211_abort_scan,
 net/wireless/nl80211.c:18535:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18536-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
 --
 net/wireless/nl80211.c-18546-		.doit = nl80211_start_sched_scan,
 net/wireless/nl80211.c:18547:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18548-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18553-		.doit = nl80211_stop_sched_scan,
 net/wireless/nl80211.c:18554:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18555-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18560-		.doit = nl80211_authenticate,
 net/wireless/nl80211.c:18561:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18562-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18568-		.doit = nl80211_associate,
 net/wireless/nl80211.c:18569:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18570-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18576-		.doit = nl80211_deauthenticate,
 net/wireless/nl80211.c:18577:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18578-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18583-		.doit = nl80211_disassociate,
 net/wireless/nl80211.c:18584:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18585-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18590-		.doit = nl80211_join_ibss,
 net/wireless/nl80211.c:18591:		.flags = GENL_UNS_ADMIN_PERM,
]
]

gemini-3-flash-preview

							input: 37295
							output: 45
							thoughts: 293
						

**Analyzing GENL_UNS_ADMIN_PERM and Namespace Capabilities**

Okay, let's break this down. Line 1186-1187 in `net/netlink/genetlink.c` catches my attention. The code explicitly checks for `GENL_UNS_ADMIN_PERM` and whether the user possesses `CAP_NET_ADMIN` within the network namespace's user namespace using `netlink_ns_capable`. This confirms my initial understanding: `GENL_UNS_ADMIN_PERM` is indeed gated by `CAP_NET_ADMIN` within the correct user namespace.

Now, the `net->user_ns` part is key. That represents the user namespace that *owns* the specific network namespace. This means that if I'm operating within a user namespace and have spun up a new network namespace, I *will* possess `CAP_NET_ADMIN` within that very same user namespace. Consequently, operations flagged with `GENL_UNS_ADMIN_PERM` become permissible.

The crux of the issue, as always, is unprivileged access. In the original user namespace, the one that boots the system, an unprivileged user inherently lacks `CAP_NET_ADMIN`. But, and this is where it gets interesting, if that unprivileged user creates a *new* user namespace and, subsequently, a *new* network namespace, they'll *gain* `CAP_NET_ADMIN` within that *new* user namespace. That's the wrinkle.

I need to confirm precisely how `netlink_ns_capable` determines the check. Time to dive into `net/netlink/af_netlink.c` (or wherever it's defined) and see how that function actually works.

map[ContextFile:net/netlink/genetlink.c IncludeLines:true Name:netlink_ns_capable]

map[SourceCode: 856:	/**
 857:	 * netlink_ns_capable - General netlink message capability test
 858:	 * @skb: socket buffer holding a netlink command from userspace
 859:	 * @user_ns: The user namespace of the capability to use
 860:	 * @cap: The capability to use
 861:	 *
 862:	 * Test to see if the opener of the socket we received the message
 863:	 * from had when the netlink socket was created and the sender of the
 864:	 * message has the capability @cap in the user namespace @user_ns.
 865:	 */
 866:	bool netlink_ns_capable(const struct sk_buff *skb,
 867:				struct user_namespace *user_ns, int cap)
 868:	{
 869:		return __netlink_ns_capable(&NETLINK_CB(skb), user_ns, cap);
 870:	}
 SourceFile:net/netlink/af_netlink.c]

gemini-3-flash-preview

							input: 38303
							output: 47
							thoughts: 10
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Decoding Kernel Capability Checks in Netlink Namespaces**

Alright, let's break this down. The mention of `__netlink_ns_capable` immediately flags a critical area: namespace security within the Netlink framework. I'm thinking about the implications of this function call in the context of network operations and how it likely relates to access control. Specifically, it's screaming "capability check" to me. It is highly likely the check here is used to check that a user has the appropriate network capabilities, which is a key security measure.

I'm probably dealing with code that's responsible for managing or interacting with a Netlink socket. This function is almost certainly a gatekeeper. It's the first line of defense, determining whether a calling process, presumably in user space, has the necessary privileges to perform a certain action on a Netlink socket that is namespace bound. Things like creating new namespaces, managing interfaces within a namespace, manipulating routing tables, and so on, all hinge on these capability checks. Any misconfiguration or bypass of this check could be disastrous.

I'm assuming the function probably checks against a capability set, most likely `CAP_NET_ADMIN` or related capabilities, to determine if the caller has sufficient permissions. Depending on the specific context of the Netlink message being processed, the check might be more granular, maybe even examining the specific Netlink family or attribute being manipulated. I would want to look in the surrounding code to determine how fine-grained the checks are.

My immediate question is: what's the broader picture? What is the function trying to protect? I'd need to consider the system's overall security model to be sure. I'm also curious about how this capability check interacts with other security mechanisms, such as AppArmor or SELinux, if they are active on the system.

Essentially, I see this as a critical point of analysis: a potential weak spot or a well-defended fortress, depending on the implementation. Let's dig deeper and see what it's guarding.

map[ContextFile:net/netlink/af_netlink.c IncludeLines:true Name:__netlink_ns_capable]

map[SourceCode: 837:	/**
 838:	 * __netlink_ns_capable - General netlink message capability test
 839:	 * @nsp: NETLINK_CB of the socket buffer holding a netlink command from userspace.
 840:	 * @user_ns: The user namespace of the capability to use
 841:	 * @cap: The capability to use
 842:	 *
 843:	 * Test to see if the opener of the socket we received the message
 844:	 * from had when the netlink socket was created and the sender of the
 845:	 * message has the capability @cap in the user namespace @user_ns.
 846:	 */
 847:	bool __netlink_ns_capable(const struct netlink_skb_parms *nsp,
 848:				struct user_namespace *user_ns, int cap)
 849:	{
 850:		return ((nsp->flags & NETLINK_SKB_DST) ||
 851:			file_ns_capable(nsp->sk->sk_socket->file, user_ns, cap)) &&
 852:			ns_capable(user_ns, cap);
 853:	}
 SourceFile:net/netlink/af_netlink.c]

gemini-3-flash-preview

							input: 39154
							output: 49
							thoughts: 139
						

Okay, let's break this down.

**Analyzing the NL80211 TDLS Management Command**

Alright, first thing's first: the system is verifying the process's capabilities within the user namespace. Makes sense; always good to have that initial access control check. Now, back to focusing on `NL80211_CMD_TDLS_MGMT`. It's clearly flagged as requiring administrative permissions, signified by `GENL_UNS_ADMIN_PERM`. Beyond that, there's a set of `internal_flags` set; specifically `IFLAGS(NL80211_FLAG_NEED_NETDEV_UP | NL80211_FLAG_MLO_VALID_LINK_ID)`. I'm going to have to dive into how the `nl80211` core handles these flags. Thinking the `nl80211` family has a `pre_doit` handler, so that is the likely point of processing, and that's where I need to focus my attention. It will be the next place to look for details.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_fam]

map[SourceCode:19165:	static struct genl_family nl80211_fam __ro_after_init = {
19166:		.name = NL80211_GENL_NAME,	/* have users key off the name instead */
19167:		.hdrsize = 0,			/* no private header */
19168:		.version = 1,			/* no particular meaning now */
19169:		.maxattr = NL80211_ATTR_MAX,
19170:		.policy = nl80211_policy,
19171:		.netnsok = true,
19172:		.pre_doit = nl80211_pre_doit,
19173:		.post_doit = nl80211_post_doit,
19174:		.module = THIS_MODULE,
19175:		.ops = nl80211_ops,
19176:		.n_ops = ARRAY_SIZE(nl80211_ops),
19177:		.small_ops = nl80211_small_ops,
19178:		.n_small_ops = ARRAY_SIZE(nl80211_small_ops),
19179:		.resv_start_op = NL80211_CMD_REMOVE_LINK_STA + 1,
19180:		.mcgrps = nl80211_mcgrps,
19181:		.n_mcgrps = ARRAY_SIZE(nl80211_mcgrps),
19182:		.parallel_ops = true,
19183:	};
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 40058
							output: 52
							thoughts: 18
						

Okay, here's my attempt at summarizing the thought process, as if I were considering the `nl80211_pre_doit` function:

**Diving into `nl80211_pre_doit`**

Alright, let's take a look at `nl80211_pre_doit`. I'm going to start by examining it with a critical eye, as it's the pre-`doit` function, so it should be handling initial setup or validation before the core work is done. It's crucial, obviously, because anything that fails in here could mean a malformed command is immediately rejected before any attempt is made to execute it.

I'll be paying close attention to what checks are being performed. Are we validating the netlink message itself? Are there any sanity checks on the attributes? Is it handling permissions appropriately? I'll need to understand if this is simply about security, or if there is any preparation being done prior to parsing the main `doit` command? Things like setting up data structures, looking up relevant interfaces, that sort of thing. It's often where you see a lot of the boilerplate that helps streamline later stages.

The goal is to determine its exact role and what it’s responsible for, both from a functionality and security standpoint. Understanding the context around these checks, who is calling it, and under what conditions, are important. I'm looking for potential vulnerabilities, of course, but also for opportunities to optimize or refactor. A well-designed pre-`doit` function can make the main processing much cleaner and more robust. Let's see what's really happening.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_pre_doit]

map[SourceCode:18046:	static int nl80211_pre_doit(const struct genl_split_ops *ops,
18047:				    struct sk_buff *skb,
18048:				    struct genl_info *info)
18049:	{
18050:		struct cfg80211_registered_device *rdev = NULL;
18051:		struct wireless_dev *wdev = NULL;
18052:		struct net_device *dev = NULL;
18053:		u32 internal_flags;
18054:		int err;
18055:	
18056:		if (WARN_ON(ops->internal_flags >= ARRAY_SIZE(nl80211_internal_flags)))
18057:			return -EINVAL;
18058:	
18059:		internal_flags = nl80211_internal_flags[ops->internal_flags];
18060:	
18061:		rtnl_lock();
18062:		if (internal_flags & NL80211_FLAG_NEED_WIPHY) {
18063:			rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
18064:			if (IS_ERR(rdev)) {
18065:				err = PTR_ERR(rdev);
18066:				goto out_unlock;
18067:			}
18068:			info->user_ptr[0] = rdev;
18069:		} else if (internal_flags & NL80211_FLAG_NEED_NETDEV ||
18070:			   internal_flags & NL80211_FLAG_NEED_WDEV) {
18071:			wdev = __cfg80211_wdev_from_attrs(NULL, genl_info_net(info),
18072:							  info->attrs);
18073:			if (IS_ERR(wdev)) {
18074:				err = PTR_ERR(wdev);
18075:				goto out_unlock;
18076:			}
18077:	
18078:			dev = wdev->netdev;
18079:			dev_hold(dev);
18080:			rdev = wiphy_to_rdev(wdev->wiphy);
18081:	
18082:			if (internal_flags & NL80211_FLAG_NEED_NETDEV) {
18083:				if (!dev) {
18084:					err = -EINVAL;
18085:					goto out_unlock;
18086:				}
18087:	
18088:				info->user_ptr[1] = dev;
18089:			} else {
18090:				info->user_ptr[1] = wdev;
18091:			}
18092:	
18093:			if (internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
18094:			    !wdev_running(wdev)) {
18095:				err = -ENETDOWN;
18096:				goto out_unlock;
18097:			}
18098:	
18099:			info->user_ptr[0] = rdev;
18100:		}
18101:	
18102:		if (internal_flags & NL80211_FLAG_MLO_VALID_LINK_ID) {
18103:			struct nlattr *link_id = info->attrs[NL80211_ATTR_MLO_LINK_ID];
18104:	
18105:			if (!wdev) {
18106:				err = -EINVAL;
18107:				goto out_unlock;
18108:			}
18109:	
18110:			/* MLO -> require valid link ID */
18111:			if (wdev->valid_links &&
18112:			    (!link_id ||
18113:			     !(wdev->valid_links & BIT(nla_get_u8(link_id))))) {
18114:				err = -EINVAL;
18115:				goto out_unlock;
18116:			}
18117:	
18118:			/* non-MLO -> no link ID attribute accepted */
18119:			if (!wdev->valid_links && link_id) {
18120:				err = -EINVAL;
18121:				goto out_unlock;
18122:			}
18123:		}
18124:	
18125:		if (internal_flags & NL80211_FLAG_MLO_UNSUPPORTED) {
18126:			if (info->attrs[NL80211_ATTR_MLO_LINK_ID] ||
18127:			    (wdev && wdev->valid_links)) {
18128:				err = -EINVAL;
18129:				goto out_unlock;
18130:			}
18131:		}
18132:	
18133:		if (rdev && !(internal_flags & NL80211_FLAG_NO_WIPHY_MTX)) {
18134:			wiphy_lock(&rdev->wiphy);
18135:			/* we keep the mutex locked until post_doit */
18136:			__release(&rdev->wiphy.mtx);
18137:		}
18138:		if (!(internal_flags & NL80211_FLAG_NEED_RTNL))
18139:			rtnl_unlock();
18140:	
18141:		return 0;
18142:	out_unlock:
18143:		rtnl_unlock();
18144:		dev_put(dev);
18145:		return err;
18146:	}
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 42173
							output: 52
							thoughts: 362
						

**My Analysis of nl80211 Permissions**

Okay, so looking at the `nl80211_pre_doit` function, it doesn't seem to be doing any extra capability checks of its own. It's really just setting up the relevant device pointers (`rdev`, `wdev`, `dev`) based on flags. That's fine, but it means the security checks must be happening elsewhere.

Aha! The `GENL_UNS_ADMIN_PERM` check is actually done within `genl_family_rcv_msg` in `net/netlink/genetlink.c`. Let me refresh my memory...

```c
1186:  if ((op.flags & GENL_UNS_ADMIN_PERM) &&
1187:      !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
```

Right, that makes sense. If the `GENL_UNS_ADMIN_PERM` flag is set, it checks if the user has `CAP_NET_ADMIN` in the user namespace that owns the network namespace. A user *without* privileges in the root user namespace won't have `CAP_NET_ADMIN` there. But if they're in a *non-root* network namespace, `net->user_ns` points to the user namespace associated with *that* network namespace. And if *they* created that network namespace, they *will* have `CAP_NET_ADMIN` within *that* user namespace, which is precisely the behavior one would expect for an unprivileged user utilizing user namespaces. So, `GENL_UNS_ADMIN_PERM` requires `CAP_NET_ADMIN` in the user namespace owning the network namespace, which is generally what unprivileged users can have with the aid of user namespaces.

However, I recall that many wireless operations are often restricted to the init netns or require *real* root privileges. Hold on... I see that `nl80211_fam.netnsok = true`. That's important! It means `nl80211` *is* network-namespace aware.

Now, let me dig deeper. I'll check `nl80211_tdls_mgmt` and see if any additional access control checks are performed there.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_tdls_mgmt]

map[SourceCode:13691:	static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
13692:	{
13693:		struct cfg80211_registered_device *rdev = info->user_ptr[0];
13694:		struct net_device *dev = info->user_ptr[1];
13695:		u8 action_code, dialog_token;
13696:		u32 peer_capability = 0;
13697:		u16 status_code;
13698:		u8 *peer;
13699:		int link_id;
13700:		bool initiator;
13701:	
13702:		if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
13703:		    !rdev->ops->tdls_mgmt)
13704:			return -EOPNOTSUPP;
13705:	
13706:		if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
13707:		    !info->attrs[NL80211_ATTR_STATUS_CODE] ||
13708:		    !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
13709:		    !info->attrs[NL80211_ATTR_IE] ||
13710:		    !info->attrs[NL80211_ATTR_MAC])
13711:			return -EINVAL;
13712:	
13713:		peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
13714:		action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
13715:		status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
13716:		dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
13717:		initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
13718:		if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
13719:			peer_capability =
13720:				nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
13721:		link_id = nl80211_link_id_or_invalid(info->attrs);
13722:	
13723:		return rdev_tdls_mgmt(rdev, dev, peer, link_id, action_code,
13724:				      dialog_token, status_code, peer_capability,
13725:				      initiator,
13726:				      nla_data(info->attrs[NL80211_ATTR_IE]),
13727:				      nla_len(info->attrs[NL80211_ATTR_IE]));
13728:	}
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 44003
							output: 53
							thoughts: 540
						

**My Analysis of NL80211_CMD_TDLS_MGMT Accessibility**

Okay, so I'm diving into the question of whether an unprivileged user can access `NL80211_CMD_TDLS_MGMT`. No extra checks, straight to the core. Essentially, can someone without root privileges poke at this?

The core question, then, is: does "unprivileged" mean someone without special privileges within the root user namespace? If that's the case, then:

1.  In the *root* network namespace, they're blocked because they lack `CAP_NET_ADMIN`. No dice there.
2.  However, if they craft a brand-new user namespace and a network namespace, they *will* possess `CAP_NET_ADMIN` within that new namespace. This means they *can* access the command, assuming the wireless device is also within *that* particular network namespace.

But there's a huge potential gotcha: Can an unprivileged user actually *move* a physical wireless device into their own user-created network namespace? Usually, that requires `CAP_NET_ADMIN` in the *initial* user namespace, or at least in the user namespace currently owning the device's netns.

Let's look at `nl80211_wiphy_netns`, which handles `NL80211_CMD_SET_WIPHY_NETNS`. Ah, it has `GENL_UNS_ADMIN_PERM`, and I see it, right here:

```c
18635:		{
18636:			.cmd = NL80211_CMD_SET_WIPHY_NETNS,
18637:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18638:			.doit = nl80211_wiphy_netns,
18639:			.flags = GENL_UNS_ADMIN_PERM,
18640:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY |
18641:						 NL80211_FLAG_NEED_RTNL |
18642:						 NL80211_FLAG_NO_WIPHY_MTX),
18643:		},
```

Wait, if `NL80211_CMD_SET_WIPHY_NETNS` has the `GENL_UNS_ADMIN_PERM` flag, does this imply that an unprivileged user *inside* a user namespace can, in fact, move a wiphy to their netns? Time to double-check `nl80211_wiphy_netns` itself.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_wiphy_netns]

map[SourceCode:13538:	static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
13539:	{
13540:		struct cfg80211_registered_device *rdev = info->user_ptr[0];
13541:		struct net *net;
13542:		int err;
13543:	
13544:		if (info->attrs[NL80211_ATTR_PID]) {
13545:			u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
13546:	
13547:			net = get_net_ns_by_pid(pid);
13548:		} else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
13549:			u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
13550:	
13551:			net = get_net_ns_by_fd(fd);
13552:		} else {
13553:			return -EINVAL;
13554:		}
13555:	
13556:		if (IS_ERR(net))
13557:			return PTR_ERR(net);
13558:	
13559:		err = 0;
13560:	
13561:		/* check if anything to do */
13562:		if (!net_eq(wiphy_net(&rdev->wiphy), net))
13563:			err = cfg80211_switch_netns(rdev, net);
13564:	
13565:		put_net(net);
13566:		return err;
13567:	}
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 45779
							output: 52
							thoughts: 14
						

Okay, here's my interpretation of that thought process, assuming I'm already well-versed in kernel networking and wireless technologies:

**Delving into `cfg80211_switch_netns`**

Right, so I'm thinking about `cfg80211_switch_netns`. That function... it's pivotal, isn't it? It's the lynchpin for how we handle network namespace switching within the cfg80211 wireless subsystem. I'm immediately picturing the complexities that arise when you need to isolate wireless devices across different namespaces. It's not as simple as just routing packets; there's state to be considered, regulatory domain information, virtual interfaces to manage...

My mind jumps to the scenarios where you have a wireless device that needs to be shared, but with different network configurations for different containers or virtual machines. How does this function ensure proper isolation of the wireless device's resources across these namespaces? What are the key data structures involved, the locks being used? Are we efficiently handling the associated context switching and re-initialization of the wireless interface?

I'm starting to think about potential race conditions. Could there be any issues with concurrent access to the wireless device configuration or state during namespace transitions? It's essential to ensure data consistency and prevent any unexpected behavior.

I'm also wondering about the performance impact. Namespace switching inherently introduces overhead, but we need to ensure that `cfg80211_switch_netns` is optimized as much as possible to minimize any performance degradation for wireless network operations. Is the implementation optimal or are there potential areas of improvement? I need to analyze how it deals with resource management and ensure the function's scalability.

Now, I'm going to start digging into the source code to get a deeper understanding of the implementation details.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:cfg80211_switch_netns]

map[SourceCode: 156:	int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 157:				  struct net *net)
 158:	{
 159:		struct wireless_dev *wdev;
 160:		int err = 0;
 161:	
 162:		if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
 163:			return -EOPNOTSUPP;
 164:	
 165:		list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 166:			if (!wdev->netdev)
 167:				continue;
 168:			wdev->netdev->netns_immutable = false;
 169:			err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
 170:			if (err)
 171:				break;
 172:			wdev->netdev->netns_immutable = true;
 173:		}
 174:	
 175:		if (err) {
 176:			/* failed -- clean up to old netns */
 177:			net = wiphy_net(&rdev->wiphy);
 178:	
 179:			list_for_each_entry_continue_reverse(wdev,
 180:							     &rdev->wiphy.wdev_list,
 181:							     list) {
 182:				if (!wdev->netdev)
 183:					continue;
 184:				wdev->netdev->netns_immutable = false;
 185:				err = dev_change_net_namespace(wdev->netdev, net,
 186:								"wlan%d");
 187:				WARN_ON(err);
 188:				wdev->netdev->netns_immutable = true;
 189:			}
 190:	
 191:			return err;
 192:		}
 193:	
 194:		guard(wiphy)(&rdev->wiphy);
 195:	
 196:		list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 197:			if (!wdev->netdev)
 198:				continue;
 199:			nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
 200:		}
 201:	
 202:		nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
 203:	
 204:		wiphy_net_set(&rdev->wiphy, net);
 205:	
 206:		err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
 207:		WARN_ON(err);
 208:	
 209:		nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
 210:	
 211:		list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
 212:			if (!wdev->netdev)
 213:				continue;
 214:			nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
 215:		}
 216:	
 217:		return 0;
 218:	}
 SourceFile:net/wireless/core.c]

gemini-3-flash-preview

							input: 47263
							output: 43
							thoughts: 111
						

**Analyzing Network Namespace Vulnerability**

Okay, so I'm seeing that `dev_change_net_namespace` function call... hmm, that's interesting. And the `nl80211_wiphy_netns` has `GENL_UNS_ADMIN_PERM` associated with it. This is potentially a big deal. If I understand this correctly, being in a user namespace that *currently* owns the network namespace of a Wi-Fi device (wiphy), I *might* be able to move that device to a completely *different* network namespace? That would be bypassing the typical security restrictions.

Usually, when you're dealing with moving a physical network device to a new namespace, you need `CAP_NET_ADMIN` privileges in the *very* first, originating user namespace. This appears to be a deviation from the expected behavior. I need to take a closer look at the implementation of `dev_change_net_namespace` to verify the exact conditions and potential ramifications. Let's dig into that function and see what's actually happening under the hood. This has some serious implications for containerization and isolation if it's true.

map[ContextFile:net/core/dev.c IncludeLines:true Name:dev_change_net_namespace]

map[SourceCode: 103:	/**
 104:	 * dev_change_net_namespace() - move device to different nethost namespace
 105:	 * @dev: device
 106:	 * @net: network namespace
 107:	 * @pat: If not NULL name pattern to try if the current device name
 108:	 *       is already taken in the destination network namespace.
 109:	 *
 110:	 * This function shuts down a device interface and moves it
 111:	 * to a new network namespace. On success 0 is returned, on
 112:	 * a failure a netagive errno code is returned.
 113:	 *
 114:	 * Callers must hold the rtnl semaphore.
 115:	 *
 116:	 * Return: 0 on success, -errno on failure.
 117:	 */
 118:	int dev_change_net_namespace(struct net_device *dev, struct net *net,
 119:				     const char *pat)
 120:	{
 121:		return __dev_change_net_namespace(dev, net, pat, 0, NULL);
 122:	}
 SourceFile:net/core/dev_api.c]

gemini-3-flash-preview

							input: 48008
							output: 46
							thoughts: 11
						

Okay, here's my summary, taking on the persona you requested:

**Navigating the Net Namespace Changes**

Alright, let's break this down. My focus immediately snaps to `__dev_change_net_namespace`. This function... it's pivotal. It's the lynchpin, the point of no return when we're talking about moving a device, or a whole network namespace. I need to understand it at the deepest level because a misstep here can be catastrophic. Think about it: a corrupted namespace state means network connectivity goes poof and potentially renders a system inoperable.

Now, what’s the architecture here? What are the key data structures this function touches? We're talking device structures, network namespace structures, bridges, VLANs, bonds… the whole kit and caboodle. I need to map the dependencies, trace the data flows. I'm imagining the kernel code now: the intricate dance of pointers, reference counts, and locking. Is there the potential for race conditions? Deadlocks? I need to analyze this function line by line to determine. Are there any known issues associated with a specific device type? How are error conditions handled?

I'm thinking about the different scenarios too. What happens when the new namespace doesn't have the appropriate resources? What about existing connections, queues, and sockets when a device is moved from a namespace? This function must manage the clean-up, the relocation, and the setup of network connections as flawlessly as humanly possible, ideally with atomic operations where possible.

The tricky part of this is that the implementation may interact with other subsystems such as routing and firewall. There's a chain of implications here. I should probably be reading the documentation for `net_namespace_acquire` and `net_namespace_release`, and how they interact with this.

The key is in the design, and making sure that the existing state of the namespaces, and network devices, is correctly tracked and preserved to facilitate movement.

map[ContextFile:net/core/dev_api.c IncludeLines:true Name:__dev_change_net_namespace]

map[SourceCode:12512:	int __dev_change_net_namespace(struct net_device *dev, struct net *net,
12513:				       const char *pat, int new_ifindex,
12514:				       struct netlink_ext_ack *extack)
12515:	{
12516:		struct netdev_name_node *name_node;
12517:		struct net *net_old = dev_net(dev);
12518:		char new_name[IFNAMSIZ] = {};
12519:		int err, new_nsid;
12520:	
12521:		ASSERT_RTNL();
12522:	
12523:		/* Don't allow namespace local devices to be moved. */
12524:		err = -EINVAL;
12525:		if (dev->netns_immutable) {
12526:			NL_SET_ERR_MSG(extack, "The interface netns is immutable");
12527:			goto out;
12528:		}
12529:	
12530:		/* Ensure the device has been registered */
12531:		if (dev->reg_state != NETREG_REGISTERED) {
12532:			NL_SET_ERR_MSG(extack, "The interface isn't registered");
12533:			goto out;
12534:		}
12535:	
12536:		/* Get out if there is nothing todo */
12537:		err = 0;
12538:		if (net_eq(net_old, net))
12539:			goto out;
12540:	
12541:		/* Pick the destination device name, and ensure
12542:		 * we can use it in the destination network namespace.
12543:		 */
12544:		err = -EEXIST;
12545:		if (netdev_name_in_use(net, dev->name)) {
12546:			/* We get here if we can't use the current device name */
12547:			if (!pat) {
12548:				NL_SET_ERR_MSG(extack,
12549:					       "An interface with the same name exists in the target netns");
12550:				goto out;
12551:			}
12552:			err = dev_prep_valid_name(net, dev, pat, new_name, EEXIST);
12553:			if (err < 0) {
12554:				NL_SET_ERR_MSG_FMT(extack,
12555:						   "Unable to use '%s' for the new interface name in the target netns",
12556:						   pat);
12557:				goto out;
12558:			}
12559:		}
12560:		/* Check that none of the altnames conflicts. */
12561:		err = -EEXIST;
12562:		netdev_for_each_altname(dev, name_node) {
12563:			if (netdev_name_in_use(net, name_node->name)) {
12564:				NL_SET_ERR_MSG_FMT(extack,
12565:						   "An interface with the altname %s exists in the target netns",
12566:						   name_node->name);
12567:				goto out;
12568:			}
12569:		}
12570:	
12571:		/* Check that new_ifindex isn't used yet. */
12572:		if (new_ifindex) {
12573:			err = dev_index_reserve(net, new_ifindex);
12574:			if (err < 0) {
12575:				NL_SET_ERR_MSG_FMT(extack,
12576:						   "The ifindex %d is not available in the target netns",
12577:						   new_ifindex);
12578:				goto out;
12579:			}
12580:		} else {
12581:			/* If there is an ifindex conflict assign a new one */
12582:			err = dev_index_reserve(net, dev->ifindex);
12583:			if (err == -EBUSY)
12584:				err = dev_index_reserve(net, 0);
12585:			if (err < 0) {
12586:				NL_SET_ERR_MSG(extack,
12587:					       "Unable to allocate a new ifindex in the target netns");
12588:				goto out;
12589:			}
12590:			new_ifindex = err;
12591:		}
12592:	
12593:		/*
12594:		 * And now a mini version of register_netdevice unregister_netdevice.
12595:		 */
12596:	
12597:		netdev_lock_ops(dev);
12598:		/* If device is running close it first. */
12599:		netif_close(dev);
12600:		/* And unlink it from device chain */
12601:		unlist_netdevice(dev);
12602:	
12603:		if (!netdev_need_ops_lock(dev))
12604:			netdev_lock(dev);
12605:		dev->moving_ns = true;
12606:		netdev_unlock(dev);
12607:	
12608:		synchronize_net();
12609:	
12610:		/* Shutdown queueing discipline. */
12611:		netdev_lock_ops(dev);
12612:		dev_shutdown(dev);
12613:		netdev_unlock_ops(dev);
12614:	
12615:		/* Notify protocols, that we are about to destroy
12616:		 * this device. They should clean all the things.
12617:		 *
12618:		 * Note that dev->reg_state stays at NETREG_REGISTERED.
12619:		 * This is wanted because this way 8021q and macvlan know
12620:		 * the device is just moving and can keep their slaves up.
12621:		 */
12622:		call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
12623:		rcu_barrier();
12624:	
12625:		new_nsid = peernet2id_alloc(dev_net(dev), net, GFP_KERNEL);
12626:	
12627:		rtmsg_ifinfo_newnet(RTM_DELLINK, dev, ~0U, GFP_KERNEL, &new_nsid,
12628:				    new_ifindex);
12629:	
12630:		/*
12631:		 *	Flush the unicast and multicast chains
12632:		 */
12633:		dev_uc_flush(dev);
12634:		dev_mc_flush(dev);
12635:	
12636:		/* Send a netdev-removed uevent to the old namespace */
12637:		kobject_uevent(&dev->dev.kobj, KOBJ_REMOVE);
12638:		netdev_adjacent_del_links(dev);
12639:	
12640:		/* Move per-net netdevice notifiers that are following the netdevice */
12641:		move_netdevice_notifiers_dev_net(dev, net);
12642:	
12643:		/* Actually switch the network namespace */
12644:		netdev_lock(dev);
12645:		dev_net_set(dev, net);
12646:		netdev_unlock(dev);
12647:		dev->ifindex = new_ifindex;
12648:	
12649:		if (new_name[0]) {
12650:			/* Rename the netdev to prepared name */
12651:			write_seqlock_bh(&netdev_rename_lock);
12652:			strscpy(dev->name, new_name, IFNAMSIZ);
12653:			write_sequnlock_bh(&netdev_rename_lock);
12654:		}
12655:	
12656:		/* Fixup kobjects */
12657:		dev_set_uevent_suppress(&dev->dev, 1);
12658:		err = device_rename(&dev->dev, dev->name);
12659:		dev_set_uevent_suppress(&dev->dev, 0);
12660:		WARN_ON(err);
12661:	
12662:		/* Send a netdev-add uevent to the new namespace */
12663:		kobject_uevent(&dev->dev.kobj, KOBJ_ADD);
12664:		netdev_adjacent_add_links(dev);
12665:	
12666:		/* Adapt owner in case owning user namespace of target network
12667:		 * namespace is different from the original one.
12668:		 */
12669:		err = netdev_change_owner(dev, net_old, net);
12670:		WARN_ON(err);
12671:	
12672:		netdev_lock(dev);
12673:		dev->moving_ns = false;
12674:		if (!netdev_need_ops_lock(dev))
12675:			netdev_unlock(dev);
12676:	
12677:		/* Add the device back in the hashes */
12678:		list_netdevice(dev);
12679:		/* Notify protocols, that a new device appeared. */
12680:		call_netdevice_notifiers(NETDEV_REGISTER, dev);
12681:		netdev_unlock_ops(dev);
12682:	
12683:		/*
12684:		 *	Prevent userspace races by waiting until the network
12685:		 *	device is fully setup before sending notifications.
12686:		 */
12687:		rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U, GFP_KERNEL, 0, NULL);
12688:	
12689:		synchronize_net();
12690:		err = 0;
12691:	out:
12692:		return err;
12693:	}
 SourceFile:net/core/dev.c]

gemini-3-flash-preview

							input: 51427
							output: 37
							thoughts: 921
						

**Analyzing nl80211 Permissions and Network Namespaces**

Okay, let's break this down. My initial thought was that I didn't see explicit capability checks in `__dev_change_net_namespace`, but that's not the full story. I remember that `dev_change_net_namespace` is typically called from `rtnetlink`, which *does* have its own capability checks. I'm focusing on the `nl80211_wiphy_netns` path now.

Specifically, `GENL_UNS_ADMIN_PERM` in `genetlink` is the key. That check boils down to requiring `CAP_NET_ADMIN` in the *current network namespace's user namespace*. This is critical. So, if I'm in the root netns, I need `CAP_NET_ADMIN` in the root user namespace. If I'm in a non-root netns, I need `CAP_NET_ADMIN` in the user namespace that created or owns that specific netns.

Now, consider an unprivileged user. They can create a new user namespace and a new network namespace, and they would have `CAP_NET_ADMIN` in that new user namespace. But here's the catch: they likely won't have any wireless devices in that *new* network namespace initially. To get one, they'd have to move it from the root network namespace. However, to issue the command to move it *from* the root network namespace, they'd have to use the root network namespace's `nl80211`. But here's the problem: in the root network namespace, they're unprivileged and *don't* have `CAP_NET_ADMIN`. So they can't move the wiphy.

Even if they are in the root netns, they are unprivileged. If they create a new netns, they are still unprivileged in the root netns. They can't move the wiphy because `NL80211_CMD_SET_WIPHY_NETNS` requires `CAP_NET_ADMIN` in the *current* netns's user namespace; if they are in the root netns, they don't have it.

So, `GENL_UNS_ADMIN_PERM` essentially means: "requires `CAP_NET_ADMIN` in the user namespace that owns the network namespace". For the root network namespace, this translates to `CAP_NET_ADMIN` in the root user namespace (i.e., root or a process with that capability). For a non-root network namespace, it's the user who *created* it.

Therefore, for `NL80211_CMD_TDLS_MGMT`, access is determined like this:
1.  Root (or anyone with `CAP_NET_ADMIN`) in the root netns.
2.  The "owner" of a non-root netns (who has `CAP_NET_ADMIN` there), *if* they have a wireless device in that netns.

Answering the initial question, "Is `NL80211_CMD_TDLS_MGMT` accessible to unprivileged users?" The answer is that it requires `CAP_NET_ADMIN` in the user namespace of the network namespace. Thus, it's NOT accessible to unprivileged users in the root network namespace. BUT, it IS accessible to users who have `CAP_NET_ADMIN` in their own user/network namespace (e.g., via `unshare -un`), *but* they would only be able to use it on wireless devices that are present in that network namespace.

And yes, the question "Does it mean it requires CAP_NET_ADMIN in the user namespace?" is correct: specifically, the user namespace that *owns* the network namespace where the command is being issued.

I need to make sure there are no other restrictions. I will check for any additional constraints. I see that `NL80211_CMD_TDLS_MGMT` has the `NL80211_FLAG_NEED_NETDEV_UP` flag, which means the interface needs to be up.

Finally, I will check for any global policies, e.g. based on `init_user_ns` or `capable(CAP_SYS_ADMIN)` inside `net/wireless/nl80211.c`, to ensure that there are no additional limitations. I'll search the code for instances of `init_user_ns`.

map[Expression:init_user_ns PathPrefix:net/wireless/nl80211.c]

map[Output:
Full output is too long, showing 500 out of 2870 lines.
Use more precise expression if possible.

[arch/arm64/net/bpf_jit_comp.c=990=static void __maybe_unused build_bhb_mitigation(struct jit_ctx *ctx)
 --
 arch/arm64/net/bpf_jit_comp.c-999-
 arch/arm64/net/bpf_jit_comp.c:1000:	if (ns_capable_noaudit(&init_user_ns, CAP_SYS_ADMIN))
 arch/arm64/net/bpf_jit_comp.c-1001-		return;
 --
 arch/powerpc/mm/fault.c=200=static bool bad_kernel_fault(struct pt_regs *regs, unsigned long error_code,
 --
 arch/powerpc/mm/fault.c-208-				    address,
 arch/powerpc/mm/fault.c:209:				    from_kuid(&init_user_ns, current_uid()));
 arch/powerpc/mm/fault.c-210-
 --
 arch/powerpc/mm/fault.c-222-				    str_write_read(is_write), address,
 arch/powerpc/mm/fault.c:223:				    from_kuid(&init_user_ns, current_uid()));
 arch/powerpc/mm/fault.c-224-
 --
 arch/powerpc/mm/fault.c=314=static void sanity_check_fault(bool is_write, bool is_user,
 --
 arch/powerpc/mm/fault.c-325-				   current->comm, current->pid, address,
 arch/powerpc/mm/fault.c:326:				   from_kuid(&init_user_ns, current_uid()));
 arch/powerpc/mm/fault.c-327-		return;
 --
 arch/powerpc/platforms/cell/spufs/inode.c=578=static int spufs_show_options(struct seq_file *m, struct dentry *root)
 --
 arch/powerpc/platforms/cell/spufs/inode.c-584-		seq_printf(m, ",uid=%u",
 arch/powerpc/platforms/cell/spufs/inode.c:585:			   from_kuid_munged(&init_user_ns, inode->i_uid));
 arch/powerpc/platforms/cell/spufs/inode.c-586-	if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID))
 arch/powerpc/platforms/cell/spufs/inode.c-587-		seq_printf(m, ",gid=%u",
 arch/powerpc/platforms/cell/spufs/inode.c:588:			   from_kgid_munged(&init_user_ns, inode->i_gid));
 arch/powerpc/platforms/cell/spufs/inode.c-589-	if ((inode->i_mode & S_IALLUGO) != 0775)
 --
 arch/s390/hypfs/inode.c=231=static int hypfs_show_options(struct seq_file *s, struct dentry *root)
 --
 arch/s390/hypfs/inode.c-234-
 arch/s390/hypfs/inode.c:235:	seq_printf(s, ",uid=%u", from_kuid_munged(&init_user_ns, hypfs_info->uid));
 arch/s390/hypfs/inode.c:236:	seq_printf(s, ",gid=%u", from_kgid_munged(&init_user_ns, hypfs_info->gid));
 arch/s390/hypfs/inode.c-237-	return 0;
 --
 arch/x86/kernel/vm86_32.c=199=static long do_sys_vm86(struct vm86plus_struct __user *user_vm86, bool plus)
 --
 arch/x86/kernel/vm86_32.c-229-			     current->comm, task_pid_nr(current),
 arch/x86/kernel/vm86_32.c:230:			     from_kuid_munged(&init_user_ns, current_uid()));
 arch/x86/kernel/vm86_32.c-231-		return -EPERM;
 --
 arch/x86/mm/fault.c=509=show_fault_oops(struct pt_regs *regs, unsigned long error_code, unsigned long address)
 --
 arch/x86/mm/fault.c-526-			pr_crit("kernel tried to execute NX-protected page - exploit attempt? (uid: %d)\n",
 arch/x86/mm/fault.c:527:				from_kuid(&init_user_ns, current_uid()));
 arch/x86/mm/fault.c-528-		if (pte && pte_present(*pte) && pte_exec(*pte) && !nx &&
 --
 arch/x86/mm/fault.c-531-			pr_crit("unable to execute userspace code (SMEP?) (uid: %d)\n",
 arch/x86/mm/fault.c:532:				from_kuid(&init_user_ns, current_uid()));
 arch/x86/mm/fault.c-533-	}
 --
 arch/x86/net/bpf_jit_comp.c=2134=st:			if (is_imm8(insn->off))
 --
 arch/x86/net/bpf_jit_comp.c-2730-			if (bpf_prog_was_classic(bpf_prog) &&
 arch/x86/net/bpf_jit_comp.c:2731:			    !ns_capable_noaudit(&init_user_ns, CAP_SYS_ADMIN)) {
 arch/x86/net/bpf_jit_comp.c-2732-				u8 *ip = image + addrs[i - 1];
 --
 drivers/android/binder.c=5506=static int binder_ioctl_set_ctx_mgr(struct file *filp,
 --
 drivers/android/binder.c-5525-			pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
 drivers/android/binder.c:5526:			       from_kuid(&init_user_ns, curr_euid),
 drivers/android/binder.c:5527:			       from_kuid(&init_user_ns,
 drivers/android/binder.c-5528-					 context->binder_context_mgr_uid));
 --
 drivers/base/core.c=2654=static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
 --
 drivers/base/core.c-2674-			if (!uid_eq(uid, GLOBAL_ROOT_UID))
 drivers/base/core.c:2675:				add_uevent_var(env, "DEVUID=%u", from_kuid(&init_user_ns, uid));
 drivers/base/core.c-2676-			if (!gid_eq(gid, GLOBAL_ROOT_GID))
 drivers/base/core.c:2677:				add_uevent_var(env, "DEVGID=%u", from_kgid(&init_user_ns, gid));
 drivers/base/core.c-2678-			kfree(tmp);
 --
 drivers/block/ublk_drv.c=1219=static void ublk_store_owner_uid_gid(unsigned int *owner_uid,
 --
 drivers/block/ublk_drv.c-1226-
 drivers/block/ublk_drv.c:1227:	*owner_uid = from_kuid(&init_user_ns, uid);
 drivers/block/ublk_drv.c:1228:	*owner_gid = from_kgid(&init_user_ns, gid);
 drivers/block/ublk_drv.c-1229-}
 --
 drivers/connector/cn_proc.c=171=void proc_id_connector(struct task_struct *task, int which_id)
 --
 drivers/connector/cn_proc.c-189-	if (which_id == PROC_EVENT_UID) {
 drivers/connector/cn_proc.c:190:		ev->event_data.id.r.ruid = from_kuid_munged(&init_user_ns, cred->uid);
 drivers/connector/cn_proc.c:191:		ev->event_data.id.e.euid = from_kuid_munged(&init_user_ns, cred->euid);
 drivers/connector/cn_proc.c-192-	} else if (which_id == PROC_EVENT_GID) {
 drivers/connector/cn_proc.c:193:		ev->event_data.id.r.rgid = from_kgid_munged(&init_user_ns, cred->gid);
 drivers/connector/cn_proc.c:194:		ev->event_data.id.e.egid = from_kgid_munged(&init_user_ns, cred->egid);
 drivers/connector/cn_proc.c-195-	} else {
 --
 drivers/connector/cn_proc.c=395=static void cn_proc_mcast_ctl(struct cn_msg *msg,
 --
 drivers/connector/cn_proc.c-408-	 */
 drivers/connector/cn_proc.c:409:	if ((current_user_ns() != &init_user_ns) ||
 drivers/connector/cn_proc.c-410-	    !task_is_in_init_pid_ns(current))
 --
 drivers/firmware/efi/efi.c=68=struct mm_struct efi_mm = {
 --
 drivers/firmware/efi/efi.c-75-	.mmlist			= LIST_HEAD_INIT(efi_mm.mmlist),
 drivers/firmware/efi/efi.c:76:	.user_ns		= &init_user_ns,
 drivers/firmware/efi/efi.c-77-#ifdef CONFIG_SCHED_MM_CID
 --
 drivers/net/tun.c=3040=static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
 --
 drivers/net/tun.c-3170-		netif_info(tun, drv, tun->dev, "owner set to %u\n",
 drivers/net/tun.c:3171:			   from_kuid(&init_user_ns, tun->owner));
 drivers/net/tun.c-3172-		break;
 --
 drivers/net/tun.c-3183-		netif_info(tun, drv, tun->dev, "group set to %u\n",
 drivers/net/tun.c:3184:			   from_kgid(&init_user_ns, tun->group));
 drivers/net/tun.c-3185-		break;
 --
 drivers/pci/pci-sysfs.c=739=static ssize_t pci_read_config(struct file *filp, struct kobject *kobj,
 --
 drivers/pci/pci-sysfs.c-748-	/* Several chips lock up trying to read undefined config space */
 drivers/pci/pci-sysfs.c:749:	if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN))
 drivers/pci/pci-sysfs.c-750-		size = dev->cfg_size;
 --
 drivers/tty/tty_audit.c=63=static void tty_audit_log(const char *description, dev_t dev,
 --
 drivers/tty/tty_audit.c-67-	pid_t pid = task_pid_nr(current);
 drivers/tty/tty_audit.c:68:	uid_t uid = from_kuid(&init_user_ns, task_uid(current));
 drivers/tty/tty_audit.c:69:	uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(current));
 drivers/tty/tty_audit.c-70-	unsigned int sessionid = audit_get_sessionid(current);
 --
 drivers/tty/tty_ioctl.c=765=int tty_mode_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 --
 drivers/tty/tty_ioctl.c-842-	case TIOCSLCKTRMIOS:
 drivers/tty/tty_ioctl.c:843:		if (!checkpoint_restore_ns_capable(&init_user_ns))
 drivers/tty/tty_ioctl.c-844-			return -EPERM;
 --
 drivers/tty/tty_ioctl.c-859-	case TIOCSLCKTRMIOS:
 drivers/tty/tty_ioctl.c:860:		if (!checkpoint_restore_ns_capable(&init_user_ns))
 drivers/tty/tty_ioctl.c-861-			return -EPERM;
 --
 drivers/usb/gadget/legacy/inode.c=1965=gadgetfs_make_inode (struct super_block *sb,
 --
 drivers/usb/gadget/legacy/inode.c-1973-		inode->i_mode = mode;
 drivers/usb/gadget/legacy/inode.c:1974:		inode->i_uid = make_kuid(&init_user_ns, default_uid);
 drivers/usb/gadget/legacy/inode.c:1975:		inode->i_gid = make_kgid(&init_user_ns, default_gid);
 drivers/usb/gadget/legacy/inode.c-1976-		simple_inode_init_ts(inode);
 --
 fs/9p/acl.c=21=static struct posix_acl *v9fs_fid_get_acl(struct p9_fid *fid, const char *name)
 --
 fs/9p/acl.c-42-	else
 fs/9p/acl.c:43:		acl = posix_acl_from_xattr(&init_user_ns, value, size);
 fs/9p/acl.c-44-	kfree(value);
 --
 fs/9p/acl.c=155=int v9fs_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 --
 fs/9p/acl.c-169-
 fs/9p/acl.c:170:		value = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_NOFS);
 fs/9p/acl.c-171-		if (!value) {
 --
 fs/9p/acl.c=243=static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl)
 --
 fs/9p/acl.c-253-	/* Set a setxattr request to server */
 fs/9p/acl.c:254:	buffer = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_KERNEL);
 fs/9p/acl.c-255-	if (!buffer)
 --
 fs/9p/fid.c=113=static struct p9_fid *v9fs_fid_find(struct dentry *dentry, kuid_t uid, int any)
 --
 fs/9p/fid.c-117-	p9_debug(P9_DEBUG_VFS, " dentry: %pd (%p) uid %d any %d\n",
 fs/9p/fid.c:118:		 dentry, dentry, from_kuid(&init_user_ns, uid),
 fs/9p/fid.c-119-		 any);
 --
 fs/9p/v9fs.c=148=int v9fs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/9p/v9fs.c-155-		seq_printf(m, ",dfltuid=%u",
 fs/9p/v9fs.c:156:			   from_kuid_munged(&init_user_ns, v9ses->dfltuid));
 fs/9p/v9fs.c-157-	if (!gid_eq(v9ses->dfltgid, V9FS_DEFGID))
 fs/9p/v9fs.c-158-		seq_printf(m, ",dfltgid=%u",
 fs/9p/v9fs.c:159:			   from_kgid_munged(&init_user_ns, v9ses->dfltgid));
 fs/9p/v9fs.c-160-	if (v9ses->afid != ~0)
 --
 fs/9p/v9fs.c-186-		seq_printf(m, ",access=%u",
 fs/9p/v9fs.c:187:			   from_kuid_munged(&init_user_ns, v9ses->uid));
 fs/9p/v9fs.c-188-		break;
 --
 fs/adfs/super.c=101=static int adfs_show_options(struct seq_file *seq, struct dentry *root)
 --
 fs/adfs/super.c-105-	if (!uid_eq(asb->s_uid, GLOBAL_ROOT_UID))
 fs/adfs/super.c:106:		seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, asb->s_uid));
 fs/adfs/super.c-107-	if (!gid_eq(asb->s_gid, GLOBAL_ROOT_GID))
 fs/adfs/super.c:108:		seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, asb->s_gid));
 fs/adfs/super.c-109-	if (asb->s_owner_mask != ADFS_DEFAULT_OWNER_MASK)
 --
 fs/affs/super.c=268=static int affs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/affs/super.c-290-		seq_printf(m, ",setgid=%u",
 fs/affs/super.c:291:			   from_kgid_munged(&init_user_ns, sbi->s_gid));
 fs/affs/super.c-292-	if (affs_test_opt(sbi->s_flags, SF_SETUID))
 fs/affs/super.c-293-		seq_printf(m, ",setuid=%u",
 fs/affs/super.c:294:			   from_kuid_munged(&init_user_ns, sbi->s_uid));
 fs/affs/super.c-295-	if (affs_test_opt(sbi->s_flags, SF_VERBOSE))
 --
 fs/afs/fsclient.c=175=static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
 --
 fs/afs/fsclient.c-187-		mask |= AFS_SET_OWNER;
 fs/afs/fsclient.c:188:		owner = from_kuid(&init_user_ns, attr->ia_uid);
 fs/afs/fsclient.c-189-	}
 --
 fs/afs/fsclient.c-192-		mask |= AFS_SET_GROUP;
 fs/afs/fsclient.c:193:		group = from_kgid(&init_user_ns, attr->ia_gid);
 fs/afs/fsclient.c-194-	}
 --
 fs/afs/inode.c=153=static int afs_inode_init_from_status(struct afs_operation *op,
 --
 fs/afs/inode.c-181-	inode->i_flags |= S_NOATIME;
 fs/afs/inode.c:182:	inode->i_uid = make_kuid(&init_user_ns, status->owner);
 fs/afs/inode.c:183:	inode->i_gid = make_kgid(&init_user_ns, status->group);
 fs/afs/inode.c-184-	set_nlink(&vnode->netfs.inode, status->nlink);
 --
 fs/afs/inode.c=251=static void afs_apply_status(struct afs_operation *op,
 --
 fs/afs/inode.c-282-	if (status->owner != vnode->status.owner)
 fs/afs/inode.c:283:		inode->i_uid = make_kuid(&init_user_ns, status->owner);
 fs/afs/inode.c-284-
 fs/afs/inode.c-285-	if (status->group != vnode->status.group)
 fs/afs/inode.c:286:		inode->i_gid = make_kgid(&init_user_ns, status->group);
 fs/afs/inode.c-287-
 --
 fs/afs/yfsclient.c=265=static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
 --
 fs/afs/yfsclient.c-278-		mask |= AFS_SET_OWNER;
 fs/afs/yfsclient.c:279:		owner = from_kuid(&init_user_ns, attr->ia_uid);
 fs/afs/yfsclient.c-280-	}
 --
 fs/afs/yfsclient.c-283-		mask |= AFS_SET_GROUP;
 fs/afs/yfsclient.c:284:		group = from_kgid(&init_user_ns, attr->ia_gid);
 fs/afs/yfsclient.c-285-	}
 --
 fs/autofs/inode.c=63=static int autofs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/autofs/inode.c-73-		seq_printf(m, ",uid=%u",
 fs/autofs/inode.c:74:			from_kuid_munged(&init_user_ns, root_inode->i_uid));
 fs/autofs/inode.c-75-	if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID))
 fs/autofs/inode.c-76-		seq_printf(m, ",gid=%u",
 fs/autofs/inode.c:77:			from_kgid_munged(&init_user_ns, root_inode->i_gid));
 fs/autofs/inode.c-78-	seq_printf(m, ",pgrp=%d", pid_vnr(sbi->oz_pgrp));
 --
 fs/befs/linuxvfs.c=299=static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
 --
 fs/befs/linuxvfs.c-348-		befs_sb->mount_opts.uid :
 fs/befs/linuxvfs.c:349:		make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid));
 fs/befs/linuxvfs.c-350-	inode->i_gid = befs_sb->mount_opts.use_gid ?
 fs/befs/linuxvfs.c-351-		befs_sb->mount_opts.gid :
 fs/befs/linuxvfs.c:352:		make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid));
 fs/befs/linuxvfs.c-353-
 --
 fs/befs/linuxvfs.c=725=static int befs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/befs/linuxvfs.c-731-		seq_printf(m, ",uid=%u",
 fs/befs/linuxvfs.c:732:			   from_kuid_munged(&init_user_ns, opts->uid));
 fs/befs/linuxvfs.c-733-	if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
 fs/befs/linuxvfs.c-734-		seq_printf(m, ",gid=%u",
 fs/befs/linuxvfs.c:735:			   from_kgid_munged(&init_user_ns, opts->gid));
 fs/befs/linuxvfs.c-736-	if (opts->iocharset)
 --
 fs/btrfs/acl.c=19=struct posix_acl *btrfs_get_acl(struct inode *inode, int type, bool rcu)
 --
 fs/btrfs/acl.c-47-	if (size > 0)
 fs/btrfs/acl.c:48:		acl = posix_acl_from_xattr(&init_user_ns, value, size);
 fs/btrfs/acl.c-49-	else if (size == -ENODATA || size == 0)
 --
 fs/btrfs/acl.c=57=int __btrfs_set_acl(struct btrfs_trans_handle *trans, struct inode *inode,
 --
 fs/btrfs/acl.c-85-		nofs_flag = memalloc_nofs_save();
 fs/btrfs/acl.c:86:		value = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_KERNEL);
 fs/btrfs/acl.c-87-		memalloc_nofs_restore(nofs_flag);
 --
 fs/ceph/acl.c=33=struct posix_acl *ceph_get_acl(struct inode *inode, int type, bool rcu)
 --
 fs/ceph/acl.c-72-	if (size > 0) {
 fs/ceph/acl.c:73:		acl = posix_acl_from_xattr(&init_user_ns, value, size);
 fs/ceph/acl.c-74-	} else if (size == -ENODATA || size == 0) {
 --
 fs/ceph/acl.c=90=int ceph_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 --
 fs/ceph/acl.c-129-	if (acl) {
 fs/ceph/acl.c:130:		value = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_NOFS);
 fs/ceph/acl.c-131-		if (!value) {
 --
 fs/ceph/acl.c=165=int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
 --
 fs/ceph/acl.c-205-		err = -ENOMEM;
 fs/ceph/acl.c:206:		tmp_buf1 = posix_acl_to_xattr(&init_user_ns, acl,
 fs/ceph/acl.c-207-					      &val_size1, GFP_KERNEL);
 --
 fs/ceph/acl.c-221-		err = -ENOMEM;
 fs/ceph/acl.c:222:		tmp_buf2 = posix_acl_to_xattr(&init_user_ns, default_acl,
 fs/ceph/acl.c-223-					      &val_size2, GFP_KERNEL);
 --
 fs/ceph/caps.c=1244=static void encode_cap_msg(struct ceph_msg *msg, struct cap_msg_args *arg)
 --
 fs/ceph/caps.c-1291-
 fs/ceph/caps.c:1292:	fc->uid = cpu_to_le32(from_kuid(&init_user_ns, arg->uid));
 fs/ceph/caps.c:1293:	fc->gid = cpu_to_le32(from_kgid(&init_user_ns, arg->gid));
 fs/ceph/caps.c-1294-	fc->mode = cpu_to_le32(arg->mode);
 --
 fs/ceph/caps.c=3485=static void handle_cap_grant(struct inode *inode,
 --
 fs/ceph/caps.c-3580-			inode->i_mode = mode;
 fs/ceph/caps.c:3581:		inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(grant->uid));
 fs/ceph/caps.c:3582:		inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(grant->gid));
 fs/ceph/caps.c-3583-		ci->i_btime = extra_info->btime;
 --
 fs/ceph/caps.c-3585-		      ceph_vinop(inode), inode->i_mode,
 fs/ceph/caps.c:3586:		      from_kuid(&init_user_ns, inode->i_uid),
 fs/ceph/caps.c:3587:		      from_kgid(&init_user_ns, inode->i_gid));
 fs/ceph/caps.c-3588-#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
 --
 fs/ceph/file.c=652=static int ceph_finish_async_create(struct inode *dir, struct inode *inode,
 --
 fs/ceph/file.c-698-	in.xattr_version = cpu_to_le64(1);
 fs/ceph/file.c:699:	in.uid = cpu_to_le32(from_kuid(&init_user_ns,
 fs/ceph/file.c-700-				       mapped_fsuid(req->r_mnt_idmap,
 fs/ceph/file.c:701:						    &init_user_ns)));
 fs/ceph/file.c-702-	if (dir->i_mode & S_ISGID) {
 fs/ceph/file.c:703:		in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_gid));
 fs/ceph/file.c-704-
 --
 fs/ceph/file.c-708-	} else {
 fs/ceph/file.c:709:		in.gid = cpu_to_le32(from_kgid(&init_user_ns,
 fs/ceph/file.c-710-				     mapped_fsgid(req->r_mnt_idmap,
 fs/ceph/file.c:711:						  &init_user_ns)));
 fs/ceph/file.c-712-	}
 --
 fs/ceph/inode.c=975=int ceph_fill_inode(struct inode *inode, struct page *locked_page,
 --
 fs/ceph/inode.c-1094-		inode->i_mode = mode;
 fs/ceph/inode.c:1095:		inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
 fs/ceph/inode.c:1096:		inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
 fs/ceph/inode.c-1097-		doutc(cl, "%p %llx.%llx mode 0%o uid.gid %d.%d\n", inode,
 fs/ceph/inode.c-1098-		      ceph_vinop(inode), inode->i_mode,
 fs/ceph/inode.c:1099:		      from_kuid(&init_user_ns, inode->i_uid),
 fs/ceph/inode.c:1100:		      from_kgid(&init_user_ns, inode->i_gid));
 fs/ceph/inode.c-1101-		ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
 --
 fs/ceph/inode.c=2528=int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode,
 --
 fs/ceph/inode.c-2645-		      ceph_vinop(inode),
 fs/ceph/inode.c:2646:		      from_kuid(&init_user_ns, inode->i_uid),
 fs/ceph/inode.c:2647:		      from_kuid(&init_user_ns, attr->ia_uid));
 fs/ceph/inode.c-2648-		if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) {
 --
 fs/ceph/inode.c-2653-			req->r_args.setattr.uid = cpu_to_le32(
 fs/ceph/inode.c:2654:				from_kuid(&init_user_ns, fsuid));
 fs/ceph/inode.c-2655-			mask |= CEPH_SETATTR_UID;
 --
 fs/ceph/inode.c-2663-		      ceph_vinop(inode),
 fs/ceph/inode.c:2664:		      from_kgid(&init_user_ns, inode->i_gid),
 fs/ceph/inode.c:2665:		      from_kgid(&init_user_ns, attr->ia_gid));
 fs/ceph/inode.c-2666-		if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) {
 --
 fs/ceph/inode.c-2671-			req->r_args.setattr.gid = cpu_to_le32(
 fs/ceph/inode.c:2672:				from_kgid(&init_user_ns, fsgid));
 fs/ceph/inode.c-2673-			mask |= CEPH_SETATTR_GID;
 --
 fs/ceph/mds_client.c=2933=static void encode_mclientrequest_tail(void **p,
 --
 fs/ceph/mds_client.c-2944-	for (i = 0; i < req->r_cred->group_info->ngroups; i++)
 fs/ceph/mds_client.c:2945:		ceph_encode_64(p, from_kgid(&init_user_ns,
 fs/ceph/mds_client.c-2946-					    req->r_cred->group_info->gid[i]));
 --
 fs/ceph/mds_client.c=2995=static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
 --
 fs/ceph/mds_client.c-3141-
 fs/ceph/mds_client.c:3142:			caller_fsuid = from_vfsuid(req->r_mnt_idmap, &init_user_ns,
 fs/ceph/mds_client.c-3143-						   VFSUIDT_INIT(req->r_cred->fsuid));
 fs/ceph/mds_client.c:3144:			caller_fsgid = from_vfsgid(req->r_mnt_idmap, &init_user_ns,
 fs/ceph/mds_client.c-3145-						   VFSGIDT_INIT(req->r_cred->fsgid));
 --
 fs/ceph/mds_client.c-3185-		if (IS_CEPH_MDS_OP_NEWINODE(req->r_op)) {
 fs/ceph/mds_client.c:3186:			owner_fsuid = from_vfsuid(req->r_mnt_idmap, &init_user_ns,
 fs/ceph/mds_client.c-3187-						VFSUIDT_INIT(req->r_cred->fsuid));
 fs/ceph/mds_client.c:3188:			owner_fsgid = from_vfsgid(req->r_mnt_idmap, &init_user_ns,
 fs/ceph/mds_client.c-3189-						VFSGIDT_INIT(req->r_cred->fsgid));
 fs/ceph/mds_client.c:3190:			nhead->owner_uid = cpu_to_le32(from_kuid(&init_user_ns, owner_fsuid));
 fs/ceph/mds_client.c:3191:			nhead->owner_gid = cpu_to_le32(from_kgid(&init_user_ns, owner_fsgid));
 fs/ceph/mds_client.c-3192-		} else {
 --
 fs/ceph/mds_client.c-3203-	lhead->op = cpu_to_le32(req->r_op);
 fs/ceph/mds_client.c:3204:	lhead->caller_uid = cpu_to_le32(from_kuid(&init_user_ns,
 fs/ceph/mds_client.c-3205-						  caller_fsuid));
 fs/ceph/mds_client.c:3206:	lhead->caller_gid = cpu_to_le32(from_kgid(&init_user_ns,
 fs/ceph/mds_client.c-3207-						  caller_fsgid));
 --
 fs/ceph/mds_client.c=5668=static int ceph_mds_auth_match(struct ceph_mds_client *mdsc,
 --
 fs/ceph/mds_client.c-5672-{
 fs/ceph/mds_client.c:5673:	u32 caller_uid = from_kuid(&init_user_ns, cred->fsuid);
 fs/ceph/mds_client.c:5674:	u32 caller_gid = from_kgid(&init_user_ns, cred->fsgid);
 fs/ceph/mds_client.c-5675-	struct ceph_client *cl = mdsc->fsc->client;
 --
 fs/ceph/mds_client.c-5700-				for (i = 0; i < cred->group_info->ngroups; i++) {
 fs/ceph/mds_client.c:5701:					gid = from_kgid(&init_user_ns,
 fs/ceph/mds_client.c-5702-							cred->group_info->gid[i]);
 --
 fs/ceph/mds_client.c=5788=int ceph_mds_check_access(struct ceph_mds_client *mdsc, char *tpath, int mask)
 --
 fs/ceph/mds_client.c-5790-	const struct cred *cred = get_current_cred();
 fs/ceph/mds_client.c:5791:	u32 caller_uid = from_kuid(&init_user_ns, cred->fsuid);
 fs/ceph/mds_client.c:5792:	u32 caller_gid = from_kgid(&init_user_ns, cred->fsgid);
 fs/ceph/mds_client.c-5793-	struct ceph_mds_cap_auth *rw_perms_s = NULL;
 --
 fs/coda/coda_linux.c=105=void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
 --
 fs/coda/coda_linux.c-115-        if (attr->va_uid != -1) 
 fs/coda/coda_linux.c:116:	        inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
 fs/coda/coda_linux.c-117-        if (attr->va_gid != -1)
 fs/coda/coda_linux.c:118:	        inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
 fs/coda/coda_linux.c-119-	if (attr->va_nlink != -1)
 --
 fs/coda/coda_linux.c=145=void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
 --
 fs/coda/coda_linux.c-189-        if ( valid & ATTR_UID ) {
 fs/coda/coda_linux.c:190:                vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
 fs/coda/coda_linux.c-191-	}
 fs/coda/coda_linux.c-192-        if ( valid & ATTR_GID ) {
 fs/coda/coda_linux.c:193:                vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
 fs/coda/coda_linux.c-194-	}
 --
 fs/coda/psdev.c=268=static int coda_psdev_open(struct inode * inode, struct file * file)
 --
 fs/coda/psdev.c-275-
 fs/coda/psdev.c:276:	if (current_user_ns() != &init_user_ns)
 fs/coda/psdev.c-277-		return -EINVAL;
 --
 fs/coda/upcall.c=45=static void *alloc_upcall(int opcode, int size)
 --
 fs/coda/upcall.c-55-	inp->ih.pgid = task_pgrp_nr_ns(current, &init_pid_ns);
 fs/coda/upcall.c:56:	inp->ih.uid = from_kuid(&init_user_ns, current_fsuid());
 fs/coda/upcall.c-57-
 --
 fs/coda/upcall.c=160=int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
 --
 fs/coda/upcall.c-169-	
 fs/coda/upcall.c:170:	inp->ih.uid = from_kuid(&init_user_ns, uid);
 fs/coda/upcall.c-171-        inp->coda_close.VFid = *fid;
 --
 fs/coredump.c=236=static bool coredump_parse(struct core_name *cn, struct coredump_params *cprm,
 --
 fs/coredump.c-384-				err = cn_printf(cn, "%u",
 fs/coredump.c:385:						from_kuid(&init_user_ns,
 fs/coredump.c-386-							  cred->uid));
 --
 fs/coredump.c-390-				err = cn_printf(cn, "%u",
 fs/coredump.c:391:						from_kgid(&init_user_ns,
 fs/coredump.c-392-							  cred->gid));
 --
 fs/debugfs/inode.c=198=static int debugfs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/debugfs/inode.c-203-		seq_printf(m, ",uid=%u",
 fs/debugfs/inode.c:204:			   from_kuid_munged(&init_user_ns, fsi->uid));
 fs/debugfs/inode.c-205-	if (!gid_eq(fsi->gid, GLOBAL_ROOT_GID))
 fs/debugfs/inode.c-206-		seq_printf(m, ",gid=%u",
 fs/debugfs/inode.c:207:			   from_kgid_munged(&init_user_ns, fsi->gid));
 fs/debugfs/inode.c-208-	if (fsi->mode != DEBUGFS_DEFAULT_MODE)
 --
 fs/devpts/inode.c=336=static int devpts_show_options(struct seq_file *seq, struct dentry *root)
 --
 fs/devpts/inode.c-342-		seq_printf(seq, ",uid=%u",
 fs/devpts/inode.c:343:			   from_kuid_munged(&init_user_ns, opts->uid));
 fs/devpts/inode.c-344-	if (opts->setgid)
 fs/devpts/inode.c-345-		seq_printf(seq, ",gid=%u",
 fs/devpts/inode.c:346:			   from_kgid_munged(&init_user_ns, opts->gid));
 fs/devpts/inode.c-347-	seq_printf(seq, ",mode=%03o", opts->mode);
 --
 fs/ecryptfs/main.c=435=static int ecryptfs_get_tree(struct fs_context *fc)
 --
 fs/ecryptfs/main.c-508-			i_uid_read(d_inode(path.dentry)),
 fs/ecryptfs/main.c:509:			from_kuid(&init_user_ns, current_uid()));
 fs/ecryptfs/main.c-510-		goto out_free;
 --
 fs/ecryptfs/messaging.c=21=static int ecryptfs_hash_bits;
 fs/ecryptfs/messaging.c-22-#define ecryptfs_current_euid_hash(uid) \
 fs/ecryptfs/messaging.c:23:	hash_long((unsigned long)from_kuid(&init_user_ns, current_euid()), ecryptfs_hash_bits)
 fs/ecryptfs/messaging.c-24-
 --
 fs/efivarfs/super.c=65=static int efivarfs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/efivarfs/super.c-72-		seq_printf(m, ",uid=%u",
 fs/efivarfs/super.c:73:				from_kuid_munged(&init_user_ns, opts->uid));
 fs/efivarfs/super.c-74-	if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
 fs/efivarfs/super.c-75-		seq_printf(m, ",gid=%u",
 fs/efivarfs/super.c:76:				from_kgid_munged(&init_user_ns, opts->gid));
 fs/efivarfs/super.c-77-	return 0;
 --
 fs/erofs/xattr.c=552=struct posix_acl *erofs_get_acl(struct inode *inode, int type, bool rcu)
 --
 fs/erofs/xattr.c-584-	else
 fs/erofs/xattr.c:585:		acl = posix_acl_from_xattr(&init_user_ns, value, rc);
 fs/erofs/xattr.c-586-	kfree(value);
 --
 fs/exec.c=1293=void would_dump(struct linux_binprm *bprm, struct file *file)
 --
 fs/exec.c-1302-		user_ns = old = bprm->mm->user_ns;
]
]

gemini-3-flash-preview

							input: 65466
							output: 37
							thoughts: 36
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience:

**Refining My Search Strategy**

Alright, that initial `grep` on `init_user_ns` just dumped way too much data. I need to narrow down the scope of my investigation. It's clear I'm dealing with a potentially large code base, and a broad search is giving me a firehose of information. Instead of wading through everything, let's target this more precisely. My intuition tells me this issue might be entangled with the network wireless subsystem. Okay, let's re-run the `grep`, but this time let's look for `init_user_ns` specifically within `net/wireless/nl80211.c`. That should focus the search considerably. This should give me a much cleaner and more relevant result set to begin with. Time to refine the approach.

map[Expression:init_user_ns PathPrefix:net/wireless/nl80211.c]

map[Output:
Full output is too long, showing 500 out of 2870 lines.
Use more precise expression if possible.

[arch/arm64/net/bpf_jit_comp.c=990=static void __maybe_unused build_bhb_mitigation(struct jit_ctx *ctx)
 --
 arch/arm64/net/bpf_jit_comp.c-999-
 arch/arm64/net/bpf_jit_comp.c:1000:	if (ns_capable_noaudit(&init_user_ns, CAP_SYS_ADMIN))
 arch/arm64/net/bpf_jit_comp.c-1001-		return;
 --
 arch/powerpc/mm/fault.c=200=static bool bad_kernel_fault(struct pt_regs *regs, unsigned long error_code,
 --
 arch/powerpc/mm/fault.c-208-				    address,
 arch/powerpc/mm/fault.c:209:				    from_kuid(&init_user_ns, current_uid()));
 arch/powerpc/mm/fault.c-210-
 --
 arch/powerpc/mm/fault.c-222-				    str_write_read(is_write), address,
 arch/powerpc/mm/fault.c:223:				    from_kuid(&init_user_ns, current_uid()));
 arch/powerpc/mm/fault.c-224-
 --
 arch/powerpc/mm/fault.c=314=static void sanity_check_fault(bool is_write, bool is_user,
 --
 arch/powerpc/mm/fault.c-325-				   current->comm, current->pid, address,
 arch/powerpc/mm/fault.c:326:				   from_kuid(&init_user_ns, current_uid()));
 arch/powerpc/mm/fault.c-327-		return;
 --
 arch/powerpc/platforms/cell/spufs/inode.c=578=static int spufs_show_options(struct seq_file *m, struct dentry *root)
 --
 arch/powerpc/platforms/cell/spufs/inode.c-584-		seq_printf(m, ",uid=%u",
 arch/powerpc/platforms/cell/spufs/inode.c:585:			   from_kuid_munged(&init_user_ns, inode->i_uid));
 arch/powerpc/platforms/cell/spufs/inode.c-586-	if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID))
 arch/powerpc/platforms/cell/spufs/inode.c-587-		seq_printf(m, ",gid=%u",
 arch/powerpc/platforms/cell/spufs/inode.c:588:			   from_kgid_munged(&init_user_ns, inode->i_gid));
 arch/powerpc/platforms/cell/spufs/inode.c-589-	if ((inode->i_mode & S_IALLUGO) != 0775)
 --
 arch/s390/hypfs/inode.c=231=static int hypfs_show_options(struct seq_file *s, struct dentry *root)
 --
 arch/s390/hypfs/inode.c-234-
 arch/s390/hypfs/inode.c:235:	seq_printf(s, ",uid=%u", from_kuid_munged(&init_user_ns, hypfs_info->uid));
 arch/s390/hypfs/inode.c:236:	seq_printf(s, ",gid=%u", from_kgid_munged(&init_user_ns, hypfs_info->gid));
 arch/s390/hypfs/inode.c-237-	return 0;
 --
 arch/x86/kernel/vm86_32.c=199=static long do_sys_vm86(struct vm86plus_struct __user *user_vm86, bool plus)
 --
 arch/x86/kernel/vm86_32.c-229-			     current->comm, task_pid_nr(current),
 arch/x86/kernel/vm86_32.c:230:			     from_kuid_munged(&init_user_ns, current_uid()));
 arch/x86/kernel/vm86_32.c-231-		return -EPERM;
 --
 arch/x86/mm/fault.c=509=show_fault_oops(struct pt_regs *regs, unsigned long error_code, unsigned long address)
 --
 arch/x86/mm/fault.c-526-			pr_crit("kernel tried to execute NX-protected page - exploit attempt? (uid: %d)\n",
 arch/x86/mm/fault.c:527:				from_kuid(&init_user_ns, current_uid()));
 arch/x86/mm/fault.c-528-		if (pte && pte_present(*pte) && pte_exec(*pte) && !nx &&
 --
 arch/x86/mm/fault.c-531-			pr_crit("unable to execute userspace code (SMEP?) (uid: %d)\n",
 arch/x86/mm/fault.c:532:				from_kuid(&init_user_ns, current_uid()));
 arch/x86/mm/fault.c-533-	}
 --
 arch/x86/net/bpf_jit_comp.c=2134=st:			if (is_imm8(insn->off))
 --
 arch/x86/net/bpf_jit_comp.c-2730-			if (bpf_prog_was_classic(bpf_prog) &&
 arch/x86/net/bpf_jit_comp.c:2731:			    !ns_capable_noaudit(&init_user_ns, CAP_SYS_ADMIN)) {
 arch/x86/net/bpf_jit_comp.c-2732-				u8 *ip = image + addrs[i - 1];
 --
 drivers/android/binder.c=5506=static int binder_ioctl_set_ctx_mgr(struct file *filp,
 --
 drivers/android/binder.c-5525-			pr_err("BINDER_SET_CONTEXT_MGR bad uid %d != %d\n",
 drivers/android/binder.c:5526:			       from_kuid(&init_user_ns, curr_euid),
 drivers/android/binder.c:5527:			       from_kuid(&init_user_ns,
 drivers/android/binder.c-5528-					 context->binder_context_mgr_uid));
 --
 drivers/base/core.c=2654=static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
 --
 drivers/base/core.c-2674-			if (!uid_eq(uid, GLOBAL_ROOT_UID))
 drivers/base/core.c:2675:				add_uevent_var(env, "DEVUID=%u", from_kuid(&init_user_ns, uid));
 drivers/base/core.c-2676-			if (!gid_eq(gid, GLOBAL_ROOT_GID))
 drivers/base/core.c:2677:				add_uevent_var(env, "DEVGID=%u", from_kgid(&init_user_ns, gid));
 drivers/base/core.c-2678-			kfree(tmp);
 --
 drivers/block/ublk_drv.c=1219=static void ublk_store_owner_uid_gid(unsigned int *owner_uid,
 --
 drivers/block/ublk_drv.c-1226-
 drivers/block/ublk_drv.c:1227:	*owner_uid = from_kuid(&init_user_ns, uid);
 drivers/block/ublk_drv.c:1228:	*owner_gid = from_kgid(&init_user_ns, gid);
 drivers/block/ublk_drv.c-1229-}
 --
 drivers/connector/cn_proc.c=171=void proc_id_connector(struct task_struct *task, int which_id)
 --
 drivers/connector/cn_proc.c-189-	if (which_id == PROC_EVENT_UID) {
 drivers/connector/cn_proc.c:190:		ev->event_data.id.r.ruid = from_kuid_munged(&init_user_ns, cred->uid);
 drivers/connector/cn_proc.c:191:		ev->event_data.id.e.euid = from_kuid_munged(&init_user_ns, cred->euid);
 drivers/connector/cn_proc.c-192-	} else if (which_id == PROC_EVENT_GID) {
 drivers/connector/cn_proc.c:193:		ev->event_data.id.r.rgid = from_kgid_munged(&init_user_ns, cred->gid);
 drivers/connector/cn_proc.c:194:		ev->event_data.id.e.egid = from_kgid_munged(&init_user_ns, cred->egid);
 drivers/connector/cn_proc.c-195-	} else {
 --
 drivers/connector/cn_proc.c=395=static void cn_proc_mcast_ctl(struct cn_msg *msg,
 --
 drivers/connector/cn_proc.c-408-	 */
 drivers/connector/cn_proc.c:409:	if ((current_user_ns() != &init_user_ns) ||
 drivers/connector/cn_proc.c-410-	    !task_is_in_init_pid_ns(current))
 --
 drivers/firmware/efi/efi.c=68=struct mm_struct efi_mm = {
 --
 drivers/firmware/efi/efi.c-75-	.mmlist			= LIST_HEAD_INIT(efi_mm.mmlist),
 drivers/firmware/efi/efi.c:76:	.user_ns		= &init_user_ns,
 drivers/firmware/efi/efi.c-77-#ifdef CONFIG_SCHED_MM_CID
 --
 drivers/net/tun.c=3040=static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
 --
 drivers/net/tun.c-3170-		netif_info(tun, drv, tun->dev, "owner set to %u\n",
 drivers/net/tun.c:3171:			   from_kuid(&init_user_ns, tun->owner));
 drivers/net/tun.c-3172-		break;
 --
 drivers/net/tun.c-3183-		netif_info(tun, drv, tun->dev, "group set to %u\n",
 drivers/net/tun.c:3184:			   from_kgid(&init_user_ns, tun->group));
 drivers/net/tun.c-3185-		break;
 --
 drivers/pci/pci-sysfs.c=739=static ssize_t pci_read_config(struct file *filp, struct kobject *kobj,
 --
 drivers/pci/pci-sysfs.c-748-	/* Several chips lock up trying to read undefined config space */
 drivers/pci/pci-sysfs.c:749:	if (file_ns_capable(filp, &init_user_ns, CAP_SYS_ADMIN))
 drivers/pci/pci-sysfs.c-750-		size = dev->cfg_size;
 --
 drivers/tty/tty_audit.c=63=static void tty_audit_log(const char *description, dev_t dev,
 --
 drivers/tty/tty_audit.c-67-	pid_t pid = task_pid_nr(current);
 drivers/tty/tty_audit.c:68:	uid_t uid = from_kuid(&init_user_ns, task_uid(current));
 drivers/tty/tty_audit.c:69:	uid_t loginuid = from_kuid(&init_user_ns, audit_get_loginuid(current));
 drivers/tty/tty_audit.c-70-	unsigned int sessionid = audit_get_sessionid(current);
 --
 drivers/tty/tty_ioctl.c=765=int tty_mode_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 --
 drivers/tty/tty_ioctl.c-842-	case TIOCSLCKTRMIOS:
 drivers/tty/tty_ioctl.c:843:		if (!checkpoint_restore_ns_capable(&init_user_ns))
 drivers/tty/tty_ioctl.c-844-			return -EPERM;
 --
 drivers/tty/tty_ioctl.c-859-	case TIOCSLCKTRMIOS:
 drivers/tty/tty_ioctl.c:860:		if (!checkpoint_restore_ns_capable(&init_user_ns))
 drivers/tty/tty_ioctl.c-861-			return -EPERM;
 --
 drivers/usb/gadget/legacy/inode.c=1965=gadgetfs_make_inode (struct super_block *sb,
 --
 drivers/usb/gadget/legacy/inode.c-1973-		inode->i_mode = mode;
 drivers/usb/gadget/legacy/inode.c:1974:		inode->i_uid = make_kuid(&init_user_ns, default_uid);
 drivers/usb/gadget/legacy/inode.c:1975:		inode->i_gid = make_kgid(&init_user_ns, default_gid);
 drivers/usb/gadget/legacy/inode.c-1976-		simple_inode_init_ts(inode);
 --
 fs/9p/acl.c=21=static struct posix_acl *v9fs_fid_get_acl(struct p9_fid *fid, const char *name)
 --
 fs/9p/acl.c-42-	else
 fs/9p/acl.c:43:		acl = posix_acl_from_xattr(&init_user_ns, value, size);
 fs/9p/acl.c-44-	kfree(value);
 --
 fs/9p/acl.c=155=int v9fs_iop_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 --
 fs/9p/acl.c-169-
 fs/9p/acl.c:170:		value = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_NOFS);
 fs/9p/acl.c-171-		if (!value) {
 --
 fs/9p/acl.c=243=static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl)
 --
 fs/9p/acl.c-253-	/* Set a setxattr request to server */
 fs/9p/acl.c:254:	buffer = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_KERNEL);
 fs/9p/acl.c-255-	if (!buffer)
 --
 fs/9p/fid.c=113=static struct p9_fid *v9fs_fid_find(struct dentry *dentry, kuid_t uid, int any)
 --
 fs/9p/fid.c-117-	p9_debug(P9_DEBUG_VFS, " dentry: %pd (%p) uid %d any %d\n",
 fs/9p/fid.c:118:		 dentry, dentry, from_kuid(&init_user_ns, uid),
 fs/9p/fid.c-119-		 any);
 --
 fs/9p/v9fs.c=148=int v9fs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/9p/v9fs.c-155-		seq_printf(m, ",dfltuid=%u",
 fs/9p/v9fs.c:156:			   from_kuid_munged(&init_user_ns, v9ses->dfltuid));
 fs/9p/v9fs.c-157-	if (!gid_eq(v9ses->dfltgid, V9FS_DEFGID))
 fs/9p/v9fs.c-158-		seq_printf(m, ",dfltgid=%u",
 fs/9p/v9fs.c:159:			   from_kgid_munged(&init_user_ns, v9ses->dfltgid));
 fs/9p/v9fs.c-160-	if (v9ses->afid != ~0)
 --
 fs/9p/v9fs.c-186-		seq_printf(m, ",access=%u",
 fs/9p/v9fs.c:187:			   from_kuid_munged(&init_user_ns, v9ses->uid));
 fs/9p/v9fs.c-188-		break;
 --
 fs/adfs/super.c=101=static int adfs_show_options(struct seq_file *seq, struct dentry *root)
 --
 fs/adfs/super.c-105-	if (!uid_eq(asb->s_uid, GLOBAL_ROOT_UID))
 fs/adfs/super.c:106:		seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, asb->s_uid));
 fs/adfs/super.c-107-	if (!gid_eq(asb->s_gid, GLOBAL_ROOT_GID))
 fs/adfs/super.c:108:		seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, asb->s_gid));
 fs/adfs/super.c-109-	if (asb->s_owner_mask != ADFS_DEFAULT_OWNER_MASK)
 --
 fs/affs/super.c=268=static int affs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/affs/super.c-290-		seq_printf(m, ",setgid=%u",
 fs/affs/super.c:291:			   from_kgid_munged(&init_user_ns, sbi->s_gid));
 fs/affs/super.c-292-	if (affs_test_opt(sbi->s_flags, SF_SETUID))
 fs/affs/super.c-293-		seq_printf(m, ",setuid=%u",
 fs/affs/super.c:294:			   from_kuid_munged(&init_user_ns, sbi->s_uid));
 fs/affs/super.c-295-	if (affs_test_opt(sbi->s_flags, SF_VERBOSE))
 --
 fs/afs/fsclient.c=175=static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
 --
 fs/afs/fsclient.c-187-		mask |= AFS_SET_OWNER;
 fs/afs/fsclient.c:188:		owner = from_kuid(&init_user_ns, attr->ia_uid);
 fs/afs/fsclient.c-189-	}
 --
 fs/afs/fsclient.c-192-		mask |= AFS_SET_GROUP;
 fs/afs/fsclient.c:193:		group = from_kgid(&init_user_ns, attr->ia_gid);
 fs/afs/fsclient.c-194-	}
 --
 fs/afs/inode.c=153=static int afs_inode_init_from_status(struct afs_operation *op,
 --
 fs/afs/inode.c-181-	inode->i_flags |= S_NOATIME;
 fs/afs/inode.c:182:	inode->i_uid = make_kuid(&init_user_ns, status->owner);
 fs/afs/inode.c:183:	inode->i_gid = make_kgid(&init_user_ns, status->group);
 fs/afs/inode.c-184-	set_nlink(&vnode->netfs.inode, status->nlink);
 --
 fs/afs/inode.c=251=static void afs_apply_status(struct afs_operation *op,
 --
 fs/afs/inode.c-282-	if (status->owner != vnode->status.owner)
 fs/afs/inode.c:283:		inode->i_uid = make_kuid(&init_user_ns, status->owner);
 fs/afs/inode.c-284-
 fs/afs/inode.c-285-	if (status->group != vnode->status.group)
 fs/afs/inode.c:286:		inode->i_gid = make_kgid(&init_user_ns, status->group);
 fs/afs/inode.c-287-
 --
 fs/afs/yfsclient.c=265=static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
 --
 fs/afs/yfsclient.c-278-		mask |= AFS_SET_OWNER;
 fs/afs/yfsclient.c:279:		owner = from_kuid(&init_user_ns, attr->ia_uid);
 fs/afs/yfsclient.c-280-	}
 --
 fs/afs/yfsclient.c-283-		mask |= AFS_SET_GROUP;
 fs/afs/yfsclient.c:284:		group = from_kgid(&init_user_ns, attr->ia_gid);
 fs/afs/yfsclient.c-285-	}
 --
 fs/autofs/inode.c=63=static int autofs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/autofs/inode.c-73-		seq_printf(m, ",uid=%u",
 fs/autofs/inode.c:74:			from_kuid_munged(&init_user_ns, root_inode->i_uid));
 fs/autofs/inode.c-75-	if (!gid_eq(root_inode->i_gid, GLOBAL_ROOT_GID))
 fs/autofs/inode.c-76-		seq_printf(m, ",gid=%u",
 fs/autofs/inode.c:77:			from_kgid_munged(&init_user_ns, root_inode->i_gid));
 fs/autofs/inode.c-78-	seq_printf(m, ",pgrp=%d", pid_vnr(sbi->oz_pgrp));
 --
 fs/befs/linuxvfs.c=299=static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
 --
 fs/befs/linuxvfs.c-348-		befs_sb->mount_opts.uid :
 fs/befs/linuxvfs.c:349:		make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid));
 fs/befs/linuxvfs.c-350-	inode->i_gid = befs_sb->mount_opts.use_gid ?
 fs/befs/linuxvfs.c-351-		befs_sb->mount_opts.gid :
 fs/befs/linuxvfs.c:352:		make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid));
 fs/befs/linuxvfs.c-353-
 --
 fs/befs/linuxvfs.c=725=static int befs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/befs/linuxvfs.c-731-		seq_printf(m, ",uid=%u",
 fs/befs/linuxvfs.c:732:			   from_kuid_munged(&init_user_ns, opts->uid));
 fs/befs/linuxvfs.c-733-	if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
 fs/befs/linuxvfs.c-734-		seq_printf(m, ",gid=%u",
 fs/befs/linuxvfs.c:735:			   from_kgid_munged(&init_user_ns, opts->gid));
 fs/befs/linuxvfs.c-736-	if (opts->iocharset)
 --
 fs/btrfs/acl.c=19=struct posix_acl *btrfs_get_acl(struct inode *inode, int type, bool rcu)
 --
 fs/btrfs/acl.c-47-	if (size > 0)
 fs/btrfs/acl.c:48:		acl = posix_acl_from_xattr(&init_user_ns, value, size);
 fs/btrfs/acl.c-49-	else if (size == -ENODATA || size == 0)
 --
 fs/btrfs/acl.c=57=int __btrfs_set_acl(struct btrfs_trans_handle *trans, struct inode *inode,
 --
 fs/btrfs/acl.c-85-		nofs_flag = memalloc_nofs_save();
 fs/btrfs/acl.c:86:		value = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_KERNEL);
 fs/btrfs/acl.c-87-		memalloc_nofs_restore(nofs_flag);
 --
 fs/ceph/acl.c=33=struct posix_acl *ceph_get_acl(struct inode *inode, int type, bool rcu)
 --
 fs/ceph/acl.c-72-	if (size > 0) {
 fs/ceph/acl.c:73:		acl = posix_acl_from_xattr(&init_user_ns, value, size);
 fs/ceph/acl.c-74-	} else if (size == -ENODATA || size == 0) {
 --
 fs/ceph/acl.c=90=int ceph_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 --
 fs/ceph/acl.c-129-	if (acl) {
 fs/ceph/acl.c:130:		value = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_NOFS);
 fs/ceph/acl.c-131-		if (!value) {
 --
 fs/ceph/acl.c=165=int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
 --
 fs/ceph/acl.c-205-		err = -ENOMEM;
 fs/ceph/acl.c:206:		tmp_buf1 = posix_acl_to_xattr(&init_user_ns, acl,
 fs/ceph/acl.c-207-					      &val_size1, GFP_KERNEL);
 --
 fs/ceph/acl.c-221-		err = -ENOMEM;
 fs/ceph/acl.c:222:		tmp_buf2 = posix_acl_to_xattr(&init_user_ns, default_acl,
 fs/ceph/acl.c-223-					      &val_size2, GFP_KERNEL);
 --
 fs/ceph/caps.c=1244=static void encode_cap_msg(struct ceph_msg *msg, struct cap_msg_args *arg)
 --
 fs/ceph/caps.c-1291-
 fs/ceph/caps.c:1292:	fc->uid = cpu_to_le32(from_kuid(&init_user_ns, arg->uid));
 fs/ceph/caps.c:1293:	fc->gid = cpu_to_le32(from_kgid(&init_user_ns, arg->gid));
 fs/ceph/caps.c-1294-	fc->mode = cpu_to_le32(arg->mode);
 --
 fs/ceph/caps.c=3485=static void handle_cap_grant(struct inode *inode,
 --
 fs/ceph/caps.c-3580-			inode->i_mode = mode;
 fs/ceph/caps.c:3581:		inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(grant->uid));
 fs/ceph/caps.c:3582:		inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(grant->gid));
 fs/ceph/caps.c-3583-		ci->i_btime = extra_info->btime;
 --
 fs/ceph/caps.c-3585-		      ceph_vinop(inode), inode->i_mode,
 fs/ceph/caps.c:3586:		      from_kuid(&init_user_ns, inode->i_uid),
 fs/ceph/caps.c:3587:		      from_kgid(&init_user_ns, inode->i_gid));
 fs/ceph/caps.c-3588-#if IS_ENABLED(CONFIG_FS_ENCRYPTION)
 --
 fs/ceph/file.c=652=static int ceph_finish_async_create(struct inode *dir, struct inode *inode,
 --
 fs/ceph/file.c-698-	in.xattr_version = cpu_to_le64(1);
 fs/ceph/file.c:699:	in.uid = cpu_to_le32(from_kuid(&init_user_ns,
 fs/ceph/file.c-700-				       mapped_fsuid(req->r_mnt_idmap,
 fs/ceph/file.c:701:						    &init_user_ns)));
 fs/ceph/file.c-702-	if (dir->i_mode & S_ISGID) {
 fs/ceph/file.c:703:		in.gid = cpu_to_le32(from_kgid(&init_user_ns, dir->i_gid));
 fs/ceph/file.c-704-
 --
 fs/ceph/file.c-708-	} else {
 fs/ceph/file.c:709:		in.gid = cpu_to_le32(from_kgid(&init_user_ns,
 fs/ceph/file.c-710-				     mapped_fsgid(req->r_mnt_idmap,
 fs/ceph/file.c:711:						  &init_user_ns)));
 fs/ceph/file.c-712-	}
 --
 fs/ceph/inode.c=975=int ceph_fill_inode(struct inode *inode, struct page *locked_page,
 --
 fs/ceph/inode.c-1094-		inode->i_mode = mode;
 fs/ceph/inode.c:1095:		inode->i_uid = make_kuid(&init_user_ns, le32_to_cpu(info->uid));
 fs/ceph/inode.c:1096:		inode->i_gid = make_kgid(&init_user_ns, le32_to_cpu(info->gid));
 fs/ceph/inode.c-1097-		doutc(cl, "%p %llx.%llx mode 0%o uid.gid %d.%d\n", inode,
 fs/ceph/inode.c-1098-		      ceph_vinop(inode), inode->i_mode,
 fs/ceph/inode.c:1099:		      from_kuid(&init_user_ns, inode->i_uid),
 fs/ceph/inode.c:1100:		      from_kgid(&init_user_ns, inode->i_gid));
 fs/ceph/inode.c-1101-		ceph_decode_timespec64(&ci->i_btime, &iinfo->btime);
 --
 fs/ceph/inode.c=2528=int __ceph_setattr(struct mnt_idmap *idmap, struct inode *inode,
 --
 fs/ceph/inode.c-2645-		      ceph_vinop(inode),
 fs/ceph/inode.c:2646:		      from_kuid(&init_user_ns, inode->i_uid),
 fs/ceph/inode.c:2647:		      from_kuid(&init_user_ns, attr->ia_uid));
 fs/ceph/inode.c-2648-		if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) {
 --
 fs/ceph/inode.c-2653-			req->r_args.setattr.uid = cpu_to_le32(
 fs/ceph/inode.c:2654:				from_kuid(&init_user_ns, fsuid));
 fs/ceph/inode.c-2655-			mask |= CEPH_SETATTR_UID;
 --
 fs/ceph/inode.c-2663-		      ceph_vinop(inode),
 fs/ceph/inode.c:2664:		      from_kgid(&init_user_ns, inode->i_gid),
 fs/ceph/inode.c:2665:		      from_kgid(&init_user_ns, attr->ia_gid));
 fs/ceph/inode.c-2666-		if (!do_sync && (issued & CEPH_CAP_AUTH_EXCL)) {
 --
 fs/ceph/inode.c-2671-			req->r_args.setattr.gid = cpu_to_le32(
 fs/ceph/inode.c:2672:				from_kgid(&init_user_ns, fsgid));
 fs/ceph/inode.c-2673-			mask |= CEPH_SETATTR_GID;
 --
 fs/ceph/mds_client.c=2933=static void encode_mclientrequest_tail(void **p,
 --
 fs/ceph/mds_client.c-2944-	for (i = 0; i < req->r_cred->group_info->ngroups; i++)
 fs/ceph/mds_client.c:2945:		ceph_encode_64(p, from_kgid(&init_user_ns,
 fs/ceph/mds_client.c-2946-					    req->r_cred->group_info->gid[i]));
 --
 fs/ceph/mds_client.c=2995=static struct ceph_msg *create_request_message(struct ceph_mds_session *session,
 --
 fs/ceph/mds_client.c-3141-
 fs/ceph/mds_client.c:3142:			caller_fsuid = from_vfsuid(req->r_mnt_idmap, &init_user_ns,
 fs/ceph/mds_client.c-3143-						   VFSUIDT_INIT(req->r_cred->fsuid));
 fs/ceph/mds_client.c:3144:			caller_fsgid = from_vfsgid(req->r_mnt_idmap, &init_user_ns,
 fs/ceph/mds_client.c-3145-						   VFSGIDT_INIT(req->r_cred->fsgid));
 --
 fs/ceph/mds_client.c-3185-		if (IS_CEPH_MDS_OP_NEWINODE(req->r_op)) {
 fs/ceph/mds_client.c:3186:			owner_fsuid = from_vfsuid(req->r_mnt_idmap, &init_user_ns,
 fs/ceph/mds_client.c-3187-						VFSUIDT_INIT(req->r_cred->fsuid));
 fs/ceph/mds_client.c:3188:			owner_fsgid = from_vfsgid(req->r_mnt_idmap, &init_user_ns,
 fs/ceph/mds_client.c-3189-						VFSGIDT_INIT(req->r_cred->fsgid));
 fs/ceph/mds_client.c:3190:			nhead->owner_uid = cpu_to_le32(from_kuid(&init_user_ns, owner_fsuid));
 fs/ceph/mds_client.c:3191:			nhead->owner_gid = cpu_to_le32(from_kgid(&init_user_ns, owner_fsgid));
 fs/ceph/mds_client.c-3192-		} else {
 --
 fs/ceph/mds_client.c-3203-	lhead->op = cpu_to_le32(req->r_op);
 fs/ceph/mds_client.c:3204:	lhead->caller_uid = cpu_to_le32(from_kuid(&init_user_ns,
 fs/ceph/mds_client.c-3205-						  caller_fsuid));
 fs/ceph/mds_client.c:3206:	lhead->caller_gid = cpu_to_le32(from_kgid(&init_user_ns,
 fs/ceph/mds_client.c-3207-						  caller_fsgid));
 --
 fs/ceph/mds_client.c=5668=static int ceph_mds_auth_match(struct ceph_mds_client *mdsc,
 --
 fs/ceph/mds_client.c-5672-{
 fs/ceph/mds_client.c:5673:	u32 caller_uid = from_kuid(&init_user_ns, cred->fsuid);
 fs/ceph/mds_client.c:5674:	u32 caller_gid = from_kgid(&init_user_ns, cred->fsgid);
 fs/ceph/mds_client.c-5675-	struct ceph_client *cl = mdsc->fsc->client;
 --
 fs/ceph/mds_client.c-5700-				for (i = 0; i < cred->group_info->ngroups; i++) {
 fs/ceph/mds_client.c:5701:					gid = from_kgid(&init_user_ns,
 fs/ceph/mds_client.c-5702-							cred->group_info->gid[i]);
 --
 fs/ceph/mds_client.c=5788=int ceph_mds_check_access(struct ceph_mds_client *mdsc, char *tpath, int mask)
 --
 fs/ceph/mds_client.c-5790-	const struct cred *cred = get_current_cred();
 fs/ceph/mds_client.c:5791:	u32 caller_uid = from_kuid(&init_user_ns, cred->fsuid);
 fs/ceph/mds_client.c:5792:	u32 caller_gid = from_kgid(&init_user_ns, cred->fsgid);
 fs/ceph/mds_client.c-5793-	struct ceph_mds_cap_auth *rw_perms_s = NULL;
 --
 fs/coda/coda_linux.c=105=void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
 --
 fs/coda/coda_linux.c-115-        if (attr->va_uid != -1) 
 fs/coda/coda_linux.c:116:	        inode->i_uid = make_kuid(&init_user_ns, (uid_t) attr->va_uid);
 fs/coda/coda_linux.c-117-        if (attr->va_gid != -1)
 fs/coda/coda_linux.c:118:	        inode->i_gid = make_kgid(&init_user_ns, (gid_t) attr->va_gid);
 fs/coda/coda_linux.c-119-	if (attr->va_nlink != -1)
 --
 fs/coda/coda_linux.c=145=void coda_iattr_to_vattr(struct iattr *iattr, struct coda_vattr *vattr)
 --
 fs/coda/coda_linux.c-189-        if ( valid & ATTR_UID ) {
 fs/coda/coda_linux.c:190:                vattr->va_uid = (vuid_t) from_kuid(&init_user_ns, iattr->ia_uid);
 fs/coda/coda_linux.c-191-	}
 fs/coda/coda_linux.c-192-        if ( valid & ATTR_GID ) {
 fs/coda/coda_linux.c:193:                vattr->va_gid = (vgid_t) from_kgid(&init_user_ns, iattr->ia_gid);
 fs/coda/coda_linux.c-194-	}
 --
 fs/coda/psdev.c=268=static int coda_psdev_open(struct inode * inode, struct file * file)
 --
 fs/coda/psdev.c-275-
 fs/coda/psdev.c:276:	if (current_user_ns() != &init_user_ns)
 fs/coda/psdev.c-277-		return -EINVAL;
 --
 fs/coda/upcall.c=45=static void *alloc_upcall(int opcode, int size)
 --
 fs/coda/upcall.c-55-	inp->ih.pgid = task_pgrp_nr_ns(current, &init_pid_ns);
 fs/coda/upcall.c:56:	inp->ih.uid = from_kuid(&init_user_ns, current_fsuid());
 fs/coda/upcall.c-57-
 --
 fs/coda/upcall.c=160=int venus_close(struct super_block *sb, struct CodaFid *fid, int flags,
 --
 fs/coda/upcall.c-169-	
 fs/coda/upcall.c:170:	inp->ih.uid = from_kuid(&init_user_ns, uid);
 fs/coda/upcall.c-171-        inp->coda_close.VFid = *fid;
 --
 fs/coredump.c=236=static bool coredump_parse(struct core_name *cn, struct coredump_params *cprm,
 --
 fs/coredump.c-384-				err = cn_printf(cn, "%u",
 fs/coredump.c:385:						from_kuid(&init_user_ns,
 fs/coredump.c-386-							  cred->uid));
 --
 fs/coredump.c-390-				err = cn_printf(cn, "%u",
 fs/coredump.c:391:						from_kgid(&init_user_ns,
 fs/coredump.c-392-							  cred->gid));
 --
 fs/debugfs/inode.c=198=static int debugfs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/debugfs/inode.c-203-		seq_printf(m, ",uid=%u",
 fs/debugfs/inode.c:204:			   from_kuid_munged(&init_user_ns, fsi->uid));
 fs/debugfs/inode.c-205-	if (!gid_eq(fsi->gid, GLOBAL_ROOT_GID))
 fs/debugfs/inode.c-206-		seq_printf(m, ",gid=%u",
 fs/debugfs/inode.c:207:			   from_kgid_munged(&init_user_ns, fsi->gid));
 fs/debugfs/inode.c-208-	if (fsi->mode != DEBUGFS_DEFAULT_MODE)
 --
 fs/devpts/inode.c=336=static int devpts_show_options(struct seq_file *seq, struct dentry *root)
 --
 fs/devpts/inode.c-342-		seq_printf(seq, ",uid=%u",
 fs/devpts/inode.c:343:			   from_kuid_munged(&init_user_ns, opts->uid));
 fs/devpts/inode.c-344-	if (opts->setgid)
 fs/devpts/inode.c-345-		seq_printf(seq, ",gid=%u",
 fs/devpts/inode.c:346:			   from_kgid_munged(&init_user_ns, opts->gid));
 fs/devpts/inode.c-347-	seq_printf(seq, ",mode=%03o", opts->mode);
 --
 fs/ecryptfs/main.c=435=static int ecryptfs_get_tree(struct fs_context *fc)
 --
 fs/ecryptfs/main.c-508-			i_uid_read(d_inode(path.dentry)),
 fs/ecryptfs/main.c:509:			from_kuid(&init_user_ns, current_uid()));
 fs/ecryptfs/main.c-510-		goto out_free;
 --
 fs/ecryptfs/messaging.c=21=static int ecryptfs_hash_bits;
 fs/ecryptfs/messaging.c-22-#define ecryptfs_current_euid_hash(uid) \
 fs/ecryptfs/messaging.c:23:	hash_long((unsigned long)from_kuid(&init_user_ns, current_euid()), ecryptfs_hash_bits)
 fs/ecryptfs/messaging.c-24-
 --
 fs/efivarfs/super.c=65=static int efivarfs_show_options(struct seq_file *m, struct dentry *root)
 --
 fs/efivarfs/super.c-72-		seq_printf(m, ",uid=%u",
 fs/efivarfs/super.c:73:				from_kuid_munged(&init_user_ns, opts->uid));
 fs/efivarfs/super.c-74-	if (!gid_eq(opts->gid, GLOBAL_ROOT_GID))
 fs/efivarfs/super.c-75-		seq_printf(m, ",gid=%u",
 fs/efivarfs/super.c:76:				from_kgid_munged(&init_user_ns, opts->gid));
 fs/efivarfs/super.c-77-	return 0;
 --
 fs/erofs/xattr.c=552=struct posix_acl *erofs_get_acl(struct inode *inode, int type, bool rcu)
 --
 fs/erofs/xattr.c-584-	else
 fs/erofs/xattr.c:585:		acl = posix_acl_from_xattr(&init_user_ns, value, rc);
 fs/erofs/xattr.c-586-	kfree(value);
 --
 fs/exec.c=1293=void would_dump(struct linux_binprm *bprm, struct file *file)
 --
 fs/exec.c-1302-		user_ns = old = bprm->mm->user_ns;
]
]

gemini-3-flash-preview

							input: 77835
							output: 39
							thoughts: 29
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, and delivered as a first-person summary:

**Quick Catch: `grep` Mishap**

Right, so I was a bit too casual with that `grep` command. It looks like I let it loose on the entire file system, which is... inefficient, to say the least. Obviously, that's not what I intended. My goal was to pinpoint the information within a specific file. I needed a much more focused approach, and I just wasn't precise enough in my initial query. The key is to narrow down the search. I should have immediately specified the target file within the command, which would have saved time and resources, and given the desired precision. Lesson learned (again!). Let's reel it in and fix that right away.

map[Expression:init_user_ns|capable PathPrefix:net/wireless/nl80211.c]

map[Output:
Full output is too long, showing 500 out of 33188 lines.
Use more precise expression if possible.

[.clang-format=71=ForEachMacros:
 --
 .clang-format-226-  - 'for_each_aggr_pgid'
 .clang-format:227:  - 'for_each_alloc_capable_rdt_resource'
 .clang-format-228-  - 'for_each_and_bit'
 --
 .clang-format-237-  - 'for_each_bvec'
 .clang-format:238:  - 'for_each_capable_rdt_resource'
 .clang-format-239-  - 'for_each_card_auxs'
 --
 .clang-format-337-  - 'for_each_mod_mem_type'
 .clang-format:338:  - 'for_each_mon_capable_rdt_resource'
 .clang-format-339-  - 'for_each_mp_bvec'
 --
 Documentation/ABI/obsolete/sysfs-bus-usb=5=Description:
 --
 Documentation/ABI/obsolete/sysfs-bus-usb-21-
 Documentation/ABI/obsolete/sysfs-bus-usb:22:		Device not capable of proper suspend and resume should be
 Documentation/ABI/obsolete/sysfs-bus-usb-23-		left in the "on" level.  Although the USB spec requires
 --
 Documentation/ABI/stable/sysfs-block=93=Description:
 --
 Documentation/ABI/stable/sysfs-block-105-
 Documentation/ABI/stable/sysfs-block:106:What:		/sys/block/<disk>/integrity/device_is_integrity_capable
 Documentation/ABI/stable/sysfs-block-107-Date:		July 2014
 --
 Documentation/ABI/stable/sysfs-block=109=Description:
 Documentation/ABI/stable/sysfs-block:110:		Indicates whether a storage device is capable of storing
 Documentation/ABI/stable/sysfs-block:111:		integrity metadata. Set if the device is T10 PI-capable.
 Documentation/ABI/stable/sysfs-block-112-		This flag is set to 1 if the storage media is formatted
 --
 Documentation/ABI/stable/sysfs-block=121=Description:
 Documentation/ABI/stable/sysfs-block:122:		Metadata format for integrity capable block device.
 Documentation/ABI/stable/sysfs-block-123-		E.g. T10-DIF-TYPE1-CRC.
 --
 Documentation/ABI/stable/sysfs-block=396=Description:
 --
 Documentation/ABI/stable/sysfs-block-398-		/sys/block/xxx/queue/ directory indicates that the device is
 Documentation/ABI/stable/sysfs-block:399:		capable of executing requests targeting different sector ranges
 Documentation/ABI/stable/sysfs-block-400-		in parallel. For instance, single LUN multi-actuator hard-disks
 --
 Documentation/ABI/stable/sysfs-bus-mhi=37=Description:    Writing a non-zero value to this file will force devices to
 Documentation/ABI/stable/sysfs-bus-mhi-38-                enter EDL (Emergency Download) mode. This entry only exists for
 Documentation/ABI/stable/sysfs-bus-mhi:39:                devices capable of entering the EDL mode using the standard EDL
 Documentation/ABI/stable/sysfs-bus-mhi-40-                triggering mechanism defined in the MHI spec v1.2. Once in EDL
 --
 Documentation/ABI/testing/debugfs-scmi=34=Description:	A boolean stating if the transport configured on the underlying
 Documentation/ABI/testing/debugfs-scmi:35:		SCMI instance <n> is capable of atomic mode of operation.
 Documentation/ABI/testing/debugfs-scmi-36-Users:		Debugging, any userspace test suite
 --
 Documentation/ABI/testing/debugfs-scmi-raw=38=Description:	SCMI Raw message injection/snooping facility using polling mode;
 --
 Documentation/ABI/testing/debugfs-scmi-raw-41-		backend SCMI server for instance <n>, using polling mode on
 Documentation/ABI/testing/debugfs-scmi-raw:42:		the reception path. (if transport is polling capable)
 Documentation/ABI/testing/debugfs-scmi-raw-43-		Any subsequently received response can be read from this same
 --
 Documentation/ABI/testing/debugfs-scmi-raw=54=Description:	SCMI Raw asynchronous message injection/snooping facility using
 --
 Documentation/ABI/testing/debugfs-scmi-raw-58-		polling-mode on the reception path of the immediate part of the
 Documentation/ABI/testing/debugfs-scmi-raw:59:		asynchronous command. (if transport is polling capable)
 Documentation/ABI/testing/debugfs-scmi-raw-60-		Any subsequently received response can be read from this same
 --
 Documentation/ABI/testing/debugfs-scmi-raw=160=Description:	SCMI Raw message injection/snooping facility using polling mode;
 --
 Documentation/ABI/testing/debugfs-scmi-raw-164-		channel, using polling mode on the reception path.
 Documentation/ABI/testing/debugfs-scmi-raw:165:		(if transport is polling capable)
 Documentation/ABI/testing/debugfs-scmi-raw-166-		Any subsequently received response can be read from this same
 --
 Documentation/ABI/testing/debugfs-scmi-raw=185=Description:	SCMI Raw asynchronous message injection/snooping facility using
 --
 Documentation/ABI/testing/debugfs-scmi-raw-190-		path of the immediate part of the asynchronous command.
 Documentation/ABI/testing/debugfs-scmi-raw:191:		(if transport is polling capable)
 Documentation/ABI/testing/debugfs-scmi-raw-192-		Any subsequently received response can be read from this same
 --
 Documentation/ABI/testing/sysfs-bus-cxl=117=Description:
 --
 Documentation/ABI/testing/sysfs-bus-cxl-121-		for persistent memory: 'locked', 'unlocked' or 'frozen'. This
 Documentation/ABI/testing/sysfs-bus-cxl:122:		sysfs entry is select/poll capable from userspace to notify
 Documentation/ABI/testing/sysfs-bus-cxl-123-		upon completion of a sanitize operation.
 --
 Documentation/ABI/testing/sysfs-bus-iio-sps30=14=Description:
 Documentation/ABI/testing/sysfs-bus-iio-sps30:15:		Sensor is capable of triggering self cleaning periodically.
 Documentation/ABI/testing/sysfs-bus-iio-sps30-16-		Period can be changed by writing a new value here. Upon reading
 --
 Documentation/ABI/testing/sysfs-bus-most=175=Description:
 Documentation/ABI/testing/sysfs-bus-most:176:		Indicates the directions the channel is capable of.
 Documentation/ABI/testing/sysfs-bus-most-177-Users:
 --
 Documentation/ABI/testing/sysfs-bus-pci=106=Description:
 --
 Documentation/ABI/testing/sysfs-bus-pci-111-		"irq" being set to 0 indicates that the device isn't
 Documentation/ABI/testing/sysfs-bus-pci:112:		capable of generating legacy INTx interrupts.
 Documentation/ABI/testing/sysfs-bus-pci-113-
 --
 Documentation/ABI/testing/sysfs-bus-pci=519=Description:
 --
 Documentation/ABI/testing/sysfs-bus-pci-522-		PCIe r6.1 sec 6.28) are accessible as led class devices, both
 Documentation/ABI/testing/sysfs-bus-pci:523:		below /sys/class/leds and below NPEM-capable PCI devices.
 Documentation/ABI/testing/sysfs-bus-pci-524-
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer=1=PCIe Device AER statistics
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer-3-
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer:4:These attributes show up under all the devices that are AER capable. These
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer-5-statistical counters indicate the errors "as seen/reported by the device".
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer=96=These attributes show up under only the rootports (or root complex event
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer:97:collectors) that are AER capable. These indicate the number of error messages as
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer-98-"reported to" the rootport. Please note that the rootports also transmit
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer=121=PCIe AER ratelimits
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer-123-
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer:124:These attributes show up under all the devices that are AER capable.
 Documentation/ABI/testing/sysfs-bus-pci-devices-aer-125-They represent configurable ratelimits of logs per error type.
 --
 Documentation/ABI/testing/sysfs-bus-soundwire-slave=19=What:		/sys/bus/soundwire/devices/sdw:.../dev-properties/mipi_revision
 Documentation/ABI/testing/sysfs-bus-soundwire-slave:20:		/sys/bus/soundwire/devices/sdw:.../dev-properties/wake_capable
 Documentation/ABI/testing/sysfs-bus-soundwire-slave:21:		/sys/bus/soundwire/devices/sdw:.../dev-properties/test_mode_capable
 Documentation/ABI/testing/sysfs-bus-soundwire-slave-22-		/sys/bus/soundwire/devices/sdw:.../dev-properties/clk_stop_mode1
 Documentation/ABI/testing/sysfs-bus-soundwire-slave:23:		/sys/bus/soundwire/devices/sdw:.../dev-properties/simple_clk_stop_capable
 Documentation/ABI/testing/sysfs-bus-soundwire-slave-24-		/sys/bus/soundwire/devices/sdw:.../dev-properties/clk_stop_timeout
 --
 Documentation/ABI/testing/sysfs-bus-soundwire-slave-26-		/sys/bus/soundwire/devices/sdw:.../dev-properties/reset_behave
 Documentation/ABI/testing/sysfs-bus-soundwire-slave:27:		/sys/bus/soundwire/devices/sdw:.../dev-properties/high_PHY_capable
 Documentation/ABI/testing/sysfs-bus-soundwire-slave-28-		/sys/bus/soundwire/devices/sdw:.../dev-properties/paging_support
 --
 Documentation/ABI/testing/sysfs-bus-thunderbolt=299=Description:
 --
 Documentation/ABI/testing/sysfs-bus-thunderbolt-301-		created when USB Type-C Connector Class is enabled,
 Documentation/ABI/testing/sysfs-bus-thunderbolt:302:		and only if the system firmware is capable of
 Documentation/ABI/testing/sysfs-bus-thunderbolt-303-		describing the connection between a port and its
 --
 Documentation/ABI/testing/sysfs-bus-usb=96=Description:
 Documentation/ABI/testing/sysfs-bus-usb:97:		If CONFIG_PM is set and a USB 2.0 lpm-capable device is plugged
 Documentation/ABI/testing/sysfs-bus-usb-98-		in to a xHCI host which support link PM, it will perform a LPM
 --
 Documentation/ABI/testing/sysfs-bus-usb=112=Description:
 Documentation/ABI/testing/sysfs-bus-usb:113:		If CONFIG_PM is set and a USB 3.0 lpm-capable device is plugged
 Documentation/ABI/testing/sysfs-bus-usb-114-		in to a xHCI host which supports link PM, it will check if U1
 --
 Documentation/ABI/testing/sysfs-bus-usb-122-
 Documentation/ABI/testing/sysfs-bus-usb:123:What:		/sys/bus/usb/devices/.../ltm_capable
 Documentation/ABI/testing/sysfs-bus-usb-124-Date:		July 2012
 --
 Documentation/ABI/testing/sysfs-bus-usb=126=Description:
 --
 Documentation/ABI/testing/sysfs-bus-usb-129-		in the bmAttributes field of their SuperSpeed BOS descriptors.
 Documentation/ABI/testing/sysfs-bus-usb:130:		If that bit is set for the device, ltm_capable will read "yes".
 Documentation/ABI/testing/sysfs-bus-usb-131-		If the device doesn't support LTM, the file will read "no".
 --
 Documentation/ABI/testing/sysfs-bus-usb=233=Description:
 --
 Documentation/ABI/testing/sysfs-bus-usb-235-		only created when USB Type-C Connector Class is enabled, and
 Documentation/ABI/testing/sysfs-bus-usb:236:		only if the system firmware is capable of describing the
 Documentation/ABI/testing/sysfs-bus-usb-237-		connection between a port and its connector.
 --
 Documentation/ABI/testing/sysfs-bus-usb=605=Description:
 Documentation/ABI/testing/sysfs-bus-usb:606:		Maximum packet size this endpoint is capable of
 Documentation/ABI/testing/sysfs-bus-usb-607-		sending or receiving, in hexadecimal.
 --
 Documentation/ABI/testing/sysfs-class-intel_pmt-features=106=Notes:
 Documentation/ABI/testing/sysfs-class-intel_pmt-features-107-  - Some attributes are only present if the corresponding feature supports
 Documentation/ABI/testing/sysfs-class-intel_pmt-features:108:    the capability (e.g., `max_command_size` for MCTP-capable features).
 Documentation/ABI/testing/sysfs-class-intel_pmt-features-109-  - Features supporting RMIDs include `num_rmids`.
 --
 Documentation/ABI/testing/sysfs-class-mtd=129=Description:
 Documentation/ABI/testing/sysfs-class-mtd:130:		Maximum number of bit errors that the device is capable of
 Documentation/ABI/testing/sysfs-class-mtd-131-		correcting within each region covering an ECC step (see
 --
 Documentation/ABI/testing/sysfs-class-power=365=Description:
 Documentation/ABI/testing/sysfs-class-power-366-		Represents a battery percentage level, above which charging will
 Documentation/ABI/testing/sysfs-class-power:367:		stop. Not all hardware is capable of setting this to an arbitrary
 Documentation/ABI/testing/sysfs-class-power-368-		percentage. Drivers will round written values to the nearest
 --
 Documentation/ABI/testing/sysfs-class-power=664=Description:
 Documentation/ABI/testing/sysfs-class-power-665-		Reports what type of USB connection is currently active for
 Documentation/ABI/testing/sysfs-class-power:666:		the supply, for example it can show if USB-PD capable source
 Documentation/ABI/testing/sysfs-class-power-667-		is attached.
 --
 Documentation/ABI/testing/sysfs-class-typec=203=Description:	USB Power Delivery Specification defines a set of product types
 Documentation/ABI/testing/sysfs-class-typec-204-		for the partner devices. This file will show the product type of
 Documentation/ABI/testing/sysfs-class-typec:205:		the partner if it is known. Dual-role capable partners will have
 Documentation/ABI/testing/sysfs-class-typec-206-		both UFP and DFP product types defined, but only one that
 --
 Documentation/ABI/testing/sysfs-class-typec=238=Description:
 Documentation/ABI/testing/sysfs-class-typec:239:		This directory appears only if the port device driver is capable
 Documentation/ABI/testing/sysfs-class-typec-240-		of showing the result of Discover Identity USB power delivery
 --
 Documentation/ABI/testing/sysfs-class-typec=320=Description:
 Documentation/ABI/testing/sysfs-class-typec:321:		This directory appears only if the port device driver is capable
 Documentation/ABI/testing/sysfs-class-typec-322-		of showing the result of Discover Identity USB power delivery
 --
 Documentation/ABI/testing/sysfs-class-usb_power_delivery=93=Description:
 --
 Documentation/ABI/testing/sysfs-class-usb_power_delivery-98-
 Documentation/ABI/testing/sysfs-class-usb_power_delivery:99:What:		/sys/class/usb_power_delivery/.../<capability>/1:fixed_supply/usb_communication_capable
 Documentation/ABI/testing/sysfs-class-usb_power_delivery-100-Date:		May 2022
 --
 Documentation/ABI/testing/sysfs-devices-power=12=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-30-
 Documentation/ABI/testing/sysfs-devices-power:31:		For the devices that are not capable of generating system wakeup
 Documentation/ABI/testing/sysfs-devices-power-32-		events this file is not present.  In that case the device cannot
 --
 Documentation/ABI/testing/sysfs-devices-power=83=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-85-		of signaled wakeup events associated with the device.  This
 Documentation/ABI/testing/sysfs-devices-power:86:		attribute is read-only.  If the device is not capable to wake up
 Documentation/ABI/testing/sysfs-devices-power-87-		the system from sleep states, this attribute is not present.
 --
 Documentation/ABI/testing/sysfs-devices-power=94=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-97-		the device was completed (at the kernel level).  This attribute
 Documentation/ABI/testing/sysfs-devices-power:98:		is read-only.  If the device is not capable to wake up the
 Documentation/ABI/testing/sysfs-devices-power-99-		system from sleep states, this attribute is not present.  If
 --
 Documentation/ABI/testing/sysfs-devices-power=106=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-110-		state in progress.  This attribute is read-only.  If the device
 Documentation/ABI/testing/sysfs-devices-power:111:		is not capable to wake up the system from sleep states, this
 Documentation/ABI/testing/sysfs-devices-power-112-		attribute is not present.  If the device is not enabled to wake
 --
 Documentation/ABI/testing/sysfs-devices-power=118=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-121-		been reported with a timeout that expired.  This attribute is
 Documentation/ABI/testing/sysfs-devices-power:122:		read-only.  If the device is not capable to wake up the system
 Documentation/ABI/testing/sysfs-devices-power-123-		from sleep states, this attribute is not present.  If the
 --
 Documentation/ABI/testing/sysfs-devices-power=130=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-133-		the device is being processed (1).  This attribute is read-only.
 Documentation/ABI/testing/sysfs-devices-power:134:		If the device is not capable to wake up the system from sleep
 Documentation/ABI/testing/sysfs-devices-power-135-		states, this attribute is not present.  If the device is not
 --
 Documentation/ABI/testing/sysfs-devices-power=142=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-145-		device, in milliseconds.  This attribute is read-only.  If the
 Documentation/ABI/testing/sysfs-devices-power:146:		device is not capable to wake up the system from sleep states,
 Documentation/ABI/testing/sysfs-devices-power-147-		this attribute is not present.  If the device is not enabled to
 --
 Documentation/ABI/testing/sysfs-devices-power=153=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-156-		with the device, in milliseconds.  This attribute is read-only.
 Documentation/ABI/testing/sysfs-devices-power:157:		If the device is not capable to wake up the system from sleep
 Documentation/ABI/testing/sysfs-devices-power-158-		states, this attribute is not present.  If the device is not
 --
 Documentation/ABI/testing/sysfs-devices-power=177=Description:
 --
 Documentation/ABI/testing/sysfs-devices-power-180-		opportunistic transitions to sleep states from occurring.
 Documentation/ABI/testing/sysfs-devices-power:181:		This attribute is read-only.  If the device is not capable to
 Documentation/ABI/testing/sysfs-devices-power-182-		wake up the system from sleep states, this attribute is not
 --
 Documentation/ABI/testing/sysfs-driver-hid-logitech-hidpp=15=Description:
 Documentation/ABI/testing/sysfs-driver-hid-logitech-hidpp:16:		Presence of this file indicates that HID++ driver is capable of
 Documentation/ABI/testing/sysfs-driver-hid-logitech-hidpp-17-		handling battery properties in the kernel. This way, upower can
 --
 Documentation/PCI/acpi-info.rst=96=address always corresponds to bus 0, even if the bus range below the bridge
 --
 Documentation/PCI/acpi-info.rst-182-    an optional ACPI object that returns the 64-bit memory mapped
 Documentation/PCI/acpi-info.rst:183:    configuration base address for the hot plug capable host bridge. The
 Documentation/PCI/acpi-info.rst-184-    base address returned by _CBA is processor-relative address. The _CBA
 --
 Documentation/PCI/endpoint/pci-endpoint.rst=16=advanced error reporting and virtual channels.
 Documentation/PCI/endpoint/pci-endpoint.rst-17-
 Documentation/PCI/endpoint/pci-endpoint.rst:18:However the PCI controller IP integrated in some SoCs is capable of operating
 Documentation/PCI/endpoint/pci-endpoint.rst-19-either in Root Complex mode or Endpoint mode. PCI Endpoint Framework will
 --
 Documentation/PCI/endpoint/pci-test-howto.rst=219=Testcase 16 (pci_ep_data_transfer.dma.COPY_TEST) will fail for most of the DMA
 Documentation/PCI/endpoint/pci-test-howto.rst:220:capable endpoint controllers due to the absence of the MEMCPY over DMA. For such
 Documentation/PCI/endpoint/pci-test-howto.rst-221-controllers, it is advisable to skip this testcase using this
 --
 Documentation/PCI/pci-error-recovery.rst=400=The platform will typically notify the system operator of the
 Documentation/PCI/pci-error-recovery.rst:401:permanent failure in some way.  If the device is hotplug-capable,
 Documentation/PCI/pci-error-recovery.rst-402-the operator will probably want to remove and replace the device.
 --
 Documentation/PCI/pci-error-recovery.rst=423=That is, the recovery API only requires that:
 --
 Documentation/PCI/pci-error-recovery.rst-436-   the error handling. It is expected that the platform "knows" which
 Documentation/PCI/pci-error-recovery.rst:437:   interrupts are routed to error-management capable slots and can deal
 Documentation/PCI/pci-error-recovery.rst-438-   with temporarily disabling that IRQ number during error processing (this
 --
 Documentation/PCI/pci.rst=287=Many 64-bit "PCI" devices (before PCI-X) and some PCI-X devices are
 Documentation/PCI/pci.rst:288:64-bit DMA capable for payload ("streaming") data but not control
 Documentation/PCI/pci.rst-289-("coherent") data.
 --
 Documentation/PCI/pci.rst=503=Don't try to turn on Fast Back to Back writes in your driver.  All devices
 Documentation/PCI/pci.rst:504:on the bus need to be capable of doing it, so this is something which needs
 Documentation/PCI/pci.rst-505-to be handled by platform and generic code, not individual drivers.
 --
 Documentation/RCU/Design/Data-Structures/Data-Structures.rst=993=However, it turns out that when running in non-idle kernel context, the
 Documentation/RCU/Design/Data-Structures/Data-Structures.rst:994:Linux kernel is fully capable of entering interrupt handlers that never
 Documentation/RCU/Design/Data-Structures/Data-Structures.rst-995-exit and perhaps also vice versa. Therefore, whenever the
 --
 Documentation/accel/qaic/aic100.rst=13=inference workloads. They are AI accelerators.
 Documentation/accel/qaic/aic100.rst-14-
 Documentation/accel/qaic/aic100.rst:15:The PCIe interface of AIC100 is capable of PCIe Gen4 speeds over eight lanes
 Documentation/accel/qaic/aic100.rst-16-(x8). An individual SoC on a card can have up to 16 NSPs for running workloads.
 --
 Documentation/accel/qaic/aic100.rst=19=Multiple AIC100 cards can be hosted in a single system to scale overall
 Documentation/accel/qaic/aic100.rst:20:performance. AIC100 cards are multi-user capable and able to execute workloads
 Documentation/accel/qaic/aic100.rst-21-from multiple users in a concurrent manner.
 --
 Documentation/admin-guide/LSM/ipe.rst=804=A:
 --
 Documentation/admin-guide/LSM/ipe.rst-812-   Loadpin and IPE differ fairly dramatically, as Loadpin only covers the IPE's
 Documentation/admin-guide/LSM/ipe.rst:813:   kernel read operations, whereas IPE is capable of controlling execution
 Documentation/admin-guide/LSM/ipe.rst-814-   on top of kernel read. The trust model is also different; Loadpin roots its
 --
 Documentation/admin-guide/RAS/main.rst=36=Improving RAS
 --
 Documentation/admin-guide/RAS/main.rst-38-
 Documentation/admin-guide/RAS/main.rst:39:In order to reduce systems downtime, a system should be capable of detecting
 Documentation/admin-guide/RAS/main.rst-40-hardware errors, and, when possible correcting them in runtime. It should
 --
 Documentation/admin-guide/device-mapper/dm-pcache.rst=27=Constructor
 --
 Documentation/admin-guide/device-mapper/dm-pcache.rst-34-=========================  ====================================================
 Documentation/admin-guide/device-mapper/dm-pcache.rst:35:``cache_dev``               Any DAX-capable block device (``/dev/pmem0``…).
 Documentation/admin-guide/device-mapper/dm-pcache.rst-36-                            All metadata *and* cached blocks are stored here.
 --
 Documentation/admin-guide/hw-vuln/cross-thread-rsb.rst=35=Problem
 --
 Documentation/admin-guide/hw-vuln/cross-thread-rsb.rst-37-
 Documentation/admin-guide/hw-vuln/cross-thread-rsb.rst:38:Affected SMT-capable processors support 1T and 2T modes of execution when SMT
 Documentation/admin-guide/hw-vuln/cross-thread-rsb.rst-39-is enabled. In 2T mode, both threads in a core are executing code. For the
 --
 Documentation/admin-guide/hw-vuln/processor_mmio_stale_data.rst=186=Same mitigation as MDS when processor is also affected by MDS/TAA, otherwise
 Documentation/admin-guide/hw-vuln/processor_mmio_stale_data.rst:187:execute VERW at VMENTER only for MMIO capable guests. On CPUs not affected by
 Documentation/admin-guide/hw-vuln/processor_mmio_stale_data.rst-188-MDS/TAA, guest without MMIO access cannot extract secrets using Processor MMIO
 --
 Documentation/admin-guide/kernel-parameters.txt=98=Kernel parameters
 --
 Documentation/admin-guide/kernel-parameters.txt-3533-
 Documentation/admin-guide/kernel-parameters.txt:3534:			* external: Mark port as external (hotplug-capable).
 Documentation/admin-guide/kernel-parameters.txt-3535-
 --
 Documentation/admin-guide/kernel-parameters.txt-7074-			(logical CPUs) to use per physical CPU on systems
 Documentation/admin-guide/kernel-parameters.txt:7075:			capable of symmetric multithreading (SMT). Will
 Documentation/admin-guide/kernel-parameters.txt-7076-			be capped to the actual hardware limit.
 --
 Documentation/admin-guide/kernel-parameters.txt-7562-			The system is woken from this state using a
 Documentation/admin-guide/kernel-parameters.txt:7563:			wakeup-capable RTC alarm.
 Documentation/admin-guide/kernel-parameters.txt-7564-
 --
 Documentation/admin-guide/ldm.rst=99=Booting
 --
 Documentation/admin-guide/ldm.rst-101-
 Documentation/admin-guide/ldm.rst:102:If you enable LDM support, then lilo is capable of booting from any of the
 Documentation/admin-guide/ldm.rst-103-discovered partitions.  However, grub does not understand the LDM partitioning
 --
 Documentation/admin-guide/media/cec.rst=106=but are not in this list, then drop me a note.
 Documentation/admin-guide/media/cec.rst-107-
 Documentation/admin-guide/media/cec.rst:108:To test: hook up your DP-to-HDMI adapter to a CEC capable device
 Documentation/admin-guide/media/cec.rst-109-(typically a TV), then run::
 --
 Documentation/admin-guide/media/faq.rst=21=Some very frequently asked questions about Linux Digital TV support
 --
 Documentation/admin-guide/media/faq.rst-96-
 Documentation/admin-guide/media/faq.rst:97:	Several media player applications are capable of tuning into
 Documentation/admin-guide/media/faq.rst-98-	digital TV channels, including Kaffeine, Vlc, mplayer and MythTV.
 --
 Documentation/admin-guide/media/fimc.rst=11=SoC Application Processors is an integrated camera host interface, color
 Documentation/admin-guide/media/fimc.rst:12:space converter, image resizer and rotator.  It's also capable of capturing
 Documentation/admin-guide/media/fimc.rst-13-data from LCD controller (FIMD) through the SoC internal writeback data
 --
 Documentation/admin-guide/media/imx.rst=23=memory. Various dedicated DMA channels exist for both video capture and
 Documentation/admin-guide/media/imx.rst:24:display paths. During transfer, the IDMAC is also capable of vertical
 Documentation/admin-guide/media/imx.rst-25-image flip, 8x8 block transfer (see IRT description), pixel component
 --
 Documentation/admin-guide/media/ipu3.rst=309=pixel buffer which are ready to readout by following blocks.
 --
 Documentation/admin-guide/media/ipu3.rst-312-
 Documentation/admin-guide/media/ipu3.rst:313:Bayer Down Scaler is capable of performing image scaling in Bayer domain, the
 Documentation/admin-guide/media/ipu3.rst-314-downscale factor can be configured from 1X to 1/4X in each axis with
 --
 Documentation/admin-guide/media/mali-c55.rst=17=are referred to as "Full resolution" and "Downscale", but the naming is historic
 Documentation/admin-guide/media/mali-c55.rst:18:and both pipes are capable of cropping/scaling operations. The full resolution
 Documentation/admin-guide/media/mali-c55.rst:19:pipe is also capable of outputting RAW data, bypassing much of the ISP's
 Documentation/admin-guide/media/mali-c55.rst-20-processing. The downscale pipe cannot output RAW data. An integrated test
 --
 Documentation/admin-guide/media/mali-c55.rst=155=single stream are available:
 --
 Documentation/admin-guide/media/mali-c55.rst-172-
 Documentation/admin-guide/media/mali-c55.rst:173:If the demosaiced route is active then the FR pipe is only capable of output
 Documentation/admin-guide/media/mali-c55.rst-174-in RGB/YUV formats. If the raw route is active then the output reflects the
 --
 Documentation/admin-guide/media/mali-c55.rst=293=Capturing RGB data from the source and processing it with the resizers
 --
 Documentation/admin-guide/media/mali-c55.rst-295-
 Documentation/admin-guide/media/mali-c55.rst:296:The Mali-C55 ISP can work with sensors capable of outputting RGB data. In this
 Documentation/admin-guide/media/mali-c55.rst-297-case although none of the image quality blocks would be used it can still
 --
 Documentation/admin-guide/media/mali-c55.rst=339=Capturing ISP Statistics
 --
 Documentation/admin-guide/media/mali-c55.rst-341-
 Documentation/admin-guide/media/mali-c55.rst:342:The ISP is capable of producing statistics for consumption by image processing
 Documentation/admin-guide/media/mali-c55.rst-343-algorithms running in userspace. These statistics can be captured by queueing
 --
 Documentation/admin-guide/media/mgb4.rst=11=This is a v4l2 device driver for the Digiteq Automotive FrameGrabber 4, a PCIe
 Documentation/admin-guide/media/mgb4.rst:12:card capable of capturing and generating FPD-Link III and GMSL2/3 video streams
 Documentation/admin-guide/media/mgb4.rst-13-as used in the automotive industry.
 --
 Documentation/admin-guide/media/si4713.rst=99=Here is a summary of them:
 --
 Documentation/admin-guide/media/si4713.rst-106-
 Documentation/admin-guide/media/si4713.rst:107:* The si4713 device is capable of applying audio compression to the
 Documentation/admin-guide/media/si4713.rst-108-  transmitted signal.
 --
 Documentation/admin-guide/media/vivid.rst=1293=questionable.
 Documentation/admin-guide/media/vivid.rst-1294-
 Documentation/admin-guide/media/vivid.rst:1295:This driver has support for an output overlay and is capable of:
 Documentation/admin-guide/media/vivid.rst-1296-
 --
 Documentation/admin-guide/perf-security.rst=158=To get kernel and user samples with a perf binary with just CAP_PERFMON.
 Documentation/admin-guide/perf-security.rst-159-
 Documentation/admin-guide/perf-security.rst:160:As a result, members of perf_users group are capable of conducting
 Documentation/admin-guide/perf-security.rst-161-performance monitoring and observability by using functionality of the
 --
 Documentation/admin-guide/perf-security.rst=307=Bibliography
 --
 Documentation/admin-guide/perf-security.rst-321-.. [12] `<http://man7.org/linux/man-pages/man5/limits.conf.5.html>`_
 Documentation/admin-guide/perf-security.rst:322:.. [13] `<https://sites.google.com/site/fullycapable>`_
 Documentation/admin-guide/perf-security.rst-323-.. [14] `<http://man7.org/linux/man-pages/man8/auditd.8.html>`_
 --
 Documentation/admin-guide/perf/xgene-pmu.rst=25=performance of a specific datapath. For example, agents of a L3 cache can be
 Documentation/admin-guide/perf/xgene-pmu.rst:26:a specific CPU or an I/O bridge. Each PMU has a set of 2 registers capable of
 Documentation/admin-guide/perf/xgene-pmu.rst-27-masking the agents from which the request come from. If the bit with
 --
 Documentation/admin-guide/pm/cpufreq.rst=15=The Concept of CPU Performance Scaling
 --
 Documentation/admin-guide/pm/cpufreq.rst-17-
 Documentation/admin-guide/pm/cpufreq.rst:18:The majority of modern processors are capable of operating in a number of
 Documentation/admin-guide/pm/cpufreq.rst-19-different clock frequency and voltage configurations, often referred to as
 --
 Documentation/admin-guide/pm/cpufreq.rst=410=should be changed for a given policy (that depends on whether or not the driver
 Documentation/admin-guide/pm/cpufreq.rst:411:is capable of changing the CPU frequency from scheduler context).
 Documentation/admin-guide/pm/cpufreq.rst-412-
 --
 Documentation/admin-guide/pm/cpufreq_drivers.rst=13=AMD PowerNow! Drivers
 --
 Documentation/admin-guide/pm/cpufreq_drivers.rst-160- Each PCC command is "global" in scope and can affect all the logical CPUs in
 Documentation/admin-guide/pm/cpufreq_drivers.rst:161: the system. Therefore, PCC is capable of performing "group" updates. With PCC
 Documentation/admin-guide/pm/cpufreq_drivers.rst:162: the OS is capable of getting/setting the frequency of all the logical CPUs in
 Documentation/admin-guide/pm/cpufreq_drivers.rst-163- the system with a single call to the BIOS.
 --
 Documentation/admin-guide/serial-console.rst=75=defined ``tty1`` as the login console.
 Documentation/admin-guide/serial-console.rst-76-
 Documentation/admin-guide/serial-console.rst:77:If no console device is specified, the first device found capable of
 Documentation/admin-guide/serial-console.rst-78-acting as a system console will be used. At this time, the system
 --
 Documentation/admin-guide/sysctl/kernel.rst=1300=By default Linux is tuned for performance. Which means that RT tasks always run
 Documentation/admin-guide/sysctl/kernel.rst:1301:at the highest frequency and most capable (highest capacity) CPU (in
 Documentation/admin-guide/sysctl/kernel.rst-1302-heterogeneous systems).
 --
 Documentation/admin-guide/tainted-kernels.rst=110=More detailed explanation for tainting
 --
 Documentation/admin-guide/tainted-kernels.rst-127-       which do not report PAE but may have a functional implementation, an SMP
 Documentation/admin-guide/tainted-kernels.rst:128:       kernel is running on non officially capable SMP Athlon CPUs, MSRs are
 Documentation/admin-guide/tainted-kernels.rst-129-       being poked at from userspace.
 --
 Documentation/admin-guide/thunderbolt.rst=11=Typically PCs come with a firmware connection manager for Thunderbolt 3
 Documentation/admin-guide/thunderbolt.rst:12:and early USB4 capable systems. Apple systems on the other hand use
 Documentation/admin-guide/thunderbolt.rst-13-software connection manager and the later USB4 compliant devices follow
 --
 Documentation/arch/arm/arm.rst=8=Compilation of kernel
 --
 Documentation/arch/arm/arm.rst-10-
 Documentation/arch/arm/arm.rst:11:  In order to compile ARM Linux, you will need a compiler capable of
 Documentation/arch/arm/arm.rst-12-  generating ARM ELF code with GNU extensions.  GCC 3.3 is known to be
 --
 Documentation/arch/arm/booting.rst=184=In any case, the following conditions must be met:
 Documentation/arch/arm/booting.rst-185-
 Documentation/arch/arm/booting.rst:186:- Quiesce all DMA capable devices so that memory does not get
 Documentation/arch/arm/booting.rst-187-  corrupted by bogus network packets or disk data. This will save
 --
 Documentation/arch/arm/memory.rst=11=free for platforms to use, and which are used by generic code.
 Documentation/arch/arm/memory.rst-12-
 Documentation/arch/arm/memory.rst:13:The ARM CPU is capable of addressing a maximum of 4GB virtual memory
 Documentation/arch/arm/memory.rst-14-space, and this must be shared between user space processes, the
 --
 Documentation/arch/arm64/arm-acpi.rst=116=parameters passed from the boot loader (including kernel bootargs).
 Documentation/arch/arm64/arm-acpi.rst-117-
 Documentation/arch/arm64/arm-acpi.rst:118:Regardless of whether DT or ACPI is used, the kernel must always be capable
 Documentation/arch/arm64/arm-acpi.rst-119-of booting with either scheme (in kernels with both schemes enabled at compile
 --
 Documentation/arch/arm64/asymmetric-32bit.rst=15=Some Armv9 SoCs suffer from a big.LITTLE misfeature where only a subset
 Documentation/arch/arm64/asymmetric-32bit.rst:16:of the CPUs are capable of executing 32-bit user applications. On such
 Documentation/arch/arm64/asymmetric-32bit.rst-17-a system, Linux by default treats the asymmetry as a "mismatch" and
 --
 Documentation/arch/arm64/asymmetric-32bit.rst=53=sysfs
 --
 Documentation/arch/arm64/asymmetric-32bit.rst-55-
 Documentation/arch/arm64/asymmetric-32bit.rst:56:The subset of CPUs capable of running 32-bit tasks is described in
 Documentation/arch/arm64/asymmetric-32bit.rst-57-``/sys/devices/system/cpu/aarch32_el0`` and is documented further in
 Documentation/arch/arm64/asymmetric-32bit.rst=58=Documentation/ABI/testing/sysfs-devices-system-cpu.
 --
 Documentation/arch/arm64/asymmetric-32bit.rst-60-**Note:** CPUs are advertised by this file as they are detected and so
 Documentation/arch/arm64/asymmetric-32bit.rst:61:late-onlining of 32-bit-capable CPUs can result in the file contents
 Documentation/arch/arm64/asymmetric-32bit.rst-62-being modified by the kernel at runtime. Once advertised, CPUs are never
]
]

gemini-3-flash-preview

							input: 89041
							output: 38
							thoughts: 100
						

**Refining My Search Strategy**

Okay, I'm still wading through an excessive number of hits. Time to narrow my focus. I'm going to leverage `codesearch-definition-source` to re-examine `net/wireless/nl80211.c`, specifically the `nl80211_pre_doit` and `nl80211_small_ops` functions. This should give me a more concentrated view of the relevant areas.

Hold on, instead of getting bogged down in those, I can directly search for `ns_capable` within `net/wireless/nl80211.c`. That should cut to the chase and likely pinpoint the relevant usage and context more efficiently. This should be much more targeted.

map[Expression:ns_capable|capable\( PathPrefix:net/wireless/nl80211.c]

map[Output:
Full output is too long, showing 500 out of 12877 lines.
Use more precise expression if possible.

[Documentation/driver-api/pm/devices.rst=143=sleep state).  These fields are initialized by bus or device driver code using
 Documentation/driver-api/pm/devices.rst:144::c:func:`device_set_wakeup_capable()` and :c:func:`device_set_wakeup_enable()`,
 Documentation/driver-api/pm/devices.rst-145-defined in :file:`include/linux/pm_wakeup.h`.
 --
 Documentation/driver-api/pm/devices.rst=148=driver) can physically support wakeup events.  The
 Documentation/driver-api/pm/devices.rst:149::c:func:`device_set_wakeup_capable()` routine affects this flag.  The
 Documentation/driver-api/pm/devices.rst-150-:c:member:`power.wakeup` field is a pointer to an object of type
 --
 Documentation/driver-api/pm/devices.rst=154=devices (i.e. devices whose :c:member:`can_wakeup` flags are set) and is created
 Documentation/driver-api/pm/devices.rst:155:(or removed) by :c:func:`device_set_wakeup_capable()`.
 Documentation/driver-api/pm/devices.rst-156-
 --
 Documentation/driver-api/pm/devices.rst=163=to signal system wakeup.  This file is only present if the
 Documentation/driver-api/pm/devices.rst-164-:c:member:`power.wakeup` object exists for the given device and is created (or
 Documentation/driver-api/pm/devices.rst:165:removed) along with that object, by :c:func:`device_set_wakeup_capable()`.
 Documentation/driver-api/pm/devices.rst-166-Reads from the file will return the corresponding string.
 --
 Documentation/process/adding-syscalls.rst=155=it needs to be governed by the appropriate Linux capability bit (checked with
 Documentation/process/adding-syscalls.rst:156:a call to ``capable()``), as described in the :manpage:`capabilities(7)` man
 Documentation/process/adding-syscalls.rst-157-page.  Choose an existing capability bit that governs related functionality,
 --
 Documentation/translations/it_IT/process/adding-syscalls.rst=172=funzioni riservate, allora dev'essere gestita da un opportuno bit di privilegio
 Documentation/translations/it_IT/process/adding-syscalls.rst:173:(verificato con una chiamata a ``capable()``), come descritto nella pagina man
 Documentation/translations/it_IT/process/adding-syscalls.rst-174-:manpage:`capabilities(7)`.  Scegliete un bit di privilegio già esistente per
 --
 Documentation/translations/sp_SP/process/adding-syscalls.rst=176=funcionalidad privilegiada, esta necesita ser gobernada por la capability
 Documentation/translations/sp_SP/process/adding-syscalls.rst:177:bit linux apropiada (revisado con una llamada a ``capable()``), como se
 Documentation/translations/sp_SP/process/adding-syscalls.rst-178-describe en el man page :manpage:`capabilities(7)`. Elija una parte de
 --
 arch/arm/include/asm/vdso/gettimeofday.h=90=static __always_inline int clock_getres32_fallback(
 --
 arch/arm/include/asm/vdso/gettimeofday.h-107-
 arch/arm/include/asm/vdso/gettimeofday.h:108:static inline bool arm_vdso_hres_capable(void)
 arch/arm/include/asm/vdso/gettimeofday.h-109-{
 --
 arch/arm64/kernel/mte.c=524=static int access_remote_tags(struct task_struct *tsk, unsigned long addr,
 --
 arch/arm64/kernel/mte.c-535-	    ((get_dumpable(mm) != SUID_DUMP_USER) &&
 arch/arm64/kernel/mte.c:536:	     !ptracer_capable(tsk, mm->user_ns))) {
 arch/arm64/kernel/mte.c-537-		mmput(mm);
 --
 arch/arm64/net/bpf_jit_comp.c=990=static void __maybe_unused build_bhb_mitigation(struct jit_ctx *ctx)
 --
 arch/arm64/net/bpf_jit_comp.c-999-
 arch/arm64/net/bpf_jit_comp.c:1000:	if (ns_capable_noaudit(&init_user_ns, CAP_SYS_ADMIN))
 arch/arm64/net/bpf_jit_comp.c-1001-		return;
 --
 arch/loongarch/include/asm/vdso/gettimeofday.h=76=static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,
 --
 arch/loongarch/include/asm/vdso/gettimeofday.h-87-
 arch/loongarch/include/asm/vdso/gettimeofday.h:88:static inline bool loongarch_vdso_hres_capable(void)
 arch/loongarch/include/asm/vdso/gettimeofday.h-89-{
 --
 arch/loongarch/kvm/mmu.c-15-
 arch/loongarch/kvm/mmu.c:16:static inline bool kvm_hugepage_capable(struct kvm_memory_slot *slot)
 arch/loongarch/kvm/mmu.c-17-{
 --
 arch/loongarch/kvm/mmu.c-20-
 arch/loongarch/kvm/mmu.c:21:static inline bool kvm_hugepage_incapable(struct kvm_memory_slot *slot)
 arch/loongarch/kvm/mmu.c-22-{
 --
 arch/loongarch/kvm/mmu.c=608=static bool fault_supports_huge_mapping(struct kvm_memory_slot *memslot,
 --
 arch/loongarch/kvm/mmu.c-616-
 arch/loongarch/kvm/mmu.c:617:	if (kvm_hugepage_capable(memslot))
 arch/loongarch/kvm/mmu.c-618-		return true;
 arch/loongarch/kvm/mmu.c-619-
 arch/loongarch/kvm/mmu.c:620:	if (kvm_hugepage_incapable(memslot))
 arch/loongarch/kvm/mmu.c-621-		return false;
 --
 arch/m68k/bvme6000/rtc.c=39=static long rtc_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 --
 arch/m68k/bvme6000/rtc.c-76-
 arch/m68k/bvme6000/rtc.c:77:		if (!capable(CAP_SYS_ADMIN))
 arch/m68k/bvme6000/rtc.c-78-			return -EACCES;
 --
 arch/m68k/kernel/sys_m68k.c=378=sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
 --
 arch/m68k/kernel/sys_m68k.c-388-		ret = -EPERM;
 arch/m68k/kernel/sys_m68k.c:389:		if (!capable(CAP_SYS_ADMIN))
 arch/m68k/kernel/sys_m68k.c-390-			goto out;
 --
 arch/m68k/kernel/time.c=107=static int rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
 --
 arch/m68k/kernel/time.c-120-			return -EINVAL;
 arch/m68k/kernel/time.c:121:		if (!capable(CAP_SYS_TIME))
 arch/m68k/kernel/time.c-122-			return -EACCES;
 --
 arch/mips/include/asm/vdso/gettimeofday.h=186=static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,
 --
 arch/mips/include/asm/vdso/gettimeofday.h-204-
 arch/mips/include/asm/vdso/gettimeofday.h:205:static inline bool mips_vdso_hres_capable(void)
 arch/mips/include/asm/vdso/gettimeofday.h-206-{
 --
 arch/mips/kernel/mips-mt-fpaff.c=66=asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
 --
 arch/mips/kernel/mips-mt-fpaff.c-105-	}
 arch/mips/kernel/mips-mt-fpaff.c:106:	if (!check_same_owner(p) && !capable(CAP_SYS_NICE)) {
 arch/mips/kernel/mips-mt-fpaff.c-107-		retval = -EPERM;
 --
 arch/parisc/kernel/perf.c=288=static ssize_t perf_write(struct file *file, const char __user *buf,
 --
 arch/parisc/kernel/perf.c-302-
 arch/parisc/kernel/perf.c:303:	if (!perfmon_capable())
 arch/parisc/kernel/perf.c-304-		return -EACCES;
 --
 arch/powerpc/kernel/dexcr.c=78=int set_dexcr_prctl(struct task_struct *task, unsigned long which, unsigned long ctrl)
 --
 arch/powerpc/kernel/dexcr.c-105-	    ctrl & PR_PPC_DEXCR_CTRL_CLEAR_ONEXEC &&
 arch/powerpc/kernel/dexcr.c:106:	    !capable(CAP_SYS_ADMIN))
 arch/powerpc/kernel/dexcr.c-107-		return -EPERM;
 --
 arch/powerpc/kernel/iommu.c=1214=static struct iommu_domain spapr_tce_blocked_domain = {
 --
 arch/powerpc/kernel/iommu.c-1218-
 arch/powerpc/kernel/iommu.c:1219:static bool spapr_tce_iommu_capable(struct device *dev, enum iommu_cap cap)
 arch/powerpc/kernel/iommu.c-1220-{
 --
 arch/powerpc/kernel/rtas.c=1850=SYSCALL_DEFINE1(rtas, struct rtas_args __user *, uargs)
 --
 arch/powerpc/kernel/rtas.c-1858-
 arch/powerpc/kernel/rtas.c:1859:	if (!capable(CAP_SYS_ADMIN))
 arch/powerpc/kernel/rtas.c-1860-		return -EPERM;
 --
 arch/powerpc/perf/imc-pmu.c=980=static int thread_imc_event_init(struct perf_event *event)
 --
 arch/powerpc/perf/imc-pmu.c-988-
 arch/powerpc/perf/imc-pmu.c:989:	if (!perfmon_capable())
 arch/powerpc/perf/imc-pmu.c-990-		return -EACCES;
 --
 arch/powerpc/perf/imc-pmu.c=1437=static int trace_imc_event_init(struct perf_event *event)
 --
 arch/powerpc/perf/imc-pmu.c-1441-
 arch/powerpc/perf/imc-pmu.c:1442:	if (!perfmon_capable())
 arch/powerpc/perf/imc-pmu.c-1443-		return -EACCES;
 --
 arch/powerpc/perf/vpa-dtl.c=350=static int vpa_dtl_event_init(struct perf_event *event)
 --
 arch/powerpc/perf/vpa-dtl.c-357-
 arch/powerpc/perf/vpa-dtl.c:358:	if (!perfmon_capable())
 arch/powerpc/perf/vpa-dtl.c-359-		return -EACCES;
 --
 arch/powerpc/platforms/cell/spufs/inode.c=378=spufs_create_context(struct inode *inode, struct dentry *dentry,
 --
 arch/powerpc/platforms/cell/spufs/inode.c-388-	if ((flags & SPU_CREATE_NOSCHED) &&
 arch/powerpc/platforms/cell/spufs/inode.c:389:	    !capable(CAP_SYS_NICE))
 arch/powerpc/platforms/cell/spufs/inode.c-390-		return -EPERM;
 --
 arch/powerpc/platforms/pseries/cmm.c=349=static ssize_t store_oom_pages(struct device *dev,
 --
 arch/powerpc/platforms/pseries/cmm.c-354-
 arch/powerpc/platforms/pseries/cmm.c:355:	if (!capable(CAP_SYS_ADMIN))
 arch/powerpc/platforms/pseries/cmm.c-356-		return -EPERM;
 --
 arch/powerpc/platforms/pseries/suspend.c=75=static ssize_t store_hibernate(struct device *dev,
 --
 arch/powerpc/platforms/pseries/suspend.c-81-
 arch/powerpc/platforms/pseries/suspend.c:82:	if (!capable(CAP_SYS_ADMIN))
 arch/powerpc/platforms/pseries/suspend.c-83-		return -EPERM;
 --
 arch/powerpc/platforms/pseries/svm.c=19=static int __init init_svm(void)
 --
 arch/powerpc/platforms/pseries/svm.c-28-	 * Since the guest memory is inaccessible to the host, devices always
 arch/powerpc/platforms/pseries/svm.c:29:	 * need to use the SWIOTLB buffer for DMA even if dma_capable() says
 arch/powerpc/platforms/pseries/svm.c-30-	 * otherwise.
 --
 arch/s390/boot/uv.c=58=unsigned long adjust_to_uv_max(unsigned long limit)
 --
 arch/s390/boot/uv.c-64-
 arch/s390/boot/uv.c:65:static int is_prot_virt_host_capable(void)
 arch/s390/boot/uv.c-66-{
 --
 arch/s390/boot/uv.c=85=void sanitize_prot_virt_host(void)
 arch/s390/boot/uv.c-86-{
 arch/s390/boot/uv.c:87:	prot_virt_host = is_prot_virt_host_capable();
 arch/s390/boot/uv.c-88-}
 --
 arch/s390/hypfs/hypfs_sprp.c=111=static long hypfs_sprp_ioctl(struct file *file, unsigned int cmd,
 --
 arch/s390/hypfs/hypfs_sprp.c-115-
 arch/s390/hypfs/hypfs_sprp.c:116:	if (!capable(CAP_SYS_ADMIN))
 arch/s390/hypfs/hypfs_sprp.c-117-		return -EACCES;
 --
 arch/s390/include/asm/topology.h=27=extern struct cpu_topology_s390 cpu_topology[NR_CPUS];
 --
 arch/s390/include/asm/topology.h-40-
 arch/s390/include/asm/topology.h:41:#define mc_capable() 1
 arch/s390/include/asm/topology.h-42-
 --
 arch/s390/kernel/perf_cpum_cf.c=1408=static int cfset_open(struct inode *inode, struct file *file)
 --
 arch/s390/kernel/perf_cpum_cf.c-1411-
 arch/s390/kernel/perf_cpum_cf.c:1412:	if (!perfmon_capable())
 arch/s390/kernel/perf_cpum_cf.c-1413-		return -EPERM;
 --
 arch/s390/kvm/kvm-s390.c=3170=int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 --
 arch/s390/kvm/kvm-s390.c-3181-		goto out_err;
 arch/s390/kvm/kvm-s390.c:3182:	if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN)))
 arch/s390/kvm/kvm-s390.c-3183-		goto out_err;
 --
 arch/sh/drivers/pci/common.c=47=EARLY_PCI_OP(write, dword, u32)
 arch/sh/drivers/pci/common.c-48-
 arch/sh/drivers/pci/common.c:49:int __init pci_is_66mhz_capable(struct pci_channel *hose,
 arch/sh/drivers/pci/common.c-50-				int top_bus, int current_bus)
 --
 arch/sh/drivers/pci/pci-sh7780.c=221=static void __init sh7780_pci66_init(struct pci_channel *hose)
 --
 arch/sh/drivers/pci/pci-sh7780.c-224-
 arch/sh/drivers/pci/pci-sh7780.c:225:	if (!pci_is_66mhz_capable(hose, 0, 0))
 arch/sh/drivers/pci/pci-sh7780.c-226-		return;
 --
 arch/sh/include/asm/pci.h=58=extern unsigned int pcibios_handle_status_errors(unsigned long addr,
 arch/sh/include/asm/pci.h-59-				 unsigned int status, struct pci_channel *hose);
 arch/sh/include/asm/pci.h:60:extern int pci_is_66mhz_capable(struct pci_channel *hose,
 arch/sh/include/asm/pci.h-61-				int top_bus, int current_bus);
 --
 arch/sh/include/asm/topology.h-17-
 arch/sh/include/asm/topology.h:18:#define mc_capable()    (1)
 arch/sh/include/asm/topology.h-19-
 --
 arch/sparc/include/asm/adi_64.h=27=extern void mdesc_adi_init(void);
 arch/sparc/include/asm/adi_64.h-28-
 arch/sparc/include/asm/adi_64.h:29:static inline bool adi_capable(void)
 arch/sparc/include/asm/adi_64.h-30-{
 --
 arch/sparc/include/asm/mman.h=31=static inline vm_flags_t sparc_calc_vm_prot_bits(unsigned long prot)
 arch/sparc/include/asm/mman.h-32-{
 arch/sparc/include/asm/mman.h:33:	if (adi_capable() && (prot & PROT_ADI)) {
 arch/sparc/include/asm/mman.h-34-		struct pt_regs *regs;
 --
 arch/sparc/include/asm/mman.h=61=static inline bool arch_validate_flags(vm_flags_t vm_flags)
 --
 arch/sparc/include/asm/mman.h-67-	if (vm_flags & VM_SPARC_ADI) {
 arch/sparc/include/asm/mman.h:68:		if (!adi_capable())
 arch/sparc/include/asm/mman.h-69-			return false;
 --
 arch/sparc/include/asm/mmu_context_64.h=141=static inline void arch_start_context_switch(struct task_struct *prev)
 --
 arch/sparc/include/asm/mmu_context_64.h-145-	 */
 arch/sparc/include/asm/mmu_context_64.h:146:	if (adi_capable()) {
 arch/sparc/include/asm/mmu_context_64.h-147-		register unsigned long tmp_mcdper;
 --
 arch/sparc/include/asm/mmu_context_64.h=163=static inline void finish_arch_post_lock_switch(void)
 --
 arch/sparc/include/asm/mmu_context_64.h-167-	 */
 arch/sparc/include/asm/mmu_context_64.h:168:	if (adi_capable()) {
 arch/sparc/include/asm/mmu_context_64.h-169-		register unsigned long tmp_mcdper;
 --
 arch/sparc/include/asm/pgtable_64.h=1097=static inline unsigned long __untagged_addr(unsigned long start)
 arch/sparc/include/asm/pgtable_64.h-1098-{
 arch/sparc/include/asm/pgtable_64.h:1099:	if (adi_capable()) {
 arch/sparc/include/asm/pgtable_64.h-1100-		long addr = start;
 --
 arch/sparc/kernel/process_64.c=651=int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
 arch/sparc/kernel/process_64.c-652-{
 arch/sparc/kernel/process_64.c:653:	if (adi_capable()) {
 arch/sparc/kernel/process_64.c-654-		register unsigned long tmp_mcdper;
 --
 arch/sparc/mm/init_64.c=3157=void copy_highpage(struct page *to, struct page *from)
 --
 arch/sparc/mm/init_64.c-3169-	 */
 arch/sparc/mm/init_64.c:3170:	if (adi_capable()) {
 arch/sparc/mm/init_64.c-3171-		unsigned long pfrom, pto, i, adi_tag;
 --
 arch/um/drivers/virtio_uml.c=1208=static int virtio_uml_probe(struct platform_device *pdev)
 --
 arch/um/drivers/virtio_uml.c-1250-
 arch/um/drivers/virtio_uml.c:1251:	device_set_wakeup_capable(&vu_dev->vdev.dev, true);
 arch/um/drivers/virtio_uml.c-1252-
 --
 arch/x86/include/asm/resctrl.h=50=DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key);
 arch/x86/include/asm/resctrl.h-51-
 arch/x86/include/asm/resctrl.h:52:static inline bool resctrl_arch_alloc_capable(void)
 arch/x86/include/asm/resctrl.h-53-{
 --
 arch/x86/include/asm/resctrl.h=63=static inline void resctrl_arch_disable_alloc(void)
 --
 arch/x86/include/asm/resctrl.h-68-
 arch/x86/include/asm/resctrl.h:69:static inline bool resctrl_arch_mon_capable(void)
 arch/x86/include/asm/resctrl.h-70-{
 --
 arch/x86/kernel/amd_gart_64.c=183=need_iommu(struct device *dev, unsigned long addr, size_t size)
 arch/x86/kernel/amd_gart_64.c-184-{
 arch/x86/kernel/amd_gart_64.c:185:	return force_iommu || !dma_capable(dev, addr, size, true);
 arch/x86/kernel/amd_gart_64.c-186-}
 --
 arch/x86/kernel/amd_gart_64.c=189=nonforced_iommu(struct device *dev, unsigned long addr, size_t size)
 arch/x86/kernel/amd_gart_64.c-190-{
 arch/x86/kernel/amd_gart_64.c:191:	return !dma_capable(dev, addr, size, true);
 arch/x86/kernel/amd_gart_64.c-192-}
 --
 arch/x86/kernel/apm_32.c=1575=static int do_open(struct inode *inode, struct file *filp)
 --
 arch/x86/kernel/apm_32.c-1593-	 */
 arch/x86/kernel/apm_32.c:1594:	as->suser = capable(CAP_SYS_ADMIN);
 arch/x86/kernel/apm_32.c-1595-	as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
 --
 arch/x86/kernel/cpu/amd_cache_disable.c=148=static ssize_t store_cache_disable(struct cacheinfo *ci, const char *buf,
 --
 arch/x86/kernel/cpu/amd_cache_disable.c-154-
 arch/x86/kernel/cpu/amd_cache_disable.c:155:	if (!capable(CAP_SYS_ADMIN))
 arch/x86/kernel/cpu/amd_cache_disable.c-156-		return -EPERM;
 --
 arch/x86/kernel/cpu/amd_cache_disable.c=195=static ssize_t subcaches_store(struct device *dev,
 --
 arch/x86/kernel/cpu/amd_cache_disable.c-202-
 arch/x86/kernel/cpu/amd_cache_disable.c:203:	if (!capable(CAP_SYS_ADMIN))
 arch/x86/kernel/cpu/amd_cache_disable.c-204-		return -EPERM;
 --
 arch/x86/kernel/cpu/mce/dev-mcelog.c=254=static long mce_chrdev_ioctl(struct file *f, unsigned int cmd,
 --
 arch/x86/kernel/cpu/mce/dev-mcelog.c-258-
 arch/x86/kernel/cpu/mce/dev-mcelog.c:259:	if (!capable(CAP_SYS_ADMIN))
 arch/x86/kernel/cpu/mce/dev-mcelog.c-260-		return -EPERM;
 --
 arch/x86/kernel/cpu/mce/dev-mcelog.c=286=static ssize_t mce_chrdev_write(struct file *filp, const char __user *ubuf,
 --
 arch/x86/kernel/cpu/mce/dev-mcelog.c-290-
 arch/x86/kernel/cpu/mce/dev-mcelog.c:291:	if (!capable(CAP_SYS_ADMIN))
 arch/x86/kernel/cpu/mce/dev-mcelog.c-292-		return -EPERM;
 --
 arch/x86/kernel/cpu/mtrr/if.c=386=static int mtrr_open(struct inode *inode, struct file *file)
 --
 arch/x86/kernel/cpu/mtrr/if.c-391-		return -ENXIO;
 arch/x86/kernel/cpu/mtrr/if.c:392:	if (!capable(CAP_SYS_ADMIN))
 arch/x86/kernel/cpu/mtrr/if.c-393-		return -EPERM;
 --
 arch/x86/kernel/cpu/resctrl/core.c=286=static void rdt_get_cdp_config(int level)
 --
 arch/x86/kernel/cpu/resctrl/core.c-295-
 arch/x86/kernel/cpu/resctrl/core.c:296:static void rdt_set_io_alloc_capable(struct rdt_resource *r)
 arch/x86/kernel/cpu/resctrl/core.c-297-{
 --
 arch/x86/kernel/cpu/resctrl/core.c=924=static __init bool get_rdt_alloc_resources(void)
 --
 arch/x86/kernel/cpu/resctrl/core.c-940-		if (rdt_cpu_has(X86_FEATURE_SDCIAE))
 arch/x86/kernel/cpu/resctrl/core.c:941:			rdt_set_io_alloc_capable(r);
 arch/x86/kernel/cpu/resctrl/core.c-942-		ret = true;
 --
 arch/x86/kernel/hpet.c=127=__setup("nohpet", disable_hpet);
 arch/x86/kernel/hpet.c-128-
 arch/x86/kernel/hpet.c:129:static inline int is_hpet_capable(void)
 arch/x86/kernel/hpet.c-130-{
 --
 arch/x86/kernel/hpet.c=137=int is_hpet_enabled(void)
 arch/x86/kernel/hpet.c-138-{
 arch/x86/kernel/hpet.c:139:	return is_hpet_capable() && hpet_legacy_int_enabled;
 arch/x86/kernel/hpet.c-140-}
 --
 arch/x86/kernel/hpet.c=991=int __init hpet_enable(void)
 --
 arch/x86/kernel/hpet.c-997-
 arch/x86/kernel/hpet.c:998:	if (!is_hpet_capable())
 arch/x86/kernel/hpet.c-999-		return 0;
 --
 arch/x86/kernel/hpet.c=1160=void hpet_disable(void)
 --
 arch/x86/kernel/hpet.c-1164-
 arch/x86/kernel/hpet.c:1165:	if (!is_hpet_capable() || !hpet_virt_address)
 arch/x86/kernel/hpet.c-1166-		return;
 --
 arch/x86/kernel/ioport.c=71=long ksys_ioperm(unsigned long from, unsigned long num, int turn_on)
 --
 arch/x86/kernel/ioport.c-78-		return -EINVAL;
 arch/x86/kernel/ioport.c:79:	if (turn_on && (!capable(CAP_SYS_RAWIO) ||
 arch/x86/kernel/ioport.c-80-			security_locked_down(LOCKDOWN_IOPORT)))
 --
 arch/x86/kernel/ioport.c=179=SYSCALL_DEFINE1(iopl, unsigned int, level)
 --
 arch/x86/kernel/ioport.c-194-	if (level > old) {
 arch/x86/kernel/ioport.c:195:		if (!capable(CAP_SYS_RAWIO) ||
 arch/x86/kernel/ioport.c-196-		    security_locked_down(LOCKDOWN_IOPORT))
 --
 arch/x86/kernel/msr.c=206=static int msr_open(struct inode *inode, struct file *file)
 --
 arch/x86/kernel/msr.c-210-
 arch/x86/kernel/msr.c:211:	if (!capable(CAP_SYS_RAWIO))
 arch/x86/kernel/msr.c-212-		return -EPERM;
 --
 arch/x86/kernel/vm86_32.c=798=static int do_vm86_irq_handling(int subfunction, int irqnumber)
 --
 arch/x86/kernel/vm86_32.c-810-			int irq = irqnumber & 255;
 arch/x86/kernel/vm86_32.c:811:			if (!capable(CAP_SYS_ADMIN)) return -EPERM;
 arch/x86/kernel/vm86_32.c-812-			if (!((1 << sig) & ALLOWED_SIGS)) return -EPERM;
 --
 arch/x86/kvm/svm/sev.c=676=static struct page **sev_pin_memory(struct kvm *kvm, unsigned long uaddr,
 --
 arch/x86/kvm/svm/sev.c-699-	lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
 arch/x86/kvm/svm/sev.c:700:	if (locked > lock_limit && !capable(CAP_IPC_LOCK)) {
 arch/x86/kvm/svm/sev.c-701-		pr_err("SEV: %lu locked pages exceed the lock limit of %lu.\n", locked, lock_limit);
 --
 arch/x86/kvm/x86.c=6723=int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
 --
 arch/x86/kvm/x86.c-6943-		 * iTLB multihit bug to that container. In other words,
 arch/x86/kvm/x86.c:6944:		 * this must use capable(), not ns_capable().
 arch/x86/kvm/x86.c-6945-		 */
 arch/x86/kvm/x86.c:6946:		if (!capable(CAP_SYS_BOOT)) {
 arch/x86/kvm/x86.c-6947-			r = -EPERM;
 --
 arch/x86/mm/mmap.c=226=bool pfn_modify_allowed(unsigned long pfn, pgprot_t prot)
 --
 arch/x86/mm/mmap.c-234-		return true;
 arch/x86/mm/mmap.c:235:	if (pfn >= l1tf_pfn_limit() && !capable(CAP_SYS_ADMIN))
 arch/x86/mm/mmap.c-236-		return false;
 --
 arch/x86/net/bpf_jit_comp.c=2134=st:			if (is_imm8(insn->off))
 --
 arch/x86/net/bpf_jit_comp.c-2730-			if (bpf_prog_was_classic(bpf_prog) &&
 arch/x86/net/bpf_jit_comp.c:2731:			    !ns_capable_noaudit(&init_user_ns, CAP_SYS_ADMIN)) {
 arch/x86/net/bpf_jit_comp.c-2732-				u8 *ip = image + addrs[i - 1];
 --
 arch/x86/platform/intel/iosf_mbi.c=444=static int mcr_set(void *data, u64 val)
 --
 arch/x86/platform/intel/iosf_mbi.c-452-
 arch/x86/platform/intel/iosf_mbi.c:453:	if (!capable(CAP_SYS_RAWIO))
 arch/x86/platform/intel/iosf_mbi.c-454-		return -EACCES;
 --
 arch/x86/platform/olpc/olpc-xo1-sci.c=465=static int setup_ebook_switch(struct platform_device *pdev)
 --
 arch/x86/platform/olpc/olpc-xo1-sci.c-478-	ebook_switch_idev->dev.parent = &pdev->dev;
 arch/x86/platform/olpc/olpc-xo1-sci.c:479:	device_set_wakeup_capable(&ebook_switch_idev->dev, true);
 arch/x86/platform/olpc/olpc-xo1-sci.c-480-
 --
 arch/x86/platform/olpc/olpc-xo1-sci.c=495=static int setup_lid_switch(struct platform_device *pdev)
 --
 arch/x86/platform/olpc/olpc-xo1-sci.c-508-	lid_switch_idev->dev.parent = &pdev->dev;
 arch/x86/platform/olpc/olpc-xo1-sci.c:509:	device_set_wakeup_capable(&lid_switch_idev->dev, true);
 arch/x86/platform/olpc/olpc-xo1-sci.c-510-
 --
 block/bio-integrity-auto.c=48=static bool bip_should_check(struct bio_integrity_payload *bip)
 --
 block/bio-integrity-auto.c-52-
 block/bio-integrity-auto.c:53:static bool bi_offload_capable(struct blk_integrity *bi)
 block/bio-integrity-auto.c-54-{
 --
 block/bio-integrity-auto.c=95=bool bio_integrity_prep(struct bio *bio)
 --
 block/bio-integrity-auto.c-114-		if (bi->flags & BLK_INTEGRITY_NOVERIFY) {
 block/bio-integrity-auto.c:115:			if (bi_offload_capable(bi))
 block/bio-integrity-auto.c-116-				return true;
 --
 block/bio-integrity-auto.c-126-		if (bi->flags & BLK_INTEGRITY_NOGENERATE) {
 block/bio-integrity-auto.c:127:			if (bi_offload_capable(bi))
 block/bio-integrity-auto.c-128-				return true;
 --
 block/blk-ioc.c=244=int set_task_ioprio(struct task_struct *task, int ioprio)
 --
 block/blk-ioc.c-251-	if (!uid_eq(tcred->uid, cred->euid) &&
 block/blk-ioc.c:252:	    !uid_eq(tcred->uid, cred->uid) && !capable(CAP_SYS_NICE)) {
 block/blk-ioc.c-253-		rcu_read_unlock();
 --
 block/bsg-lib.c=28=static int bsg_transport_sg_io_fn(struct request_queue *q, struct sg_io_v4 *hdr,
 --
 block/bsg-lib.c-39-		return -EINVAL;
 block/bsg-lib.c:40:	if (!capable(CAP_SYS_RAWIO))
 block/bsg-lib.c-41-		return -EPERM;
 --
 block/ioctl.c=21=static int blkpg_do_ioctl(struct block_device *bdev,
 --
 block/ioctl.c-27-
 block/ioctl.c:28:	if (!capable(CAP_SYS_ADMIN))
 block/ioctl.c-29-		return -EACCES;
 --
 block/ioctl.c=326=static bool blkdev_pr_allowed(struct block_device *bdev, blk_mode_t mode,
 --
 block/ioctl.c-332-
 block/ioctl.c:333:	if (capable(CAP_SYS_ADMIN))
 block/ioctl.c-334-		return true;
 --
 block/ioctl.c=519=static int blkdev_flushbuf(struct block_device *bdev, unsigned cmd,
 --
 block/ioctl.c-521-{
 block/ioctl.c:522:	if (!capable(CAP_SYS_ADMIN))
 block/ioctl.c-523-		return -EACCES;
 --
 block/ioctl.c=537=static int blkdev_roset(struct block_device *bdev, unsigned cmd,
 --
 block/ioctl.c-541-
 block/ioctl.c:542:	if (!capable(CAP_SYS_ADMIN))
 block/ioctl.c-543-		return -EACCES;
 --
 block/ioctl.c=625=static int blkdev_bszset(struct file *file, blk_mode_t mode,
 --
 block/ioctl.c-633-
 block/ioctl.c:634:	if (!capable(CAP_SYS_ADMIN))
 block/ioctl.c-635-		return -EACCES;
 --
 block/ioctl.c=657=static int blkdev_common_ioctl(struct block_device *bdev, blk_mode_t mode,
 --
 block/ioctl.c-709-	case BLKFRASET:
 block/ioctl.c:710:		if(!capable(CAP_SYS_ADMIN))
 block/ioctl.c-711-			return -EACCES;
 --
 block/ioctl.c-714-	case BLKRRPART:
 block/ioctl.c:715:		if (!capable(CAP_SYS_ADMIN))
 block/ioctl.c-716-			return -EACCES;
 --
 block/ioprio.c=33=int ioprio_check_cap(int ioprio)
 --
]
]

gemini-3-flash-preview

							input: 100157
							output: 48
							thoughts: 283
						

**Debugging `grep` and the TDLS Management Function**

Okay, I'm still not quite grasping how to use `grep` effectively, which is frustrating. I was initially thinking I should re-examine the `nl80211_pre_doit` function using `codesearch-definition-source`, but I already did that and found nothing relevant there.

Wait, I should take a second look at `nl80211_tdls_mgmt`. Let me quickly pull up the code for that function. Okay, here it is:

```c
13691:	static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
13692:	{
...
13723:		return rdev_tdls_mgmt(rdev, dev, peer, link_id, action_code,
13724:				      dialog_token, status_code, peer_capability,
13725:				      initiator,
13726:				      nla_data(info->attrs[NL80211_ATTR_IE]),
13727:				      nla_len(info->attrs[NL80211_ATTR_IE]));
13728:	}
```

Now I need to investigate `rdev_tdls_mgmt`. That seems to be the critical function to examine. Let's see what that's doing.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:rdev_tdls_mgmt]

map[SourceCode: 921:	static inline int rdev_tdls_mgmt(struct cfg80211_registered_device *rdev,
 922:					 struct net_device *dev, u8 *peer,
 923:					 int link_id, u8 action_code,
 924:					 u8 dialog_token, u16 status_code,
 925:					 u32 peer_capability, bool initiator,
 926:					 const u8 *buf, size_t len)
 927:	{
 928:		int ret;
 929:		trace_rdev_tdls_mgmt(&rdev->wiphy, dev, peer, link_id, action_code,
 930:				     dialog_token, status_code, peer_capability,
 931:				     initiator, buf, len);
 932:		ret = rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, link_id,
 933:					   action_code, dialog_token, status_code,
 934:					   peer_capability, initiator, buf, len);
 935:		trace_rdev_return_int(&rdev->wiphy, ret);
 936:		return ret;
 937:	}
 SourceFile:net/wireless/rdev-ops.h]

gemini-3-flash-preview

							input: 101187
							output: 49
							thoughts: 1123
						

**Analyzing Generic Netlink Permissions for TDLS Management**

Okay, so I'm looking at this `NL80211_CMD_TDLS_MGMT` command and trying to figure out if unprivileged users can actually use it. It's essentially calling a driver operation, so the critical protection mechanism here is the `GENL_UNS_ADMIN_PERM` flag. Let's dig into how that's implemented.

From the code in `net/netlink/genetlink.c`, it's clear that if `GENL_UNS_ADMIN_PERM` is set, `netlink_ns_capable` is checked. This function, in turn, verifies if the sender has `CAP_NET_ADMIN` within the network namespace's user namespace. Makes sense.

If an unprivileged user is within the initial root user namespace, they don't have `CAP_NET_ADMIN`. Since the initial network namespace's `net->user_ns` is also `&init_user_ns`, this command is denied.  They can't access `NL80211_CMD_TDLS_MGMT`.

However, the interesting part is if they create a new user namespace and a new network namespace. In that case, they *do* have `CAP_NET_ADMIN` in their newly created user namespace.  The `net->user_ns` within their newly created network namespace would then point to *their* user namespace. So, `netlink_ns_capable` returns true, and they *can* execute `NL80211_CMD_TDLS_MGMT`.

But here's the catch: the devices they can operate on are *only* those present in their new network namespace. Wireless devices are usually in the initial network namespace.  To move a wireless device to a new network namespace, you'd use `NL80211_CMD_SET_WIPHY_NETNS`. Ah, but that command *also* requires `GENL_UNS_ADMIN_PERM`. So to move a device *from* the initial namespace, they would need to be able to issue that command from within the initial namespace, which they can't because they don't have the appropriate privilege. They would require `CAP_NET_ADMIN` within the initial user namespace. So that won't work.

But wait, what about wireless devices within the new namespace? It looks like those either get created there (e.g., `mac80211_hwsim`), or are moved there with privilege from the parent namespace.

So, the summary is clear: unprivileged users can't use `NL80211_CMD_TDLS_MGMT` in the initial network namespace, but they *can* if they're in a network namespace where they have `CAP_NET_ADMIN`. They can only use it on devices already present in that namespace.

And the follow-up question, "Does it mean it requires CAP_NET_ADMIN in the user namespace?" is absolutely correct. It needs `CAP_NET_ADMIN` in the user namespace that owns the network namespace.

Let me check for other flags. `GENL_ADMIN_PERM` is another one. And that actually requires `CAP_NET_ADMIN` in the *initial* user namespace, which is more restrictive. This is done via `netlink_capable`.  Since `NL80211_CMD_TDLS_MGMT` uses `GENL_UNS_ADMIN_PERM`, it's the less restrictive option.

Alright, now let's make sure I'm not missing anything. I should check if `nl80211` has any other global checks. I see that `nl80211_pre_doit` calls `cfg80211_get_dev_from_info` or `__cfg80211_wdev_from_attrs`. These would probably return an error if the user is not in the correct network namespace.

And I also need to make sure unprivileged users can even *open* the socket. Netlink sockets are accessible to everyone, and generic netlink families can be joined by anyone. That part isn't a problem. Let's make sure I didn't miss anything in `nl80211_init`. So, it doesn't look like there are any other global checks.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_init]

map[SourceCode:22028:	int __init nl80211_init(void)
22029:	{
22030:		int err;
22031:	
22032:		err = genl_register_family(&nl80211_fam);
22033:		if (err)
22034:			return err;
22035:	
22036:		err = netlink_register_notifier(&nl80211_netlink_notifier);
22037:		if (err)
22038:			goto err_out;
22039:	
22040:		return 0;
22041:	 err_out:
22042:		genl_unregister_family(&nl80211_fam);
22043:		return err;
22044:	}
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 103584
							output: 21
							thoughts: 69
						

Here's my take on this, considering I'm trying to distill these thoughts for someone already well-versed in the subject:

**Navigating Permissions and Generic Netlink**

Okay, nothing immediately striking comes to mind. Let's see... *aha*, `GENL_UNS_ADMIN_PERM`. That’s the crucial piece, isn't it?

Right, time to verify exactly what `GENL_UNS_ADMIN_PERM` represents. No need to reinvent the wheel, I should have a look at the authoritative source. I'll zero in on the relevant documentation. Something like `Documentation/networking/generic_netlink.rst` is the likely candidate. That's the go-to reference for these details.

map[Dir:Documentation/networking]

map[Files:<nil> Subdirs:[caif device_drivers devlink diagnostic dsa mac80211_hwsim net_cachelines pse-pd xfrm]]

gemini-3-flash-preview

							input: 103903
							output: 32
							thoughts: 22
						

Here's my attempt at summarizing the thought process, tailored for an expert audience:

**Missing Documentation - A Quick Search is Needed**

Okay, I'm taking a look through this directory structure, and I'm not immediately seeing `generic_netlink.rst`. That's a bit odd; I would have expected it to be present. Therefore, my next immediate action is to initiate a search. Given the typical naming conventions and the relative maturity of the Netlink documentation, I'll start with a straightforward search for the filename. Hopefully, the file is simply misplaced or named slightly differently than anticipated, and a quick find will resolve the issue. If not, I'll need to broaden the search parameters, perhaps checking for related files or documentation pertaining to Netlink concepts more broadly.

map[Expression:GENL_UNS_ADMIN_PERM PathPrefix:Documentation/]

map[Output:
Full output is too long, showing 500 out of 759 lines.
Use more precise expression if possible.

[drivers/net/ieee802154/mac802154_hwsim.c=751=static const struct genl_small_ops hwsim_nl_ops[] = {
 --
 drivers/net/ieee802154/mac802154_hwsim.c-755-		.doit = hwsim_new_radio_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:756:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-757-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-761-		.doit = hwsim_del_radio_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:762:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-763-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-773-		.doit = hwsim_new_edge_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:774:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-775-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-779-		.doit = hwsim_del_edge_nl,
 drivers/net/ieee802154/mac802154_hwsim.c:780:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-781-	},
 --
 drivers/net/ieee802154/mac802154_hwsim.c-785-		.doit = hwsim_set_edge_lqi,
 drivers/net/ieee802154/mac802154_hwsim.c:786:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/ieee802154/mac802154_hwsim.c-787-	},
 --
 drivers/net/wireguard/generated/netlink.c=56=const struct genl_split_ops wireguard_nl_ops[2] = {
 --
 drivers/net/wireguard/generated/netlink.c-63-		.maxattr	= WGDEVICE_A_IFNAME,
 drivers/net/wireguard/generated/netlink.c:64:		.flags		= GENL_UNS_ADMIN_PERM | GENL_CMD_CAP_DUMP,
 drivers/net/wireguard/generated/netlink.c-65-	},
 --
 drivers/net/wireguard/generated/netlink.c-70-		.maxattr	= WGDEVICE_A_PEERS,
 drivers/net/wireguard/generated/netlink.c:71:		.flags		= GENL_UNS_ADMIN_PERM | GENL_CMD_CAP_DO,
 drivers/net/wireguard/generated/netlink.c-72-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c=6651=static const struct genl_small_ops hwsim_ops[] = {
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6655-		.doit = hwsim_register_received_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6656:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6657-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6671-		.doit = hwsim_new_radio_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6672:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6673-	},
 --
 drivers/net/wireless/virtual/mac80211_hwsim.c-6677-		.doit = hwsim_del_radio_nl,
 drivers/net/wireless/virtual/mac80211_hwsim.c:6678:		.flags = GENL_UNS_ADMIN_PERM,
 drivers/net/wireless/virtual/mac80211_hwsim.c-6679-	},
 --
 include/net/genetlink.h=173=enum genl_validate_flags {
 --
 include/net/genetlink.h-182- * @internal_flags: flags used by the family
 include/net/genetlink.h:183: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-184- * @validate: validation flags from enum genl_validate_flags
 --
 include/net/genetlink.h=191=struct genl_small_ops {
 --
 include/net/genetlink.h-203- * @internal_flags: flags used by the family
 include/net/genetlink.h:204: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-205- * @maxattr: maximum number of attributes supported
 --
 include/net/genetlink.h=213=struct genl_ops {
 --
 include/net/genetlink.h-231- * @internal_flags: flags used by the family
 include/net/genetlink.h:232: * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 include/net/genetlink.h-233- * @validate: validation flags from enum genl_validate_flags
 --
 include/uapi/linux/genetlink.h=13=struct genlmsghdr {
 --
 include/uapi/linux/genetlink.h-24-#define GENL_CMD_CAP_HASPOL	0x08
 include/uapi/linux/genetlink.h:25:#define GENL_UNS_ADMIN_PERM	0x10
 include/uapi/linux/genetlink.h-26-
 --
 net/batman-adv/netlink.c=1400=static const struct genl_small_ops batadv_netlink_ops[] = {
 --
 net/batman-adv/netlink.c-1410-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1411:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1412-		.doit = batadv_netlink_tp_meter_start,
 --
 net/batman-adv/netlink.c-1417-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1418:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1419-		.doit = batadv_netlink_tp_meter_cancel,
 --
 net/batman-adv/netlink.c-1424-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1425:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1426-		.dumpit = batadv_algo_dump,
 --
 net/batman-adv/netlink.c-1439-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1440:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1441-		.dumpit = batadv_tt_local_dump,
 --
 net/batman-adv/netlink.c-1445-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1446:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1447-		.dumpit = batadv_tt_global_dump,
 --
 net/batman-adv/netlink.c-1451-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1452:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1453-		.dumpit = batadv_orig_dump,
 --
 net/batman-adv/netlink.c-1457-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1458:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1459-		.dumpit = batadv_hardif_neigh_dump,
 --
 net/batman-adv/netlink.c-1463-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1464:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1465-		.dumpit = batadv_gw_dump,
 --
 net/batman-adv/netlink.c-1469-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1470:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1471-		.dumpit = batadv_bla_claim_dump,
 --
 net/batman-adv/netlink.c-1475-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1476:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1477-		.dumpit = batadv_bla_backbone_dump,
 --
 net/batman-adv/netlink.c-1481-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1482:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1483-		.dumpit = batadv_dat_cache_dump,
 --
 net/batman-adv/netlink.c-1487-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1488:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1489-		.dumpit = batadv_mcast_flags_dump,
 --
 net/batman-adv/netlink.c-1493-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1494:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1495-		.doit = batadv_netlink_set_mesh,
 --
 net/batman-adv/netlink.c-1500-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1501:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1502-		.doit = batadv_netlink_set_hardif,
 --
 net/batman-adv/netlink.c-1516-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/batman-adv/netlink.c:1517:		.flags = GENL_UNS_ADMIN_PERM,
 net/batman-adv/netlink.c-1518-		.doit = batadv_netlink_set_vlan,
 --
 net/ethtool/netlink.c=1133=static const struct genl_ops ethtool_genl_ops[] = {
 --
 net/ethtool/netlink.c-1153-		.cmd	= ETHTOOL_MSG_LINKINFO_SET,
 net/ethtool/netlink.c:1154:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1155-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1169-		.cmd	= ETHTOOL_MSG_LINKMODES_SET,
 net/ethtool/netlink.c:1170:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1171-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1194-		.cmd	= ETHTOOL_MSG_DEBUG_SET,
 net/ethtool/netlink.c:1195:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1196-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1201-		.cmd	= ETHTOOL_MSG_WOL_GET,
 net/ethtool/netlink.c:1202:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1203-		.doit	= ethnl_default_doit,
 --
 net/ethtool/netlink.c-1211-		.cmd	= ETHTOOL_MSG_WOL_SET,
 net/ethtool/netlink.c:1212:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1213-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1227-		.cmd	= ETHTOOL_MSG_FEATURES_SET,
 net/ethtool/netlink.c:1228:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1229-		.doit	= ethnl_set_features,
 --
 net/ethtool/netlink.c-1243-		.cmd	= ETHTOOL_MSG_PRIVFLAGS_SET,
 net/ethtool/netlink.c:1244:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1245-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1259-		.cmd	= ETHTOOL_MSG_RINGS_SET,
 net/ethtool/netlink.c:1260:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1261-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1275-		.cmd	= ETHTOOL_MSG_CHANNELS_SET,
 net/ethtool/netlink.c:1276:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1277-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1291-		.cmd	= ETHTOOL_MSG_COALESCE_SET,
 net/ethtool/netlink.c:1292:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1293-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1307-		.cmd	= ETHTOOL_MSG_PAUSE_SET,
 net/ethtool/netlink.c:1308:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1309-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1323-		.cmd	= ETHTOOL_MSG_EEE_SET,
 net/ethtool/netlink.c:1324:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1325-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1339-		.cmd	= ETHTOOL_MSG_CABLE_TEST_ACT,
 net/ethtool/netlink.c:1340:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1341-		.doit	= ethnl_act_cable_test,
 --
 net/ethtool/netlink.c-1346-		.cmd	= ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
 net/ethtool/netlink.c:1347:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1348-		.doit	= ethnl_act_cable_test_tdr,
 --
 net/ethtool/netlink.c-1370-		.cmd	= ETHTOOL_MSG_FEC_SET,
 net/ethtool/netlink.c:1371:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1372-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1377-		.cmd	= ETHTOOL_MSG_MODULE_EEPROM_GET,
 net/ethtool/netlink.c:1378:		.flags  = GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1379-		.doit	= ethnl_default_doit,
 --
 net/ethtool/netlink.c-1414-		.cmd	= ETHTOOL_MSG_MODULE_SET,
 net/ethtool/netlink.c:1415:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1416-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1430-		.cmd	= ETHTOOL_MSG_PSE_SET,
 net/ethtool/netlink.c:1431:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1432-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1454-		.cmd	= ETHTOOL_MSG_PLCA_SET_CFG,
 net/ethtool/netlink.c:1455:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1456-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1479-		.cmd	= ETHTOOL_MSG_MM_SET,
 net/ethtool/netlink.c:1480:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1481-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1486-		.cmd	= ETHTOOL_MSG_MODULE_FW_FLASH_ACT,
 net/ethtool/netlink.c:1487:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1488-		.doit	= ethnl_act_module_fw_flash,
 --
 net/ethtool/netlink.c-1511-		.cmd	= ETHTOOL_MSG_TSCONFIG_SET,
 net/ethtool/netlink.c:1512:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1513-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1518-		.cmd	= ETHTOOL_MSG_RSS_SET,
 net/ethtool/netlink.c:1519:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1520-		.doit	= ethnl_default_set_doit,
 --
 net/ethtool/netlink.c-1525-		.cmd	= ETHTOOL_MSG_RSS_CREATE_ACT,
 net/ethtool/netlink.c:1526:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1527-		.doit	= ethnl_rss_create_doit,
 --
 net/ethtool/netlink.c-1532-		.cmd	= ETHTOOL_MSG_RSS_DELETE_ACT,
 net/ethtool/netlink.c:1533:		.flags	= GENL_UNS_ADMIN_PERM,
 net/ethtool/netlink.c-1534-		.doit	= ethnl_rss_delete_doit,
 --
 net/l2tp/l2tp_netlink.c=935=static const struct genl_small_ops l2tp_nl_ops[] = {
 --
 net/l2tp/l2tp_netlink.c-945-		.doit = l2tp_nl_cmd_tunnel_create,
 net/l2tp/l2tp_netlink.c:946:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-947-	},
 --
 net/l2tp/l2tp_netlink.c-951-		.doit = l2tp_nl_cmd_tunnel_delete,
 net/l2tp/l2tp_netlink.c:952:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-953-	},
 --
 net/l2tp/l2tp_netlink.c-957-		.doit = l2tp_nl_cmd_tunnel_modify,
 net/l2tp/l2tp_netlink.c:958:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-959-	},
 --
 net/l2tp/l2tp_netlink.c-964-		.dumpit = l2tp_nl_cmd_tunnel_dump,
 net/l2tp/l2tp_netlink.c:965:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-966-	},
 --
 net/l2tp/l2tp_netlink.c-970-		.doit = l2tp_nl_cmd_session_create,
 net/l2tp/l2tp_netlink.c:971:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-972-	},
 --
 net/l2tp/l2tp_netlink.c-976-		.doit = l2tp_nl_cmd_session_delete,
 net/l2tp/l2tp_netlink.c:977:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-978-	},
 --
 net/l2tp/l2tp_netlink.c-982-		.doit = l2tp_nl_cmd_session_modify,
 net/l2tp/l2tp_netlink.c:983:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-984-	},
 --
 net/l2tp/l2tp_netlink.c-989-		.dumpit = l2tp_nl_cmd_session_dump,
 net/l2tp/l2tp_netlink.c:990:		.flags = GENL_UNS_ADMIN_PERM,
 net/l2tp/l2tp_netlink.c-991-	},
 --
 net/mptcp/mptcp_pm_gen.c=92=const struct genl_ops mptcp_pm_nl_ops[11] = {
 --
 net/mptcp/mptcp_pm_gen.c-98-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:99:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-100-	},
 --
 net/mptcp/mptcp_pm_gen.c-106-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:107:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-108-	},
 --
 net/mptcp/mptcp_pm_gen.c-122-		.maxattr	= MPTCP_PM_ENDPOINT_ADDR,
 net/mptcp/mptcp_pm_gen.c:123:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-124-	},
 --
 net/mptcp/mptcp_pm_gen.c-130-		.maxattr	= MPTCP_PM_ATTR_SUBFLOWS,
 net/mptcp/mptcp_pm_gen.c:131:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-132-	},
 --
 net/mptcp/mptcp_pm_gen.c-145-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:146:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-147-	},
 --
 net/mptcp/mptcp_pm_gen.c-153-		.maxattr	= MPTCP_PM_ATTR_TOKEN,
 net/mptcp/mptcp_pm_gen.c:154:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-155-	},
 --
 net/mptcp/mptcp_pm_gen.c-161-		.maxattr	= MPTCP_PM_ATTR_LOC_ID,
 net/mptcp/mptcp_pm_gen.c:162:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-163-	},
 --
 net/mptcp/mptcp_pm_gen.c-169-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:170:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-171-	},
 --
 net/mptcp/mptcp_pm_gen.c-177-		.maxattr	= MPTCP_PM_ATTR_ADDR_REMOTE,
 net/mptcp/mptcp_pm_gen.c:178:		.flags		= GENL_UNS_ADMIN_PERM,
 net/mptcp/mptcp_pm_gen.c-179-	},
 --
 net/netlink/genetlink.c=1155=static int genl_family_rcv_msg(const struct genl_family *family,
 --
 net/netlink/genetlink.c-1185-
 net/netlink/genetlink.c:1186:	if ((op.flags & GENL_UNS_ADMIN_PERM) &&
 net/netlink/genetlink.c-1187-	    !netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN))
 --
 net/openvswitch/conntrack.c=1956=static const struct genl_small_ops ct_limit_genl_ops[] = {
 --
 net/openvswitch/conntrack.c-1958-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/conntrack.c:1959:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/conntrack.c-1960-					       * privilege.
 --
 net/openvswitch/conntrack.c-1965-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/conntrack.c:1966:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/conntrack.c-1967-					       * privilege.
 --
 net/openvswitch/datapath.c=730=static const struct genl_small_ops dp_packet_genl_ops[] = {
 --
 net/openvswitch/datapath.c-732-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:733:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-734-	  .doit = ovs_packet_cmd_execute
 --
 net/openvswitch/datapath.c=1539=static const struct genl_small_ops dp_flow_genl_ops[] = {
 --
 net/openvswitch/datapath.c-1541-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1542:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1543-	  .doit = ovs_flow_cmd_new
 --
 net/openvswitch/datapath.c-1546-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1547:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1548-	  .doit = ovs_flow_cmd_del
 --
 net/openvswitch/datapath.c-1557-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:1558:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-1559-	  .doit = ovs_flow_cmd_set,
 --
 net/openvswitch/datapath.c=2085=static const struct genl_small_ops dp_datapath_genl_ops[] = {
 --
 net/openvswitch/datapath.c-2087-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2088:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2089-	  .doit = ovs_dp_cmd_new
 --
 net/openvswitch/datapath.c-2092-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2093:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2094-	  .doit = ovs_dp_cmd_del
 --
 net/openvswitch/datapath.c-2103-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2104:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2105-	  .doit = ovs_dp_cmd_set,
 --
 net/openvswitch/datapath.c=2582=static const struct genl_small_ops dp_vport_genl_ops[] = {
 --
 net/openvswitch/datapath.c-2584-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2585:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2586-	  .doit = ovs_vport_cmd_new
 --
 net/openvswitch/datapath.c-2589-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2590:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2591-	  .doit = ovs_vport_cmd_del
 --
 net/openvswitch/datapath.c-2600-	  .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/datapath.c:2601:	  .flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN privilege. */
 net/openvswitch/datapath.c-2602-	  .doit = ovs_vport_cmd_set,
 --
 net/openvswitch/meter.c=682=static const struct genl_small_ops dp_meter_genl_ops[] = {
 --
 net/openvswitch/meter.c-689-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/meter.c:690:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/meter.c-691-					       *  privilege.
 --
 net/openvswitch/meter.c-701-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/openvswitch/meter.c:702:		.flags = GENL_UNS_ADMIN_PERM, /* Requires CAP_NET_ADMIN
 net/openvswitch/meter.c-703-					       *  privilege.
 --
 net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
 --
 net/wireless/nl80211.c-18313-		.doit = nl80211_set_wiphy,
 net/wireless/nl80211.c:18314:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18315-	},
 --
 net/wireless/nl80211.c-18327-		.doit = nl80211_set_interface,
 net/wireless/nl80211.c:18328:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18329-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
 --
 net/wireless/nl80211.c-18335-		.doit = nl80211_new_interface,
 net/wireless/nl80211.c:18336:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18337-		.internal_flags =
 --
 net/wireless/nl80211.c-18346-		.doit = nl80211_del_interface,
 net/wireless/nl80211.c:18347:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18348-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
 --
 net/wireless/nl80211.c-18354-		.doit = nl80211_get_key,
 net/wireless/nl80211.c:18355:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18356-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18361-		.doit = nl80211_set_key,
 net/wireless/nl80211.c:18362:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18363-		/* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on key */
 --
 net/wireless/nl80211.c-18370-		.doit = nl80211_new_key,
 net/wireless/nl80211.c:18371:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18372-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18378-		.doit = nl80211_del_key,
 net/wireless/nl80211.c:18379:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18380-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18384-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18385:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18386-		.doit = nl80211_set_beacon,
 --
 net/wireless/nl80211.c-18392-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18393:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18394-		.doit = nl80211_start_ap,
 --
 net/wireless/nl80211.c-18400-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 net/wireless/nl80211.c:18401:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18402-		.doit = nl80211_stop_ap,
 --
 net/wireless/nl80211.c-18416-		.doit = nl80211_set_station,
 net/wireless/nl80211.c:18417:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18418-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18423-		.doit = nl80211_new_station,
 net/wireless/nl80211.c:18424:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18425-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18430-		.doit = nl80211_del_station,
 net/wireless/nl80211.c:18431:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18432-		/* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on
 --
 net/wireless/nl80211.c-18442-		.dumpit = nl80211_dump_mpath,
 net/wireless/nl80211.c:18443:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18444-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18450-		.dumpit = nl80211_dump_mpp,
 net/wireless/nl80211.c:18451:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18452-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18457-		.doit = nl80211_set_mpath,
 net/wireless/nl80211.c:18458:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18459-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18464-		.doit = nl80211_new_mpath,
 net/wireless/nl80211.c:18465:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18466-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18471-		.doit = nl80211_del_mpath,
 net/wireless/nl80211.c:18472:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18473-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18478-		.doit = nl80211_set_bss,
 net/wireless/nl80211.c:18479:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18480-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18520-		.doit = nl80211_update_mesh_config,
 net/wireless/nl80211.c:18521:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18522-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18527-		.doit = nl80211_trigger_scan,
 net/wireless/nl80211.c:18528:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18529-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
 --
 net/wireless/nl80211.c-18534-		.doit = nl80211_abort_scan,
 net/wireless/nl80211.c:18535:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18536-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
 --
 net/wireless/nl80211.c-18546-		.doit = nl80211_start_sched_scan,
 net/wireless/nl80211.c:18547:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18548-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18553-		.doit = nl80211_stop_sched_scan,
 net/wireless/nl80211.c:18554:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18555-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18560-		.doit = nl80211_authenticate,
 net/wireless/nl80211.c:18561:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18562-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18568-		.doit = nl80211_associate,
 net/wireless/nl80211.c:18569:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18570-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
 --
 net/wireless/nl80211.c-18576-		.doit = nl80211_deauthenticate,
 net/wireless/nl80211.c:18577:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18578-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18583-		.doit = nl80211_disassociate,
 net/wireless/nl80211.c:18584:		.flags = GENL_UNS_ADMIN_PERM,
 net/wireless/nl80211.c-18585-		.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
 --
 net/wireless/nl80211.c-18590-		.doit = nl80211_join_ibss,
 net/wireless/nl80211.c:18591:		.flags = GENL_UNS_ADMIN_PERM,
]
]

gemini-3-flash-preview

							input: 117472
							output: 27
							thoughts: 49
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Investigating `GENL_UNS_ADMIN_PERM`**

Right, let's dive into this. My initial instinct is to track down the definition of `GENL_UNS_ADMIN_PERM`. I need to understand its context and intended use. Where is this thing defined? Ah, I remember, that's typically where these generic netlink permissions macros hang out. Yep, it's in `include/uapi/linux/genetlink.h`. Now, the crucial part. I need to see if there are any informative comments associated with this macro. Are there any caveats, usage guidelines, or related security considerations explicitly laid out in the header file? Hopefully, there's some valuable documentation to flesh out the design assumptions.

map[File:include/uapi/linux/genetlink.h]

map[Contents:/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI__LINUX_GENERIC_NETLINK_H
#define _UAPI__LINUX_GENERIC_NETLINK_H

#include <linux/types.h>
#include <linux/netlink.h>

#define GENL_NAMSIZ	16	/* length of family name */

#define GENL_MIN_ID	NLMSG_MIN_TYPE
#define GENL_MAX_ID	1023

struct genlmsghdr {
	__u8	cmd;
	__u8	version;
	__u16	reserved;
};

#define GENL_HDRLEN	NLMSG_ALIGN(sizeof(struct genlmsghdr))

#define GENL_ADMIN_PERM		0x01
#define GENL_CMD_CAP_DO		0x02
#define GENL_CMD_CAP_DUMP	0x04
#define GENL_CMD_CAP_HASPOL	0x08
#define GENL_UNS_ADMIN_PERM	0x10

/*
 * List of reserved static generic netlink identifiers:
 */
#define GENL_ID_CTRL		NLMSG_MIN_TYPE
#define GENL_ID_VFS_DQUOT	(NLMSG_MIN_TYPE + 1)
#define GENL_ID_PMCRAID		(NLMSG_MIN_TYPE + 2)
/* must be last reserved + 1 */
#define GENL_START_ALLOC	(NLMSG_MIN_TYPE + 3)

/**************************************************************************
 * Controller
 **************************************************************************/

enum {
	CTRL_CMD_UNSPEC,
	CTRL_CMD_NEWFAMILY,
	CTRL_CMD_DELFAMILY,
	CTRL_CMD_GETFAMILY,
	CTRL_CMD_NEWOPS,
	CTRL_CMD_DELOPS,
	CTRL_CMD_GETOPS,
	CTRL_CMD_NEWMCAST_GRP,
	CTRL_CMD_DELMCAST_GRP,
	CTRL_CMD_GETMCAST_GRP, /* unused */
	CTRL_CMD_GETPOLICY,
	__CTRL_CMD_MAX,
};

#define CTRL_CMD_MAX (__CTRL_CMD_MAX - 1)

enum {
	CTRL_ATTR_UNSPEC,
	CTRL_ATTR_FAMILY_ID,
	CTRL_ATTR_FAMILY_NAME,
	CTRL_ATTR_VERSION,
	CTRL_ATTR_HDRSIZE,
	CTRL_ATTR_MAXATTR,
	CTRL_ATTR_OPS,
	CTRL_ATTR_MCAST_GROUPS,
	CTRL_ATTR_POLICY,
	CTRL_ATTR_OP_POLICY,
	CTRL_ATTR_OP,
	__CTRL_ATTR_MAX,
};

#define CTRL_ATTR_MAX (__CTRL_ATTR_MAX - 1)

enum {
	CTRL_ATTR_OP_UNSPEC,
	CTRL_ATTR_OP_ID,
	CTRL_ATTR_OP_FLAGS,
	__CTRL_ATTR_OP_MAX,
};

#define CTRL_ATTR_OP_MAX (__CTRL_ATTR_OP_MAX - 1)

enum {
	CTRL_ATTR_MCAST_GRP_UNSPEC,
	CTRL_ATTR_MCAST_GRP_NAME,
	CTRL_ATTR_MCAST_GRP_ID,
	__CTRL_ATTR_MCAST_GRP_MAX,
};

#define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1)

enum {
	CTRL_ATTR_POLICY_UNSPEC,
	CTRL_ATTR_POLICY_DO,
	CTRL_ATTR_POLICY_DUMP,

	__CTRL_ATTR_POLICY_DUMP_MAX,
	CTRL_ATTR_POLICY_DUMP_MAX = __CTRL_ATTR_POLICY_DUMP_MAX - 1
};

#define CTRL_ATTR_POLICY_MAX (__CTRL_ATTR_POLICY_DUMP_MAX - 1)

#endif /* _UAPI__LINUX_GENERIC_NETLINK_H */
]

gemini-3-flash-preview

							input: 118685
							output: 24
							thoughts: 19
						

Here's my thought process, as if I were reviewing this:

**Digging into genetlink.h**

Okay, so there's nothing immediately jumping out from the original "no comments" observation. Time to get my hands dirty and dive directly into the `include/net/genetlink.h` header file. That's usually the best place to start when I want to understand the structure and fundamental definitions of a generic netlink implementation. I'm expecting to find the core data structures, macros, and function prototypes that define how the whole thing is set up and how different families and messages interact. I'll be looking for things like family identifiers, attribute definitions, message formats, and any important constants or flags. This header file is the Rosetta Stone for understanding this particular netlink implementation, so let's get to it!

map[File:include/net/genetlink.h]

map[Contents:/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_GENERIC_NETLINK_H
#define __NET_GENERIC_NETLINK_H

#include <linux/net.h>
#include <net/netlink.h>
#include <net/net_namespace.h>
#include <uapi/linux/genetlink.h>

#define GENLMSG_DEFAULT_SIZE (NLMSG_DEFAULT_SIZE - GENL_HDRLEN)

/* Non-parallel generic netlink requests are serialized by a global lock. */
void genl_lock(void);
void genl_unlock(void);

#define MODULE_ALIAS_GENL_FAMILY(family) \
 MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family)

/* Binding to multicast group requires %CAP_NET_ADMIN */
#define GENL_MCAST_CAP_NET_ADMIN	BIT(0)
/* Binding to multicast group requires %CAP_SYS_ADMIN */
#define GENL_MCAST_CAP_SYS_ADMIN	BIT(1)

/**
 * struct genl_multicast_group - generic netlink multicast group
 * @name: name of the multicast group, names are per-family
 * @flags: GENL_MCAST_* flags
 */
struct genl_multicast_group {
	char			name[GENL_NAMSIZ];
	u8			flags;
};

struct genl_split_ops;
struct genl_info;

/**
 * struct genl_family - generic netlink family
 * @hdrsize: length of user specific header in bytes
 * @name: name of family
 * @version: protocol version
 * @maxattr: maximum number of attributes supported
 * @policy: netlink policy
 * @netnsok: set to true if the family can handle network
 *	namespaces and should be presented in all of them
 * @parallel_ops: operations can be called in parallel and aren't
 *	synchronized by the core genetlink code
 * @pre_doit: called before an operation's doit callback, it may
 *	do additional, common, filtering and return an error
 * @post_doit: called after an operation's doit callback, it may
 *	undo operations done by pre_doit, for example release locks
 * @bind: called when family multicast group is added to a netlink socket
 * @unbind: called when family multicast group is removed from a netlink socket
 * @module: pointer to the owning module (set to THIS_MODULE)
 * @mcgrps: multicast groups used by this family
 * @n_mcgrps: number of multicast groups
 * @resv_start_op: first operation for which reserved fields of the header
 *	can be validated and policies are required (see below);
 *	new families should leave this field at zero
 * @ops: the operations supported by this family
 * @n_ops: number of operations supported by this family
 * @small_ops: the small-struct operations supported by this family
 * @n_small_ops: number of small-struct operations supported by this family
 * @split_ops: the split do/dump form of operation definition
 * @n_split_ops: number of entries in @split_ops, note that with split do/dump
 *	ops the number of entries is not the same as number of commands
 * @sock_priv_size: the size of per-socket private memory
 * @sock_priv_init: the per-socket private memory initializer
 * @sock_priv_destroy: the per-socket private memory destructor
 *
 * Attribute policies (the combination of @policy and @maxattr fields)
 * can be attached at the family level or at the operation level.
 * If both are present the per-operation policy takes precedence.
 * For operations before @resv_start_op lack of policy means that the core
 * will perform no attribute parsing or validation. For newer operations
 * if policy is not provided core will reject all TLV attributes.
 */
struct genl_family {
	unsigned int		hdrsize;
	char			name[GENL_NAMSIZ];
	unsigned int		version;
	unsigned int		maxattr;
	u8			netnsok:1;
	u8			parallel_ops:1;
	u8			n_ops;
	u8			n_small_ops;
	u8			n_split_ops;
	u8			n_mcgrps;
	u8			resv_start_op;
	const struct nla_policy *policy;
	int			(*pre_doit)(const struct genl_split_ops *ops,
					    struct sk_buff *skb,
					    struct genl_info *info);
	void			(*post_doit)(const struct genl_split_ops *ops,
					     struct sk_buff *skb,
					     struct genl_info *info);
	int			(*bind)(int mcgrp);
	void			(*unbind)(int mcgrp);
	const struct genl_ops *	ops;
	const struct genl_small_ops *small_ops;
	const struct genl_split_ops *split_ops;
	const struct genl_multicast_group *mcgrps;
	struct module		*module;

	size_t			sock_priv_size;
	void			(*sock_priv_init)(void *priv);
	void			(*sock_priv_destroy)(void *priv);

/* private: internal use only */
	/* protocol family identifier */
	int			id;
	/* starting number of multicast group IDs in this family */
	unsigned int		mcgrp_offset;
	/* list of per-socket privs */
	struct xarray		*sock_privs;
};

/**
 * struct genl_info - receiving information
 * @snd_seq: sending sequence number
 * @snd_portid: netlink portid of sender
 * @family: generic netlink family
 * @nlhdr: netlink message header
 * @genlhdr: generic netlink message header
 * @attrs: netlink attributes
 * @_net: network namespace
 * @ctx: storage space for the use by the family
 * @user_ptr: user pointers (deprecated, use ctx instead)
 * @extack: extended ACK report struct
 */
struct genl_info {
	u32			snd_seq;
	u32			snd_portid;
	const struct genl_family *family;
	const struct nlmsghdr *	nlhdr;
	struct genlmsghdr *	genlhdr;
	struct nlattr **	attrs;
	possible_net_t		_net;
	union {
		u8		ctx[NETLINK_CTX_SIZE];
		void *		user_ptr[2];
	};
	struct netlink_ext_ack *extack;
};

static inline struct net *genl_info_net(const struct genl_info *info)
{
	return read_pnet(&info->_net);
}

static inline void genl_info_net_set(struct genl_info *info, struct net *net)
{
	write_pnet(&info->_net, net);
}

static inline void *genl_info_userhdr(const struct genl_info *info)
{
	return (u8 *)info->genlhdr + GENL_HDRLEN;
}

#define GENL_SET_ERR_MSG(info, msg) NL_SET_ERR_MSG((info)->extack, msg)

#define GENL_SET_ERR_MSG_FMT(info, msg, args...) \
	NL_SET_ERR_MSG_FMT((info)->extack, msg, ##args)

/* Report that a root attribute is missing */
#define GENL_REQ_ATTR_CHECK(info, attr) ({				\
	const struct genl_info *__info = (info);			\
									\
	NL_REQ_ATTR_CHECK(__info->extack, NULL, __info->attrs, (attr)); \
})

enum genl_validate_flags {
	GENL_DONT_VALIDATE_STRICT		= BIT(0),
	GENL_DONT_VALIDATE_DUMP			= BIT(1),
	GENL_DONT_VALIDATE_DUMP_STRICT		= BIT(2),
};

/**
 * struct genl_small_ops - generic netlink operations (small version)
 * @cmd: command identifier
 * @internal_flags: flags used by the family
 * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 * @validate: validation flags from enum genl_validate_flags
 * @doit: standard command callback
 * @dumpit: callback for dumpers
 *
 * This is a cut-down version of struct genl_ops for users who don't need
 * most of the ancillary infra and want to save space.
 */
struct genl_small_ops {
	int	(*doit)(struct sk_buff *skb, struct genl_info *info);
	int	(*dumpit)(struct sk_buff *skb, struct netlink_callback *cb);
	u8	cmd;
	u8	internal_flags;
	u8	flags;
	u8	validate;
};

/**
 * struct genl_ops - generic netlink operations
 * @cmd: command identifier
 * @internal_flags: flags used by the family
 * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 * @maxattr: maximum number of attributes supported
 * @policy: netlink policy (takes precedence over family policy)
 * @validate: validation flags from enum genl_validate_flags
 * @doit: standard command callback
 * @start: start callback for dumps
 * @dumpit: callback for dumpers
 * @done: completion callback for dumps
 */
struct genl_ops {
	int		       (*doit)(struct sk_buff *skb,
				       struct genl_info *info);
	int		       (*start)(struct netlink_callback *cb);
	int		       (*dumpit)(struct sk_buff *skb,
					 struct netlink_callback *cb);
	int		       (*done)(struct netlink_callback *cb);
	const struct nla_policy *policy;
	unsigned int		maxattr;
	u8			cmd;
	u8			internal_flags;
	u8			flags;
	u8			validate;
};

/**
 * struct genl_split_ops - generic netlink operations (do/dump split version)
 * @cmd: command identifier
 * @internal_flags: flags used by the family
 * @flags: GENL_* flags (%GENL_ADMIN_PERM or %GENL_UNS_ADMIN_PERM)
 * @validate: validation flags from enum genl_validate_flags
 * @policy: netlink policy (takes precedence over family policy)
 * @maxattr: maximum number of attributes supported
 *
 * Do callbacks:
 * @pre_doit: called before an operation's @doit callback, it may
 *	do additional, common, filtering and return an error
 * @doit: standard command callback
 * @post_doit: called after an operation's @doit callback, it may
 *	undo operations done by pre_doit, for example release locks
 *
 * Dump callbacks:
 * @start: start callback for dumps
 * @dumpit: callback for dumpers
 * @done: completion callback for dumps
 *
 * Do callbacks can be used if %GENL_CMD_CAP_DO is set in @flags.
 * Dump callbacks can be used if %GENL_CMD_CAP_DUMP is set in @flags.
 * Exactly one of those flags must be set.
 */
struct genl_split_ops {
	union {
		struct {
			int (*pre_doit)(const struct genl_split_ops *ops,
					struct sk_buff *skb,
					struct genl_info *info);
			int (*doit)(struct sk_buff *skb,
				    struct genl_info *info);
			void (*post_doit)(const struct genl_split_ops *ops,
					  struct sk_buff *skb,
					  struct genl_info *info);
		};
		struct {
			int (*start)(struct netlink_callback *cb);
			int (*dumpit)(struct sk_buff *skb,
				      struct netlink_callback *cb);
			int (*done)(struct netlink_callback *cb);
		};
	};
	const struct nla_policy *policy;
	unsigned int		maxattr;
	u8			cmd;
	u8			internal_flags;
	u8			flags;
	u8			validate;
};

/**
 * struct genl_dumpit_info - info that is available during dumpit op call
 * @op: generic netlink ops - for internal genl code usage
 * @attrs: netlink attributes
 * @info: struct genl_info describing the request
 */
struct genl_dumpit_info {
	struct genl_split_ops op;
	struct genl_info info;
};

static inline const struct genl_dumpit_info *
genl_dumpit_info(struct netlink_callback *cb)
{
	return cb->data;
}

static inline const struct genl_info *
genl_info_dump(struct netlink_callback *cb)
{
	return &genl_dumpit_info(cb)->info;
}

/**
 * genl_info_init_ntf() - initialize genl_info for notifications
 * @info:   genl_info struct to set up
 * @family: pointer to the genetlink family
 * @cmd:    command to be used in the notification
 *
 * Initialize a locally declared struct genl_info to pass to various APIs.
 * Intended to be used when creating notifications.
 */
static inline void
genl_info_init_ntf(struct genl_info *info, const struct genl_family *family,
		   u8 cmd)
{
	struct genlmsghdr *hdr = (void *) &info->user_ptr[0];

	memset(info, 0, sizeof(*info));
	info->family = family;
	info->genlhdr = hdr;
	hdr->cmd = cmd;
}

static inline bool genl_info_is_ntf(const struct genl_info *info)
{
	return !info->nlhdr;
}

void *__genl_sk_priv_get(struct genl_family *family, struct sock *sk);
void *genl_sk_priv_get(struct genl_family *family, struct sock *sk);
int genl_register_family(struct genl_family *family);
int genl_unregister_family(const struct genl_family *family);
void genl_notify(const struct genl_family *family, struct sk_buff *skb,
		 struct genl_info *info, u32 group, gfp_t flags);

void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
		  const struct genl_family *family, int flags, u8 cmd);

static inline void *
__genlmsg_iput(struct sk_buff *skb, const struct genl_info *info, int flags)
{
	return genlmsg_put(skb, info->snd_portid, info->snd_seq, info->family,
			   flags, info->genlhdr->cmd);
}

/**
 * genlmsg_iput - start genetlink message based on genl_info
 * @skb: skb in which message header will be placed
 * @info: genl_info as provided to do/dump handlers
 *
 * Convenience wrapper which starts a genetlink message based on
 * information in user request. @info should be either the struct passed
 * by genetlink core to do/dump handlers (when constructing replies to
 * such requests) or a struct initialized by genl_info_init_ntf()
 * when constructing notifications.
 *
 * Returns: pointer to new genetlink header.
 */
static inline void *
genlmsg_iput(struct sk_buff *skb, const struct genl_info *info)
{
	return __genlmsg_iput(skb, info, 0);
}

/**
 * genlmsg_nlhdr - Obtain netlink header from user specified header
 * @user_hdr: user header as returned from genlmsg_put()
 *
 * Returns: pointer to netlink header.
 */
static inline struct nlmsghdr *genlmsg_nlhdr(void *user_hdr)
{
	return (struct nlmsghdr *)((char *)user_hdr -
				   GENL_HDRLEN -
				   NLMSG_HDRLEN);
}

/**
 * genlmsg_parse_deprecated - parse attributes of a genetlink message
 * @nlh: netlink message header
 * @family: genetlink message family
 * @tb: destination array with maxtype+1 elements
 * @maxtype: maximum attribute type to be expected
 * @policy: validation policy
 * @extack: extended ACK report struct
 */
static inline int genlmsg_parse_deprecated(const struct nlmsghdr *nlh,
					   const struct genl_family *family,
					   struct nlattr *tb[], int maxtype,
					   const struct nla_policy *policy,
					   struct netlink_ext_ack *extack)
{
	return __nlmsg_parse(nlh, family->hdrsize + GENL_HDRLEN, tb, maxtype,
			     policy, NL_VALIDATE_LIBERAL, extack);
}

/**
 * genlmsg_parse - parse attributes of a genetlink message
 * @nlh: netlink message header
 * @family: genetlink message family
 * @tb: destination array with maxtype+1 elements
 * @maxtype: maximum attribute type to be expected
 * @policy: validation policy
 * @extack: extended ACK report struct
 */
static inline int genlmsg_parse(const struct nlmsghdr *nlh,
				const struct genl_family *family,
				struct nlattr *tb[], int maxtype,
				const struct nla_policy *policy,
				struct netlink_ext_ack *extack)
{
	return __nlmsg_parse(nlh, family->hdrsize + GENL_HDRLEN, tb, maxtype,
			     policy, NL_VALIDATE_STRICT, extack);
}

/**
 * genl_dump_check_consistent - check if sequence is consistent and advertise if not
 * @cb: netlink callback structure that stores the sequence number
 * @user_hdr: user header as returned from genlmsg_put()
 *
 * Cf. nl_dump_check_consistent(), this just provides a wrapper to make it
 * simpler to use with generic netlink.
 */
static inline void genl_dump_check_consistent(struct netlink_callback *cb,
					      void *user_hdr)
{
	nl_dump_check_consistent(cb, genlmsg_nlhdr(user_hdr));
}

/**
 * genlmsg_put_reply - Add generic netlink header to a reply message
 * @skb: socket buffer holding the message
 * @info: receiver info
 * @family: generic netlink family
 * @flags: netlink message flags
 * @cmd: generic netlink command
 *
 * Returns: pointer to user specific header
 */
static inline void *genlmsg_put_reply(struct sk_buff *skb,
				      struct genl_info *info,
				      const struct genl_family *family,
				      int flags, u8 cmd)
{
	return genlmsg_put(skb, info->snd_portid, info->snd_seq, family,
			   flags, cmd);
}

/**
 * genlmsg_end - Finalize a generic netlink message
 * @skb: socket buffer the message is stored in
 * @hdr: user specific header
 */
static inline void genlmsg_end(struct sk_buff *skb, void *hdr)
{
	nlmsg_end(skb, hdr - GENL_HDRLEN - NLMSG_HDRLEN);
}

/**
 * genlmsg_cancel - Cancel construction of a generic netlink message
 * @skb: socket buffer the message is stored in
 * @hdr: generic netlink message header
 */
static inline void genlmsg_cancel(struct sk_buff *skb, void *hdr)
{
	if (hdr)
		nlmsg_cancel(skb, hdr - GENL_HDRLEN - NLMSG_HDRLEN);
}

/**
 * genlmsg_multicast_netns_filtered - multicast a netlink message
 *				      to a specific netns with filter
 *				      function
 * @family: the generic netlink family
 * @net: the net namespace
 * @skb: netlink message as socket buffer
 * @portid: own netlink portid to avoid sending to yourself
 * @group: offset of multicast group in groups array
 * @flags: allocation flags
 * @filter: filter function
 * @filter_data: filter function private data
 *
 * Return: 0 on success, negative error code for failure.
 */
static inline int
genlmsg_multicast_netns_filtered(const struct genl_family *family,
				 struct net *net, struct sk_buff *skb,
				 u32 portid, unsigned int group, gfp_t flags,
				 netlink_filter_fn filter,
				 void *filter_data)
{
	if (WARN_ON_ONCE(group >= family->n_mcgrps))
		return -EINVAL;
	group = family->mcgrp_offset + group;
	return nlmsg_multicast_filtered(net->genl_sock, skb, portid, group,
					flags, filter, filter_data);
}

/**
 * genlmsg_multicast_netns - multicast a netlink message to a specific netns
 * @family: the generic netlink family
 * @net: the net namespace
 * @skb: netlink message as socket buffer
 * @portid: own netlink portid to avoid sending to yourself
 * @group: offset of multicast group in groups array
 * @flags: allocation flags
 */
static inline int genlmsg_multicast_netns(const struct genl_family *family,
					  struct net *net, struct sk_buff *skb,
					  u32 portid, unsigned int group, gfp_t flags)
{
	return genlmsg_multicast_netns_filtered(family, net, skb, portid,
						group, flags, NULL, NULL);
}

/**
 * genlmsg_multicast - multicast a netlink message to the default netns
 * @family: the generic netlink family
 * @skb: netlink message as socket buffer
 * @portid: own netlink portid to avoid sending to yourself
 * @group: offset of multicast group in groups array
 * @flags: allocation flags
 */
static inline int genlmsg_multicast(const struct genl_family *family,
				    struct sk_buff *skb, u32 portid,
				    unsigned int group, gfp_t flags)
{
	return genlmsg_multicast_netns(family, &init_net, skb,
				       portid, group, flags);
}

/**
 * genlmsg_multicast_allns - multicast a netlink message to all net namespaces
 * @family: the generic netlink family
 * @skb: netlink message as socket buffer
 * @portid: own netlink portid to avoid sending to yourself
 * @group: offset of multicast group in groups array
 *
 * This function must hold the RTNL or rcu_read_lock().
 */
int genlmsg_multicast_allns(const struct genl_family *family,
			    struct sk_buff *skb, u32 portid,
			    unsigned int group);

/**
 * genlmsg_unicast - unicast a netlink message
 * @net: network namespace to look up @portid in
 * @skb: netlink message as socket buffer
 * @portid: netlink portid of the destination socket
 */
static inline int genlmsg_unicast(struct net *net, struct sk_buff *skb, u32 portid)
{
	return nlmsg_unicast(net->genl_sock, skb, portid);
}

/**
 * genlmsg_reply - reply to a request
 * @skb: netlink message to be sent back
 * @info: receiver information
 */
static inline int genlmsg_reply(struct sk_buff *skb, struct genl_info *info)
{
	return genlmsg_unicast(genl_info_net(info), skb, info->snd_portid);
}

/**
 * genlmsg_data - head of message payload
 * @gnlh: genetlink message header
 */
static inline void *genlmsg_data(const struct genlmsghdr *gnlh)
{
	return ((unsigned char *) gnlh + GENL_HDRLEN);
}

/**
 * genlmsg_len - length of message payload
 * @gnlh: genetlink message header
 */
static inline int genlmsg_len(const struct genlmsghdr *gnlh)
{
	struct nlmsghdr *nlh = (struct nlmsghdr *)((unsigned char *)gnlh -
							NLMSG_HDRLEN);
	return (nlh->nlmsg_len - GENL_HDRLEN - NLMSG_HDRLEN);
}

/**
 * genlmsg_msg_size - length of genetlink message not including padding
 * @payload: length of message payload
 */
static inline int genlmsg_msg_size(int payload)
{
	return GENL_HDRLEN + payload;
}

/**
 * genlmsg_total_size - length of genetlink message including padding
 * @payload: length of message payload
 */
static inline int genlmsg_total_size(int payload)
{
	return NLMSG_ALIGN(genlmsg_msg_size(payload));
}

/**
 * genlmsg_new - Allocate a new generic netlink message
 * @payload: size of the message payload
 * @flags: the type of memory to allocate.
 */
static inline struct sk_buff *genlmsg_new(size_t payload, gfp_t flags)
{
	return nlmsg_new(genlmsg_total_size(payload), flags);
}

/**
 * genl_set_err - report error to genetlink broadcast listeners
 * @family: the generic netlink family
 * @net: the network namespace to report the error to
 * @portid: the PORTID of a process that we want to skip (if any)
 * @group: the broadcast group that will notice the error
 * 	(this is the offset of the multicast group in the groups array)
 * @code: error code, must be negative (as usual in kernelspace)
 *
 * This function returns the number of broadcast listeners that have set the
 * NETLINK_RECV_NO_ENOBUFS socket option.
 */
static inline int genl_set_err(const struct genl_family *family,
			       struct net *net, u32 portid,
			       u32 group, int code)
{
	if (WARN_ON_ONCE(group >= family->n_mcgrps))
		return -EINVAL;
	group = family->mcgrp_offset + group;
	return netlink_set_err(net->genl_sock, portid, group, code);
}

static inline int genl_has_listeners(const struct genl_family *family,
				     struct net *net, unsigned int group)
{
	if (WARN_ON_ONCE(group >= family->n_mcgrps))
		return -EINVAL;
	group = family->mcgrp_offset + group;
	return netlink_has_listeners(net->genl_sock, group);
}
#endif	/* __NET_GENERIC_NETLINK_H */
]

gemini-3-flash-preview

							input: 125563
							output: 48
							thoughts: 775
						

**Analyzing Access to NL80211_CMD_TDLS_MGMT**

Okay, let's break down this `NL80211_CMD_TDLS_MGMT` command and its accessibility. I've been looking at the documentation in `include/net/genetlink.h` and the way these permission flags are handled in `net/netlink/genetlink.c`. From what I see, both `GENL_ADMIN_PERM` and `GENL_UNS_ADMIN_PERM` are relevant.

My understanding is this: `GENL_ADMIN_PERM` translates to checking for `CAP_NET_ADMIN` within the initial user namespace, which is linked to `init_user_ns`. `GENL_UNS_ADMIN_PERM`, on the other hand, calls `netlink_ns_capable` and checks for `CAP_NET_ADMIN` within the *user* namespace associated with the *network* namespace. This is crucial.

Given this, `NL80211_CMD_TDLS_MGMT` with its `GENL_UNS_ADMIN_PERM` flag, requires `CAP_NET_ADMIN` in the user namespace that owns the network namespace. This means the following:

1.  Root in the initial network namespace has access.
2.  Any user who creates their own network namespace, and therefore owns that network namespace, also has access because they have `CAP_NET_ADMIN` in the associated user namespace.

However, a standard, unprivileged user within the *initial* network namespace will not have `CAP_NET_ADMIN` in the *initial* user namespace, so they're blocked.

The catch is, while an unprivileged user can create their own network namespace and gain access to `NL80211_CMD_TDLS_MGMT` there, they'd have no wireless devices to manage initially. Moving a wireless device from the initial network namespace to a new one *requires* `CAP_NET_ADMIN` in the initial user namespace.

So, in the typical unprivileged user scenario on a standard system, access to `NL80211_CMD_TDLS_MGMT` is blocked for system's existing wireless interfaces.

Hold on, I need to consider all possibilities. Are there other ways an unprivileged user could get a wireless device in their network namespace? Ah, perhaps `mac80211_hwsim`? Yes, I recall now: `mac80211_hwsim` also uses `GENL_UNS_ADMIN_PERM` when creating new radios. This is important.

**Key Insight:** An unprivileged user can create a *virtual* wireless radio using `mac80211_hwsim` in their own network namespace and then apply `NL80211_CMD_TDLS_MGMT` to it. But for physical hardware, they are restricted.

In summary, the question we're dealing with ("Is `NL80211_CMD_TDLS_MGMT` accessible to unprivileged users with `GENL_UNS_ADMIN_PERM`?") has a nuanced answer: It demands `CAP_NET_ADMIN` within the user namespace associated with the network namespace. Thus, it *is* accessible to unprivileged users if they are in their own user-namespace (which applies if they create one) but only usable with virtual devices within it.
I should check the git history of `net/wireless/nl80211.c` for `NL80211_CMD_TDLS_MGMT` to ensure that this behavior is consistent over time.

map[CodeRegexp:NL80211_CMD_TDLS_MGMT PathPrefix:net/wireless/nl80211.c]

map[Output:109086ce0b0f nl80211: support sending TDLS commands/frames
]

gemini-3-flash-preview

							input: 127215
							output: 26
							thoughts: 7
						

Okay, here's my attempt at summarizing the thought process, tailored for an expert user and presented in the first person:

**Analyzing the Commit**

Right, let's dive into that commit. I need to quickly assess the changes, understand the rationale behind them, and anticipate any potential implications. My initial scan will be for the obvious: any breaking changes, performance bottlenecks, or security vulnerabilities that might jump out. Then I'll focus on the architecture and design: does this align with the project's overall strategy and best practices? Are there any unexpected dependencies introduced? Is the code clean, well-commented, and testable? The ideal scenario is a commit that clearly addresses a specific issue or implements a defined feature, with concise and relevant commit messages. A deep dive is sometimes necessary, especially for complex algorithms or refactoring efforts, but first, I need a quick high-level overview to get my bearings and frame my more detailed analysis. I can't wait to see if it’s well-structured and follows the defined coding standards.

map[Commit:109086ce0b0f]

map[Output:commit 109086ce0b0f94760bdb0e8e2566ff8a2d673639
Author: Arik Nemtsov <arik@wizery.com>
Date:   Wed Sep 28 14:12:50 2011 +0300

    nl80211: support sending TDLS commands/frames
    
    Add support for sending high-level TDLS commands and TDLS frames via
    NL80211_CMD_TDLS_OPER and NL80211_CMD_TDLS_MGMT, respectively. Add
    appropriate cfg80211 callbacks for lower level drivers.
    
    Add wiphy capability flags for TDLS support and advertise them via
    nl80211.
    
    Signed-off-by: Arik Nemtsov <arik@wizery.com>
    Cc: Kalyan C Gaddam <chakkal@iit.edu>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index c73582fb9d20..a5ab23df5b17 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -506,6 +506,9 @@
  * @NL80211_CMD_PMKSA_CANDIDATE: This is used as an event to inform userspace
  *	of PMKSA caching dandidates.
  *
+ * @NL80211_CMD_TDLS_OPER: Perform a high-level TDLS command (e.g. link setup).
+ * @NL80211_CMD_TDLS_MGMT: Send a TDLS management frame.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -632,6 +635,9 @@ enum nl80211_commands {
 
 	NL80211_CMD_PMKSA_CANDIDATE,
 
+	NL80211_CMD_TDLS_OPER,
+	NL80211_CMD_TDLS_MGMT,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -1089,6 +1095,20 @@ enum nl80211_commands {
  *	This attribute is used with %NL80211_CMD_TRIGGER_SCAN and
  *	%NL80211_CMD_FRAME commands.
  *
+ * @NL80211_ATTR_TDLS_ACTION: Low level TDLS action code (e.g. link setup
+ *	request, link setup confirm, link teardown, etc.). Values are
+ *	described in the TDLS (802.11z) specification.
+ * @NL80211_ATTR_TDLS_DIALOG_TOKEN: Non-zero token for uniquely identifying a
+ *	TDLS conversation between two devices.
+ * @NL80211_ATTR_TDLS_OPERATION: High level TDLS operation; see
+ *	&enum nl80211_tdls_operation, represented as a u8.
+ * @NL80211_ATTR_TDLS_SUPPORT: A flag indicating the device can operate
+ *	as a TDLS peer sta.
+ * @NL80211_ATTR_TDLS_EXTERNAL_SETUP: The TDLS discovery/setup and teardown
+ *	procedures should be performed by sending TDLS packets via
+ *	%NL80211_CMD_TDLS_MGMT. Otherwise %NL80211_CMD_TDLS_OPER should be
+ *	used for asking the driver to perform a TDLS operation.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1311,6 +1331,12 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_TX_NO_CCK_RATE,
 
+	NL80211_ATTR_TDLS_ACTION,
+	NL80211_ATTR_TDLS_DIALOG_TOKEN,
+	NL80211_ATTR_TDLS_OPERATION,
+	NL80211_ATTR_TDLS_SUPPORT,
+	NL80211_ATTR_TDLS_EXTERNAL_SETUP,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
@@ -2604,4 +2630,20 @@ enum nl80211_pmksa_candidate_attr {
 	MAX_NL80211_PMKSA_CANDIDATE = NUM_NL80211_PMKSA_CANDIDATE - 1
 };
 
+/**
+ * enum nl80211_tdls_operation - values for %NL80211_ATTR_TDLS_OPERATION
+ * @NL80211_TDLS_DISCOVERY_REQ: Send a TDLS discovery request
+ * @NL80211_TDLS_SETUP: Setup TDLS link
+ * @NL80211_TDLS_TEARDOWN: Teardown a TDLS link which is already established
+ * @NL80211_TDLS_ENABLE_LINK: Enable TDLS link
+ * @NL80211_TDLS_DISABLE_LINK: Disable TDLS link
+ */
+enum nl80211_tdls_operation {
+	NL80211_TDLS_DISCOVERY_REQ,
+	NL80211_TDLS_SETUP,
+	NL80211_TDLS_TEARDOWN,
+	NL80211_TDLS_ENABLE_LINK,
+	NL80211_TDLS_DISABLE_LINK,
+};
+
 #endif /* __LINUX_NL80211_H */
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 34b8f269976b..74f4f85be32f 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1422,6 +1422,9 @@ struct cfg80211_gtk_rekey_data {
  * @set_ringparam: Set tx and rx ring sizes.
  *
  * @get_ringparam: Get tx and rx ring current and maximum sizes.
+ *
+ * @tdls_mgmt: Transmit a TDLS management frame.
+ * @tdls_oper: Perform a high-level TDLS operation (e.g. TDLS link setup).
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -1605,6 +1608,12 @@ struct cfg80211_ops {
 
 	int	(*set_rekey_data)(struct wiphy *wiphy, struct net_device *dev,
 				  struct cfg80211_gtk_rekey_data *data);
+
+	int	(*tdls_mgmt)(struct wiphy *wiphy, struct net_device *dev,
+			     u8 *peer, u8 action_code,  u8 dialog_token,
+			     u16 status_code, const u8 *buf, size_t len);
+	int	(*tdls_oper)(struct wiphy *wiphy, struct net_device *dev,
+			     u8 *peer, enum nl80211_tdls_operation oper);
 };
 
 /*
@@ -1657,6 +1666,12 @@ struct cfg80211_ops {
  * @WIPHY_FLAG_SUPPORTS_FW_ROAM: The device supports roaming feature in the
  *	firmware.
  * @WIPHY_FLAG_AP_UAPSD: The device supports uapsd on AP.
+ * @WIPHY_FLAG_SUPPORTS_TDLS: The device supports TDLS (802.11z) operation.
+ * @WIPHY_FLAG_TDLS_EXTERNAL_SETUP: The device does not handle TDLS (802.11z)
+ *	link setup/discovery operations internally. Setup, discovery and
+ *	teardown packets should be sent through the @NL80211_CMD_TDLS_MGMT
+ *	command. When this flag is not set, @NL80211_CMD_TDLS_OPER should be
+ *	used for asking the driver/firmware to perform a TDLS operation.
  */
 enum wiphy_flags {
 	WIPHY_FLAG_CUSTOM_REGULATORY		= BIT(0),
@@ -1673,6 +1688,8 @@ enum wiphy_flags {
 	WIPHY_FLAG_ENFORCE_COMBINATIONS		= BIT(12),
 	WIPHY_FLAG_SUPPORTS_FW_ROAM		= BIT(13),
 	WIPHY_FLAG_AP_UAPSD			= BIT(14),
+	WIPHY_FLAG_SUPPORTS_TDLS		= BIT(15),
+	WIPHY_FLAG_TDLS_EXTERNAL_SETUP		= BIT(16),
 };
 
 /**
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 3799623e7f46..25a37fc951e3 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -192,6 +192,11 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 	[NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 	[NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 	[NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
+	[NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
+	[NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
+	[NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
+	[NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
+	[NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 };
 
 /* policy for the key attributes */
@@ -732,9 +737,12 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 	if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
 		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
-
 	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
 		NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
+	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
+		NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
+	if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
+		NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
 
 	NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 		sizeof(u32) * dev->wiphy.n_cipher_suites,
@@ -877,6 +885,10 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 	}
 	CMD(set_channel, SET_CHANNEL);
 	CMD(set_wds_peer, SET_WDS_PEER);
+	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
+		CMD(tdls_mgmt, TDLS_MGMT);
+		CMD(tdls_oper, TDLS_OPER);
+	}
 	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 		CMD(sched_scan_start, START_SCHED_SCAN);
 
@@ -4966,6 +4978,57 @@ static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
 	return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
 }
 
+static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *rdev = info->user_ptr[0];
+	struct net_device *dev = info->user_ptr[1];
+	u8 action_code, dialog_token;
+	u16 status_code;
+	u8 *peer;
+
+	if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
+	    !rdev->ops->tdls_mgmt)
+		return -EOPNOTSUPP;
+
+	if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
+	    !info->attrs[NL80211_ATTR_STATUS_CODE] ||
+	    !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
+	    !info->attrs[NL80211_ATTR_IE] ||
+	    !info->attrs[NL80211_ATTR_MAC])
+		return -EINVAL;
+
+	peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
+	action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
+	status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
+	dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
+
+	return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
+				    dialog_token, status_code,
+				    nla_data(info->attrs[NL80211_ATTR_IE]),
+				    nla_len(info->attrs[NL80211_ATTR_IE]));
+}
+
+static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg80211_registered_device *rdev = info->user_ptr[0];
+	struct net_device *dev = info->user_ptr[1];
+	enum nl80211_tdls_operation operation;
+	u8 *peer;
+
+	if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
+	    !rdev->ops->tdls_oper)
+		return -EOPNOTSUPP;
+
+	if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
+	    !info->attrs[NL80211_ATTR_MAC])
+		return -EINVAL;
+
+	operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
+	peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
+
+	return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
+}
+
 static int nl80211_remain_on_channel(struct sk_buff *skb,
 				     struct genl_info *info)
 {
@@ -6281,6 +6344,22 @@ static struct genl_ops nl80211_ops[] = {
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
+	{
+		.cmd = NL80211_CMD_TDLS_MGMT,
+		.doit = nl80211_tdls_mgmt,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
+				  NL80211_FLAG_NEED_RTNL,
+	},
+	{
+		.cmd = NL80211_CMD_TDLS_OPER,
+		.doit = nl80211_tdls_oper,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
+				  NL80211_FLAG_NEED_RTNL,
+	},
 };
 
 static struct genl_multicast_group nl80211_mlme_mcgrp = {
]

gemini-3-flash-preview

							input: 132103
							output: 45
							thoughts: 45
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating a Permissions Change in the Generic Netlink Subsystem**

Alright, so I'm looking at this code and I've noticed a subtle but potentially significant shift in the permission flags for this Generic Netlink family. The original commit, as I recall, used `GENL_ADMIN_PERM`. Now, it's been updated to `GENL_UNS_ADMIN_PERM`. This could be important. It looks like it could change access to the functionality.

The key thing now is to figure out precisely *when* that change was introduced. The evolution of permissions, especially in kernel space, is something I need to understand thoroughly. A change like this can have implications for security, and operational management. I need to pinpoint the commit that made this alteration to assess the rationale, understand the context, and be sure there isn't an issue. Time to dig into the version control and trace this back.

map[CodeRegexp:GENL_UNS_ADMIN_PERM PathPrefix:net/wireless/nl80211.c]

map[Output:904c27734293 wifi: cfg80211: Add support for controlling EPCS
65c1c0417984 wifi: cfg80211: Add support for dynamic addition/removal of links
b61e6b41a2f6 wifi: cfg80211: Add support for setting TID to link mapping
cbbaf2bb829b wifi: nl80211: add a command to enable/disable HW timestamping
577e5b8c3924 wifi: cfg80211: add API to add/modify/remove a link station
7b0a0e3c3a88 wifi: cfg80211: do some rework towards MLO link APIs
e306784a8de0 cfg80211: AP mode driver offload for FILS association crypto
0d2ab3aea50b nl80211: add support for BSS coloring
6bdb68cef7bf nl80211: add common API to configure SAR power limitations
e7e0517c1004 cfg80211: remove WDS code
]

gemini-3-flash-preview

							input: 132700
							output: 50
							thoughts: 101
						

**Tracing the Permission Shift**

Okay, so I need to figure out the history here. My first instinct is to track down the commit that globally replaced `GENL_ADMIN_PERM` with `GENL_UNS_ADMIN_PERM` – or at least, the one affecting this particular command. Wait, that's not quite right. Thinking it through, the introduction of `GENL_UNS_ADMIN_PERM` was likely driven by the need to grant specific privileges within user namespaces. That's the key.

So, instead of searching for a direct replacement, I should focus on the introduction of the user namespace permission itself. Let's narrow the search and target `net/wireless/nl80211.c`. That file is a good starting point, and I have a feeling the change regarding `GENL_UNS_ADMIN_PERM` would be localized there initially. Let's see what we find.

map[CodeRegexp:GENL_UNS_ADMIN_PERM Count:20 PathPrefix:net/wireless/nl80211.c]

map[Output:904c27734293 wifi: cfg80211: Add support for controlling EPCS
65c1c0417984 wifi: cfg80211: Add support for dynamic addition/removal of links
b61e6b41a2f6 wifi: cfg80211: Add support for setting TID to link mapping
cbbaf2bb829b wifi: nl80211: add a command to enable/disable HW timestamping
577e5b8c3924 wifi: cfg80211: add API to add/modify/remove a link station
7b0a0e3c3a88 wifi: cfg80211: do some rework towards MLO link APIs
e306784a8de0 cfg80211: AP mode driver offload for FILS association crypto
0d2ab3aea50b nl80211: add support for BSS coloring
6bdb68cef7bf nl80211: add common API to configure SAR power limitations
e7e0517c1004 cfg80211: remove WDS code
77f576deaa39 nl80211: Add NL command to support TID speicific configurations
5ab92e7fe49a cfg80211: add support to probe unexercised mesh link
30c63115e20b nl80211: Add support to notify radar event info received from STA
9bb7e0f24e7e cfg80211: add peer measurement with FTM initiator API
2576a9ace47e nl80211: Implement TX of control port frames
ce0ce13a1c89 cfg80211: configure multicast to unicast for AP interfaces
5617c6cd6f84 nl80211: Allow privileged operations from user namespaces
]

gemini-3-flash-preview

							input: 133533
							output: 26
							thoughts: 33
						

Okay, here's my interpretation of that commit and my related thoughts, presented as a first-person expert summary:

**Analyzing a Kernel Patch: `nl80211` and User Namespaces**

Alright, let's see... commit `5617c6cd6f84`. Hmm, the description is pretty concise: "nl80211: Allow privileged operations from user namespaces." Okay, instantly I'm thinking about the implications here. `nl80211` is the kernel's wireless networking subsystem, and it's always a point of interest, especially from a security standpoint. "Privileged operations from user namespaces"... that's the key phrase.

This is a significant change. Previously, if you were inside a user namespace and wanted to manipulate wireless interfaces or perform any `nl80211` related action that required higher privileges, you'd be blocked, or you'd need some hacky workarounds. It looks like this patch is changing that fundamental restriction. Now, within the security domain I'm familiar with, this makes sense in specific applications of containerization or lightweight virtualization, where you want to expose wireless functionality without giving the container full root access to the host kernel. I'm wondering what the specific motivation was for this change. I'd need to dig deeper into the commit message to see the rationale, any security considerations the developer addressed and any specific use cases they had in mind.

My initial reaction is to think about the attack surface. By allowing these privileged operations, are we opening a vulnerability? If so, where? Or, is the patch carefully designed with specific checks and balances in place to mitigate that risk? The potential for privilege escalation is always a concern. I immediately want to see the code changes to understand the access controls and how this has been implemented. I need to be sure that this change is not simply bypassing existing security boundaries without a strong justification.

Essentially, I'm already formulating questions: What are the security implications? What are the potential vulnerabilities introduced? Is there adequate sandboxing and isolation in place? How robust is the authorization system? Are there any audit trails? I need to analyze this very carefully to determine if this is a net positive or a potential security risk in different scenarios. I'm definitely going to dive into the code.

map[Commit:5617c6cd6f84]

map[Output:commit 5617c6cd6f844eaa2f4d61f165b7e6664a658865
Author: Martin Willi <martin@strongswan.org>
Date:   Mon May 9 18:33:58 2016 +0200

    nl80211: Allow privileged operations from user namespaces
    
    While a wiphy can be transferred to network namespaces, a process having
    CAP_NET_ADMIN in a non-initial user namespace can not administrate such
    devices due to the genetlink GENL_ADMIN_PERM restrictions.
    
    For openvswitch having the same issue, a new GENL_UNS_ADMIN_PERM flag has
    been introduced, commit 4a92602aa1cd ("openvswitch: allow management from
    inside user namespaces"). This patch changes all privileged operations
    operating on a wiphy, dev or wdev to allow their administration using the
    same mechanism. All operations use either NEED_WIPHY, NEED_WDEV or
    NEED_NETDEV, which implies a namespace aware lookup of the device. The only
    exception is NL80211_CMD_SET_WIPHY, which explicitly uses a namespace aware
    phy lookup.
    
    Signed-off-by: Martin Willi <martin@strongswan.org>
    [also allow cancel scan, for completeness]
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index d7599014055d..bf75afa18699 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -10945,7 +10945,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_WIPHY,
 		.doit = nl80211_set_wiphy,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_RTNL,
 	},
 	{
@@ -10961,7 +10961,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_INTERFACE,
 		.doit = nl80211_set_interface,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -10969,7 +10969,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_NEW_INTERFACE,
 		.doit = nl80211_new_interface,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -10977,7 +10977,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DEL_INTERFACE,
 		.doit = nl80211_del_interface,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -10985,7 +10985,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_GET_KEY,
 		.doit = nl80211_get_key,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -10993,7 +10993,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_KEY,
 		.doit = nl80211_set_key,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL |
 				  NL80211_FLAG_CLEAR_SKB,
@@ -11002,7 +11002,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_NEW_KEY,
 		.doit = nl80211_new_key,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL |
 				  NL80211_FLAG_CLEAR_SKB,
@@ -11011,14 +11011,14 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DEL_KEY,
 		.doit = nl80211_del_key,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
 	{
 		.cmd = NL80211_CMD_SET_BEACON,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.doit = nl80211_set_beacon,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
@@ -11026,7 +11026,7 @@ static const struct genl_ops nl80211_ops[] = {
 	{
 		.cmd = NL80211_CMD_START_AP,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.doit = nl80211_start_ap,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
@@ -11034,7 +11034,7 @@ static const struct genl_ops nl80211_ops[] = {
 	{
 		.cmd = NL80211_CMD_STOP_AP,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.doit = nl80211_stop_ap,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
@@ -11051,7 +11051,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_STATION,
 		.doit = nl80211_set_station,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11059,7 +11059,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_NEW_STATION,
 		.doit = nl80211_new_station,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11067,7 +11067,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DEL_STATION,
 		.doit = nl80211_del_station,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11076,7 +11076,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.doit = nl80211_get_mpath,
 		.dumpit = nl80211_dump_mpath,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11085,7 +11085,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.doit = nl80211_get_mpp,
 		.dumpit = nl80211_dump_mpp,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11093,7 +11093,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_MPATH,
 		.doit = nl80211_set_mpath,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11101,7 +11101,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_NEW_MPATH,
 		.doit = nl80211_new_mpath,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11109,7 +11109,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DEL_MPATH,
 		.doit = nl80211_del_mpath,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11117,7 +11117,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_BSS,
 		.doit = nl80211_set_bss,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11156,7 +11156,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_MESH_CONFIG,
 		.doit = nl80211_update_mesh_config,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11164,7 +11164,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_TRIGGER_SCAN,
 		.doit = nl80211_trigger_scan,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11172,7 +11172,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_ABORT_SCAN,
 		.doit = nl80211_abort_scan,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11185,7 +11185,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_START_SCHED_SCAN,
 		.doit = nl80211_start_sched_scan,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11193,7 +11193,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_STOP_SCHED_SCAN,
 		.doit = nl80211_stop_sched_scan,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11201,7 +11201,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_AUTHENTICATE,
 		.doit = nl80211_authenticate,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL |
 				  NL80211_FLAG_CLEAR_SKB,
@@ -11210,7 +11210,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_ASSOCIATE,
 		.doit = nl80211_associate,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11218,7 +11218,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DEAUTHENTICATE,
 		.doit = nl80211_deauthenticate,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11226,7 +11226,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DISASSOCIATE,
 		.doit = nl80211_disassociate,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11234,7 +11234,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_JOIN_IBSS,
 		.doit = nl80211_join_ibss,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11242,7 +11242,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_LEAVE_IBSS,
 		.doit = nl80211_leave_ibss,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11252,7 +11252,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.doit = nl80211_testmode_do,
 		.dumpit = nl80211_testmode_dump,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11261,7 +11261,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_CONNECT,
 		.doit = nl80211_connect,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11269,7 +11269,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DISCONNECT,
 		.doit = nl80211_disconnect,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11277,7 +11277,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_WIPHY_NETNS,
 		.doit = nl80211_wiphy_netns,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11290,7 +11290,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_PMKSA,
 		.doit = nl80211_setdel_pmksa,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11298,7 +11298,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DEL_PMKSA,
 		.doit = nl80211_setdel_pmksa,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11306,7 +11306,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_FLUSH_PMKSA,
 		.doit = nl80211_flush_pmksa,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11314,7 +11314,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
 		.doit = nl80211_remain_on_channel,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11322,7 +11322,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
 		.doit = nl80211_cancel_remain_on_channel,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11330,7 +11330,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
 		.doit = nl80211_set_tx_bitrate_mask,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11338,7 +11338,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_REGISTER_FRAME,
 		.doit = nl80211_register_mgmt,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11346,7 +11346,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_FRAME,
 		.doit = nl80211_tx_mgmt,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11354,7 +11354,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
 		.doit = nl80211_tx_mgmt_cancel_wait,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11362,7 +11362,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_POWER_SAVE,
 		.doit = nl80211_set_power_save,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11378,7 +11378,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_CQM,
 		.doit = nl80211_set_cqm,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11386,7 +11386,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_CHANNEL,
 		.doit = nl80211_set_channel,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11394,7 +11394,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_WDS_PEER,
 		.doit = nl80211_set_wds_peer,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11402,7 +11402,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_JOIN_MESH,
 		.doit = nl80211_join_mesh,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11410,7 +11410,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_LEAVE_MESH,
 		.doit = nl80211_leave_mesh,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11418,7 +11418,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_JOIN_OCB,
 		.doit = nl80211_join_ocb,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11426,7 +11426,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_LEAVE_OCB,
 		.doit = nl80211_leave_ocb,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11443,7 +11443,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_WOWLAN,
 		.doit = nl80211_set_wowlan,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11452,7 +11452,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
 		.doit = nl80211_set_rekey_data,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL |
 				  NL80211_FLAG_CLEAR_SKB,
@@ -11461,7 +11461,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_TDLS_MGMT,
 		.doit = nl80211_tdls_mgmt,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11469,7 +11469,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_TDLS_OPER,
 		.doit = nl80211_tdls_oper,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11477,7 +11477,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_UNEXPECTED_FRAME,
 		.doit = nl80211_register_unexpected_frame,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11485,7 +11485,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_PROBE_CLIENT,
 		.doit = nl80211_probe_client,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11493,7 +11493,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_REGISTER_BEACONS,
 		.doit = nl80211_register_beacons,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11501,7 +11501,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_NOACK_MAP,
 		.doit = nl80211_set_noack_map,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11509,7 +11509,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_START_P2P_DEVICE,
 		.doit = nl80211_start_p2p_device,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11517,7 +11517,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_STOP_P2P_DEVICE,
 		.doit = nl80211_stop_p2p_device,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11525,7 +11525,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_MCAST_RATE,
 		.doit = nl80211_set_mcast_rate,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11533,7 +11533,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_MAC_ACL,
 		.doit = nl80211_set_mac_acl,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11541,7 +11541,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_RADAR_DETECT,
 		.doit = nl80211_start_radar_detection,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11554,7 +11554,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_UPDATE_FT_IES,
 		.doit = nl80211_update_ft_ies,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11562,7 +11562,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_CRIT_PROTOCOL_START,
 		.doit = nl80211_crit_protocol_start,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11570,7 +11570,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
 		.doit = nl80211_crit_protocol_stop,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11585,7 +11585,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_COALESCE,
 		.doit = nl80211_set_coalesce,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11593,7 +11593,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_CHANNEL_SWITCH,
 		.doit = nl80211_channel_switch,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11602,7 +11602,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.doit = nl80211_vendor_cmd,
 		.dumpit = nl80211_vendor_cmd_dump,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_WIPHY |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11610,7 +11610,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_SET_QOS_MAP,
 		.doit = nl80211_set_qos_map,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11618,7 +11618,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_ADD_TX_TS,
 		.doit = nl80211_add_tx_ts,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11626,7 +11626,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_DEL_TX_TS,
 		.doit = nl80211_del_tx_ts,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11634,7 +11634,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
 		.doit = nl80211_tdls_channel_switch,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
@@ -11642,7 +11642,7 @@ static const struct genl_ops nl80211_ops[] = {
 		.cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
 		.doit = nl80211_tdls_cancel_channel_switch,
 		.policy = nl80211_policy,
-		.flags = GENL_ADMIN_PERM,
+		.flags = GENL_UNS_ADMIN_PERM,
 		.internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
 				  NL80211_FLAG_NEED_RTNL,
 	},
]

gemini-3-flash-preview

							input: 147322
							output: 658
							thoughts: 974
						

**Analysis of NL80211_CMD_TDLS_MGMT and User Namespace Capabilities**

Okay, so this commit confirms that the `GENL_UNS_ADMIN_PERM` flag was indeed introduced to allow wireless device administration from within non-initial user namespaces, provided the user has `CAP_NET_ADMIN` within that specific namespace. This directly addresses the previous limitations caused by `GENL_ADMIN_PERM`.

The commit message succinctly explains that, even though a `wiphy` (wireless physical interface) can be transferred to different network namespaces, an unprivileged process lacking `CAP_NET_ADMIN` within the initial user namespace couldn't administer these devices due to those restrictions. This patch essentially broadens privileged operations on `wiphy`, `dev`, or `wdev` objects to accommodate the new user namespace paradigm.

Therefore, the `NL80211_CMD_TDLS_MGMT` command *is* accessible to unprivileged users, but with the critical caveat that they must reside within a user namespace where they possess `CAP_NET_ADMIN`, and they must be operating on a wireless device contained within the corresponding network namespace.

In the root network namespace (which is tied to the initial user namespace), this still necessitates `CAP_NET_ADMIN` in the root user namespace.

So, here's the breakdown of how to answer the questions:

1.  **Is it accessible to unprivileged users?**
    *   In the initial user/network namespace: No, it inherently requires `CAP_NET_ADMIN`.
    *   In a user namespace created by an unprivileged user: Yes, because they inherently possess `CAP_NET_ADMIN` within that namespace.
2.  **Does it require `CAP_NET_ADMIN` in the user namespace?**
    *   Yes, specifically within the user namespace that owns the network namespace where the Netlink command is issued.

The information is sufficient for a comprehensive answer, but I want to make sure I cover everything. The user has mentioned `GENL_UNS_ADMIN_PERM`, so I have already confirmed that `NL80211_CMD_TDLS_MGMT` still has that in the latest codebase.

Now, let's explore any other *internal flags* that may impose further restrictions. Looking at it:
*   `NL80211_FLAG_NEED_NETDEV_UP` only requires the interface to be up.
*   `NL80211_FLAG_MLO_VALID_LINK_ID` is related to Multi-Link Operation, so it doesn't add any further capability requirements.

The function `nl80211_pre_doit` seems to handle these flags, and it calls `__cfg80211_wdev_from_attrs`. The latter uses `genl_info_net(info)`, which determines the network namespace in which the message originated. That in turn means `__cfg80211_wdev_from_attrs` will *only* locate devices present in that same network namespace.

So far, all the pieces fall into place.

I also have double-checked `netlink_ns_capable` to ensure that it does precisely what it is supposed to:
```c
 847:	bool __netlink_ns_capable(const struct netlink_skb_parms *nsp,
 848:				struct user_namespace *user_ns, int cap)
 849:	{
 850:		return ((nsp->flags & NETLINK_SKB_DST) ||
 851:			file_ns_capable(nsp->sk->sk_socket->file, user_ns, cap)) &&
 852:			ns_capable(user_ns, cap);
 853:	}
```

The function `ns_capable(user_ns, cap)` checks if the current process has `cap` in `user_ns`. If the user has created the user namespace, they will automatically possess all capabilities within it.

So, the definitive conclusion is that an unprivileged user can indeed invoke this command if they take advantage of user namespaces.

Therefore, the final answer to formulate will be:

*   `NL80211_CMD_TDLS_MGMT` is flagged with `GENL_UNS_ADMIN_PERM`.
*   `GENL_UNS_ADMIN_PERM` necessitates `CAP_NET_ADMIN` in the user namespace that is the parent of the network namespace where the Netlink command is executed.
*   This means an unprivileged user *in* the initial user namespace cannot use it directly.
*   However, an

gemini-3.1-pro-preview

							input: 88573
							output: 352
							thoughts: 0
						

map[Question:What is the impact of the bug? It is a WARNING in ieee80211_tdls_add_setup_cfm_ies.
The warning is:
!sta || !ap_sta
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_setup_cfm_ies net/mac80211/tdls.c:611 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_ies net/mac80211/tdls.c:762 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_build_mgmt_packet_data+0x2ea1/0x4050 net/mac80211/tdls.c:984, CPU#0: syz.0.596/6699

If the warning is triggered, does it lead to memory corruption, denial of service, or is it just a benign warning?
Look at the code of ieee80211_tdls_add_setup_cfm_ies and see what happens after the warning.]

map[Answer:The `WARNING` in `ieee80211_tdls_add_setup_cfm_ies` (at `net/mac80211/tdls.c:611`) is triggered when the kernel attempts to build a TDLS (Tunneled Direct Link Setup) Setup Confirm packet but cannot find the station information (`sta_info`) for either the TDLS peer or the Access Point (AP) it is associated with.

### Impact Analysis

1.  **Memory Corruption**: **No.** The code specifically checks for the NULL condition and returns early:
    ```c
    611:    if (WARN_ON_ONCE(!sta || !ap_sta))
    612:            return;
    ```
    This early return prevents the subsequent code from dereferencing `sta` or `ap_sta`. For example, it avoids the NULL pointer dereference at line 614 (`sta->tdls_chandef = ...`) and line 653 (`if (!ap_sta->sta.deflink...`).

2.  **Denial of Service (DoS)**: **Partial.**
    *   If the kernel is configured with `panic_on_warn=1` (which is common in some security-hardened environments or during automated testing like syzbot), the system will panic and reboot/halt when this warning is triggered. Since this path is reachable from userspace via the `NL80211_CMD_TDLS_MGMT` command, a local user could potentially crash the system.
    *   If `panic_on_warn` is **not** set, the system does not crash. The only "service" denied is the TDLS setup itself, which would have failed anyway given the missing station information.

3.  **Benign Warning**: **Mostly.** In a standard production kernel configuration, this is a benign warning that prints a stack trace to the kernel log (`dmesg`). It indicates an inconsistent state (e.g., trying to confirm a TDLS setup with a peer that is no longer in the station table), but the kernel handles it gracefully by aborting the packet construction.

### What happens after the warning?

When the warning is triggered, `ieee80211_tdls_add_setup_cfm_ies` returns immediately. The calling function, `ieee80211_tdls_add_ies`, then finishes its execution. The packet construction continues in `ieee80211_tdls_build_mgmt_packet_data`, which returns the partially constructed `sk_buff` (containing only the TDLS headers but missing all Information Elements like Link ID, QoS, HT/VHT capabilities). This truncated packet is then passed to the transmission path and sent out. The peer receiving such a truncated TDLS Setup Confirm packet will likely ignore it or respond with an error, effectively failing the TDLS link establishment.

### Conclusion

The bug is primarily a **correctness and logging issue**. Userspace should not be able to trigger a `WARN_ON` in the kernel. The fix would involve replacing the `WARN_ON_ONCE` with a silent error return or a debug print, as the condition (missing `sta_info`) can occur due to races or invalid userspace input and is already handled safely by the code.]

gemini-3-flash-preview

You are a capable Linux kernel developer tasked with researching complex questions
about kernel source code. You will be given a concrete question, and need to provide
a concrete answer.
Use tools extensively while researching the question. Don't make assumptions,
or rely on your previous knowledge about the kernel source code, use available tools
to access the actual source code.
Use all available sources of information:
 - kernel source code
 - documentation in the Documentation dir in the source tree
 - git commits descriptions, git blame

Prefer calling several tools at the same time to save round-trips.

What is the impact of the bug? It is a WARNING in ieee80211_tdls_add_setup_cfm_ies.
The warning is:
!sta || !ap_sta
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_setup_cfm_ies net/mac80211/tdls.c:611 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_ies net/mac80211/tdls.c:762 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_build_mgmt_packet_data+0x2ea1/0x4050 net/mac80211/tdls.c:984, CPU#0: syz.0.596/6699

If the warning is triggered, does it lead to memory corruption, denial of service, or is it just a benign warning?
Look at the code of ieee80211_tdls_add_setup_cfm_ies and see what happens after the warning.

The `WARNING` in `ieee80211_tdls_add_setup_cfm_ies` (at `net/mac80211/tdls.c:611`) is triggered when the kernel attempts to build a TDLS (Tunneled Direct Link Setup) Setup Confirm packet but cannot find the station information (`sta_info`) for either the TDLS peer or the Access Point (AP) it is associated with.

### Impact Analysis

1.  **Memory Corruption**: **No.** The code specifically checks for the NULL condition and returns early:
    ```c
    611:    if (WARN_ON_ONCE(!sta || !ap_sta))
    612:            return;
    ```
    This early return prevents the subsequent code from dereferencing `sta` or `ap_sta`. For example, it avoids the NULL pointer dereference at line 614 (`sta->tdls_chandef = ...`) and line 653 (`if (!ap_sta->sta.deflink...`).

2.  **Denial of Service (DoS)**: **Partial.**
    *   If the kernel is configured with `panic_on_warn=1` (which is common in some security-hardened environments or during automated testing like syzbot), the system will panic and reboot/halt when this warning is triggered. Since this path is reachable from userspace via the `NL80211_CMD_TDLS_MGMT` command, a local user could potentially crash the system.
    *   If `panic_on_warn` is **not** set, the system does not crash. The only "service" denied is the TDLS setup itself, which would have failed anyway given the missing station information.

3.  **Benign Warning**: **Mostly.** In a standard production kernel configuration, this is a benign warning that prints a stack trace to the kernel log (`dmesg`). It indicates an inconsistent state (e.g., trying to confirm a TDLS setup with a peer that is no longer in the station table), but the kernel handles it gracefully by aborting the packet construction.

### What happens after the warning?

When the warning is triggered, `ieee80211_tdls_add_setup_cfm_ies` returns immediately. The calling function, `ieee80211_tdls_add_ies`, then finishes its execution. The packet construction continues in `ieee80211_tdls_build_mgmt_packet_data`, which returns the partially constructed `sk_buff` (containing only the TDLS headers but missing all Information Elements like Link ID, QoS, HT/VHT capabilities). This truncated packet is then passed to the transmission path and sent out. The peer receiving such a truncated TDLS Setup Confirm packet will likely ignore it or respond with an error, effectively failing the TDLS link establishment.

### Conclusion

The bug is primarily a **correctness and logging issue**. Userspace should not be able to trigger a `WARN_ON` in the kernel. The fix would involve replacing the `WARN_ON_ONCE` with a silent error return or a debug print, as the condition (missing `sta_info`) can occur due to races or invalid userspace input and is already handled safely by the code.

gemini-3-flash-preview

							input: 3534
							output: 60
							thoughts: 130
						

**Analyzing a Potential Vulnerability in TDLS Setup**

Okay, so the user's raising a flag about a `WARNING` within `ieee80211_tdls_add_setup_cfm_ies` in the `net/mac80211/tdls.c` module. I need to get to the bottom of this. The warning condition itself is pretty straightforward: it's triggered when either `sta` or `ap_sta` are null. Obviously, this is undesirable during the confirmation of a TDLS setup, suggesting that the station or access point association isn't properly established or has been somehow corrupted at this point in the process.

My immediate focus is on understanding the implications if this `!sta || !ap_sta` condition is encountered. I need to know: what's the control flow? What other code paths are impacted? Does this lead to a crash, a security vulnerability, or just a graceful fallback? What data structures are involved? Are we leaking information? Are we skipping critical security checks?

First things first, I'm diving into `net/mac80211/tdls.c` to examine `ieee80211_tdls_add_setup_cfm_ies` itself. I need to understand its exact context. And then, I need to trace its callers. I'll meticulously follow the execution path to see how the code handles the situation when either `sta` or `ap_sta` are not valid. I'll keep an eye out for potential races or use-after-free scenarios. This kind of warning often points to a synchronization issue, an unchecked pointer dereference, or an improper state management.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_setup_cfm_ies]

map[SourceCode: 591:	static void
 592:	ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
 593:					 struct sk_buff *skb, const u8 *peer,
 594:					 bool initiator, const u8 *extra_ies,
 595:					 size_t extra_ies_len)
 596:	{
 597:		struct ieee80211_sub_if_data *sdata = link->sdata;
 598:		struct ieee80211_local *local = sdata->local;
 599:		size_t offset = 0, noffset;
 600:		struct sta_info *sta, *ap_sta;
 601:		struct ieee80211_supported_band *sband;
 602:		u8 *pos;
 603:	
 604:		sband = ieee80211_get_link_sband(link);
 605:		if (WARN_ON_ONCE(!sband))
 606:			return;
 607:	
 608:		sta = sta_info_get(sdata, peer);
 609:		ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
 610:	
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
 612:			return;
 613:	
 614:		sta->tdls_chandef = link->conf->chanreq.oper;
 615:	
 616:		/* add any custom IEs that go before the QoS IE */
 617:		if (extra_ies_len) {
 618:			static const u8 before_qos[] = {
 619:				WLAN_EID_RSN,
 620:			};
 621:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 622:						     before_qos,
 623:						     ARRAY_SIZE(before_qos),
 624:						     offset);
 625:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 626:			offset = noffset;
 627:		}
 628:	
 629:		/* add the QoS param IE if both the peer and we support it */
 630:		if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
 631:			ieee80211_tdls_add_wmm_param_ie(sdata, skb);
 632:	
 633:		/* add any custom IEs that go before HT operation */
 634:		if (extra_ies_len) {
 635:			static const u8 before_ht_op[] = {
 636:				WLAN_EID_RSN,
 637:				WLAN_EID_QOS_CAPA,
 638:				WLAN_EID_FAST_BSS_TRANSITION,
 639:				WLAN_EID_TIMEOUT_INTERVAL,
 640:			};
 641:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 642:						     before_ht_op,
 643:						     ARRAY_SIZE(before_ht_op),
 644:						     offset);
 645:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 646:			offset = noffset;
 647:		}
 648:	
 649:		/*
 650:		 * if HT support is only added in TDLS, we need an HT-operation IE.
 651:		 * add the IE as required by IEEE802.11-2012 9.23.3.2.
 652:		 */
 653:		if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
 654:			u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
 655:				   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
 656:				   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
 657:	
 658:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
 659:			ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
 660:						   &link->conf->chanreq.oper, prot,
 661:						   true);
 662:		}
 663:	
 664:		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 665:	
 666:		/* only include VHT-operation if not on the 2.4GHz band */
 667:		if (sband->band != NL80211_BAND_2GHZ &&
 668:		    sta->sta.deflink.vht_cap.vht_supported) {
 669:			/*
 670:			 * if both peers support WIDER_BW, we can expand the chandef to
 671:			 * a wider compatible one, up to 80MHz
 672:			 */
 673:			if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 674:				ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 675:	
 676:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
 677:			ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
 678:						    &sta->tdls_chandef);
 679:		}
 680:	
 681:		/* add any remaining IEs */
 682:		if (extra_ies_len) {
 683:			noffset = extra_ies_len;
 684:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 685:		}
 686:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 5905
							output: 56
							thoughts: 125
						

**My Analysis of a TDLS Setup Confirmation Function**

Okay, so I'm looking at this `ieee80211_tdls_add_setup_cfm_ies` function, and the very first thing I see is this guard: lines 611 and 612. It's a pretty standard check, using `WARN_ON_ONCE` which is a good defensive programming practice, but the core of the check is simple: if either `sta` or `ap_sta` are NULL, the function bails out. No big surprises there.

But wait, what's the implication of returning early? Well, it means some Information Elements, or IEs, won't be added to the `skb`. That's where things get interesting. Missing IEs could cause issues, perhaps preventing successful TDLS setup. It would be worth investigating the specific IEs that are missed in those cases. The impact could range from minor inefficiencies to complete failure of the TDLS handshake.

The caller is `ieee80211_tdls_add_ies`, so the next logical step is to dive into that function and understand its role and how `ieee80211_tdls_add_setup_cfm_ies` fits into the broader picture.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_ies]

map[SourceCode: 741:	static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
 742:					   struct sk_buff *skb, const u8 *peer,
 743:					   u8 action_code, u16 status_code,
 744:					   bool initiator, const u8 *extra_ies,
 745:					   size_t extra_ies_len, u8 oper_class,
 746:					   struct cfg80211_chan_def *chandef)
 747:	{
 748:		switch (action_code) {
 749:		case WLAN_TDLS_SETUP_REQUEST:
 750:		case WLAN_TDLS_SETUP_RESPONSE:
 751:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 752:			if (status_code == 0)
 753:				ieee80211_tdls_add_setup_start_ies(link,
 754:								   skb, peer,
 755:								   action_code,
 756:								   initiator,
 757:								   extra_ies,
 758:								   extra_ies_len);
 759:			break;
 760:		case WLAN_TDLS_SETUP_CONFIRM:
 761:			if (status_code == 0)
 762:				ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
 763:								 initiator, extra_ies,
 764:								 extra_ies_len);
 765:			break;
 766:		case WLAN_TDLS_TEARDOWN:
 767:		case WLAN_TDLS_DISCOVERY_REQUEST:
 768:			if (extra_ies_len)
 769:				skb_put_data(skb, extra_ies, extra_ies_len);
 770:			if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
 771:				ieee80211_tdls_add_link_ie(link, skb,
 772:							   peer, initiator);
 773:			break;
 774:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 775:			ieee80211_tdls_add_chan_switch_req_ies(link, skb, peer,
 776:							       initiator, extra_ies,
 777:							       extra_ies_len,
 778:							       oper_class, chandef);
 779:			break;
 780:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 781:			ieee80211_tdls_add_chan_switch_resp_ies(link, skb, peer,
 782:								status_code,
 783:								initiator, extra_ies,
 784:								extra_ies_len);
 785:			break;
 786:		}
 787:	
 788:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 7229
							output: 60
							thoughts: 40
						

Okay, here's my interpretation of those thoughts, summarized from my perspective as an expert in the field:

**Decoding the TDLS Implementation**

Alright, let me break this down. It appears that `ieee80211_tdls_add_ies` is being invoked by the function `ieee80211_tdls_build_mgmt_packet_data`. This immediately suggests a specific part of the TDLS (Tunneled Direct Link Setup) process, specifically within the realm of building management frames. The fact that we're talking about "IES" – Information Elements – implies that we are constructing a frame containing specific TDLS parameters, potentially related to capabilities, discovery, or perhaps the setup of the direct link itself. My intuition tells me that this has something to do with the exchange of capability information. I suspect this function constructs a management frame for TDLS, and then includes the IEs that contain the information needed for direct link negotiation or establishment. Knowing the structure of the IEEE 802.11 standard, and my experience with TDLS, this makes perfect sense. I now need to look at what `ieee80211_tdls_add_ies` does with the IEs, and what management frame is being built.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_build_mgmt_packet_data]

map[SourceCode: 908:	static struct sk_buff *
 909:	ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 910:					      const u8 *peer, int link_id,
 911:					      u8 action_code, u8 dialog_token,
 912:					      u16 status_code, bool initiator,
 913:					      const u8 *extra_ies, size_t extra_ies_len,
 914:					      u8 oper_class,
 915:					      struct cfg80211_chan_def *chandef)
 916:	{
 917:		struct ieee80211_local *local = sdata->local;
 918:		struct sk_buff *skb;
 919:		int ret;
 920:		struct ieee80211_link_data *link;
 921:	
 922:		link_id = link_id >= 0 ? link_id : 0;
 923:		rcu_read_lock();
 924:		link = rcu_dereference(sdata->link[link_id]);
 925:		if (WARN_ON(!link))
 926:			goto unlock;
 927:	
 928:		skb = netdev_alloc_skb(sdata->dev,
 929:				       local->hw.extra_tx_headroom +
 930:				       max(sizeof(struct ieee80211_mgmt),
 931:					   sizeof(struct ieee80211_tdls_data)) +
 932:				       50 + /* supported rates */
 933:				       10 + /* ext capab */
 934:				       26 + /* max(WMM-info, WMM-param) */
 935:				       2 + max(sizeof(struct ieee80211_ht_cap),
 936:					       sizeof(struct ieee80211_ht_operation)) +
 937:				       2 + max(sizeof(struct ieee80211_vht_cap),
 938:					       sizeof(struct ieee80211_vht_operation)) +
 939:				       2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
 940:					       sizeof(struct ieee80211_he_mcs_nss_supp) +
 941:					       IEEE80211_HE_PPE_THRES_MAX_LEN +
 942:				       2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
 943:				       2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
 944:					       sizeof(struct ieee80211_eht_mcs_nss_supp) +
 945:					       IEEE80211_EHT_PPE_THRES_MAX_LEN +
 946:				       50 + /* supported channels */
 947:				       3 + /* 40/20 BSS coex */
 948:				       4 + /* AID */
 949:				       4 + /* oper classes */
 950:				       extra_ies_len +
 951:				       sizeof(struct ieee80211_tdls_lnkie));
 952:		if (!skb)
 953:			goto unlock;
 954:	
 955:		skb_reserve(skb, local->hw.extra_tx_headroom);
 956:	
 957:		switch (action_code) {
 958:		case WLAN_TDLS_SETUP_REQUEST:
 959:		case WLAN_TDLS_SETUP_RESPONSE:
 960:		case WLAN_TDLS_SETUP_CONFIRM:
 961:		case WLAN_TDLS_TEARDOWN:
 962:		case WLAN_TDLS_DISCOVERY_REQUEST:
 963:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 964:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 965:			ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
 966:							     sdata->dev, link, peer,
 967:							     action_code, dialog_token,
 968:							     status_code, skb);
 969:			break;
 970:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 971:			ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
 972:							 peer, link, action_code,
 973:							 dialog_token, status_code,
 974:							 skb);
 975:			break;
 976:		default:
 977:			ret = -EOPNOTSUPP;
 978:			break;
 979:		}
 980:	
 981:		if (ret < 0)
 982:			goto fail;
 983:	
 984:		ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
 985:				       initiator, extra_ies, extra_ies_len, oper_class,
 986:				       chandef);
 987:		rcu_read_unlock();
 988:		return skb;
 989:	
 990:	fail:
 991:		dev_kfree_skb(skb);
 992:	unlock:
 993:		rcu_read_unlock();
 994:		return NULL;
 995:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 9207
							output: 59
							thoughts: 146
						

**Analyzing the TDLS Frame Preparation**

Okay, so if `ieee80211_tdls_add_setup_cfm_ies` bails out prematurely, then `ieee80211_tdls_add_ies` also wraps up, and we're left with `ieee80211_tdls_build_mgmt_packet_data` just returning the `skb` as it is. That's fine, but let's make sure we understand *why* it might bail. The critical point is the `skb` itself. We know it was either prepared by `ieee80211_prep_tdls_encap_data` or `ieee80211_prep_tdls_direct`, which is the likely source of any issues. It makes sense to zero in on what `ieee80211_prep_tdls_encap_data` does. Knowing how that `skb` gets built is going to be key to debugging any potential anomalies in the resulting frame. Let me dive into that function and trace the data flow.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_prep_tdls_encap_data]

map[SourceCode: 790:	static int
 791:	ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 792:				       struct ieee80211_link_data *link,
 793:				       const u8 *peer, u8 action_code, u8 dialog_token,
 794:				       u16 status_code, struct sk_buff *skb)
 795:	{
 796:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 797:		struct ieee80211_tdls_data *tf;
 798:	
 799:		tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
 800:	
 801:		memcpy(tf->da, peer, ETH_ALEN);
 802:		memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
 803:		tf->ether_type = cpu_to_be16(ETH_P_TDLS);
 804:		tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
 805:	
 806:		/* network header is after the ethernet header */
 807:		skb_set_network_header(skb, ETH_HLEN);
 808:	
 809:		switch (action_code) {
 810:		case WLAN_TDLS_SETUP_REQUEST:
 811:			tf->category = WLAN_CATEGORY_TDLS;
 812:			tf->action_code = WLAN_TDLS_SETUP_REQUEST;
 813:	
 814:			skb_put(skb, sizeof(tf->u.setup_req));
 815:			tf->u.setup_req.dialog_token = dialog_token;
 816:			tf->u.setup_req.capability =
 817:				cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 818:									 status_code));
 819:			break;
 820:		case WLAN_TDLS_SETUP_RESPONSE:
 821:			tf->category = WLAN_CATEGORY_TDLS;
 822:			tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
 823:	
 824:			skb_put(skb, sizeof(tf->u.setup_resp));
 825:			tf->u.setup_resp.status_code = cpu_to_le16(status_code);
 826:			tf->u.setup_resp.dialog_token = dialog_token;
 827:			tf->u.setup_resp.capability =
 828:				cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 829:									 status_code));
 830:			break;
 831:		case WLAN_TDLS_SETUP_CONFIRM:
 832:			tf->category = WLAN_CATEGORY_TDLS;
 833:			tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
 834:	
 835:			skb_put(skb, sizeof(tf->u.setup_cfm));
 836:			tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
 837:			tf->u.setup_cfm.dialog_token = dialog_token;
 838:			break;
 839:		case WLAN_TDLS_TEARDOWN:
 840:			tf->category = WLAN_CATEGORY_TDLS;
 841:			tf->action_code = WLAN_TDLS_TEARDOWN;
 842:	
 843:			skb_put(skb, sizeof(tf->u.teardown));
 844:			tf->u.teardown.reason_code = cpu_to_le16(status_code);
 845:			break;
 846:		case WLAN_TDLS_DISCOVERY_REQUEST:
 847:			tf->category = WLAN_CATEGORY_TDLS;
 848:			tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
 849:	
 850:			skb_put(skb, sizeof(tf->u.discover_req));
 851:			tf->u.discover_req.dialog_token = dialog_token;
 852:			break;
 853:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 854:			tf->category = WLAN_CATEGORY_TDLS;
 855:			tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
 856:	
 857:			skb_put(skb, sizeof(tf->u.chan_switch_req));
 858:			break;
 859:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 860:			tf->category = WLAN_CATEGORY_TDLS;
 861:			tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
 862:	
 863:			skb_put(skb, sizeof(tf->u.chan_switch_resp));
 864:			tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
 865:			break;
 866:		default:
 867:			return -EINVAL;
 868:		}
 869:	
 870:		return 0;
 871:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 11203
							output: 48
							thoughts: 477
						

**Analyzing a Potential Vulnerability in TDLS Setup Confirmation**

Okay, so I'm digging into this `ieee80211_tdls_add_setup_cfm_ies` function and I see a potential issue. If it returns early, a `WLAN_TDLS_SETUP_CONFIRM` packet goes out, but it's missing crucial Information Elements (IEs). Specifically, it skips appending `extra_ies`, WMM parameters, HT operation, Link IE, and VHT operation IEs. This is a bit concerning.

My immediate question is, "Is this actually dangerous?" It seems the early return is there to protect against further execution if we end up with a NULL `sta` or `ap_sta` (which could cause a crash later on in the execution). The code that is being skipped includes assigning a channel definition to `sta->tdls_chandef`. We also skip comparing HT capabilities on lines using `ap_sta`. The warning that triggers is based on `!sta || !ap_sta`.

`sta` comes from `sta_info_get(sdata, peer)`, and `ap_sta` comes from `sta_info_get(sdata, sdata->vif.cfg.ap_addr)`. So, if either is NULL, it means the target station (or the AP) isn't in our station list, at least not in a way we can directly access it.

Now, if the function *does* return early, we only send a partially populated packet, but does this lead to something bad, like memory corruption or a denial-of-service? Looking at the code again, it seems the early return actually *prevents* dereferencing `sta` or `ap_sta` when they're NULL. So it’s *avoiding* a NULL pointer dereference, which is good. That would be a crash/DoS. But it’s still sending this partially populated packet.

The warning itself, being `WARN_ON_ONCE`, is helpful in identifying the problem but may not be enough. If there's an early return, and all we do is send an incomplete packet, is the worst that can happen just a dropped connection? Or could it lead to a more subtle issue, perhaps leaving the system in an inconsistent state? I need to look into this more deeply. I should probably focus on how `sta_info_get` actually works.

map[ContextFile:net/mac80211/sta_info.h IncludeLines:true Name:sta_info_get]

map[SourceCode: 202:	/* protected by RCU */
 203:	struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
 204:				      const u8 *addr)
 205:	{
 206:		struct ieee80211_local *local = sdata->local;
 207:		struct rhlist_head *tmp;
 208:		struct sta_info *sta;
 209:	
 210:		rcu_read_lock();
 211:		for_each_sta_info(local, addr, sta, tmp) {
 212:			if (sta->sdata == sdata) {
 213:				rcu_read_unlock();
 214:				/* this is safe as the caller must already hold
 215:				 * another rcu read section or the mutex
 216:				 */
 217:				return sta;
 218:			}
 219:		}
 220:		rcu_read_unlock();
 221:		return NULL;
 222:	}
 SourceFile:net/mac80211/sta_info.c]

gemini-3-flash-preview

							input: 12582
							output: 36
							thoughts: 474
						

**Analyzing a Potential TDLS Setup Confirmation Issue**

Okay, so I'm looking at this `ieee80211_tdls_add_setup_cfm_ies` function. The first thing that jumps out is that it uses `sta_info_get()` which, of course, returns NULL if the STA isn't found. The code explicitly checks for this in lines 611 and then returns.

The immediate memory safety concern is addressed by the early return. No NULL pointer dereference, good. But is there a functional consequence here? The immediate thought is that an incomplete packet will be sent. The receiving peer might get confused or the TDLS setup could fail. It's not a kernel-level bug, such as data corruption or a denial of service on the local machine.

Ah, but the syzbot report is crucial: `WARNING: net/mac80211/tdls.c:611`. This suggests the warning *is* being triggered. Line 611 means we're trying to send a TDLS Setup Confirm to a peer without a `sta_info`, or we're not associated with an AP and don't have its `sta_info`.

This is a TDLS context, so two stations should be linked via the same AP. Logically, we *should* have `sta_info` for both the AP and the TDLS peer. If `sta` is NULL, the peer STA isn't in our station table. If `ap_sta` is NULL, the AP isn't. Given that we're supposedly in the middle of sending a TDLS Setup Confirm, both of those should be valid.

So the next step is to trace back, find the callers of `ieee80211_tdls_build_mgmt_packet_data` and find where `ieee80211_tdls_add_setup_cfm_ies` is being called. Let's see how we got into this state.

map[Name:ieee80211_tdls_build_mgmt_packet_data]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_ch_sw_resp_tmpl_get SourceFile:net/mac80211/tdls.c SourceLine:1712] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_ch_sw_tmpl_get SourceFile:net/mac80211/tdls.c SourceLine:1587] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_prep_mgmt_packet SourceFile:net/mac80211/tdls.c SourceLine:1058]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 13750
							output: 58
							thoughts: 21
						

Here's my summary, as if I were thinking these thoughts:

**Analyzing Potential TDLS Management Packet Preparation**

Okay, so I'm looking at this function name, `ieee80211_tdls_prep_mgmt_packet`. Hmm, that sounds like it could be exactly what I need. It seems highly likely that this is the function responsible for preparing the management packets related to Tunnel Direct Link Setup (TDLS). This is a critical piece, and likely will hold the key to understanding the underlying mechanism.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_prep_mgmt_packet]

map[SourceCode: 997:	static int
 998:	ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 999:					const u8 *peer, int link_id,
1000:					u8 action_code, u8 dialog_token,
1001:					u16 status_code, u32 peer_capability,
1002:					bool initiator, const u8 *extra_ies,
1003:					size_t extra_ies_len, u8 oper_class,
1004:					struct cfg80211_chan_def *chandef)
1005:	{
1006:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007:		struct sk_buff *skb = NULL;
1008:		struct sta_info *sta;
1009:		u32 flags = 0;
1010:		int ret = 0;
1011:	
1012:		rcu_read_lock();
1013:		sta = sta_info_get(sdata, peer);
1014:	
1015:		/* infer the initiator if we can, to support old userspace */
1016:		switch (action_code) {
1017:		case WLAN_TDLS_SETUP_REQUEST:
1018:			if (sta) {
1019:				set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
1020:				sta->sta.tdls_initiator = false;
1021:			}
1022:			fallthrough;
1023:		case WLAN_TDLS_SETUP_CONFIRM:
1024:		case WLAN_TDLS_DISCOVERY_REQUEST:
1025:			initiator = true;
1026:			break;
1027:		case WLAN_TDLS_SETUP_RESPONSE:
1028:			/*
1029:			 * In some testing scenarios, we send a request and response.
1030:			 * Make the last packet sent take effect for the initiator
1031:			 * value.
1032:			 */
1033:			if (sta) {
1034:				clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
1035:				sta->sta.tdls_initiator = true;
1036:			}
1037:			fallthrough;
1038:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1039:			initiator = false;
1040:			break;
1041:		case WLAN_TDLS_TEARDOWN:
1042:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
1043:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
1044:			/* any value is ok */
1045:			break;
1046:		default:
1047:			ret = -EOPNOTSUPP;
1048:			break;
1049:		}
1050:	
1051:		if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
1052:			initiator = true;
1053:	
1054:		rcu_read_unlock();
1055:		if (ret < 0)
1056:			goto fail;
1057:	
1058:		skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
1059:							    link_id, action_code,
1060:							    dialog_token, status_code,
1061:							    initiator, extra_ies,
1062:							    extra_ies_len, oper_class,
1063:							    chandef);
1064:		if (!skb) {
1065:			ret = -EINVAL;
1066:			goto fail;
1067:		}
1068:	
1069:		if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
1070:			ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
1071:			return 0;
1072:		}
1073:	
1074:		/*
1075:		 * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
1076:		 * we should default to AC_VI.
1077:		 */
1078:		switch (action_code) {
1079:		case WLAN_TDLS_SETUP_REQUEST:
1080:		case WLAN_TDLS_SETUP_RESPONSE:
1081:			skb->priority = 256 + 2;
1082:			break;
1083:		default:
1084:			skb->priority = 256 + 5;
1085:			break;
1086:		}
1087:	
1088:		/*
1089:		 * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress.
1090:		 * Later, if no ACK is returned from peer, we will re-send the teardown
1091:		 * packet through the AP.
1092:		 */
1093:		if ((action_code == WLAN_TDLS_TEARDOWN) &&
1094:		    ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
1095:			bool try_resend; /* Should we keep skb for possible resend */
1096:	
1097:			/* If not sending directly to peer - no point in keeping skb */
1098:			rcu_read_lock();
1099:			sta = sta_info_get(sdata, peer);
1100:			try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
1101:			rcu_read_unlock();
1102:	
1103:			spin_lock_bh(&sdata->u.mgd.teardown_lock);
1104:			if (try_resend && !sdata->u.mgd.teardown_skb) {
1105:				/* Mark it as requiring TX status callback  */
1106:				flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1107:					 IEEE80211_TX_INTFL_MLME_CONN_TX;
1108:	
1109:				/*
1110:				 * skb is copied since mac80211 will later set
1111:				 * properties that might not be the same as the AP,
1112:				 * such as encryption, QoS, addresses, etc.
1113:				 *
1114:				 * No problem if skb_copy() fails, so no need to check.
1115:				 */
1116:				sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC);
1117:				sdata->u.mgd.orig_teardown_skb = skb;
1118:			}
1119:			spin_unlock_bh(&sdata->u.mgd.teardown_lock);
1120:		}
1121:	
1122:		/* disable bottom halves when entering the Tx path */
1123:		local_bh_disable();
1124:		__ieee80211_subif_start_xmit(skb, dev, flags,
1125:					     IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
1126:		local_bh_enable();
1127:	
1128:		return ret;
1129:	
1130:	fail:
1131:		dev_kfree_skb(skb);
1132:		return ret;
1133:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 16155
							output: 34
							thoughts: 41
						

Here's my take on the thought process, as if it were my own:

**Analyzing the TDLS Management Packet Preparation**

Okay, so I'm tracing the execution path here. I've got `ieee80211_tdls_prep_mgmt_packet` in front of me, and it looks like it's being called from `cfg80211_tdls_mgmt`. Right, that makes sense. We're dealing with TDLS (Tunneled Direct Link Setup) management frames. Let's dig in and see *exactly* how this preparation is happening within the cfg80211 framework. I need to understand the interaction between the generic wireless configuration layer and the more specific 802.11 implementation at this point. Time to examine the code flow and the data structures involved. Let's see how the packet is being built.

map[Name:ieee80211_tdls_prep_mgmt_packet]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt SourceFile:net/mac80211/tdls.c SourceLine:1299] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt_setup SourceFile:net/mac80211/tdls.c SourceLine:1186] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt_teardown SourceFile:net/mac80211/tdls.c SourceLine:1229]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 16636
							output: 54
							thoughts: 19
						

Here's my thought process, as if I were considering that code:

**Checking `ieee80211_tdls_mgmt` - Let's Dig In**

Okay, first things first, let's take a look at `ieee80211_tdls_mgmt`. This function (or perhaps a data structure, given the name, it's hard to tell without context) is likely critical for managing TDLS (Tunneled Direct Link Setup) operations within the 802.11 standard. Immediately, my mind is racing through the implications. I'm wondering if this is a driver-level implementation, a higher-level abstraction, or something in-between. The naming convention suggests it’s specifically tied to the management aspect – how TDLS links are initiated, maintained, and torn down.

I need to understand its role in the overall TDLS protocol. What specific aspects of the TDLS process does it handle? Does it deal with key exchange, association requests, discovery frames, or the actual data tunnelling? Does it interface with the hardware directly, or is it an intermediary? Is this a complete implementation, or only a portion of the TDLS system?

I'm thinking about the potential pitfalls here. Security is paramount with TDLS, so I'll be looking closely at any crypto functions, key derivation routines, and access control mechanisms. I need to see how the implementation deals with potential vulnerabilities like replay attacks, man-in-the-middle attacks, and key management issues.

From an efficiency perspective, I'll be assessing its performance characteristics. Does it handle frame aggregation efficiently? How about power management? Does it impact overall throughput? Is it optimized for various hardware platforms? I have to consider the potential for fragmentation and reassembly overhead, and how that impacts latency and bandwidth.

Ultimately, I want to understand how robust and reliable this implementation is. What are the error handling mechanisms? Are there any known issues or limitations? Is it compliant with the latest 802.11 standards and revisions? I need to think about how this relates to other 802.11 management functions.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_mgmt]

map[SourceCode:1255:	int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
1256:				const u8 *peer, int link_id,
1257:				u8 action_code, u8 dialog_token, u16 status_code,
1258:				u32 peer_capability, bool initiator,
1259:				const u8 *extra_ies, size_t extra_ies_len)
1260:	{
1261:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1262:		int ret;
1263:	
1264:		if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
1265:			return -EOPNOTSUPP;
1266:	
1267:		/* make sure we are in managed mode, and associated */
1268:		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1269:		    !sdata->u.mgd.associated)
1270:			return -EINVAL;
1271:	
1272:		switch (action_code) {
1273:		case WLAN_TDLS_SETUP_REQUEST:
1274:		case WLAN_TDLS_SETUP_RESPONSE:
1275:			ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
1276:							link_id, action_code,
1277:							dialog_token, status_code,
1278:							peer_capability, initiator,
1279:							extra_ies, extra_ies_len);
1280:			break;
1281:		case WLAN_TDLS_TEARDOWN:
1282:			ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
1283:							   action_code, dialog_token,
1284:							   status_code,
1285:							   peer_capability, initiator,
1286:							   extra_ies, extra_ies_len);
1287:			break;
1288:		case WLAN_TDLS_DISCOVERY_REQUEST:
1289:			/*
1290:			 * Protect the discovery so we can hear the TDLS discovery
1291:			 * response frame. It is transmitted directly and not buffered
1292:			 * by the AP.
1293:			 */
1294:			drv_mgd_protect_tdls_discover(sdata->local, sdata, link_id);
1295:			fallthrough;
1296:		case WLAN_TDLS_SETUP_CONFIRM:
1297:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1298:			/* no special handling */
1299:			ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
1300:							      link_id, action_code,
1301:							      dialog_token,
1302:							      status_code,
1303:							      peer_capability,
1304:							      initiator, extra_ies,
1305:							      extra_ies_len, 0, NULL);
1306:			break;
1307:		default:
1308:			ret = -EOPNOTSUPP;
1309:			break;
1310:		}
1311:	
1312:		tdls_dbg(sdata, "TDLS mgmt action %d peer %pM link_id %d status %d\n",
1313:			 action_code, peer, link_id, ret);
1314:		return ret;
1315:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 18216
							output: 60
							thoughts: 694
						

**TDLS Management: Investigating Potential NULL Pointer Dereferences**

Okay, let's break this down. In `ieee80211_tdls_mgmt`, specifically, lines 1268-1270, we see a check ensuring we're a station and associated. If we are, it *should* mean `ap_sta` is valid. The critical piece is the lookup of `ap_sta` based on `sdata->vif.cfg.ap_addr`. My immediate concern is what happens if that address is wrong, or if the associated STA entry has been, for some reason, removed. Then `ap_sta` could be NULL. The code also looks up the "peer" `sta`, which similarly could be NULL.

The `WARN_ON_ONCE` construct on line 611 has me on alert.  If either `sta` or `ap_sta` are NULL, we get a warning and then we *return*. That return is crucial, because lines 614 and following use `sta` and `ap_sta`. If we *didn't* return, `sta->tdls_chandef` would be a NULL dereference.  Also, on line 653 the code checks a HT capability on `ap_sta`. The early return prevents that, too. So it *seems* the warning and return are effectively protecting us from memory corruption via NULL pointer dereference, which is good.

But, I need to be *absolutely* sure. The warning is specifically within `ieee80211_tdls_add_setup_cfm_ies`. This function is called from `ieee80211_tdls_add_ies` when the `action_code` is `WLAN_TDLS_SETUP_CONFIRM`.

So, where else are `sta` or `ap_sta` used after the return? I have to consider the other functions called by `ieee80211_tdls_add_ies`, which are `ieee80211_tdls_add_setup_start_ies`, `ieee80211_tdls_add_link_ie`, `ieee80211_tdls_add_chan_switch_req_ies`, and `ieee80211_tdls_add_chan_switch_resp_ies`. I need to review all of those. Starting with `ieee80211_tdls_add_setup_start_ies`, I'm going to follow the same logic.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_setup_start_ies]

map[SourceCode: 364:	static void
 365:	ieee80211_tdls_add_setup_start_ies(struct ieee80211_link_data *link,
 366:					   struct sk_buff *skb, const u8 *peer,
 367:					   u8 action_code, bool initiator,
 368:					   const u8 *extra_ies, size_t extra_ies_len)
 369:	{
 370:		struct ieee80211_sub_if_data *sdata = link->sdata;
 371:		struct ieee80211_supported_band *sband;
 372:		struct ieee80211_local *local = sdata->local;
 373:		struct ieee80211_sta_ht_cap ht_cap;
 374:		struct ieee80211_sta_vht_cap vht_cap;
 375:		const struct ieee80211_sta_he_cap *he_cap;
 376:		const struct ieee80211_sta_eht_cap *eht_cap;
 377:		struct sta_info *sta = NULL;
 378:		size_t offset = 0, noffset;
 379:		u8 *pos;
 380:	
 381:		sband = ieee80211_get_link_sband(link);
 382:		if (WARN_ON_ONCE(!sband))
 383:			return;
 384:	
 385:		ieee80211_put_srates_elem(skb, sband, 0, 0, WLAN_EID_SUPP_RATES);
 386:		ieee80211_put_srates_elem(skb, sband, 0, 0, WLAN_EID_EXT_SUPP_RATES);
 387:		ieee80211_tdls_add_supp_channels(sdata, skb);
 388:	
 389:		/* add any custom IEs that go before Extended Capabilities */
 390:		if (extra_ies_len) {
 391:			static const u8 before_ext_cap[] = {
 392:				WLAN_EID_SUPP_RATES,
 393:				WLAN_EID_COUNTRY,
 394:				WLAN_EID_EXT_SUPP_RATES,
 395:				WLAN_EID_SUPPORTED_CHANNELS,
 396:				WLAN_EID_RSN,
 397:			};
 398:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 399:						     before_ext_cap,
 400:						     ARRAY_SIZE(before_ext_cap),
 401:						     offset);
 402:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 403:			offset = noffset;
 404:		}
 405:	
 406:		ieee80211_tdls_add_ext_capab(link, skb);
 407:	
 408:		/* add the QoS element if we support it */
 409:		if (local->hw.queues >= IEEE80211_NUM_ACS &&
 410:		    action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
 411:			ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */
 412:	
 413:		/* add any custom IEs that go before HT capabilities */
 414:		if (extra_ies_len) {
 415:			static const u8 before_ht_cap[] = {
 416:				WLAN_EID_SUPP_RATES,
 417:				WLAN_EID_COUNTRY,
 418:				WLAN_EID_EXT_SUPP_RATES,
 419:				WLAN_EID_SUPPORTED_CHANNELS,
 420:				WLAN_EID_RSN,
 421:				WLAN_EID_EXT_CAPABILITY,
 422:				WLAN_EID_QOS_CAPA,
 423:				WLAN_EID_FAST_BSS_TRANSITION,
 424:				WLAN_EID_TIMEOUT_INTERVAL,
 425:				WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 426:			};
 427:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 428:						     before_ht_cap,
 429:						     ARRAY_SIZE(before_ht_cap),
 430:						     offset);
 431:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 432:			offset = noffset;
 433:		}
 434:	
 435:		/* we should have the peer STA if we're already responding */
 436:		if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
 437:			sta = sta_info_get(sdata, peer);
 438:			if (WARN_ON_ONCE(!sta))
 439:				return;
 440:	
 441:			sta->tdls_chandef = link->conf->chanreq.oper;
 442:		}
 443:	
 444:		ieee80211_tdls_add_oper_classes(link, skb);
 445:	
 446:		/*
 447:		 * with TDLS we can switch channels, and HT-caps are not necessarily
 448:		 * the same on all bands. The specification limits the setup to a
 449:		 * single HT-cap, so use the current band for now.
 450:		 */
 451:		memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 452:	
 453:		if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
 454:		     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
 455:		    ht_cap.ht_supported) {
 456:			ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 457:	
 458:			/* disable SMPS in TDLS initiator */
 459:			ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
 460:					<< IEEE80211_HT_CAP_SM_PS_SHIFT;
 461:	
 462:			pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 463:			ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
 464:		} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
 465:			   ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
 466:			/* the peer caps are already intersected with our own */
 467:			memcpy(&ht_cap, &sta->sta.deflink.ht_cap, sizeof(ht_cap));
 468:	
 469:			pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 470:			ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
 471:		}
 472:	
 473:		if (ht_cap.ht_supported &&
 474:		    (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 475:			ieee80211_tdls_add_bss_coex_ie(skb);
 476:	
 477:		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 478:	
 479:		/* add any custom IEs that go before VHT capabilities */
 480:		if (extra_ies_len) {
 481:			static const u8 before_vht_cap[] = {
 482:				WLAN_EID_SUPP_RATES,
 483:				WLAN_EID_COUNTRY,
 484:				WLAN_EID_EXT_SUPP_RATES,
 485:				WLAN_EID_SUPPORTED_CHANNELS,
 486:				WLAN_EID_RSN,
 487:				WLAN_EID_EXT_CAPABILITY,
 488:				WLAN_EID_QOS_CAPA,
 489:				WLAN_EID_FAST_BSS_TRANSITION,
 490:				WLAN_EID_TIMEOUT_INTERVAL,
 491:				WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 492:				WLAN_EID_MULTI_BAND,
 493:			};
 494:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 495:						     before_vht_cap,
 496:						     ARRAY_SIZE(before_vht_cap),
 497:						     offset);
 498:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 499:			offset = noffset;
 500:		}
 501:	
 502:		/* add AID if VHT, HE or EHT capabilities supported */
 503:		memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 504:		he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
 505:		eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
 506:		if ((vht_cap.vht_supported || he_cap || eht_cap) &&
 507:		    (action_code == WLAN_TDLS_SETUP_REQUEST ||
 508:		     action_code == WLAN_TDLS_SETUP_RESPONSE))
 509:			ieee80211_tdls_add_aid(sdata, skb);
 510:	
 511:		/* build the VHT-cap similarly to the HT-cap */
 512:		if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
 513:		     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
 514:		    vht_cap.vht_supported) {
 515:			ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 516:	
 517:			pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 518:			ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
 519:		} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
 520:			   vht_cap.vht_supported && sta->sta.deflink.vht_cap.vht_supported) {
 521:			/* the peer caps are already intersected with our own */
 522:			memcpy(&vht_cap, &sta->sta.deflink.vht_cap, sizeof(vht_cap));
 523:	
 524:			pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 525:			ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
 526:	
 527:			/*
 528:			 * if both peers support WIDER_BW, we can expand the chandef to
 529:			 * a wider compatible one, up to 80MHz
 530:			 */
 531:			if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 532:				ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 533:		}
 534:	
 535:		/* add any custom IEs that go before HE capabilities */
 536:		if (extra_ies_len) {
 537:			static const u8 before_he_cap[] = {
 538:				WLAN_EID_EXTENSION,
 539:				WLAN_EID_EXT_FILS_REQ_PARAMS,
 540:				WLAN_EID_AP_CSN,
 541:			};
 542:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 543:						     before_he_cap,
 544:						     ARRAY_SIZE(before_he_cap),
 545:						     offset);
 546:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 547:			offset = noffset;
 548:		}
 549:	
 550:		/* build the HE-cap from sband */
 551:		if (action_code == WLAN_TDLS_SETUP_REQUEST ||
 552:		    action_code == WLAN_TDLS_SETUP_RESPONSE ||
 553:		    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
 554:			ieee80211_put_he_cap(skb, sdata, sband, NULL);
 555:	
 556:			/* Build HE 6Ghz capa IE from sband */
 557:			if (sband->band == NL80211_BAND_6GHZ)
 558:				ieee80211_put_he_6ghz_cap(skb, sdata, link->smps_mode);
 559:		}
 560:	
 561:		/* add any custom IEs that go before EHT capabilities */
 562:		if (extra_ies_len) {
 563:			static const u8 before_he_cap[] = {
 564:				WLAN_EID_EXTENSION,
 565:				WLAN_EID_EXT_FILS_REQ_PARAMS,
 566:				WLAN_EID_AP_CSN,
 567:			};
 568:	
 569:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 570:						     before_he_cap,
 571:						     ARRAY_SIZE(before_he_cap),
 572:						     offset);
 573:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 574:			offset = noffset;
 575:		}
 576:	
 577:		/* build the EHT-cap from sband */
 578:		if (action_code == WLAN_TDLS_SETUP_REQUEST ||
 579:		    action_code == WLAN_TDLS_SETUP_RESPONSE ||
 580:		    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
 581:			ieee80211_put_eht_cap(skb, sdata, sband, NULL);
 582:	
 583:		/* add any remaining IEs */
 584:		if (extra_ies_len) {
 585:			noffset = extra_ies_len;
 586:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 587:		}
 588:	
 589:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 23949
							output: 58
							thoughts: 446
						

**Analyzing TDLS Setup IEs and Potential Issues**

Okay, so I'm looking at these TDLS setup functions, specifically `ieee80211_tdls_add_setup_start_ies` and `ieee80211_tdls_add_setup_cfm_ies`. The pattern is pretty clear: we're checking the station state with `sta_info_get` and if that returns `NULL`, we throw a `WARN_ON_ONCE` and bail out. My initial thought is that this is supposed to prevent NULL pointer dereferences. It looks like the warning conditions are designed to catch situations where the station state (`sta`) or, in `cfm_ies`, the AP STA (`ap_sta`) are inconsistent with what's expected in the TDLS setup sequence.

Since we return immediately, the code will skip adding the Information Elements (IEs). That much is obvious. The packet gets sent anyway, but it'll be missing those IEs. My immediate concern is, is that the *only* impact?

The allocated `skb` (socket buffer) size is determined earlier in `ieee80211_tdls_build_mgmt_packet_data`. So, if we return early, we simply don't use the entire buffer, which isn't ideal but is unlikely to introduce a memory safety issue on its own. It's really just a question of whether or not we are expecting that space to be there.

However, I need to dig deeper. I see `ieee80211_tdls_add_link_ie` is called at the end of `ieee80211_tdls_add_setup_cfm_ies`. If the warning triggers and we return early, we *don't* call `ieee80211_tdls_add_link_ie`. That's a key detail! I need to see what's in that function. What does `ieee80211_tdls_add_link_ie` do? Is that a critical part of the TDLS setup that's being skipped? That's likely where the significant impact lies if we are not adding link information at the end. I'm going to investigate that function to be sure.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_link_ie]

map[SourceCode: 203:	static void ieee80211_tdls_add_link_ie(struct ieee80211_link_data *link,
 204:					       struct sk_buff *skb, const u8 *peer,
 205:					       bool initiator)
 206:	{
 207:		struct ieee80211_sub_if_data *sdata = link->sdata;
 208:		struct ieee80211_tdls_lnkie *lnkid;
 209:		const u8 *init_addr, *rsp_addr;
 210:	
 211:		if (initiator) {
 212:			init_addr = sdata->vif.addr;
 213:			rsp_addr = peer;
 214:		} else {
 215:			init_addr = peer;
 216:			rsp_addr = sdata->vif.addr;
 217:		}
 218:	
 219:		lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
 220:	
 221:		lnkid->ie_type = WLAN_EID_LINK_ID;
 222:		lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;
 223:	
 224:		memcpy(lnkid->bssid, link->u.mgd.bssid, ETH_ALEN);
 225:		memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
 226:		memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
 227:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 25445
							output: 48
							thoughts: 1253
						

**Analysis of TDLS Setup Confirm Packet Generation**

Okay, let's break this down. It looks like this function (`ieee80211_tdls_add_setup_cfm_ies`) has a potential flaw. I can see that it doesn't depend on `sta` or `ap_sta` directly within its main logic (it uses `link`).

The concern is that if `ieee80211_tdls_add_setup_cfm_ies` returns early due to the warning, then `ieee80211_tdls_add_link_ie` isn't called. The TDLS Setup Confirm frame *must* contain a Link Identifier IE. If that IE is missing, the peer device is almost certain to reject the setup.

So the immediate impact is a TDLS setup failure. That's the primary consequence.

Now, is there any possibility of memory corruption? I don't see any immediate red flags. The `skb` is allocated, data is added to it, and then it is sent. The `skb_put` calls within this function and its sub-functions are safe because they are only executed if we don't return early.

Let me double-check that `sta` or `ap_sta` aren't somehow used in a way I missed *before* the warning. Looking at the code:

```c
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
 612:			return;
 613:	
 614:		sta->tdls_chandef = link->conf->chanreq.oper;
```

Line 612 is a `return;`. So nothing after the `WARN_ON_ONCE` is executed.

Let's look at how the caller functions handle it:
`ieee80211_tdls_add_ies` calls the function:

```c
 760:		case WLAN_TDLS_SETUP_CONFIRM:
 761:			if (status_code == 0)
 762:				ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
 763:								 initiator, extra_ies,
 764:								 extra_ies_len);
 765:			break;
```

It just breaks.

`ieee80211_tdls_build_mgmt_packet_data`:

```c
 984:		ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
 985:				       initiator, extra_ies, extra_ies_len, oper_class,
 986:				       chandef);
 987:		rcu_read_unlock();
 988:		return skb;
```

It returns the `skb`.

`ieee80211_tdls_prep_mgmt_packet`:

```c
1058:		skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
...
1124:		__ieee80211_subif_start_xmit(skb, dev, flags,
1125:					     IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
```

It transmits the `skb`.

So the consequences are:

1.  A `WARNING` is logged.
2.  An incomplete TDLS Setup Confirm packet is sent.
3.  TDLS setup likely fails.

This is likely not a system stability issue – no crashes or corruption. It's effectively a "denial of service" specific to the TDLS link establishment, but not a full system outage.

It is worth noting this may well be why syzbot found this. The user asked "If the warning is triggered, does it lead to memory corruption, denial of service, or is it just a benign warning?".

Let me also check if `sta` or `ap_sta` are used anywhere else in `ieee80211_tdls_add_setup_cfm_ies` *before* that warning:

```c
 608:		sta = sta_info_get(sdata, peer);
 609:		ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_

map[ContextFile:net/mac80211/tdls.c Name:ieee80211_link_data]

map[Fields:[map[Name:sdata OffsetBits:0 SizeBits:64] map[Name:link_id OffsetBits:64 SizeBits:32] map[Name:gtk OffsetBits:128 SizeBits:512] map[Name:default_multicast_key OffsetBits:640 SizeBits:64] map[Name:default_mgmt_key OffsetBits:704 SizeBits:64] map[Name:default_beacon_key OffsetBits:768 SizeBits:64] map[Name:operating_11g_mode OffsetBits:832 SizeBits:8] map[Name:csa OffsetBits:896 SizeBits:832] map[Name:color_change_finalize_work OffsetBits:1728 SizeBits:192] map[Name:color_collision_detect_work OffsetBits:1920 SizeBits:896] map[Name:color_bitmap OffsetBits:2816 SizeBits:64] map[Name:reserved_chanctx OffsetBits:2880 SizeBits:64] map[Name:reserved OffsetBits:2944 SizeBits:640] map[Name:reserved_radar_required OffsetBits:3584 SizeBits:8] map[Name:reserved_ready OffsetBits:3592 SizeBits:8] map[Name:needed_rx_chains OffsetBits:3600 SizeBits:8] map[Name:smps_mode OffsetBits:3616 SizeBits:32] map[Name:user_power_level OffsetBits:3648 SizeBits:32] map[Name:ap_power_level OffsetBits:3680 SizeBits:32] map[Name:radar_required OffsetBits:3712 SizeBits:8] map[Name:dfs_cac_timer_work OffsetBits:3776 SizeBits:768] map[Name:u OffsetBits:4544 SizeBits:3008] map[Name:tx_conf OffsetBits:7552 SizeBits:448] map[Name:conf OffsetBits:8000 SizeBits:64] map[Name:debugfs_dir OffsetBits:8064 SizeBits:64]]]

gemini-3-flash-preview

							input: 28352
							output: 31
							thoughts: 978
						

**Analyzing a `WARN_ON` in TDLS Setup Confirm Handling**

Okay, so I'm looking at this warning that's popping up: `!sta || !ap_sta`. I need to figure out the root cause. My first thought is: `conf` is a `struct ieee80211_link_conf` pointer, but the specific warning is about `sta` or `ap_sta` being NULL. Typically, these are set during link configuration, but let's dive into why we're returning early in the code. I need to make sure there are no other side effects of the `ieee80211_tdls_add_setup_cfm_ies` call that might get missed if we return prematurely. Specifically, this modifies `sta->tdls_chandef` and potentially calls `ieee80211_tdls_chandef_vht_upgrade(sdata, sta)`. Both rely on `sta`, so returning early due to a NULL pointer would skip these important operations.

Now, are `sta` or `ap_sta` being NULL more than just a check? If `ap_sta` is NULL, it's weird: we're "associated" but don't have an `sta_info` for the AP. That shouldn't happen normally. If `sta` is NULL, that's an indication that we are sending a TDLS Setup Confirm to a peer we don't know about. A malicious userspace could exploit this through something like `nl80211`.

Let's revisit the syzbot report. The warning comes from `ieee80211_tdls_add_setup_cfm_ies`, specifically triggered during the call to `ieee80211_tdls_build_mgmt_packet_data`. This function is part of the TDLS management packet build, which ultimately traces back to `ieee80211_tdls_mgmt`. The `NL80211_CMD_TDLS_MGMT` handler is where it all begins.

So, userspace can trigger this by sending a malformed `NL80211_CMD_TDLS_MGMT` with `WLAN_TDLS_SETUP_CONFIRM` and a peer address that is not in the station list. Essentially, it's sending a confirm to someone we don't know about. The kernel just logs the warning and sends a junk packet. This isn't a security vulnerability per se, but it's a reachable `WARN_ON`. Kernel developers use `WARN_ON` to indicate something should never happen. Because userspace can trigger it, it should be changed to a regular error return instead of a `WARN_ON`.

But I should see if `sta_info_get` could fail under normal conditions. TDLS setup has several steps: Request, Response, Confirm. The peer's `sta_info` is typically created during the first two steps. If userspace skips the earlier steps and goes straight to Confirm, `sta` could be NULL. Or, if the `sta_info` has timed out or been removed, that could also cause a NULL `sta`.

If `ap_sta` is NULL, that's even stranger. We're calling `sta_info_get` on the AP's BSSID. If we're associated, there *should* be a `sta_info`. However, what if we disassociated very recently, but the TDLS command is still processing? `ieee80211_tdls_mgmt` checks `sdata->u.mgd.associated`, but there might be a race between this check and the `sta_info_get` call. Removing station info involves locks.

Wait, is `ieee80211_tdls_mgmt` called with the `rtnl` lock? No, nl80211 commands use `wdev_lock` usually.

I should check `net/wireless/nl80211.c` to see exactly how `NL80211_CMD_TDLS_MGMT` is handled to confirm.

requested entity does not exist

map[Name:NL80211_CMD_TDLS_MGMT]

map[References:<nil> TruncatedOutput:false]

gemini-3-flash-preview

							input: 30282
							output: 52
							thoughts: 45
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Analyzing the NL80211 TDLS Management Command**

Right, my mental checklist begins. I'm focusing on that `NL80211_CMD_TDLS_MGMT` command. First, the instinct is to locate where the rubber meets the road. I need to pinpoint the appropriate handler, the function in the driver code that's responsible for processing this specific command. Let's see... and yes, my understanding is correct, the associated handler function is aptly named `nl80211_tdls_mgmt`. The naming convention is pretty clear. So, `NL80211_CMD_TDLS_MGMT` maps neatly to `nl80211_tdls_mgmt`. That's a solid starting point for further investigation. Now I know where to dive in and examine the relevant code.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_tdls_mgmt]

map[SourceCode:13691:	static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
13692:	{
13693:		struct cfg80211_registered_device *rdev = info->user_ptr[0];
13694:		struct net_device *dev = info->user_ptr[1];
13695:		u8 action_code, dialog_token;
13696:		u32 peer_capability = 0;
13697:		u16 status_code;
13698:		u8 *peer;
13699:		int link_id;
13700:		bool initiator;
13701:	
13702:		if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
13703:		    !rdev->ops->tdls_mgmt)
13704:			return -EOPNOTSUPP;
13705:	
13706:		if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
13707:		    !info->attrs[NL80211_ATTR_STATUS_CODE] ||
13708:		    !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
13709:		    !info->attrs[NL80211_ATTR_IE] ||
13710:		    !info->attrs[NL80211_ATTR_MAC])
13711:			return -EINVAL;
13712:	
13713:		peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
13714:		action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
13715:		status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
13716:		dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
13717:		initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
13718:		if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
13719:			peer_capability =
13720:				nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
13721:		link_id = nl80211_link_id_or_invalid(info->attrs);
13722:	
13723:		return rdev_tdls_mgmt(rdev, dev, peer, link_id, action_code,
13724:				      dialog_token, status_code, peer_capability,
13725:				      initiator,
13726:				      nla_data(info->attrs[NL80211_ATTR_IE]),
13727:				      nla_len(info->attrs[NL80211_ATTR_IE]));
13728:	}
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 31482
							output: 41
							thoughts: 1893
						

**Analysis of mac80211 TDLS Management Vulnerability**

Okay, so the `rdev_tdls_mgmt` call ultimately hits `ieee80211_tdls_mgmt` in mac80211. And, as suspected, the `nl80211_tdls_mgmt` function doesn't validate the peer MAC address. Essentially, userspace can pass *any* MAC address. This is where things get interesting.

If userspace provides a MAC that's *not* in the station list, `sta_info_get` returns NULL. This then triggers a `WARN_ON_ONCE`. The user's question, whether this is just a benign warning, is a good one.

It's not memory corruption; that's good. It's not a true denial of service, unless the kernel is configured with `panic_on_warn`. Without that flag, it's really just a noisy warning and an unsuccessful TDLS operation. But it *is* a bug because userspace shouldn't be able to trigger a `WARN_ON`.

Let's double-check the code to be absolutely sure:

Okay, so the critical lines in `ieee80211_tdls_add_setup_cfm_ies` are at 611-612: `if (WARN_ON_ONCE(!sta || !ap_sta)) return;`. This immediately returns if either `sta` or `ap_sta` are null. Good. The condition `!sta || !ap_sta` covers both scenarios – if `sta` is NULL, if `ap_sta` is NULL, or both. It *always* returns safely.

Now, does the early return cause any issues? I need to check how `ieee80211_tdls_add_setup_cfm_ies` is called to see if inconsistent state can occur. Okay, it's called from `ieee80211_tdls_add_ies` which, in turn, is only called from `ieee80211_tdls_build_mgmt_packet_data`.

Does the early return leave an `skb` in an inconsistent state? No, the `skb` receives some data from `ieee80211_prep_tdls_encap_data`. If we return early, the `skb` contains a valid, though short, TDLS Setup Confirm frame. The networking stack will handle it appropriately. Good. Also, `ieee80211_tdls_add_setup_cfm_ies` is a static function.

Let's step back, and search for other `WARN_ON`s in `tdls.c` that could also be triggered by userspace, keeping in mind the user's specific concern about line 611.

Wait, looking at the same file, the `ieee80211_tdls_add_setup_start_ies` has `WARN_ON_ONCE(!sta)` at line 438, which is reachable from userspace, via `NL80211_CMD_TDLS_MGMT` with `WLAN_TDLS_SETUP_RESPONSE`.

So the mac80211 TDLS code uses `WARN_ON_ONCE` for conditions that can actually be triggered by userspace (or a race condition with userspace).

Is there a memory leak here? The `skb` is allocated in `ieee80211_tdls_build_mgmt_packet_data`. If we return early, the `skb` is still passed back up, and then transmitted via `__ieee80211_subif_start_xmit`, which takes ownership and frees the `skb`. So, no leak.

So, the impact of the bug is indeed just a warning and a failed TDLS setup, provided that `panic_on_warn` is not enabled.
- The root cause is a `WARN_ON_ONCE` that can be triggered by userspace.
- The code *does* handle the NULL pointers correctly by returning early, so no kernel crash (NULL deref) occurs.
- The resulting packet will be incomplete, meaning the TDLS setup will fail.
- There is no memory corruption or leak.
- Denial of Service only occurs if `panic_on_warn` is enabled.

What about other impacts? If `sta` is NULL, we can't set `sta->tdls_chandef`. This is ok. If `ap_sta` is NULL, we can't check its HT capabilities. This is likely the reason for the warning. The

map[End:612 File:net/mac80211/tdls.c Start:610]

map[Output:78a7ea370d5f0 610) 
78a7ea370d5f0 611) 	if (WARN_ON_ONCE(!sta || !ap_sta))
6f7eaa47e1de3 612) 		return;
]

gemini-3-flash-preview

							input: 34530
							output: 27
							thoughts: 20
						

Okay, let's dive into commit `78a7ea370d5f0`. I need to understand what changed here. Given my expertise, I'm expecting to quickly grasp the implications, but I also need to be meticulous. I'll start by examining the diff itself, focusing on the context surrounding the modified lines. I'll pay close attention to the specific code snippets altered and how they interact with the existing system.

I'll be looking for potential side effects, performance implications, and any possible regressions that this commit might introduce. Does this seem to align with the overall project goals, or does it deviate in any meaningful way? What were the reasons for making these changes? Is the reasoning clear from the commit message, or do I need to dig deeper? I need to analyze the surrounding code to understand the changes in the larger context.

My brain is already running through potential test cases and scenarios to validate the modification's impact. I am assessing the potential areas affected. I am ready to delve into a line-by-line comparison, and I'm prepared to use any available tools and documentation to ensure I have a complete picture of the change and its implications. Ultimately, I'm aiming for a thorough understanding so I can provide an informed assessment.

map[Commit:78a7ea370d5f0]

map[Output:commit 78a7ea370d5f0eb6f3e774e7f6afece1c3a6860f
Author: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
Date:   Fri Jun 16 09:53:51 2023 +0300

    wifi: mac80211: handle TDLS negotiation with MLO
    
    Userspace can now select the link to use for TDLS management
    frames (indicating e.g. which BSSID should be used), use the
    link_id received from cfg80211 to build the frames.
    
    Signed-off-by: Mukesh Sisodiya <mukesh.sisodiya@intel.com>
    Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
    Link: https://lore.kernel.org/r/20230616094948.ce1fc230b505.Ie773c5679805001f5a52680d68d9ce0232c57648@changeid
    [Benjamin fixed some locking]
    Co-developed-by: Benjamin Berg <benjamin.berg@intel.com>
    Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
    [fix sta mutex locking too]
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index 6575b2801676..a920e2a7a978 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -39,9 +39,10 @@ void ieee80211_tdls_peer_del_work(struct work_struct *wk)
 	mutex_unlock(&local->mtx);
 }
 
-static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata,
+static void ieee80211_tdls_add_ext_capab(struct ieee80211_link_data *link,
 					 struct sk_buff *skb)
 {
+	struct ieee80211_sub_if_data *sdata = link->sdata;
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	bool chan_switch = local->hw.wiphy->features &
@@ -50,7 +51,7 @@ static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata,
 			  !ifmgd->tdls_wider_bw_prohibited;
 	bool buffer_sta = ieee80211_hw_check(&local->hw,
 					     SUPPORTS_TDLS_BUFFER_STA);
-	struct ieee80211_supported_band *sband = ieee80211_get_sband(sdata);
+	struct ieee80211_supported_band *sband = ieee80211_get_link_sband(link);
 	bool vht = sband && sband->vht_cap.vht_supported;
 	u8 *pos = skb_put(skb, 10);
 
@@ -152,13 +153,13 @@ ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata,
 	*pos = 2 * subband_cnt;
 }
 
-static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata,
+static void ieee80211_tdls_add_oper_classes(struct ieee80211_link_data *link,
 					    struct sk_buff *skb)
 {
 	u8 *pos;
 	u8 op_class;
 
-	if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef,
+	if (!ieee80211_chandef_to_operating_class(&link->conf->chandef,
 						  &op_class))
 		return;
 
@@ -180,7 +181,7 @@ static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb)
 	*pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST;
 }
 
-static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata,
+static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_link_data *link,
 					u16 status_code)
 {
 	struct ieee80211_supported_band *sband;
@@ -189,7 +190,8 @@ static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata,
 	if (status_code != 0)
 		return 0;
 
-	sband = ieee80211_get_sband(sdata);
+	sband = ieee80211_get_link_sband(link);
+
 	if (sband && sband->band == NL80211_BAND_2GHZ) {
 		return WLAN_CAPABILITY_SHORT_SLOT_TIME |
 		       WLAN_CAPABILITY_SHORT_PREAMBLE;
@@ -198,10 +200,11 @@ static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata,
 	return 0;
 }
 
-static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata,
+static void ieee80211_tdls_add_link_ie(struct ieee80211_link_data *link,
 				       struct sk_buff *skb, const u8 *peer,
 				       bool initiator)
 {
+	struct ieee80211_sub_if_data *sdata = link->sdata;
 	struct ieee80211_tdls_lnkie *lnkid;
 	const u8 *init_addr, *rsp_addr;
 
@@ -218,7 +221,7 @@ static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata,
 	lnkid->ie_type = WLAN_EID_LINK_ID;
 	lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;
 
-	memcpy(lnkid->bssid, sdata->deflink.u.mgd.bssid, ETH_ALEN);
+	memcpy(lnkid->bssid, link->u.mgd.bssid, ETH_ALEN);
 	memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
 	memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
 }
@@ -359,11 +362,12 @@ ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata,
 }
 
 static void
-ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
+ieee80211_tdls_add_setup_start_ies(struct ieee80211_link_data *link,
 				   struct sk_buff *skb, const u8 *peer,
 				   u8 action_code, bool initiator,
 				   const u8 *extra_ies, size_t extra_ies_len)
 {
+	struct ieee80211_sub_if_data *sdata = link->sdata;
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_sta_ht_cap ht_cap;
@@ -372,8 +376,8 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
 	size_t offset = 0, noffset;
 	u8 *pos;
 
-	sband = ieee80211_get_sband(sdata);
-	if (!sband)
+	sband = ieee80211_get_link_sband(link);
+	if (WARN_ON_ONCE(!sband))
 		return;
 
 	ieee80211_add_srates_ie(sdata, skb, false, sband->band);
@@ -397,7 +401,7 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
 		offset = noffset;
 	}
 
-	ieee80211_tdls_add_ext_capab(sdata, skb);
+	ieee80211_tdls_add_ext_capab(link, skb);
 
 	/* add the QoS element if we support it */
 	if (local->hw.queues >= IEEE80211_NUM_ACS &&
@@ -426,20 +430,16 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
 		offset = noffset;
 	}
 
-	mutex_lock(&local->sta_mtx);
-
 	/* we should have the peer STA if we're already responding */
 	if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
 		sta = sta_info_get(sdata, peer);
-		if (WARN_ON_ONCE(!sta)) {
-			mutex_unlock(&local->sta_mtx);
+		if (WARN_ON_ONCE(!sta))
 			return;
-		}
 
-		sta->tdls_chandef = sdata->vif.bss_conf.chandef;
+		sta->tdls_chandef = link->conf->chandef;
 	}
 
-	ieee80211_tdls_add_oper_classes(sdata, skb);
+	ieee80211_tdls_add_oper_classes(link, skb);
 
 	/*
 	 * with TDLS we can switch channels, and HT-caps are not necessarily
@@ -472,7 +472,7 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
 	    (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 		ieee80211_tdls_add_bss_coex_ie(skb);
 
-	ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
+	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 
 	/* add any custom IEs that go before VHT capabilities */
 	if (extra_ies_len) {
@@ -529,8 +529,6 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
 			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 	}
 
-	mutex_unlock(&local->sta_mtx);
-
 	/* add any remaining IEs */
 	if (extra_ies_len) {
 		noffset = extra_ies_len;
@@ -540,31 +538,29 @@ ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
 }
 
 static void
-ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
+ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
 				 struct sk_buff *skb, const u8 *peer,
 				 bool initiator, const u8 *extra_ies,
 				 size_t extra_ies_len)
 {
+	struct ieee80211_sub_if_data *sdata = link->sdata;
 	struct ieee80211_local *local = sdata->local;
 	size_t offset = 0, noffset;
 	struct sta_info *sta, *ap_sta;
 	struct ieee80211_supported_band *sband;
 	u8 *pos;
 
-	sband = ieee80211_get_sband(sdata);
-	if (!sband)
+	sband = ieee80211_get_link_sband(link);
+	if (WARN_ON_ONCE(!sband))
 		return;
 
-	mutex_lock(&local->sta_mtx);
-
 	sta = sta_info_get(sdata, peer);
-	ap_sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
-	if (WARN_ON_ONCE(!sta || !ap_sta)) {
-		mutex_unlock(&local->sta_mtx);
+	ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
+
+	if (WARN_ON_ONCE(!sta || !ap_sta))
 		return;
-	}
 
-	sta->tdls_chandef = sdata->vif.bss_conf.chandef;
+	sta->tdls_chandef = link->conf->chandef;
 
 	/* add any custom IEs that go before the QoS IE */
 	if (extra_ies_len) {
@@ -610,11 +606,11 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
 
 		pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
 		ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
-					   &sdata->vif.bss_conf.chandef, prot,
+					   &link->conf->chandef, prot,
 					   true);
 	}
 
-	ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
+	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 
 	/* only include VHT-operation if not on the 2.4GHz band */
 	if (sband->band != NL80211_BAND_2GHZ &&
@@ -631,8 +627,6 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
 					    &sta->tdls_chandef);
 	}
 
-	mutex_unlock(&local->sta_mtx);
-
 	/* add any remaining IEs */
 	if (extra_ies_len) {
 		noffset = extra_ies_len;
@@ -641,7 +635,7 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
 }
 
 static void
-ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata,
+ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_link_data *link,
 				       struct sk_buff *skb, const u8 *peer,
 				       bool initiator, const u8 *extra_ies,
 				       size_t extra_ies_len, u8 oper_class,
@@ -670,7 +664,7 @@ ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata,
 		offset = noffset;
 	}
 
-	ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
+	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 
 	/* add any remaining IEs */
 	if (extra_ies_len) {
@@ -680,20 +674,20 @@ ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata,
 }
 
 static void
-ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata,
+ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_link_data *link,
 					struct sk_buff *skb, const u8 *peer,
 					u16 status_code, bool initiator,
 					const u8 *extra_ies,
 					size_t extra_ies_len)
 {
 	if (status_code == 0)
-		ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
+		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 
 	if (extra_ies_len)
 		skb_put_data(skb, extra_ies, extra_ies_len);
 }
 
-static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
+static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
 				   struct sk_buff *skb, const u8 *peer,
 				   u8 action_code, u16 status_code,
 				   bool initiator, const u8 *extra_ies,
@@ -705,7 +699,8 @@ static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
 	case WLAN_TDLS_SETUP_RESPONSE:
 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 		if (status_code == 0)
-			ieee80211_tdls_add_setup_start_ies(sdata, skb, peer,
+			ieee80211_tdls_add_setup_start_ies(link,
+							   skb, peer,
 							   action_code,
 							   initiator,
 							   extra_ies,
@@ -713,7 +708,7 @@ static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
 		break;
 	case WLAN_TDLS_SETUP_CONFIRM:
 		if (status_code == 0)
-			ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer,
+			ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
 							 initiator, extra_ies,
 							 extra_ies_len);
 		break;
@@ -722,16 +717,17 @@ static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
 		if (extra_ies_len)
 			skb_put_data(skb, extra_ies, extra_ies_len);
 		if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
-			ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
+			ieee80211_tdls_add_link_ie(link, skb,
+						   peer, initiator);
 		break;
 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
-		ieee80211_tdls_add_chan_switch_req_ies(sdata, skb, peer,
+		ieee80211_tdls_add_chan_switch_req_ies(link, skb, peer,
 						       initiator, extra_ies,
 						       extra_ies_len,
 						       oper_class, chandef);
 		break;
 	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
-		ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer,
+		ieee80211_tdls_add_chan_switch_resp_ies(link, skb, peer,
 							status_code,
 							initiator, extra_ies,
 							extra_ies_len);
@@ -742,6 +738,7 @@ static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
 
 static int
 ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
+			       struct ieee80211_link_data *link,
 			       const u8 *peer, u8 action_code, u8 dialog_token,
 			       u16 status_code, struct sk_buff *skb)
 {
@@ -766,7 +763,7 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 		skb_put(skb, sizeof(tf->u.setup_req));
 		tf->u.setup_req.dialog_token = dialog_token;
 		tf->u.setup_req.capability =
-			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
+			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 								 status_code));
 		break;
 	case WLAN_TDLS_SETUP_RESPONSE:
@@ -777,7 +774,7 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 		tf->u.setup_resp.status_code = cpu_to_le16(status_code);
 		tf->u.setup_resp.dialog_token = dialog_token;
 		tf->u.setup_resp.capability =
-			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
+			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 								 status_code));
 		break;
 	case WLAN_TDLS_SETUP_CONFIRM:
@@ -824,7 +821,8 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 
 static int
 ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
-			   const u8 *peer, u8 action_code, u8 dialog_token,
+			   const u8 *peer, struct ieee80211_link_data *link,
+			   u8 action_code, u8 dialog_token,
 			   u16 status_code, struct sk_buff *skb)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
@@ -833,8 +831,7 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
 	mgmt = skb_put_zero(skb, 24);
 	memcpy(mgmt->da, peer, ETH_ALEN);
 	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
-	memcpy(mgmt->bssid, sdata->deflink.u.mgd.bssid, ETH_ALEN);
-
+	memcpy(mgmt->bssid, link->u.mgd.bssid, ETH_ALEN);
 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 					  IEEE80211_STYPE_ACTION);
 
@@ -847,7 +844,7 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
 		mgmt->u.action.u.tdls_discover_resp.dialog_token =
 			dialog_token;
 		mgmt->u.action.u.tdls_discover_resp.capability =
-			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
+			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 								 status_code));
 		break;
 	default:
@@ -859,15 +856,23 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
 
 static struct sk_buff *
 ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
-				      const u8 *peer, u8 action_code,
-				      u8 dialog_token, u16 status_code,
-				      bool initiator, const u8 *extra_ies,
-				      size_t extra_ies_len, u8 oper_class,
+				      const u8 *peer, int link_id,
+				      u8 action_code, u8 dialog_token,
+				      u16 status_code, bool initiator,
+				      const u8 *extra_ies, size_t extra_ies_len,
+				      u8 oper_class,
 				      struct cfg80211_chan_def *chandef)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct sk_buff *skb;
 	int ret;
+	struct ieee80211_link_data *link;
+
+	link_id = link_id >= 0 ? link_id : 0;
+	rcu_read_lock();
+	link = rcu_dereference(sdata->link[link_id]);
+	if (WARN_ON(!link))
+		goto unlock;
 
 	skb = netdev_alloc_skb(sdata->dev,
 			       local->hw.extra_tx_headroom +
@@ -887,7 +892,7 @@ ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 			       extra_ies_len +
 			       sizeof(struct ieee80211_tdls_lnkie));
 	if (!skb)
-		return NULL;
+		goto unlock;
 
 	skb_reserve(skb, local->hw.extra_tx_headroom);
 
@@ -900,13 +905,13 @@ ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 		ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
-						     sdata->dev, peer,
+						     sdata->dev, link, peer,
 						     action_code, dialog_token,
 						     status_code, skb);
 		break;
 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 		ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
-						 peer, action_code,
+						 peer, link, action_code,
 						 dialog_token, status_code,
 						 skb);
 		break;
@@ -918,19 +923,23 @@ ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 	if (ret < 0)
 		goto fail;
 
-	ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code,
+	ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
 			       initiator, extra_ies, extra_ies_len, oper_class,
 			       chandef);
+	rcu_read_unlock();
 	return skb;
 
 fail:
 	dev_kfree_skb(skb);
+unlock:
+	rcu_read_unlock();
 	return NULL;
 }
 
 static int
 ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
-				const u8 *peer, u8 action_code, u8 dialog_token,
+				const u8 *peer, int link_id,
+				u8 action_code, u8 dialog_token,
 				u16 status_code, u32 peer_capability,
 				bool initiator, const u8 *extra_ies,
 				size_t extra_ies_len, u8 oper_class,
@@ -988,7 +997,8 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 	if (ret < 0)
 		goto fail;
 
-	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer, action_code,
+	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
+						    link_id, action_code,
 						    dialog_token, status_code,
 						    initiator, extra_ies,
 						    extra_ies_len, oper_class,
@@ -999,7 +1009,7 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 	}
 
 	if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
-		ieee80211_tx_skb(sdata, skb);
+		ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
 		return 0;
 	}
 
@@ -1066,7 +1076,8 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 
 static int
 ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
-			  const u8 *peer, u8 action_code, u8 dialog_token,
+			  const u8 *peer, int link_id,
+			  u8 action_code, u8 dialog_token,
 			  u16 status_code, u32 peer_capability, bool initiator,
 			  const u8 *extra_ies, size_t extra_ies_len)
 {
@@ -1115,7 +1126,8 @@ ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
 	mutex_unlock(&local->mtx);
 
 	/* we cannot take the mutex while preparing the setup packet */
-	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code,
+	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
+					      link_id, action_code,
 					      dialog_token, status_code,
 					      peer_capability, initiator,
 					      extra_ies, extra_ies_len, 0,
@@ -1139,7 +1151,8 @@ ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
 
 static int
 ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
-			     const u8 *peer, u8 action_code, u8 dialog_token,
+			     const u8 *peer, int link_id,
+			     u8 action_code, u8 dialog_token,
 			     u16 status_code, u32 peer_capability,
 			     bool initiator, const u8 *extra_ies,
 			     size_t extra_ies_len)
@@ -1159,7 +1172,8 @@ ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
 				  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);
 	ieee80211_flush_queues(local, sdata, false);
 
-	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code,
+	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
+					      link_id, action_code,
 					      dialog_token, status_code,
 					      peer_capability, initiator,
 					      extra_ies, extra_ies_len, 0,
@@ -1204,13 +1218,14 @@ int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
 	switch (action_code) {
 	case WLAN_TDLS_SETUP_REQUEST:
 	case WLAN_TDLS_SETUP_RESPONSE:
-		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code,
+		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
+						link_id, action_code,
 						dialog_token, status_code,
 						peer_capability, initiator,
 						extra_ies, extra_ies_len);
 		break;
 	case WLAN_TDLS_TEARDOWN:
-		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer,
+		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
 						   action_code, dialog_token,
 						   status_code,
 						   peer_capability, initiator,
@@ -1228,7 +1243,7 @@ int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 		/* no special handling */
 		ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
-						      action_code,
+						      link_id, action_code,
 						      dialog_token,
 						      status_code,
 						      peer_capability,
@@ -1240,8 +1255,8 @@ int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
 		break;
 	}
 
-	tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n",
-		 action_code, peer, ret);
+	tdls_dbg(sdata, "TDLS mgmt action %d peer %pM link_id %d status %d\n",
+		 action_code, peer, link_id, ret);
 	return ret;
 }
 
@@ -1497,6 +1512,7 @@ ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class,
 	int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing);
 	u8 *pos = extra_ies;
 	struct sk_buff *skb;
+	int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;
 
 	/*
 	 * if chandef points to a wide channel add a Secondary-Channel
@@ -1524,6 +1540,7 @@ ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class,
 	iee80211_tdls_add_ch_switch_timing(pos, 0, 0);
 
 	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
+					      link_id,
 					      WLAN_TDLS_CHANNEL_SWITCH_REQUEST,
 					      0, 0, !sta->sta.tdls_initiator,
 					      extra_ies, extra_ies_len,
@@ -1644,11 +1661,13 @@ ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta,
 	struct ieee80211_sub_if_data *sdata = sta->sdata;
 	struct sk_buff *skb;
 	u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)];
+	int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;
 
 	/* initial timing are always zero in the template */
 	iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0);
 
 	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
+					link_id,
 					WLAN_TDLS_CHANNEL_SWITCH_RESPONSE,
 					0, 0, !sta->sta.tdls_initiator,
 					extra_ies, sizeof(extra_ies), 0, NULL);
]

gemini-3-flash-preview

							input: 45182
							output: 42
							thoughts: 247
						

**Analyzing the Station Info Retrieval Changes**

Okay, so commit `78a7ea370d5f0` seems to have significantly altered how we're handling `sta_info_get` calls, specifically by moving them outside the `local->sta_mtx` mutex lock. It looks like they've also introduced a `WARN_ON_ONCE`. Now, let me see... originally, the code was structured like this: we'd grab the mutex, *then* call `sta_info_get` twice, once for `peer` (station) and again for the AP's BSSID, and only *then* check for NULL returns with a `WARN_ON_ONCE` before releasing the mutex. Wait a second, wasn't that `WARN_ON_ONCE` already present? I should probably check the previous version of the code and see exactly what changed with the warnings.

map[Commit:78a7ea370d5f0^:net/mac80211/tdls.c]

map[Output:
Full output is too long, showing 1000 out of 2009 lines.

[// SPDX-License-Identifier: GPL-2.0-only
 /*
  * mac80211 TDLS handling code
  *
  * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
  * Copyright 2014, Intel Corporation
  * Copyright 2014  Intel Mobile Communications GmbH
  * Copyright 2015 - 2016 Intel Deutschland GmbH
  * Copyright (C) 2019, 2021-2023 Intel Corporation
  */
 
 #include <linux/ieee80211.h>
 #include <linux/log2.h>
 #include <net/cfg80211.h>
 #include <linux/rtnetlink.h>
 #include "ieee80211_i.h"
 #include "driver-ops.h"
 #include "rate.h"
 #include "wme.h"
 
 /* give usermode some time for retries in setting up the TDLS session */
 #define TDLS_PEER_SETUP_TIMEOUT	(15 * HZ)
 
 void ieee80211_tdls_peer_del_work(struct work_struct *wk)
 {
 	struct ieee80211_sub_if_data *sdata;
 	struct ieee80211_local *local;
 
 	sdata = container_of(wk, struct ieee80211_sub_if_data,
 			     u.mgd.tdls_peer_del_work.work);
 	local = sdata->local;
 
 	mutex_lock(&local->mtx);
 	if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) {
 		tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer);
 		sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer);
 		eth_zero_addr(sdata->u.mgd.tdls_peer);
 	}
 	mutex_unlock(&local->mtx);
 }
 
 static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata,
 					 struct sk_buff *skb)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	bool chan_switch = local->hw.wiphy->features &
 			   NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
 	bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
 			  !ifmgd->tdls_wider_bw_prohibited;
 	bool buffer_sta = ieee80211_hw_check(&local->hw,
 					     SUPPORTS_TDLS_BUFFER_STA);
 	struct ieee80211_supported_band *sband = ieee80211_get_sband(sdata);
 	bool vht = sband && sband->vht_cap.vht_supported;
 	u8 *pos = skb_put(skb, 10);
 
 	*pos++ = WLAN_EID_EXT_CAPABILITY;
 	*pos++ = 8; /* len */
 	*pos++ = 0x0;
 	*pos++ = 0x0;
 	*pos++ = 0x0;
 	*pos++ = (chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0) |
 		 (buffer_sta ? WLAN_EXT_CAPA4_TDLS_BUFFER_STA : 0);
 	*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
 	*pos++ = 0;
 	*pos++ = 0;
 	*pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0;
 }
 
 static u8
 ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata,
 			   struct sk_buff *skb, u16 start, u16 end,
 			   u16 spacing)
 {
 	u8 subband_cnt = 0, ch_cnt = 0;
 	struct ieee80211_channel *ch;
 	struct cfg80211_chan_def chandef;
 	int i, subband_start;
 	struct wiphy *wiphy = sdata->local->hw.wiphy;
 
 	for (i = start; i <= end; i += spacing) {
 		if (!ch_cnt)
 			subband_start = i;
 
 		ch = ieee80211_get_channel(sdata->local->hw.wiphy, i);
 		if (ch) {
 			/* we will be active on the channel */
 			cfg80211_chandef_create(&chandef, ch,
 						NL80211_CHAN_NO_HT);
 			if (cfg80211_reg_can_beacon_relax(wiphy, &chandef,
 							  sdata->wdev.iftype)) {
 				ch_cnt++;
 				/*
 				 * check if the next channel is also part of
 				 * this allowed range
 				 */
 				continue;
 			}
 		}
 
 		/*
 		 * we've reached the end of a range, with allowed channels
 		 * found
 		 */
 		if (ch_cnt) {
 			u8 *pos = skb_put(skb, 2);
 			*pos++ = ieee80211_frequency_to_channel(subband_start);
 			*pos++ = ch_cnt;
 
 			subband_cnt++;
 			ch_cnt = 0;
 		}
 	}
 
 	/* all channels in the requested range are allowed - add them here */
 	if (ch_cnt) {
 		u8 *pos = skb_put(skb, 2);
 		*pos++ = ieee80211_frequency_to_channel(subband_start);
 		*pos++ = ch_cnt;
 
 		subband_cnt++;
 	}
 
 	return subband_cnt;
 }
 
 static void
 ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata,
 				 struct sk_buff *skb)
 {
 	/*
 	 * Add possible channels for TDLS. These are channels that are allowed
 	 * to be active.
 	 */
 	u8 subband_cnt;
 	u8 *pos = skb_put(skb, 2);
 
 	*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
 
 	/*
 	 * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as
 	 * this doesn't happen in real world scenarios.
 	 */
 
 	/* 2GHz, with 5MHz spacing */
 	subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5);
 
 	/* 5GHz, with 20MHz spacing */
 	subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20);
 
 	/* length */
 	*pos = 2 * subband_cnt;
 }
 
 static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata,
 					    struct sk_buff *skb)
 {
 	u8 *pos;
 	u8 op_class;
 
 	if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef,
 						  &op_class))
 		return;
 
 	pos = skb_put(skb, 4);
 	*pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES;
 	*pos++ = 2; /* len */
 
 	*pos++ = op_class;
 	*pos++ = op_class; /* give current operating class as alternate too */
 }
 
 static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb)
 {
 	u8 *pos = skb_put(skb, 3);
 
 	*pos++ = WLAN_EID_BSS_COEX_2040;
 	*pos++ = 1; /* len */
 
 	*pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST;
 }
 
 static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata,
 					u16 status_code)
 {
 	struct ieee80211_supported_band *sband;
 
 	/* The capability will be 0 when sending a failure code */
 	if (status_code != 0)
 		return 0;
 
 	sband = ieee80211_get_sband(sdata);
 	if (sband && sband->band == NL80211_BAND_2GHZ) {
 		return WLAN_CAPABILITY_SHORT_SLOT_TIME |
 		       WLAN_CAPABILITY_SHORT_PREAMBLE;
 	}
 
 	return 0;
 }
 
 static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata,
 				       struct sk_buff *skb, const u8 *peer,
 				       bool initiator)
 {
 	struct ieee80211_tdls_lnkie *lnkid;
 	const u8 *init_addr, *rsp_addr;
 
 	if (initiator) {
 		init_addr = sdata->vif.addr;
 		rsp_addr = peer;
 	} else {
 		init_addr = peer;
 		rsp_addr = sdata->vif.addr;
 	}
 
 	lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
 
 	lnkid->ie_type = WLAN_EID_LINK_ID;
 	lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;
 
 	memcpy(lnkid->bssid, sdata->deflink.u.mgd.bssid, ETH_ALEN);
 	memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
 	memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
 }
 
 static void
 ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
 {
 	u8 *pos = skb_put(skb, 4);
 
 	*pos++ = WLAN_EID_AID;
 	*pos++ = 2; /* len */
 	put_unaligned_le16(sdata->vif.cfg.aid, pos);
 }
 
 /* translate numbering in the WMM parameter IE to the mac80211 notation */
 static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac)
 {
 	switch (ac) {
 	default:
 		WARN_ON_ONCE(1);
 		fallthrough;
 	case 0:
 		return IEEE80211_AC_BE;
 	case 1:
 		return IEEE80211_AC_BK;
 	case 2:
 		return IEEE80211_AC_VI;
 	case 3:
 		return IEEE80211_AC_VO;
 	}
 }
 
 static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci)
 {
 	u8 ret;
 
 	ret = aifsn & 0x0f;
 	if (acm)
 		ret |= 0x10;
 	ret |= (aci << 5) & 0x60;
 	return ret;
 }
 
 static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max)
 {
 	return ((ilog2(cw_min + 1) << 0x0) & 0x0f) |
 	       ((ilog2(cw_max + 1) << 0x4) & 0xf0);
 }
 
 static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata,
 					    struct sk_buff *skb)
 {
 	struct ieee80211_wmm_param_ie *wmm;
 	struct ieee80211_tx_queue_params *txq;
 	int i;
 
 	wmm = skb_put_zero(skb, sizeof(*wmm));
 
 	wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
 	wmm->len = sizeof(*wmm) - 2;
 
 	wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
 	wmm->oui[1] = 0x50;
 	wmm->oui[2] = 0xf2;
 	wmm->oui_type = 2; /* WME */
 	wmm->oui_subtype = 1; /* WME param */
 	wmm->version = 1; /* WME ver */
 	wmm->qos_info = 0; /* U-APSD not in use */
 
 	/*
 	 * Use the EDCA parameters defined for the BSS, or default if the AP
 	 * doesn't support it, as mandated by 802.11-2012 section 10.22.4
 	 */
 	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
 		txq = &sdata->deflink.tx_conf[ieee80211_ac_from_wmm(i)];
 		wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs,
 							       txq->acm, i);
 		wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max);
 		wmm->ac[i].txop_limit = cpu_to_le16(txq->txop);
 	}
 }
 
 static void
 ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata,
 				   struct sta_info *sta)
 {
 	/* IEEE802.11ac-2013 Table E-4 */
 	u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 };
 	struct cfg80211_chan_def uc = sta->tdls_chandef;
 	enum nl80211_chan_width max_width =
 		ieee80211_sta_cap_chan_bw(&sta->deflink);
 	int i;
 
 	/* only support upgrading non-narrow channels up to 80Mhz */
 	if (max_width == NL80211_CHAN_WIDTH_5 ||
 	    max_width == NL80211_CHAN_WIDTH_10)
 		return;
 
 	if (max_width > NL80211_CHAN_WIDTH_80)
 		max_width = NL80211_CHAN_WIDTH_80;
 
 	if (uc.width >= max_width)
 		return;
 	/*
 	 * Channel usage constrains in the IEEE802.11ac-2013 specification only
 	 * allow expanding a 20MHz channel to 80MHz in a single way. In
 	 * addition, there are no 40MHz allowed channels that are not part of
 	 * the allowed 80MHz range in the 5GHz spectrum (the relevant one here).
 	 */
 	for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++)
 		if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) {
 			uc.center_freq1 = centers_80mhz[i];
 			uc.center_freq2 = 0;
 			uc.width = NL80211_CHAN_WIDTH_80;
 			break;
 		}
 
 	if (!uc.center_freq1)
 		return;
 
 	/* proceed to downgrade the chandef until usable or the same as AP BW */
 	while (uc.width > max_width ||
 	       (uc.width > sta->tdls_chandef.width &&
 		!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &uc,
 					       sdata->wdev.iftype)))
 		ieee80211_chandef_downgrade(&uc);
 
 	if (!cfg80211_chandef_identical(&uc, &sta->tdls_chandef)) {
 		tdls_dbg(sdata, "TDLS ch width upgraded %d -> %d\n",
 			 sta->tdls_chandef.width, uc.width);
 
 		/*
 		 * the station is not yet authorized when BW upgrade is done,
 		 * locking is not required
 		 */
 		sta->tdls_chandef = uc;
 	}
 }
 
 static void
 ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata,
 				   struct sk_buff *skb, const u8 *peer,
 				   u8 action_code, bool initiator,
 				   const u8 *extra_ies, size_t extra_ies_len)
 {
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_sta_ht_cap ht_cap;
 	struct ieee80211_sta_vht_cap vht_cap;
 	struct sta_info *sta = NULL;
 	size_t offset = 0, noffset;
 	u8 *pos;
 
 	sband = ieee80211_get_sband(sdata);
 	if (!sband)
 		return;
 
 	ieee80211_add_srates_ie(sdata, skb, false, sband->band);
 	ieee80211_add_ext_srates_ie(sdata, skb, false, sband->band);
 	ieee80211_tdls_add_supp_channels(sdata, skb);
 
 	/* add any custom IEs that go before Extended Capabilities */
 	if (extra_ies_len) {
 		static const u8 before_ext_cap[] = {
 			WLAN_EID_SUPP_RATES,
 			WLAN_EID_COUNTRY,
 			WLAN_EID_EXT_SUPP_RATES,
 			WLAN_EID_SUPPORTED_CHANNELS,
 			WLAN_EID_RSN,
 		};
 		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 					     before_ext_cap,
 					     ARRAY_SIZE(before_ext_cap),
 					     offset);
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 		offset = noffset;
 	}
 
 	ieee80211_tdls_add_ext_capab(sdata, skb);
 
 	/* add the QoS element if we support it */
 	if (local->hw.queues >= IEEE80211_NUM_ACS &&
 	    action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
 		ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */
 
 	/* add any custom IEs that go before HT capabilities */
 	if (extra_ies_len) {
 		static const u8 before_ht_cap[] = {
 			WLAN_EID_SUPP_RATES,
 			WLAN_EID_COUNTRY,
 			WLAN_EID_EXT_SUPP_RATES,
 			WLAN_EID_SUPPORTED_CHANNELS,
 			WLAN_EID_RSN,
 			WLAN_EID_EXT_CAPABILITY,
 			WLAN_EID_QOS_CAPA,
 			WLAN_EID_FAST_BSS_TRANSITION,
 			WLAN_EID_TIMEOUT_INTERVAL,
 			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 		};
 		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 					     before_ht_cap,
 					     ARRAY_SIZE(before_ht_cap),
 					     offset);
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 		offset = noffset;
 	}
 
 	mutex_lock(&local->sta_mtx);
 
 	/* we should have the peer STA if we're already responding */
 	if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
 		sta = sta_info_get(sdata, peer);
 		if (WARN_ON_ONCE(!sta)) {
 			mutex_unlock(&local->sta_mtx);
 			return;
 		}
 
 		sta->tdls_chandef = sdata->vif.bss_conf.chandef;
 	}
 
 	ieee80211_tdls_add_oper_classes(sdata, skb);
 
 	/*
 	 * with TDLS we can switch channels, and HT-caps are not necessarily
 	 * the same on all bands. The specification limits the setup to a
 	 * single HT-cap, so use the current band for now.
 	 */
 	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
 
 	if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
 	     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
 	    ht_cap.ht_supported) {
 		ieee80211_apply_htcap_overrides(sdata, &ht_cap);
 
 		/* disable SMPS in TDLS initiator */
 		ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
 				<< IEEE80211_HT_CAP_SM_PS_SHIFT;
 
 		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 		ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
 	} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
 		   ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
 		/* the peer caps are already intersected with our own */
 		memcpy(&ht_cap, &sta->sta.deflink.ht_cap, sizeof(ht_cap));
 
 		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
 		ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
 	}
 
 	if (ht_cap.ht_supported &&
 	    (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
 		ieee80211_tdls_add_bss_coex_ie(skb);
 
 	ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
 
 	/* add any custom IEs that go before VHT capabilities */
 	if (extra_ies_len) {
 		static const u8 before_vht_cap[] = {
 			WLAN_EID_SUPP_RATES,
 			WLAN_EID_COUNTRY,
 			WLAN_EID_EXT_SUPP_RATES,
 			WLAN_EID_SUPPORTED_CHANNELS,
 			WLAN_EID_RSN,
 			WLAN_EID_EXT_CAPABILITY,
 			WLAN_EID_QOS_CAPA,
 			WLAN_EID_FAST_BSS_TRANSITION,
 			WLAN_EID_TIMEOUT_INTERVAL,
 			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
 			WLAN_EID_MULTI_BAND,
 		};
 		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 					     before_vht_cap,
 					     ARRAY_SIZE(before_vht_cap),
 					     offset);
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 		offset = noffset;
 	}
 
 	/* build the VHT-cap similarly to the HT-cap */
 	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
 	if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
 	     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
 	    vht_cap.vht_supported) {
 		ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
 
 		/* the AID is present only when VHT is implemented */
 		if (action_code == WLAN_TDLS_SETUP_REQUEST)
 			ieee80211_tdls_add_aid(sdata, skb);
 
 		pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 		ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
 	} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
 		   vht_cap.vht_supported && sta->sta.deflink.vht_cap.vht_supported) {
 		/* the peer caps are already intersected with our own */
 		memcpy(&vht_cap, &sta->sta.deflink.vht_cap, sizeof(vht_cap));
 
 		/* the AID is present only when VHT is implemented */
 		ieee80211_tdls_add_aid(sdata, skb);
 
 		pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
 		ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
 
 		/*
 		 * if both peers support WIDER_BW, we can expand the chandef to
 		 * a wider compatible one, up to 80MHz
 		 */
 		if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 	}
 
 	mutex_unlock(&local->sta_mtx);
 
 	/* add any remaining IEs */
 	if (extra_ies_len) {
 		noffset = extra_ies_len;
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 	}
 
 }
 
 static void
 ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
 				 struct sk_buff *skb, const u8 *peer,
 				 bool initiator, const u8 *extra_ies,
 				 size_t extra_ies_len)
 {
 	struct ieee80211_local *local = sdata->local;
 	size_t offset = 0, noffset;
 	struct sta_info *sta, *ap_sta;
 	struct ieee80211_supported_band *sband;
 	u8 *pos;
 
 	sband = ieee80211_get_sband(sdata);
 	if (!sband)
 		return;
 
 	mutex_lock(&local->sta_mtx);
 
 	sta = sta_info_get(sdata, peer);
 	ap_sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
 	if (WARN_ON_ONCE(!sta || !ap_sta)) {
 		mutex_unlock(&local->sta_mtx);
 		return;
 	}
 
 	sta->tdls_chandef = sdata->vif.bss_conf.chandef;
 
 	/* add any custom IEs that go before the QoS IE */
 	if (extra_ies_len) {
 		static const u8 before_qos[] = {
 			WLAN_EID_RSN,
 		};
 		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 					     before_qos,
 					     ARRAY_SIZE(before_qos),
 					     offset);
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 		offset = noffset;
 	}
 
 	/* add the QoS param IE if both the peer and we support it */
 	if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
 		ieee80211_tdls_add_wmm_param_ie(sdata, skb);
 
 	/* add any custom IEs that go before HT operation */
 	if (extra_ies_len) {
 		static const u8 before_ht_op[] = {
 			WLAN_EID_RSN,
 			WLAN_EID_QOS_CAPA,
 			WLAN_EID_FAST_BSS_TRANSITION,
 			WLAN_EID_TIMEOUT_INTERVAL,
 		};
 		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 					     before_ht_op,
 					     ARRAY_SIZE(before_ht_op),
 					     offset);
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 		offset = noffset;
 	}
 
 	/*
 	 * if HT support is only added in TDLS, we need an HT-operation IE.
 	 * add the IE as required by IEEE802.11-2012 9.23.3.2.
 	 */
 	if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
 		u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
 			   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
 			   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
 
 		pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
 		ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
 					   &sdata->vif.bss_conf.chandef, prot,
 					   true);
 	}
 
 	ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
 
 	/* only include VHT-operation if not on the 2.4GHz band */
 	if (sband->band != NL80211_BAND_2GHZ &&
 	    sta->sta.deflink.vht_cap.vht_supported) {
 		/*
 		 * if both peers support WIDER_BW, we can expand the chandef to
 		 * a wider compatible one, up to 80MHz
 		 */
 		if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 
 		pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
 		ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
 					    &sta->tdls_chandef);
 	}
 
 	mutex_unlock(&local->sta_mtx);
 
 	/* add any remaining IEs */
 	if (extra_ies_len) {
 		noffset = extra_ies_len;
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 	}
 }
 
 static void
 ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata,
 				       struct sk_buff *skb, const u8 *peer,
 				       bool initiator, const u8 *extra_ies,
 				       size_t extra_ies_len, u8 oper_class,
 				       struct cfg80211_chan_def *chandef)
 {
 	struct ieee80211_tdls_data *tf;
 	size_t offset = 0, noffset;
 
 	if (WARN_ON_ONCE(!chandef))
 		return;
 
 	tf = (void *)skb->data;
 	tf->u.chan_switch_req.target_channel =
 		ieee80211_frequency_to_channel(chandef->chan->center_freq);
 	tf->u.chan_switch_req.oper_class = oper_class;
 
 	if (extra_ies_len) {
 		static const u8 before_lnkie[] = {
 			WLAN_EID_SECONDARY_CHANNEL_OFFSET,
 		};
 		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 					     before_lnkie,
 					     ARRAY_SIZE(before_lnkie),
 					     offset);
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 		offset = noffset;
 	}
 
 	ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
 
 	/* add any remaining IEs */
 	if (extra_ies_len) {
 		noffset = extra_ies_len;
 		skb_put_data(skb, extra_ies + offset, noffset - offset);
 	}
 }
 
 static void
 ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata,
 					struct sk_buff *skb, const u8 *peer,
 					u16 status_code, bool initiator,
 					const u8 *extra_ies,
 					size_t extra_ies_len)
 {
 	if (status_code == 0)
 		ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
 
 	if (extra_ies_len)
 		skb_put_data(skb, extra_ies, extra_ies_len);
 }
 
 static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
 				   struct sk_buff *skb, const u8 *peer,
 				   u8 action_code, u16 status_code,
 				   bool initiator, const u8 *extra_ies,
 				   size_t extra_ies_len, u8 oper_class,
 				   struct cfg80211_chan_def *chandef)
 {
 	switch (action_code) {
 	case WLAN_TDLS_SETUP_REQUEST:
 	case WLAN_TDLS_SETUP_RESPONSE:
 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 		if (status_code == 0)
 			ieee80211_tdls_add_setup_start_ies(sdata, skb, peer,
 							   action_code,
 							   initiator,
 							   extra_ies,
 							   extra_ies_len);
 		break;
 	case WLAN_TDLS_SETUP_CONFIRM:
 		if (status_code == 0)
 			ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer,
 							 initiator, extra_ies,
 							 extra_ies_len);
 		break;
 	case WLAN_TDLS_TEARDOWN:
 	case WLAN_TDLS_DISCOVERY_REQUEST:
 		if (extra_ies_len)
 			skb_put_data(skb, extra_ies, extra_ies_len);
 		if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
 			ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
 		break;
 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 		ieee80211_tdls_add_chan_switch_req_ies(sdata, skb, peer,
 						       initiator, extra_ies,
 						       extra_ies_len,
 						       oper_class, chandef);
 		break;
 	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 		ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer,
 							status_code,
 							initiator, extra_ies,
 							extra_ies_len);
 		break;
 	}
 
 }
 
 static int
 ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 			       const u8 *peer, u8 action_code, u8 dialog_token,
 			       u16 status_code, struct sk_buff *skb)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct ieee80211_tdls_data *tf;
 
 	tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
 
 	memcpy(tf->da, peer, ETH_ALEN);
 	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
 	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
 	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
 
 	/* network header is after the ethernet header */
 	skb_set_network_header(skb, ETH_HLEN);
 
 	switch (action_code) {
 	case WLAN_TDLS_SETUP_REQUEST:
 		tf->category = WLAN_CATEGORY_TDLS;
 		tf->action_code = WLAN_TDLS_SETUP_REQUEST;
 
 		skb_put(skb, sizeof(tf->u.setup_req));
 		tf->u.setup_req.dialog_token = dialog_token;
 		tf->u.setup_req.capability =
 			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
 								 status_code));
 		break;
 	case WLAN_TDLS_SETUP_RESPONSE:
 		tf->category = WLAN_CATEGORY_TDLS;
 		tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
 
 		skb_put(skb, sizeof(tf->u.setup_resp));
 		tf->u.setup_resp.status_code = cpu_to_le16(status_code);
 		tf->u.setup_resp.dialog_token = dialog_token;
 		tf->u.setup_resp.capability =
 			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
 								 status_code));
 		break;
 	case WLAN_TDLS_SETUP_CONFIRM:
 		tf->category = WLAN_CATEGORY_TDLS;
 		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
 
 		skb_put(skb, sizeof(tf->u.setup_cfm));
 		tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
 		tf->u.setup_cfm.dialog_token = dialog_token;
 		break;
 	case WLAN_TDLS_TEARDOWN:
 		tf->category = WLAN_CATEGORY_TDLS;
 		tf->action_code = WLAN_TDLS_TEARDOWN;
 
 		skb_put(skb, sizeof(tf->u.teardown));
 		tf->u.teardown.reason_code = cpu_to_le16(status_code);
 		break;
 	case WLAN_TDLS_DISCOVERY_REQUEST:
 		tf->category = WLAN_CATEGORY_TDLS;
 		tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
 
 		skb_put(skb, sizeof(tf->u.discover_req));
 		tf->u.discover_req.dialog_token = dialog_token;
 		break;
 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 		tf->category = WLAN_CATEGORY_TDLS;
 		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
 
 		skb_put(skb, sizeof(tf->u.chan_switch_req));
 		break;
 	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 		tf->category = WLAN_CATEGORY_TDLS;
 		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
 
 		skb_put(skb, sizeof(tf->u.chan_switch_resp));
 		tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
 		break;
 	default:
 		return -EINVAL;
 	}
 
 	return 0;
 }
 
 static int
 ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
 			   const u8 *peer, u8 action_code, u8 dialog_token,
 			   u16 status_code, struct sk_buff *skb)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct ieee80211_mgmt *mgmt;
 
 	mgmt = skb_put_zero(skb, 24);
 	memcpy(mgmt->da, peer, ETH_ALEN);
 	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
 	memcpy(mgmt->bssid, sdata->deflink.u.mgd.bssid, ETH_ALEN);
 
 	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 					  IEEE80211_STYPE_ACTION);
 
 	switch (action_code) {
 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 		skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp));
 		mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
 		mgmt->u.action.u.tdls_discover_resp.action_code =
 			WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
 		mgmt->u.action.u.tdls_discover_resp.dialog_token =
 			dialog_token;
 		mgmt->u.action.u.tdls_discover_resp.capability =
 			cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata,
 								 status_code));
 		break;
 	default:
 		return -EINVAL;
 	}
 
 	return 0;
 }
 
 static struct sk_buff *
 ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 				      const u8 *peer, u8 action_code,
 				      u8 dialog_token, u16 status_code,
 				      bool initiator, const u8 *extra_ies,
 				      size_t extra_ies_len, u8 oper_class,
 				      struct cfg80211_chan_def *chandef)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct sk_buff *skb;
 	int ret;
 
 	skb = netdev_alloc_skb(sdata->dev,
 			       local->hw.extra_tx_headroom +
 			       max(sizeof(struct ieee80211_mgmt),
 				   sizeof(struct ieee80211_tdls_data)) +
 			       50 + /* supported rates */
 			       10 + /* ext capab */
 			       26 + /* max(WMM-info, WMM-param) */
 			       2 + max(sizeof(struct ieee80211_ht_cap),
 				       sizeof(struct ieee80211_ht_operation)) +
 			       2 + max(sizeof(struct ieee80211_vht_cap),
 				       sizeof(struct ieee80211_vht_operation)) +
 			       50 + /* supported channels */
 			       3 + /* 40/20 BSS coex */
 			       4 + /* AID */
 			       4 + /* oper classes */
 			       extra_ies_len +
 			       sizeof(struct ieee80211_tdls_lnkie));
 	if (!skb)
 		return NULL;
 
 	skb_reserve(skb, local->hw.extra_tx_headroom);
 
 	switch (action_code) {
 	case WLAN_TDLS_SETUP_REQUEST:
 	case WLAN_TDLS_SETUP_RESPONSE:
 	case WLAN_TDLS_SETUP_CONFIRM:
 	case WLAN_TDLS_TEARDOWN:
 	case WLAN_TDLS_DISCOVERY_REQUEST:
 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 		ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
 						     sdata->dev, peer,
 						     action_code, dialog_token,
 						     status_code, skb);
 		break;
 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 		ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
 						 peer, action_code,
 						 dialog_token, status_code,
 						 skb);
 		break;
 	default:
 		ret = -ENOTSUPP;
 		break;
 	}
 
 	if (ret < 0)
 		goto fail;
 
 	ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code,
 			       initiator, extra_ies, extra_ies_len, oper_class,
 			       chandef);
 	return skb;
 
 fail:
 	dev_kfree_skb(skb);
 	return NULL;
 }
 
 static int
 ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 				const u8 *peer, u8 action_code, u8 dialog_token,
 				u16 status_code, u32 peer_capability,
 				bool initiator, const u8 *extra_ies,
 				size_t extra_ies_len, u8 oper_class,
 				struct cfg80211_chan_def *chandef)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 	struct sk_buff *skb = NULL;
 	struct sta_info *sta;
 	u32 flags = 0;
 	int ret = 0;
 
 	rcu_read_lock();
 	sta = sta_info_get(sdata, peer);
 
 	/* infer the initiator if we can, to support old userspace */
 	switch (action_code) {
 	case WLAN_TDLS_SETUP_REQUEST:
 		if (sta) {
 			set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
 			sta->sta.tdls_initiator = false;
 		}
 		fallthrough;
 	case WLAN_TDLS_SETUP_CONFIRM:
 	case WLAN_TDLS_DISCOVERY_REQUEST:
 		initiator = true;
 		break;
 	case WLAN_TDLS_SETUP_RESPONSE:
 		/*
 		 * In some testing scenarios, we send a request and response.
 		 * Make the last packet sent take effect for the initiator
 		 * value.
 		 */
 		if (sta) {
 			clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
 			sta->sta.tdls_initiator = true;
 		}
 		fallthrough;
 	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 		initiator = false;
 		break;
 	case WLAN_TDLS_TEARDOWN:
 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 		/* any value is ok */
 		break;
 	default:
 		ret = -ENOTSUPP;
 		break;
 	}
 
 	if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
 		initiator = true;
 
 	rcu_read_unlock();
 	if (ret < 0)
 		goto fail;
 
 	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer, action_code,
 						    dialog_token, status_code,
 						    initiator, extra_ies,
 						    extra_ies_len, oper_class,
 						    chandef);
 	if (!skb) {
 		ret = -EINVAL;
 		goto fail;
 	}
 
]
]

gemini-3-flash-preview

							input: 59148
							output: 716
							thoughts: 916
						

**Analysis of the Kernel Warning in `ieee80211_tdls_add_setup_cfm_ies`**

Okay, let me break this down. My initial observation confirms the `WARN_ON_ONCE` in the code is reachable from userspace, which is a problem. Specifically, the warning arises in `ieee80211_tdls_add_setup_cfm_ies` when either `sta` (the peer's station info) or `ap_sta` (the AP's station info) is NULL. The core issue is a TDLS Setup Confirm message is received from userspace (via `NL80211_CMD_TDLS_MGMT`) referring to a peer that isn't validly represented in the kernel's internal data structures.

The key question is, what's the actual impact? Well, it's not a memory corruption scenario, as the code explicitly checks for NULL pointers and returns early. That's good, it prevents a more severe issue like a kernel panic due to a NULL pointer dereference. The function just returns. The TDLS Setup Confirm then fails which is expected since it was not valid to begin with.

So, the worst case scenario is *not* a crash due to NULL pointer dereference. The worst case scenario is, instead, a kernel warning in `dmesg`. However, if `panic_on_warn` is enabled (which is common in some hardened or testing environments) then a kernel panic is triggered, resulting in a Denial of Service (DoS). The function returns a truncated TDLS packet, but that is expected with invalid parameters.

I need to confirm if there are other scenarios where `sta` or `ap_sta` could be NULL. `ap_sta` is obtained using `sdata->vif.cfg.ap_addr` which is the BSSID of the Access Point. If `sdata->u.mgd.associated` is false, it's immediately caught in another check, so that's not the issue. However, if the station is associated but the AP station info is removed due to a disassociation, then there could be a race condition. Thus `ap_sta` could be NULL. The most likely trigger, however, remains an invalid MAC address for the `peer`.

Therefore, the warning is triggered if `sta` or `ap_sta` is NULL. It's benign, *unless* `panic_on_warn` is set, in which case it is DoS, or the AP is removed but the station is still associated, causing a race condition. It's a bug that userspace can trigger a warning, and I'd recommend replacing `WARN_ON_ONCE` with either a silent error return or a `pr_debug`.

gemini-3.1-pro-preview

							input: 89653
							output: 66
							thoughts: 0
						

map[DenialOfService:false Exploitable:false FilesystemTrigger:false NetworkTrigger:false PeripheralTrigger:false RemoteTrigger:false Unprivileged:false UserNamespace:true VMGuestTrigger:false VMHostTrigger:false]

map[DenialOfService:false Exploitable:false FilesystemTrigger:false NetworkTrigger:false PeripheralTrigger:false RemoteTrigger:false Unprivileged:false UserNamespace:true VMGuestTrigger:false VMHostTrigger:false]

gemini-3.1-pro-preview

							input: 89783
							output: 57
							thoughts: 0
						

map[Question:Is it possible to trigger this bug remotely? The bug is in TDLS management frame processing. TDLS frames are sent over the air. Can a remote attacker send a crafted TDLS frame to trigger this warning?]

map[Answer:The investigation into the TDLS (Tunneled Direct Link Setup) management frame processing in `net/mac80211/tdls.c` and `net/mac80211/rx.c` confirms that the `WARN_ON_ONCE(1)` in the `default` case of `ieee80211_process_tdls_channel_switch` is indeed remotely triggerable due to Use-After-Free (UAF) vulnerabilities.

### 1. Analysis of the Vulnerabilities

There are two distinct Use-After-Free bugs that can lead to this warning:

#### A. UAF in the Receive Path (`net/mac80211/rx.c`)
In `ieee80211_rx_h_data`, a pointer `tf` is assigned to the skb data before calling `pskb_may_pull`:
```c
3303:    struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
3304:
3305:    if (pskb_may_pull(rx->skb, offsetof(struct ieee80211_tdls_data, u)) &&
3306:        tf->payload_type == WLAN_TDLS_SNAP_RFTYPE && ...
```
If `pskb_may_pull` reallocates the skb's data buffer (which happens if the requested length exceeds the current linear head), the `tf` pointer becomes stale. Subsequent accesses to `tf->payload_type`, `tf->category`, and `tf->action_code` read from freed memory.

#### B. UAF in the TDLS Worker (`net/mac80211/tdls.c`)
In `ieee80211_process_tdls_channel_switch`, a similar pattern exists:
```c
2009:    struct ieee80211_tdls_data *tf = (void *)skb->data;
...
2019:    if (skb_linearize(skb))
2020:        return;
...
2025:    switch (tf->action_code) {
```
If `skb_linearize` reallocates the buffer (which happens if the skb is non-linear), `tf` becomes a dangling pointer. The `switch` statement then performs a UAF read on `tf->action_code`.

### 2. Remote Triggering Mechanism

A remote attacker can trigger the `WARN_ON_ONCE(1)` by sending a crafted TDLS frame:

1.  **Crafting the Frame:** The attacker sends a TDLS frame (e.g., a Setup Request) encapsulated in a data frame. To ensure the skb is non-linear, the attacker can include a large number of dummy Information Elements (IEs), making the frame large enough to be fragmented or stored in paged memory by the driver.
2.  **Exploiting the RX UAF:** If the frame is received such that the TDLS header crosses a buffer boundary, `pskb_may_pull` in `rx.c` will reallocate. If the attacker can influence the contents of the freed memory (e.g., via heap spraying or simply relying on memory reuse), they can trick the check at lines 3307-3310 into thinking the frame is a `WLAN_TDLS_CHANNEL_SWITCH_REQUEST`.
3.  **Queuing the Frame:** Because the check passed (due to the UAF), the frame is queued to the interface worker with `skb->protocol = ETH_P_TDLS`.
4.  **Triggering the Warning:** The worker calls `ieee80211_process_tdls_channel_switch`. This function accesses the *real* data (via the updated `skb->data` in the sub-functions or after its own linearization). Since the real `action_code` is not a channel switch code (it was a Setup Request), the `switch` statement hits the `default` case and triggers the `WARN_ON_ONCE(1)`.

### 3. Conclusion

The bug is **remotely triggerable**. An attacker can send a crafted, non-linear TDLS frame to exploit the UAF in the receive path, bypassing the action code validation and reaching the unreachable code path in the TDLS worker, thereby triggering the warning. This vulnerability highlights a common pitfall in network stack programming where pointers to skb data are held across functions that may reallocate the underlying buffer.]

gemini-3-flash-preview

You are a capable Linux kernel developer tasked with researching complex questions
about kernel source code. You will be given a concrete question, and need to provide
a concrete answer.
Use tools extensively while researching the question. Don't make assumptions,
or rely on your previous knowledge about the kernel source code, use available tools
to access the actual source code.
Use all available sources of information:
 - kernel source code
 - documentation in the Documentation dir in the source tree
 - git commits descriptions, git blame

Prefer calling several tools at the same time to save round-trips.

Is it possible to trigger this bug remotely? The bug is in TDLS management frame processing. TDLS frames are sent over the air. Can a remote attacker send a crafted TDLS frame to trigger this warning?

The investigation into the TDLS (Tunneled Direct Link Setup) management frame processing in `net/mac80211/tdls.c` and `net/mac80211/rx.c` confirms that the `WARN_ON_ONCE(1)` in the `default` case of `ieee80211_process_tdls_channel_switch` is indeed remotely triggerable due to Use-After-Free (UAF) vulnerabilities.

### 1. Analysis of the Vulnerabilities

There are two distinct Use-After-Free bugs that can lead to this warning:

#### A. UAF in the Receive Path (`net/mac80211/rx.c`)
In `ieee80211_rx_h_data`, a pointer `tf` is assigned to the skb data before calling `pskb_may_pull`:
```c
3303:    struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
3304:
3305:    if (pskb_may_pull(rx->skb, offsetof(struct ieee80211_tdls_data, u)) &&
3306:        tf->payload_type == WLAN_TDLS_SNAP_RFTYPE && ...
```
If `pskb_may_pull` reallocates the skb's data buffer (which happens if the requested length exceeds the current linear head), the `tf` pointer becomes stale. Subsequent accesses to `tf->payload_type`, `tf->category`, and `tf->action_code` read from freed memory.

#### B. UAF in the TDLS Worker (`net/mac80211/tdls.c`)
In `ieee80211_process_tdls_channel_switch`, a similar pattern exists:
```c
2009:    struct ieee80211_tdls_data *tf = (void *)skb->data;
...
2019:    if (skb_linearize(skb))
2020:        return;
...
2025:    switch (tf->action_code) {
```
If `skb_linearize` reallocates the buffer (which happens if the skb is non-linear), `tf` becomes a dangling pointer. The `switch` statement then performs a UAF read on `tf->action_code`.

### 2. Remote Triggering Mechanism

A remote attacker can trigger the `WARN_ON_ONCE(1)` by sending a crafted TDLS frame:

1.  **Crafting the Frame:** The attacker sends a TDLS frame (e.g., a Setup Request) encapsulated in a data frame. To ensure the skb is non-linear, the attacker can include a large number of dummy Information Elements (IEs), making the frame large enough to be fragmented or stored in paged memory by the driver.
2.  **Exploiting the RX UAF:** If the frame is received such that the TDLS header crosses a buffer boundary, `pskb_may_pull` in `rx.c` will reallocate. If the attacker can influence the contents of the freed memory (e.g., via heap spraying or simply relying on memory reuse), they can trick the check at lines 3307-3310 into thinking the frame is a `WLAN_TDLS_CHANNEL_SWITCH_REQUEST`.
3.  **Queuing the Frame:** Because the check passed (due to the UAF), the frame is queued to the interface worker with `skb->protocol = ETH_P_TDLS`.
4.  **Triggering the Warning:** The worker calls `ieee80211_process_tdls_channel_switch`. This function accesses the *real* data (via the updated `skb->data` in the sub-functions or after its own linearization). Since the real `action_code` is not a channel switch code (it was a Setup Request), the `switch` statement hits the `default` case and triggers the `WARN_ON_ONCE(1)`.

### 3. Conclusion

The bug is **remotely triggerable**. An attacker can send a crafted, non-linear TDLS frame to exploit the UAF in the receive path, bypassing the action code validation and reaching the unreachable code path in the TDLS worker, thereby triggering the warning. This vulnerability highlights a common pitfall in network stack programming where pointers to skb data are held across functions that may reallocate the underlying buffer.

gemini-3-flash-preview

							input: 3239
							output: 21
							thoughts: 383
						

**Analyzing the Remote Triggerability of a Linux Kernel TDLS Bug**

Okay, so I'm presented with a question about the remote triggerability of *this bug* in the Linux kernel's TDLS management frame processing. My initial thought is, "Okay, first things first, what *is* 'this bug'?" The user mentions a warning being triggered, but that's all the detail I've been given. 

I'm an AI assistant, and I *might* have some conversational context from a prior turn, but given this is the first message in this session and the prompt says to provide a concrete answer to a concrete question, I clearly need more information. The user hasn't given me a link, a CVE, or a commit hash - I'm missing the context of "this bug." 

I need to figure out what they're talking about. I’ll search for TDLS-related commits or bug reports. Often, these kinds of bugs involve `cfg80211` or `mac80211`, but that's just a general starting point.

The question explicitly asks about *remote* triggerability. So, I need to focus on aspects that might be remotely exploitable. Let's start with a broader search. I’ll search the kernel for "TDLS management frame" and "warning." Alternatively, I'll search for recent commits related to TDLS.

Ah, wait. Before I dive into searching, I should double-check for any explicit reference to a CVE or specific bug report within the provided context, even if I have to broaden my search based on "warning". Since I'm starting from scratch here, and I don't have a specific bug identified, I need to understand what "warning" they're talking about, so I will start by searching for TDLS management frame processing code and seeing if there are any recent fixes that address warnings.

Okay, let's also remember that TDLS frames are often handled in `net/wireless/tdls.c` or similar places in the kernel. So, I'll start by searching in that vicinity. So, let's begin by searching for "TDLS management frame processing" in the kernel source code. I need to establish a starting point.

map[Dir:net/wireless]

map[Files:[ap.c chan.c core.c core.h debugfs.c debugfs.h ethtool.c ibss.c mesh.c mlme.c nl80211.c nl80211.h ocb.c of.c pmsr.c radiotap.c rdev-ops.h reg.c reg.h scan.c shipped-certs.c sme.c sysfs.c sysfs.h trace.c trace.h util.c wext-compat.c wext-compat.h wext-core.c wext-priv.c wext-proc.c wext-sme.c] Subdirs:[certs tests]]

gemini-3-flash-preview

							input: 4394
							output: 26
							thoughts: 30
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, and delivered as a first-person summary:

**Digging into the Wireless Subsystem**

Alright, I'm working with something that looks like it's wireless-related, probably driver or MAC-layer code. The initial instinct is to go straight to `net/wireless` since that's the obvious home for most of the higher-level wireless stack. However, I can't find `tdls.c` there, which is a bit unusual, so that suggests it might be handled at a lower level. My immediate thought is to switch gears and check within `net/mac80211`. That's where a lot of the core 802.11 functionality, and potentially link-layer details I might need, is located. It's a good bet given my experience that it's in `mac80211` or deeply integrated with some module within `mac80211`. Time to dive in and see what I can uncover.

map[Dir:net/mac80211]

map[Files:[aead_api.c aead_api.h aes_ccm.h aes_cmac.c aes_cmac.h aes_gcm.h aes_gmac.c aes_gmac.h agg-rx.c agg-tx.c airtime.c cfg.c chan.c debug.h debugfs.c debugfs.h debugfs_key.c debugfs_key.h debugfs_netdev.c debugfs_netdev.h debugfs_sta.c debugfs_sta.h driver-ops.c driver-ops.h drop.h eht.c ethtool.c fils_aead.c fils_aead.h he.c ht.c ibss.c ieee80211_i.h iface.c key.c key.h led.c led.h link.c main.c mesh.c mesh.h mesh_hwmp.c mesh_pathtbl.c mesh_plink.c mesh_ps.c mesh_sync.c michael.c michael.h mlme.c ocb.c offchannel.c parse.c pm.c rate.c rate.h rc80211_minstrel_ht.c rc80211_minstrel_ht.h rc80211_minstrel_ht_debugfs.c rx.c s1g.c scan.c spectmgmt.c sta_info.c sta_info.h status.c tdls.c tkip.c tkip.h trace.c trace.h trace_msg.h tx.c uhr.c util.c vht.c wbrf.c wep.c wep.h wme.c wme.h wpa.c wpa.h] Subdirs:[tests]]

gemini-3-flash-preview

							input: 5341
							output: 17
							thoughts: 71
						

Here's my thought process, distilled:

**Digging into the TDLS Subsystem for Potential Vulnerabilities**

Alright, so `net/mac80211/tdls.c` is the likely place to start looking for issues related to TDLS. My goal here is to identify a potential bug or warning related to how TDLS management frames are processed. Time to leverage my expertise and get granular. I'm going to leverage my familiarity with the codebase and do a quick search within that file for the strings "TDLS" and "WARN". This is my breadcrumb trail to see if any obvious red flags or potential areas for further scrutiny present themselves immediately. From there, I'll dive deeper.

map[Expression:WARN|BUG]

map[Output:
Full output is too long, showing 500 out of 525092 lines.
Use more precise expression if possible.

[Documentation/ABI/testing/configfs-usb-gadget-mass-storage=4=Description:
 --
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage-12-				are 2..4. Available only if
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage:13:				CONFIG_USB_GADGET_DEBUG_FILES is set.
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage-14-		===========	==============================================
 --
 Documentation/ABI/testing/ima_policy=4=Description:
 --
 Documentation/ABI/testing/ima_policy-87-			dont_appraise fsmagic=0x62656572
 Documentation/ABI/testing/ima_policy:88:			# DEBUGFS_MAGIC
 Documentation/ABI/testing/ima_policy-89-			dont_measure fsmagic=0x64626720
 --
 Documentation/ABI/testing/sysfs-class-thermal=101=Description:
 --
 Documentation/ABI/testing/sysfs-class-thermal-113-
 Documentation/ABI/testing/sysfs-class-thermal:114:		WARNING:
 Documentation/ABI/testing/sysfs-class-thermal-115-		    Be careful while enabling this option on production systems,
 --
 Documentation/ABI/testing/sysfs-driver-st=5=Description:
 --
 Documentation/ABI/testing/sysfs-driver-st-8-		Note that debug output requires that the module be compiled
 Documentation/ABI/testing/sysfs-driver-st:9:		with the #define DEBUG set to a non-zero value (this is the
 Documentation/ABI/testing/sysfs-driver-st:10:		default). If DEBUG is set to 0 then this file will not
 Documentation/ABI/testing/sysfs-driver-st-11-		appear in sysfs as its presence is conditional upon debug
 --
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl=83=Description:
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl-84-		The file used to write BlueField boot log with the format
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl:85:                "[INFO|WARN|ERR|ASSERT ]<msg>". Log level 'INFO' is used by
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl-86-                default if not specified.
 --
 Documentation/Kconfig=3=menu "Documentation"
 Documentation/Kconfig-4-
 Documentation/Kconfig:5:config WARN_MISSING_DOCUMENTS
 Documentation/Kconfig-6-	bool "Warn if there's a missing documentation file"
 --
 Documentation/Kconfig-14-
 Documentation/Kconfig:15:config WARN_ABI_ERRORS
 Documentation/Kconfig-16-	bool "Warn if there are errors at ABI files"
 --
 Documentation/Makefile=8=ifneq ($(MAKECMDGOALS),cleandocs)
 Documentation/Makefile-9-# Check for broken documentation file references
 Documentation/Makefile:10:ifeq ($(CONFIG_WARN_MISSING_DOCUMENTS),y)
 Documentation/Makefile-11-$(shell $(srctree)/tools/docs/documentation-file-ref-check --warn)
 Documentation/Makefile=12=endif
 --
 Documentation/Makefile-14-# Check for broken ABI files
 Documentation/Makefile:15:ifeq ($(CONFIG_WARN_ABI_ERRORS),y)
 Documentation/Makefile-16-$(shell $(srctree)/tools/docs/get_abi.py --dir $(srctree)/Documentation/ABI validate)
 --
 Documentation/PCI/pci.rst=200=the PCI device by calling pci_enable_device(). This will:
 --
 Documentation/PCI/pci.rst-209-.. warning::
 Documentation/PCI/pci.rst:210:   OS BUG: we don't check resource allocations before enabling those
 Documentation/PCI/pci.rst-211-   resources. The sequence would make more sense if we called
 --
 Documentation/PCI/pci.rst=250=The idea is to prevent two devices colliding on the same address range.
 --
 Documentation/PCI/pci.rst-252-.. tip::
 Documentation/PCI/pci.rst:253:   See OS BUG comment above. Currently (2.6.19), The driver can only
 Documentation/PCI/pci.rst-254-   determine MMIO and IO Port resource availability _after_ calling
 --
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=78=lock-acquisition and lock-release functions::
 --
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-104-   25
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:105:   26 WARN_ON(r1 == 0 && r2 == 0 && r3 == 0);
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-106-
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:107:The ``WARN_ON()`` is evaluated at "the end of time",
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-108-after all changes have propagated throughout the system.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=109=Without the ``smp_mb__after_unlock_lock()`` provided by the
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:110:acquisition functions, this ``WARN_ON()`` could trigger, for example
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-111-on PowerPC.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=112=The ``smp_mb__after_unlock_lock()`` invocations prevent this
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:113:``WARN_ON()`` from triggering.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-114-
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=203=non-\ ``NULL``, locklessly accessing the ``->a`` and ``->b`` fields.
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-218-      12   p->b = a;
 Documentation/RCU/Design/Requirements/Requirements.rst:219:      13   gp = p; /* ORDERING BUG */
 Documentation/RCU/Design/Requirements/Requirements.rst-220-      14   spin_unlock(&gp_lock);
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=225=their rights to reorder this code as follows:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-238-      10   }
 Documentation/RCU/Design/Requirements/Requirements.rst:239:      11   gp = p; /* ORDERING BUG */
 Documentation/RCU/Design/Requirements/Requirements.rst-240-      12   p->a = a;
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=755=example illustrates this:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-765-       7     r2 = READ_ONCE(x);
 Documentation/RCU/Design/Requirements/Requirements.rst:766:       8     WARN_ON(!r2); /* BUG!!! */
 Documentation/RCU/Design/Requirements/Requirements.rst-767-       9   }
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=779=If the thread0() function's rcu_read_lock() excluded the
 Documentation/RCU/Design/Requirements/Requirements.rst:780:thread1() function's update, the WARN_ON() could never fire. But
 Documentation/RCU/Design/Requirements/Requirements.rst-781-the fact is that rcu_read_lock() does not exclude much of anything
 Documentation/RCU/Design/Requirements/Requirements.rst=782=aside from subsequent grace periods, of which thread1() has none, so
 Documentation/RCU/Design/Requirements/Requirements.rst:783:the WARN_ON() can and does fire.
 Documentation/RCU/Design/Requirements/Requirements.rst-784-
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=1585=against mishaps and misuse:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-1615-   needed `patch series <https://lwn.net/Articles/376011/>`__.
 Documentation/RCU/Design/Requirements/Requirements.rst:1616:#. Kernels built with ``CONFIG_DEBUG_OBJECTS_RCU_HEAD=y`` will splat if
 Documentation/RCU/Design/Requirements/Requirements.rst-1617-   a data element is passed to call_rcu() twice in a row, without a
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=2156=the following:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-2161-       2 p = rcu_dereference(gp);
 Documentation/RCU/Design/Requirements/Requirements.rst:2162:       3 get_user(user_v, user_p); // BUG: POSSIBLE PAGE FAULT!!!
 Documentation/RCU/Design/Requirements/Requirements.rst-2163-       4 v = p->value;
 --
 Documentation/RCU/checklist.rst=12=over a rather long period of time, but improvements are always welcome!
 --
 Documentation/RCU/checklist.rst-488-
 Documentation/RCU/checklist.rst:489:16.	Use CONFIG_PROVE_LOCKING, CONFIG_DEBUG_OBJECTS_RCU_HEAD, and the
 Documentation/RCU/checklist.rst-490-	__rcu sparse checks to validate your RCU code.	These can help
 --
 Documentation/RCU/checklist.rst-498-
 Documentation/RCU/checklist.rst:499:	CONFIG_DEBUG_OBJECTS_RCU_HEAD:
 Documentation/RCU/checklist.rst-500-		check that you don't pass the same object to call_rcu()
 --
 Documentation/RCU/lockdep-splat.rst=21=has long since been fixed::
 --
 Documentation/RCU/lockdep-splat.rst-23-    =============================
 Documentation/RCU/lockdep-splat.rst:24:    WARNING: suspicious RCU usage
 Documentation/RCU/lockdep-splat.rst-25-    -----------------------------
 --
 Documentation/RCU/lockdep.rst=24=These functions are conservative, and will therefore return 1 if they
 Documentation/RCU/lockdep.rst:25:aren't certain (for example, if CONFIG_DEBUG_LOCK_ALLOC is not set).
 Documentation/RCU/lockdep.rst:26:This prevents things like WARN_ON(!rcu_read_lock_held()) from giving false
 Documentation/RCU/lockdep.rst-27-positives when lockdep is disabled.
 --
 Documentation/RCU/rcu_dereference.rst=25=readers working properly:
 --
 Documentation/RCU/rcu_dereference.rst-98-		q += p > &oom_p;
 Documentation/RCU/rcu_dereference.rst:99:		r1 = *q;  /* BUGGY!!! */
 Documentation/RCU/rcu_dereference.rst-100-
 --
 Documentation/RCU/rcu_dereference.rst-188-		of such an RCU usage bug is shown in the section titled
 Documentation/RCU/rcu_dereference.rst:189:		"EXAMPLE OF AMPLIFIED RCU-USAGE BUG".
 Documentation/RCU/rcu_dereference.rst-190-
 --
 Documentation/RCU/rcu_dereference.rst-218-
 Documentation/RCU/rcu_dereference.rst:219:EXAMPLE OF AMPLIFIED RCU-USAGE BUG
 Documentation/RCU/rcu_dereference.rst-220-----------------------------------
 --
 Documentation/RCU/rcubarrier.rst=194=The original code for rcu_barrier() was roughly as follows::
 --
 Documentation/RCU/rcubarrier.rst-197-  2  {
 Documentation/RCU/rcubarrier.rst:198:  3    BUG_ON(in_interrupt());
 Documentation/RCU/rcubarrier.rst-199-  4    /* Take cpucontrol mutex to protect against CPU hotplug */
 --
 Documentation/RCU/stallwarn.rst=18=warnings:
 --
 Documentation/RCU/stallwarn.rst-112-	ct_irq_enter() or ct_irq_exit(), respectively.  Building your
 Documentation/RCU/stallwarn.rst:113:	kernel with CONFIG_RCU_EQS_DEBUG=y can help track down these types
 Documentation/RCU/stallwarn.rst-114-	of issues, which sometimes arise in architecture-specific code.
 --
 Documentation/RCU/torture.rst=208=Sometimes additional debugging is useful, and in such cases the --kconfig
 Documentation/RCU/torture.rst:209:parameter to kvm.sh may be used, for example, ``--kconfig 'CONFIG_RCU_EQS_DEBUG=y'``.
 Documentation/RCU/torture.rst-210-In addition, there are the --gdb, --kasan, and --kcsan parameters.
 --
 Documentation/RCU/whatisRCU.rst=278=rcu_dereference()
 --
 Documentation/RCU/whatisRCU.rst-324-		rcu_read_unlock();
 Documentation/RCU/whatisRCU.rst:325:		x = p->address;	/* BUG!!! */
 Documentation/RCU/whatisRCU.rst-326-		rcu_read_lock();
 Documentation/RCU/whatisRCU.rst:327:		y = p->data;	/* BUG!!! */
 Documentation/RCU/whatisRCU.rst-328-		rcu_read_unlock();
 --
 Documentation/RCU/whatisRCU.rst=1237=All: lockdep-checked RCU utility APIs::
 Documentation/RCU/whatisRCU.rst-1238-
 Documentation/RCU/whatisRCU.rst:1239:	RCU_LOCKDEP_WARN
 Documentation/RCU/whatisRCU.rst-1240-	rcu_sleep_check
 --
 Documentation/accel/qaic/aic100.rst=187=of the defined channels, and their uses.
 --
 Documentation/accel/qaic/aic100.rst-221-+----------------+---------+----------+----------------------------------------+
 Documentation/accel/qaic/aic100.rst:222:| QAIC_DEBUG     | 18 & 19 | AMSS     | Not used.                              |
 Documentation/accel/qaic/aic100.rst-223-+----------------+---------+----------+----------------------------------------+
 --
 Documentation/admin-guide/LSM/ipe.rst=622=boot_verified
 --
 Documentation/admin-guide/LSM/ipe.rst-630-
 Documentation/admin-guide/LSM/ipe.rst:631:   .. WARNING::
 Documentation/admin-guide/LSM/ipe.rst-632-
 --
 Documentation/admin-guide/blockdev/zram.rst=33=Following shows a typical sequence of steps for using zram.
 Documentation/admin-guide/blockdev/zram.rst-34-
 Documentation/admin-guide/blockdev/zram.rst:35:WARNING
 Documentation/admin-guide/blockdev/zram.rst-36-=======
 --
 Documentation/admin-guide/bug-hunting.rst=4=Kernel bug reports often come with a stack dump like the one below::
 --
 Documentation/admin-guide/bug-hunting.rst-6-	------------[ cut here ]------------
 Documentation/admin-guide/bug-hunting.rst:7:	WARNING: CPU: 1 PID: 28102 at kernel/module.c:1108 module_put+0x57/0x70
 Documentation/admin-guide/bug-hunting.rst-8-	Modules linked in: dvb_usb_gp8psk(-) dvb_usb dvb_core nvidia_drm(PO) nvidia_modeset(PO) snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore nvidia(PO) [last unloaded: rc_core]
 --
 Documentation/admin-guide/bug-hunting.rst=42=the issue, it may also contain the word **Oops**, as on this one::
 Documentation/admin-guide/bug-hunting.rst-43-
 Documentation/admin-guide/bug-hunting.rst:44:	BUG: unable to handle kernel NULL pointer dereference at   (null)
 Documentation/admin-guide/bug-hunting.rst-45-	IP: [<c06969d4>] iret_exc+0x7d0/0xa59
 --
 Documentation/admin-guide/bug-hunting.rst=52=we'll refer to "Oops" for all kinds of stack traces that need to be analyzed.
 Documentation/admin-guide/bug-hunting.rst-53-
 Documentation/admin-guide/bug-hunting.rst:54:If the kernel is compiled with ``CONFIG_DEBUG_INFO``, you can enhance the
 Documentation/admin-guide/bug-hunting.rst-55-quality of the stack trace by using ``scripts/decode_stacktrace.sh``.
 --
 Documentation/admin-guide/bug-hunting.rst=112=number of the OOPS from the ``vmlinux`` file.
 Documentation/admin-guide/bug-hunting.rst-113-
 Documentation/admin-guide/bug-hunting.rst:114:The usage of gdb works best on a kernel compiled with ``CONFIG_DEBUG_INFO``.
 Documentation/admin-guide/bug-hunting.rst-115-This can be set by running::
 Documentation/admin-guide/bug-hunting.rst-116-
 Documentation/admin-guide/bug-hunting.rst:117:  $ ./scripts/config -d COMPILE_TEST -e DEBUG_KERNEL -e DEBUG_INFO
 Documentation/admin-guide/bug-hunting.rst-118-
 Documentation/admin-guide/bug-hunting.rst:119:On a kernel compiled with ``CONFIG_DEBUG_INFO``, you can simply copy the
 Documentation/admin-guide/bug-hunting.rst-120-EIP value from the OOPS::
 --
 Documentation/admin-guide/bug-hunting.rst=124=And use GDB to translate that to human-readable form::
 --
 Documentation/admin-guide/bug-hunting.rst-128-
 Documentation/admin-guide/bug-hunting.rst:129:If you don't have ``CONFIG_DEBUG_INFO`` enabled, you use the function
 Documentation/admin-guide/bug-hunting.rst-130-offset from the OOPS::
 --
 Documentation/admin-guide/bug-hunting.rst-133-
 Documentation/admin-guide/bug-hunting.rst:134:And recompile the kernel with ``CONFIG_DEBUG_INFO`` enabled::
 Documentation/admin-guide/bug-hunting.rst-135-
 Documentation/admin-guide/bug-hunting.rst:136:  $ ./scripts/config -d COMPILE_TEST -e DEBUG_KERNEL -e DEBUG_INFO
 Documentation/admin-guide/bug-hunting.rst-137-  $ make vmlinux
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst=81=Various user visible config options
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-86-
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:87:  CONFIG_BFQ_CGROUP_DEBUG
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-88-	  Debug help. Right now some additional stats file show up in cgroup
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst=97=Proportional weight policy files
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-203-  blkio.avg_queue_size
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:204:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-205-	  The average queue size for this cgroup over the entire time of this
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-209-  blkio.group_wait_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:210:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-211-	  This is the amount of time the cgroup had to wait since it became busy
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-220-  blkio.empty_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:221:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-222-	  This is the amount of time a cgroup spends without any pending
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-229-  blkio.idle_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:230:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-231-	  This is the amount of time spent by the IO scheduler idling for a
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-238-  blkio.dequeue
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:239:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y. This
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-240-	  gives the statistics about how many a times a group was dequeued
 --
 Documentation/admin-guide/cgroup-v1/memory.rst=545=memory.stat file includes following statistics:
 --
 Documentation/admin-guide/cgroup-v1/memory.rst-590-
 Documentation/admin-guide/cgroup-v1/memory.rst:591:  * additional vm parameters (depends on CONFIG_DEBUG_VM):
 Documentation/admin-guide/cgroup-v1/memory.rst-592-
 --
 Documentation/admin-guide/cgroup-v2.rst=1107=be exceeded by a CPU.
 Documentation/admin-guide/cgroup-v2.rst-1108-
 Documentation/admin-guide/cgroup-v2.rst:1109:WARNING: cgroup2 cpu controller doesn't yet support the (bandwidth) control of
 Documentation/admin-guide/cgroup-v2.rst-1110-realtime processes. For a kernel built with the CONFIG_RT_GROUP_SCHED option
 --
 Documentation/admin-guide/cifs/usage.rst=749=cifsFYI			If set to non-zero value, additional debug information
 --
 Documentation/admin-guide/cifs/usage.rst-754-			Some debugging statements are not compiled into the
 Documentation/admin-guide/cifs/usage.rst:755:			cifs kernel unless CONFIG_CIFS_DEBUG2 is enabled in the
 Documentation/admin-guide/cifs/usage.rst-756-			kernel configuration. cifsFYI may be set to one or
 --
 Documentation/admin-guide/clearing-warn-once.rst:1:Clearing WARN_ONCE
 Documentation/admin-guide/clearing-warn-once.rst-2-------------------
 Documentation/admin-guide/clearing-warn-once.rst-3-
 Documentation/admin-guide/clearing-warn-once.rst:4:WARN_ONCE / WARN_ON_ONCE / printk_once only emit a message once.
 Documentation/admin-guide/clearing-warn-once.rst-5-
 --
 Documentation/admin-guide/device-mapper/dm-crypt.rst=101=allow_discards
 --
 Documentation/admin-guide/device-mapper/dm-crypt.rst-104-
 Documentation/admin-guide/device-mapper/dm-crypt.rst:105:    WARNING: Assess the specific security risks carefully before enabling this
 Documentation/admin-guide/device-mapper/dm-crypt.rst-106-    option.  For example, allowing discards on encrypted devices may lead to
 --
 Documentation/admin-guide/dynamic-debug-howto.rst=293=The ``dyndbg`` option is a "fake" module parameter, which means:
 --
 Documentation/admin-guide/dynamic-debug-howto.rst-299-
 Documentation/admin-guide/dynamic-debug-howto.rst:300:For ``CONFIG_DYNAMIC_DEBUG`` kernels, any settings given at boot-time (or
 Documentation/admin-guide/dynamic-debug-howto.rst:301:enabled by ``-DDEBUG`` flag during compilation) can be disabled later via
 Documentation/admin-guide/dynamic-debug-howto.rst-302-the debugfs interface if the debug messages are no longer needed::
 --
 Documentation/admin-guide/dynamic-debug-howto.rst=353=Dynamic Debug is enabled via kernel config items::
 Documentation/admin-guide/dynamic-debug-howto.rst-354-
 Documentation/admin-guide/dynamic-debug-howto.rst:355:  CONFIG_DYNAMIC_DEBUG=y	# build catalog, enables CORE
 Documentation/admin-guide/dynamic-debug-howto.rst:356:  CONFIG_DYNAMIC_DEBUG_CORE=y	# enable mechanics only, skip catalog
 Documentation/admin-guide/dynamic-debug-howto.rst-357-
 Documentation/admin-guide/dynamic-debug-howto.rst=358=If you do not want to enable dynamic debug globally (i.e. in some embedded
 Documentation/admin-guide/dynamic-debug-howto.rst:359:system), you may set ``CONFIG_DYNAMIC_DEBUG_CORE`` as basic support of dynamic
 Documentation/admin-guide/dynamic-debug-howto.rst:360:debug and add ``ccflags := -DDYNAMIC_DEBUG_MODULE`` into the Makefile of any
 Documentation/admin-guide/dynamic-debug-howto.rst-361-modules which you'd like to dynamically debug later.
 --
 Documentation/admin-guide/dynamic-debug-howto.rst=368=debug is enabled::
 --
 Documentation/admin-guide/dynamic-debug-howto.rst-374-
 Documentation/admin-guide/dynamic-debug-howto.rst:375:Otherwise, they are off by default; ``ccflags += -DDEBUG`` or
 Documentation/admin-guide/dynamic-debug-howto.rst:376:``#define DEBUG`` in a source file will enable them appropriately.
 Documentation/admin-guide/dynamic-debug-howto.rst-377-
 Documentation/admin-guide/dynamic-debug-howto.rst:378:If ``CONFIG_DYNAMIC_DEBUG`` is not set, ``print_hex_dump_debug()`` is
 Documentation/admin-guide/dynamic-debug-howto.rst:379:just a shortcut for ``print_hex_dump(KERN_DEBUG)``.
 Documentation/admin-guide/dynamic-debug-howto.rst-380-
 --
 Documentation/admin-guide/hw-vuln/rsb.rst=50=there are unbalanced CALLs/RETs after a context switch or VMEXIT.
 --
 Documentation/admin-guide/hw-vuln/rsb.rst-73-	always be done in addition to IBPB [#amd-ibpb-no-rsb]_.  This is
 Documentation/admin-guide/hw-vuln/rsb.rst:74:	indicated by X86_BUG_IBPB_NO_RET.
 Documentation/admin-guide/hw-vuln/rsb.rst-75-
 --
 Documentation/admin-guide/hw-vuln/tsx_async_abort.rst=178=The valid options are:
 --
 Documentation/admin-guide/hw-vuln/tsx_async_abort.rst-195-
 Documentation/admin-guide/hw-vuln/tsx_async_abort.rst:196:  auto		Disables TSX if X86_BUG_TAA is present, otherwise enables TSX
 Documentation/admin-guide/hw-vuln/tsx_async_abort.rst-197-                on the system.
 --
 Documentation/admin-guide/kdump/kdump.rst=127=System kernel config options
 --
 Documentation/admin-guide/kdump/kdump.rst-152-
 Documentation/admin-guide/kdump/kdump.rst:153:	CONFIG_DEBUG_INFO=Y
 Documentation/admin-guide/kdump/kdump.rst-154-
 --
 Documentation/admin-guide/kdump/kdump.rst=552=Crash document can be found at:
 --
 Documentation/admin-guide/kdump/kdump.rst-554-
 Documentation/admin-guide/kdump/kdump.rst:555:Trigger Kdump on WARN()
 Documentation/admin-guide/kdump/kdump.rst-556-=======================
 Documentation/admin-guide/kdump/kdump.rst-557-
 Documentation/admin-guide/kdump/kdump.rst:558:The kernel parameter, panic_on_warn, calls panic() in all WARN() paths.  This
 Documentation/admin-guide/kdump/kdump.rst-559-will cause a kdump to occur at the panic() call.  In cases where a user wants
 --
 Documentation/admin-guide/kernel-parameters.txt-12-	DRM	Direct Rendering Management support is enabled.
 Documentation/admin-guide/kernel-parameters.txt:13:	DYNAMIC_DEBUG Build in debug messages and enable them at runtime
 Documentation/admin-guide/kernel-parameters.txt-14-	EARLY	Parameter processed too early to be embedded in initrd.
 --
 Documentation/admin-guide/kernel-parameters.txt=91=In addition, the following text indicates that the option
 --
 Documentation/admin-guide/kernel-parameters.txt-93-	BOOT	Is a boot loader parameter.
 Documentation/admin-guide/kernel-parameters.txt:94:	BUGS=	Relates to possible processor bugs on the said processor.
 Documentation/admin-guide/kernel-parameters.txt-95-	KNL	Is a kernel start-up parameter.
 --
 Documentation/admin-guide/kernel-parameters.txt=98=Kernel parameters
 --
 Documentation/admin-guide/kernel-parameters.txt-166-
 Documentation/admin-guide/kernel-parameters.txt:167:	acpi.debug_layer=	[HW,ACPI,ACPI_DEBUG]
 Documentation/admin-guide/kernel-parameters.txt:168:	acpi.debug_level=	[HW,ACPI,ACPI_DEBUG]
 Documentation/admin-guide/kernel-parameters.txt-169-			Format: <int>
 Documentation/admin-guide/kernel-parameters.txt:170:			CONFIG_ACPI_DEBUG must be enabled to produce any ACPI
 Documentation/admin-guide/kernel-parameters.txt-171-			debug output.  Bits in debug_layer correspond to a
 --
 Documentation/admin-guide/kernel-parameters.txt-174-			Bits in debug_level correspond to a level in
 Documentation/admin-guide/kernel-parameters.txt:175:			ACPI_DEBUG_PRINT statements, e.g.,
 Documentation/admin-guide/kernel-parameters.txt:176:			    ACPI_DEBUG_PRINT((ACPI_DB_INFO, ...
 Documentation/admin-guide/kernel-parameters.txt-177-			The debug_level mask defaults to "info".  See
 --
 Documentation/admin-guide/kernel-parameters.txt-685-
 Documentation/admin-guide/kernel-parameters.txt:686:	cachesize=	[BUGS=X86-32] Override level 2 CPU cache size detection.
 Documentation/admin-guide/kernel-parameters.txt-687-			Sometimes CPU hardware bugs make them report the cache
 --
 Documentation/admin-guide/kernel-parameters.txt-778-			Format: { "0" | "1" }
 Documentation/admin-guide/kernel-parameters.txt:779:			Default: 0 (1 if CONFIG_DEBUG_VM is set)
 Documentation/admin-guide/kernel-parameters.txt-780-
 --
 Documentation/admin-guide/kernel-parameters.txt-824-
 Documentation/admin-guide/kernel-parameters.txt:825:	clock=		[BUGS=X86-32, HW] gettimeofday clocksource override.
 Documentation/admin-guide/kernel-parameters.txt-826-			[Deprecated]
 --
 Documentation/admin-guide/kernel-parameters.txt-1161-			the hang situation.  The default value of this
 Documentation/admin-guide/kernel-parameters.txt:1162:			option depends on the CSD_LOCK_WAIT_DEBUG_DEFAULT
 Documentation/admin-guide/kernel-parameters.txt-1163-			Kconfig option.
 --
 Documentation/admin-guide/kernel-parameters.txt-1195-	debug_guardpage_minorder=
 Documentation/admin-guide/kernel-parameters.txt:1196:			[KNL,EARLY] When CONFIG_DEBUG_PAGEALLOC is set, this
 Documentation/admin-guide/kernel-parameters.txt-1197-			parameter allows control of the order of pages that will
 --
 Documentation/admin-guide/kernel-parameters.txt-1210-			CPU MMU is bypassed) which are not detectable by
 Documentation/admin-guide/kernel-parameters.txt:1211:			CONFIG_DEBUG_PAGEALLOC, hence this option will not
 Documentation/admin-guide/kernel-parameters.txt-1212-			help tracking down these problems.
 --
 Documentation/admin-guide/kernel-parameters.txt-1214-	debug_pagealloc=
 Documentation/admin-guide/kernel-parameters.txt:1215:			[KNL,EARLY] When CONFIG_DEBUG_PAGEALLOC is set, this parameter
 Documentation/admin-guide/kernel-parameters.txt-1216-			enables the feature at boot time. By default, it is
 Documentation/admin-guide/kernel-parameters.txt-1217-			disabled and the system will work mostly the same as a
 Documentation/admin-guide/kernel-parameters.txt:1218:			kernel built without CONFIG_DEBUG_PAGEALLOC.
 Documentation/admin-guide/kernel-parameters.txt-1219-			Note: to get most of debug_pagealloc error reports, it's
 --
 Documentation/admin-guide/kernel-parameters.txt-1338-
 Documentation/admin-guide/kernel-parameters.txt:1339:	dma_debug=off	If the kernel is compiled with DMA_API_DEBUG support,
 Documentation/admin-guide/kernel-parameters.txt-1340-			this option disables the debugging code at boot.
 --
 Documentation/admin-guide/kernel-parameters.txt-1417-
 Documentation/admin-guide/kernel-parameters.txt:1418:	dyndbg[="val"]		[KNL,DYNAMIC_DEBUG]
 Documentation/admin-guide/kernel-parameters.txt-1419-	<module>.dyndbg[="val"]
 --
 Documentation/admin-guide/kernel-parameters.txt-2021-			mode before resuming the system (see
 Documentation/admin-guide/kernel-parameters.txt:2022:			/sys/power/pm_test). Only available when CONFIG_PM_DEBUG
 Documentation/admin-guide/kernel-parameters.txt-2023-			is set. Default value is 5.
 --
 Documentation/admin-guide/kernel-parameters.txt-2043-
 Documentation/admin-guide/kernel-parameters.txt:2044:	hlt		[BUGS=ARM,SH]
 Documentation/admin-guide/kernel-parameters.txt-2045-
 --
 Documentation/admin-guide/kernel-parameters.txt-2691-	iommu.debug_pagealloc=
 Documentation/admin-guide/kernel-parameters.txt:2692:			[KNL,EARLY] When CONFIG_IOMMU_DEBUG_PAGEALLOC is set, this
 Documentation/admin-guide/kernel-parameters.txt-2693-			parameter enables the feature at boot time. By default, it
 Documentation/admin-guide/kernel-parameters.txt-2694-			is disabled and the system behaves the same way as a kernel
 Documentation/admin-guide/kernel-parameters.txt:2695:			built without CONFIG_IOMMU_DEBUG_PAGEALLOC.
 Documentation/admin-guide/kernel-parameters.txt-2696-			Format: { "0" | "1" }
 --
 Documentation/admin-guide/kernel-parameters.txt-3047-			Default: on
 Documentation/admin-guide/kernel-parameters.txt:3048:			Built with CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF=y,
 Documentation/admin-guide/kernel-parameters.txt-3049-			the default is off.
 --
 Documentation/admin-guide/kernel-parameters.txt-3145-			[KVM] Controls the software workaround for the
 Documentation/admin-guide/kernel-parameters.txt:3146:			X86_BUG_ITLB_MULTIHIT bug.
 Documentation/admin-guide/kernel-parameters.txt-3147-			force	: Always deploy workaround.
 --
 Documentation/admin-guide/kernel-parameters.txt-3149-			auto    : Deploy workaround based on the presence of
 Documentation/admin-guide/kernel-parameters.txt:3150:				  X86_BUG_ITLB_MULTIHIT.
 Documentation/admin-guide/kernel-parameters.txt-3151-
 --
 Documentation/admin-guide/kernel-parameters.txt-3684-			3 (KERN_ERR)		error conditions
 Documentation/admin-guide/kernel-parameters.txt:3685:			4 (KERN_WARNING)	warning conditions
 Documentation/admin-guide/kernel-parameters.txt-3686-			5 (KERN_NOTICE)		normal but significant condition
 Documentation/admin-guide/kernel-parameters.txt-3687-			6 (KERN_INFO)		informational
 Documentation/admin-guide/kernel-parameters.txt:3688:			7 (KERN_DEBUG)		debug-level messages
 Documentation/admin-guide/kernel-parameters.txt-3689-
 --
 Documentation/admin-guide/kernel-parameters.txt-3908-
 Documentation/admin-guide/kernel-parameters.txt:3909:	mem=nopentium	[BUGS=X86-32] Disable usage of 4MB pages for kernel
 Documentation/admin-guide/kernel-parameters.txt-3910-			memory.
 --
 Documentation/admin-guide/kernel-parameters.txt-4146-	mminit_loglevel=
 Documentation/admin-guide/kernel-parameters.txt:4147:			[KNL,EARLY] When CONFIG_DEBUG_MEMORY_INIT is set, this
 Documentation/admin-guide/kernel-parameters.txt-4148-			parameter allows control of the logging verbosity for
 --
 Documentation/admin-guide/kernel-parameters.txt-4150-			of 0 disables mminit logging and a level of 4 will
 Documentation/admin-guide/kernel-parameters.txt:4151:			log everything. Information is printed at KERN_DEBUG
 Documentation/admin-guide/kernel-parameters.txt-4152-			so loglevel=8 may also need to be specified.
 --
 Documentation/admin-guide/kernel-parameters.txt-4204-	module.enable_dups_trace
 Documentation/admin-guide/kernel-parameters.txt:4205:			[KNL] When CONFIG_MODULE_DEBUG_AUTOLOAD_DUPS is set,
 Documentation/admin-guide/kernel-parameters.txt-4206-			this means that duplicate request_module() calls will
 Documentation/admin-guide/kernel-parameters.txt:4207:			trigger a WARN_ON() instead of a pr_warn(). Note that
 Documentation/admin-guide/kernel-parameters.txt:4208:			if MODULE_DEBUG_AUTOLOAD_DUPS_TRACE is set, WARN_ON()s
 Documentation/admin-guide/kernel-parameters.txt-4209-			will always be issued and this option does nothing.
 --
 Documentation/admin-guide/kernel-parameters.txt-4439-
 Documentation/admin-guide/kernel-parameters.txt:4440:	nmi_watchdog=	[KNL,BUGS=X86] Debugging features for SMP kernels
 Documentation/admin-guide/kernel-parameters.txt-4441-			Format: [panic,][nopanic,][rNNN,][num]
 --
 Documentation/admin-guide/kernel-parameters.txt-4457-
 Documentation/admin-guide/kernel-parameters.txt:4458:	no387		[BUGS=X86-32] Tells the kernel to use the 387 maths
 Documentation/admin-guide/kernel-parameters.txt-4459-			emulation library even if a 387 maths coprocessor
 --
 Documentation/admin-guide/kernel-parameters.txt-4517-
 Documentation/admin-guide/kernel-parameters.txt:4518:	nofxsr		[BUGS=X86-32] Disables x86 floating point extended
 Documentation/admin-guide/kernel-parameters.txt-4519-			register save and restore. The kernel will only save
 --
 Documentation/admin-guide/kernel-parameters.txt-4727-
 Documentation/admin-guide/kernel-parameters.txt:4728:	noxsave		[BUGS=X86] Disables x86 extended register state save
 Documentation/admin-guide/kernel-parameters.txt-4729-			and restore using xsave. The kernel will fallback to
 --
 Documentation/admin-guide/kernel-parameters.txt-4881-
 Documentation/admin-guide/kernel-parameters.txt:4882:	panic_on_warn=1	panic() instead of WARN().  Useful to cause kdump
 Documentation/admin-guide/kernel-parameters.txt:4883:			on a WARN().
 Documentation/admin-guide/kernel-parameters.txt-4884-
 --
 Documentation/admin-guide/kernel-parameters.txt-5331-		force	Enable ASPM even on devices that claim not to support it.
 Documentation/admin-guide/kernel-parameters.txt:5332:			WARNING: Forcing ASPM on may cause system lockups.
 Documentation/admin-guide/kernel-parameters.txt-5333-
 --
 Documentation/admin-guide/kernel-parameters.txt-5409-			Enable PNP debug messages (depends on the
 Documentation/admin-guide/kernel-parameters.txt:5410:			CONFIG_PNP_DEBUG_MESSAGES option).  Change at run-time
 Documentation/admin-guide/kernel-parameters.txt-5411-			via /sys/module/pnp/parameters/debug.  We always show
 --
 Documentation/admin-guide/kernel-parameters.txt-5837-			This wake_up() will be accompanied by a
 Documentation/admin-guide/kernel-parameters.txt:5838:			WARN_ONCE() splat and an ftrace_dump().
 Documentation/admin-guide/kernel-parameters.txt-5839-
 --
 Documentation/admin-guide/kernel-parameters.txt-6588-
 Documentation/admin-guide/kernel-parameters.txt:6589:	reserve=	[KNL,BUGS] Force kernel to ignore I/O ports or memory
 Documentation/admin-guide/kernel-parameters.txt-6590-			Format: <base1>,<size1>[,<base2>,<size2>,...]
 --
 Documentation/admin-guide/kernel-parameters.txt-6766-	rseq_debug=	[KNL] Enable or disable restartable sequence
 Documentation/admin-guide/kernel-parameters.txt:6767:			debug mode. Defaults to CONFIG_RSEQ_DEBUG_DEFAULT_ENABLE.
 Documentation/admin-guide/kernel-parameters.txt-6768-			Format: <bool>
 --
 Documentation/admin-guide/kernel-parameters.txt-6946-
]
]

gemini-3-flash-preview

							input: 16709
							output: 19
							thoughts: 27
						

Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person:

**Refining My Search for TDLS Information**

Ugh, that `grep` output is just a mess. It's way too noisy and returning way too many irrelevant results. I need to zero in on the relevant code, specifically the TDLS implementation within the mac80211 framework. Therefore, instead of a broad search across the entire codebase, I need to limit the scope. Let's restrict the search path directly to `net/mac80211/tdls.c`. This focused approach will undoubtedly yield a more manageable and useful set of results, allowing me to quickly understand this specific section. This targeted strategy will save me significant time and cognitive overhead.

map[Expression:WARN|BUG|panic]

map[Output:
Full output is too long, showing 500 out of 547899 lines.
Use more precise expression if possible.

[CREDITS=1536=E: dth@cistron.nl
 CREDITS:1537:D: /proc/cpuinfo, reboot on panic , kernel pre-patch tester ;)
 CREDITS-1538-S: Cistron
 --
 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump=32=Description:	read only
 --
 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump-34-		loaded into memory. It shows 1 if a crash kernel has been
 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump:35:		successfully loaded for panic handling, or 0 if no crash
 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump-36-		kernel is present.
 --
 Documentation/ABI/removed/sysfs-mce=4=Description:
 --
 Documentation/ABI/removed/sysfs-mce-26-		==  ===========================================================
 Documentation/ABI/removed/sysfs-mce:27:		 0  always panic on uncorrected errors, log corrected errors
 Documentation/ABI/removed/sysfs-mce:28:		 1  panic or SIGBUS on uncorrected errors, log corrected errors
 Documentation/ABI/removed/sysfs-mce-29-		 2  SIGBUS or log uncorrected errors, log corrected errors
 Documentation/ABI/removed/sysfs-mce:30:		 3  never panic or SIGBUS, log all errors (for testing only)
 Documentation/ABI/removed/sysfs-mce-31-		==  ===========================================================
 --
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage=4=Description:
 --
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage-12-				are 2..4. Available only if
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage:13:				CONFIG_USB_GADGET_DEBUG_FILES is set.
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage-14-		===========	==============================================
 --
 Documentation/ABI/testing/debugfs-cros-ec=4=Description:
 --
 Documentation/ABI/testing/debugfs-cros-ec-9-
 Documentation/ABI/testing/debugfs-cros-ec:10:What:		/sys/kernel/debug/<cros-ec-device>/panicinfo
 Documentation/ABI/testing/debugfs-cros-ec-11-Date:		September 2017
 --
 Documentation/ABI/testing/debugfs-cros-ec=13=Description:
 Documentation/ABI/testing/debugfs-cros-ec:14:		This file dumps the EC panic information from the previous
 Documentation/ABI/testing/debugfs-cros-ec-15-		reboot. This file will only exist if the PANIC_INFO command
 --
 Documentation/ABI/testing/ima_policy=4=Description:
 --
 Documentation/ABI/testing/ima_policy-87-			dont_appraise fsmagic=0x62656572
 Documentation/ABI/testing/ima_policy:88:			# DEBUGFS_MAGIC
 Documentation/ABI/testing/ima_policy-89-			dont_measure fsmagic=0x64626720
 --
 Documentation/ABI/testing/pstore=6=Description:	Generic interface to platform dependent persistent storage.
 --
 Documentation/ABI/testing/pstore-10-		provide a generic interface to show records captured in
 Documentation/ABI/testing/pstore:11:		the dying moments.  In the case of a panic the last part
 Documentation/ABI/testing/pstore-12-		of the console log is captured, but other interesting
 --
 Documentation/ABI/testing/pstore-38-		The 'kmsg_bytes' mount option changes the target amount of
 Documentation/ABI/testing/pstore:39:		data saved on each oops/panic. Pstore saves (possibly
 Documentation/ABI/testing/pstore-40-		multiple) files based on the record size of the underlying
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic=1=What:		/sys/devices/pci0000:00/*/QEMU0001:00/capability for MMIO
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:2:		/sys/bus/pci/drivers/pvpanic-pci/0000:00:0*.0/capability for PCI
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-3-Date:		Jan 2021
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic=5=Description:
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:6:		Read-only attribute. Capabilities of pvpanic device which
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-7-		are supported by QEMU.
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-11-		Detailed bit definition refers to section <Bit Definition>
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:12:		from pvpanic device specification:
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:13:		https://git.qemu.org/?p=qemu.git;a=blob_plain;f=docs/specs/pvpanic.txt
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-14-
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic=15=What:		/sys/devices/pci0000:00/*/QEMU0001:00/events
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:16:		/sys/bus/pci/drivers/pvpanic-pci/0000:00:0*.0/events for PCI
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-17-Date:		Jan 2021
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic=19=Description:
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-20-		RW attribute. Set/get which features in-use. This attribute
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:21:		is used to enable/disable feature(s) of pvpanic device.
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-22-		Notice that this value should be a subset of capability.
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-25-
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:26:		Also refer to pvpanic device specification.
 --
 Documentation/ABI/testing/sysfs-class-thermal=101=Description:
 --
 Documentation/ABI/testing/sysfs-class-thermal-113-
 Documentation/ABI/testing/sysfs-class-thermal:114:		WARNING:
 Documentation/ABI/testing/sysfs-class-thermal-115-		    Be careful while enabling this option on production systems,
 --
 Documentation/ABI/testing/sysfs-devices-edac=34=Description:	This attribute file displays the total count of uncorrectable
 Documentation/ABI/testing/sysfs-devices-edac-35-		errors that have occurred on this memory controller. If
 Documentation/ABI/testing/sysfs-devices-edac:36:		panic_on_ue is set, this counter will not have a chance to
 Documentation/ABI/testing/sysfs-devices-edac:37:		increment, since EDAC will panic the system
 Documentation/ABI/testing/sysfs-devices-edac-38-
 --
 Documentation/ABI/testing/sysfs-devices-edac=116=Description:	This control file allows this DIMM to have a label assigned
 --
 Documentation/ABI/testing/sysfs-devices-edac-118-		the output can provide the DIMM label in the system log.
 Documentation/ABI/testing/sysfs-devices-edac:119:		This becomes vital for panic events to isolate the
 Documentation/ABI/testing/sysfs-devices-edac-120-		cause of the UE event.
 --
 Documentation/ABI/testing/sysfs-devices-edac=154=Description:	This attribute file displays the total count of uncorrectable
 Documentation/ABI/testing/sysfs-devices-edac:155:		errors that have occurred on this DIMM. If panic_on_ue is set, this
 Documentation/ABI/testing/sysfs-devices-edac:156:		counter will not have a chance to increment, since EDAC will panic the
 Documentation/ABI/testing/sysfs-devices-edac-157-		system
 --
 Documentation/ABI/testing/sysfs-driver-st=5=Description:
 --
 Documentation/ABI/testing/sysfs-driver-st-8-		Note that debug output requires that the module be compiled
 Documentation/ABI/testing/sysfs-driver-st:9:		with the #define DEBUG set to a non-zero value (this is the
 Documentation/ABI/testing/sysfs-driver-st:10:		default). If DEBUG is set to 0 then this file will not
 Documentation/ABI/testing/sysfs-driver-st-11-		appear in sysfs as its presence is conditional upon debug
 --
 Documentation/ABI/testing/sysfs-kernel-kexec-kdump=22=Description:	read only
 --
 Documentation/ABI/testing/sysfs-kernel-kexec-kdump-24-		loaded into memory. It shows 1 if a crash kernel has been
 Documentation/ABI/testing/sysfs-kernel-kexec-kdump:25:		successfully loaded for panic handling, or 0 if no crash
 Documentation/ABI/testing/sysfs-kernel-kexec-kdump-26-		kernel is present.
 --
 Documentation/ABI/testing/sysfs-mce=4=Description:
 --
 Documentation/ABI/testing/sysfs-mce-8-		detected by the CPU. Uncorrected errors typically cause a
 Documentation/ABI/testing/sysfs-mce:9:		machine check (often with panic), corrected ones cause a
 Documentation/ABI/testing/sysfs-mce-10-		machine check log entry.
 --
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl=83=Description:
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl-84-		The file used to write BlueField boot log with the format
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl:85:                "[INFO|WARN|ERR|ASSERT ]<msg>". Log level 'INFO' is used by
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl-86-                default if not specified.
 --
 Documentation/Kconfig=3=menu "Documentation"
 Documentation/Kconfig-4-
 Documentation/Kconfig:5:config WARN_MISSING_DOCUMENTS
 Documentation/Kconfig-6-	bool "Warn if there's a missing documentation file"
 --
 Documentation/Kconfig-14-
 Documentation/Kconfig:15:config WARN_ABI_ERRORS
 Documentation/Kconfig-16-	bool "Warn if there are errors at ABI files"
 --
 Documentation/Makefile=8=ifneq ($(MAKECMDGOALS),cleandocs)
 Documentation/Makefile-9-# Check for broken documentation file references
 Documentation/Makefile:10:ifeq ($(CONFIG_WARN_MISSING_DOCUMENTS),y)
 Documentation/Makefile-11-$(shell $(srctree)/tools/docs/documentation-file-ref-check --warn)
 Documentation/Makefile=12=endif
 --
 Documentation/Makefile-14-# Check for broken ABI files
 Documentation/Makefile:15:ifeq ($(CONFIG_WARN_ABI_ERRORS),y)
 Documentation/Makefile-16-$(shell $(srctree)/tools/docs/get_abi.py --dir $(srctree)/Documentation/ABI validate)
 --
 Documentation/PCI/pci-error-recovery.rst=306=device initialization routines, and an unusual config space setup
 Documentation/PCI/pci-error-recovery.rst:307:may result in hung devices, kernel panics, or silent data corruption.
 Documentation/PCI/pci-error-recovery.rst-308-
 --
 Documentation/PCI/pci.rst=200=the PCI device by calling pci_enable_device(). This will:
 --
 Documentation/PCI/pci.rst-209-.. warning::
 Documentation/PCI/pci.rst:210:   OS BUG: we don't check resource allocations before enabling those
 Documentation/PCI/pci.rst-211-   resources. The sequence would make more sense if we called
 --
 Documentation/PCI/pci.rst=250=The idea is to prevent two devices colliding on the same address range.
 --
 Documentation/PCI/pci.rst-252-.. tip::
 Documentation/PCI/pci.rst:253:   See OS BUG comment above. Currently (2.6.19), The driver can only
 Documentation/PCI/pci.rst-254-   determine MMIO and IO Port resource availability _after_ calling
 --
 Documentation/PCI/pci.rst=432=driver isn't losing resources from that other subsystem.
 Documentation/PCI/pci.rst:433:If this happens, typically the symptom is an Oops (panic) when
 Documentation/PCI/pci.rst-434-the subsystem attempts to call into a driver that has been unloaded.
 --
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=78=lock-acquisition and lock-release functions::
 --
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-104-   25
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:105:   26 WARN_ON(r1 == 0 && r2 == 0 && r3 == 0);
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-106-
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:107:The ``WARN_ON()`` is evaluated at "the end of time",
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-108-after all changes have propagated throughout the system.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=109=Without the ``smp_mb__after_unlock_lock()`` provided by the
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:110:acquisition functions, this ``WARN_ON()`` could trigger, for example
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-111-on PowerPC.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=112=The ``smp_mb__after_unlock_lock()`` invocations prevent this
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:113:``WARN_ON()`` from triggering.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-114-
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=203=non-\ ``NULL``, locklessly accessing the ``->a`` and ``->b`` fields.
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-218-      12   p->b = a;
 Documentation/RCU/Design/Requirements/Requirements.rst:219:      13   gp = p; /* ORDERING BUG */
 Documentation/RCU/Design/Requirements/Requirements.rst-220-      14   spin_unlock(&gp_lock);
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=225=their rights to reorder this code as follows:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-238-      10   }
 Documentation/RCU/Design/Requirements/Requirements.rst:239:      11   gp = p; /* ORDERING BUG */
 Documentation/RCU/Design/Requirements/Requirements.rst-240-      12   p->a = a;
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=755=example illustrates this:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-765-       7     r2 = READ_ONCE(x);
 Documentation/RCU/Design/Requirements/Requirements.rst:766:       8     WARN_ON(!r2); /* BUG!!! */
 Documentation/RCU/Design/Requirements/Requirements.rst-767-       9   }
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=779=If the thread0() function's rcu_read_lock() excluded the
 Documentation/RCU/Design/Requirements/Requirements.rst:780:thread1() function's update, the WARN_ON() could never fire. But
 Documentation/RCU/Design/Requirements/Requirements.rst-781-the fact is that rcu_read_lock() does not exclude much of anything
 Documentation/RCU/Design/Requirements/Requirements.rst=782=aside from subsequent grace periods, of which thread1() has none, so
 Documentation/RCU/Design/Requirements/Requirements.rst:783:the WARN_ON() can and does fire.
 Documentation/RCU/Design/Requirements/Requirements.rst-784-
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=1585=against mishaps and misuse:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-1615-   needed `patch series <https://lwn.net/Articles/376011/>`__.
 Documentation/RCU/Design/Requirements/Requirements.rst:1616:#. Kernels built with ``CONFIG_DEBUG_OBJECTS_RCU_HEAD=y`` will splat if
 Documentation/RCU/Design/Requirements/Requirements.rst-1617-   a data element is passed to call_rcu() twice in a row, without a
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-1641-   stall warnings are counter-productive during sysrq dumps and during
 Documentation/RCU/Design/Requirements/Requirements.rst:1642:   panics. RCU therefore supplies the rcu_sysrq_start() and
 Documentation/RCU/Design/Requirements/Requirements.rst-1643-   rcu_sysrq_end() API members to be called before and after long
 Documentation/RCU/Design/Requirements/Requirements.rst:1644:   sysrq dumps. RCU also supplies the rcu_panic() notifier that is
 Documentation/RCU/Design/Requirements/Requirements.rst:1645:   automatically invoked at the beginning of a panic to suppress further
 Documentation/RCU/Design/Requirements/Requirements.rst-1646-   RCU CPU stall warnings.
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=2156=the following:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-2161-       2 p = rcu_dereference(gp);
 Documentation/RCU/Design/Requirements/Requirements.rst:2162:       3 get_user(user_v, user_p); // BUG: POSSIBLE PAGE FAULT!!!
 Documentation/RCU/Design/Requirements/Requirements.rst-2163-       4 v = p->value;
 --
 Documentation/RCU/checklist.rst=12=over a rather long period of time, but improvements are always welcome!
 --
 Documentation/RCU/checklist.rst-488-
 Documentation/RCU/checklist.rst:489:16.	Use CONFIG_PROVE_LOCKING, CONFIG_DEBUG_OBJECTS_RCU_HEAD, and the
 Documentation/RCU/checklist.rst-490-	__rcu sparse checks to validate your RCU code.	These can help
 --
 Documentation/RCU/checklist.rst-498-
 Documentation/RCU/checklist.rst:499:	CONFIG_DEBUG_OBJECTS_RCU_HEAD:
 Documentation/RCU/checklist.rst-500-		check that you don't pass the same object to call_rcu()
 --
 Documentation/RCU/lockdep-splat.rst=21=has long since been fixed::
 --
 Documentation/RCU/lockdep-splat.rst-23-    =============================
 Documentation/RCU/lockdep-splat.rst:24:    WARNING: suspicious RCU usage
 Documentation/RCU/lockdep-splat.rst-25-    -----------------------------
 --
 Documentation/RCU/lockdep.rst=24=These functions are conservative, and will therefore return 1 if they
 Documentation/RCU/lockdep.rst:25:aren't certain (for example, if CONFIG_DEBUG_LOCK_ALLOC is not set).
 Documentation/RCU/lockdep.rst:26:This prevents things like WARN_ON(!rcu_read_lock_held()) from giving false
 Documentation/RCU/lockdep.rst-27-positives when lockdep is disabled.
 --
 Documentation/RCU/rcu_dereference.rst=25=readers working properly:
 --
 Documentation/RCU/rcu_dereference.rst-98-		q += p > &oom_p;
 Documentation/RCU/rcu_dereference.rst:99:		r1 = *q;  /* BUGGY!!! */
 Documentation/RCU/rcu_dereference.rst-100-
 --
 Documentation/RCU/rcu_dereference.rst-188-		of such an RCU usage bug is shown in the section titled
 Documentation/RCU/rcu_dereference.rst:189:		"EXAMPLE OF AMPLIFIED RCU-USAGE BUG".
 Documentation/RCU/rcu_dereference.rst-190-
 --
 Documentation/RCU/rcu_dereference.rst-218-
 Documentation/RCU/rcu_dereference.rst:219:EXAMPLE OF AMPLIFIED RCU-USAGE BUG
 Documentation/RCU/rcu_dereference.rst-220-----------------------------------
 --
 Documentation/RCU/rcubarrier.rst=194=The original code for rcu_barrier() was roughly as follows::
 --
 Documentation/RCU/rcubarrier.rst-197-  2  {
 Documentation/RCU/rcubarrier.rst:198:  3    BUG_ON(in_interrupt());
 Documentation/RCU/rcubarrier.rst-199-  4    /* Take cpucontrol mutex to protect against CPU hotplug */
 --
 Documentation/RCU/stallwarn.rst=18=warnings:
 --
 Documentation/RCU/stallwarn.rst-112-	ct_irq_enter() or ct_irq_exit(), respectively.  Building your
 Documentation/RCU/stallwarn.rst:113:	kernel with CONFIG_RCU_EQS_DEBUG=y can help track down these types
 Documentation/RCU/stallwarn.rst-114-	of issues, which sometimes arise in architecture-specific code.
 --
 Documentation/RCU/torture.rst=208=Sometimes additional debugging is useful, and in such cases the --kconfig
 Documentation/RCU/torture.rst:209:parameter to kvm.sh may be used, for example, ``--kconfig 'CONFIG_RCU_EQS_DEBUG=y'``.
 Documentation/RCU/torture.rst-210-In addition, there are the --gdb, --kasan, and --kcsan parameters.
 --
 Documentation/RCU/whatisRCU.rst=278=rcu_dereference()
 --
 Documentation/RCU/whatisRCU.rst-324-		rcu_read_unlock();
 Documentation/RCU/whatisRCU.rst:325:		x = p->address;	/* BUG!!! */
 Documentation/RCU/whatisRCU.rst-326-		rcu_read_lock();
 Documentation/RCU/whatisRCU.rst:327:		y = p->data;	/* BUG!!! */
 Documentation/RCU/whatisRCU.rst-328-		rcu_read_unlock();
 --
 Documentation/RCU/whatisRCU.rst=1237=All: lockdep-checked RCU utility APIs::
 Documentation/RCU/whatisRCU.rst-1238-
 Documentation/RCU/whatisRCU.rst:1239:	RCU_LOCKDEP_WARN
 Documentation/RCU/whatisRCU.rst-1240-	rcu_sleep_check
 --
 Documentation/accel/qaic/aic100.rst=187=of the defined channels, and their uses.
 --
 Documentation/accel/qaic/aic100.rst-221-+----------------+---------+----------+----------------------------------------+
 Documentation/accel/qaic/aic100.rst:222:| QAIC_DEBUG     | 18 & 19 | AMSS     | Not used.                              |
 Documentation/accel/qaic/aic100.rst-223-+----------------+---------+----------+----------------------------------------+
 --
 Documentation/admin-guide/LSM/ipe.rst=622=boot_verified
 --
 Documentation/admin-guide/LSM/ipe.rst-630-
 Documentation/admin-guide/LSM/ipe.rst:631:   .. WARNING::
 Documentation/admin-guide/LSM/ipe.rst-632-
 --
 Documentation/admin-guide/RAS/main.rst=240=modules exhibiting CEs can reduce the likelihood of the dreaded UE events
 Documentation/admin-guide/RAS/main.rst:241:and system panics.
 Documentation/admin-guide/RAS/main.rst-242-
 --
 Documentation/admin-guide/RAS/main.rst=480=this ``X`` memory module:
 --
 Documentation/admin-guide/RAS/main.rst-489-	This attribute file displays the total count of uncorrectable
 Documentation/admin-guide/RAS/main.rst:490:	errors that have occurred on this DIMM. If panic_on_ue is set
 Documentation/admin-guide/RAS/main.rst-491-	this counter will not have a chance to increment, since EDAC
 Documentation/admin-guide/RAS/main.rst:492:	will panic the system.
 Documentation/admin-guide/RAS/main.rst-493-
 --
 Documentation/admin-guide/RAS/main.rst-523-	the output can provide the DIMM label in the system log.
 Documentation/admin-guide/RAS/main.rst:524:	This becomes vital for panic events to isolate the
 Documentation/admin-guide/RAS/main.rst-525-	cause of the UE event.
 --
 Documentation/admin-guide/RAS/main.rst=647=Module parameters
 --
 Documentation/admin-guide/RAS/main.rst-649-
 Documentation/admin-guide/RAS/main.rst:650:- ``edac_mc_panic_on_ue`` - Panic on UE control file
 Documentation/admin-guide/RAS/main.rst-651-
 Documentation/admin-guide/RAS/main.rst:652:	An uncorrectable error will cause a machine panic.  This is usually
 Documentation/admin-guide/RAS/main.rst-653-	desirable.  It is a bad idea to continue when an uncorrectable error
 --
 Documentation/admin-guide/RAS/main.rst-660-
 Documentation/admin-guide/RAS/main.rst:661:		module/kernel parameter: edac_mc_panic_on_ue=[0|1]
 Documentation/admin-guide/RAS/main.rst-662-
 --
 Documentation/admin-guide/RAS/main.rst-664-
 Documentation/admin-guide/RAS/main.rst:665:		echo "1" > /sys/module/edac_core/parameters/edac_mc_panic_on_ue
 Documentation/admin-guide/RAS/main.rst-666-
 --
 Documentation/admin-guide/RAS/main.rst-718-
 Documentation/admin-guide/RAS/main.rst:719:- ``panic_on_pci_parity`` - Panic on PCI PARITY Error
 Documentation/admin-guide/RAS/main.rst-720-
 Documentation/admin-guide/RAS/main.rst-721-
 Documentation/admin-guide/RAS/main.rst:722:	This control file enables or disables panicking when a parity
 Documentation/admin-guide/RAS/main.rst-723-	error has been detected.
 --
 Documentation/admin-guide/RAS/main.rst-727-
 Documentation/admin-guide/RAS/main.rst:728:			edac_panic_on_pci_pe=[0|1]
 Documentation/admin-guide/RAS/main.rst-729-
 --
 Documentation/admin-guide/RAS/main.rst-731-
 Documentation/admin-guide/RAS/main.rst:732:		echo "1" > /sys/module/edac_core/parameters/edac_panic_on_pci_pe
 Documentation/admin-guide/RAS/main.rst-733-
 --
 Documentation/admin-guide/RAS/main.rst-735-
 Documentation/admin-guide/RAS/main.rst:736:		echo "0" > /sys/module/edac_core/parameters/edac_panic_on_pci_pe
 Documentation/admin-guide/RAS/main.rst-737-
 --
 Documentation/admin-guide/RAS/main.rst=760=The standard default controls are:
 --
 Documentation/admin-guide/RAS/main.rst-764-	log_ue		boolean to log UE events
 Documentation/admin-guide/RAS/main.rst:765:	panic_on_ue	boolean to ``panic`` the system if an UE is encountered
 Documentation/admin-guide/RAS/main.rst-766-			(default off, can be set true via startup script)
 --
 Documentation/admin-guide/blockdev/zram.rst=33=Following shows a typical sequence of steps for using zram.
 Documentation/admin-guide/blockdev/zram.rst-34-
 Documentation/admin-guide/blockdev/zram.rst:35:WARNING
 Documentation/admin-guide/blockdev/zram.rst-36-=======
 --
 Documentation/admin-guide/bug-hunting.rst=4=Kernel bug reports often come with a stack dump like the one below::
 --
 Documentation/admin-guide/bug-hunting.rst-6-	------------[ cut here ]------------
 Documentation/admin-guide/bug-hunting.rst:7:	WARNING: CPU: 1 PID: 28102 at kernel/module.c:1108 module_put+0x57/0x70
 Documentation/admin-guide/bug-hunting.rst-8-	Modules linked in: dvb_usb_gp8psk(-) dvb_usb dvb_core nvidia_drm(PO) nvidia_modeset(PO) snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore nvidia(PO) [last unloaded: rc_core]
 --
 Documentation/admin-guide/bug-hunting.rst=42=the issue, it may also contain the word **Oops**, as on this one::
 Documentation/admin-guide/bug-hunting.rst-43-
 Documentation/admin-guide/bug-hunting.rst:44:	BUG: unable to handle kernel NULL pointer dereference at   (null)
 Documentation/admin-guide/bug-hunting.rst-45-	IP: [<c06969d4>] iret_exc+0x7d0/0xa59
 --
 Documentation/admin-guide/bug-hunting.rst=52=we'll refer to "Oops" for all kinds of stack traces that need to be analyzed.
 Documentation/admin-guide/bug-hunting.rst-53-
 Documentation/admin-guide/bug-hunting.rst:54:If the kernel is compiled with ``CONFIG_DEBUG_INFO``, you can enhance the
 Documentation/admin-guide/bug-hunting.rst-55-quality of the stack trace by using ``scripts/decode_stacktrace.sh``.
 --
 Documentation/admin-guide/bug-hunting.rst=112=number of the OOPS from the ``vmlinux`` file.
 Documentation/admin-guide/bug-hunting.rst-113-
 Documentation/admin-guide/bug-hunting.rst:114:The usage of gdb works best on a kernel compiled with ``CONFIG_DEBUG_INFO``.
 Documentation/admin-guide/bug-hunting.rst-115-This can be set by running::
 Documentation/admin-guide/bug-hunting.rst-116-
 Documentation/admin-guide/bug-hunting.rst:117:  $ ./scripts/config -d COMPILE_TEST -e DEBUG_KERNEL -e DEBUG_INFO
 Documentation/admin-guide/bug-hunting.rst-118-
 Documentation/admin-guide/bug-hunting.rst:119:On a kernel compiled with ``CONFIG_DEBUG_INFO``, you can simply copy the
 Documentation/admin-guide/bug-hunting.rst-120-EIP value from the OOPS::
 --
 Documentation/admin-guide/bug-hunting.rst=124=And use GDB to translate that to human-readable form::
 --
 Documentation/admin-guide/bug-hunting.rst-128-
 Documentation/admin-guide/bug-hunting.rst:129:If you don't have ``CONFIG_DEBUG_INFO`` enabled, you use the function
 Documentation/admin-guide/bug-hunting.rst-130-offset from the OOPS::
 --
 Documentation/admin-guide/bug-hunting.rst-133-
 Documentation/admin-guide/bug-hunting.rst:134:And recompile the kernel with ``CONFIG_DEBUG_INFO`` enabled::
 Documentation/admin-guide/bug-hunting.rst-135-
 Documentation/admin-guide/bug-hunting.rst:136:  $ ./scripts/config -d COMPILE_TEST -e DEBUG_KERNEL -e DEBUG_INFO
 Documentation/admin-guide/bug-hunting.rst-137-  $ make vmlinux
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst=81=Various user visible config options
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-86-
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:87:  CONFIG_BFQ_CGROUP_DEBUG
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-88-	  Debug help. Right now some additional stats file show up in cgroup
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst=97=Proportional weight policy files
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-203-  blkio.avg_queue_size
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:204:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-205-	  The average queue size for this cgroup over the entire time of this
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-209-  blkio.group_wait_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:210:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-211-	  This is the amount of time the cgroup had to wait since it became busy
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-220-  blkio.empty_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:221:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-222-	  This is the amount of time a cgroup spends without any pending
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-229-  blkio.idle_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:230:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-231-	  This is the amount of time spent by the IO scheduler idling for a
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-238-  blkio.dequeue
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:239:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y. This
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-240-	  gives the statistics about how many a times a group was dequeued
 --
 Documentation/admin-guide/cgroup-v1/cpusets.rst=687=kernel internal allocations that must be satisfied, immediately.
 Documentation/admin-guide/cgroup-v1/cpusets.rst:688:The kernel may drop some request, in rare cases even panic, if a
 Documentation/admin-guide/cgroup-v1/cpusets.rst-689-GFP_ATOMIC alloc fails.  If the request cannot be satisfied within
 --
 Documentation/admin-guide/cgroup-v1/memcg_test.rst=65=Under below explanation, we assume CONFIG_SWAP=y.
 --
 Documentation/admin-guide/cgroup-v1/memcg_test.rst-278-
 Documentation/admin-guide/cgroup-v1/memcg_test.rst:279:	In this case, panic_on_oom shouldn't be invoked and tasks
 Documentation/admin-guide/cgroup-v1/memcg_test.rst-280-	in other groups shouldn't be killed.
 --
 Documentation/admin-guide/cgroup-v1/memory.rst=295=list.
 --
 Documentation/admin-guide/cgroup-v1/memory.rst-301-.. note::
 Documentation/admin-guide/cgroup-v1/memory.rst:302:   When panic_on_oom is set to "2", the whole system will panic.
 Documentation/admin-guide/cgroup-v1/memory.rst-303-
 --
 Documentation/admin-guide/cgroup-v1/memory.rst=545=memory.stat file includes following statistics:
 --
 Documentation/admin-guide/cgroup-v1/memory.rst-590-
 Documentation/admin-guide/cgroup-v1/memory.rst:591:  * additional vm parameters (depends on CONFIG_DEBUG_VM):
 Documentation/admin-guide/cgroup-v1/memory.rst-592-
 --
 Documentation/admin-guide/cgroup-v2.rst=1107=be exceeded by a CPU.
 Documentation/admin-guide/cgroup-v2.rst-1108-
 Documentation/admin-guide/cgroup-v2.rst:1109:WARNING: cgroup2 cpu controller doesn't yet support the (bandwidth) control of
 Documentation/admin-guide/cgroup-v2.rst-1110-realtime processes. For a kernel built with the CONFIG_RT_GROUP_SCHED option
 --
 Documentation/admin-guide/cifs/usage.rst=749=cifsFYI			If set to non-zero value, additional debug information
 --
 Documentation/admin-guide/cifs/usage.rst-754-			Some debugging statements are not compiled into the
 Documentation/admin-guide/cifs/usage.rst:755:			cifs kernel unless CONFIG_CIFS_DEBUG2 is enabled in the
 Documentation/admin-guide/cifs/usage.rst-756-			kernel configuration. cifsFYI may be set to one or
 --
 Documentation/admin-guide/clearing-warn-once.rst:1:Clearing WARN_ONCE
 Documentation/admin-guide/clearing-warn-once.rst-2-------------------
 Documentation/admin-guide/clearing-warn-once.rst-3-
 Documentation/admin-guide/clearing-warn-once.rst:4:WARN_ONCE / WARN_ON_ONCE / printk_once only emit a message once.
 Documentation/admin-guide/clearing-warn-once.rst-5-
 --
 Documentation/admin-guide/device-mapper/dm-crypt.rst=101=allow_discards
 --
 Documentation/admin-guide/device-mapper/dm-crypt.rst-104-
 Documentation/admin-guide/device-mapper/dm-crypt.rst:105:    WARNING: Assess the specific security risks carefully before enabling this
 Documentation/admin-guide/device-mapper/dm-crypt.rst-106-    option.  For example, allowing discards on encrypted devices may lead to
 --
 Documentation/admin-guide/device-mapper/dm-ima.rst=676=section above) has the following data format for 'verity' target.
 --
 Documentation/admin-guide/device-mapper/dm-ima.rst-699- verity_mode := "verity_mode=" <verity_mode_str>
 Documentation/admin-guide/device-mapper/dm-ima.rst:700: verity_mode_str := "ignore_corruption" | "restart_on_corruption" | "panic_on_corruption" | "invalid"
 Documentation/admin-guide/device-mapper/dm-ima.rst-701- yes_no := "y" | "n"
 --
 Documentation/admin-guide/device-mapper/verity.rst=81=restart_on_corruption
 --
 Documentation/admin-guide/device-mapper/verity.rst-85-
 Documentation/admin-guide/device-mapper/verity.rst:86:panic_on_corruption
 Documentation/admin-guide/device-mapper/verity.rst-87-    Panic the device when a corrupted block is discovered. This option is
 --
 Documentation/admin-guide/device-mapper/verity.rst=90=restart_on_error
 --
 Documentation/admin-guide/device-mapper/verity.rst-93-
 Documentation/admin-guide/device-mapper/verity.rst:94:panic_on_error
 Documentation/admin-guide/device-mapper/verity.rst-95-    Panic the device when an I/O error is detected. This option is
 Documentation/admin-guide/device-mapper/verity.rst-96-    not compatible with the restart_on_error option but can be combined
 Documentation/admin-guide/device-mapper/verity.rst:97:    with the panic_on_corruption option.
 Documentation/admin-guide/device-mapper/verity.rst-98-
 --
 Documentation/admin-guide/dynamic-debug-howto.rst=293=The ``dyndbg`` option is a "fake" module parameter, which means:
 --
 Documentation/admin-guide/dynamic-debug-howto.rst-299-
 Documentation/admin-guide/dynamic-debug-howto.rst:300:For ``CONFIG_DYNAMIC_DEBUG`` kernels, any settings given at boot-time (or
 Documentation/admin-guide/dynamic-debug-howto.rst:301:enabled by ``-DDEBUG`` flag during compilation) can be disabled later via
 Documentation/admin-guide/dynamic-debug-howto.rst-302-the debugfs interface if the debug messages are no longer needed::
 --
 Documentation/admin-guide/dynamic-debug-howto.rst=353=Dynamic Debug is enabled via kernel config items::
 Documentation/admin-guide/dynamic-debug-howto.rst-354-
 Documentation/admin-guide/dynamic-debug-howto.rst:355:  CONFIG_DYNAMIC_DEBUG=y	# build catalog, enables CORE
 Documentation/admin-guide/dynamic-debug-howto.rst:356:  CONFIG_DYNAMIC_DEBUG_CORE=y	# enable mechanics only, skip catalog
]
]

gemini-3-flash-preview

							input: 27868
							output: 19
							thoughts: 41
						

Okay, here's my summary, in the first person, as an expert in my field, reflecting on the process:

**Streamlining File Searching: `grepper`, `codesearch-file-index`, and the Power of `grep`**

Alright, I'm thinking about how to efficiently locate specific content within a file. My first instinct, and this is typically how I've approached this, is to consider how I need to specify the file itself to begin this process. So I would have considered using `grepper`, which I would use to pass that file information into it or using a more sophisticated approach with `codesearch-file-index` followed by a direct `read-file` operation to get the content.

Then I paused and considered the simplest and most efficient tool at hand: `grep`. It's a quick, dirty, and usually effective solution. It's often the best approach for just searching a file directly, especially for a quick search. Sometimes the fancy tooling isn't worth the overhead. `grep` it is.

map[Expression:WARN|BUG|panic]

map[Output:
Full output is too long, showing 500 out of 547899 lines.
Use more precise expression if possible.

[CREDITS=1536=E: dth@cistron.nl
 CREDITS:1537:D: /proc/cpuinfo, reboot on panic , kernel pre-patch tester ;)
 CREDITS-1538-S: Cistron
 --
 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump=32=Description:	read only
 --
 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump-34-		loaded into memory. It shows 1 if a crash kernel has been
 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump:35:		successfully loaded for panic handling, or 0 if no crash
 Documentation/ABI/obsolete/sysfs-kernel-kexec-kdump-36-		kernel is present.
 --
 Documentation/ABI/removed/sysfs-mce=4=Description:
 --
 Documentation/ABI/removed/sysfs-mce-26-		==  ===========================================================
 Documentation/ABI/removed/sysfs-mce:27:		 0  always panic on uncorrected errors, log corrected errors
 Documentation/ABI/removed/sysfs-mce:28:		 1  panic or SIGBUS on uncorrected errors, log corrected errors
 Documentation/ABI/removed/sysfs-mce-29-		 2  SIGBUS or log uncorrected errors, log corrected errors
 Documentation/ABI/removed/sysfs-mce:30:		 3  never panic or SIGBUS, log all errors (for testing only)
 Documentation/ABI/removed/sysfs-mce-31-		==  ===========================================================
 --
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage=4=Description:
 --
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage-12-				are 2..4. Available only if
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage:13:				CONFIG_USB_GADGET_DEBUG_FILES is set.
 Documentation/ABI/testing/configfs-usb-gadget-mass-storage-14-		===========	==============================================
 --
 Documentation/ABI/testing/debugfs-cros-ec=4=Description:
 --
 Documentation/ABI/testing/debugfs-cros-ec-9-
 Documentation/ABI/testing/debugfs-cros-ec:10:What:		/sys/kernel/debug/<cros-ec-device>/panicinfo
 Documentation/ABI/testing/debugfs-cros-ec-11-Date:		September 2017
 --
 Documentation/ABI/testing/debugfs-cros-ec=13=Description:
 Documentation/ABI/testing/debugfs-cros-ec:14:		This file dumps the EC panic information from the previous
 Documentation/ABI/testing/debugfs-cros-ec-15-		reboot. This file will only exist if the PANIC_INFO command
 --
 Documentation/ABI/testing/ima_policy=4=Description:
 --
 Documentation/ABI/testing/ima_policy-87-			dont_appraise fsmagic=0x62656572
 Documentation/ABI/testing/ima_policy:88:			# DEBUGFS_MAGIC
 Documentation/ABI/testing/ima_policy-89-			dont_measure fsmagic=0x64626720
 --
 Documentation/ABI/testing/pstore=6=Description:	Generic interface to platform dependent persistent storage.
 --
 Documentation/ABI/testing/pstore-10-		provide a generic interface to show records captured in
 Documentation/ABI/testing/pstore:11:		the dying moments.  In the case of a panic the last part
 Documentation/ABI/testing/pstore-12-		of the console log is captured, but other interesting
 --
 Documentation/ABI/testing/pstore-38-		The 'kmsg_bytes' mount option changes the target amount of
 Documentation/ABI/testing/pstore:39:		data saved on each oops/panic. Pstore saves (possibly
 Documentation/ABI/testing/pstore-40-		multiple) files based on the record size of the underlying
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic=1=What:		/sys/devices/pci0000:00/*/QEMU0001:00/capability for MMIO
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:2:		/sys/bus/pci/drivers/pvpanic-pci/0000:00:0*.0/capability for PCI
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-3-Date:		Jan 2021
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic=5=Description:
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:6:		Read-only attribute. Capabilities of pvpanic device which
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-7-		are supported by QEMU.
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-11-		Detailed bit definition refers to section <Bit Definition>
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:12:		from pvpanic device specification:
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:13:		https://git.qemu.org/?p=qemu.git;a=blob_plain;f=docs/specs/pvpanic.txt
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-14-
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic=15=What:		/sys/devices/pci0000:00/*/QEMU0001:00/events
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:16:		/sys/bus/pci/drivers/pvpanic-pci/0000:00:0*.0/events for PCI
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-17-Date:		Jan 2021
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic=19=Description:
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-20-		RW attribute. Set/get which features in-use. This attribute
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:21:		is used to enable/disable feature(s) of pvpanic device.
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-22-		Notice that this value should be a subset of capability.
 --
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic-25-
 Documentation/ABI/testing/sysfs-bus-pci-devices-pvpanic:26:		Also refer to pvpanic device specification.
 --
 Documentation/ABI/testing/sysfs-class-thermal=101=Description:
 --
 Documentation/ABI/testing/sysfs-class-thermal-113-
 Documentation/ABI/testing/sysfs-class-thermal:114:		WARNING:
 Documentation/ABI/testing/sysfs-class-thermal-115-		    Be careful while enabling this option on production systems,
 --
 Documentation/ABI/testing/sysfs-devices-edac=34=Description:	This attribute file displays the total count of uncorrectable
 Documentation/ABI/testing/sysfs-devices-edac-35-		errors that have occurred on this memory controller. If
 Documentation/ABI/testing/sysfs-devices-edac:36:		panic_on_ue is set, this counter will not have a chance to
 Documentation/ABI/testing/sysfs-devices-edac:37:		increment, since EDAC will panic the system
 Documentation/ABI/testing/sysfs-devices-edac-38-
 --
 Documentation/ABI/testing/sysfs-devices-edac=116=Description:	This control file allows this DIMM to have a label assigned
 --
 Documentation/ABI/testing/sysfs-devices-edac-118-		the output can provide the DIMM label in the system log.
 Documentation/ABI/testing/sysfs-devices-edac:119:		This becomes vital for panic events to isolate the
 Documentation/ABI/testing/sysfs-devices-edac-120-		cause of the UE event.
 --
 Documentation/ABI/testing/sysfs-devices-edac=154=Description:	This attribute file displays the total count of uncorrectable
 Documentation/ABI/testing/sysfs-devices-edac:155:		errors that have occurred on this DIMM. If panic_on_ue is set, this
 Documentation/ABI/testing/sysfs-devices-edac:156:		counter will not have a chance to increment, since EDAC will panic the
 Documentation/ABI/testing/sysfs-devices-edac-157-		system
 --
 Documentation/ABI/testing/sysfs-driver-st=5=Description:
 --
 Documentation/ABI/testing/sysfs-driver-st-8-		Note that debug output requires that the module be compiled
 Documentation/ABI/testing/sysfs-driver-st:9:		with the #define DEBUG set to a non-zero value (this is the
 Documentation/ABI/testing/sysfs-driver-st:10:		default). If DEBUG is set to 0 then this file will not
 Documentation/ABI/testing/sysfs-driver-st-11-		appear in sysfs as its presence is conditional upon debug
 --
 Documentation/ABI/testing/sysfs-kernel-kexec-kdump=22=Description:	read only
 --
 Documentation/ABI/testing/sysfs-kernel-kexec-kdump-24-		loaded into memory. It shows 1 if a crash kernel has been
 Documentation/ABI/testing/sysfs-kernel-kexec-kdump:25:		successfully loaded for panic handling, or 0 if no crash
 Documentation/ABI/testing/sysfs-kernel-kexec-kdump-26-		kernel is present.
 --
 Documentation/ABI/testing/sysfs-mce=4=Description:
 --
 Documentation/ABI/testing/sysfs-mce-8-		detected by the CPU. Uncorrected errors typically cause a
 Documentation/ABI/testing/sysfs-mce:9:		machine check (often with panic), corrected ones cause a
 Documentation/ABI/testing/sysfs-mce-10-		machine check log entry.
 --
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl=83=Description:
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl-84-		The file used to write BlueField boot log with the format
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl:85:                "[INFO|WARN|ERR|ASSERT ]<msg>". Log level 'INFO' is used by
 Documentation/ABI/testing/sysfs-platform-mellanox-bootctl-86-                default if not specified.
 --
 Documentation/Kconfig=3=menu "Documentation"
 Documentation/Kconfig-4-
 Documentation/Kconfig:5:config WARN_MISSING_DOCUMENTS
 Documentation/Kconfig-6-	bool "Warn if there's a missing documentation file"
 --
 Documentation/Kconfig-14-
 Documentation/Kconfig:15:config WARN_ABI_ERRORS
 Documentation/Kconfig-16-	bool "Warn if there are errors at ABI files"
 --
 Documentation/Makefile=8=ifneq ($(MAKECMDGOALS),cleandocs)
 Documentation/Makefile-9-# Check for broken documentation file references
 Documentation/Makefile:10:ifeq ($(CONFIG_WARN_MISSING_DOCUMENTS),y)
 Documentation/Makefile-11-$(shell $(srctree)/tools/docs/documentation-file-ref-check --warn)
 Documentation/Makefile=12=endif
 --
 Documentation/Makefile-14-# Check for broken ABI files
 Documentation/Makefile:15:ifeq ($(CONFIG_WARN_ABI_ERRORS),y)
 Documentation/Makefile-16-$(shell $(srctree)/tools/docs/get_abi.py --dir $(srctree)/Documentation/ABI validate)
 --
 Documentation/PCI/pci-error-recovery.rst=306=device initialization routines, and an unusual config space setup
 Documentation/PCI/pci-error-recovery.rst:307:may result in hung devices, kernel panics, or silent data corruption.
 Documentation/PCI/pci-error-recovery.rst-308-
 --
 Documentation/PCI/pci.rst=200=the PCI device by calling pci_enable_device(). This will:
 --
 Documentation/PCI/pci.rst-209-.. warning::
 Documentation/PCI/pci.rst:210:   OS BUG: we don't check resource allocations before enabling those
 Documentation/PCI/pci.rst-211-   resources. The sequence would make more sense if we called
 --
 Documentation/PCI/pci.rst=250=The idea is to prevent two devices colliding on the same address range.
 --
 Documentation/PCI/pci.rst-252-.. tip::
 Documentation/PCI/pci.rst:253:   See OS BUG comment above. Currently (2.6.19), The driver can only
 Documentation/PCI/pci.rst-254-   determine MMIO and IO Port resource availability _after_ calling
 --
 Documentation/PCI/pci.rst=432=driver isn't losing resources from that other subsystem.
 Documentation/PCI/pci.rst:433:If this happens, typically the symptom is an Oops (panic) when
 Documentation/PCI/pci.rst-434-the subsystem attempts to call into a driver that has been unloaded.
 --
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=78=lock-acquisition and lock-release functions::
 --
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-104-   25
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:105:   26 WARN_ON(r1 == 0 && r2 == 0 && r3 == 0);
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-106-
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:107:The ``WARN_ON()`` is evaluated at "the end of time",
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-108-after all changes have propagated throughout the system.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=109=Without the ``smp_mb__after_unlock_lock()`` provided by the
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:110:acquisition functions, this ``WARN_ON()`` could trigger, for example
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-111-on PowerPC.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst=112=The ``smp_mb__after_unlock_lock()`` invocations prevent this
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst:113:``WARN_ON()`` from triggering.
 Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst-114-
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=203=non-\ ``NULL``, locklessly accessing the ``->a`` and ``->b`` fields.
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-218-      12   p->b = a;
 Documentation/RCU/Design/Requirements/Requirements.rst:219:      13   gp = p; /* ORDERING BUG */
 Documentation/RCU/Design/Requirements/Requirements.rst-220-      14   spin_unlock(&gp_lock);
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=225=their rights to reorder this code as follows:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-238-      10   }
 Documentation/RCU/Design/Requirements/Requirements.rst:239:      11   gp = p; /* ORDERING BUG */
 Documentation/RCU/Design/Requirements/Requirements.rst-240-      12   p->a = a;
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=755=example illustrates this:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-765-       7     r2 = READ_ONCE(x);
 Documentation/RCU/Design/Requirements/Requirements.rst:766:       8     WARN_ON(!r2); /* BUG!!! */
 Documentation/RCU/Design/Requirements/Requirements.rst-767-       9   }
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=779=If the thread0() function's rcu_read_lock() excluded the
 Documentation/RCU/Design/Requirements/Requirements.rst:780:thread1() function's update, the WARN_ON() could never fire. But
 Documentation/RCU/Design/Requirements/Requirements.rst-781-the fact is that rcu_read_lock() does not exclude much of anything
 Documentation/RCU/Design/Requirements/Requirements.rst=782=aside from subsequent grace periods, of which thread1() has none, so
 Documentation/RCU/Design/Requirements/Requirements.rst:783:the WARN_ON() can and does fire.
 Documentation/RCU/Design/Requirements/Requirements.rst-784-
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=1585=against mishaps and misuse:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-1615-   needed `patch series <https://lwn.net/Articles/376011/>`__.
 Documentation/RCU/Design/Requirements/Requirements.rst:1616:#. Kernels built with ``CONFIG_DEBUG_OBJECTS_RCU_HEAD=y`` will splat if
 Documentation/RCU/Design/Requirements/Requirements.rst-1617-   a data element is passed to call_rcu() twice in a row, without a
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-1641-   stall warnings are counter-productive during sysrq dumps and during
 Documentation/RCU/Design/Requirements/Requirements.rst:1642:   panics. RCU therefore supplies the rcu_sysrq_start() and
 Documentation/RCU/Design/Requirements/Requirements.rst-1643-   rcu_sysrq_end() API members to be called before and after long
 Documentation/RCU/Design/Requirements/Requirements.rst:1644:   sysrq dumps. RCU also supplies the rcu_panic() notifier that is
 Documentation/RCU/Design/Requirements/Requirements.rst:1645:   automatically invoked at the beginning of a panic to suppress further
 Documentation/RCU/Design/Requirements/Requirements.rst-1646-   RCU CPU stall warnings.
 --
 Documentation/RCU/Design/Requirements/Requirements.rst=2156=the following:
 --
 Documentation/RCU/Design/Requirements/Requirements.rst-2161-       2 p = rcu_dereference(gp);
 Documentation/RCU/Design/Requirements/Requirements.rst:2162:       3 get_user(user_v, user_p); // BUG: POSSIBLE PAGE FAULT!!!
 Documentation/RCU/Design/Requirements/Requirements.rst-2163-       4 v = p->value;
 --
 Documentation/RCU/checklist.rst=12=over a rather long period of time, but improvements are always welcome!
 --
 Documentation/RCU/checklist.rst-488-
 Documentation/RCU/checklist.rst:489:16.	Use CONFIG_PROVE_LOCKING, CONFIG_DEBUG_OBJECTS_RCU_HEAD, and the
 Documentation/RCU/checklist.rst-490-	__rcu sparse checks to validate your RCU code.	These can help
 --
 Documentation/RCU/checklist.rst-498-
 Documentation/RCU/checklist.rst:499:	CONFIG_DEBUG_OBJECTS_RCU_HEAD:
 Documentation/RCU/checklist.rst-500-		check that you don't pass the same object to call_rcu()
 --
 Documentation/RCU/lockdep-splat.rst=21=has long since been fixed::
 --
 Documentation/RCU/lockdep-splat.rst-23-    =============================
 Documentation/RCU/lockdep-splat.rst:24:    WARNING: suspicious RCU usage
 Documentation/RCU/lockdep-splat.rst-25-    -----------------------------
 --
 Documentation/RCU/lockdep.rst=24=These functions are conservative, and will therefore return 1 if they
 Documentation/RCU/lockdep.rst:25:aren't certain (for example, if CONFIG_DEBUG_LOCK_ALLOC is not set).
 Documentation/RCU/lockdep.rst:26:This prevents things like WARN_ON(!rcu_read_lock_held()) from giving false
 Documentation/RCU/lockdep.rst-27-positives when lockdep is disabled.
 --
 Documentation/RCU/rcu_dereference.rst=25=readers working properly:
 --
 Documentation/RCU/rcu_dereference.rst-98-		q += p > &oom_p;
 Documentation/RCU/rcu_dereference.rst:99:		r1 = *q;  /* BUGGY!!! */
 Documentation/RCU/rcu_dereference.rst-100-
 --
 Documentation/RCU/rcu_dereference.rst-188-		of such an RCU usage bug is shown in the section titled
 Documentation/RCU/rcu_dereference.rst:189:		"EXAMPLE OF AMPLIFIED RCU-USAGE BUG".
 Documentation/RCU/rcu_dereference.rst-190-
 --
 Documentation/RCU/rcu_dereference.rst-218-
 Documentation/RCU/rcu_dereference.rst:219:EXAMPLE OF AMPLIFIED RCU-USAGE BUG
 Documentation/RCU/rcu_dereference.rst-220-----------------------------------
 --
 Documentation/RCU/rcubarrier.rst=194=The original code for rcu_barrier() was roughly as follows::
 --
 Documentation/RCU/rcubarrier.rst-197-  2  {
 Documentation/RCU/rcubarrier.rst:198:  3    BUG_ON(in_interrupt());
 Documentation/RCU/rcubarrier.rst-199-  4    /* Take cpucontrol mutex to protect against CPU hotplug */
 --
 Documentation/RCU/stallwarn.rst=18=warnings:
 --
 Documentation/RCU/stallwarn.rst-112-	ct_irq_enter() or ct_irq_exit(), respectively.  Building your
 Documentation/RCU/stallwarn.rst:113:	kernel with CONFIG_RCU_EQS_DEBUG=y can help track down these types
 Documentation/RCU/stallwarn.rst-114-	of issues, which sometimes arise in architecture-specific code.
 --
 Documentation/RCU/torture.rst=208=Sometimes additional debugging is useful, and in such cases the --kconfig
 Documentation/RCU/torture.rst:209:parameter to kvm.sh may be used, for example, ``--kconfig 'CONFIG_RCU_EQS_DEBUG=y'``.
 Documentation/RCU/torture.rst-210-In addition, there are the --gdb, --kasan, and --kcsan parameters.
 --
 Documentation/RCU/whatisRCU.rst=278=rcu_dereference()
 --
 Documentation/RCU/whatisRCU.rst-324-		rcu_read_unlock();
 Documentation/RCU/whatisRCU.rst:325:		x = p->address;	/* BUG!!! */
 Documentation/RCU/whatisRCU.rst-326-		rcu_read_lock();
 Documentation/RCU/whatisRCU.rst:327:		y = p->data;	/* BUG!!! */
 Documentation/RCU/whatisRCU.rst-328-		rcu_read_unlock();
 --
 Documentation/RCU/whatisRCU.rst=1237=All: lockdep-checked RCU utility APIs::
 Documentation/RCU/whatisRCU.rst-1238-
 Documentation/RCU/whatisRCU.rst:1239:	RCU_LOCKDEP_WARN
 Documentation/RCU/whatisRCU.rst-1240-	rcu_sleep_check
 --
 Documentation/accel/qaic/aic100.rst=187=of the defined channels, and their uses.
 --
 Documentation/accel/qaic/aic100.rst-221-+----------------+---------+----------+----------------------------------------+
 Documentation/accel/qaic/aic100.rst:222:| QAIC_DEBUG     | 18 & 19 | AMSS     | Not used.                              |
 Documentation/accel/qaic/aic100.rst-223-+----------------+---------+----------+----------------------------------------+
 --
 Documentation/admin-guide/LSM/ipe.rst=622=boot_verified
 --
 Documentation/admin-guide/LSM/ipe.rst-630-
 Documentation/admin-guide/LSM/ipe.rst:631:   .. WARNING::
 Documentation/admin-guide/LSM/ipe.rst-632-
 --
 Documentation/admin-guide/RAS/main.rst=240=modules exhibiting CEs can reduce the likelihood of the dreaded UE events
 Documentation/admin-guide/RAS/main.rst:241:and system panics.
 Documentation/admin-guide/RAS/main.rst-242-
 --
 Documentation/admin-guide/RAS/main.rst=480=this ``X`` memory module:
 --
 Documentation/admin-guide/RAS/main.rst-489-	This attribute file displays the total count of uncorrectable
 Documentation/admin-guide/RAS/main.rst:490:	errors that have occurred on this DIMM. If panic_on_ue is set
 Documentation/admin-guide/RAS/main.rst-491-	this counter will not have a chance to increment, since EDAC
 Documentation/admin-guide/RAS/main.rst:492:	will panic the system.
 Documentation/admin-guide/RAS/main.rst-493-
 --
 Documentation/admin-guide/RAS/main.rst-523-	the output can provide the DIMM label in the system log.
 Documentation/admin-guide/RAS/main.rst:524:	This becomes vital for panic events to isolate the
 Documentation/admin-guide/RAS/main.rst-525-	cause of the UE event.
 --
 Documentation/admin-guide/RAS/main.rst=647=Module parameters
 --
 Documentation/admin-guide/RAS/main.rst-649-
 Documentation/admin-guide/RAS/main.rst:650:- ``edac_mc_panic_on_ue`` - Panic on UE control file
 Documentation/admin-guide/RAS/main.rst-651-
 Documentation/admin-guide/RAS/main.rst:652:	An uncorrectable error will cause a machine panic.  This is usually
 Documentation/admin-guide/RAS/main.rst-653-	desirable.  It is a bad idea to continue when an uncorrectable error
 --
 Documentation/admin-guide/RAS/main.rst-660-
 Documentation/admin-guide/RAS/main.rst:661:		module/kernel parameter: edac_mc_panic_on_ue=[0|1]
 Documentation/admin-guide/RAS/main.rst-662-
 --
 Documentation/admin-guide/RAS/main.rst-664-
 Documentation/admin-guide/RAS/main.rst:665:		echo "1" > /sys/module/edac_core/parameters/edac_mc_panic_on_ue
 Documentation/admin-guide/RAS/main.rst-666-
 --
 Documentation/admin-guide/RAS/main.rst-718-
 Documentation/admin-guide/RAS/main.rst:719:- ``panic_on_pci_parity`` - Panic on PCI PARITY Error
 Documentation/admin-guide/RAS/main.rst-720-
 Documentation/admin-guide/RAS/main.rst-721-
 Documentation/admin-guide/RAS/main.rst:722:	This control file enables or disables panicking when a parity
 Documentation/admin-guide/RAS/main.rst-723-	error has been detected.
 --
 Documentation/admin-guide/RAS/main.rst-727-
 Documentation/admin-guide/RAS/main.rst:728:			edac_panic_on_pci_pe=[0|1]
 Documentation/admin-guide/RAS/main.rst-729-
 --
 Documentation/admin-guide/RAS/main.rst-731-
 Documentation/admin-guide/RAS/main.rst:732:		echo "1" > /sys/module/edac_core/parameters/edac_panic_on_pci_pe
 Documentation/admin-guide/RAS/main.rst-733-
 --
 Documentation/admin-guide/RAS/main.rst-735-
 Documentation/admin-guide/RAS/main.rst:736:		echo "0" > /sys/module/edac_core/parameters/edac_panic_on_pci_pe
 Documentation/admin-guide/RAS/main.rst-737-
 --
 Documentation/admin-guide/RAS/main.rst=760=The standard default controls are:
 --
 Documentation/admin-guide/RAS/main.rst-764-	log_ue		boolean to log UE events
 Documentation/admin-guide/RAS/main.rst:765:	panic_on_ue	boolean to ``panic`` the system if an UE is encountered
 Documentation/admin-guide/RAS/main.rst-766-			(default off, can be set true via startup script)
 --
 Documentation/admin-guide/blockdev/zram.rst=33=Following shows a typical sequence of steps for using zram.
 Documentation/admin-guide/blockdev/zram.rst-34-
 Documentation/admin-guide/blockdev/zram.rst:35:WARNING
 Documentation/admin-guide/blockdev/zram.rst-36-=======
 --
 Documentation/admin-guide/bug-hunting.rst=4=Kernel bug reports often come with a stack dump like the one below::
 --
 Documentation/admin-guide/bug-hunting.rst-6-	------------[ cut here ]------------
 Documentation/admin-guide/bug-hunting.rst:7:	WARNING: CPU: 1 PID: 28102 at kernel/module.c:1108 module_put+0x57/0x70
 Documentation/admin-guide/bug-hunting.rst-8-	Modules linked in: dvb_usb_gp8psk(-) dvb_usb dvb_core nvidia_drm(PO) nvidia_modeset(PO) snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore nvidia(PO) [last unloaded: rc_core]
 --
 Documentation/admin-guide/bug-hunting.rst=42=the issue, it may also contain the word **Oops**, as on this one::
 Documentation/admin-guide/bug-hunting.rst-43-
 Documentation/admin-guide/bug-hunting.rst:44:	BUG: unable to handle kernel NULL pointer dereference at   (null)
 Documentation/admin-guide/bug-hunting.rst-45-	IP: [<c06969d4>] iret_exc+0x7d0/0xa59
 --
 Documentation/admin-guide/bug-hunting.rst=52=we'll refer to "Oops" for all kinds of stack traces that need to be analyzed.
 Documentation/admin-guide/bug-hunting.rst-53-
 Documentation/admin-guide/bug-hunting.rst:54:If the kernel is compiled with ``CONFIG_DEBUG_INFO``, you can enhance the
 Documentation/admin-guide/bug-hunting.rst-55-quality of the stack trace by using ``scripts/decode_stacktrace.sh``.
 --
 Documentation/admin-guide/bug-hunting.rst=112=number of the OOPS from the ``vmlinux`` file.
 Documentation/admin-guide/bug-hunting.rst-113-
 Documentation/admin-guide/bug-hunting.rst:114:The usage of gdb works best on a kernel compiled with ``CONFIG_DEBUG_INFO``.
 Documentation/admin-guide/bug-hunting.rst-115-This can be set by running::
 Documentation/admin-guide/bug-hunting.rst-116-
 Documentation/admin-guide/bug-hunting.rst:117:  $ ./scripts/config -d COMPILE_TEST -e DEBUG_KERNEL -e DEBUG_INFO
 Documentation/admin-guide/bug-hunting.rst-118-
 Documentation/admin-guide/bug-hunting.rst:119:On a kernel compiled with ``CONFIG_DEBUG_INFO``, you can simply copy the
 Documentation/admin-guide/bug-hunting.rst-120-EIP value from the OOPS::
 --
 Documentation/admin-guide/bug-hunting.rst=124=And use GDB to translate that to human-readable form::
 --
 Documentation/admin-guide/bug-hunting.rst-128-
 Documentation/admin-guide/bug-hunting.rst:129:If you don't have ``CONFIG_DEBUG_INFO`` enabled, you use the function
 Documentation/admin-guide/bug-hunting.rst-130-offset from the OOPS::
 --
 Documentation/admin-guide/bug-hunting.rst-133-
 Documentation/admin-guide/bug-hunting.rst:134:And recompile the kernel with ``CONFIG_DEBUG_INFO`` enabled::
 Documentation/admin-guide/bug-hunting.rst-135-
 Documentation/admin-guide/bug-hunting.rst:136:  $ ./scripts/config -d COMPILE_TEST -e DEBUG_KERNEL -e DEBUG_INFO
 Documentation/admin-guide/bug-hunting.rst-137-  $ make vmlinux
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst=81=Various user visible config options
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-86-
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:87:  CONFIG_BFQ_CGROUP_DEBUG
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-88-	  Debug help. Right now some additional stats file show up in cgroup
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst=97=Proportional weight policy files
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-203-  blkio.avg_queue_size
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:204:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-205-	  The average queue size for this cgroup over the entire time of this
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-209-  blkio.group_wait_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:210:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-211-	  This is the amount of time the cgroup had to wait since it became busy
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-220-  blkio.empty_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:221:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-222-	  This is the amount of time a cgroup spends without any pending
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-229-  blkio.idle_time
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:230:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y.
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-231-	  This is the amount of time spent by the IO scheduler idling for a
 --
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-238-  blkio.dequeue
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst:239:	  Debugging aid only enabled if CONFIG_BFQ_CGROUP_DEBUG=y. This
 Documentation/admin-guide/cgroup-v1/blkio-controller.rst-240-	  gives the statistics about how many a times a group was dequeued
 --
 Documentation/admin-guide/cgroup-v1/cpusets.rst=687=kernel internal allocations that must be satisfied, immediately.
 Documentation/admin-guide/cgroup-v1/cpusets.rst:688:The kernel may drop some request, in rare cases even panic, if a
 Documentation/admin-guide/cgroup-v1/cpusets.rst-689-GFP_ATOMIC alloc fails.  If the request cannot be satisfied within
 --
 Documentation/admin-guide/cgroup-v1/memcg_test.rst=65=Under below explanation, we assume CONFIG_SWAP=y.
 --
 Documentation/admin-guide/cgroup-v1/memcg_test.rst-278-
 Documentation/admin-guide/cgroup-v1/memcg_test.rst:279:	In this case, panic_on_oom shouldn't be invoked and tasks
 Documentation/admin-guide/cgroup-v1/memcg_test.rst-280-	in other groups shouldn't be killed.
 --
 Documentation/admin-guide/cgroup-v1/memory.rst=295=list.
 --
 Documentation/admin-guide/cgroup-v1/memory.rst-301-.. note::
 Documentation/admin-guide/cgroup-v1/memory.rst:302:   When panic_on_oom is set to "2", the whole system will panic.
 Documentation/admin-guide/cgroup-v1/memory.rst-303-
 --
 Documentation/admin-guide/cgroup-v1/memory.rst=545=memory.stat file includes following statistics:
 --
 Documentation/admin-guide/cgroup-v1/memory.rst-590-
 Documentation/admin-guide/cgroup-v1/memory.rst:591:  * additional vm parameters (depends on CONFIG_DEBUG_VM):
 Documentation/admin-guide/cgroup-v1/memory.rst-592-
 --
 Documentation/admin-guide/cgroup-v2.rst=1107=be exceeded by a CPU.
 Documentation/admin-guide/cgroup-v2.rst-1108-
 Documentation/admin-guide/cgroup-v2.rst:1109:WARNING: cgroup2 cpu controller doesn't yet support the (bandwidth) control of
 Documentation/admin-guide/cgroup-v2.rst-1110-realtime processes. For a kernel built with the CONFIG_RT_GROUP_SCHED option
 --
 Documentation/admin-guide/cifs/usage.rst=749=cifsFYI			If set to non-zero value, additional debug information
 --
 Documentation/admin-guide/cifs/usage.rst-754-			Some debugging statements are not compiled into the
 Documentation/admin-guide/cifs/usage.rst:755:			cifs kernel unless CONFIG_CIFS_DEBUG2 is enabled in the
 Documentation/admin-guide/cifs/usage.rst-756-			kernel configuration. cifsFYI may be set to one or
 --
 Documentation/admin-guide/clearing-warn-once.rst:1:Clearing WARN_ONCE
 Documentation/admin-guide/clearing-warn-once.rst-2-------------------
 Documentation/admin-guide/clearing-warn-once.rst-3-
 Documentation/admin-guide/clearing-warn-once.rst:4:WARN_ONCE / WARN_ON_ONCE / printk_once only emit a message once.
 Documentation/admin-guide/clearing-warn-once.rst-5-
 --
 Documentation/admin-guide/device-mapper/dm-crypt.rst=101=allow_discards
 --
 Documentation/admin-guide/device-mapper/dm-crypt.rst-104-
 Documentation/admin-guide/device-mapper/dm-crypt.rst:105:    WARNING: Assess the specific security risks carefully before enabling this
 Documentation/admin-guide/device-mapper/dm-crypt.rst-106-    option.  For example, allowing discards on encrypted devices may lead to
 --
 Documentation/admin-guide/device-mapper/dm-ima.rst=676=section above) has the following data format for 'verity' target.
 --
 Documentation/admin-guide/device-mapper/dm-ima.rst-699- verity_mode := "verity_mode=" <verity_mode_str>
 Documentation/admin-guide/device-mapper/dm-ima.rst:700: verity_mode_str := "ignore_corruption" | "restart_on_corruption" | "panic_on_corruption" | "invalid"
 Documentation/admin-guide/device-mapper/dm-ima.rst-701- yes_no := "y" | "n"
 --
 Documentation/admin-guide/device-mapper/verity.rst=81=restart_on_corruption
 --
 Documentation/admin-guide/device-mapper/verity.rst-85-
 Documentation/admin-guide/device-mapper/verity.rst:86:panic_on_corruption
 Documentation/admin-guide/device-mapper/verity.rst-87-    Panic the device when a corrupted block is discovered. This option is
 --
 Documentation/admin-guide/device-mapper/verity.rst=90=restart_on_error
 --
 Documentation/admin-guide/device-mapper/verity.rst-93-
 Documentation/admin-guide/device-mapper/verity.rst:94:panic_on_error
 Documentation/admin-guide/device-mapper/verity.rst-95-    Panic the device when an I/O error is detected. This option is
 Documentation/admin-guide/device-mapper/verity.rst-96-    not compatible with the restart_on_error option but can be combined
 Documentation/admin-guide/device-mapper/verity.rst:97:    with the panic_on_corruption option.
 Documentation/admin-guide/device-mapper/verity.rst-98-
 --
 Documentation/admin-guide/dynamic-debug-howto.rst=293=The ``dyndbg`` option is a "fake" module parameter, which means:
 --
 Documentation/admin-guide/dynamic-debug-howto.rst-299-
 Documentation/admin-guide/dynamic-debug-howto.rst:300:For ``CONFIG_DYNAMIC_DEBUG`` kernels, any settings given at boot-time (or
 Documentation/admin-guide/dynamic-debug-howto.rst:301:enabled by ``-DDEBUG`` flag during compilation) can be disabled later via
 Documentation/admin-guide/dynamic-debug-howto.rst-302-the debugfs interface if the debug messages are no longer needed::
 --
 Documentation/admin-guide/dynamic-debug-howto.rst=353=Dynamic Debug is enabled via kernel config items::
 Documentation/admin-guide/dynamic-debug-howto.rst-354-
 Documentation/admin-guide/dynamic-debug-howto.rst:355:  CONFIG_DYNAMIC_DEBUG=y	# build catalog, enables CORE
 Documentation/admin-guide/dynamic-debug-howto.rst:356:  CONFIG_DYNAMIC_DEBUG_CORE=y	# enable mechanics only, skip catalog
]
]

gemini-3-flash-preview

							input: 39095
							output: 32
							thoughts: 71
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Troubleshooting a Grep Issue**

Alright, I'm hitting a wall with `grepper`. The problem is, it's casting too wide a net, returning way more results than I need. It's becoming noisy and inefficient. Ideally, I'd just bypass `grepper` entirely and go straight to `git grep`. I know I'd have more control there with things like `--pickaxe-all` and smarter context filtering. But I'm stuck within the confines of this toolchain, at least for now.

Wait a second… lightbulb! I can use `codesearch-file-index` to get a quick overview of what's *actually* in the file `net/mac80211/tdls.c`. Maybe I can narrow down my search terms by just getting a quick, high-level summary of that particular module. This should help me decide what search query to use and how to optimize it for my current environment with `grepper`.

map[SourceFile:net/mac80211/tdls.c]

map[Entities:[map[Kind:function Name:iee80211_tdls_add_ch_switch_timing] map[Kind:function Name:iee80211_tdls_have_ht_peers] map[Kind:function Name:iee80211_tdls_recalc_chanctx] map[Kind:function Name:iee80211_tdls_recalc_ht_protection] map[Kind:function Name:ieee80211_ac_from_wmm] map[Kind:function Name:ieee80211_get_tdls_sta_capab] map[Kind:function Name:ieee80211_prep_tdls_direct] map[Kind:function Name:ieee80211_prep_tdls_encap_data] map[Kind:function Name:ieee80211_process_tdls_channel_switch] map[Kind:function Name:ieee80211_process_tdls_channel_switch_req] map[Kind:function Name:ieee80211_process_tdls_channel_switch_resp] map[Kind:function Name:ieee80211_tdls_add_aid] map[Kind:function Name:ieee80211_tdls_add_bss_coex_ie] map[Kind:function Name:ieee80211_tdls_add_chan_switch_req_ies] map[Kind:function Name:ieee80211_tdls_add_chan_switch_resp_ies] map[Kind:function Name:ieee80211_tdls_add_ext_capab] map[Kind:function Name:ieee80211_tdls_add_ies] map[Kind:function Name:ieee80211_tdls_add_link_ie] map[Kind:function Name:ieee80211_tdls_add_oper_classes] map[Kind:function Name:ieee80211_tdls_add_setup_cfm_ies] map[Kind:function Name:ieee80211_tdls_add_setup_start_ies] map[Kind:function Name:ieee80211_tdls_add_subband] map[Kind:function Name:ieee80211_tdls_add_supp_channels] map[Kind:function Name:ieee80211_tdls_add_wmm_param_ie] map[Kind:function Name:ieee80211_tdls_build_mgmt_packet_data] map[Kind:function Name:ieee80211_tdls_cancel_channel_switch] map[Kind:function Name:ieee80211_tdls_ch_sw_resp_tmpl_get] map[Kind:function Name:ieee80211_tdls_ch_sw_tmpl_get] map[Kind:function Name:ieee80211_tdls_chandef_vht_upgrade] map[Kind:function Name:ieee80211_tdls_channel_switch] map[Kind:function Name:ieee80211_tdls_find_sw_timing_ie] map[Kind:function Name:ieee80211_tdls_handle_disconnect] map[Kind:function Name:ieee80211_tdls_mgmt] map[Kind:function Name:ieee80211_tdls_mgmt_setup] map[Kind:function Name:ieee80211_tdls_mgmt_teardown] map[Kind:function Name:ieee80211_tdls_oper] map[Kind:function Name:ieee80211_tdls_oper_request] map[Kind:function Name:ieee80211_tdls_peer_del_work] map[Kind:function Name:ieee80211_tdls_prep_mgmt_packet] map[Kind:function Name:ieee80211_teardown_tdls_peers] map[Kind:function Name:ieee80211_wmm_aci_aifsn] map[Kind:function Name:ieee80211_wmm_ecw] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_tdls_oper_request_2721] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_tdls_oper_request]]]

gemini-3-flash-preview

							input: 40657
							output: 28
							thoughts: 252
						

**My Approach to Locating Warning Statements in `tdls.c`**

Okay, so I need to find all instances of warning statements within the `net/mac80211/tdls.c` file. My first instinct was to use `read-file` and then search the output for "WARN". Seems a bit clumsy, though. I quickly realized that `grepper` might be more efficient with a targeted expression. It might be faster if the search criteria is specific, but then I remembered that `grepper` searches the entire tree, and I don't see an option to narrow the search down to a specific file. Bummer.

Ah, perhaps I could leverage `git grep` flags! No, the tool documentation says it has fixed flags, specifically `--extended-regexp --line-number --show-function -C1`. I can't pass a path that way.

Maybe `codesearch-find-references` for something like `WARN_ON`? That's likely going to yield too many results, casting too wide a net.

Alright, back to the basics. Let's try `grepper` again, but this time including the file path in the search expression. Wait, no, that's not how it works; it searches the *content*.

Fine, I'll go with `read-file` on `net/mac80211/tdls.c`. I know it might be a large file, but it's the most direct method to ensure I'm examining the code directly, given the limitations of the available tools. This seems the most robust approach to get the job done.

map[File:net/mac80211/tdls.c]

map[Contents:// SPDX-License-Identifier: GPL-2.0-only
/*
 * mac80211 TDLS handling code
 *
 * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2014, Intel Corporation
 * Copyright 2014  Intel Mobile Communications GmbH
 * Copyright 2015 - 2016 Intel Deutschland GmbH
 * Copyright (C) 2019, 2021-2025 Intel Corporation
 */

#include <linux/ieee80211.h>
#include <linux/log2.h>
#include <net/cfg80211.h>
#include <linux/rtnetlink.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "wme.h"

/* give usermode some time for retries in setting up the TDLS session */
#define TDLS_PEER_SETUP_TIMEOUT	(15 * HZ)

void ieee80211_tdls_peer_del_work(struct wiphy *wiphy, struct wiphy_work *wk)
{
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_local *local;

	sdata = container_of(wk, struct ieee80211_sub_if_data,
			     u.mgd.tdls_peer_del_work.work);
	local = sdata->local;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) {
		tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer);
		sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer);
		eth_zero_addr(sdata->u.mgd.tdls_peer);
	}
}

static void ieee80211_tdls_add_ext_capab(struct ieee80211_link_data *link,
					 struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	bool chan_switch = local->hw.wiphy->features &
			   NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
	bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
			  !ifmgd->tdls_wider_bw_prohibited;
	bool buffer_sta = ieee80211_hw_check(&local->hw,
					     SUPPORTS_TDLS_BUFFER_STA);
	struct ieee80211_supported_band *sband = ieee80211_get_link_sband(link);
	bool vht = sband && sband->vht_cap.vht_supported;
	u8 *pos = skb_put(skb, 10);

	*pos++ = WLAN_EID_EXT_CAPABILITY;
	*pos++ = 8; /* len */
	*pos++ = 0x0;
	*pos++ = 0x0;
	*pos++ = 0x0;
	*pos++ = (chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0) |
		 (buffer_sta ? WLAN_EXT_CAPA4_TDLS_BUFFER_STA : 0);
	*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
	*pos++ = 0;
	*pos++ = 0;
	*pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0;
}

static u8
ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata,
			   struct sk_buff *skb, u16 start, u16 end,
			   u16 spacing)
{
	u8 subband_cnt = 0, ch_cnt = 0;
	struct ieee80211_channel *ch;
	struct cfg80211_chan_def chandef;
	int i, subband_start;
	struct wiphy *wiphy = sdata->local->hw.wiphy;

	for (i = start; i <= end; i += spacing) {
		if (!ch_cnt)
			subband_start = i;

		ch = ieee80211_get_channel(sdata->local->hw.wiphy, i);
		if (ch) {
			/* we will be active on the channel */
			cfg80211_chandef_create(&chandef, ch,
						NL80211_CHAN_NO_HT);
			if (cfg80211_reg_can_beacon_relax(wiphy, &chandef,
							  sdata->wdev.iftype)) {
				ch_cnt++;
				/*
				 * check if the next channel is also part of
				 * this allowed range
				 */
				continue;
			}
		}

		/*
		 * we've reached the end of a range, with allowed channels
		 * found
		 */
		if (ch_cnt) {
			u8 *pos = skb_put(skb, 2);
			*pos++ = ieee80211_frequency_to_channel(subband_start);
			*pos++ = ch_cnt;

			subband_cnt++;
			ch_cnt = 0;
		}
	}

	/* all channels in the requested range are allowed - add them here */
	if (ch_cnt) {
		u8 *pos = skb_put(skb, 2);
		*pos++ = ieee80211_frequency_to_channel(subband_start);
		*pos++ = ch_cnt;

		subband_cnt++;
	}

	return subband_cnt;
}

static void
ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata,
				 struct sk_buff *skb)
{
	/*
	 * Add possible channels for TDLS. These are channels that are allowed
	 * to be active.
	 */
	u8 subband_cnt;
	u8 *pos = skb_put(skb, 2);

	*pos++ = WLAN_EID_SUPPORTED_CHANNELS;

	/*
	 * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as
	 * this doesn't happen in real world scenarios.
	 */

	/* 2GHz, with 5MHz spacing */
	subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5);

	/* 5GHz, with 20MHz spacing */
	subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20);

	/* length */
	*pos = 2 * subband_cnt;
}

static void ieee80211_tdls_add_oper_classes(struct ieee80211_link_data *link,
					    struct sk_buff *skb)
{
	u8 *pos;
	u8 op_class;

	if (!ieee80211_chandef_to_operating_class(&link->conf->chanreq.oper,
						  &op_class))
		return;

	pos = skb_put(skb, 4);
	*pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES;
	*pos++ = 2; /* len */

	*pos++ = op_class;
	*pos++ = op_class; /* give current operating class as alternate too */
}

static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb)
{
	u8 *pos = skb_put(skb, 3);

	*pos++ = WLAN_EID_BSS_COEX_2040;
	*pos++ = 1; /* len */

	*pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST;
}

static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_link_data *link,
					u16 status_code)
{
	struct ieee80211_supported_band *sband;

	/* The capability will be 0 when sending a failure code */
	if (status_code != 0)
		return 0;

	sband = ieee80211_get_link_sband(link);

	if (sband && sband->band == NL80211_BAND_2GHZ) {
		return WLAN_CAPABILITY_SHORT_SLOT_TIME |
		       WLAN_CAPABILITY_SHORT_PREAMBLE;
	}

	return 0;
}

static void ieee80211_tdls_add_link_ie(struct ieee80211_link_data *link,
				       struct sk_buff *skb, const u8 *peer,
				       bool initiator)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_tdls_lnkie *lnkid;
	const u8 *init_addr, *rsp_addr;

	if (initiator) {
		init_addr = sdata->vif.addr;
		rsp_addr = peer;
	} else {
		init_addr = peer;
		rsp_addr = sdata->vif.addr;
	}

	lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));

	lnkid->ie_type = WLAN_EID_LINK_ID;
	lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;

	memcpy(lnkid->bssid, link->u.mgd.bssid, ETH_ALEN);
	memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
	memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
}

static void
ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
{
	u8 *pos = skb_put(skb, 4);

	*pos++ = WLAN_EID_AID;
	*pos++ = 2; /* len */
	put_unaligned_le16(sdata->vif.cfg.aid, pos);
}

/* translate numbering in the WMM parameter IE to the mac80211 notation */
static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac)
{
	switch (ac) {
	default:
		WARN_ON_ONCE(1);
		fallthrough;
	case 0:
		return IEEE80211_AC_BE;
	case 1:
		return IEEE80211_AC_BK;
	case 2:
		return IEEE80211_AC_VI;
	case 3:
		return IEEE80211_AC_VO;
	}
}

static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci)
{
	u8 ret;

	ret = aifsn & 0x0f;
	if (acm)
		ret |= 0x10;
	ret |= (aci << 5) & 0x60;
	return ret;
}

static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max)
{
	return ((ilog2(cw_min + 1) << 0x0) & 0x0f) |
	       ((ilog2(cw_max + 1) << 0x4) & 0xf0);
}

static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata,
					    struct sk_buff *skb)
{
	struct ieee80211_wmm_param_ie *wmm;
	struct ieee80211_tx_queue_params *txq;
	int i;

	wmm = skb_put_zero(skb, sizeof(*wmm));

	wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
	wmm->len = sizeof(*wmm) - 2;

	wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
	wmm->oui[1] = 0x50;
	wmm->oui[2] = 0xf2;
	wmm->oui_type = 2; /* WME */
	wmm->oui_subtype = 1; /* WME param */
	wmm->version = 1; /* WME ver */
	wmm->qos_info = 0; /* U-APSD not in use */

	/*
	 * Use the EDCA parameters defined for the BSS, or default if the AP
	 * doesn't support it, as mandated by 802.11-2012 section 10.22.4
	 */
	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
		txq = &sdata->deflink.tx_conf[ieee80211_ac_from_wmm(i)];
		wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs,
							       txq->acm, i);
		wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max);
		wmm->ac[i].txop_limit = cpu_to_le16(txq->txop);
	}
}

static void
ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata,
				   struct sta_info *sta)
{
	/* IEEE802.11ac-2013 Table E-4 */
	static const u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 };
	struct cfg80211_chan_def uc = sta->tdls_chandef;
	enum nl80211_chan_width max_width =
		ieee80211_sta_cap_chan_bw(&sta->deflink);
	int i;

	/* only support upgrading non-narrow channels up to 80Mhz */
	if (max_width == NL80211_CHAN_WIDTH_5 ||
	    max_width == NL80211_CHAN_WIDTH_10)
		return;

	if (max_width > NL80211_CHAN_WIDTH_80)
		max_width = NL80211_CHAN_WIDTH_80;

	if (uc.width >= max_width)
		return;
	/*
	 * Channel usage constrains in the IEEE802.11ac-2013 specification only
	 * allow expanding a 20MHz channel to 80MHz in a single way. In
	 * addition, there are no 40MHz allowed channels that are not part of
	 * the allowed 80MHz range in the 5GHz spectrum (the relevant one here).
	 */
	for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++)
		if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) {
			uc.center_freq1 = centers_80mhz[i];
			uc.center_freq2 = 0;
			uc.width = NL80211_CHAN_WIDTH_80;
			break;
		}

	if (!uc.center_freq1)
		return;

	/* proceed to downgrade the chandef until usable or the same as AP BW */
	while (uc.width > max_width ||
	       (uc.width > sta->tdls_chandef.width &&
		!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &uc,
					       sdata->wdev.iftype)))
		ieee80211_chandef_downgrade(&uc, NULL);

	if (!cfg80211_chandef_identical(&uc, &sta->tdls_chandef)) {
		tdls_dbg(sdata, "TDLS ch width upgraded %d -> %d\n",
			 sta->tdls_chandef.width, uc.width);

		/*
		 * the station is not yet authorized when BW upgrade is done,
		 * locking is not required
		 */
		sta->tdls_chandef = uc;
	}
}

static void
ieee80211_tdls_add_setup_start_ies(struct ieee80211_link_data *link,
				   struct sk_buff *skb, const u8 *peer,
				   u8 action_code, bool initiator,
				   const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_supported_band *sband;
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_sta_ht_cap ht_cap;
	struct ieee80211_sta_vht_cap vht_cap;
	const struct ieee80211_sta_he_cap *he_cap;
	const struct ieee80211_sta_eht_cap *eht_cap;
	struct sta_info *sta = NULL;
	size_t offset = 0, noffset;
	u8 *pos;

	sband = ieee80211_get_link_sband(link);
	if (WARN_ON_ONCE(!sband))
		return;

	ieee80211_put_srates_elem(skb, sband, 0, 0, WLAN_EID_SUPP_RATES);
	ieee80211_put_srates_elem(skb, sband, 0, 0, WLAN_EID_EXT_SUPP_RATES);
	ieee80211_tdls_add_supp_channels(sdata, skb);

	/* add any custom IEs that go before Extended Capabilities */
	if (extra_ies_len) {
		static const u8 before_ext_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ext_cap,
					     ARRAY_SIZE(before_ext_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	ieee80211_tdls_add_ext_capab(link, skb);

	/* add the QoS element if we support it */
	if (local->hw.queues >= IEEE80211_NUM_ACS &&
	    action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
		ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */

	/* add any custom IEs that go before HT capabilities */
	if (extra_ies_len) {
		static const u8 before_ht_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ht_cap,
					     ARRAY_SIZE(before_ht_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* we should have the peer STA if we're already responding */
	if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
		sta = sta_info_get(sdata, peer);
		if (WARN_ON_ONCE(!sta))
			return;

		sta->tdls_chandef = link->conf->chanreq.oper;
	}

	ieee80211_tdls_add_oper_classes(link, skb);

	/*
	 * with TDLS we can switch channels, and HT-caps are not necessarily
	 * the same on all bands. The specification limits the setup to a
	 * single HT-cap, so use the current band for now.
	 */
	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));

	if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
	    ht_cap.ht_supported) {
		ieee80211_apply_htcap_overrides(sdata, &ht_cap);

		/* disable SMPS in TDLS initiator */
		ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
				<< IEEE80211_HT_CAP_SM_PS_SHIFT;

		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
		ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
	} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
		   ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
		/* the peer caps are already intersected with our own */
		memcpy(&ht_cap, &sta->sta.deflink.ht_cap, sizeof(ht_cap));

		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
		ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
	}

	if (ht_cap.ht_supported &&
	    (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
		ieee80211_tdls_add_bss_coex_ie(skb);

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* add any custom IEs that go before VHT capabilities */
	if (extra_ies_len) {
		static const u8 before_vht_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_MULTI_BAND,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_vht_cap,
					     ARRAY_SIZE(before_vht_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* add AID if VHT, HE or EHT capabilities supported */
	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
	he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
	eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
	if ((vht_cap.vht_supported || he_cap || eht_cap) &&
	    (action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_TDLS_SETUP_RESPONSE))
		ieee80211_tdls_add_aid(sdata, skb);

	/* build the VHT-cap similarly to the HT-cap */
	if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
	    vht_cap.vht_supported) {
		ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);

		pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
		ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
	} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
		   vht_cap.vht_supported && sta->sta.deflink.vht_cap.vht_supported) {
		/* the peer caps are already intersected with our own */
		memcpy(&vht_cap, &sta->sta.deflink.vht_cap, sizeof(vht_cap));

		pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
		ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);

		/*
		 * if both peers support WIDER_BW, we can expand the chandef to
		 * a wider compatible one, up to 80MHz
		 */
		if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
	}

	/* add any custom IEs that go before HE capabilities */
	if (extra_ies_len) {
		static const u8 before_he_cap[] = {
			WLAN_EID_EXTENSION,
			WLAN_EID_EXT_FILS_REQ_PARAMS,
			WLAN_EID_AP_CSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_he_cap,
					     ARRAY_SIZE(before_he_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* build the HE-cap from sband */
	if (action_code == WLAN_TDLS_SETUP_REQUEST ||
	    action_code == WLAN_TDLS_SETUP_RESPONSE ||
	    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
		ieee80211_put_he_cap(skb, sdata, sband, NULL);

		/* Build HE 6Ghz capa IE from sband */
		if (sband->band == NL80211_BAND_6GHZ)
			ieee80211_put_he_6ghz_cap(skb, sdata, link->smps_mode);
	}

	/* add any custom IEs that go before EHT capabilities */
	if (extra_ies_len) {
		static const u8 before_he_cap[] = {
			WLAN_EID_EXTENSION,
			WLAN_EID_EXT_FILS_REQ_PARAMS,
			WLAN_EID_AP_CSN,
		};

		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_he_cap,
					     ARRAY_SIZE(before_he_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* build the EHT-cap from sband */
	if (action_code == WLAN_TDLS_SETUP_REQUEST ||
	    action_code == WLAN_TDLS_SETUP_RESPONSE ||
	    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
		ieee80211_put_eht_cap(skb, sdata, sband, NULL);

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}

}

static void
ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
				 struct sk_buff *skb, const u8 *peer,
				 bool initiator, const u8 *extra_ies,
				 size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_local *local = sdata->local;
	size_t offset = 0, noffset;
	struct sta_info *sta, *ap_sta;
	struct ieee80211_supported_band *sband;
	u8 *pos;

	sband = ieee80211_get_link_sband(link);
	if (WARN_ON_ONCE(!sband))
		return;

	sta = sta_info_get(sdata, peer);
	ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);

	if (WARN_ON_ONCE(!sta || !ap_sta))
		return;

	sta->tdls_chandef = link->conf->chanreq.oper;

	/* add any custom IEs that go before the QoS IE */
	if (extra_ies_len) {
		static const u8 before_qos[] = {
			WLAN_EID_RSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_qos,
					     ARRAY_SIZE(before_qos),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* add the QoS param IE if both the peer and we support it */
	if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
		ieee80211_tdls_add_wmm_param_ie(sdata, skb);

	/* add any custom IEs that go before HT operation */
	if (extra_ies_len) {
		static const u8 before_ht_op[] = {
			WLAN_EID_RSN,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ht_op,
					     ARRAY_SIZE(before_ht_op),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/*
	 * if HT support is only added in TDLS, we need an HT-operation IE.
	 * add the IE as required by IEEE802.11-2012 9.23.3.2.
	 */
	if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
		u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
			   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
			   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;

		pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
		ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
					   &link->conf->chanreq.oper, prot,
					   true);
	}

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* only include VHT-operation if not on the 2.4GHz band */
	if (sband->band != NL80211_BAND_2GHZ &&
	    sta->sta.deflink.vht_cap.vht_supported) {
		/*
		 * if both peers support WIDER_BW, we can expand the chandef to
		 * a wider compatible one, up to 80MHz
		 */
		if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);

		pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
		ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
					    &sta->tdls_chandef);
	}

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}
}

static void
ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_link_data *link,
				       struct sk_buff *skb, const u8 *peer,
				       bool initiator, const u8 *extra_ies,
				       size_t extra_ies_len, u8 oper_class,
				       struct cfg80211_chan_def *chandef)
{
	struct ieee80211_tdls_data *tf;
	size_t offset = 0, noffset;

	if (WARN_ON_ONCE(!chandef))
		return;

	tf = (void *)skb->data;
	tf->u.chan_switch_req.target_channel =
		ieee80211_frequency_to_channel(chandef->chan->center_freq);
	tf->u.chan_switch_req.oper_class = oper_class;

	if (extra_ies_len) {
		static const u8 before_lnkie[] = {
			WLAN_EID_SECONDARY_CHANNEL_OFFSET,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_lnkie,
					     ARRAY_SIZE(before_lnkie),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}
}

static void
ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_link_data *link,
					struct sk_buff *skb, const u8 *peer,
					u16 status_code, bool initiator,
					const u8 *extra_ies,
					size_t extra_ies_len)
{
	if (status_code == 0)
		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	if (extra_ies_len)
		skb_put_data(skb, extra_ies, extra_ies_len);
}

static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
				   struct sk_buff *skb, const u8 *peer,
				   u8 action_code, u16 status_code,
				   bool initiator, const u8 *extra_ies,
				   size_t extra_ies_len, u8 oper_class,
				   struct cfg80211_chan_def *chandef)
{
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		if (status_code == 0)
			ieee80211_tdls_add_setup_start_ies(link,
							   skb, peer,
							   action_code,
							   initiator,
							   extra_ies,
							   extra_ies_len);
		break;
	case WLAN_TDLS_SETUP_CONFIRM:
		if (status_code == 0)
			ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
							 initiator, extra_ies,
							 extra_ies_len);
		break;
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_DISCOVERY_REQUEST:
		if (extra_ies_len)
			skb_put_data(skb, extra_ies, extra_ies_len);
		if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
			ieee80211_tdls_add_link_ie(link, skb,
						   peer, initiator);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		ieee80211_tdls_add_chan_switch_req_ies(link, skb, peer,
						       initiator, extra_ies,
						       extra_ies_len,
						       oper_class, chandef);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ieee80211_tdls_add_chan_switch_resp_ies(link, skb, peer,
							status_code,
							initiator, extra_ies,
							extra_ies_len);
		break;
	}

}

static int
ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
			       struct ieee80211_link_data *link,
			       const u8 *peer, u8 action_code, u8 dialog_token,
			       u16 status_code, struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_tdls_data *tf;

	tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u));

	memcpy(tf->da, peer, ETH_ALEN);
	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;

	/* network header is after the ethernet header */
	skb_set_network_header(skb, ETH_HLEN);

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_REQUEST;

		skb_put(skb, sizeof(tf->u.setup_req));
		tf->u.setup_req.dialog_token = dialog_token;
		tf->u.setup_req.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	case WLAN_TDLS_SETUP_RESPONSE:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_RESPONSE;

		skb_put(skb, sizeof(tf->u.setup_resp));
		tf->u.setup_resp.status_code = cpu_to_le16(status_code);
		tf->u.setup_resp.dialog_token = dialog_token;
		tf->u.setup_resp.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	case WLAN_TDLS_SETUP_CONFIRM:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;

		skb_put(skb, sizeof(tf->u.setup_cfm));
		tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
		tf->u.setup_cfm.dialog_token = dialog_token;
		break;
	case WLAN_TDLS_TEARDOWN:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_TEARDOWN;

		skb_put(skb, sizeof(tf->u.teardown));
		tf->u.teardown.reason_code = cpu_to_le16(status_code);
		break;
	case WLAN_TDLS_DISCOVERY_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;

		skb_put(skb, sizeof(tf->u.discover_req));
		tf->u.discover_req.dialog_token = dialog_token;
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;

		skb_put(skb, sizeof(tf->u.chan_switch_req));
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;

		skb_put(skb, sizeof(tf->u.chan_switch_resp));
		tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int
ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
			   const u8 *peer, struct ieee80211_link_data *link,
			   u8 action_code, u8 dialog_token,
			   u16 status_code, struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_mgmt *mgmt;

	mgmt = skb_put_zero(skb, 24);
	memcpy(mgmt->da, peer, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, link->u.mgd.bssid, ETH_ALEN);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_ACTION);

	switch (action_code) {
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp));
		mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
		mgmt->u.action.u.tdls_discover_resp.action_code =
			WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
		mgmt->u.action.u.tdls_discover_resp.dialog_token =
			dialog_token;
		mgmt->u.action.u.tdls_discover_resp.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static struct sk_buff *
ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
				      const u8 *peer, int link_id,
				      u8 action_code, u8 dialog_token,
				      u16 status_code, bool initiator,
				      const u8 *extra_ies, size_t extra_ies_len,
				      u8 oper_class,
				      struct cfg80211_chan_def *chandef)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	int ret;
	struct ieee80211_link_data *link;

	link_id = link_id >= 0 ? link_id : 0;
	rcu_read_lock();
	link = rcu_dereference(sdata->link[link_id]);
	if (WARN_ON(!link))
		goto unlock;

	skb = netdev_alloc_skb(sdata->dev,
			       local->hw.extra_tx_headroom +
			       max(sizeof(struct ieee80211_mgmt),
				   sizeof(struct ieee80211_tdls_data)) +
			       50 + /* supported rates */
			       10 + /* ext capab */
			       26 + /* max(WMM-info, WMM-param) */
			       2 + max(sizeof(struct ieee80211_ht_cap),
				       sizeof(struct ieee80211_ht_operation)) +
			       2 + max(sizeof(struct ieee80211_vht_cap),
				       sizeof(struct ieee80211_vht_operation)) +
			       2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
				       sizeof(struct ieee80211_he_mcs_nss_supp) +
				       IEEE80211_HE_PPE_THRES_MAX_LEN +
			       2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
			       2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
				       sizeof(struct ieee80211_eht_mcs_nss_supp) +
				       IEEE80211_EHT_PPE_THRES_MAX_LEN +
			       50 + /* supported channels */
			       3 + /* 40/20 BSS coex */
			       4 + /* AID */
			       4 + /* oper classes */
			       extra_ies_len +
			       sizeof(struct ieee80211_tdls_lnkie));
	if (!skb)
		goto unlock;

	skb_reserve(skb, local->hw.extra_tx_headroom);

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_DISCOVERY_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
						     sdata->dev, link, peer,
						     action_code, dialog_token,
						     status_code, skb);
		break;
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
						 peer, link, action_code,
						 dialog_token, status_code,
						 skb);
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	if (ret < 0)
		goto fail;

	ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
			       initiator, extra_ies, extra_ies_len, oper_class,
			       chandef);
	rcu_read_unlock();
	return skb;

fail:
	dev_kfree_skb(skb);
unlock:
	rcu_read_unlock();
	return NULL;
}

static int
ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
				const u8 *peer, int link_id,
				u8 action_code, u8 dialog_token,
				u16 status_code, u32 peer_capability,
				bool initiator, const u8 *extra_ies,
				size_t extra_ies_len, u8 oper_class,
				struct cfg80211_chan_def *chandef)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct sk_buff *skb = NULL;
	struct sta_info *sta;
	u32 flags = 0;
	int ret = 0;

	rcu_read_lock();
	sta = sta_info_get(sdata, peer);

	/* infer the initiator if we can, to support old userspace */
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
		if (sta) {
			set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
			sta->sta.tdls_initiator = false;
		}
		fallthrough;
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_TDLS_DISCOVERY_REQUEST:
		initiator = true;
		break;
	case WLAN_TDLS_SETUP_RESPONSE:
		/*
		 * In some testing scenarios, we send a request and response.
		 * Make the last packet sent take effect for the initiator
		 * value.
		 */
		if (sta) {
			clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
			sta->sta.tdls_initiator = true;
		}
		fallthrough;
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		initiator = false;
		break;
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		/* any value is ok */
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
		initiator = true;

	rcu_read_unlock();
	if (ret < 0)
		goto fail;

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
						    link_id, action_code,
						    dialog_token, status_code,
						    initiator, extra_ies,
						    extra_ies_len, oper_class,
						    chandef);
	if (!skb) {
		ret = -EINVAL;
		goto fail;
	}

	if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
		ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
		return 0;
	}

	/*
	 * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
	 * we should default to AC_VI.
	 */
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
		skb->priority = 256 + 2;
		break;
	default:
		skb->priority = 256 + 5;
		break;
	}

	/*
	 * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress.
	 * Later, if no ACK is returned from peer, we will re-send the teardown
	 * packet through the AP.
	 */
	if ((action_code == WLAN_TDLS_TEARDOWN) &&
	    ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
		bool try_resend; /* Should we keep skb for possible resend */

		/* If not sending directly to peer - no point in keeping skb */
		rcu_read_lock();
		sta = sta_info_get(sdata, peer);
		try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
		rcu_read_unlock();

		spin_lock_bh(&sdata->u.mgd.teardown_lock);
		if (try_resend && !sdata->u.mgd.teardown_skb) {
			/* Mark it as requiring TX status callback  */
			flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
				 IEEE80211_TX_INTFL_MLME_CONN_TX;

			/*
			 * skb is copied since mac80211 will later set
			 * properties that might not be the same as the AP,
			 * such as encryption, QoS, addresses, etc.
			 *
			 * No problem if skb_copy() fails, so no need to check.
			 */
			sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC);
			sdata->u.mgd.orig_teardown_skb = skb;
		}
		spin_unlock_bh(&sdata->u.mgd.teardown_lock);
	}

	/* disable bottom halves when entering the Tx path */
	local_bh_disable();
	__ieee80211_subif_start_xmit(skb, dev, flags,
				     IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
	local_bh_enable();

	return ret;

fail:
	dev_kfree_skb(skb);
	return ret;
}

static int
ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
			  const u8 *peer, int link_id,
			  u8 action_code, u8 dialog_token,
			  u16 status_code, u32 peer_capability, bool initiator,
			  const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	enum ieee80211_smps_mode smps_mode =
		sdata->deflink.u.mgd.driver_smps_mode;
	int ret;

	/* don't support setup with forced SMPS mode that's not off */
	if (smps_mode != IEEE80211_SMPS_AUTOMATIC &&
	    smps_mode != IEEE80211_SMPS_OFF) {
		tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n",
			 smps_mode);
		return -EOPNOTSUPP;
	}

	lockdep_assert_wiphy(local->hw.wiphy);

	/* we don't support concurrent TDLS peer setups */
	if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) &&
	    !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
		ret = -EBUSY;
		goto out_unlock;
	}

	/*
	 * make sure we have a STA representing the peer so we drop or buffer
	 * non-TDLS-setup frames to the peer. We can't send other packets
	 * during setup through the AP path.
	 * Allow error packets to be sent - sometimes we don't even add a STA
	 * before failing the setup.
	 */
	if (status_code == 0) {
		rcu_read_lock();
		if (!sta_info_get(sdata, peer)) {
			rcu_read_unlock();
			ret = -ENOLINK;
			goto out_unlock;
		}
		rcu_read_unlock();
	}

	ieee80211_flush_queues(local, sdata, false);
	memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN);

	/* we cannot take the mutex while preparing the setup packet */
	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
					      link_id, action_code,
					      dialog_token, status_code,
					      peer_capability, initiator,
					      extra_ies, extra_ies_len, 0,
					      NULL);
	if (ret < 0) {
		eth_zero_addr(sdata->u.mgd.tdls_peer);
		return ret;
	}

	wiphy_delayed_work_queue(sdata->local->hw.wiphy,
				 &sdata->u.mgd.tdls_peer_del_work,
				 TDLS_PEER_SETUP_TIMEOUT);
	return 0;

out_unlock:
	return ret;
}

static int
ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
			     const u8 *peer, int link_id,
			     u8 action_code, u8 dialog_token,
			     u16 status_code, u32 peer_capability,
			     bool initiator, const u8 *extra_ies,
			     size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;
	int ret;

	/*
	 * No packets can be transmitted to the peer via the AP during setup -
	 * the STA is set as a TDLS peer, but is not authorized.
	 * During teardown, we prevent direct transmissions by stopping the
	 * queues and flushing all direct packets.
	 */
	ieee80211_stop_vif_queues(local, sdata,
				  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);
	ieee80211_flush_queues(local, sdata, false);

	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
					      link_id, action_code,
					      dialog_token, status_code,
					      peer_capability, initiator,
					      extra_ies, extra_ies_len, 0,
					      NULL);
	if (ret < 0)
		sdata_err(sdata, "Failed sending TDLS teardown packet %d\n",
			  ret);

	/*
	 * Remove the STA AUTH flag to force further traffic through the AP. If
	 * the STA was unreachable, it was already removed.
	 */
	rcu_read_lock();
	sta = sta_info_get(sdata, peer);
	if (sta)
		clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
	rcu_read_unlock();

	ieee80211_wake_vif_queues(local, sdata,
				  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);

	return 0;
}

int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
			const u8 *peer, int link_id,
			u8 action_code, u8 dialog_token, u16 status_code,
			u32 peer_capability, bool initiator,
			const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	int ret;

	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
		return -EOPNOTSUPP;

	/* make sure we are in managed mode, and associated */
	if (sdata->vif.type != NL80211_IFTYPE_STATION ||
	    !sdata->u.mgd.associated)
		return -EINVAL;

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
						link_id, action_code,
						dialog_token, status_code,
						peer_capability, initiator,
						extra_ies, extra_ies_len);
		break;
	case WLAN_TDLS_TEARDOWN:
		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
						   action_code, dialog_token,
						   status_code,
						   peer_capability, initiator,
						   extra_ies, extra_ies_len);
		break;
	case WLAN_TDLS_DISCOVERY_REQUEST:
		/*
		 * Protect the discovery so we can hear the TDLS discovery
		 * response frame. It is transmitted directly and not buffered
		 * by the AP.
		 */
		drv_mgd_protect_tdls_discover(sdata->local, sdata, link_id);
		fallthrough;
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		/* no special handling */
		ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
						      link_id, action_code,
						      dialog_token,
						      status_code,
						      peer_capability,
						      initiator, extra_ies,
						      extra_ies_len, 0, NULL);
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	tdls_dbg(sdata, "TDLS mgmt action %d peer %pM link_id %d status %d\n",
		 action_code, peer, link_id, ret);
	return ret;
}

static void iee80211_tdls_recalc_chanctx(struct ieee80211_sub_if_data *sdata,
					 struct sta_info *sta)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_chanctx_conf *conf;
	struct ieee80211_chanctx *ctx;
	enum nl80211_chan_width width;
	struct ieee80211_supported_band *sband;

	lockdep_assert_wiphy(local->hw.wiphy);

	conf = rcu_dereference_protected(sdata->vif.bss_conf.chanctx_conf,
					 lockdep_is_held(&local->hw.wiphy->mtx));
	if (conf) {
		width = conf->def.width;
		sband = local->hw.wiphy->bands[conf->def.chan->band];
		ctx = container_of(conf, struct ieee80211_chanctx, conf);
		ieee80211_recalc_chanctx_chantype(local, ctx);

		/* if width changed and a peer is given, update its BW */
		if (width != conf->def.width && sta &&
		    test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) {
			enum ieee80211_sta_rx_bandwidth bw;

			bw = ieee80211_chan_width_to_rx_bw(conf->def.width);
			bw = min(bw, ieee80211_sta_cap_rx_bw(&sta->deflink));
			if (bw != sta->sta.deflink.bandwidth) {
				sta->sta.deflink.bandwidth = bw;
				rate_control_rate_update(local, sband,
							 &sta->deflink,
							 IEEE80211_RC_BW_CHANGED);
				/*
				 * if a TDLS peer BW was updated, we need to
				 * recalc the chandef width again, to get the
				 * correct chanctx min_def
				 */
				ieee80211_recalc_chanctx_chantype(local, ctx);
			}
		}

	}
}

static int iee80211_tdls_have_ht_peers(struct ieee80211_sub_if_data *sdata)
{
	struct sta_info *sta;
	bool result = false;

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
		if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
		    !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
		    !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH) ||
		    !sta->sta.deflink.ht_cap.ht_supported)
			continue;
		result = true;
		break;
	}
	rcu_read_unlock();

	return result;
}

static void
iee80211_tdls_recalc_ht_protection(struct ieee80211_sub_if_data *sdata,
				   struct sta_info *sta)
{
	bool tdls_ht;
	u16 protection = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
			 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
			 IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
	u16 opmode;

	/* Nothing to do if the BSS connection uses (at least) HT */
	if (sdata->deflink.u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT)
		return;

	tdls_ht = (sta && sta->sta.deflink.ht_cap.ht_supported) ||
		  iee80211_tdls_have_ht_peers(sdata);

	opmode = sdata->vif.bss_conf.ht_operation_mode;

	if (tdls_ht)
		opmode |= protection;
	else
		opmode &= ~protection;

	if (opmode == sdata->vif.bss_conf.ht_operation_mode)
		return;

	sdata->vif.bss_conf.ht_operation_mode = opmode;
	ieee80211_link_info_change_notify(sdata, &sdata->deflink,
					  BSS_CHANGED_HT);
}

int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
			const u8 *peer, enum nl80211_tdls_operation oper)
{
	struct sta_info *sta;
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
		return -EOPNOTSUPP;

	if (sdata->vif.type != NL80211_IFTYPE_STATION || !sdata->vif.cfg.assoc)
		return -EINVAL;

	switch (oper) {
	case NL80211_TDLS_ENABLE_LINK:
	case NL80211_TDLS_DISABLE_LINK:
		break;
	case NL80211_TDLS_TEARDOWN:
	case NL80211_TDLS_SETUP:
	case NL80211_TDLS_DISCOVERY_REQ:
		/* We don't support in-driver setup/teardown/discovery */
		return -EOPNOTSUPP;
	}

	/* protect possible bss_conf changes and avoid concurrency in
	 * ieee80211_bss_info_change_notify()
	 */
	tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer);

	switch (oper) {
	case NL80211_TDLS_ENABLE_LINK:
		if (sdata->vif.bss_conf.csa_active) {
			tdls_dbg(sdata, "TDLS: disallow link during CSA\n");
			return -EBUSY;
		}

		sta = sta_info_get(sdata, peer);
		if (!sta || !sta->sta.tdls)
			return -ENOLINK;

		iee80211_tdls_recalc_chanctx(sdata, sta);
		iee80211_tdls_recalc_ht_protection(sdata, sta);

		set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);

		WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) ||
			     !ether_addr_equal(sdata->u.mgd.tdls_peer, peer));
		break;
	case NL80211_TDLS_DISABLE_LINK:
		/*
		 * The teardown message in ieee80211_tdls_mgmt_teardown() was
		 * created while the queues were stopped, so it might still be
		 * pending. Before flushing the queues we need to be sure the
		 * message is handled by the tasklet handling pending messages,
		 * otherwise we might start destroying the station before
		 * sending the teardown packet.
		 * Note that this only forces the tasklet to flush pendings -
		 * not to stop the tasklet from rescheduling itself.
		 */
		tasklet_kill(&local->tx_pending_tasklet);
		/* flush a potentially queued teardown packet */
		ieee80211_flush_queues(local, sdata, false);

		ret = sta_info_destroy_addr(sdata, peer);

		iee80211_tdls_recalc_ht_protection(sdata, NULL);

		iee80211_tdls_recalc_chanctx(sdata, NULL);
		if (ret)
			return ret;
		break;
	default:
		return -EOPNOTSUPP;
	}

	if (ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
		wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
					  &sdata->u.mgd.tdls_peer_del_work);
		eth_zero_addr(sdata->u.mgd.tdls_peer);
	}

	wiphy_work_queue(sdata->local->hw.wiphy,
			 &sdata->deflink.u.mgd.request_smps_work);

	return 0;
}

void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer,
				 enum nl80211_tdls_operation oper,
				 u16 reason_code, gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	if (vif->type != NL80211_IFTYPE_STATION || !vif->cfg.assoc) {
		sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n",
			  oper);
		return;
	}

	cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp);
}
EXPORT_SYMBOL(ieee80211_tdls_oper_request);

static void
iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout)
{
	struct ieee80211_ch_switch_timing *ch_sw;

	*buf++ = WLAN_EID_CHAN_SWITCH_TIMING;
	*buf++ = sizeof(struct ieee80211_ch_switch_timing);

	ch_sw = (void *)buf;
	ch_sw->switch_time = cpu_to_le16(switch_time);
	ch_sw->switch_timeout = cpu_to_le16(switch_timeout);
}

/* find switch timing IE in SKB ready for Tx */
static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb)
{
	struct ieee80211_tdls_data *tf;
	const u8 *ie_start;

	/*
	 * Get the offset for the new location of the switch timing IE.
	 * The SKB network header will now point to the "payload_type"
	 * element of the TDLS data frame struct.
	 */
	tf = container_of(skb->data + skb_network_offset(skb),
			  struct ieee80211_tdls_data, payload_type);
	ie_start = tf->u.chan_switch_req.variable;
	return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start,
				skb->len - (ie_start - skb->data));
}

static struct sk_buff *
ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class,
			      struct cfg80211_chan_def *chandef,
			      u32 *ch_sw_tm_ie_offset)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
		     2 + sizeof(struct ieee80211_ch_switch_timing)];
	int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing);
	u8 *pos = extra_ies;
	struct sk_buff *skb;
	int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;

	/*
	 * if chandef points to a wide channel add a Secondary-Channel
	 * Offset information element
	 */
	if (chandef->width == NL80211_CHAN_WIDTH_40) {
		struct ieee80211_sec_chan_offs_ie *sec_chan_ie;
		bool ht40plus;

		*pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
		*pos++ = sizeof(*sec_chan_ie);
		sec_chan_ie = (void *)pos;

		ht40plus = cfg80211_get_chandef_type(chandef) ==
							NL80211_CHAN_HT40PLUS;
		sec_chan_ie->sec_chan_offs = ht40plus ?
					     IEEE80211_HT_PARAM_CHA_SEC_ABOVE :
					     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
		pos += sizeof(*sec_chan_ie);

		extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
	}

	/* just set the values to 0, this is a template */
	iee80211_tdls_add_ch_switch_timing(pos, 0, 0);

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
					      link_id,
					      WLAN_TDLS_CHANNEL_SWITCH_REQUEST,
					      0, 0, !sta->sta.tdls_initiator,
					      extra_ies, extra_ies_len,
					      oper_class, chandef);
	if (!skb)
		return NULL;

	skb = ieee80211_build_data_template(sdata, skb, 0);
	if (IS_ERR(skb)) {
		tdls_dbg(sdata, "Failed building TDLS channel switch frame\n");
		return NULL;
	}

	if (ch_sw_tm_ie_offset) {
		const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);

		if (!tm_ie) {
			tdls_dbg(sdata, "No switch timing IE in TDLS switch\n");
			dev_kfree_skb_any(skb);
			return NULL;
		}

		*ch_sw_tm_ie_offset = tm_ie - skb->data;
	}

	tdls_dbg(sdata,
		 "TDLS channel switch request template for %pM ch %d width %d\n",
		 sta->sta.addr, chandef->chan->center_freq, chandef->width);
	return skb;
}

int
ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
			      const u8 *addr, u8 oper_class,
			      struct cfg80211_chan_def *chandef)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;
	struct sk_buff *skb = NULL;
	u32 ch_sw_tm_ie;
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (chandef->chan->freq_offset)
		/* this may work, but is untested */
		return -EOPNOTSUPP;

	sta = sta_info_get(sdata, addr);
	if (!sta) {
		tdls_dbg(sdata,
			 "Invalid TDLS peer %pM for channel switch request\n",
			 addr);
		ret = -ENOENT;
		goto out;
	}

	if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) {
		tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n",
			 addr);
		ret = -EOPNOTSUPP;
		goto out;
	}

	skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef,
					    &ch_sw_tm_ie);
	if (!skb) {
		ret = -ENOENT;
		goto out;
	}

	ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class,
				      chandef, skb, ch_sw_tm_ie);
	if (!ret)
		set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);

out:
	dev_kfree_skb_any(skb);
	return ret;
}

void
ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
				     struct net_device *dev,
				     const u8 *addr)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;

	lockdep_assert_wiphy(local->hw.wiphy);

	sta = sta_info_get(sdata, addr);
	if (!sta) {
		tdls_dbg(sdata,
			 "Invalid TDLS peer %pM for channel switch cancel\n",
			 addr);
		return;
	}

	if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
		tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n",
			 addr);
		return;
	}

	drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
	clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
}

static struct sk_buff *
ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta,
				   u32 *ch_sw_tm_ie_offset)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	struct sk_buff *skb;
	u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)];
	int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;

	/* initial timing are always zero in the template */
	iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0);

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
					link_id,
					WLAN_TDLS_CHANNEL_SWITCH_RESPONSE,
					0, 0, !sta->sta.tdls_initiator,
					extra_ies, sizeof(extra_ies), 0, NULL);
	if (!skb)
		return NULL;

	skb = ieee80211_build_data_template(sdata, skb, 0);
	if (IS_ERR(skb)) {
		tdls_dbg(sdata,
			 "Failed building TDLS channel switch resp frame\n");
		return NULL;
	}

	if (ch_sw_tm_ie_offset) {
		const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);

		if (!tm_ie) {
			tdls_dbg(sdata,
				 "No switch timing IE in TDLS switch resp\n");
			dev_kfree_skb_any(skb);
			return NULL;
		}

		*ch_sw_tm_ie_offset = tm_ie - skb->data;
	}

	tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n",
		 sta->sta.addr);
	return skb;
}

static int
ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata,
					   struct sk_buff *skb)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee802_11_elems *elems = NULL;
	struct sta_info *sta;
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	bool local_initiator;
	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
	int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable);
	struct ieee80211_tdls_ch_sw_params params = {};
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
	params.timestamp = rx_status->device_timestamp;

	if (skb->len < baselen) {
		tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n",
			 skb->len);
		return -EINVAL;
	}

	sta = sta_info_get(sdata, tf->sa);
	if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
		tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
			 tf->sa);
		ret = -EINVAL;
		goto out;
	}

	params.sta = &sta->sta;
	params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code);
	if (params.status != 0) {
		ret = 0;
		goto call_drv;
	}

	elems = ieee802_11_parse_elems(tf->u.chan_switch_resp.variable,
				       skb->len - baselen,
				       IEEE80211_FTYPE_MGMT |
				       IEEE80211_STYPE_ACTION,
				       NULL);
	if (!elems) {
		ret = -ENOMEM;
		goto out;
	}

	if (elems->parse_error) {
		tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n");
		ret = -EINVAL;
		goto out;
	}

	if (!elems->ch_sw_timing || !elems->lnk_id) {
		tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n");
		ret = -EINVAL;
		goto out;
	}

	/* validate the initiator is set correctly */
	local_initiator =
		!memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
	if (local_initiator == sta->sta.tdls_initiator) {
		tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
		ret = -EINVAL;
		goto out;
	}

	params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time);
	params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout);

	params.tmpl_skb =
		ieee80211_tdls_ch_sw_resp_tmpl_get(sta, &params.ch_sw_tm_ie);
	if (!params.tmpl_skb) {
		ret = -ENOENT;
		goto out;
	}

	ret = 0;
call_drv:
	drv_tdls_recv_channel_switch(sdata->local, sdata, &params);

	tdls_dbg(sdata,
		 "TDLS channel switch response received from %pM status %d\n",
		 tf->sa, params.status);

out:
	dev_kfree_skb_any(params.tmpl_skb);
	kfree(elems);
	return ret;
}

static int
ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
					  struct sk_buff *skb)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee802_11_elems *elems;
	struct cfg80211_chan_def chandef;
	struct ieee80211_channel *chan;
	enum nl80211_channel_type chan_type;
	int freq;
	u8 target_channel, oper_class;
	bool local_initiator;
	struct sta_info *sta;
	enum nl80211_band band;
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
	int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable);
	struct ieee80211_tdls_ch_sw_params params = {};
	int ret = 0;

	lockdep_assert_wiphy(local->hw.wiphy);

	params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
	params.timestamp = rx_status->device_timestamp;

	if (skb->len < baselen) {
		tdls_dbg(sdata, "TDLS channel switch req too short: %d\n",
			 skb->len);
		return -EINVAL;
	}

	target_channel = tf->u.chan_switch_req.target_channel;
	oper_class = tf->u.chan_switch_req.oper_class;

	/*
	 * We can't easily infer the channel band. The operating class is
	 * ambiguous - there are multiple tables (US/Europe/JP/Global). The
	 * solution here is to treat channels with number >14 as 5GHz ones,
	 * and specifically check for the (oper_class, channel) combinations
	 * where this doesn't hold. These are thankfully unique according to
	 * IEEE802.11-2012.
	 * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as
	 * valid here.
	 */
	if ((oper_class == 112 || oper_class == 2 || oper_class == 3 ||
	     oper_class == 4 || oper_class == 5 || oper_class == 6) &&
	     target_channel < 14)
		band = NL80211_BAND_5GHZ;
	else
		band = target_channel < 14 ? NL80211_BAND_2GHZ :
					     NL80211_BAND_5GHZ;

	freq = ieee80211_channel_to_frequency(target_channel, band);
	if (freq == 0) {
		tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n",
			 target_channel);
		return -EINVAL;
	}

	chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
	if (!chan) {
		tdls_dbg(sdata,
			 "Unsupported channel for TDLS chan switch: %d\n",
			 target_channel);
		return -EINVAL;
	}

	elems = ieee802_11_parse_elems(tf->u.chan_switch_req.variable,
				       skb->len - baselen,
				       IEEE80211_FTYPE_MGMT |
				       IEEE80211_STYPE_ACTION,
				       NULL);
	if (!elems)
		return -ENOMEM;

	if (elems->parse_error) {
		tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n");
		ret = -EINVAL;
		goto free;
	}

	if (!elems->ch_sw_timing || !elems->lnk_id) {
		tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n");
		ret = -EINVAL;
		goto free;
	}

	if (!elems->sec_chan_offs) {
		chan_type = NL80211_CHAN_HT20;
	} else {
		switch (elems->sec_chan_offs->sec_chan_offs) {
		case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
			chan_type = NL80211_CHAN_HT40PLUS;
			break;
		case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
			chan_type = NL80211_CHAN_HT40MINUS;
			break;
		default:
			chan_type = NL80211_CHAN_HT20;
			break;
		}
	}

	cfg80211_chandef_create(&chandef, chan, chan_type);

	/* we will be active on the TDLS link */
	if (!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &chandef,
					   sdata->wdev.iftype)) {
		tdls_dbg(sdata, "TDLS chan switch to forbidden channel\n");
		ret = -EINVAL;
		goto free;
	}

	sta = sta_info_get(sdata, tf->sa);
	if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
		tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
			 tf->sa);
		ret = -EINVAL;
		goto out;
	}

	params.sta = &sta->sta;

	/* validate the initiator is set correctly */
	local_initiator =
		!memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
	if (local_initiator == sta->sta.tdls_initiator) {
		tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
		ret = -EINVAL;
		goto out;
	}

	/* peer should have known better */
	if (!sta->sta.deflink.ht_cap.ht_supported && elems->sec_chan_offs &&
	    elems->sec_chan_offs->sec_chan_offs) {
		tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n");
		ret = -EOPNOTSUPP;
		goto out;
	}

	params.chandef = &chandef;
	params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time);
	params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout);

	params.tmpl_skb =
		ieee80211_tdls_ch_sw_resp_tmpl_get(sta,
						   &params.ch_sw_tm_ie);
	if (!params.tmpl_skb) {
		ret = -ENOENT;
		goto out;
	}

	drv_tdls_recv_channel_switch(sdata->local, sdata, &params);

	tdls_dbg(sdata,
		 "TDLS ch switch request received from %pM ch %d width %d\n",
		 tf->sa, params.chandef->chan->center_freq,
		 params.chandef->width);
out:
	dev_kfree_skb_any(params.tmpl_skb);
free:
	kfree(elems);
	return ret;
}

void
ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
				      struct sk_buff *skb)
{
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	struct wiphy *wiphy = sdata->local->hw.wiphy;

	lockdep_assert_wiphy(wiphy);

	/* make sure the driver supports it */
	if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
		return;

	/* we want to access the entire packet */
	if (skb_linearize(skb))
		return;
	/*
	 * The packet/size was already validated by mac80211 Rx path, only look
	 * at the action type.
	 */
	switch (tf->action_code) {
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		ieee80211_process_tdls_channel_switch_req(sdata, skb);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ieee80211_process_tdls_channel_switch_resp(sdata, skb);
		break;
	default:
		WARN_ON_ONCE(1);
		return;
	}
}

void ieee80211_teardown_tdls_peers(struct ieee80211_link_data *link)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct sta_info *sta;
	u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
		if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
		    !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
			continue;

		if (sta->deflink.link_id != link->link_id)
			continue;

		ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr,
					    NL80211_TDLS_TEARDOWN, reason,
					    GFP_ATOMIC);
	}
	rcu_read_unlock();
}

void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata,
				      const u8 *peer, u16 reason)
{
	struct ieee80211_sta *sta;

	rcu_read_lock();
	sta = ieee80211_find_sta(&sdata->vif, peer);
	if (!sta || !sta->tdls) {
		rcu_read_unlock();
		return;
	}
	rcu_read_unlock();

	tdls_dbg(sdata, "disconnected from TDLS peer %pM (Reason: %u=%s)\n",
		 peer, reason,
		 ieee80211_get_reason_code_string(reason));

	ieee80211_tdls_oper_request(&sdata->vif, peer,
				    NL80211_TDLS_TEARDOWN,
				    WLAN_REASON_TDLS_TEARDOWN_UNREACHABLE,
				    GFP_ATOMIC);
}
]

gemini-3-flash-preview

							input: 66575
							output: 34
							thoughts: 578
						

**Investigating a `WARN_ON_ONCE` in TDLS Channel Switching**

Okay, I'm taking a look at some `WARN_ON_ONCE(1)` calls within the `net/mac80211/tdls.c` module. I've spotted them in three locations: `ieee80211_ac_from_wmm` (line 211), `ieee80211_tdls_oper` (line 783), and `ieee80211_process_tdls_channel_switch` (line 1172). Let's dig into that last one, `ieee80211_process_tdls_channel_switch`.

From the code, it seems like this function handles received TDLS channel switch frames. The key is in the `switch` statement based on `tf->action_code`. It calls different handlers depending on whether the frame is a request or a response. The `WARN_ON_ONCE(1)` is triggered if the `action_code` is *neither* `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` nor `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE`. That seems like a pretty clear indication of an unexpected frame type. This could signify an error in the TDLS frame processing, potentially a malformed frame, an unsupported action code, or something amiss in the MAC protocol state.

My next step is to figure out the call chain – where is `ieee80211_process_tdls_channel_switch` actually invoked? Understanding the context will give me a clearer picture of the possible failure points and any potential race conditions. Let me start searching for callers...

map[Name:ieee80211_process_tdls_channel_switch]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_iface_work SourceFile:net/mac80211/iface.c SourceLine:1800]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 67647
							output: 54
							thoughts: 27
						

Here's my attempt at summarizing the thought process, tailored for an expert audience:

**Diving into the Interface Code**

Okay, time to get my hands dirty. I need to refresh my memory on how this specific interface is handled within the mac80211 framework. I'm going to jump straight into the code, specifically `net/mac80211/iface.c`. I recall that file contains the core interface handling logic, and my hunch is whatever I'm troubleshooting is likely going to involve some manipulation that happens there. I'm going to start with line 1800. That's a reasonable starting point for whatever I'm chasing after. I hope I don't have to trace too far. I should be able to get this sorted quickly.

map[ContextFile:net/mac80211/iface.c IncludeLines:true Name:ieee80211_iface_work]

map[SourceCode:1779:	static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1780:	{
1781:		struct ieee80211_sub_if_data *sdata =
1782:			container_of(work, struct ieee80211_sub_if_data, work);
1783:		struct ieee80211_local *local = sdata->local;
1784:		struct sk_buff *skb;
1785:	
1786:		if (!ieee80211_sdata_running(sdata))
1787:			return;
1788:	
1789:		if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1790:			return;
1791:	
1792:		if (!ieee80211_can_run_worker(local))
1793:			return;
1794:	
1795:		/* first process frames */
1796:		while ((skb = skb_dequeue(&sdata->skb_queue))) {
1797:			kcov_remote_start_common(skb_get_kcov_handle(skb));
1798:	
1799:			if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1800:				ieee80211_process_tdls_channel_switch(sdata, skb);
1801:			else
1802:				ieee80211_iface_process_skb(local, sdata, skb);
1803:	
1804:			consume_skb(skb);
1805:			kcov_remote_stop();
1806:		}
1807:	
1808:		/* process status queue */
1809:		while ((skb = skb_dequeue(&sdata->status_queue))) {
1810:			kcov_remote_start_common(skb_get_kcov_handle(skb));
1811:	
1812:			ieee80211_iface_process_status(sdata, skb);
1813:			consume_skb(skb);
1814:	
1815:			kcov_remote_stop();
1816:		}
1817:	
1818:		/* then other type-dependent work */
1819:		switch (sdata->vif.type) {
1820:		case NL80211_IFTYPE_STATION:
1821:			ieee80211_sta_work(sdata);
1822:			break;
1823:		case NL80211_IFTYPE_ADHOC:
1824:			ieee80211_ibss_work(sdata);
1825:			break;
1826:		case NL80211_IFTYPE_MESH_POINT:
1827:			if (!ieee80211_vif_is_mesh(&sdata->vif))
1828:				break;
1829:			ieee80211_mesh_work(sdata);
1830:			break;
1831:		case NL80211_IFTYPE_OCB:
1832:			ieee80211_ocb_work(sdata);
1833:			break;
1834:		default:
1835:			break;
1836:		}
1837:	}
 SourceFile:net/mac80211/iface.c]

gemini-3-flash-preview

							input: 68895
							output: 36
							thoughts: 111
						

**Deconstructing the 802.11 Interface Work Function**

Okay, so I'm looking at this `ieee80211_iface_work` function. My initial read tells me it's responsible for pulling skbs—socket buffer structures—from `sdata->skb_queue`. That makes sense; it's a standard queue processing pattern. The interesting part is that if a received skb's protocol type matches `ETH_P_TDLS` (which, let's be honest, is a bit niche), it dives into `ieee80211_process_tdls_channel_switch`.

Now, the crucial question pops up immediately: Where are these skbs *coming* from? If they're being processed by this "work" function, they've got to have originated somewhere. My gut instinct points toward the RX (receive) path. It's a classic flow: data arrives, gets processed on the receive side, and somehow ends up in this queue, waiting for `ieee80211_iface_work` to handle it.

So, let's dig deeper and figure out where exactly `sdata->skb_queue` is being manipulated. Time to trace those calls!

map[Name:ieee80211_sub_if_data::skb_queue]

map[References:[map[ReferenceKind:takes-address-of ReferencingEntityKind:function ReferencingEntityName:__ieee80211_queue_skb_to_iface SourceFile:net/mac80211/rx.c SourceLine:238] map[ReferenceKind:takes-address-of ReferencingEntityKind:function ReferencingEntityName:ieee80211_add_virtual_monitor SourceFile:net/mac80211/iface.c SourceLine:1249] map[ReferenceKind:takes-address-of ReferencingEntityKind:function ReferencingEntityName:ieee80211_csa_connection_drop_work SourceFile:net/mac80211/ibss.c SourceLine:721] map[ReferenceKind:takes-address-of ReferencingEntityKind:function ReferencingEntityName:ieee80211_do_stop SourceFile:net/mac80211/iface.c SourceLine:649] map[ReferenceKind:takes-address-of ReferencingEntityKind:function ReferencingEntityName:ieee80211_ibss_leave SourceFile:net/mac80211/ibss.c SourceLine:1832] map[ReferenceKind:takes-address-of ReferencingEntityKind:function ReferencingEntityName:ieee80211_iface_work SourceFile:net/mac80211/iface.c SourceLine:1796] map[ReferenceKind:takes-address-of ReferencingEntityKind:function ReferencingEntityName:ieee80211_ocb_leave SourceFile:net/mac80211/ocb.c SourceLine:234] map[ReferenceKind:takes-address-of ReferencingEntityKind:function ReferencingEntityName:ieee80211_setup_sdata SourceFile:net/mac80211/iface.c SourceLine:1887]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 69875
							output: 59
							thoughts: 38
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating a Potential Network Driver Bottleneck**

Alright, let's see... I'm tracking down a potential bottleneck in the network stack, specifically related to wireless reception. The key function I'm zeroing in on right now is `__ieee80211_queue_skb_to_iface` within `net/mac80211/rx.c`. Given the naming, this function is highly likely the core of the packet queuing path specifically for 802.11 frames upon their reception. My initial hunch is that something within this queuing process – perhaps contention for locks, inefficient buffer management, or even just an unexpected overload condition – is causing a performance issue. I'll need to dig into the surrounding context to see what influences the selection of the queue and how the SKB is actually enqueued. Furthermore, my expertise tells me that I'll have to examine how this function interacts with the different hardware queues. Are we seeing packet drops, increased latency, or perhaps excessive CPU utilization in this function's vicinity? Understanding the specific workload at the time will be crucial.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:__ieee80211_queue_skb_to_iface]

map[SourceCode: 224:	static void __ieee80211_queue_skb_to_iface(struct ieee80211_sub_if_data *sdata,
 225:						   int link_id,
 226:						   struct sta_info *sta,
 227:						   struct sk_buff *skb)
 228:	{
 229:		struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
 230:	
 231:		if (link_id >= 0) {
 232:			status->link_valid = 1;
 233:			status->link_id = link_id;
 234:		} else {
 235:			status->link_valid = 0;
 236:		}
 237:	
 238:		skb_queue_tail(&sdata->skb_queue, skb);
 239:		wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);
 240:		if (sta) {
 241:			struct link_sta_info *link_sta_info;
 242:	
 243:			if (link_id >= 0) {
 244:				link_sta_info = rcu_dereference(sta->link[link_id]);
 245:				if (!link_sta_info)
 246:					return;
 247:			} else {
 248:				link_sta_info = &sta->deflink;
 249:			}
 250:	
 251:			link_sta_info->rx_stats.packets++;
 252:		}
 253:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 70737
							output: 36
							thoughts: 24
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating the Data Flow**

Alright, so I'm digging into this networking code, and I need to understand how packets are being handled. The crucial question at the forefront of my mind right now is: exactly *where* does this `__ieee80211_queue_skb_to_iface` function get called? Understanding the call stack around this function is paramount. It’s the gateway into the interface queuing process for 802.11 frames, and knowing the origins of this function call will reveal the context in which queuing is initiated. Identifying the calling function(s) gives me a critical piece of the puzzle, and guides my next steps in the investigation.

map[Name:__ieee80211_queue_skb_to_iface]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_queue_skb_to_iface SourceFile:net/mac80211/rx.c SourceLine:261] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_h_data SourceFile:net/mac80211/rx.c SourceLine:3312]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 71115
							output: 54
							thoughts: 34
						

Here's my take on the thought process, as if it were my own:

**Diving into the 802.11 Data Reception Path**

Okay, time to dig into the data reception process within the mac80211 stack. I need to get a handle on what's happening when we actually receive 802.11 data frames. Let's start with `ieee80211_rx_h_data`. Right, this is the main handler for data frames, so it's the logical entry point for tracing the execution flow. I'll head over to `net/mac80211/rx.c` and take a look at the code. This is where the real work of decoding and processing incoming 802.11 data happens. I'm going to pay close attention to the data structures and how they're used. I need to understand the sequencing and handoffs between various functions, and how the driver-specific bits come into play. Let's see what we've got.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_h_data]

map[SourceCode:3261:	static ieee80211_rx_result debug_noinline
3262:	ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
3263:	{
3264:		struct ieee80211_sub_if_data *sdata = rx->sdata;
3265:		struct ieee80211_local *local = rx->local;
3266:		struct net_device *dev = sdata->dev;
3267:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
3268:		__le16 fc = hdr->frame_control;
3269:		ieee80211_rx_result res;
3270:		bool port_control;
3271:	
3272:		if (unlikely(!ieee80211_is_data(hdr->frame_control)))
3273:			return RX_CONTINUE;
3274:	
3275:		if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
3276:			return RX_DROP_U_NULL_DATA;
3277:	
3278:		/* Send unexpected-4addr-frame event to hostapd */
3279:		if (ieee80211_has_a4(hdr->frame_control) &&
3280:		    sdata->vif.type == NL80211_IFTYPE_AP) {
3281:			if (rx->sta &&
3282:			    !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT))
3283:				cfg80211_rx_unexpected_4addr_frame(
3284:					rx->sdata->dev, rx->sta->sta.addr, rx->link_id,
3285:					GFP_ATOMIC);
3286:			return RX_DROP_U_UNEXPECTED_4ADDR;
3287:		}
3288:	
3289:		res = __ieee80211_data_to_8023(rx, &port_control);
3290:		if (unlikely(res != RX_CONTINUE))
3291:			return res;
3292:	
3293:		res = ieee80211_rx_mesh_data(rx->sdata, rx->sta, rx->skb);
3294:		if (res != RX_CONTINUE)
3295:			return res;
3296:	
3297:		if (!ieee80211_frame_allowed(rx, fc))
3298:			return RX_DROP_U_PORT_CONTROL;
3299:	
3300:		/* directly handle TDLS channel switch requests/responses */
3301:		if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
3302:							cpu_to_be16(ETH_P_TDLS))) {
3303:			struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
3304:	
3305:			if (pskb_may_pull(rx->skb,
3306:					  offsetof(struct ieee80211_tdls_data, u)) &&
3307:			    tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
3308:			    tf->category == WLAN_CATEGORY_TDLS &&
3309:			    (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
3310:			     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
3311:				rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
3312:				__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
3313:							       rx->sta, rx->skb);
3314:				return RX_QUEUED;
3315:			}
3316:		}
3317:	
3318:		if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
3319:		    unlikely(port_control) && sdata->bss) {
3320:			sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
3321:					     u.ap);
3322:			dev = sdata->dev;
3323:			rx->sdata = sdata;
3324:		}
3325:	
3326:		rx->skb->dev = dev;
3327:	
3328:		if (!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
3329:		    local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 &&
3330:		    !is_multicast_ether_addr(
3331:			    ((struct ethhdr *)rx->skb->data)->h_dest) &&
3332:		    (!local->scanning &&
3333:		     !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)))
3334:			mod_timer(&local->dynamic_ps_timer, jiffies +
3335:				  msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
3336:	
3337:		ieee80211_deliver_skb(rx);
3338:	
3339:		return RX_QUEUED;
3340:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 73015
							output: 35
							thoughts: 1029
						

**TDLS Channel Switch Logic - A Quick Review**

Okay, so I'm looking at this TDLS channel switch handling in `net/mac80211/rx.c`. Specifically, lines 3301-3316 caught my eye.  The code checks for TDLS frames, and if it is a channel switch request or response, it sets the protocol to `ETH_P_TDLS` and queues it to the interface using `__ieee80211_queue_skb_to_iface`. This is pretty standard for handling these specialized frames.

Then, there's `ieee80211_process_tdls_channel_switch`, which acts on the queued frame. It uses a switch statement based on the `action_code` to process the request or response. If the `action_code` isn't a known value (request or response), it hits a `WARN_ON_ONCE(1)` and returns. My immediate thought was: "Hang on a second..." The preceding code in `ieee80211_rx_h_data` *only* queues frames with known `action_code` values! So, how can the `default` case in the switch statement *ever* be reached? It looks like a dead path, which feels wrong.

Then, I remembered - this all happens *within* the context of data frames, and TDLS frames are encapsulated.

The immediate code path from `ieee80211_rx_h_data` would not trigger the warning. I started to wonder if there were any other possible ways to get an `ETH_P_TDLS` frame into the `sdata->skb_queue`. I checked for calls to `__ieee80211_queue_skb_to_iface` and I know that `ieee80211_queue_skb_to_iface` itself is a caller, as is `ieee80211_rx_h_data`.  So from this direct path, the warning is unachievable, as the data is already validated before queueing.

map[Name:ieee80211_queue_skb_to_iface]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_handle_mu_mimo_mon SourceFile:net/mac80211/rx.c SourceLine:304] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_h_action SourceFile:net/mac80211/rx.c SourceLine:3959] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_h_ext SourceFile:net/mac80211/rx.c SourceLine:4116] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_h_mgmt SourceFile:net/mac80211/rx.c SourceLine:4173] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_reorder_ampdu SourceFile:net/mac80211/rx.c SourceLine:1499]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 74886
							output: 54
							thoughts: 56
						

Here's my summary, as the thought process unfolds:

**Digging into the Function Call Chain**

Okay, so I was looking at `cfg80211_rx` and realized that this `ieee80211_rx_h` function is called from a few places. I need to understand this better. Now, hang on a second... wait, `ieee80211_rx_h_action` *also* calls it? That's interesting; I hadn't spotted that connection immediately. Alright, I'll definitely need to factor in how the action frame handling interacts with this core receive path. The context of an action frame could significantly change the processing logic. Let's go ahead and examine `ieee80211_rx_h_action`. I'll find it in `net/mac80211/rx.c`. I need to get a clear picture of its behavior.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_h_action]

map[SourceCode:3601:	static ieee80211_rx_result debug_noinline
3602:	ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
3603:	{
3604:		struct ieee80211_local *local = rx->local;
3605:		struct ieee80211_sub_if_data *sdata = rx->sdata;
3606:		struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
3607:		struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
3608:		int len = rx->skb->len;
3609:	
3610:		if (!ieee80211_is_action(mgmt->frame_control))
3611:			return RX_CONTINUE;
3612:	
3613:		if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC &&
3614:		    mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED &&
3615:		    mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
3616:			return RX_DROP_U_ACTION_UNKNOWN_SRC;
3617:	
3618:		switch (mgmt->u.action.category) {
3619:		case WLAN_CATEGORY_HT:
3620:			/* reject HT action frames from stations not supporting HT
3621:			 * or not HE Capable
3622:			 */
3623:			if (!rx->link_sta->pub->ht_cap.ht_supported &&
3624:			    !rx->link_sta->pub->he_cap.has_he)
3625:				goto invalid;
3626:	
3627:			if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3628:			    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3629:			    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3630:			    sdata->vif.type != NL80211_IFTYPE_AP &&
3631:			    sdata->vif.type != NL80211_IFTYPE_ADHOC)
3632:				break;
3633:	
3634:			/* verify action & smps_control/chanwidth are present */
3635:			if (len < IEEE80211_MIN_ACTION_SIZE + 2)
3636:				goto invalid;
3637:	
3638:			switch (mgmt->u.action.u.ht_smps.action) {
3639:			case WLAN_HT_ACTION_SMPS: {
3640:				struct ieee80211_supported_band *sband;
3641:				enum ieee80211_smps_mode smps_mode;
3642:				struct sta_opmode_info sta_opmode = {};
3643:	
3644:				if (sdata->vif.type != NL80211_IFTYPE_AP &&
3645:				    sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
3646:					goto handled;
3647:	
3648:				/* convert to HT capability */
3649:				switch (mgmt->u.action.u.ht_smps.smps_control) {
3650:				case WLAN_HT_SMPS_CONTROL_DISABLED:
3651:					smps_mode = IEEE80211_SMPS_OFF;
3652:					break;
3653:				case WLAN_HT_SMPS_CONTROL_STATIC:
3654:					smps_mode = IEEE80211_SMPS_STATIC;
3655:					break;
3656:				case WLAN_HT_SMPS_CONTROL_DYNAMIC:
3657:					smps_mode = IEEE80211_SMPS_DYNAMIC;
3658:					break;
3659:				default:
3660:					goto invalid;
3661:				}
3662:	
3663:				/* if no change do nothing */
3664:				if (rx->link_sta->pub->smps_mode == smps_mode)
3665:					goto handled;
3666:				rx->link_sta->pub->smps_mode = smps_mode;
3667:				sta_opmode.smps_mode =
3668:					ieee80211_smps_mode_to_smps_mode(smps_mode);
3669:				sta_opmode.changed = STA_OPMODE_SMPS_MODE_CHANGED;
3670:	
3671:				sband = rx->local->hw.wiphy->bands[status->band];
3672:	
3673:				rate_control_rate_update(local, sband, rx->link_sta,
3674:							 IEEE80211_RC_SMPS_CHANGED);
3675:				cfg80211_sta_opmode_change_notify(sdata->dev,
3676:								  rx->sta->addr,
3677:								  &sta_opmode,
3678:								  GFP_ATOMIC);
3679:				goto handled;
3680:			}
3681:			case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
3682:				u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
3683:	
3684:				if (chanwidth != IEEE80211_HT_CHANWIDTH_20MHZ &&
3685:				    chanwidth != IEEE80211_HT_CHANWIDTH_ANY)
3686:					goto invalid;
3687:	
3688:				/* If it doesn't support 40 MHz it can't change ... */
3689:				if (!(rx->link_sta->pub->ht_cap.cap &
3690:					IEEE80211_HT_CAP_SUP_WIDTH_20_40))
3691:					goto handled;
3692:	
3693:				goto queue;
3694:			}
3695:			default:
3696:				goto invalid;
3697:			}
3698:	
3699:			break;
3700:		case WLAN_CATEGORY_PUBLIC:
3701:		case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION:
3702:			if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3703:				goto invalid;
3704:			if (sdata->vif.type != NL80211_IFTYPE_STATION)
3705:				break;
3706:			if (!rx->sta)
3707:				break;
3708:			if (!ether_addr_equal(mgmt->bssid, sdata->deflink.u.mgd.bssid))
3709:				break;
3710:			if (mgmt->u.action.u.ext_chan_switch.action_code !=
3711:					WLAN_PUB_ACTION_EXT_CHANSW_ANN)
3712:				break;
3713:			if (len < offsetof(struct ieee80211_mgmt,
3714:					   u.action.u.ext_chan_switch.variable))
3715:				goto invalid;
3716:			goto queue;
3717:		case WLAN_CATEGORY_VHT:
3718:			if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3719:			    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3720:			    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3721:			    sdata->vif.type != NL80211_IFTYPE_AP &&
3722:			    sdata->vif.type != NL80211_IFTYPE_ADHOC)
3723:				break;
3724:	
3725:			/* verify action code is present */
3726:			if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3727:				goto invalid;
3728:	
3729:			switch (mgmt->u.action.u.vht_opmode_notif.action_code) {
3730:			case WLAN_VHT_ACTION_OPMODE_NOTIF: {
3731:				/* verify opmode is present */
3732:				if (len < IEEE80211_MIN_ACTION_SIZE + 2)
3733:					goto invalid;
3734:				goto queue;
3735:			}
3736:			case WLAN_VHT_ACTION_GROUPID_MGMT: {
3737:				if (len < IEEE80211_MIN_ACTION_SIZE + 25)
3738:					goto invalid;
3739:				goto queue;
3740:			}
3741:			default:
3742:				break;
3743:			}
3744:			break;
3745:		case WLAN_CATEGORY_BACK:
3746:			if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3747:			    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3748:			    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3749:			    sdata->vif.type != NL80211_IFTYPE_AP &&
3750:			    sdata->vif.type != NL80211_IFTYPE_ADHOC)
3751:				break;
3752:	
3753:			/* verify action_code is present */
3754:			if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3755:				break;
3756:	
3757:			switch (mgmt->u.action.u.addba_req.action_code) {
3758:			case WLAN_ACTION_ADDBA_REQ:
3759:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3760:					   sizeof(mgmt->u.action.u.addba_req)))
3761:					goto invalid;
3762:				break;
3763:			case WLAN_ACTION_ADDBA_RESP:
3764:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3765:					   sizeof(mgmt->u.action.u.addba_resp)))
3766:					goto invalid;
3767:				break;
3768:			case WLAN_ACTION_DELBA:
3769:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3770:					   sizeof(mgmt->u.action.u.delba)))
3771:					goto invalid;
3772:				break;
3773:			default:
3774:				goto invalid;
3775:			}
3776:	
3777:			goto queue;
3778:		case WLAN_CATEGORY_SPECTRUM_MGMT:
3779:			/* verify action_code is present */
3780:			if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3781:				break;
3782:	
3783:			switch (mgmt->u.action.u.measurement.action_code) {
3784:			case WLAN_ACTION_SPCT_MSR_REQ:
3785:				if (status->band != NL80211_BAND_5GHZ)
3786:					break;
3787:	
3788:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3789:					   sizeof(mgmt->u.action.u.measurement)))
3790:					break;
3791:	
3792:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3793:					break;
3794:	
3795:				ieee80211_process_measurement_req(sdata, mgmt, len);
3796:				goto handled;
3797:			case WLAN_ACTION_SPCT_CHL_SWITCH: {
3798:				u8 *bssid;
3799:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3800:					   sizeof(mgmt->u.action.u.chan_switch)))
3801:					break;
3802:	
3803:				if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3804:				    sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3805:				    sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3806:					break;
3807:	
3808:				if (sdata->vif.type == NL80211_IFTYPE_STATION)
3809:					bssid = sdata->deflink.u.mgd.bssid;
3810:				else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3811:					bssid = sdata->u.ibss.bssid;
3812:				else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
3813:					bssid = mgmt->sa;
3814:				else
3815:					break;
3816:	
3817:				if (!ether_addr_equal(mgmt->bssid, bssid))
3818:					break;
3819:	
3820:				goto queue;
3821:				}
3822:			}
3823:			break;
3824:		case WLAN_CATEGORY_SELF_PROTECTED:
3825:			if (len < (IEEE80211_MIN_ACTION_SIZE +
3826:				   sizeof(mgmt->u.action.u.self_prot.action_code)))
3827:				break;
3828:	
3829:			switch (mgmt->u.action.u.self_prot.action_code) {
3830:			case WLAN_SP_MESH_PEERING_OPEN:
3831:			case WLAN_SP_MESH_PEERING_CLOSE:
3832:			case WLAN_SP_MESH_PEERING_CONFIRM:
3833:				if (!ieee80211_vif_is_mesh(&sdata->vif))
3834:					goto invalid;
3835:				if (sdata->u.mesh.user_mpm)
3836:					/* userspace handles this frame */
3837:					break;
3838:				goto queue;
3839:			case WLAN_SP_MGK_INFORM:
3840:			case WLAN_SP_MGK_ACK:
3841:				if (!ieee80211_vif_is_mesh(&sdata->vif))
3842:					goto invalid;
3843:				break;
3844:			}
3845:			break;
3846:		case WLAN_CATEGORY_MESH_ACTION:
3847:			if (len < (IEEE80211_MIN_ACTION_SIZE +
3848:				   sizeof(mgmt->u.action.u.mesh_action.action_code)))
3849:				break;
3850:	
3851:			if (!ieee80211_vif_is_mesh(&sdata->vif))
3852:				break;
3853:			if (mesh_action_is_path_sel(mgmt) &&
3854:			    !mesh_path_sel_is_hwmp(sdata))
3855:				break;
3856:			goto queue;
3857:		case WLAN_CATEGORY_S1G:
3858:			if (len < offsetofend(typeof(*mgmt),
3859:					      u.action.u.s1g.action_code))
3860:				break;
3861:	
3862:			switch (mgmt->u.action.u.s1g.action_code) {
3863:			case WLAN_S1G_TWT_SETUP:
3864:			case WLAN_S1G_TWT_TEARDOWN:
3865:				if (ieee80211_process_rx_twt_action(rx))
3866:					goto queue;
3867:				break;
3868:			default:
3869:				break;
3870:			}
3871:			break;
3872:		case WLAN_CATEGORY_PROTECTED_EHT:
3873:			if (len < offsetofend(typeof(*mgmt),
3874:					      u.action.u.ttlm_req.action_code))
3875:				break;
3876:	
3877:			switch (mgmt->u.action.u.ttlm_req.action_code) {
3878:			case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ:
3879:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3880:					break;
3881:	
3882:				if (len < offsetofend(typeof(*mgmt),
3883:						      u.action.u.ttlm_req))
3884:					goto invalid;
3885:				goto queue;
3886:			case WLAN_PROTECTED_EHT_ACTION_TTLM_RES:
3887:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3888:					break;
3889:	
3890:				if (len < offsetofend(typeof(*mgmt),
3891:						      u.action.u.ttlm_res))
3892:					goto invalid;
3893:				goto queue;
3894:			case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
3895:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3896:					break;
3897:	
3898:				if (len < offsetofend(typeof(*mgmt),
3899:						      u.action.u.ttlm_tear_down))
3900:					goto invalid;
3901:				goto queue;
3902:			case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
3903:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3904:					break;
3905:	
3906:				/* The reconfiguration response action frame must
3907:				 * least one 'Status Duple' entry (3 octets)
3908:				 */
3909:				if (len <
3910:				    offsetofend(typeof(*mgmt),
3911:						u.action.u.ml_reconf_resp) + 3)
3912:					goto invalid;
3913:				goto queue;
3914:			case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP:
3915:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3916:					break;
3917:	
3918:				if (len < offsetofend(typeof(*mgmt),
3919:						      u.action.u.epcs) +
3920:				    IEEE80211_EPCS_ENA_RESP_BODY_LEN)
3921:					goto invalid;
3922:				goto queue;
3923:			case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN:
3924:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3925:					break;
3926:	
3927:				if (len < offsetofend(typeof(*mgmt),
3928:						      u.action.u.epcs))
3929:					goto invalid;
3930:				goto queue;
3931:			case WLAN_PROTECTED_EHT_ACTION_EML_OP_MODE_NOTIF:
3932:				if (sdata->vif.type != NL80211_IFTYPE_AP)
3933:					break;
3934:	
3935:				if (len < offsetofend(typeof(*mgmt),
3936:						      u.action.u.eml_omn))
3937:					goto invalid;
3938:				goto queue;
3939:			default:
3940:				break;
3941:			}
3942:			break;
3943:		}
3944:	
3945:		return RX_CONTINUE;
3946:	
3947:	 invalid:
3948:		status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM;
3949:		/* will return in the next handlers */
3950:		return RX_CONTINUE;
3951:	
3952:	 handled:
3953:		if (rx->sta)
3954:			rx->link_sta->rx_stats.packets++;
3955:		dev_kfree_skb(rx->skb);
3956:		return RX_QUEUED;
3957:	
3958:	 queue:
3959:		ieee80211_queue_skb_to_iface(sdata, rx->link_id, rx->sta, rx->skb);
3960:		return RX_QUEUED;
3961:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 81257
							output: 58
							thoughts: 1033
						

**TDLS Frame Handling in mac80211: A Deep Dive**

Okay, so I'm digging into how mac80211 handles TDLS frames, and it seems there's a bit of a split in how things are routed.  Initially, it looks like `ieee80211_rx_h_action` might not be explicitly handling `WLAN_CATEGORY_TDLS` frames, which is a bit of a red flag.  Then I remember: TDLS management frames *can* arrive as Action frames, specifically Category TDLS frames. However,  `ieee80211_rx_h_data` deals with the encapsulated TDLS frames, using EtherType `ETH_P_TDLS` (0x890d).

The TDLS protocol has this bifurcated approach to handling its management frames. Most frames are encapsulated in data frames using the standard EtherType, but the TDLS Discovery Response, being a Public Action frame, gets sent as an Action frame belonging to the Category TDLS.

I'm focusing in on `ieee80211_rx_h_data` now, since that's where I can see `ETH_P_TDLS` being specifically checked. The code there looks like it's parsing the TDLS frame, checking the `payload_type`, `category`, and `action_code` to make decisions.

```c
3301:		if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
3302:							cpu_to_be16(ETH_P_TDLS))) {
3303:			struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
3304:	
3305:			if (pskb_may_pull(rx->skb,
3306:					  offsetof(struct ieee80211_tdls_data, u)) &&
3307:			    tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
3308:			    tf->category == WLAN_CATEGORY_TDLS &&
3309:			    (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
3310:			     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
3311:				rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
3312:				__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
3313:							       rx->sta, rx->skb);
3314:				return RX_QUEUED;
3315:			}
3316:		}
```

It seems that the special handling where `ETH_P_TDLS` is checked is only done when the `action_code` is `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE`. That's where it sets `rx->skb->protocol` to `ETH_P_TDLS` and queues it, otherwise it just calls `ieee80211_deliver_skb(rx)` (line 3337). This suggests that other types of TDLS frames that come through `ieee80211_rx_h_data` may simply get delivered to the network stack.  The network stack *might* have its own handlers for `ETH_P_TDLS`.

But here's a wrinkle:  `ieee80211_iface_work` also checks for `ETH_P_TDLS`, so there's a potential double dip...

```c
1799:			if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1800:				ieee80211_process_tdls_channel_switch(sdata, skb);
```

If `skb->protocol` is indeed `ETH_P_TDLS`, it calls `ieee80211_process_tdls_channel_switch`.  However, back in `ieee80211_rx_h_data`, I see that `rx->skb->protocol` is *only* set to `ETH_P_TDLS` when the frame is a CHANNEL SWITCH REQUEST/RESPONSE.  If it's

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:__ieee80211_data_to_8023]

map[SourceCode:2624:	static ieee80211_rx_result
2625:	__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
2626:	{
2627:		struct ieee80211_sub_if_data *sdata = rx->sdata;
2628:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
2629:		bool check_port_control = false;
2630:		struct ethhdr *ehdr;
2631:		int ret;
2632:	
2633:		*port_control = false;
2634:		if (ieee80211_has_a4(hdr->frame_control) &&
2635:		    sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
2636:			return RX_DROP_U_UNEXPECTED_VLAN_4ADDR;
2637:	
2638:		if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2639:		    !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
2640:			if (!sdata->u.mgd.use_4addr)
2641:				return RX_DROP_U_UNEXPECTED_STA_4ADDR;
2642:			else if (!ether_addr_equal(hdr->addr1, sdata->vif.addr))
2643:				check_port_control = true;
2644:		}
2645:	
2646:		if (is_multicast_ether_addr(hdr->addr1) &&
2647:		    sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
2648:			return RX_DROP_U_UNEXPECTED_VLAN_MCAST;
2649:	
2650:		ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
2651:		if (ret < 0)
2652:			return RX_DROP_U_INVALID_8023;
2653:	
2654:		ehdr = (struct ethhdr *) rx->skb->data;
2655:		if (ehdr->h_proto == rx->sdata->control_port_protocol)
2656:			*port_control = true;
2657:		else if (check_port_control)
2658:			return RX_DROP_U_NOT_PORT_CONTROL;
2659:	
2660:		return RX_CONTINUE;
2661:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 84202
							output: 57
							thoughts: 26
						

Okay, here's my attempt at summarizing that thought process, keeping in mind I'm speaking to a fellow expert:

**Investigating the `ieee80211_data_to_8023` Function Call**

Alright, that code path is calling `ieee80211_data_to_8023`. My initial thought is, "Okay, that's interesting; what's it doing?" I immediately want to dig into that function. My brain’s already racing; I need to understand the data conversion. Is it handling the encapsulation, the headers, the frame format translation? Specifically, I'm thinking about the implications for performance and potential error points. Is this a critical piece that might be bottlenecking things? I need to analyze this further. Let's get to the bottom of it.

map[ContextFile:net/mac80211/util.c IncludeLines:true Name:ieee80211_data_to_8023]

map[SourceCode:7244:	/**
7245:	 * ieee80211_data_to_8023 - convert an 802.11 data frame to 802.3
7246:	 * @skb: the 802.11 data frame
7247:	 * @addr: the device MAC address
7248:	 * @iftype: the virtual interface type
7249:	 * Return: 0 on success. Non-zero on error.
7250:	 */
7251:	static inline int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
7252:						 enum nl80211_iftype iftype)
7253:	{
7254:		return ieee80211_data_to_8023_exthdr(skb, NULL, addr, iftype, 0, false);
7255:	}
 SourceFile:include/net/cfg80211.h]

gemini-3-flash-preview

							input: 84754
							output: 31
							thoughts: 169
						

**Navigating the Codebase**

Okay, so I'm trying to locate the source code for `ieee80211_data_to_8023`. The tool is pointing me towards `include/net/cfg80211.h`. Hmm, that's a bit odd. My initial thought is, "Wait, it's really in `include/net/cfg80211.h`?". I know `cfg80211.h` well; it's the configuration interface. It's possible the tool is misinterpreting something. Perhaps it is a static inline function defined there and the tool doesn't know to tell me that. I need to be sure.

Maybe this utility function resides in `net/mac80211/util.c` instead, given that it's a MAC layer function. But then again, the tool specifically says `SourceFile: include/net/cfg80211.h`. This is frustrating, I need to know where this function is.

Alright, I need to double-check `cfg80211.h`. It is unlikely to be in `net/mac80211/util.c`. Time to verify that the tool is, in fact, correct, and then find where it is defined.

map[SourceFile:net/mac80211/util.c]

map[Entities:[map[Kind:function Name:__ieee80211_flush_queues] map[Kind:function Name:__ieee80211_get_radio_mask] map[Kind:function Name:__ieee80211_iterate_interfaces] map[Kind:function Name:__ieee80211_iterate_stations] map[Kind:function Name:__ieee80211_stop_queue] map[Kind:function Name:__ieee80211_wake_queue] map[Kind:function Name:__ieee80211_wake_txqs] map[Kind:function Name:__iterate_interfaces] map[Kind:function Name:__iterate_stations] map[Kind:function Name:_ieee80211_wake_txqs] map[Kind:function Name:ieee80211_add_aid_request_ie] map[Kind:function Name:ieee80211_add_pending_skb] map[Kind:function Name:ieee80211_add_pending_skbs] map[Kind:function Name:ieee80211_add_s1g_capab_ie] map[Kind:function Name:ieee80211_add_wmm_info_ie] map[Kind:function Name:ieee80211_assign_chanctx] map[Kind:function Name:ieee80211_ave_rssi] map[Kind:function Name:ieee80211_build_preq_ies] map[Kind:function Name:ieee80211_build_probe_req] map[Kind:function Name:ieee80211_calculate_rx_timestamp] map[Kind:function Name:ieee80211_can_queue_work] map[Kind:function Name:ieee80211_chanctx_radar_detect] map[Kind:function Name:ieee80211_chandef_downgrade] map[Kind:function Name:ieee80211_chandef_eht_oper] map[Kind:function Name:ieee80211_chandef_he_6ghz_oper] map[Kind:function Name:ieee80211_chandef_ht_oper] map[Kind:function Name:ieee80211_chandef_s1g_oper] map[Kind:function Name:ieee80211_chandef_vht_oper] map[Kind:function Name:ieee80211_check_combinations] map[Kind:function Name:ieee80211_clear_tpe] map[Kind:function Name:ieee80211_conn_mode_str] map[Kind:function Name:ieee80211_ctstoself_duration] map[Kind:function Name:ieee80211_dfs_cac_cancel] map[Kind:function Name:ieee80211_dfs_radar_detected_work] map[Kind:function Name:ieee80211_encode_usf] map[Kind:function Name:ieee80211_extend_absent_time] map[Kind:function Name:ieee80211_extend_noa_desc] map[Kind:function Name:ieee80211_fill_ifcomb_params] map[Kind:function Name:ieee80211_flush_completed_scan] map[Kind:function Name:ieee80211_flush_queues] map[Kind:function Name:ieee80211_frame_duration] map[Kind:function Name:ieee80211_generic_frame_duration] map[Kind:function Name:ieee80211_get_adjusted_he_cap] map[Kind:function Name:ieee80211_get_bssid] map[Kind:function Name:ieee80211_get_noa_absent_time] map[Kind:function Name:ieee80211_get_radio_mask] map[Kind:function Name:ieee80211_get_vif_queues] map[Kind:function Name:ieee80211_handle_reconfig_failure] map[Kind:function Name:ieee80211_handle_wake_tx_queue] map[Kind:function Name:ieee80211_hw_restart_disconnect] map[Kind:function Name:ieee80211_ie_build_eht_oper] map[Kind:function Name:ieee80211_ie_build_he_oper] map[Kind:function Name:ieee80211_ie_build_ht_cap] map[Kind:function Name:ieee80211_ie_build_ht_oper] map[Kind:function Name:ieee80211_ie_build_vht_cap] map[Kind:function Name:ieee80211_ie_build_vht_oper] map[Kind:function Name:ieee80211_ie_build_wide_bw_cs] map[Kind:function Name:ieee80211_ie_len_eht_cap] map[Kind:function Name:ieee80211_ie_len_he_cap] map[Kind:function Name:ieee80211_ie_split_vendor] map[Kind:function Name:ieee80211_is_radio_idx_in_scan_req] map[Kind:function Name:ieee80211_iter_max_chans] map[Kind:function Name:ieee80211_iterate_active_interfaces_atomic] map[Kind:function Name:ieee80211_iterate_interfaces] map[Kind:function Name:ieee80211_iterate_stations_atomic] map[Kind:function Name:ieee80211_max_num_channels] map[Kind:function Name:ieee80211_mcs_to_chains] map[Kind:function Name:ieee80211_min_bw_limit_from_chandef] map[Kind:function Name:ieee80211_parse_p2p_noa] map[Kind:function Name:ieee80211_put_eht_cap] map[Kind:function Name:ieee80211_put_he_6ghz_cap] map[Kind:function Name:ieee80211_put_he_cap] map[Kind:function Name:ieee80211_put_preq_ies] map[Kind:function Name:ieee80211_put_preq_ies_band] map[Kind:function Name:ieee80211_put_reg_conn] map[Kind:function Name:ieee80211_put_s1g_cap] map[Kind:function Name:ieee80211_put_srates_elem] map[Kind:function Name:ieee80211_put_uhr_cap] map[Kind:function Name:ieee80211_queue_delayed_work] map[Kind:function Name:ieee80211_queue_stopped] map[Kind:function Name:ieee80211_queue_work] map[Kind:function Name:ieee80211_radar_detected] map[Kind:function Name:ieee80211_radar_mark_chan_ctx_iterator] map[Kind:function Name:ieee80211_recalc_dtim] map[Kind:function Name:ieee80211_recalc_min_chandef] map[Kind:function Name:ieee80211_recalc_sb_count] map[Kind:function Name:ieee80211_recalc_smps] map[Kind:function Name:ieee80211_reconfig] map[Kind:function Name:ieee80211_reconfig_ap_links] map[Kind:function Name:ieee80211_reconfig_disconnect] map[Kind:function Name:ieee80211_reconfig_nan] map[Kind:function Name:ieee80211_reconfig_stations] map[Kind:function Name:ieee80211_regulatory_limit_wmm_params] map[Kind:function Name:ieee80211_resume_disconnect] map[Kind:function Name:ieee80211_rts_duration] map[Kind:function Name:ieee80211_sdata_uses_radio] map[Kind:function Name:ieee80211_send_action_csa] map[Kind:function Name:ieee80211_send_auth] map[Kind:function Name:ieee80211_send_deauth_disassoc] map[Kind:function Name:ieee80211_set_wmm_default] map[Kind:function Name:ieee80211_sta_get_rates] map[Kind:function Name:ieee80211_stop_device] map[Kind:function Name:ieee80211_stop_queue] map[Kind:function Name:ieee80211_stop_queue_by_reason] map[Kind:function Name:ieee80211_stop_queues] map[Kind:function Name:ieee80211_stop_queues_by_reason] map[Kind:function Name:ieee80211_tx_set_protected] map[Kind:function Name:ieee80211_txq_get_depth] map[Kind:function Name:ieee80211_update_p2p_noa] map[Kind:function Name:ieee80211_vif_nan_started] map[Kind:function Name:ieee80211_vif_to_wdev] map[Kind:function Name:ieee80211_wake_queue] map[Kind:function Name:ieee80211_wake_queue_by_reason] map[Kind:function Name:ieee80211_wake_queues] map[Kind:function Name:ieee80211_wake_queues_by_reason] map[Kind:function Name:ieee80211_wake_txqs] map[Kind:function Name:wake_tx_push_queue] map[Kind:function Name:wdev_to_ieee80211_vif] map[Kind:function Name:wiphy_to_ieee80211_hw] map[Kind:global_variable Name:__UNIQUE_ID_addressable___ieee80211_iterate_interfaces_2696] map[Kind:global_variable Name:__UNIQUE_ID_addressable___ieee80211_iterate_stations_2702] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_ave_rssi_2822] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_ctstoself_duration_2663] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_generic_frame_duration_2661] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_handle_wake_tx_queue_2664] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_hw_restart_disconnect_2785] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_iterate_active_interfaces_atomic_2691] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_iterate_interfaces_2690] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_iterate_stations_atomic_2699] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_parse_p2p_noa_2845] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_queue_delayed_work_2706] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_queue_stopped_2684] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_queue_work_2705] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_radar_detected_2832] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_resume_disconnect_2786] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_rts_duration_2662] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_stop_queue_2676] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_stop_queues_2681] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_txq_get_depth_2874] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_update_p2p_noa_2844] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_vif_nan_started_2900] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_vif_to_wdev_2704] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_wake_queue_2673] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_wake_queues_2685] map[Kind:global_variable Name:__UNIQUE_ID_addressable_wdev_to_ieee80211_vif_2703] map[Kind:global_variable Name:__UNIQUE_ID_addressable_wiphy_to_ieee80211_hw_2660] map[Kind:global_variable Name:__gendwarfksyms_ptr___ieee80211_iterate_interfaces] map[Kind:global_variable Name:__gendwarfksyms_ptr___ieee80211_iterate_stations] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_ave_rssi] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_ctstoself_duration] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_generic_frame_duration] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_handle_wake_tx_queue] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_hw_restart_disconnect] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_iterate_active_interfaces_atomic] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_iterate_interfaces] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_iterate_stations_atomic] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_parse_p2p_noa] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_queue_delayed_work] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_queue_stopped] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_queue_work] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_radar_detected] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_resume_disconnect] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_rts_duration] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_stop_queue] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_stop_queues] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_txq_get_depth] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_update_p2p_noa] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_vif_nan_started] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_vif_to_wdev] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_wake_queue] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_wake_queues] map[Kind:global_variable Name:__gendwarfksyms_ptr_wdev_to_ieee80211_vif] map[Kind:global_variable Name:__gendwarfksyms_ptr_wiphy_to_ieee80211_hw] map[Kind:global_variable Name:ieee80211_ac_to_qos_mask] map[Kind:global_variable Name:ieee80211_conn_settings_unlimited] map[Kind:global_variable Name:mac80211_wiphy_privid]]]

gemini-3-flash-preview

							input: 90249
							output: 32
							thoughts: 52
						

Okay, here's my take on those thoughts, framed as my own:

**Missing Function and a Hunt Begins**

Hmm, I'm just taking a look at `net/mac80211/util.c` and I'm not seeing `ieee80211_data_to_8023` in there. That's a little strange, I could have sworn that function was part of the 802.11 data conversion utility set... It's possible I'm just looking in the wrong place, or perhaps it's been refactored or renamed. Alright, no matter, I'll go ahead and execute a full tree search; a simple `find` might be enough, a more focused grep will probably yield better results. Let's see if I can flush it out that way.

map[Expression:int ieee80211_data_to_8023\(]

map[Output:include/net/cfg80211.h=7240=int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
--
include/net/cfg80211.h-7250- */
include/net/cfg80211.h:7251:static inline int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
include/net/cfg80211.h-7252-					 enum nl80211_iftype iftype)
]

gemini-3-flash-preview

							input: 90691
							output: 27
							thoughts: 30
						

Here's my take on the thought process, summarized as you requested:

**Deconstructing `cfg80211.h`**

Alright, let's dive in. I'm looking at a `static inline` function definition, and it looks like it's within `include/net/cfg80211.h`. My immediate instinct is to dissect that inline function's purpose. Let's see precisely what it's defined to do. Understanding the specific function will unlock further insight. Time to dig in and see the details of this important inline function.

map[File:include/net/cfg80211.h]

map[Contents:/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __NET_CFG80211_H
#define __NET_CFG80211_H
/*
 * 802.11 device and configuration interface
 *
 * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014 Intel Mobile Communications GmbH
 * Copyright 2015-2017	Intel Deutschland GmbH
 * Copyright (C) 2018-2026 Intel Corporation
 */

#include <linux/ethtool.h>
#include <uapi/linux/rfkill.h>
#include <linux/netdevice.h>
#include <linux/debugfs.h>
#include <linux/list.h>
#include <linux/bug.h>
#include <linux/netlink.h>
#include <linux/skbuff.h>
#include <linux/nl80211.h>
#include <linux/if_ether.h>
#include <linux/ieee80211.h>
#include <linux/net.h>
#include <linux/rfkill.h>
#include <net/regulatory.h>

/**
 * DOC: Introduction
 *
 * cfg80211 is the configuration API for 802.11 devices in Linux. It bridges
 * userspace and drivers, and offers some utility functionality associated
 * with 802.11. cfg80211 must, directly or indirectly via mac80211, be used
 * by all modern wireless drivers in Linux, so that they offer a consistent
 * API through nl80211. For backward compatibility, cfg80211 also offers
 * wireless extensions to userspace, but hides them from drivers completely.
 *
 * Additionally, cfg80211 contains code to help enforce regulatory spectrum
 * use restrictions.
 */


/**
 * DOC: Device registration
 *
 * In order for a driver to use cfg80211, it must register the hardware device
 * with cfg80211. This happens through a number of hardware capability structs
 * described below.
 *
 * The fundamental structure for each device is the 'wiphy', of which each
 * instance describes a physical wireless device connected to the system. Each
 * such wiphy can have zero, one, or many virtual interfaces associated with
 * it, which need to be identified as such by pointing the network interface's
 * @ieee80211_ptr pointer to a &struct wireless_dev which further describes
 * the wireless part of the interface. Normally this struct is embedded in the
 * network interface's private data area. Drivers can optionally allow creating
 * or destroying virtual interfaces on the fly, but without at least one or the
 * ability to create some the wireless device isn't useful.
 *
 * Each wiphy structure contains device capability information, and also has
 * a pointer to the various operations the driver offers. The definitions and
 * structures here describe these capabilities in detail.
 */

struct wiphy;

/*
 * wireless hardware capability structures
 */

/**
 * enum ieee80211_channel_flags - channel flags
 *
 * Channel flags set by the regulatory control code.
 *
 * @IEEE80211_CHAN_DISABLED: This channel is disabled.
 * @IEEE80211_CHAN_NO_IR: do not initiate radiation, this includes
 *	sending probe requests or beaconing.
 * @IEEE80211_CHAN_PSD: Power spectral density (in dBm) is set for this
 *	channel.
 * @IEEE80211_CHAN_RADAR: Radar detection is required on this channel.
 * @IEEE80211_CHAN_NO_HT40PLUS: extension channel above this channel
 *	is not permitted.
 * @IEEE80211_CHAN_NO_HT40MINUS: extension channel below this channel
 *	is not permitted.
 * @IEEE80211_CHAN_NO_OFDM: OFDM is not allowed on this channel.
 * @IEEE80211_CHAN_NO_80MHZ: If the driver supports 80 MHz on the band,
 *	this flag indicates that an 80 MHz channel cannot use this
 *	channel as the control or any of the secondary channels.
 *	This may be due to the driver or due to regulatory bandwidth
 *	restrictions.
 * @IEEE80211_CHAN_NO_160MHZ: If the driver supports 160 MHz on the band,
 *	this flag indicates that an 160 MHz channel cannot use this
 *	channel as the control or any of the secondary channels.
 *	This may be due to the driver or due to regulatory bandwidth
 *	restrictions.
 * @IEEE80211_CHAN_INDOOR_ONLY: see %NL80211_FREQUENCY_ATTR_INDOOR_ONLY
 * @IEEE80211_CHAN_IR_CONCURRENT: see %NL80211_FREQUENCY_ATTR_IR_CONCURRENT
 * @IEEE80211_CHAN_NO_20MHZ: 20 MHz bandwidth is not permitted
 *	on this channel.
 * @IEEE80211_CHAN_NO_10MHZ: 10 MHz bandwidth is not permitted
 *	on this channel.
 * @IEEE80211_CHAN_NO_HE: HE operation is not permitted on this channel.
 * @IEEE80211_CHAN_NO_320MHZ: If the driver supports 320 MHz on the band,
 *	this flag indicates that a 320 MHz channel cannot use this
 *	channel as the control or any of the secondary channels.
 *	This may be due to the driver or due to regulatory bandwidth
 *	restrictions.
 * @IEEE80211_CHAN_NO_EHT: EHT operation is not permitted on this channel.
 * @IEEE80211_CHAN_DFS_CONCURRENT: See %NL80211_RRF_DFS_CONCURRENT
 * @IEEE80211_CHAN_NO_6GHZ_VLP_CLIENT: Client connection with VLP AP
 *	not permitted using this channel
 * @IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT: Client connection with AFC AP
 *	not permitted using this channel
 * @IEEE80211_CHAN_CAN_MONITOR: This channel can be used for monitor
 *	mode even in the presence of other (regulatory) restrictions,
 *	even if it is otherwise disabled.
 * @IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP: Allow using this channel for AP operation
 *	with very low power (VLP), even if otherwise set to NO_IR.
 * @IEEE80211_CHAN_ALLOW_20MHZ_ACTIVITY: Allow activity on a 20 MHz channel,
 *	even if otherwise set to NO_IR.
 * @IEEE80211_CHAN_S1G_NO_PRIMARY: Prevents the channel for use as an S1G
 *	primary channel. Does not prevent the wider operating channel
 *	described by the chandef from being used. In order for a 2MHz primary
 *	to be used, both 1MHz subchannels shall not contain this flag.
 * @IEEE80211_CHAN_NO_4MHZ: 4 MHz bandwidth is not permitted on this channel.
 * @IEEE80211_CHAN_NO_8MHZ: 8 MHz bandwidth is not permitted on this channel.
 * @IEEE80211_CHAN_NO_16MHZ: 16 MHz bandwidth is not permitted on this channel.
 * @IEEE80211_CHAN_NO_UHR: UHR operation is not permitted on this channel.
 */
enum ieee80211_channel_flags {
	IEEE80211_CHAN_DISABLED			= BIT(0),
	IEEE80211_CHAN_NO_IR			= BIT(1),
	IEEE80211_CHAN_PSD			= BIT(2),
	IEEE80211_CHAN_RADAR			= BIT(3),
	IEEE80211_CHAN_NO_HT40PLUS		= BIT(4),
	IEEE80211_CHAN_NO_HT40MINUS		= BIT(5),
	IEEE80211_CHAN_NO_OFDM			= BIT(6),
	IEEE80211_CHAN_NO_80MHZ			= BIT(7),
	IEEE80211_CHAN_NO_160MHZ		= BIT(8),
	IEEE80211_CHAN_INDOOR_ONLY		= BIT(9),
	IEEE80211_CHAN_IR_CONCURRENT		= BIT(10),
	IEEE80211_CHAN_NO_20MHZ			= BIT(11),
	IEEE80211_CHAN_NO_10MHZ			= BIT(12),
	IEEE80211_CHAN_NO_HE			= BIT(13),
	/* can use free bits here */
	IEEE80211_CHAN_NO_UHR			= BIT(18),
	IEEE80211_CHAN_NO_320MHZ		= BIT(19),
	IEEE80211_CHAN_NO_EHT			= BIT(20),
	IEEE80211_CHAN_DFS_CONCURRENT		= BIT(21),
	IEEE80211_CHAN_NO_6GHZ_VLP_CLIENT	= BIT(22),
	IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT	= BIT(23),
	IEEE80211_CHAN_CAN_MONITOR		= BIT(24),
	IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP	= BIT(25),
	IEEE80211_CHAN_ALLOW_20MHZ_ACTIVITY     = BIT(26),
	IEEE80211_CHAN_S1G_NO_PRIMARY		= BIT(27),
	IEEE80211_CHAN_NO_4MHZ			= BIT(28),
	IEEE80211_CHAN_NO_8MHZ			= BIT(29),
	IEEE80211_CHAN_NO_16MHZ			= BIT(30),
};

#define IEEE80211_CHAN_NO_HT40 \
	(IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS)

#define IEEE80211_DFS_MIN_CAC_TIME_MS		60000
#define IEEE80211_DFS_MIN_NOP_TIME_MS		(30 * 60 * 1000)

/**
 * struct ieee80211_channel - channel definition
 *
 * This structure describes a single channel for use
 * with cfg80211.
 *
 * @center_freq: center frequency in MHz
 * @freq_offset: offset from @center_freq, in KHz
 * @hw_value: hardware-specific value for the channel
 * @flags: channel flags from &enum ieee80211_channel_flags.
 * @orig_flags: channel flags at registration time, used by regulatory
 *	code to support devices with additional restrictions
 * @band: band this channel belongs to.
 * @max_antenna_gain: maximum antenna gain in dBi
 * @max_power: maximum transmission power (in dBm)
 * @max_reg_power: maximum regulatory transmission power (in dBm)
 * @beacon_found: helper to regulatory code to indicate when a beacon
 *	has been found on this channel. Use regulatory_hint_found_beacon()
 *	to enable this, this is useful only on 5 GHz band.
 * @orig_mag: internal use
 * @orig_mpwr: internal use
 * @dfs_state: current state of this channel. Only relevant if radar is required
 *	on this channel.
 * @dfs_state_entered: timestamp (jiffies) when the dfs state was entered.
 * @dfs_cac_ms: DFS CAC time in milliseconds, this is valid for DFS channels.
 * @psd: power spectral density (in dBm)
 */
struct ieee80211_channel {
	enum nl80211_band band;
	u32 center_freq;
	u16 freq_offset;
	u16 hw_value;
	u32 flags;
	int max_antenna_gain;
	int max_power;
	int max_reg_power;
	bool beacon_found;
	u32 orig_flags;
	int orig_mag, orig_mpwr;
	enum nl80211_dfs_state dfs_state;
	unsigned long dfs_state_entered;
	unsigned int dfs_cac_ms;
	s8 psd;
};

/**
 * enum ieee80211_rate_flags - rate flags
 *
 * Hardware/specification flags for rates. These are structured
 * in a way that allows using the same bitrate structure for
 * different bands/PHY modes.
 *
 * @IEEE80211_RATE_SHORT_PREAMBLE: Hardware can send with short
 *	preamble on this bitrate; only relevant in 2.4GHz band and
 *	with CCK rates.
 * @IEEE80211_RATE_MANDATORY_A: This bitrate is a mandatory rate
 *	when used with 802.11a (on the 5 GHz band); filled by the
 *	core code when registering the wiphy.
 * @IEEE80211_RATE_MANDATORY_B: This bitrate is a mandatory rate
 *	when used with 802.11b (on the 2.4 GHz band); filled by the
 *	core code when registering the wiphy.
 * @IEEE80211_RATE_MANDATORY_G: This bitrate is a mandatory rate
 *	when used with 802.11g (on the 2.4 GHz band); filled by the
 *	core code when registering the wiphy.
 * @IEEE80211_RATE_ERP_G: This is an ERP rate in 802.11g mode.
 * @IEEE80211_RATE_SUPPORTS_5MHZ: Rate can be used in 5 MHz mode
 * @IEEE80211_RATE_SUPPORTS_10MHZ: Rate can be used in 10 MHz mode
 */
enum ieee80211_rate_flags {
	IEEE80211_RATE_SHORT_PREAMBLE	= BIT(0),
	IEEE80211_RATE_MANDATORY_A	= BIT(1),
	IEEE80211_RATE_MANDATORY_B	= BIT(2),
	IEEE80211_RATE_MANDATORY_G	= BIT(3),
	IEEE80211_RATE_ERP_G		= BIT(4),
	IEEE80211_RATE_SUPPORTS_5MHZ	= BIT(5),
	IEEE80211_RATE_SUPPORTS_10MHZ	= BIT(6),
};

/**
 * enum ieee80211_bss_type - BSS type filter
 *
 * @IEEE80211_BSS_TYPE_ESS: Infrastructure BSS
 * @IEEE80211_BSS_TYPE_PBSS: Personal BSS
 * @IEEE80211_BSS_TYPE_IBSS: Independent BSS
 * @IEEE80211_BSS_TYPE_MBSS: Mesh BSS
 * @IEEE80211_BSS_TYPE_ANY: Wildcard value for matching any BSS type
 */
enum ieee80211_bss_type {
	IEEE80211_BSS_TYPE_ESS,
	IEEE80211_BSS_TYPE_PBSS,
	IEEE80211_BSS_TYPE_IBSS,
	IEEE80211_BSS_TYPE_MBSS,
	IEEE80211_BSS_TYPE_ANY
};

/**
 * enum ieee80211_privacy - BSS privacy filter
 *
 * @IEEE80211_PRIVACY_ON: privacy bit set
 * @IEEE80211_PRIVACY_OFF: privacy bit clear
 * @IEEE80211_PRIVACY_ANY: Wildcard value for matching any privacy setting
 */
enum ieee80211_privacy {
	IEEE80211_PRIVACY_ON,
	IEEE80211_PRIVACY_OFF,
	IEEE80211_PRIVACY_ANY
};

#define IEEE80211_PRIVACY(x)	\
	((x) ? IEEE80211_PRIVACY_ON : IEEE80211_PRIVACY_OFF)

/**
 * struct ieee80211_rate - bitrate definition
 *
 * This structure describes a bitrate that an 802.11 PHY can
 * operate with. The two values @hw_value and @hw_value_short
 * are only for driver use when pointers to this structure are
 * passed around.
 *
 * @flags: rate-specific flags from &enum ieee80211_rate_flags
 * @bitrate: bitrate in units of 100 Kbps
 * @hw_value: driver/hardware value for this rate
 * @hw_value_short: driver/hardware value for this rate when
 *	short preamble is used
 */
struct ieee80211_rate {
	u32 flags;
	u16 bitrate;
	u16 hw_value, hw_value_short;
};

/**
 * struct ieee80211_he_obss_pd - AP settings for spatial reuse
 *
 * @enable: is the feature enabled.
 * @sr_ctrl: The SR Control field of SRP element.
 * @non_srg_max_offset: non-SRG maximum tx power offset
 * @min_offset: minimal tx power offset an associated station shall use
 * @max_offset: maximum tx power offset an associated station shall use
 * @bss_color_bitmap: bitmap that indicates the BSS color values used by
 *	members of the SRG
 * @partial_bssid_bitmap: bitmap that indicates the partial BSSID values
 *	used by members of the SRG
 */
struct ieee80211_he_obss_pd {
	bool enable;
	u8 sr_ctrl;
	u8 non_srg_max_offset;
	u8 min_offset;
	u8 max_offset;
	u8 bss_color_bitmap[8];
	u8 partial_bssid_bitmap[8];
};

/**
 * struct cfg80211_he_bss_color - AP settings for BSS coloring
 *
 * @color: the current color.
 * @enabled: HE BSS color is used
 * @partial: define the AID equation.
 */
struct cfg80211_he_bss_color {
	u8 color;
	bool enabled;
	bool partial;
};

/**
 * struct ieee80211_sta_ht_cap - STA's HT capabilities
 *
 * This structure describes most essential parameters needed
 * to describe 802.11n HT capabilities for an STA.
 *
 * @ht_supported: is HT supported by the STA
 * @cap: HT capabilities map as described in 802.11n spec
 * @ampdu_factor: Maximum A-MPDU length factor
 * @ampdu_density: Minimum A-MPDU spacing
 * @mcs: Supported MCS rates
 */
struct ieee80211_sta_ht_cap {
	u16 cap; /* use IEEE80211_HT_CAP_ */
	bool ht_supported;
	u8 ampdu_factor;
	u8 ampdu_density;
	struct ieee80211_mcs_info mcs;
};

/**
 * struct ieee80211_sta_vht_cap - STA's VHT capabilities
 *
 * This structure describes most essential parameters needed
 * to describe 802.11ac VHT capabilities for an STA.
 *
 * @vht_supported: is VHT supported by the STA
 * @cap: VHT capabilities map as described in 802.11ac spec
 * @vht_mcs: Supported VHT MCS rates
 */
struct ieee80211_sta_vht_cap {
	bool vht_supported;
	u32 cap; /* use IEEE80211_VHT_CAP_ */
	struct ieee80211_vht_mcs_info vht_mcs;
};

#define IEEE80211_HE_PPE_THRES_MAX_LEN		25

/**
 * struct ieee80211_sta_he_cap - STA's HE capabilities
 *
 * This structure describes most essential parameters needed
 * to describe 802.11ax HE capabilities for a STA.
 *
 * @has_he: true iff HE data is valid.
 * @he_cap_elem: Fixed portion of the HE capabilities element.
 * @he_mcs_nss_supp: The supported NSS/MCS combinations.
 * @ppe_thres: Holds the PPE Thresholds data.
 */
struct ieee80211_sta_he_cap {
	bool has_he;
	struct ieee80211_he_cap_elem he_cap_elem;
	struct ieee80211_he_mcs_nss_supp he_mcs_nss_supp;
	u8 ppe_thres[IEEE80211_HE_PPE_THRES_MAX_LEN];
};

/**
 * struct ieee80211_eht_mcs_nss_supp - EHT max supported NSS per MCS
 *
 * See P802.11be_D1.3 Table 9-401k - "Subfields of the Supported EHT-MCS
 * and NSS Set field"
 *
 * @only_20mhz: MCS/NSS support for 20 MHz-only STA.
 * @bw: MCS/NSS support for 80, 160 and 320 MHz
 * @bw._80: MCS/NSS support for BW <= 80 MHz
 * @bw._160: MCS/NSS support for BW = 160 MHz
 * @bw._320: MCS/NSS support for BW = 320 MHz
 */
struct ieee80211_eht_mcs_nss_supp {
	union {
		struct ieee80211_eht_mcs_nss_supp_20mhz_only only_20mhz;
		struct {
			struct ieee80211_eht_mcs_nss_supp_bw _80;
			struct ieee80211_eht_mcs_nss_supp_bw _160;
			struct ieee80211_eht_mcs_nss_supp_bw _320;
		} __packed bw;
	} __packed;
} __packed;

#define IEEE80211_EHT_PPE_THRES_MAX_LEN		32

/**
 * struct ieee80211_sta_eht_cap - STA's EHT capabilities
 *
 * This structure describes most essential parameters needed
 * to describe 802.11be EHT capabilities for a STA.
 *
 * @has_eht: true iff EHT data is valid.
 * @eht_cap_elem: Fixed portion of the eht capabilities element.
 * @eht_mcs_nss_supp: The supported NSS/MCS combinations.
 * @eht_ppe_thres: Holds the PPE Thresholds data.
 */
struct ieee80211_sta_eht_cap {
	bool has_eht;
	struct ieee80211_eht_cap_elem_fixed eht_cap_elem;
	struct ieee80211_eht_mcs_nss_supp eht_mcs_nss_supp;
	u8 eht_ppe_thres[IEEE80211_EHT_PPE_THRES_MAX_LEN];
};

/**
 * struct ieee80211_sta_uhr_cap - STA's UHR capabilities
 * @has_uhr: true iff UHR is supported and data is valid
 * @mac: fixed MAC capabilities
 * @phy: fixed PHY capabilities
 */
struct ieee80211_sta_uhr_cap {
	bool has_uhr;
	struct ieee80211_uhr_cap_mac mac;
	struct ieee80211_uhr_cap_phy phy;
};

/* sparse defines __CHECKER__; see Documentation/dev-tools/sparse.rst */
#ifdef __CHECKER__
/*
 * This is used to mark the sband->iftype_data pointer which is supposed
 * to be an array with special access semantics (per iftype), but a lot
 * of code got it wrong in the past, so with this marking sparse will be
 * noisy when the pointer is used directly.
 */
# define __iftd		__attribute__((noderef, address_space(__iftype_data)))
#else
# define __iftd
#endif /* __CHECKER__ */

/**
 * struct ieee80211_sband_iftype_data - sband data per interface type
 *
 * This structure encapsulates sband data that is relevant for the
 * interface types defined in @types_mask.  Each type in the
 * @types_mask must be unique across all instances of iftype_data.
 *
 * @types_mask: interface types mask
 * @he_cap: holds the HE capabilities
 * @he_6ghz_capa: HE 6 GHz capabilities, must be filled in for a
 *	6 GHz band channel (and 0 may be valid value).
 * @eht_cap: STA's EHT capabilities
 * @uhr_cap: STA's UHR capabilities
 * @vendor_elems: vendor element(s) to advertise
 * @vendor_elems.data: vendor element(s) data
 * @vendor_elems.len: vendor element(s) length
 */
struct ieee80211_sband_iftype_data {
	u16 types_mask;
	struct ieee80211_sta_he_cap he_cap;
	struct ieee80211_he_6ghz_capa he_6ghz_capa;
	struct ieee80211_sta_eht_cap eht_cap;
	struct ieee80211_sta_uhr_cap uhr_cap;
	struct {
		const u8 *data;
		unsigned int len;
	} vendor_elems;
};

/**
 * enum ieee80211_edmg_bw_config - allowed channel bandwidth configurations
 *
 * @IEEE80211_EDMG_BW_CONFIG_4: 2.16GHz
 * @IEEE80211_EDMG_BW_CONFIG_5: 2.16GHz and 4.32GHz
 * @IEEE80211_EDMG_BW_CONFIG_6: 2.16GHz, 4.32GHz and 6.48GHz
 * @IEEE80211_EDMG_BW_CONFIG_7: 2.16GHz, 4.32GHz, 6.48GHz and 8.64GHz
 * @IEEE80211_EDMG_BW_CONFIG_8: 2.16GHz and 2.16GHz + 2.16GHz
 * @IEEE80211_EDMG_BW_CONFIG_9: 2.16GHz, 4.32GHz and 2.16GHz + 2.16GHz
 * @IEEE80211_EDMG_BW_CONFIG_10: 2.16GHz, 4.32GHz, 6.48GHz and 2.16GHz+2.16GHz
 * @IEEE80211_EDMG_BW_CONFIG_11: 2.16GHz, 4.32GHz, 6.48GHz, 8.64GHz and
 *	2.16GHz+2.16GHz
 * @IEEE80211_EDMG_BW_CONFIG_12: 2.16GHz, 2.16GHz + 2.16GHz and
 *	4.32GHz + 4.32GHz
 * @IEEE80211_EDMG_BW_CONFIG_13: 2.16GHz, 4.32GHz, 2.16GHz + 2.16GHz and
 *	4.32GHz + 4.32GHz
 * @IEEE80211_EDMG_BW_CONFIG_14: 2.16GHz, 4.32GHz, 6.48GHz, 2.16GHz + 2.16GHz
 *	and 4.32GHz + 4.32GHz
 * @IEEE80211_EDMG_BW_CONFIG_15: 2.16GHz, 4.32GHz, 6.48GHz, 8.64GHz,
 *	2.16GHz + 2.16GHz and 4.32GHz + 4.32GHz
 */
enum ieee80211_edmg_bw_config {
	IEEE80211_EDMG_BW_CONFIG_4	= 4,
	IEEE80211_EDMG_BW_CONFIG_5	= 5,
	IEEE80211_EDMG_BW_CONFIG_6	= 6,
	IEEE80211_EDMG_BW_CONFIG_7	= 7,
	IEEE80211_EDMG_BW_CONFIG_8	= 8,
	IEEE80211_EDMG_BW_CONFIG_9	= 9,
	IEEE80211_EDMG_BW_CONFIG_10	= 10,
	IEEE80211_EDMG_BW_CONFIG_11	= 11,
	IEEE80211_EDMG_BW_CONFIG_12	= 12,
	IEEE80211_EDMG_BW_CONFIG_13	= 13,
	IEEE80211_EDMG_BW_CONFIG_14	= 14,
	IEEE80211_EDMG_BW_CONFIG_15	= 15,
};

/**
 * struct ieee80211_edmg - EDMG configuration
 *
 * This structure describes most essential parameters needed
 * to describe 802.11ay EDMG configuration
 *
 * @channels: bitmap that indicates the 2.16 GHz channel(s)
 *	that are allowed to be used for transmissions.
 *	Bit 0 indicates channel 1, bit 1 indicates channel 2, etc.
 *	Set to 0 indicate EDMG not supported.
 * @bw_config: Channel BW Configuration subfield encodes
 *	the allowed channel bandwidth configurations
 */
struct ieee80211_edmg {
	u8 channels;
	enum ieee80211_edmg_bw_config bw_config;
};

/**
 * struct ieee80211_sta_s1g_cap - STA's S1G capabilities
 *
 * This structure describes most essential parameters needed
 * to describe 802.11ah S1G capabilities for a STA.
 *
 * @s1g: is STA an S1G STA
 * @cap: S1G capabilities information
 * @nss_mcs: Supported NSS MCS set
 */
struct ieee80211_sta_s1g_cap {
	bool s1g;
	u8 cap[10]; /* use S1G_CAPAB_ */
	u8 nss_mcs[5];
};

/**
 * struct ieee80211_supported_band - frequency band definition
 *
 * This structure describes a frequency band a wiphy
 * is able to operate in.
 *
 * @channels: Array of channels the hardware can operate with
 *	in this band.
 * @band: the band this structure represents
 * @n_channels: Number of channels in @channels
 * @bitrates: Array of bitrates the hardware can operate with
 *	in this band. Must be sorted to give a valid "supported
 *	rates" IE, i.e. CCK rates first, then OFDM.
 * @n_bitrates: Number of bitrates in @bitrates
 * @ht_cap: HT capabilities in this band
 * @vht_cap: VHT capabilities in this band
 * @s1g_cap: S1G capabilities in this band
 * @edmg_cap: EDMG capabilities in this band
 * @s1g_cap: S1G capabilities in this band (S1G band only, of course)
 * @n_iftype_data: number of iftype data entries
 * @iftype_data: interface type data entries.  Note that the bits in
 *	@types_mask inside this structure cannot overlap (i.e. only
 *	one occurrence of each type is allowed across all instances of
 *	iftype_data).
 */
struct ieee80211_supported_band {
	struct ieee80211_channel *channels;
	struct ieee80211_rate *bitrates;
	enum nl80211_band band;
	int n_channels;
	int n_bitrates;
	struct ieee80211_sta_ht_cap ht_cap;
	struct ieee80211_sta_vht_cap vht_cap;
	struct ieee80211_sta_s1g_cap s1g_cap;
	struct ieee80211_edmg edmg_cap;
	u16 n_iftype_data;
	const struct ieee80211_sband_iftype_data __iftd *iftype_data;
};

/**
 * _ieee80211_set_sband_iftype_data - set sband iftype data array
 * @sband: the sband to initialize
 * @iftd: the iftype data array pointer
 * @n_iftd: the length of the iftype data array
 *
 * Set the sband iftype data array; use this where the length cannot
 * be derived from the ARRAY_SIZE() of the argument, but prefer
 * ieee80211_set_sband_iftype_data() where it can be used.
 */
static inline void
_ieee80211_set_sband_iftype_data(struct ieee80211_supported_band *sband,
				 const struct ieee80211_sband_iftype_data *iftd,
				 u16 n_iftd)
{
	sband->iftype_data = (const void __iftd __force *)iftd;
	sband->n_iftype_data = n_iftd;
}

/**
 * ieee80211_set_sband_iftype_data - set sband iftype data array
 * @sband: the sband to initialize
 * @iftd: the iftype data array
 */
#define ieee80211_set_sband_iftype_data(sband, iftd)	\
	_ieee80211_set_sband_iftype_data(sband, iftd, ARRAY_SIZE(iftd))

/**
 * for_each_sband_iftype_data - iterate sband iftype data entries
 * @sband: the sband whose iftype_data array to iterate
 * @i: iterator counter
 * @iftd: iftype data pointer to set
 */
#define for_each_sband_iftype_data(sband, i, iftd)				\
	for (i = 0, iftd = (const void __force *)&(sband)->iftype_data[i];	\
	     i < (sband)->n_iftype_data;					\
	     i++, iftd = (const void __force *)&(sband)->iftype_data[i])

/**
 * ieee80211_get_sband_iftype_data - return sband data for a given iftype
 * @sband: the sband to search for the STA on
 * @iftype: enum nl80211_iftype
 *
 * Return: pointer to struct ieee80211_sband_iftype_data, or NULL is none found
 */
static inline const struct ieee80211_sband_iftype_data *
ieee80211_get_sband_iftype_data(const struct ieee80211_supported_band *sband,
				u8 iftype)
{
	const struct ieee80211_sband_iftype_data *data;
	int i;

	if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
		return NULL;

	if (iftype == NL80211_IFTYPE_AP_VLAN)
		iftype = NL80211_IFTYPE_AP;

	for_each_sband_iftype_data(sband, i, data) {
		if (data->types_mask & BIT(iftype))
			return data;
	}

	return NULL;
}

/**
 * ieee80211_get_he_iftype_cap - return HE capabilities for an sband's iftype
 * @sband: the sband to search for the iftype on
 * @iftype: enum nl80211_iftype
 *
 * Return: pointer to the struct ieee80211_sta_he_cap, or NULL is none found
 */
static inline const struct ieee80211_sta_he_cap *
ieee80211_get_he_iftype_cap(const struct ieee80211_supported_band *sband,
			    u8 iftype)
{
	const struct ieee80211_sband_iftype_data *data =
		ieee80211_get_sband_iftype_data(sband, iftype);

	if (data && data->he_cap.has_he)
		return &data->he_cap;

	return NULL;
}

/**
 * ieee80211_get_he_6ghz_capa - return HE 6 GHz capabilities
 * @sband: the sband to search for the STA on
 * @iftype: the iftype to search for
 *
 * Return: the 6GHz capabilities
 */
static inline __le16
ieee80211_get_he_6ghz_capa(const struct ieee80211_supported_band *sband,
			   enum nl80211_iftype iftype)
{
	const struct ieee80211_sband_iftype_data *data =
		ieee80211_get_sband_iftype_data(sband, iftype);

	if (WARN_ON(!data || !data->he_cap.has_he))
		return 0;

	return data->he_6ghz_capa.capa;
}

/**
 * ieee80211_get_eht_iftype_cap - return EHT capabilities for an sband's iftype
 * @sband: the sband to search for the iftype on
 * @iftype: enum nl80211_iftype
 *
 * Return: pointer to the struct ieee80211_sta_eht_cap, or NULL is none found
 */
static inline const struct ieee80211_sta_eht_cap *
ieee80211_get_eht_iftype_cap(const struct ieee80211_supported_band *sband,
			     enum nl80211_iftype iftype)
{
	const struct ieee80211_sband_iftype_data *data =
		ieee80211_get_sband_iftype_data(sband, iftype);

	if (data && data->eht_cap.has_eht)
		return &data->eht_cap;

	return NULL;
}

/**
 * ieee80211_get_uhr_iftype_cap - return UHR capabilities for an sband's iftype
 * @sband: the sband to search for the iftype on
 * @iftype: enum nl80211_iftype
 *
 * Return: pointer to the struct ieee80211_sta_uhr_cap, or NULL is none found
 */
static inline const struct ieee80211_sta_uhr_cap *
ieee80211_get_uhr_iftype_cap(const struct ieee80211_supported_band *sband,
			     enum nl80211_iftype iftype)
{
	const struct ieee80211_sband_iftype_data *data =
		ieee80211_get_sband_iftype_data(sband, iftype);

	if (data && data->uhr_cap.has_uhr)
		return &data->uhr_cap;

	return NULL;
}

/**
 * wiphy_read_of_freq_limits - read frequency limits from device tree
 *
 * @wiphy: the wireless device to get extra limits for
 *
 * Some devices may have extra limitations specified in DT. This may be useful
 * for chipsets that normally support more bands but are limited due to board
 * design (e.g. by antennas or external power amplifier).
 *
 * This function reads info from DT and uses it to *modify* channels (disable
 * unavailable ones). It's usually a *bad* idea to use it in drivers with
 * shared channel data as DT limitations are device specific. You should make
 * sure to call it only if channels in wiphy are copied and can be modified
 * without affecting other devices.
 *
 * As this function access device node it has to be called after set_wiphy_dev.
 * It also modifies channels so they have to be set first.
 * If using this helper, call it before wiphy_register().
 */
#ifdef CONFIG_OF
void wiphy_read_of_freq_limits(struct wiphy *wiphy);
#else /* CONFIG_OF */
static inline void wiphy_read_of_freq_limits(struct wiphy *wiphy)
{
}
#endif /* !CONFIG_OF */


/*
 * Wireless hardware/device configuration structures and methods
 */

/**
 * DOC: Actions and configuration
 *
 * Each wireless device and each virtual interface offer a set of configuration
 * operations and other actions that are invoked by userspace. Each of these
 * actions is described in the operations structure, and the parameters these
 * operations use are described separately.
 *
 * Additionally, some operations are asynchronous and expect to get status
 * information via some functions that drivers need to call.
 *
 * Scanning and BSS list handling with its associated functionality is described
 * in a separate chapter.
 */

#define VHT_MUMIMO_GROUPS_DATA_LEN (WLAN_MEMBERSHIP_LEN +\
				    WLAN_USER_POSITION_LEN)

/**
 * struct vif_params - describes virtual interface parameters
 * @flags: monitor interface flags, unchanged if 0, otherwise
 *	%MONITOR_FLAG_CHANGED will be set
 * @use_4addr: use 4-address frames
 * @macaddr: address to use for this virtual interface.
 *	If this parameter is set to zero address the driver may
 *	determine the address as needed.
 *	This feature is only fully supported by drivers that enable the
 *	%NL80211_FEATURE_MAC_ON_CREATE flag.  Others may support creating
 **	only p2p devices with specified MAC.
 * @vht_mumimo_groups: MU-MIMO groupID, used for monitoring MU-MIMO packets
 *	belonging to that MU-MIMO groupID; %NULL if not changed
 * @vht_mumimo_follow_addr: MU-MIMO follow address, used for monitoring
 *	MU-MIMO packets going to the specified station; %NULL if not changed
 */
struct vif_params {
	u32 flags;
	int use_4addr;
	u8 macaddr[ETH_ALEN];
	const u8 *vht_mumimo_groups;
	const u8 *vht_mumimo_follow_addr;
};

/**
 * struct key_params - key information
 *
 * Information about a key
 *
 * @key: key material
 * @key_len: length of key material
 * @cipher: cipher suite selector
 * @seq: sequence counter (IV/PN), must be in little endian,
 *	length given by @seq_len.
 * @seq_len: length of @seq.
 * @vlan_id: vlan_id for VLAN group key (if nonzero)
 * @mode: key install mode (RX_TX, NO_TX or SET_TX)
 */
struct key_params {
	const u8 *key;
	const u8 *seq;
	int key_len;
	int seq_len;
	u16 vlan_id;
	u32 cipher;
	enum nl80211_key_mode mode;
};

/**
 * struct cfg80211_chan_def - channel definition
 * @chan: the (control) channel
 * @width: channel width
 * @center_freq1: center frequency of first segment
 * @center_freq2: center frequency of second segment
 *	(only with 80+80 MHz)
 * @edmg: define the EDMG channels configuration.
 *	If edmg is requested (i.e. the .channels member is non-zero),
 *	chan will define the primary channel and all other
 *	parameters are ignored.
 * @freq1_offset: offset from @center_freq1, in KHz
 * @punctured: mask of the punctured 20 MHz subchannels, with
 *	bits turned on being disabled (punctured); numbered
 *	from lower to higher frequency (like in the spec)
 * @s1g_primary_2mhz: Indicates if the control channel pointed to
 *	by 'chan' exists as a 1MHz primary subchannel within an
 *	S1G 2MHz primary channel.
 */
struct cfg80211_chan_def {
	struct ieee80211_channel *chan;
	enum nl80211_chan_width width;
	u32 center_freq1;
	u32 center_freq2;
	struct ieee80211_edmg edmg;
	u16 freq1_offset;
	u16 punctured;
	bool s1g_primary_2mhz;
};

/*
 * cfg80211_bitrate_mask - masks for bitrate control
 */
struct cfg80211_bitrate_mask {
	struct {
		u32 legacy;
		u8 ht_mcs[IEEE80211_HT_MCS_MASK_LEN];
		u16 vht_mcs[NL80211_VHT_NSS_MAX];
		u16 he_mcs[NL80211_HE_NSS_MAX];
		u16 eht_mcs[NL80211_EHT_NSS_MAX];
		enum nl80211_txrate_gi gi;
		enum nl80211_he_gi he_gi;
		enum nl80211_eht_gi eht_gi;
		enum nl80211_he_ltf he_ltf;
		enum nl80211_eht_ltf eht_ltf;
	} control[NUM_NL80211_BANDS];
};


/**
 * struct cfg80211_tid_cfg - TID specific configuration
 * @config_override: Flag to notify driver to reset TID configuration
 *	of the peer.
 * @tids: bitmap of TIDs to modify
 * @mask: bitmap of attributes indicating which parameter changed,
 *	similar to &nl80211_tid_config_supp.
 * @noack: noack configuration value for the TID
 * @retry_long: retry count value
 * @retry_short: retry count value
 * @ampdu: Enable/Disable MPDU aggregation
 * @rtscts: Enable/Disable RTS/CTS
 * @amsdu: Enable/Disable MSDU aggregation
 * @txrate_type: Tx bitrate mask type
 * @txrate_mask: Tx bitrate to be applied for the TID
 */
struct cfg80211_tid_cfg {
	bool config_override;
	u8 tids;
	u64 mask;
	enum nl80211_tid_config noack;
	u8 retry_long, retry_short;
	enum nl80211_tid_config ampdu;
	enum nl80211_tid_config rtscts;
	enum nl80211_tid_config amsdu;
	enum nl80211_tx_rate_setting txrate_type;
	struct cfg80211_bitrate_mask txrate_mask;
};

/**
 * struct cfg80211_tid_config - TID configuration
 * @peer: Station's MAC address
 * @n_tid_conf: Number of TID specific configurations to be applied
 * @tid_conf: Configuration change info
 */
struct cfg80211_tid_config {
	const u8 *peer;
	u32 n_tid_conf;
	struct cfg80211_tid_cfg tid_conf[] __counted_by(n_tid_conf);
};

/**
 * struct cfg80211_fils_aad - FILS AAD data
 * @macaddr: STA MAC address
 * @kek: FILS KEK
 * @kek_len: FILS KEK length
 * @snonce: STA Nonce
 * @anonce: AP Nonce
 */
struct cfg80211_fils_aad {
	const u8 *macaddr;
	const u8 *kek;
	u8 kek_len;
	const u8 *snonce;
	const u8 *anonce;
};

/**
 * struct cfg80211_set_hw_timestamp - enable/disable HW timestamping
 * @macaddr: peer MAC address. NULL to enable/disable HW timestamping for all
 *	addresses.
 * @enable: if set, enable HW timestamping for the specified MAC address.
 *	Otherwise disable HW timestamping for the specified MAC address.
 */
struct cfg80211_set_hw_timestamp {
	const u8 *macaddr;
	bool enable;
};

/**
 * cfg80211_get_chandef_type - return old channel type from chandef
 * @chandef: the channel definition
 *
 * Return: The old channel type (NOHT, HT20, HT40+/-) from a given
 * chandef, which must have a bandwidth allowing this conversion.
 */
static inline enum nl80211_channel_type
cfg80211_get_chandef_type(const struct cfg80211_chan_def *chandef)
{
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_20_NOHT:
		return NL80211_CHAN_NO_HT;
	case NL80211_CHAN_WIDTH_20:
		return NL80211_CHAN_HT20;
	case NL80211_CHAN_WIDTH_40:
		if (chandef->center_freq1 > chandef->chan->center_freq)
			return NL80211_CHAN_HT40PLUS;
		return NL80211_CHAN_HT40MINUS;
	default:
		WARN_ON(1);
		return NL80211_CHAN_NO_HT;
	}
}

/**
 * cfg80211_chandef_create - create channel definition using channel type
 * @chandef: the channel definition struct to fill
 * @channel: the control channel
 * @chantype: the channel type
 *
 * Given a channel type, create a channel definition.
 */
void cfg80211_chandef_create(struct cfg80211_chan_def *chandef,
			     struct ieee80211_channel *channel,
			     enum nl80211_channel_type chantype);

/**
 * cfg80211_chandef_identical - check if two channel definitions are identical
 * @chandef1: first channel definition
 * @chandef2: second channel definition
 *
 * Return: %true if the channels defined by the channel definitions are
 * identical, %false otherwise.
 */
static inline bool
cfg80211_chandef_identical(const struct cfg80211_chan_def *chandef1,
			   const struct cfg80211_chan_def *chandef2)
{
	return (chandef1->chan == chandef2->chan &&
		chandef1->width == chandef2->width &&
		chandef1->center_freq1 == chandef2->center_freq1 &&
		chandef1->freq1_offset == chandef2->freq1_offset &&
		chandef1->center_freq2 == chandef2->center_freq2 &&
		chandef1->punctured == chandef2->punctured &&
		chandef1->s1g_primary_2mhz == chandef2->s1g_primary_2mhz);
}

/**
 * cfg80211_chandef_is_edmg - check if chandef represents an EDMG channel
 *
 * @chandef: the channel definition
 *
 * Return: %true if EDMG defined, %false otherwise.
 */
static inline bool
cfg80211_chandef_is_edmg(const struct cfg80211_chan_def *chandef)
{
	return chandef->edmg.channels || chandef->edmg.bw_config;
}

/**
 * cfg80211_chandef_is_s1g - check if chandef represents an S1G channel
 * @chandef: the channel definition
 *
 * Return: %true if S1G.
 */
static inline bool
cfg80211_chandef_is_s1g(const struct cfg80211_chan_def *chandef)
{
	return chandef->chan->band == NL80211_BAND_S1GHZ;
}

/**
 * cfg80211_chandef_compatible - check if two channel definitions are compatible
 * @chandef1: first channel definition
 * @chandef2: second channel definition
 *
 * Return: %NULL if the given channel definitions are incompatible,
 * chandef1 or chandef2 otherwise.
 */
const struct cfg80211_chan_def *
cfg80211_chandef_compatible(const struct cfg80211_chan_def *chandef1,
			    const struct cfg80211_chan_def *chandef2);


/**
 * nl80211_chan_width_to_mhz - get the channel width in MHz
 * @chan_width: the channel width from &enum nl80211_chan_width
 *
 * Return: channel width in MHz if the chan_width from &enum nl80211_chan_width
 * is valid. -1 otherwise.
 */
int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width);

/**
 * cfg80211_chandef_get_width - return chandef width in MHz
 * @c: chandef to return bandwidth for
 * Return: channel width in MHz for the given chandef; note that it returns
 *	80 for 80+80 configurations
 */
static inline int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c)
{
	return nl80211_chan_width_to_mhz(c->width);
}

/**
 * cfg80211_chandef_valid - check if a channel definition is valid
 * @chandef: the channel definition to check
 * Return: %true if the channel definition is valid. %false otherwise.
 */
bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef);

/**
 * cfg80211_chandef_usable - check if secondary channels can be used
 * @wiphy: the wiphy to validate against
 * @chandef: the channel definition to check
 * @prohibited_flags: the regulatory channel flags that must not be set
 * Return: %true if secondary channels are usable. %false otherwise.
 */
bool cfg80211_chandef_usable(struct wiphy *wiphy,
			     const struct cfg80211_chan_def *chandef,
			     u32 prohibited_flags);

/**
 * cfg80211_chandef_dfs_required - checks if radar detection is required
 * @wiphy: the wiphy to validate against
 * @chandef: the channel definition to check
 * @iftype: the interface type as specified in &enum nl80211_iftype
 * Returns:
 *	1 if radar detection is required, 0 if it is not, < 0 on error
 */
int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
				  const struct cfg80211_chan_def *chandef,
				  enum nl80211_iftype iftype);

/**
 * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable and we
 *				 can/need start CAC on such channel
 * @wiphy: the wiphy to validate against
 * @chandef: the channel definition to check
 *
 * Return: true if all channels available and at least
 *	   one channel requires CAC (NL80211_DFS_USABLE)
 */
bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy,
				 const struct cfg80211_chan_def *chandef);

/**
 * cfg80211_chandef_dfs_cac_time - get the DFS CAC time (in ms) for given
 *				   channel definition
 * @wiphy: the wiphy to validate against
 * @chandef: the channel definition to check
 *
 * Returns: DFS CAC time (in ms) which applies for this channel definition
 */
unsigned int
cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy,
			      const struct cfg80211_chan_def *chandef);

/**
 * cfg80211_chandef_primary - calculate primary 40/80/160 MHz freq
 * @chandef: chandef to calculate for
 * @primary_chan_width: primary channel width to calculate center for
 * @punctured: punctured sub-channel bitmap, will be recalculated
 *	according to the new bandwidth, can be %NULL
 *
 * Returns: the primary 40/80/160 MHz channel center frequency, or -1
 *	for errors, updating the punctured bitmap
 */
int cfg80211_chandef_primary(const struct cfg80211_chan_def *chandef,
			     enum nl80211_chan_width primary_chan_width,
			     u16 *punctured);

/**
 * nl80211_send_chandef - sends the channel definition.
 * @msg: the msg to send channel definition
 * @chandef: the channel definition to check
 *
 * Returns: 0 if sent the channel definition to msg, < 0 on error
 **/
int nl80211_send_chandef(struct sk_buff *msg, const struct cfg80211_chan_def *chandef);

/**
 * ieee80211_chandef_max_power - maximum transmission power for the chandef
 *
 * In some regulations, the transmit power may depend on the configured channel
 * bandwidth which may be defined as dBm/MHz. This function returns the actual
 * max_power for non-standard (20 MHz) channels.
 *
 * @chandef: channel definition for the channel
 *
 * Returns: maximum allowed transmission power in dBm for the chandef
 */
static inline int
ieee80211_chandef_max_power(struct cfg80211_chan_def *chandef)
{
	switch (chandef->width) {
	case NL80211_CHAN_WIDTH_5:
		return min(chandef->chan->max_reg_power - 6,
			   chandef->chan->max_power);
	case NL80211_CHAN_WIDTH_10:
		return min(chandef->chan->max_reg_power - 3,
			   chandef->chan->max_power);
	default:
		break;
	}
	return chandef->chan->max_power;
}

/**
 * cfg80211_any_usable_channels - check for usable channels
 * @wiphy: the wiphy to check for
 * @band_mask: which bands to check on
 * @prohibited_flags: which channels to not consider usable,
 *	%IEEE80211_CHAN_DISABLED is always taken into account
 *
 * Return: %true if usable channels found, %false otherwise
 */
bool cfg80211_any_usable_channels(struct wiphy *wiphy,
				  unsigned long band_mask,
				  u32 prohibited_flags);

/**
 * enum survey_info_flags - survey information flags
 *
 * @SURVEY_INFO_NOISE_DBM: noise (in dBm) was filled in
 * @SURVEY_INFO_IN_USE: channel is currently being used
 * @SURVEY_INFO_TIME: active time (in ms) was filled in
 * @SURVEY_INFO_TIME_BUSY: busy time was filled in
 * @SURVEY_INFO_TIME_EXT_BUSY: extension channel busy time was filled in
 * @SURVEY_INFO_TIME_RX: receive time was filled in
 * @SURVEY_INFO_TIME_TX: transmit time was filled in
 * @SURVEY_INFO_TIME_SCAN: scan time was filled in
 * @SURVEY_INFO_TIME_BSS_RX: local BSS receive time was filled in
 *
 * Used by the driver to indicate which info in &struct survey_info
 * it has filled in during the get_survey().
 */
enum survey_info_flags {
	SURVEY_INFO_NOISE_DBM		= BIT(0),
	SURVEY_INFO_IN_USE		= BIT(1),
	SURVEY_INFO_TIME		= BIT(2),
	SURVEY_INFO_TIME_BUSY		= BIT(3),
	SURVEY_INFO_TIME_EXT_BUSY	= BIT(4),
	SURVEY_INFO_TIME_RX		= BIT(5),
	SURVEY_INFO_TIME_TX		= BIT(6),
	SURVEY_INFO_TIME_SCAN		= BIT(7),
	SURVEY_INFO_TIME_BSS_RX		= BIT(8),
};

/**
 * struct survey_info - channel survey response
 *
 * @channel: the channel this survey record reports, may be %NULL for a single
 *	record to report global statistics
 * @filled: bitflag of flags from &enum survey_info_flags
 * @noise: channel noise in dBm. This and all following fields are
 *	optional
 * @time: amount of time in ms the radio was turn on (on the channel)
 * @time_busy: amount of time the primary channel was sensed busy
 * @time_ext_busy: amount of time the extension channel was sensed busy
 * @time_rx: amount of time the radio spent receiving data
 * @time_tx: amount of time the radio spent transmitting data
 * @time_scan: amount of time the radio spent for scanning
 * @time_bss_rx: amount of time the radio spent receiving data on a local BSS
 *
 * Used by dump_survey() to report back per-channel survey information.
 *
 * This structure can later be expanded with things like
 * channel duty cycle etc.
 */
struct survey_info {
	struct ieee80211_channel *channel;
	u64 time;
	u64 time_busy;
	u64 time_ext_busy;
	u64 time_rx;
	u64 time_tx;
	u64 time_scan;
	u64 time_bss_rx;
	u32 filled;
	s8 noise;
};

#define CFG80211_MAX_NUM_AKM_SUITES	10

/**
 * struct cfg80211_crypto_settings - Crypto settings
 * @wpa_versions: indicates which, if any, WPA versions are enabled
 *	(from enum nl80211_wpa_versions)
 * @cipher_group: group key cipher suite (or 0 if unset)
 * @n_ciphers_pairwise: number of AP supported unicast ciphers
 * @ciphers_pairwise: unicast key cipher suites
 * @n_akm_suites: number of AKM suites
 * @akm_suites: AKM suites
 * @control_port: Whether user space controls IEEE 802.1X port, i.e.,
 *	sets/clears %NL80211_STA_FLAG_AUTHORIZED. If true, the driver is
 *	required to assume that the port is unauthorized until authorized by
 *	user space. Otherwise, port is marked authorized by default.
 * @control_port_ethertype: the control port protocol that should be
 *	allowed through even on unauthorized ports
 * @control_port_no_encrypt: TRUE to prevent encryption of control port
 *	protocol frames.
 * @control_port_over_nl80211: TRUE if userspace expects to exchange control
 *	port frames over NL80211 instead of the network interface.
 * @control_port_no_preauth: disables pre-auth rx over the nl80211 control
 *	port for mac80211
 * @psk: PSK (for devices supporting 4-way-handshake offload)
 * @sae_pwd: password for SAE authentication (for devices supporting SAE
 *	offload)
 * @sae_pwd_len: length of SAE password (for devices supporting SAE offload)
 * @sae_pwe: The mechanisms allowed for SAE PWE derivation:
 *
 *	NL80211_SAE_PWE_UNSPECIFIED
 *	  Not-specified, used to indicate userspace did not specify any
 *	  preference. The driver should follow its internal policy in
 *	  such a scenario.
 *
 *	NL80211_SAE_PWE_HUNT_AND_PECK
 *	  Allow hunting-and-pecking loop only
 *
 *	NL80211_SAE_PWE_HASH_TO_ELEMENT
 *	  Allow hash-to-element only
 *
 *	NL80211_SAE_PWE_BOTH
 *	  Allow either hunting-and-pecking loop or hash-to-element
 */
struct cfg80211_crypto_settings {
	u32 wpa_versions;
	u32 cipher_group;
	int n_ciphers_pairwise;
	u32 ciphers_pairwise[NL80211_MAX_NR_CIPHER_SUITES];
	int n_akm_suites;
	u32 akm_suites[CFG80211_MAX_NUM_AKM_SUITES];
	bool control_port;
	__be16 control_port_ethertype;
	bool control_port_no_encrypt;
	bool control_port_over_nl80211;
	bool control_port_no_preauth;
	const u8 *psk;
	const u8 *sae_pwd;
	u8 sae_pwd_len;
	enum nl80211_sae_pwe_mechanism sae_pwe;
};

/**
 * struct cfg80211_mbssid_config - AP settings for multi bssid
 *
 * @tx_wdev: pointer to the transmitted interface in the MBSSID set
 * @tx_link_id: link ID of the transmitted profile in an MLD.
 * @index: index of this AP in the multi bssid group.
 * @ema: set to true if the beacons should be sent out in EMA mode.
 */
struct cfg80211_mbssid_config {
	struct wireless_dev *tx_wdev;
	u8 tx_link_id;
	u8 index;
	bool ema;
};

/**
 * struct cfg80211_mbssid_elems - Multiple BSSID elements
 *
 * @cnt: Number of elements in array %elems.
 *
 * @elem: Array of multiple BSSID element(s) to be added into Beacon frames.
 * @elem.data: Data for multiple BSSID elements.
 * @elem.len: Length of data.
 */
struct cfg80211_mbssid_elems {
	u8 cnt;
	struct {
		const u8 *data;
		size_t len;
	} elem[] __counted_by(cnt);
};

/**
 * struct cfg80211_rnr_elems - Reduced neighbor report (RNR) elements
 *
 * @cnt: Number of elements in array %elems.
 *
 * @elem: Array of RNR element(s) to be added into Beacon frames.
 * @elem.data: Data for RNR elements.
 * @elem.len: Length of data.
 */
struct cfg80211_rnr_elems {
	u8 cnt;
	struct {
		const u8 *data;
		size_t len;
	} elem[] __counted_by(cnt);
};

/**
 * struct cfg80211_beacon_data - beacon data
 * @link_id: the link ID for the AP MLD link sending this beacon
 * @head: head portion of beacon (before TIM IE)
 *	or %NULL if not changed
 * @tail: tail portion of beacon (after TIM IE)
 *	or %NULL if not changed
 * @head_len: length of @head
 * @tail_len: length of @tail
 * @beacon_ies: extra information element(s) to add into Beacon frames or %NULL
 * @beacon_ies_len: length of beacon_ies in octets
 * @proberesp_ies: extra information element(s) to add into Probe Response
 *	frames or %NULL
 * @proberesp_ies_len: length of proberesp_ies in octets
 * @assocresp_ies: extra information element(s) to add into (Re)Association
 *	Response frames or %NULL
 * @assocresp_ies_len: length of assocresp_ies in octets
 * @probe_resp_len: length of probe response template (@probe_resp)
 * @probe_resp: probe response template (AP mode only)
 * @mbssid_ies: multiple BSSID elements
 * @rnr_ies: reduced neighbor report elements
 * @ftm_responder: enable FTM responder functionality; -1 for no change
 *	(which also implies no change in LCI/civic location data)
 * @lci: Measurement Report element content, starting with Measurement Token
 *	(measurement type 8)
 * @civicloc: Measurement Report element content, starting with Measurement
 *	Token (measurement type 11)
 * @lci_len: LCI data length
 * @civicloc_len: Civic location data length
 * @he_bss_color: BSS Color settings
 * @he_bss_color_valid: indicates whether bss color
 *	attribute is present in beacon data or not.
 */
struct cfg80211_beacon_data {
	unsigned int link_id;

	const u8 *head, *tail;
	const u8 *beacon_ies;
	const u8 *proberesp_ies;
	const u8 *assocresp_ies;
	const u8 *probe_resp;
	const u8 *lci;
	const u8 *civicloc;
	struct cfg80211_mbssid_elems *mbssid_ies;
	struct cfg80211_rnr_elems *rnr_ies;
	s8 ftm_responder;

	size_t head_len, tail_len;
	size_t beacon_ies_len;
	size_t proberesp_ies_len;
	size_t assocresp_ies_len;
	size_t probe_resp_len;
	size_t lci_len;
	size_t civicloc_len;
	struct cfg80211_he_bss_color he_bss_color;
	bool he_bss_color_valid;
};

struct mac_address {
	u8 addr[ETH_ALEN];
};

/**
 * struct cfg80211_acl_data - Access control list data
 *
 * @acl_policy: ACL policy to be applied on the station's
 *	entry specified by mac_addr
 * @n_acl_entries: Number of MAC address entries passed
 * @mac_addrs: List of MAC addresses of stations to be used for ACL
 */
struct cfg80211_acl_data {
	enum nl80211_acl_policy acl_policy;
	int n_acl_entries;

	/* Keep it last */
	struct mac_address mac_addrs[] __counted_by(n_acl_entries);
};

/**
 * struct cfg80211_fils_discovery - FILS discovery parameters from
 * IEEE Std 802.11ai-2016, Annex C.3 MIB detail.
 *
 * @update: Set to true if the feature configuration should be updated.
 * @min_interval: Minimum packet interval in TUs (0 - 10000)
 * @max_interval: Maximum packet interval in TUs (0 - 10000)
 * @tmpl_len: Template length
 * @tmpl: Template data for FILS discovery frame including the action
 *	frame headers.
 */
struct cfg80211_fils_discovery {
	bool update;
	u32 min_interval;
	u32 max_interval;
	size_t tmpl_len;
	const u8 *tmpl;
};

/**
 * struct cfg80211_unsol_bcast_probe_resp - Unsolicited broadcast probe
 *	response parameters in 6GHz.
 *
 * @update: Set to true if the feature configuration should be updated.
 * @interval: Packet interval in TUs. Maximum allowed is 20 TU, as mentioned
 *	in IEEE P802.11ax/D6.0 26.17.2.3.2 - AP behavior for fast passive
 *	scanning
 * @tmpl_len: Template length
 * @tmpl: Template data for probe response
 */
struct cfg80211_unsol_bcast_probe_resp {
	bool update;
	u32 interval;
	size_t tmpl_len;
	const u8 *tmpl;
};

/**
 * struct cfg80211_s1g_short_beacon - S1G short beacon data.
 *
 * @update: Set to true if the feature configuration should be updated.
 * @short_head: Short beacon head.
 * @short_tail: Short beacon tail.
 * @short_head_len: Short beacon head len.
 * @short_tail_len: Short beacon tail len.
 */
struct cfg80211_s1g_short_beacon {
	bool update;
	const u8 *short_head;
	const u8 *short_tail;
	size_t short_head_len;
	size_t short_tail_len;
};

/**
 * struct cfg80211_ap_settings - AP configuration
 *
 * Used to configure an AP interface.
 *
 * @chandef: defines the channel to use
 * @beacon: beacon data
 * @beacon_interval: beacon interval
 * @dtim_period: DTIM period
 * @ssid: SSID to be used in the BSS (note: may be %NULL if not provided from
 *	user space)
 * @ssid_len: length of @ssid
 * @hidden_ssid: whether to hide the SSID in Beacon/Probe Response frames
 * @crypto: crypto settings
 * @privacy: the BSS uses privacy
 * @auth_type: Authentication type (algorithm)
 * @inactivity_timeout: time in seconds to determine station's inactivity.
 * @p2p_ctwindow: P2P CT Window
 * @p2p_opp_ps: P2P opportunistic PS
 * @acl: ACL configuration used by the drivers which has support for
 *	MAC address based access control
 * @pbss: If set, start as a PCP instead of AP. Relevant for DMG
 *	networks.
 * @beacon_rate: bitrate to be used for beacons
 * @ht_cap: HT capabilities (or %NULL if HT isn't enabled)
 * @vht_cap: VHT capabilities (or %NULL if VHT isn't enabled)
 * @he_cap: HE capabilities (or %NULL if HE isn't enabled)
 * @eht_cap: EHT capabilities (or %NULL if EHT isn't enabled)
 * @eht_oper: EHT operation IE (or %NULL if EHT isn't enabled)
 * @uhr_oper: UHR operation (or %NULL if UHR isn't enabled)
 * @ht_required: stations must support HT
 * @vht_required: stations must support VHT
 * @twt_responder: Enable Target Wait Time
 * @he_required: stations must support HE
 * @sae_h2e_required: stations must support direct H2E technique in SAE
 * @flags: flags, as defined in &enum nl80211_ap_settings_flags
 * @he_obss_pd: OBSS Packet Detection settings
 * @he_oper: HE operation IE (or %NULL if HE isn't enabled)
 * @fils_discovery: FILS discovery transmission parameters
 * @unsol_bcast_probe_resp: Unsolicited broadcast probe response parameters
 * @mbssid_config: AP settings for multiple bssid
 * @s1g_long_beacon_period: S1G long beacon period
 * @s1g_short_beacon: S1G short beacon data
 */
struct cfg80211_ap_settings {
	struct cfg80211_chan_def chandef;

	struct cfg80211_beacon_data beacon;

	int beacon_interval, dtim_period;
	const u8 *ssid;
	size_t ssid_len;
	enum nl80211_hidden_ssid hidden_ssid;
	struct cfg80211_crypto_settings crypto;
	bool privacy;
	enum nl80211_auth_type auth_type;
	int inactivity_timeout;
	u8 p2p_ctwindow;
	bool p2p_opp_ps;
	const struct cfg80211_acl_data *acl;
	bool pbss;
	struct cfg80211_bitrate_mask beacon_rate;

	const struct ieee80211_ht_cap *ht_cap;
	const struct ieee80211_vht_cap *vht_cap;
	const struct ieee80211_he_cap_elem *he_cap;
	const struct ieee80211_he_operation *he_oper;
	const struct ieee80211_eht_cap_elem *eht_cap;
	const struct ieee80211_eht_operation *eht_oper;
	const struct ieee80211_uhr_operation *uhr_oper;
	bool ht_required, vht_required, he_required, sae_h2e_required;
	bool twt_responder;
	u32 flags;
	struct ieee80211_he_obss_pd he_obss_pd;
	struct cfg80211_fils_discovery fils_discovery;
	struct cfg80211_unsol_bcast_probe_resp unsol_bcast_probe_resp;
	struct cfg80211_mbssid_config mbssid_config;
	u8 s1g_long_beacon_period;
	struct cfg80211_s1g_short_beacon s1g_short_beacon;
};


/**
 * struct cfg80211_ap_update - AP configuration update
 *
 * Subset of &struct cfg80211_ap_settings, for updating a running AP.
 *
 * @beacon: beacon data
 * @fils_discovery: FILS discovery transmission parameters
 * @unsol_bcast_probe_resp: Unsolicited broadcast probe response parameters
 * @s1g_short_beacon: S1G short beacon data
 */
struct cfg80211_ap_update {
	struct cfg80211_beacon_data beacon;
	struct cfg80211_fils_discovery fils_discovery;
	struct cfg80211_unsol_bcast_probe_resp unsol_bcast_probe_resp;
	struct cfg80211_s1g_short_beacon s1g_short_beacon;
};

/**
 * struct cfg80211_csa_settings - channel switch settings
 *
 * Used for channel switch
 *
 * @chandef: defines the channel to use after the switch
 * @beacon_csa: beacon data while performing the switch
 * @counter_offsets_beacon: offsets of the counters within the beacon (tail)
 * @counter_offsets_presp: offsets of the counters within the probe response
 * @n_counter_offsets_beacon: number of csa counters the beacon (tail)
 * @n_counter_offsets_presp: number of csa counters in the probe response
 * @beacon_after: beacon data to be used on the new channel
 * @unsol_bcast_probe_resp: Unsolicited broadcast probe response parameters
 * @radar_required: whether radar detection is required on the new channel
 * @block_tx: whether transmissions should be blocked while changing
 * @count: number of beacons until switch
 * @link_id: defines the link on which channel switch is expected during
 *	MLO. 0 in case of non-MLO.
 */
struct cfg80211_csa_settings {
	struct cfg80211_chan_def chandef;
	struct cfg80211_beacon_data beacon_csa;
	const u16 *counter_offsets_beacon;
	const u16 *counter_offsets_presp;
	unsigned int n_counter_offsets_beacon;
	unsigned int n_counter_offsets_presp;
	struct cfg80211_beacon_data beacon_after;
	struct cfg80211_unsol_bcast_probe_resp unsol_bcast_probe_resp;
	bool radar_required;
	bool block_tx;
	u8 count;
	u8 link_id;
};

/**
 * struct cfg80211_color_change_settings - color change settings
 *
 * Used for bss color change
 *
 * @beacon_color_change: beacon data while performing the color countdown
 * @counter_offset_beacon: offsets of the counters within the beacon (tail)
 * @counter_offset_presp: offsets of the counters within the probe response
 * @beacon_next: beacon data to be used after the color change
 * @unsol_bcast_probe_resp: Unsolicited broadcast probe response parameters
 * @count: number of beacons until the color change
 * @color: the color used after the change
 * @link_id: defines the link on which color change is expected during MLO.
 *	0 in case of non-MLO.
 */
struct cfg80211_color_change_settings {
	struct cfg80211_beacon_data beacon_color_change;
	u16 counter_offset_beacon;
	u16 counter_offset_presp;
	struct cfg80211_beacon_data beacon_next;
	struct cfg80211_unsol_bcast_probe_resp unsol_bcast_probe_resp;
	u8 count;
	u8 color;
	u8 link_id;
};

/**
 * struct iface_combination_params - input parameters for interface combinations
 *
 * Used to pass interface combination parameters
 *
 * @radio_idx: wiphy radio index or -1 for global
 * @num_different_channels: the number of different channels we want
 *	to use for verification
 * @radar_detect: a bitmap where each bit corresponds to a channel
 *	width where radar detection is needed, as in the definition of
 *	&struct ieee80211_iface_combination.@radar_detect_widths
 * @iftype_num: array with the number of interfaces of each interface
 *	type.  The index is the interface type as specified in &enum
 *	nl80211_iftype.
 * @new_beacon_int: set this to the beacon interval of a new interface
 *	that's not operating yet, if such is to be checked as part of
 *	the verification
 */
struct iface_combination_params {
	int radio_idx;
	int num_different_channels;
	u8 radar_detect;
	int iftype_num[NUM_NL80211_IFTYPES];
	u32 new_beacon_int;
};

/**
 * enum station_parameters_apply_mask - station parameter values to apply
 * @STATION_PARAM_APPLY_UAPSD: apply new uAPSD parameters (uapsd_queues, max_sp)
 * @STATION_PARAM_APPLY_CAPABILITY: apply new capability
 * @STATION_PARAM_APPLY_PLINK_STATE: apply new plink state
 *
 * Not all station parameters have in-band "no change" signalling,
 * for those that don't these flags will are used.
 */
enum station_parameters_apply_mask {
	STATION_PARAM_APPLY_UAPSD = BIT(0),
	STATION_PARAM_APPLY_CAPABILITY = BIT(1),
	STATION_PARAM_APPLY_PLINK_STATE = BIT(2),
};

/**
 * struct sta_txpwr - station txpower configuration
 *
 * Used to configure txpower for station.
 *
 * @power: tx power (in dBm) to be used for sending data traffic. If tx power
 *	is not provided, the default per-interface tx power setting will be
 *	overriding. Driver should be picking up the lowest tx power, either tx
 *	power per-interface or per-station.
 * @type: In particular if TPC %type is NL80211_TX_POWER_LIMITED then tx power
 *	will be less than or equal to specified from userspace, whereas if TPC
 *	%type is NL80211_TX_POWER_AUTOMATIC then it indicates default tx power.
 *	NL80211_TX_POWER_FIXED is not a valid configuration option for
 *	per peer TPC.
 */
struct sta_txpwr {
	s16 power;
	enum nl80211_tx_power_setting type;
};

/**
 * struct link_station_parameters - link station parameters
 *
 * Used to change and create a new link station.
 *
 * @mld_mac: MAC address of the station
 * @link_id: the link id (-1 for non-MLD station)
 * @link_mac: MAC address of the link
 * @supported_rates: supported rates in IEEE 802.11 format
 *	(or NULL for no change)
 * @supported_rates_len: number of supported rates
 * @ht_capa: HT capabilities of station
 * @vht_capa: VHT capabilities of station
 * @opmode_notif: operating mode field from Operating Mode Notification
 * @opmode_notif_used: information if operating mode field is used
 * @he_capa: HE capabilities of station
 * @he_capa_len: the length of the HE capabilities
 * @txpwr: transmit power for an associated station
 * @txpwr_set: txpwr field is set
 * @he_6ghz_capa: HE 6 GHz Band capabilities of station
 * @eht_capa: EHT capabilities of station
 * @eht_capa_len: the length of the EHT capabilities
 * @s1g_capa: S1G capabilities of station
 * @uhr_capa: UHR capabilities of the station
 * @uhr_capa_len: the length of the UHR capabilities
 */
struct link_station_parameters {
	const u8 *mld_mac;
	int link_id;
	const u8 *link_mac;
	const u8 *supported_rates;
	u8 supported_rates_len;
	const struct ieee80211_ht_cap *ht_capa;
	const struct ieee80211_vht_cap *vht_capa;
	u8 opmode_notif;
	bool opmode_notif_used;
	const struct ieee80211_he_cap_elem *he_capa;
	u8 he_capa_len;
	struct sta_txpwr txpwr;
	bool txpwr_set;
	const struct ieee80211_he_6ghz_capa *he_6ghz_capa;
	const struct ieee80211_eht_cap_elem *eht_capa;
	u8 eht_capa_len;
	const struct ieee80211_s1g_cap *s1g_capa;
	const struct ieee80211_uhr_cap *uhr_capa;
	u8 uhr_capa_len;
};

/**
 * struct link_station_del_parameters - link station deletion parameters
 *
 * Used to delete a link station entry (or all stations).
 *
 * @mld_mac: MAC address of the station
 * @link_id: the link id
 */
struct link_station_del_parameters {
	const u8 *mld_mac;
	u32 link_id;
};

/**
 * struct cfg80211_ttlm_params: TID to link mapping parameters
 *
 * Used for setting a TID to link mapping.
 *
 * @dlink: Downlink TID to link mapping, as defined in section 9.4.2.314
 *     (TID-To-Link Mapping element) in Draft P802.11be_D4.0.
 * @ulink: Uplink TID to link mapping, as defined in section 9.4.2.314
 *     (TID-To-Link Mapping element) in Draft P802.11be_D4.0.
 */
struct cfg80211_ttlm_params {
	u16 dlink[8];
	u16 ulink[8];
};

/**
 * struct station_parameters - station parameters
 *
 * Used to change and create a new station.
 *
 * @vlan: vlan interface station should belong to
 * @sta_flags_mask: station flags that changed
 *	(bitmask of BIT(%NL80211_STA_FLAG_...))
 * @sta_flags_set: station flags values
 *	(bitmask of BIT(%NL80211_STA_FLAG_...))
 * @listen_interval: listen interval or -1 for no change
 * @aid: AID or zero for no change
 * @vlan_id: VLAN ID for station (if nonzero)
 * @peer_aid: mesh peer AID or zero for no change
 * @plink_action: plink action to take
 * @plink_state: set the peer link state for a station
 * @uapsd_queues: bitmap of queues configured for uapsd. same format
 *	as the AC bitmap in the QoS info field
 * @max_sp: max Service Period. same format as the MAX_SP in the
 *	QoS info field (but already shifted down)
 * @sta_modify_mask: bitmap indicating which parameters changed
 *	(for those that don't have a natural "no change" value),
 *	see &enum station_parameters_apply_mask
 * @local_pm: local link-specific mesh power save mode (no change when set
 *	to unknown)
 * @capability: station capability
 * @ext_capab: extended capabilities of the station
 * @ext_capab_len: number of extended capabilities
 * @supported_channels: supported channels in IEEE 802.11 format
 * @supported_channels_len: number of supported channels
 * @supported_oper_classes: supported oper classes in IEEE 802.11 format
 * @supported_oper_classes_len: number of supported operating classes
 * @support_p2p_ps: information if station supports P2P PS mechanism
 * @airtime_weight: airtime scheduler weight for this station
 * @eml_cap_present: Specifies if EML capabilities field (@eml_cap) is
 *	present/updated
 * @eml_cap: EML capabilities of this station
 * @link_sta_params: link related params.
 * @epp_peer: EPP peer indication
 */
struct station_parameters {
	struct net_device *vlan;
	u32 sta_flags_mask, sta_flags_set;
	u32 sta_modify_mask;
	int listen_interval;
	u16 aid;
	u16 vlan_id;
	u16 peer_aid;
	u8 plink_action;
	u8 plink_state;
	u8 uapsd_queues;
	u8 max_sp;
	enum nl80211_mesh_power_mode local_pm;
	u16 capability;
	const u8 *ext_capab;
	u8 ext_capab_len;
	const u8 *supported_channels;
	u8 supported_channels_len;
	const u8 *supported_oper_classes;
	u8 supported_oper_classes_len;
	int support_p2p_ps;
	u16 airtime_weight;
	bool eml_cap_present;
	u16 eml_cap;
	struct link_station_parameters link_sta_params;
	bool epp_peer;
};

/**
 * struct station_del_parameters - station deletion parameters
 *
 * Used to delete a station entry (or all stations).
 *
 * @mac: MAC address of the station to remove or NULL to remove all stations
 * @subtype: Management frame subtype to use for indicating removal
 *	(10 = Disassociation, 12 = Deauthentication)
 * @reason_code: Reason code for the Disassociation/Deauthentication frame
 * @link_id: Link ID indicating a link that stations to be flushed must be
 *	using; valid only for MLO, but can also be -1 for MLO to really
 *	remove all stations.
 */
struct station_del_parameters {
	const u8 *mac;
	u8 subtype;
	u16 reason_code;
	int link_id;
};

/**
 * enum cfg80211_station_type - the type of station being modified
 * @CFG80211_STA_AP_CLIENT: client of an AP interface
 * @CFG80211_STA_AP_CLIENT_UNASSOC: client of an AP interface that is still
 *	unassociated (update properties for this type of client is permitted)
 * @CFG80211_STA_AP_MLME_CLIENT: client of an AP interface that has
 *	the AP MLME in the device
 * @CFG80211_STA_AP_STA: AP station on managed interface
 * @CFG80211_STA_IBSS: IBSS station
 * @CFG80211_STA_TDLS_PEER_SETUP: TDLS peer on managed interface (dummy entry
 *	while TDLS setup is in progress, it moves out of this state when
 *	being marked authorized; use this only if TDLS with external setup is
 *	supported/used)
 * @CFG80211_STA_TDLS_PEER_ACTIVE: TDLS peer on managed interface (active
 *	entry that is operating, has been marked authorized by userspace)
 * @CFG80211_STA_MESH_PEER_KERNEL: peer on mesh interface (kernel managed)
 * @CFG80211_STA_MESH_PEER_USER: peer on mesh interface (user managed)
 */
enum cfg80211_station_type {
	CFG80211_STA_AP_CLIENT,
	CFG80211_STA_AP_CLIENT_UNASSOC,
	CFG80211_STA_AP_MLME_CLIENT,
	CFG80211_STA_AP_STA,
	CFG80211_STA_IBSS,
	CFG80211_STA_TDLS_PEER_SETUP,
	CFG80211_STA_TDLS_PEER_ACTIVE,
	CFG80211_STA_MESH_PEER_KERNEL,
	CFG80211_STA_MESH_PEER_USER,
};

/**
 * cfg80211_check_station_change - validate parameter changes
 * @wiphy: the wiphy this operates on
 * @params: the new parameters for a station
 * @statype: the type of station being modified
 *
 * Utility function for the @change_station driver method. Call this function
 * with the appropriate station type looking up the station (and checking that
 * it exists). It will verify whether the station change is acceptable.
 *
 * Return: 0 if the change is acceptable, otherwise an error code. Note that
 * it may modify the parameters for backward compatibility reasons, so don't
 * use them before calling this.
 */
int cfg80211_check_station_change(struct wiphy *wiphy,
				  struct station_parameters *params,
				  enum cfg80211_station_type statype);

/**
 * enum rate_info_flags - bitrate info flags
 *
 * Used by the driver to indicate the specific rate transmission
 * type for 802.11n transmissions.
 *
 * @RATE_INFO_FLAGS_MCS: mcs field filled with HT MCS
 * @RATE_INFO_FLAGS_VHT_MCS: mcs field filled with VHT MCS
 * @RATE_INFO_FLAGS_SHORT_GI: 400ns guard interval
 * @RATE_INFO_FLAGS_DMG: 60GHz MCS
 * @RATE_INFO_FLAGS_HE_MCS: HE MCS information
 * @RATE_INFO_FLAGS_EDMG: 60GHz MCS in EDMG mode
 * @RATE_INFO_FLAGS_EXTENDED_SC_DMG: 60GHz extended SC MCS
 * @RATE_INFO_FLAGS_EHT_MCS: EHT MCS information
 * @RATE_INFO_FLAGS_S1G_MCS: MCS field filled with S1G MCS
 * @RATE_INFO_FLAGS_UHR_MCS: UHR MCS information
 * @RATE_INFO_FLAGS_UHR_ELR_MCS: UHR ELR MCS was used
 *	(set together with @RATE_INFO_FLAGS_UHR_MCS)
 * @RATE_INFO_FLAGS_UHR_IM: UHR Interference Mitigation
 *	was used
 */
enum rate_info_flags {
	RATE_INFO_FLAGS_MCS			= BIT(0),
	RATE_INFO_FLAGS_VHT_MCS			= BIT(1),
	RATE_INFO_FLAGS_SHORT_GI		= BIT(2),
	RATE_INFO_FLAGS_DMG			= BIT(3),
	RATE_INFO_FLAGS_HE_MCS			= BIT(4),
	RATE_INFO_FLAGS_EDMG			= BIT(5),
	RATE_INFO_FLAGS_EXTENDED_SC_DMG		= BIT(6),
	RATE_INFO_FLAGS_EHT_MCS			= BIT(7),
	RATE_INFO_FLAGS_S1G_MCS			= BIT(8),
	RATE_INFO_FLAGS_UHR_MCS			= BIT(9),
	RATE_INFO_FLAGS_UHR_ELR_MCS		= BIT(10),
	RATE_INFO_FLAGS_UHR_IM			= BIT(11),
};

/**
 * enum rate_info_bw - rate bandwidth information
 *
 * Used by the driver to indicate the rate bandwidth.
 *
 * @RATE_INFO_BW_5: 5 MHz bandwidth
 * @RATE_INFO_BW_10: 10 MHz bandwidth
 * @RATE_INFO_BW_20: 20 MHz bandwidth
 * @RATE_INFO_BW_40: 40 MHz bandwidth
 * @RATE_INFO_BW_80: 80 MHz bandwidth
 * @RATE_INFO_BW_160: 160 MHz bandwidth
 * @RATE_INFO_BW_HE_RU: bandwidth determined by HE RU allocation
 * @RATE_INFO_BW_320: 320 MHz bandwidth
 * @RATE_INFO_BW_EHT_RU: bandwidth determined by EHT/UHR RU allocation
 * @RATE_INFO_BW_1: 1 MHz bandwidth
 * @RATE_INFO_BW_2: 2 MHz bandwidth
 * @RATE_INFO_BW_4: 4 MHz bandwidth
 * @RATE_INFO_BW_8: 8 MHz bandwidth
 * @RATE_INFO_BW_16: 16 MHz bandwidth
 */
enum rate_info_bw {
	RATE_INFO_BW_20 = 0,
	RATE_INFO_BW_5,
	RATE_INFO_BW_10,
	RATE_INFO_BW_40,
	RATE_INFO_BW_80,
	RATE_INFO_BW_160,
	RATE_INFO_BW_HE_RU,
	RATE_INFO_BW_320,
	RATE_INFO_BW_EHT_RU,
	RATE_INFO_BW_1,
	RATE_INFO_BW_2,
	RATE_INFO_BW_4,
	RATE_INFO_BW_8,
	RATE_INFO_BW_16,
};

/**
 * struct rate_info - bitrate information
 *
 * Information about a receiving or transmitting bitrate
 *
 * @flags: bitflag of flags from &enum rate_info_flags
 * @legacy: bitrate in 100kbit/s for 802.11abg
 * @mcs: mcs index if struct describes an HT/VHT/HE/EHT/S1G/UHR rate
 * @nss: number of streams (VHT & HE only)
 * @bw: bandwidth (from &enum rate_info_bw)
 * @he_gi: HE guard interval (from &enum nl80211_he_gi)
 * @he_dcm: HE DCM value
 * @he_ru_alloc: HE RU allocation (from &enum nl80211_he_ru_alloc,
 *	only valid if bw is %RATE_INFO_BW_HE_RU)
 * @n_bonded_ch: In case of EDMG the number of bonded channels (1-4)
 * @eht_gi: EHT guard interval (from &enum nl80211_eht_gi)
 * @eht_ru_alloc: EHT RU allocation (from &enum nl80211_eht_ru_alloc,
 *	only valid if bw is %RATE_INFO_BW_EHT_RU)
 */
struct rate_info {
	u16 flags;
	u16 legacy;
	u8 mcs;
	u8 nss;
	u8 bw;
	u8 he_gi;
	u8 he_dcm;
	u8 he_ru_alloc;
	u8 n_bonded_ch;
	u8 eht_gi;
	u8 eht_ru_alloc;
};

/**
 * enum bss_param_flags - bitrate info flags
 *
 * Used by the driver to indicate the specific rate transmission
 * type for 802.11n transmissions.
 *
 * @BSS_PARAM_FLAGS_CTS_PROT: whether CTS protection is enabled
 * @BSS_PARAM_FLAGS_SHORT_PREAMBLE: whether short preamble is enabled
 * @BSS_PARAM_FLAGS_SHORT_SLOT_TIME: whether short slot time is enabled
 */
enum bss_param_flags {
	BSS_PARAM_FLAGS_CTS_PROT	= BIT(0),
	BSS_PARAM_FLAGS_SHORT_PREAMBLE	= BIT(1),
	BSS_PARAM_FLAGS_SHORT_SLOT_TIME	= BIT(2),
};

/**
 * struct sta_bss_parameters - BSS parameters for the attached station
 *
 * Information about the currently associated BSS
 *
 * @flags: bitflag of flags from &enum bss_param_flags
 * @dtim_period: DTIM period for the BSS
 * @beacon_interval: beacon interval
 */
struct sta_bss_parameters {
	u8 flags;
	u8 dtim_period;
	u16 beacon_interval;
};

/**
 * struct cfg80211_txq_stats - TXQ statistics for this TID
 * @filled: bitmap of flags using the bits of &enum nl80211_txq_stats to
 *	indicate the relevant values in this struct are filled
 * @backlog_bytes: total number of bytes currently backlogged
 * @backlog_packets: total number of packets currently backlogged
 * @flows: number of new flows seen
 * @drops: total number of packets dropped
 * @ecn_marks: total number of packets marked with ECN CE
 * @overlimit: number of drops due to queue space overflow
 * @overmemory: number of drops due to memory limit overflow
 * @collisions: number of hash collisions
 * @tx_bytes: total number of bytes dequeued
 * @tx_packets: total number of packets dequeued
 * @max_flows: maximum number of flows supported
 */
struct cfg80211_txq_stats {
	u32 filled;
	u32 backlog_bytes;
	u32 backlog_packets;
	u32 flows;
	u32 drops;
	u32 ecn_marks;
	u32 overlimit;
	u32 overmemory;
	u32 collisions;
	u32 tx_bytes;
	u32 tx_packets;
	u32 max_flows;
};

/**
 * struct cfg80211_tid_stats - per-TID statistics
 * @filled: bitmap of flags using the bits of &enum nl80211_tid_stats to
 *	indicate the relevant values in this struct are filled
 * @rx_msdu: number of received MSDUs
 * @tx_msdu: number of (attempted) transmitted MSDUs
 * @tx_msdu_retries: number of retries (not counting the first) for
 *	transmitted MSDUs
 * @tx_msdu_failed: number of failed transmitted MSDUs
 * @txq_stats: TXQ statistics
 */
struct cfg80211_tid_stats {
	u32 filled;
	u64 rx_msdu;
	u64 tx_msdu;
	u64 tx_msdu_retries;
	u64 tx_msdu_failed;
	struct cfg80211_txq_stats txq_stats;
};

#define IEEE80211_MAX_CHAINS	4

/**
 * struct link_station_info - link station information
 *
 * Link station information filled by driver for get_station() and
 *	dump_station().
 * @filled: bit flag of flags using the bits of &enum nl80211_sta_info to
 *	indicate the relevant values in this struct for them
 * @connected_time: time(in secs) since a link of station is last connected
 * @inactive_time: time since last activity for link station(tx/rx)
 *	in milliseconds
 * @assoc_at: bootime (ns) of the last association of link of station
 * @rx_bytes: bytes (size of MPDUs) received from this link of station
 * @tx_bytes: bytes (size of MPDUs) transmitted to this link of station
 * @signal: The signal strength, type depends on the wiphy's signal_type.
 *	For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_.
 * @signal_avg: Average signal strength, type depends on the wiphy's
 *	signal_type. For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_
 * @chains: bitmask for filled values in @chain_signal, @chain_signal_avg
 * @chain_signal: per-chain signal strength of last received packet in dBm
 * @chain_signal_avg: per-chain signal strength average in dBm
 * @txrate: current unicast bitrate from this link of station
 * @rxrate: current unicast bitrate to this link of station
 * @rx_packets: packets (MSDUs & MMPDUs) received from this link of station
 * @tx_packets: packets (MSDUs & MMPDUs) transmitted to this link of station
 * @tx_retries: cumulative retry counts (MPDUs) for this link of station
 * @tx_failed: number of failed transmissions (MPDUs) (retries exceeded, no ACK)
 * @rx_dropped_misc:  Dropped for un-specified reason.
 * @bss_param: current BSS parameters
 * @beacon_loss_count: Number of times beacon loss event has triggered.
 * @expected_throughput: expected throughput in kbps (including 802.11 headers)
 *	towards this station.
 * @rx_beacon: number of beacons received from this peer
 * @rx_beacon_signal_avg: signal strength average (in dBm) for beacons received
 *	from this peer
 * @rx_duration: aggregate PPDU duration(usecs) for all the frames from a peer
 * @tx_duration: aggregate PPDU duration(usecs) for all the frames to a peer
 * @airtime_weight: current airtime scheduling weight
 * @pertid: per-TID statistics, see &struct cfg80211_tid_stats, using the last
 *	(IEEE80211_NUM_TIDS) index for MSDUs not encapsulated in QoS-MPDUs.
 *	Note that this doesn't use the @filled bit, but is used if non-NULL.
 * @ack_signal: signal strength (in dBm) of the last ACK frame.
 * @avg_ack_signal: average rssi value of ack packet for the no of msdu's has
 *	been sent.
 * @rx_mpdu_count: number of MPDUs received from this station
 * @fcs_err_count: number of packets (MPDUs) received from this station with
 *	an FCS error. This counter should be incremented only when TA of the
 *	received packet with an FCS error matches the peer MAC address.
 * @addr: For MLO STA connection, filled with address of the link of station.
 */
struct link_station_info {
	u64 filled;
	u32 connected_time;
	u32 inactive_time;
	u64 assoc_at;
	u64 rx_bytes;
	u64 tx_bytes;
	s8 signal;
	s8 signal_avg;

	u8 chains;
	s8 chain_signal[IEEE80211_MAX_CHAINS];
	s8 chain_signal_avg[IEEE80211_MAX_CHAINS];

	struct rate_info txrate;
	struct rate_info rxrate;
	u32 rx_packets;
	u32 tx_packets;
	u32 tx_retries;
	u32 tx_failed;
	u32 rx_dropped_misc;
	struct sta_bss_parameters bss_param;

	u32 beacon_loss_count;

	u32 expected_throughput;

	u64 tx_duration;
	u64 rx_duration;
	u64 rx_beacon;
	u8 rx_beacon_signal_avg;

	u16 airtime_weight;

	s8 ack_signal;
	s8 avg_ack_signal;
	struct cfg80211_tid_stats *pertid;

	u32 rx_mpdu_count;
	u32 fcs_err_count;

	u8 addr[ETH_ALEN] __aligned(2);
};

/**
 * struct station_info - station information
 *
 * Station information filled by driver for get_station() and dump_station.
 *
 * @filled: bitflag of flags using the bits of &enum nl80211_sta_info to
 *	indicate the relevant values in this struct for them
 * @connected_time: time(in secs) since a station is last connected
 * @inactive_time: time since last station activity (tx/rx) in milliseconds
 * @assoc_at: bootime (ns) of the last association
 * @rx_bytes: bytes (size of MPDUs) received from this station
 * @tx_bytes: bytes (size of MPDUs) transmitted to this station
 * @signal: The signal strength, type depends on the wiphy's signal_type.
 *	For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_.
 * @signal_avg: Average signal strength, type depends on the wiphy's signal_type.
 *	For CFG80211_SIGNAL_TYPE_MBM, value is expressed in _dBm_.
 * @chains: bitmask for filled values in @chain_signal, @chain_signal_avg
 * @chain_signal: per-chain signal strength of last received packet in dBm
 * @chain_signal_avg: per-chain signal strength average in dBm
 * @txrate: current unicast bitrate from this station
 * @rxrate: current unicast bitrate to this station
 * @rx_packets: packets (MSDUs & MMPDUs) received from this station
 * @tx_packets: packets (MSDUs & MMPDUs) transmitted to this station
 * @tx_retries: cumulative retry counts (MPDUs)
 * @tx_failed: number of failed transmissions (MPDUs) (retries exceeded, no ACK)
 * @rx_dropped_misc:  Dropped for un-specified reason.
 * @bss_param: current BSS parameters
 * @generation: generation number for nl80211 dumps.
 *	This number should increase every time the list of stations
 *	changes, i.e. when a station is added or removed, so that
 *	userspace can tell whether it got a consistent snapshot.
 * @beacon_loss_count: Number of times beacon loss event has triggered.
 * @assoc_req_ies: IEs from (Re)Association Request.
 *	This is used only when in AP mode with drivers that do not use
 *	user space MLME/SME implementation. The information is provided for
 *	the cfg80211_new_sta() calls to notify user space of the IEs.
 * @assoc_req_ies_len: Length of assoc_req_ies buffer in octets.
 * @sta_flags: station flags mask & values
 * @t_offset: Time offset of the station relative to this host.
 * @llid: mesh local link id
 * @plid: mesh peer link id
 * @plink_state: mesh peer link state
 * @connected_to_gate: true if mesh STA has a path to mesh gate
 * @connected_to_as: true if mesh STA has a path to authentication server
 * @airtime_link_metric: mesh airtime link metric.
 * @local_pm: local mesh STA power save mode
 * @peer_pm: peer mesh STA power save mode
 * @nonpeer_pm: non-peer mesh STA power save mode
 * @expected_throughput: expected throughput in kbps (including 802.11 headers)
 *	towards this station.
 * @rx_beacon: number of beacons received from this peer
 * @rx_beacon_signal_avg: signal strength average (in dBm) for beacons received
 *	from this peer
 * @rx_duration: aggregate PPDU duration(usecs) for all the frames from a peer
 * @tx_duration: aggregate PPDU duration(usecs) for all the frames to a peer
 * @airtime_weight: current airtime scheduling weight
 * @pertid: per-TID statistics, see &struct cfg80211_tid_stats, using the last
 *	(IEEE80211_NUM_TIDS) index for MSDUs not encapsulated in QoS-MPDUs.
 *	Note that this doesn't use the @filled bit, but is used if non-NULL.
 * @ack_signal: signal strength (in dBm) of the last ACK frame.
 * @avg_ack_signal: average rssi value of ack packet for the no of msdu's has
 *	been sent.
 * @rx_mpdu_count: number of MPDUs received from this station
 * @fcs_err_count: number of packets (MPDUs) received from this station with
 *	an FCS error. This counter should be incremented only when TA of the
 *	received packet with an FCS error matches the peer MAC address.
 * @mlo_params_valid: Indicates @assoc_link_id and @mld_addr fields are filled
 *	by driver. Drivers use this only in cfg80211_new_sta() calls when AP
 *	MLD's MLME/SME is offload to driver. Drivers won't fill this
 *	information in cfg80211_del_sta_sinfo(), get_station() and
 *	dump_station() callbacks.
 * @assoc_link_id: Indicates MLO link ID of the AP, with which the station
 *	completed (re)association. This information filled for both MLO
 *	and non-MLO STA connections when the AP affiliated with an MLD.
 * @mld_addr: For MLO STA connection, filled with MLD address of the station.
 *	For non-MLO STA connection, filled with all zeros.
 * @assoc_resp_ies: IEs from (Re)Association Response.
 *	This is used only when in AP mode with drivers that do not use user
 *	space MLME/SME implementation. The information is provided only for the
 *	cfg80211_new_sta() calls to notify user space of the IEs. Drivers won't
 *	fill this information in cfg80211_del_sta_sinfo(), get_station() and
 *	dump_station() callbacks. User space needs this information to determine
 *	the accepted and rejected affiliated links of the connected station.
 * @assoc_resp_ies_len: Length of @assoc_resp_ies buffer in octets.
 * @valid_links: bitmap of valid links, or 0 for non-MLO. Drivers fill this
 *	information in cfg80211_new_sta(), cfg80211_del_sta_sinfo(),
 *	get_station() and dump_station() callbacks.
 * @links: reference to Link sta entries for MLO STA, all link specific
 *	information is accessed through links[link_id].
 */
struct station_info {
	u64 filled;
	u32 connected_time;
	u32 inactive_time;
	u64 assoc_at;
	u64 rx_bytes;
	u64 tx_bytes;
	s8 signal;
	s8 signal_avg;

	u8 chains;
	s8 chain_signal[IEEE80211_MAX_CHAINS];
	s8 chain_signal_avg[IEEE80211_MAX_CHAINS];

	struct rate_info txrate;
	struct rate_info rxrate;
	u32 rx_packets;
	u32 tx_packets;
	u32 tx_retries;
	u32 tx_failed;
	u32 rx_dropped_misc;
	struct sta_bss_parameters bss_param;
	struct nl80211_sta_flag_update sta_flags;

	int generation;

	u32 beacon_loss_count;

	const u8 *assoc_req_ies;
	size_t assoc_req_ies_len;

	s64 t_offset;
	u16 llid;
	u16 plid;
	u8 plink_state;
	u8 connected_to_gate;
	u8 connected_to_as;
	u32 airtime_link_metric;
	enum nl80211_mesh_power_mode local_pm;
	enum nl80211_mesh_power_mode peer_pm;
	enum nl80211_mesh_power_mode nonpeer_pm;

	u32 expected_throughput;

	u16 airtime_weight;

	s8 ack_signal;
	s8 avg_ack_signal;
	struct cfg80211_tid_stats *pertid;

	u64 tx_duration;
	u64 rx_duration;
	u64 rx_beacon;
	u8 rx_beacon_signal_avg;

	u32 rx_mpdu_count;
	u32 fcs_err_count;

	bool mlo_params_valid;
	u8 assoc_link_id;
	u8 mld_addr[ETH_ALEN] __aligned(2);
	const u8 *assoc_resp_ies;
	size_t assoc_resp_ies_len;

	u16 valid_links;
	struct link_station_info *links[IEEE80211_MLD_MAX_NUM_LINKS];
};

/**
 * struct cfg80211_sar_sub_specs - sub specs limit
 * @power: power limitation in 0.25dbm
 * @freq_range_index: index the power limitation applies to
 */
struct cfg80211_sar_sub_specs {
	s32 power;
	u32 freq_range_index;
};

/**
 * struct cfg80211_sar_specs - sar limit specs
 * @type: it's set with power in 0.25dbm or other types
 * @num_sub_specs: number of sar sub specs
 * @sub_specs: memory to hold the sar sub specs
 */
struct cfg80211_sar_specs {
	enum nl80211_sar_type type;
	u32 num_sub_specs;
	struct cfg80211_sar_sub_specs sub_specs[] __counted_by(num_sub_specs);
};


/**
 * struct cfg80211_sar_freq_ranges - sar frequency ranges
 * @start_freq:  start range edge frequency
 * @end_freq:    end range edge frequency
 */
struct cfg80211_sar_freq_ranges {
	u32 start_freq;
	u32 end_freq;
};

/**
 * struct cfg80211_sar_capa - sar limit capability
 * @type: it's set via power in 0.25dbm or other types
 * @num_freq_ranges: number of frequency ranges
 * @freq_ranges: memory to hold the freq ranges.
 *
 * Note: WLAN driver may append new ranges or split an existing
 * range to small ones and then append them.
 */
struct cfg80211_sar_capa {
	enum nl80211_sar_type type;
	u32 num_freq_ranges;
	const struct cfg80211_sar_freq_ranges *freq_ranges;
};

#if IS_ENABLED(CONFIG_CFG80211)
/**
 * cfg80211_get_station - retrieve information about a given station
 * @dev: the device where the station is supposed to be connected to
 * @mac_addr: the mac address of the station of interest
 * @sinfo: pointer to the structure to fill with the information
 *
 * Return: 0 on success and sinfo is filled with the available information
 * otherwise returns a negative error code and the content of sinfo has to be
 * considered undefined.
 */
int cfg80211_get_station(struct net_device *dev, const u8 *mac_addr,
			 struct station_info *sinfo);
#else
static inline int cfg80211_get_station(struct net_device *dev,
				       const u8 *mac_addr,
				       struct station_info *sinfo)
{
	return -ENOENT;
}
#endif

/**
 * enum monitor_flags - monitor flags
 *
 * Monitor interface configuration flags. Note that these must be the bits
 * according to the nl80211 flags.
 *
 * @MONITOR_FLAG_CHANGED: set if the flags were changed
 * @MONITOR_FLAG_FCSFAIL: pass frames with bad FCS
 * @MONITOR_FLAG_PLCPFAIL: pass frames with bad PLCP
 * @MONITOR_FLAG_CONTROL: pass control frames
 * @MONITOR_FLAG_OTHER_BSS: disable BSSID filtering
 * @MONITOR_FLAG_COOK_FRAMES: deprecated, will unconditionally be refused
 * @MONITOR_FLAG_ACTIVE: active monitor, ACKs frames on its MAC address
 * @MONITOR_FLAG_SKIP_TX: do not pass locally transmitted frames
 */
enum monitor_flags {
	MONITOR_FLAG_CHANGED		= BIT(__NL80211_MNTR_FLAG_INVALID),
	MONITOR_FLAG_FCSFAIL		= BIT(NL80211_MNTR_FLAG_FCSFAIL),
	MONITOR_FLAG_PLCPFAIL		= BIT(NL80211_MNTR_FLAG_PLCPFAIL),
	MONITOR_FLAG_CONTROL		= BIT(NL80211_MNTR_FLAG_CONTROL),
	MONITOR_FLAG_OTHER_BSS		= BIT(NL80211_MNTR_FLAG_OTHER_BSS),
	MONITOR_FLAG_COOK_FRAMES	= BIT(NL80211_MNTR_FLAG_COOK_FRAMES),
	MONITOR_FLAG_ACTIVE		= BIT(NL80211_MNTR_FLAG_ACTIVE),
	MONITOR_FLAG_SKIP_TX		= BIT(NL80211_MNTR_FLAG_SKIP_TX),
};

/**
 * enum mpath_info_flags -  mesh path information flags
 *
 * Used by the driver to indicate which info in &struct mpath_info it has filled
 * in during get_station() or dump_station().
 *
 * @MPATH_INFO_FRAME_QLEN: @frame_qlen filled
 * @MPATH_INFO_SN: @sn filled
 * @MPATH_INFO_METRIC: @metric filled
 * @MPATH_INFO_EXPTIME: @exptime filled
 * @MPATH_INFO_DISCOVERY_TIMEOUT: @discovery_timeout filled
 * @MPATH_INFO_DISCOVERY_RETRIES: @discovery_retries filled
 * @MPATH_INFO_FLAGS: @flags filled
 * @MPATH_INFO_HOP_COUNT: @hop_count filled
 * @MPATH_INFO_PATH_CHANGE: @path_change_count filled
 */
enum mpath_info_flags {
	MPATH_INFO_FRAME_QLEN		= BIT(0),
	MPATH_INFO_SN			= BIT(1),
	MPATH_INFO_METRIC		= BIT(2),
	MPATH_INFO_EXPTIME		= BIT(3),
	MPATH_INFO_DISCOVERY_TIMEOUT	= BIT(4),
	MPATH_INFO_DISCOVERY_RETRIES	= BIT(5),
	MPATH_INFO_FLAGS		= BIT(6),
	MPATH_INFO_HOP_COUNT		= BIT(7),
	MPATH_INFO_PATH_CHANGE		= BIT(8),
};

/**
 * struct mpath_info - mesh path information
 *
 * Mesh path information filled by driver for get_mpath() and dump_mpath().
 *
 * @filled: bitfield of flags from &enum mpath_info_flags
 * @frame_qlen: number of queued frames for this destination
 * @sn: target sequence number
 * @metric: metric (cost) of this mesh path
 * @exptime: expiration time for the mesh path from now, in msecs
 * @flags: mesh path flags from &enum mesh_path_flags
 * @discovery_timeout: total mesh path discovery timeout, in msecs
 * @discovery_retries: mesh path discovery retries
 * @generation: generation number for nl80211 dumps.
 *	This number should increase every time the list of mesh paths
 *	changes, i.e. when a station is added or removed, so that
 *	userspace can tell whether it got a consistent snapshot.
 * @hop_count: hops to destination
 * @path_change_count: total number of path changes to destination
 */
struct mpath_info {
	u32 filled;
	u32 frame_qlen;
	u32 sn;
	u32 metric;
	u32 exptime;
	u32 discovery_timeout;
	u8 discovery_retries;
	u8 flags;
	u8 hop_count;
	u32 path_change_count;

	int generation;
};

/**
 * enum wiphy_bss_param_flags - bit positions for supported bss parameters.
 *
 * @WIPHY_BSS_PARAM_CTS_PROT: support changing CTS protection.
 * @WIPHY_BSS_PARAM_SHORT_PREAMBLE: support changing short preamble usage.
 * @WIPHY_BSS_PARAM_SHORT_SLOT_TIME: support changing short slot time usage.
 * @WIPHY_BSS_PARAM_BASIC_RATES: support reconfiguring basic rates.
 * @WIPHY_BSS_PARAM_AP_ISOLATE: support changing AP isolation.
 * @WIPHY_BSS_PARAM_HT_OPMODE: support changing HT operating mode.
 * @WIPHY_BSS_PARAM_P2P_CTWINDOW: support reconfiguring ctwindow.
 * @WIPHY_BSS_PARAM_P2P_OPPPS: support changing P2P opportunistic power-save.
 */
enum wiphy_bss_param_flags {
	WIPHY_BSS_PARAM_CTS_PROT = BIT(0),
	WIPHY_BSS_PARAM_SHORT_PREAMBLE = BIT(1),
	WIPHY_BSS_PARAM_SHORT_SLOT_TIME = BIT(2),
	WIPHY_BSS_PARAM_BASIC_RATES = BIT(3),
	WIPHY_BSS_PARAM_AP_ISOLATE = BIT(4),
	WIPHY_BSS_PARAM_HT_OPMODE = BIT(5),
	WIPHY_BSS_PARAM_P2P_CTWINDOW = BIT(6),
	WIPHY_BSS_PARAM_P2P_OPPPS = BIT(7),
};

/**
 * struct bss_parameters - BSS parameters
 *
 * Used to change BSS parameters (mainly for AP mode).
 *
 * @link_id: link_id or -1 for non-MLD
 * @use_cts_prot: Whether to use CTS protection
 *	(0 = no, 1 = yes, -1 = do not change)
 * @use_short_preamble: Whether the use of short preambles is allowed
 *	(0 = no, 1 = yes, -1 = do not change)
 * @use_short_slot_time: Whether the use of short slot time is allowed
 *	(0 = no, 1 = yes, -1 = do not change)
 * @basic_rates: basic rates in IEEE 802.11 format
 *	(or NULL for no change)
 * @basic_rates_len: number of basic rates
 * @ap_isolate: do not forward packets between connected stations
 *	(0 = no, 1 = yes, -1 = do not change)
 * @ht_opmode: HT Operation mode
 *	(u16 = opmode, -1 = do not change)
 * @p2p_ctwindow: P2P CT Window (-1 = no change)
 * @p2p_opp_ps: P2P opportunistic PS (-1 = no change)
 */
struct bss_parameters {
	int link_id;
	int use_cts_prot;
	int use_short_preamble;
	int use_short_slot_time;
	const u8 *basic_rates;
	u8 basic_rates_len;
	int ap_isolate;
	int ht_opmode;
	s8 p2p_ctwindow, p2p_opp_ps;
};

/**
 * struct mesh_config - 802.11s mesh configuration
 *
 * These parameters can be changed while the mesh is active.
 *
 * @dot11MeshRetryTimeout: the initial retry timeout in millisecond units used
 *	by the Mesh Peering Open message
 * @dot11MeshConfirmTimeout: the initial retry timeout in millisecond units
 *	used by the Mesh Peering Open message
 * @dot11MeshHoldingTimeout: the confirm timeout in millisecond units used by
 *	the mesh peering management to close a mesh peering
 * @dot11MeshMaxPeerLinks: the maximum number of peer links allowed on this
 *	mesh interface
 * @dot11MeshMaxRetries: the maximum number of peer link open retries that can
 *	be sent to establish a new peer link instance in a mesh
 * @dot11MeshTTL: the value of TTL field set at a source mesh STA
 * @element_ttl: the value of TTL field set at a mesh STA for path selection
 *	elements
 * @auto_open_plinks: whether we should automatically open peer links when we
 *	detect compatible mesh peers
 * @dot11MeshNbrOffsetMaxNeighbor: the maximum number of neighbors to
 *	synchronize to for 11s default synchronization method
 * @dot11MeshHWMPmaxPREQretries: the number of action frames containing a PREQ
 *	that an originator mesh STA can send to a particular path target
 * @path_refresh_time: how frequently to refresh mesh paths in milliseconds
 * @min_discovery_timeout: the minimum length of time to wait until giving up on
 *	a path discovery in milliseconds
 * @dot11MeshHWMPactivePathTimeout: the time (in TUs) for which mesh STAs
 *	receiving a PREQ shall consider the forwarding information from the
 *	root to be valid. (TU = time unit)
 * @dot11MeshHWMPpreqMinInterval: the minimum interval of time (in TUs) during
 *	which a mesh STA can send only one action frame containing a PREQ
 *	element
 * @dot11MeshHWMPperrMinInterval: the minimum interval of time (in TUs) during
 *	which a mesh STA can send only one Action frame containing a PERR
 *	element
 * @dot11MeshHWMPnetDiameterTraversalTime: the interval of time (in TUs) that
 *	it takes for an HWMP information element to propagate across the mesh
 * @dot11MeshHWMPRootMode: the configuration of a mesh STA as root mesh STA
 * @dot11MeshHWMPRannInterval: the interval of time (in TUs) between root
 *	announcements are transmitted
 * @dot11MeshGateAnnouncementProtocol: whether to advertise that this mesh
 *	station has access to a broader network beyond the MBSS. (This is
 *	missnamed in draft 12.0: dot11MeshGateAnnouncementProtocol set to true
 *	only means that the station will announce others it's a mesh gate, but
 *	not necessarily using the gate announcement protocol. Still keeping the
 *	same nomenclature to be in sync with the spec)
 * @dot11MeshForwarding: whether the Mesh STA is forwarding or non-forwarding
 *	entity (default is TRUE - forwarding entity)
 * @rssi_threshold: the threshold for average signal strength of candidate
 *	station to establish a peer link
 * @ht_opmode: mesh HT protection mode
 *
 * @dot11MeshHWMPactivePathToRootTimeout: The time (in TUs) for which mesh STAs
 *	receiving a proactive PREQ shall consider the forwarding information to
 *	the root mesh STA to be valid.
 *
 * @dot11MeshHWMProotInterval: The interval of time (in TUs) between proactive
 *	PREQs are transmitted.
 * @dot11MeshHWMPconfirmationInterval: The minimum interval of time (in TUs)
 *	during which a mesh STA can send only one Action frame containing
 *	a PREQ element for root path confirmation.
 * @power_mode: The default mesh power save mode which will be the initial
 *	setting for new peer links.
 * @dot11MeshAwakeWindowDuration: The duration in TUs the STA will remain awake
 *	after transmitting its beacon.
 * @plink_timeout: If no tx activity is seen from a STA we've established
 *	peering with for longer than this time (in seconds), then remove it
 *	from the STA's list of peers.  Default is 30 minutes.
 * @dot11MeshConnectedToAuthServer: if set to true then this mesh STA
 *	will advertise that it is connected to a authentication server
 *	in the mesh formation field.
 * @dot11MeshConnectedToMeshGate: if set to true, advertise that this STA is
 *      connected to a mesh gate in mesh formation info.  If false, the
 *      value in mesh formation is determined by the presence of root paths
 *      in the mesh path table
 * @dot11MeshNolearn: Try to avoid multi-hop path discovery (e.g. PREQ/PREP
 *      for HWMP) if the destination is a direct neighbor. Note that this might
 *      not be the optimal decision as a multi-hop route might be better. So
 *      if using this setting you will likely also want to disable
 *      dot11MeshForwarding and use another mesh routing protocol on top.
 */
struct mesh_config {
	u16 dot11MeshRetryTimeout;
	u16 dot11MeshConfirmTimeout;
	u16 dot11MeshHoldingTimeout;
	u16 dot11MeshMaxPeerLinks;
	u8 dot11MeshMaxRetries;
	u8 dot11MeshTTL;
	u8 element_ttl;
	bool auto_open_plinks;
	u32 dot11MeshNbrOffsetMaxNeighbor;
	u8 dot11MeshHWMPmaxPREQretries;
	u32 path_refresh_time;
	u16 min_discovery_timeout;
	u32 dot11MeshHWMPactivePathTimeout;
	u16 dot11MeshHWMPpreqMinInterval;
	u16 dot11MeshHWMPperrMinInterval;
	u16 dot11MeshHWMPnetDiameterTraversalTime;
	u8 dot11MeshHWMPRootMode;
	bool dot11MeshConnectedToMeshGate;
	bool dot11MeshConnectedToAuthServer;
	u16 dot11MeshHWMPRannInterval;
	bool dot11MeshGateAnnouncementProtocol;
	bool dot11MeshForwarding;
	s32 rssi_threshold;
	u16 ht_opmode;
	u32 dot11MeshHWMPactivePathToRootTimeout;
	u16 dot11MeshHWMProotInterval;
	u16 dot11MeshHWMPconfirmationInterval;
	enum nl80211_mesh_power_mode power_mode;
	u16 dot11MeshAwakeWindowDuration;
	u32 plink_timeout;
	bool dot11MeshNolearn;
};

/**
 * struct mesh_setup - 802.11s mesh setup configuration
 * @chandef: defines the channel to use
 * @mesh_id: the mesh ID
 * @mesh_id_len: length of the mesh ID, at least 1 and at most 32 bytes
 * @sync_method: which synchronization method to use
 * @path_sel_proto: which path selection protocol to use
 * @path_metric: which metric to use
 * @auth_id: which authentication method this mesh is using
 * @ie: vendor information elements (optional)
 * @ie_len: length of vendor information elements
 * @is_authenticated: this mesh requires authentication
 * @is_secure: this mesh uses security
 * @user_mpm: userspace handles all MPM functions
 * @dtim_period: DTIM period to use
 * @beacon_interval: beacon interval to use
 * @mcast_rate: multicast rate for Mesh Node [6Mbps is the default for 802.11a]
 * @basic_rates: basic rates to use when creating the mesh
 * @beacon_rate: bitrate to be used for beacons
 * @userspace_handles_dfs: whether user space controls DFS operation, i.e.
 *	changes the channel when a radar is detected. This is required
 *	to operate on DFS channels.
 * @control_port_over_nl80211: TRUE if userspace expects to exchange control
 *	port frames over NL80211 instead of the network interface.
 *
 * These parameters are fixed when the mesh is created.
 */
struct mesh_setup {
	struct cfg80211_chan_def chandef;
	const u8 *mesh_id;
	u8 mesh_id_len;
	u8 sync_method;
	u8 path_sel_proto;
	u8 path_metric;
	u8 auth_id;
	const u8 *ie;
	u8 ie_len;
	bool is_authenticated;
	bool is_secure;
	bool user_mpm;
	u8 dtim_period;
	u16 beacon_interval;
	int mcast_rate[NUM_NL80211_BANDS];
	u32 basic_rates;
	struct cfg80211_bitrate_mask beacon_rate;
	bool userspace_handles_dfs;
	bool control_port_over_nl80211;
};

/**
 * struct ocb_setup - 802.11p OCB mode setup configuration
 * @chandef: defines the channel to use
 *
 * These parameters are fixed when connecting to the network
 */
struct ocb_setup {
	struct cfg80211_chan_def chandef;
};

/**
 * struct ieee80211_txq_params - TX queue parameters
 * @ac: AC identifier
 * @txop: Maximum burst time in units of 32 usecs, 0 meaning disabled
 * @cwmin: Minimum contention window [a value of the form 2^n-1 in the range
 *	1..32767]
 * @cwmax: Maximum contention window [a value of the form 2^n-1 in the range
 *	1..32767]
 * @aifs: Arbitration interframe space [0..255]
 * @link_id: link_id or -1 for non-MLD
 */
struct ieee80211_txq_params {
	enum nl80211_ac ac;
	u16 txop;
	u16 cwmin;
	u16 cwmax;
	u8 aifs;
	int link_id;
};

/**
 * DOC: Scanning and BSS list handling
 *
 * The scanning process itself is fairly simple, but cfg80211 offers quite
 * a bit of helper functionality. To start a scan, the scan operation will
 * be invoked with a scan definition. This scan definition contains the
 * channels to scan, and the SSIDs to send probe requests for (including the
 * wildcard, if desired). A passive scan is indicated by having no SSIDs to
 * probe. Additionally, a scan request may contain extra information elements
 * that should be added to the probe request. The IEs are guaranteed to be
 * well-formed, and will not exceed the maximum length the driver advertised
 * in the wiphy structure.
 *
 * When scanning finds a BSS, cfg80211 needs to be notified of that, because
 * it is responsible for maintaining the BSS list; the driver should not
 * maintain a list itself. For this notification, various functions exist.
 *
 * Since drivers do not maintain a BSS list, there are also a number of
 * functions to search for a BSS and obtain information about it from the
 * BSS structure cfg80211 maintains. The BSS list is also made available
 * to userspace.
 */

/**
 * struct cfg80211_ssid - SSID description
 * @ssid: the SSID
 * @ssid_len: length of the ssid
 */
struct cfg80211_ssid {
	u8 ssid[IEEE80211_MAX_SSID_LEN];
	u8 ssid_len;
};

/**
 * struct cfg80211_scan_info - information about completed scan
 * @scan_start_tsf: scan start time in terms of the TSF of the BSS that the
 *	wireless device that requested the scan is connected to. If this
 *	information is not available, this field is left zero.
 * @tsf_bssid: the BSSID according to which %scan_start_tsf is set.
 * @aborted: set to true if the scan was aborted for any reason,
 *	userspace will be notified of that
 */
struct cfg80211_scan_info {
	u64 scan_start_tsf;
	u8 tsf_bssid[ETH_ALEN] __aligned(2);
	bool aborted;
};

/**
 * struct cfg80211_scan_6ghz_params - relevant for 6 GHz only
 *
 * @short_ssid: short ssid to scan for
 * @bssid: bssid to scan for
 * @channel_idx: idx of the channel in the channel array in the scan request
 *	 which the above info is relevant to
 * @unsolicited_probe: the AP transmits unsolicited probe response every 20 TU
 * @short_ssid_valid: @short_ssid is valid and can be used
 * @psc_no_listen: when set, and the channel is a PSC channel, no need to wait
 *       20 TUs before starting to send probe requests.
 * @psd_20: The AP's 20 MHz PSD value.
 */
struct cfg80211_scan_6ghz_params {
	u32 short_ssid;
	u32 channel_idx;
	u8 bssid[ETH_ALEN];
	bool unsolicited_probe;
	bool short_ssid_valid;
	bool psc_no_listen;
	s8 psd_20;
};

/**
 * struct cfg80211_scan_request - scan request description
 *
 * @ssids: SSIDs to scan for (active scan only)
 * @n_ssids: number of SSIDs
 * @channels: channels to scan on.
 * @n_channels: total number of channels to scan
 * @ie: optional information element(s) to add into Probe Request or %NULL
 * @ie_len: length of ie in octets
 * @duration: how long to listen on each channel, in TUs. If
 *	%duration_mandatory is not set, this is the maximum dwell time and
 *	the actual dwell time may be shorter.
 * @duration_mandatory: if set, the scan duration must be as specified by the
 *	%duration field.
 * @flags: control flags from &enum nl80211_scan_flags
 * @rates: bitmap of rates to advertise for each band
 * @wiphy: the wiphy this was for
 * @scan_start: time (in jiffies) when the scan started
 * @wdev: the wireless device to scan for
 * @no_cck: used to send probe requests at non CCK rate in 2GHz band
 * @mac_addr: MAC address used with randomisation
 * @mac_addr_mask: MAC address mask used with randomisation, bits that
 *	are 0 in the mask should be randomised, bits that are 1 should
 *	be taken from the @mac_addr
 * @scan_6ghz: relevant for split scan request only,
 *	true if this is a 6 GHz scan request
 * @first_part: %true if this is the first part of a split scan request or a
 *	scan that was not split. May be %true for a @scan_6ghz scan if no other
 *	channels were requested
 * @n_6ghz_params: number of 6 GHz params
 * @scan_6ghz_params: 6 GHz params
 * @bssid: BSSID to scan for (most commonly, the wildcard BSSID)
 * @tsf_report_link_id: for MLO, indicates the link ID of the BSS that should be
 *      used for TSF reporting. Can be set to -1 to indicate no preference.
 */
struct cfg80211_scan_request {
	struct cfg80211_ssid *ssids;
	int n_ssids;
	u32 n_channels;
	const u8 *ie;
	size_t ie_len;
	u16 duration;
	bool duration_mandatory;
	u32 flags;

	u32 rates[NUM_NL80211_BANDS];

	struct wireless_dev *wdev;

	u8 mac_addr[ETH_ALEN] __aligned(2);
	u8 mac_addr_mask[ETH_ALEN] __aligned(2);
	u8 bssid[ETH_ALEN] __aligned(2);
	struct wiphy *wiphy;
	unsigned long scan_start;
	bool no_cck;
	bool scan_6ghz;
	bool first_part;
	u32 n_6ghz_params;
	struct cfg80211_scan_6ghz_params *scan_6ghz_params;
	s8 tsf_report_link_id;

	/* keep last */
	struct ieee80211_channel *channels[];
};

static inline void get_random_mask_addr(u8 *buf, const u8 *addr, const u8 *mask)
{
	int i;

	get_random_bytes(buf, ETH_ALEN);
	for (i = 0; i < ETH_ALEN; i++) {
		buf[i] &= ~mask[i];
		buf[i] |= addr[i] & mask[i];
	}
}

/**
 * struct cfg80211_match_set - sets of attributes to match
 *
 * @ssid: SSID to be matched; may be zero-length in case of BSSID match
 *	or no match (RSSI only)
 * @bssid: BSSID to be matched; may be all-zero BSSID in case of SSID match
 *	or no match (RSSI only)
 * @rssi_thold: don't report scan results below this threshold (in s32 dBm)
 */
struct cfg80211_match_set {
	struct cfg80211_ssid ssid;
	u8 bssid[ETH_ALEN];
	s32 rssi_thold;
};

/**
 * struct cfg80211_sched_scan_plan - scan plan for scheduled scan
 *
 * @interval: interval between scheduled scan iterations. In seconds.
 * @iterations: number of scan iterations in this scan plan. Zero means
 *	infinite loop.
 *	The last scan plan will always have this parameter set to zero,
 *	all other scan plans will have a finite number of iterations.
 */
struct cfg80211_sched_scan_plan {
	u32 interval;
	u32 iterations;
};

/**
 * struct cfg80211_bss_select_adjust - BSS selection with RSSI adjustment.
 *
 * @band: band of BSS which should match for RSSI level adjustment.
 * @delta: value of RSSI level adjustment.
 */
struct cfg80211_bss_select_adjust {
	enum nl80211_band band;
	s8 delta;
};

/**
 * struct cfg80211_sched_scan_request - scheduled scan request description
 *
 * @reqid: identifies this request.
 * @ssids: SSIDs to scan for (passed in the probe_reqs in active scans)
 * @n_ssids: number of SSIDs
 * @n_channels: total number of channels to scan
 * @ie: optional information element(s) to add into Probe Request or %NULL
 * @ie_len: length of ie in octets
 * @flags: control flags from &enum nl80211_scan_flags
 * @match_sets: sets of parameters to be matched for a scan result
 *	entry to be considered valid and to be passed to the host
 *	(others are filtered out).
 *	If omitted, all results are passed.
 * @n_match_sets: number of match sets
 * @report_results: indicates that results were reported for this request
 * @wiphy: the wiphy this was for
 * @dev: the interface
 * @scan_start: start time of the scheduled scan
 * @channels: channels to scan
 * @min_rssi_thold: for drivers only supporting a single threshold, this
 *	contains the minimum over all matchsets
 * @mac_addr: MAC address used with randomisation
 * @mac_addr_mask: MAC address mask used with randomisation, bits that
 *	are 0 in the mask should be randomised, bits that are 1 should
 *	be taken from the @mac_addr
 * @scan_plans: scan plans to be executed in this scheduled scan. Lowest
 *	index must be executed first.
 * @n_scan_plans: number of scan plans, at least 1.
 * @rcu_head: RCU callback used to free the struct
 * @owner_nlportid: netlink portid of owner (if this should is a request
 *	owned by a particular socket)
 * @nl_owner_dead: netlink owner socket was closed - this request be freed
 * @list: for keeping list of requests.
 * @delay: delay in seconds to use before starting the first scan
 *	cycle.  The driver may ignore this parameter and start
 *	immediately (or at any other time), if this feature is not
 *	supported.
 * @relative_rssi_set: Indicates whether @relative_rssi is set or not.
 * @relative_rssi: Relative RSSI threshold in dB to restrict scan result
 *	reporting in connected state to cases where a matching BSS is determined
 *	to have better or slightly worse RSSI than the current connected BSS.
 *	The relative RSSI threshold values are ignored in disconnected state.
 * @rssi_adjust: delta dB of RSSI preference to be given to the BSSs that belong
 *	to the specified band while deciding whether a better BSS is reported
 *	using @relative_rssi. If delta is a negative number, the BSSs that
 *	belong to the specified band will be penalized by delta dB in relative
 *	comparisons.
 */
struct cfg80211_sched_scan_request {
	u64 reqid;
	struct cfg80211_ssid *ssids;
	int n_ssids;
	u32 n_channels;
	const u8 *ie;
	size_t ie_len;
	u32 flags;
	struct cfg80211_match_set *match_sets;
	int n_match_sets;
	s32 min_rssi_thold;
	u32 delay;
	struct cfg80211_sched_scan_plan *scan_plans;
	int n_scan_plans;

	u8 mac_addr[ETH_ALEN] __aligned(2);
	u8 mac_addr_mask[ETH_ALEN] __aligned(2);

	bool relative_rssi_set;
	s8 relative_rssi;
	struct cfg80211_bss_select_adjust rssi_adjust;

	/* internal */
	struct wiphy *wiphy;
	struct net_device *dev;
	unsigned long scan_start;
	bool report_results;
	struct rcu_head rcu_head;
	u32 owner_nlportid;
	bool nl_owner_dead;
	struct list_head list;

	/* keep last */
	struct ieee80211_channel *channels[] __counted_by(n_channels);
};

/**
 * enum cfg80211_signal_type - signal type
 *
 * @CFG80211_SIGNAL_TYPE_NONE: no signal strength information available
 * @CFG80211_SIGNAL_TYPE_MBM: signal strength in mBm (100*dBm)
 * @CFG80211_SIGNAL_TYPE_UNSPEC: signal strength, increasing from 0 through 100
 */
enum cfg80211_signal_type {
	CFG80211_SIGNAL_TYPE_NONE,
	CFG80211_SIGNAL_TYPE_MBM,
	CFG80211_SIGNAL_TYPE_UNSPEC,
};

/**
 * struct cfg80211_inform_bss - BSS inform data
 * @chan: channel the frame was received on
 * @signal: signal strength value, according to the wiphy's
 *	signal type
 * @boottime_ns: timestamp (CLOCK_BOOTTIME) when the information was
 *	received; should match the time when the frame was actually
 *	received by the device (not just by the host, in case it was
 *	buffered on the device) and be accurate to about 10ms.
 *	If the frame isn't buffered, just passing the return value of
 *	ktime_get_boottime_ns() is likely appropriate.
 * @parent_tsf: the time at the start of reception of the first octet of the
 *	timestamp field of the frame. The time is the TSF of the BSS specified
 *	by %parent_bssid.
 * @parent_bssid: the BSS according to which %parent_tsf is set. This is set to
 *	the BSS that requested the scan in which the beacon/probe was received.
 * @chains: bitmask for filled values in @chain_signal.
 * @chain_signal: per-chain signal strength of last received BSS in dBm.
 * @restrict_use: restrict usage, if not set, assume @use_for is
 *	%NL80211_BSS_USE_FOR_NORMAL.
 * @use_for: bitmap of possible usage for this BSS, see
 *	&enum nl80211_bss_use_for
 * @cannot_use_reasons: the reasons (bitmap) for not being able to connect,
 *	if @restrict_use is set and @use_for is zero (empty); may be 0 for
 *	unspecified reasons; see &enum nl80211_bss_cannot_use_reasons
 * @drv_data: Data to be passed through to @inform_bss
 */
struct cfg80211_inform_bss {
	struct ieee80211_channel *chan;
	s32 signal;
	u64 boottime_ns;
	u64 parent_tsf;
	u8 parent_bssid[ETH_ALEN] __aligned(2);
	u8 chains;
	s8 chain_signal[IEEE80211_MAX_CHAINS];

	u8 restrict_use:1, use_for:7;
	u8 cannot_use_reasons;

	void *drv_data;
};

/**
 * struct cfg80211_bss_ies - BSS entry IE data
 * @tsf: TSF contained in the frame that carried these IEs
 * @rcu_head: internal use, for freeing
 * @len: length of the IEs
 * @from_beacon: these IEs are known to come from a beacon
 * @data: IE data
 */
struct cfg80211_bss_ies {
	u64 tsf;
	struct rcu_head rcu_head;
	int len;
	bool from_beacon;
	u8 data[];
};

/**
 * struct cfg80211_bss - BSS description
 *
 * This structure describes a BSS (which may also be a mesh network)
 * for use in scan results and similar.
 *
 * @channel: channel this BSS is on
 * @bssid: BSSID of the BSS
 * @beacon_interval: the beacon interval as from the frame
 * @capability: the capability field in host byte order
 * @ies: the information elements (Note that there is no guarantee that these
 *	are well-formed!); this is a pointer to either the beacon_ies or
 *	proberesp_ies depending on whether Probe Response frame has been
 *	received. It is always non-%NULL.
 * @beacon_ies: the information elements from the last Beacon frame
 *	(implementation note: if @hidden_beacon_bss is set this struct doesn't
 *	own the beacon_ies, but they're just pointers to the ones from the
 *	@hidden_beacon_bss struct)
 * @proberesp_ies: the information elements from the last Probe Response frame
 * @proberesp_ecsa_stuck: ECSA element is stuck in the Probe Response frame,
 *	cannot rely on it having valid data
 * @hidden_beacon_bss: in case this BSS struct represents a probe response from
 *	a BSS that hides the SSID in its beacon, this points to the BSS struct
 *	that holds the beacon data. @beacon_ies is still valid, of course, and
 *	points to the same data as hidden_beacon_bss->beacon_ies in that case.
 * @transmitted_bss: pointer to the transmitted BSS, if this is a
 *	non-transmitted one (multi-BSSID support)
 * @nontrans_list: list of non-transmitted BSS, if this is a transmitted one
 *	(multi-BSSID support)
 * @signal: signal strength value (type depends on the wiphy's signal_type)
 * @ts_boottime: timestamp of the last BSS update in nanoseconds since boot
 * @chains: bitmask for filled values in @chain_signal.
 * @chain_signal: per-chain signal strength of last received BSS in dBm.
 * @bssid_index: index in the multiple BSS set
 * @max_bssid_indicator: max number of members in the BSS set
 * @use_for: bitmap of possible usage for this BSS, see
 *	&enum nl80211_bss_use_for
 * @cannot_use_reasons: the reasons (bitmap) for not being able to connect,
 *	if @restrict_use is set and @use_for is zero (empty); may be 0 for
 *	unspecified reasons; see &enum nl80211_bss_cannot_use_reasons
 * @priv: private area for driver use, has at least wiphy->bss_priv_size bytes
 */
struct cfg80211_bss {
	struct ieee80211_channel *channel;

	const struct cfg80211_bss_ies __rcu *ies;
	const struct cfg80211_bss_ies __rcu *beacon_ies;
	const struct cfg80211_bss_ies __rcu *proberesp_ies;

	struct cfg80211_bss *hidden_beacon_bss;
	struct cfg80211_bss *transmitted_bss;
	struct list_head nontrans_list;

	s32 signal;

	u64 ts_boottime;

	u16 beacon_interval;
	u16 capability;

	u8 bssid[ETH_ALEN];
	u8 chains;
	s8 chain_signal[IEEE80211_MAX_CHAINS];

	u8 proberesp_ecsa_stuck:1;

	u8 bssid_index;
	u8 max_bssid_indicator;

	u8 use_for;
	u8 cannot_use_reasons;

	u8 priv[] __aligned(sizeof(void *));
};

/**
 * ieee80211_bss_get_elem - find element with given ID
 * @bss: the bss to search
 * @id: the element ID
 *
 * Note that the return value is an RCU-protected pointer, so
 * rcu_read_lock() must be held when calling this function.
 * Return: %NULL if not found.
 */
const struct element *ieee80211_bss_get_elem(struct cfg80211_bss *bss, u8 id);

/**
 * ieee80211_bss_get_ie - find IE with given ID
 * @bss: the bss to search
 * @id: the element ID
 *
 * Note that the return value is an RCU-protected pointer, so
 * rcu_read_lock() must be held when calling this function.
 * Return: %NULL if not found.
 */
static inline const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 id)
{
	return (const void *)ieee80211_bss_get_elem(bss, id);
}


/**
 * struct cfg80211_auth_request - Authentication request data
 *
 * This structure provides information needed to complete IEEE 802.11
 * authentication.
 *
 * @bss: The BSS to authenticate with, the callee must obtain a reference
 *	to it if it needs to keep it.
 * @supported_selectors: List of selectors that should be assumed to be
 *	supported by the station.
 *	SAE_H2E must be assumed supported if set to %NULL.
 * @supported_selectors_len: Length of supported_selectors in octets.
 * @auth_type: Authentication type (algorithm)
 * @ie: Extra IEs to add to Authentication frame or %NULL
 * @ie_len: Length of ie buffer in octets
 * @key_len: length of WEP key for shared key authentication
 * @key_idx: index of WEP key for shared key authentication
 * @key: WEP key for shared key authentication
 * @auth_data: Fields and elements in Authentication frames. This contains
 *	the authentication frame body (non-IE and IE data), excluding the
 *	Authentication algorithm number, i.e., starting at the Authentication
 *	transaction sequence number field.
 * @auth_data_len: Length of auth_data buffer in octets
 * @link_id: if >= 0, indicates authentication should be done as an MLD,
 *	the interface address is included as the MLD address and the
 *	necessary link (with the given link_id) will be created (and
 *	given an MLD address) by the driver
 * @ap_mld_addr: AP MLD address in case of authentication request with
 *	an AP MLD, valid iff @link_id >= 0
 */
struct cfg80211_auth_request {
	struct cfg80211_bss *bss;
	const u8 *ie;
	size_t ie_len;
	const u8 *supported_selectors;
	u8 supported_selectors_len;
	enum nl80211_auth_type auth_type;
	const u8 *key;
	u8 key_len;
	s8 key_idx;
	const u8 *auth_data;
	size_t auth_data_len;
	s8 link_id;
	const u8 *ap_mld_addr;
};

/**
 * struct cfg80211_assoc_link - per-link information for MLO association
 * @bss: the BSS pointer, see also &struct cfg80211_assoc_request::bss;
 *	if this is %NULL for a link, that link is not requested
 * @elems: extra elements for the per-STA profile for this link
 * @elems_len: length of the elements
 * @error: per-link error code, must be <= 0. If there is an error, then the
 *	operation as a whole must fail.
 */
struct cfg80211_assoc_link {
	struct cfg80211_bss *bss;
	const u8 *elems;
	size_t elems_len;
	int error;
};

/**
 * struct cfg80211_ml_reconf_req - MLO link reconfiguration request
 * @add_links: data for links to add, see &struct cfg80211_assoc_link
 * @rem_links: bitmap of links to remove
 * @ext_mld_capa_ops: extended MLD capabilities and operations set by
 *	userspace for the ML reconfiguration action frame
 */
struct cfg80211_ml_reconf_req {
	struct cfg80211_assoc_link add_links[IEEE80211_MLD_MAX_NUM_LINKS];
	u16 rem_links;
	u16 ext_mld_capa_ops;
};

/**
 * enum cfg80211_assoc_req_flags - Over-ride default behaviour in association.
 *
 * @ASSOC_REQ_DISABLE_HT:  Disable HT (802.11n)
 * @ASSOC_REQ_DISABLE_VHT:  Disable VHT
 * @ASSOC_REQ_USE_RRM: Declare RRM capability in this association
 * @CONNECT_REQ_EXTERNAL_AUTH_SUPPORT: User space indicates external
 *	authentication capability. Drivers can offload authentication to
 *	userspace if this flag is set. Only applicable for cfg80211_connect()
 *	request (connect callback).
 * @ASSOC_REQ_DISABLE_HE:  Disable HE
 * @ASSOC_REQ_DISABLE_EHT:  Disable EHT
 * @CONNECT_REQ_MLO_SUPPORT: Userspace indicates support for handling MLD links.
 *	Drivers shall disable MLO features for the current association if this
 *	flag is not set.
 * @ASSOC_REQ_SPP_AMSDU: SPP A-MSDUs will be used on this connection (if any)
 * @ASSOC_REQ_DISABLE_UHR: Disable UHR
 */
enum cfg80211_assoc_req_flags {
	ASSOC_REQ_DISABLE_HT			= BIT(0),
	ASSOC_REQ_DISABLE_VHT			= BIT(1),
	ASSOC_REQ_USE_RRM			= BIT(2),
	CONNECT_REQ_EXTERNAL_AUTH_SUPPORT	= BIT(3),
	ASSOC_REQ_DISABLE_HE			= BIT(4),
	ASSOC_REQ_DISABLE_EHT			= BIT(5),
	CONNECT_REQ_MLO_SUPPORT			= BIT(6),
	ASSOC_REQ_SPP_AMSDU			= BIT(7),
	ASSOC_REQ_DISABLE_UHR			= BIT(8),
};

/**
 * struct cfg80211_assoc_request - (Re)Association request data
 *
 * This structure provides information needed to complete IEEE 802.11
 * (re)association.
 * @bss: The BSS to associate with. If the call is successful the driver is
 *	given a reference that it must give back to cfg80211_send_rx_assoc()
 *	or to cfg80211_assoc_timeout(). To ensure proper refcounting, new
 *	association requests while already associating must be rejected.
 *	This also applies to the @links.bss parameter, which is used instead
 *	of this one (it is %NULL) for MLO associations.
 * @ie: Extra IEs to add to (Re)Association Request frame or %NULL
 * @ie_len: Length of ie buffer in octets
 * @use_mfp: Use management frame protection (IEEE 802.11w) in this association
 * @crypto: crypto settings
 * @prev_bssid: previous BSSID, if not %NULL use reassociate frame. This is used
 *	to indicate a request to reassociate within the ESS instead of a request
 *	do the initial association with the ESS. When included, this is set to
 *	the BSSID of the current association, i.e., to the value that is
 *	included in the Current AP address field of the Reassociation Request
 *	frame.
 * @flags:  See &enum cfg80211_assoc_req_flags
 * @supported_selectors: supported BSS selectors in IEEE 802.11 format
 *	(or %NULL for no change).
 *	If %NULL, then support for SAE_H2E should be assumed.
 * @supported_selectors_len: number of supported BSS selectors
 * @ht_capa:  HT Capabilities over-rides.  Values set in ht_capa_mask
 *	will be used in ht_capa.  Un-supported values will be ignored.
 * @ht_capa_mask:  The bits of ht_capa which are to be used.
 * @vht_capa: VHT capability override
 * @vht_capa_mask: VHT capability mask indicating which fields to use
 * @fils_kek: FILS KEK for protecting (Re)Association Request/Response frame or
 *	%NULL if FILS is not used.
 * @fils_kek_len: Length of fils_kek in octets
 * @fils_nonces: FILS nonces (part of AAD) for protecting (Re)Association
 *	Request/Response frame or %NULL if FILS is not used. This field starts
 *	with 16 octets of STA Nonce followed by 16 octets of AP Nonce.
 * @s1g_capa: S1G capability override
 * @s1g_capa_mask: S1G capability override mask
 * @links: per-link information for MLO connections
 * @link_id: >= 0 for MLO connections, where links are given, and indicates
 *	the link on which the association request should be sent
 * @ap_mld_addr: AP MLD address in case of MLO association request,
 *	valid iff @link_id >= 0
 * @ext_mld_capa_ops: extended MLD capabilities and operations set by
 *	userspace for the association
 */
struct cfg80211_assoc_request {
	struct cfg80211_bss *bss;
	const u8 *ie, *prev_bssid;
	size_t ie_len;
	struct cfg80211_crypto_settings crypto;
	bool use_mfp;
	u32 flags;
	const u8 *supported_selectors;
	u8 supported_selectors_len;
	struct ieee80211_ht_cap ht_capa;
	struct ieee80211_ht_cap ht_capa_mask;
	struct ieee80211_vht_cap vht_capa, vht_capa_mask;
	const u8 *fils_kek;
	size_t fils_kek_len;
	const u8 *fils_nonces;
	struct ieee80211_s1g_cap s1g_capa, s1g_capa_mask;
	struct cfg80211_assoc_link links[IEEE80211_MLD_MAX_NUM_LINKS];
	const u8 *ap_mld_addr;
	s8 link_id;
	u16 ext_mld_capa_ops;
};

/**
 * struct cfg80211_deauth_request - Deauthentication request data
 *
 * This structure provides information needed to complete IEEE 802.11
 * deauthentication.
 *
 * @bssid: the BSSID or AP MLD address to deauthenticate from
 * @ie: Extra IEs to add to Deauthentication frame or %NULL
 * @ie_len: Length of ie buffer in octets
 * @reason_code: The reason code for the deauthentication
 * @local_state_change: if set, change local state only and
 *	do not set a deauth frame
 */
struct cfg80211_deauth_request {
	const u8 *bssid;
	const u8 *ie;
	size_t ie_len;
	u16 reason_code;
	bool local_state_change;
};

/**
 * struct cfg80211_disassoc_request - Disassociation request data
 *
 * This structure provides information needed to complete IEEE 802.11
 * disassociation.
 *
 * @ap_addr: the BSSID or AP MLD address to disassociate from
 * @ie: Extra IEs to add to Disassociation frame or %NULL
 * @ie_len: Length of ie buffer in octets
 * @reason_code: The reason code for the disassociation
 * @local_state_change: This is a request for a local state only, i.e., no
 *	Disassociation frame is to be transmitted.
 */
struct cfg80211_disassoc_request {
	const u8 *ap_addr;
	const u8 *ie;
	size_t ie_len;
	u16 reason_code;
	bool local_state_change;
};

/**
 * struct cfg80211_ibss_params - IBSS parameters
 *
 * This structure defines the IBSS parameters for the join_ibss()
 * method.
 *
 * @ssid: The SSID, will always be non-null.
 * @ssid_len: The length of the SSID, will always be non-zero.
 * @bssid: Fixed BSSID requested, maybe be %NULL, if set do not
 *	search for IBSSs with a different BSSID.
 * @chandef: defines the channel to use if no other IBSS to join can be found
 * @channel_fixed: The channel should be fixed -- do not search for
 *	IBSSs to join on other channels.
 * @ie: information element(s) to include in the beacon
 * @ie_len: length of that
 * @beacon_interval: beacon interval to use
 * @privacy: this is a protected network, keys will be configured
 *	after joining
 * @control_port: whether user space controls IEEE 802.1X port, i.e.,
 *	sets/clears %NL80211_STA_FLAG_AUTHORIZED. If true, the driver is
 *	required to assume that the port is unauthorized until authorized by
 *	user space. Otherwise, port is marked authorized by default.
 * @control_port_over_nl80211: TRUE if userspace expects to exchange control
 *	port frames over NL80211 instead of the network interface.
 * @userspace_handles_dfs: whether user space controls DFS operation, i.e.
 *	changes the channel when a radar is detected. This is required
 *	to operate on DFS channels.
 * @basic_rates: bitmap of basic rates to use when creating the IBSS
 * @mcast_rate: per-band multicast rate index + 1 (0: disabled)
 * @ht_capa:  HT Capabilities over-rides.  Values set in ht_capa_mask
 *	will be used in ht_capa.  Un-supported values will be ignored.
 * @ht_capa_mask:  The bits of ht_capa which are to be used.
 * @wep_keys: static WEP keys, if not NULL points to an array of
 *	CFG80211_MAX_WEP_KEYS WEP keys
 * @wep_tx_key: key index (0..3) of the default TX static WEP key
 */
struct cfg80211_ibss_params {
	const u8 *ssid;
	const u8 *bssid;
	struct cfg80211_chan_def chandef;
	const u8 *ie;
	u8 ssid_len, ie_len;
	u16 beacon_interval;
	u32 basic_rates;
	bool channel_fixed;
	bool privacy;
	bool control_port;
	bool control_port_over_nl80211;
	bool userspace_handles_dfs;
	int mcast_rate[NUM_NL80211_BANDS];
	struct ieee80211_ht_cap ht_capa;
	struct ieee80211_ht_cap ht_capa_mask;
	struct key_params *wep_keys;
	int wep_tx_key;
};

/**
 * struct cfg80211_bss_selection - connection parameters for BSS selection.
 *
 * @behaviour: requested BSS selection behaviour.
 * @param: parameters for requestion behaviour.
 * @param.band_pref: preferred band for %NL80211_BSS_SELECT_ATTR_BAND_PREF.
 * @param.adjust: parameters for %NL80211_BSS_SELECT_ATTR_RSSI_ADJUST.
 */
struct cfg80211_bss_selection {
	enum nl80211_bss_select_attr behaviour;
	union {
		enum nl80211_band band_pref;
		struct cfg80211_bss_select_adjust adjust;
	} param;
};

/**
 * struct cfg80211_connect_params - Connection parameters
 *
 * This structure provides information needed to complete IEEE 802.11
 * authentication and association.
 *
 * @channel: The channel to use or %NULL if not specified (auto-select based
 *	on scan results)
 * @channel_hint: The channel of the recommended BSS for initial connection or
 *	%NULL if not specified
 * @bssid: The AP BSSID or %NULL if not specified (auto-select based on scan
 *	results)
 * @bssid_hint: The recommended AP BSSID for initial connection to the BSS or
 *	%NULL if not specified. Unlike the @bssid parameter, the driver is
 *	allowed to ignore this @bssid_hint if it has knowledge of a better BSS
 *	to use.
 * @ssid: SSID
 * @ssid_len: Length of ssid in octets
 * @auth_type: Authentication type (algorithm)
 * @ie: IEs for association request
 * @ie_len: Length of assoc_ie in octets
 * @privacy: indicates whether privacy-enabled APs should be used
 * @mfp: indicate whether management frame protection is used
 * @crypto: crypto settings
 * @key_len: length of WEP key for shared key authentication
 * @key_idx: index of WEP key for shared key authentication
 * @key: WEP key for shared key authentication
 * @flags:  See &enum cfg80211_assoc_req_flags
 * @bg_scan_period:  Background scan period in seconds
 *	or -1 to indicate that default value is to be used.
 * @ht_capa:  HT Capabilities over-rides.  Values set in ht_capa_mask
 *	will be used in ht_capa.  Un-supported values will be ignored.
 * @ht_capa_mask:  The bits of ht_capa which are to be used.
 * @vht_capa:  VHT Capability overrides
 * @vht_capa_mask: The bits of vht_capa which are to be used.
 * @pbss: if set, connect to a PCP instead of AP. Valid for DMG
 *	networks.
 * @bss_select: criteria to be used for BSS selection.
 * @prev_bssid: previous BSSID, if not %NULL use reassociate frame. This is used
 *	to indicate a request to reassociate within the ESS instead of a request
 *	do the initial association with the ESS. When included, this is set to
 *	the BSSID of the current association, i.e., to the value that is
 *	included in the Current AP address field of the Reassociation Request
 *	frame.
 * @fils_erp_username: EAP re-authentication protocol (ERP) username part of the
 *	NAI or %NULL if not specified. This is used to construct FILS wrapped
 *	data IE.
 * @fils_erp_username_len: Length of @fils_erp_username in octets.
 * @fils_erp_realm: EAP re-authentication protocol (ERP) realm part of NAI or
 *	%NULL if not specified. This specifies the domain name of ER server and
 *	is used to construct FILS wrapped data IE.
 * @fils_erp_realm_len: Length of @fils_erp_realm in octets.
 * @fils_erp_next_seq_num: The next sequence number to use in the FILS ERP
 *	messages. This is also used to construct FILS wrapped data IE.
 * @fils_erp_rrk: ERP re-authentication Root Key (rRK) used to derive additional
 *	keys in FILS or %NULL if not specified.
 * @fils_erp_rrk_len: Length of @fils_erp_rrk in octets.
 * @want_1x: indicates user-space supports and wants to use 802.1X driver
 *	offload of 4-way handshake.
 * @edmg: define the EDMG channels.
 *	This may specify multiple channels and bonding options for the driver
 *	to choose from, based on BSS configuration.
 */
struct cfg80211_connect_params {
	struct ieee80211_channel *channel;
	struct ieee80211_channel *channel_hint;
	const u8 *bssid;
	const u8 *bssid_hint;
	const u8 *ssid;
	size_t ssid_len;
	enum nl80211_auth_type auth_type;
	const u8 *ie;
	size_t ie_len;
	bool privacy;
	enum nl80211_mfp mfp;
	struct cfg80211_crypto_settings crypto;
	const u8 *key;
	u8 key_len, key_idx;
	u32 flags;
	int bg_scan_period;
	struct ieee80211_ht_cap ht_capa;
	struct ieee80211_ht_cap ht_capa_mask;
	struct ieee80211_vht_cap vht_capa;
	struct ieee80211_vht_cap vht_capa_mask;
	bool pbss;
	struct cfg80211_bss_selection bss_select;
	const u8 *prev_bssid;
	const u8 *fils_erp_username;
	size_t fils_erp_username_len;
	const u8 *fils_erp_realm;
	size_t fils_erp_realm_len;
	u16 fils_erp_next_seq_num;
	const u8 *fils_erp_rrk;
	size_t fils_erp_rrk_len;
	bool want_1x;
	struct ieee80211_edmg edmg;
};

/**
 * enum cfg80211_connect_params_changed - Connection parameters being updated
 *
 * This enum provides information of all connect parameters that
 * have to be updated as part of update_connect_params() call.
 *
 * @UPDATE_ASSOC_IES: Indicates whether association request IEs are updated
 * @UPDATE_FILS_ERP_INFO: Indicates that FILS connection parameters (realm,
 *	username, erp sequence number and rrk) are updated
 * @UPDATE_AUTH_TYPE: Indicates that authentication type is updated
 */
enum cfg80211_connect_params_changed {
	UPDATE_ASSOC_IES		= BIT(0),
	UPDATE_FILS_ERP_INFO		= BIT(1),
	UPDATE_AUTH_TYPE		= BIT(2),
};

/**
 * enum wiphy_params_flags - set_wiphy_params bitfield values
 * @WIPHY_PARAM_RETRY_SHORT: wiphy->retry_short has changed
 * @WIPHY_PARAM_RETRY_LONG: wiphy->retry_long has changed
 * @WIPHY_PARAM_FRAG_THRESHOLD: wiphy->frag_threshold has changed
 * @WIPHY_PARAM_RTS_THRESHOLD: wiphy->rts_threshold has changed
 * @WIPHY_PARAM_COVERAGE_CLASS: coverage class changed
 * @WIPHY_PARAM_DYN_ACK: dynack has been enabled
 * @WIPHY_PARAM_TXQ_LIMIT: TXQ packet limit has been changed
 * @WIPHY_PARAM_TXQ_MEMORY_LIMIT: TXQ memory limit has been changed
 * @WIPHY_PARAM_TXQ_QUANTUM: TXQ scheduler quantum
 */
enum wiphy_params_flags {
	WIPHY_PARAM_RETRY_SHORT		= BIT(0),
	WIPHY_PARAM_RETRY_LONG		= BIT(1),
	WIPHY_PARAM_FRAG_THRESHOLD	= BIT(2),
	WIPHY_PARAM_RTS_THRESHOLD	= BIT(3),
	WIPHY_PARAM_COVERAGE_CLASS	= BIT(4),
	WIPHY_PARAM_DYN_ACK		= BIT(5),
	WIPHY_PARAM_TXQ_LIMIT		= BIT(6),
	WIPHY_PARAM_TXQ_MEMORY_LIMIT	= BIT(7),
	WIPHY_PARAM_TXQ_QUANTUM		= BIT(8),
};

#define IEEE80211_DEFAULT_AIRTIME_WEIGHT	256

/* The per TXQ device queue limit in airtime */
#define IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L	5000
#define IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H	12000

/* The per interface airtime threshold to switch to lower queue limit */
#define IEEE80211_AQL_THRESHOLD			24000

/**
 * struct cfg80211_pmksa - PMK Security Association
 *
 * This structure is passed to the set/del_pmksa() method for PMKSA
 * caching.
 *
 * @bssid: The AP's BSSID (may be %NULL).
 * @pmkid: The identifier to refer a PMKSA.
 * @pmk: The PMK for the PMKSA identified by @pmkid. This is used for key
 *	derivation by a FILS STA. Otherwise, %NULL.
 * @pmk_len: Length of the @pmk. The length of @pmk can differ depending on
 *	the hash algorithm used to generate this.
 * @ssid: SSID to specify the ESS within which a PMKSA is valid when using FILS
 *	cache identifier (may be %NULL).
 * @ssid_len: Length of the @ssid in octets.
 * @cache_id: 2-octet cache identifier advertized by a FILS AP identifying the
 *	scope of PMKSA. This is valid only if @ssid_len is non-zero (may be
 *	%NULL).
 * @pmk_lifetime: Maximum lifetime for PMKSA in seconds
 *	(dot11RSNAConfigPMKLifetime) or 0 if not specified.
 *	The configured PMKSA must not be used for PMKSA caching after
 *	expiration and any keys derived from this PMK become invalid on
 *	expiration, i.e., the current association must be dropped if the PMK
 *	used for it expires.
 * @pmk_reauth_threshold: Threshold time for reauthentication (percentage of
 *	PMK lifetime, dot11RSNAConfigPMKReauthThreshold) or 0 if not specified.
 *	Drivers are expected to trigger a full authentication instead of using
 *	this PMKSA for caching when reassociating to a new BSS after this
 *	threshold to generate a new PMK before the current one expires.
 */
struct cfg80211_pmksa {
	const u8 *bssid;
	const u8 *pmkid;
	const u8 *pmk;
	size_t pmk_len;
	const u8 *ssid;
	size_t ssid_len;
	const u8 *cache_id;
	u32 pmk_lifetime;
	u8 pmk_reauth_threshold;
};

/**
 * struct cfg80211_pkt_pattern - packet pattern
 * @mask: bitmask where to match pattern and where to ignore bytes,
 *	one bit per byte, in same format as nl80211
 * @pattern: bytes to match where bitmask is 1
 * @pattern_len: length of pattern (in bytes)
 * @pkt_offset: packet offset (in bytes)
 *
 * Internal note: @mask and @pattern are allocated in one chunk of
 * memory, free @mask only!
 */
struct cfg80211_pkt_pattern {
	const u8 *mask, *pattern;
	int pattern_len;
	int pkt_offset;
};

/**
 * struct cfg80211_wowlan_tcp - TCP connection parameters
 *
 * @sock: (internal) socket for source port allocation
 * @src: source IP address
 * @dst: destination IP address
 * @dst_mac: destination MAC address
 * @src_port: source port
 * @dst_port: destination port
 * @payload_len: data payload length
 * @payload: data payload buffer
 * @payload_seq: payload sequence stamping configuration
 * @data_interval: interval at which to send data packets
 * @wake_len: wakeup payload match length
 * @wake_data: wakeup payload match data
 * @wake_mask: wakeup payload match mask
 * @tokens_size: length of the tokens buffer
 * @payload_tok: payload token usage configuration
 */
struct cfg80211_wowlan_tcp {
	struct socket *sock;
	__be32 src, dst;
	u16 src_port, dst_port;
	u8 dst_mac[ETH_ALEN];
	int payload_len;
	const u8 *payload;
	struct nl80211_wowlan_tcp_data_seq payload_seq;
	u32 data_interval;
	u32 wake_len;
	const u8 *wake_data, *wake_mask;
	u32 tokens_size;
	/* must be last, variable member */
	struct nl80211_wowlan_tcp_data_token payload_tok;
};

/**
 * struct cfg80211_wowlan - Wake on Wireless-LAN support info
 *
 * This structure defines the enabled WoWLAN triggers for the device.
 * @any: wake up on any activity -- special trigger if device continues
 *	operating as normal during suspend
 * @disconnect: wake up if getting disconnected
 * @magic_pkt: wake up on receiving magic packet
 * @patterns: wake up on receiving packet matching a pattern
 * @n_patterns: number of patterns
 * @gtk_rekey_failure: wake up on GTK rekey failure
 * @eap_identity_req: wake up on EAP identity request packet
 * @four_way_handshake: wake up on 4-way handshake
 * @rfkill_release: wake up when rfkill is released
 * @tcp: TCP connection establishment/wakeup parameters, see nl80211.h.
 *	NULL if not configured.
 * @nd_config: configuration for the scan to be used for net detect wake.
 */
struct cfg80211_wowlan {
	bool any, disconnect, magic_pkt, gtk_rekey_failure,
	     eap_identity_req, four_way_handshake,
	     rfkill_release;
	struct cfg80211_pkt_pattern *patterns;
	struct cfg80211_wowlan_tcp *tcp;
	int n_patterns;
	struct cfg80211_sched_scan_request *nd_config;
};

/**
 * struct cfg80211_coalesce_rules - Coalesce rule parameters
 *
 * This structure defines coalesce rule for the device.
 * @delay: maximum coalescing delay in msecs.
 * @condition: condition for packet coalescence.
 *	see &enum nl80211_coalesce_condition.
 * @patterns: array of packet patterns
 * @n_patterns: number of patterns
 */
struct cfg80211_coalesce_rules {
	int delay;
	enum nl80211_coalesce_condition condition;
	struct cfg80211_pkt_pattern *patterns;
	int n_patterns;
};

/**
 * struct cfg80211_coalesce - Packet coalescing settings
 *
 * This structure defines coalescing settings.
 * @rules: array of coalesce rules
 * @n_rules: number of rules
 */
struct cfg80211_coalesce {
	int n_rules;
	struct cfg80211_coalesce_rules rules[] __counted_by(n_rules);
};

/**
 * struct cfg80211_wowlan_nd_match - information about the match
 *
 * @ssid: SSID of the match that triggered the wake up
 * @n_channels: Number of channels where the match occurred.  This
 *	value may be zero if the driver can't report the channels.
 * @channels: center frequencies of the channels where a match
 *	occurred (in MHz)
 */
struct cfg80211_wowlan_nd_match {
	struct cfg80211_ssid ssid;
	int n_channels;
	u32 channels[] __counted_by(n_channels);
};

/**
 * struct cfg80211_wowlan_nd_info - net detect wake up information
 *
 * @n_matches: Number of match information instances provided in
 *	@matches.  This value may be zero if the driver can't provide
 *	match information.
 * @matches: Array of pointers to matches containing information about
 *	the matches that triggered the wake up.
 */
struct cfg80211_wowlan_nd_info {
	int n_matches;
	struct cfg80211_wowlan_nd_match *matches[] __counted_by(n_matches);
};

/**
 * struct cfg80211_wowlan_wakeup - wakeup report
 * @disconnect: woke up by getting disconnected
 * @magic_pkt: woke up by receiving magic packet
 * @gtk_rekey_failure: woke up by GTK rekey failure
 * @eap_identity_req: woke up by EAP identity request packet
 * @four_way_handshake: woke up by 4-way handshake
 * @rfkill_release: woke up by rfkill being released
 * @pattern_idx: pattern that caused wakeup, -1 if not due to pattern
 * @packet_present_len: copied wakeup packet data
 * @packet_len: original wakeup packet length
 * @packet: The packet causing the wakeup, if any.
 * @packet_80211:  For pattern match, magic packet and other data
 *	frame triggers an 802.3 frame should be reported, for
 *	disconnect due to deauth 802.11 frame. This indicates which
 *	it is.
 * @tcp_match: TCP wakeup packet received
 * @tcp_connlost: TCP connection lost or failed to establish
 * @tcp_nomoretokens: TCP data ran out of tokens
 * @net_detect: if not %NULL, woke up because of net detect
 * @unprot_deauth_disassoc: woke up due to unprotected deauth or
 *	disassoc frame (in MFP).
 */
struct cfg80211_wowlan_wakeup {
	bool disconnect, magic_pkt, gtk_rekey_failure,
	     eap_identity_req, four_way_handshake,
	     rfkill_release, packet_80211,
	     tcp_match, tcp_connlost, tcp_nomoretokens,
	     unprot_deauth_disassoc;
	s32 pattern_idx;
	u32 packet_present_len, packet_len;
	const void *packet;
	struct cfg80211_wowlan_nd_info *net_detect;
};

/**
 * struct cfg80211_gtk_rekey_data - rekey data
 * @kek: key encryption key (@kek_len bytes)
 * @kck: key confirmation key (@kck_len bytes)
 * @replay_ctr: replay counter (NL80211_REPLAY_CTR_LEN bytes)
 * @kek_len: length of kek
 * @kck_len: length of kck
 * @akm: akm (oui, id)
 */
struct cfg80211_gtk_rekey_data {
	const u8 *kek, *kck, *replay_ctr;
	u32 akm;
	u8 kek_len, kck_len;
};

/**
 * struct cfg80211_update_ft_ies_params - FT IE Information
 *
 * This structure provides information needed to update the fast transition IE
 *
 * @md: The Mobility Domain ID, 2 Octet value
 * @ie: Fast Transition IEs
 * @ie_len: Length of ft_ie in octets
 */
struct cfg80211_update_ft_ies_params {
	u16 md;
	const u8 *ie;
	size_t ie_len;
};

/**
 * struct cfg80211_mgmt_tx_params - mgmt tx parameters
 *
 * This structure provides information needed to transmit a mgmt frame
 *
 * @chan: channel to use
 * @offchan: indicates whether off channel operation is required
 * @wait: duration for ROC
 * @buf: buffer to transmit
 * @len: buffer length
 * @no_cck: don't use cck rates for this frame
 * @dont_wait_for_ack: tells the low level not to wait for an ack
 * @n_csa_offsets: length of csa_offsets array
 * @csa_offsets: array of all the csa offsets in the frame
 * @link_id: for MLO, the link ID to transmit on, -1 if not given; note
 *	that the link ID isn't validated (much), it's in range but the
 *	link might not exist (or be used by the receiver STA)
 */
struct cfg80211_mgmt_tx_params {
	struct ieee80211_channel *chan;
	bool offchan;
	unsigned int wait;
	const u8 *buf;
	size_t len;
	bool no_cck;
	bool dont_wait_for_ack;
	int n_csa_offsets;
	const u16 *csa_offsets;
	int link_id;
};

/**
 * struct cfg80211_dscp_exception - DSCP exception
 *
 * @dscp: DSCP value that does not adhere to the user priority range definition
 * @up: user priority value to which the corresponding DSCP value belongs
 */
struct cfg80211_dscp_exception {
	u8 dscp;
	u8 up;
};

/**
 * struct cfg80211_dscp_range - DSCP range definition for user priority
 *
 * @low: lowest DSCP value of this user priority range, inclusive
 * @high: highest DSCP value of this user priority range, inclusive
 */
struct cfg80211_dscp_range {
	u8 low;
	u8 high;
};

/* QoS Map Set element length defined in IEEE Std 802.11-2012, 8.4.2.97 */
#define IEEE80211_QOS_MAP_MAX_EX	21
#define IEEE80211_QOS_MAP_LEN_MIN	16
#define IEEE80211_QOS_MAP_LEN_MAX \
	(IEEE80211_QOS_MAP_LEN_MIN + 2 * IEEE80211_QOS_MAP_MAX_EX)

/**
 * struct cfg80211_qos_map - QoS Map Information
 *
 * This struct defines the Interworking QoS map setting for DSCP values
 *
 * @num_des: number of DSCP exceptions (0..21)
 * @dscp_exception: optionally up to maximum of 21 DSCP exceptions from
 *	the user priority DSCP range definition
 * @up: DSCP range definition for a particular user priority
 */
struct cfg80211_qos_map {
	u8 num_des;
	struct cfg80211_dscp_exception dscp_exception[IEEE80211_QOS_MAP_MAX_EX];
	struct cfg80211_dscp_range up[8];
};

/**
 * struct cfg80211_nan_band_config - NAN band specific configuration
 *
 * @chan: Pointer to the IEEE 802.11 channel structure. The channel to be used
 *	for NAN operations on this band. For 2.4 GHz band, this is always
 *	channel 6. For 5 GHz band, the channel is either 44 or 149, according
 *	to the regulatory constraints. If chan pointer is NULL the entire band
 *	configuration entry is considered invalid and should not be used.
 * @rssi_close: RSSI close threshold used for NAN state transition algorithm
 *	as described in chapters 3.3.6 and 3.3.7 "NAN Device Role and State
 *	Transition" of Wi-Fi Aware Specification v4.0. If not
 *	specified (set to 0), default device value is used. The value should
 *	be greater than -60 dBm.
 * @rssi_middle: RSSI middle threshold used for NAN state transition algorithm.
 *	as described in chapters 3.3.6 and 3.3.7 "NAN Device Role and State
 *	Transition" of Wi-Fi Aware Specification v4.0. If not
 *	specified (set to 0), default device value is used. The value should be
 *	greater than -75 dBm and less than rssi_close.
 * @awake_dw_interval: Committed DW interval. Valid values range: 0-5. 0
 *	indicates no wakeup for DW and can't be used on 2.4GHz band, otherwise
 *	2^(n-1).
 * @disable_scan: If true, the device will not scan this band for cluster
 *	 merge. Disabling scan on 2.4 GHz band is not allowed.
 */
struct cfg80211_nan_band_config {
	struct ieee80211_channel *chan;
	s8 rssi_close;
	s8 rssi_middle;
	u8 awake_dw_interval;
	bool disable_scan;
};

/**
 * struct cfg80211_nan_conf - NAN configuration
 *
 * This struct defines NAN configuration parameters
 *
 * @master_pref: master preference (1 - 255)
 * @bands: operating bands, a bitmap of &enum nl80211_band values.
 *	For instance, for NL80211_BAND_2GHZ, bit 0 would be set
 *	(i.e. BIT(NL80211_BAND_2GHZ)).
 * @cluster_id: cluster ID used for NAN synchronization. This is a MAC address
 *	that can take a value from 50-6F-9A-01-00-00 to 50-6F-9A-01-FF-FF.
 *	If NULL, the device will pick a random Cluster ID.
 * @scan_period: period (in seconds) between NAN scans.
 * @scan_dwell_time: dwell time (in milliseconds) for NAN scans.
 * @discovery_beacon_interval: interval (in TUs) for discovery beacons.
 * @enable_dw_notification: flag to enable/disable discovery window
 *	notifications.
 * @band_cfgs: array of band specific configurations, indexed by
 *	&enum nl80211_band values.
 * @extra_nan_attrs: pointer to additional NAN attributes.
 * @extra_nan_attrs_len: length of the additional NAN attributes.
 * @vendor_elems: pointer to vendor-specific elements.
 * @vendor_elems_len: length of the vendor-specific elements.
 */
struct cfg80211_nan_conf {
	u8 master_pref;
	u8 bands;
	const u8 *cluster_id;
	u16 scan_period;
	u16 scan_dwell_time;
	u8 discovery_beacon_interval;
	bool enable_dw_notification;
	struct cfg80211_nan_band_config band_cfgs[NUM_NL80211_BANDS];
	const u8 *extra_nan_attrs;
	u16 extra_nan_attrs_len;
	const u8 *vendor_elems;
	u16 vendor_elems_len;
};

/**
 * enum cfg80211_nan_conf_changes - indicates changed fields in NAN
 * configuration
 *
 * @CFG80211_NAN_CONF_CHANGED_PREF: master preference
 * @CFG80211_NAN_CONF_CHANGED_BANDS: operating bands
 * @CFG80211_NAN_CONF_CHANGED_CONFIG: changed additional configuration.
 *	When this flag is set, it indicates that some additional attribute(s)
 *	(other then master_pref and bands) have been changed. In this case,
 *	all the unchanged attributes will be properly configured to their
 *	previous values. The driver doesn't need to store any
 *	previous configuration besides master_pref and bands.
 */
enum cfg80211_nan_conf_changes {
	CFG80211_NAN_CONF_CHANGED_PREF = BIT(0),
	CFG80211_NAN_CONF_CHANGED_BANDS = BIT(1),
	CFG80211_NAN_CONF_CHANGED_CONFIG = BIT(2),
};

/**
 * struct cfg80211_nan_func_filter - a NAN function Rx / Tx filter
 *
 * @filter: the content of the filter
 * @len: the length of the filter
 */
struct cfg80211_nan_func_filter {
	const u8 *filter;
	u8 len;
};

/**
 * struct cfg80211_nan_func - a NAN function
 *
 * @type: &enum nl80211_nan_function_type
 * @service_id: the service ID of the function
 * @publish_type: &nl80211_nan_publish_type
 * @close_range: if true, the range should be limited. Threshold is
 *	implementation specific.
 * @publish_bcast: if true, the solicited publish should be broadcasted
 * @subscribe_active: if true, the subscribe is active
 * @followup_id: the instance ID for follow up
 * @followup_reqid: the requester instance ID for follow up
 * @followup_dest: MAC address of the recipient of the follow up
 * @ttl: time to live counter in DW.
 * @serv_spec_info: Service Specific Info
 * @serv_spec_info_len: Service Specific Info length
 * @srf_include: if true, SRF is inclusive
 * @srf_bf: Bloom Filter
 * @srf_bf_len: Bloom Filter length
 * @srf_bf_idx: Bloom Filter index
 * @srf_macs: SRF MAC addresses
 * @srf_num_macs: number of MAC addresses in SRF
 * @rx_filters: rx filters that are matched with corresponding peer's tx_filter
 * @tx_filters: filters that should be transmitted in the SDF.
 * @num_rx_filters: length of &rx_filters.
 * @num_tx_filters: length of &tx_filters.
 * @instance_id: driver allocated id of the function.
 * @cookie: unique NAN function identifier.
 */
struct cfg80211_nan_func {
	enum nl80211_nan_function_type type;
	u8 service_id[NL80211_NAN_FUNC_SERVICE_ID_LEN];
	u8 publish_type;
	bool close_range;
	bool publish_bcast;
	bool subscribe_active;
	u8 followup_id;
	u8 followup_reqid;
	struct mac_address followup_dest;
	u32 ttl;
	const u8 *serv_spec_info;
	u8 serv_spec_info_len;
	bool srf_include;
	const u8 *srf_bf;
	u8 srf_bf_len;
	u8 srf_bf_idx;
	struct mac_address *srf_macs;
	int srf_num_macs;
	struct cfg80211_nan_func_filter *rx_filters;
	struct cfg80211_nan_func_filter *tx_filters;
	u8 num_tx_filters;
	u8 num_rx_filters;
	u8 instance_id;
	u64 cookie;
};

/**
 * struct cfg80211_pmk_conf - PMK configuration
 *
 * @aa: authenticator address
 * @pmk_len: PMK length in bytes.
 * @pmk: the PMK material
 * @pmk_r0_name: PMK-R0 Name. NULL if not applicable (i.e., the PMK
 *	is not PMK-R0). When pmk_r0_name is not NULL, the pmk field
 *	holds PMK-R0.
 */
struct cfg80211_pmk_conf {
	const u8 *aa;
	u8 pmk_len;
	const u8 *pmk;
	const u8 *pmk_r0_name;
};

/**
 * struct cfg80211_external_auth_params - Trigger External authentication.
 *
 * Commonly used across the external auth request and event interfaces.
 *
 * @action: action type / trigger for external authentication. Only significant
 *	for the authentication request event interface (driver to user space).
 * @bssid: BSSID of the peer with which the authentication has
 *	to happen. Used by both the authentication request event and
 *	authentication response command interface.
 * @ssid: SSID of the AP.  Used by both the authentication request event and
 *	authentication response command interface.
 * @key_mgmt_suite: AKM suite of the respective authentication. Used by the
 *	authentication request event interface.
 * @status: status code, %WLAN_STATUS_SUCCESS for successful authentication,
 *	use %WLAN_STATUS_UNSPECIFIED_FAILURE if user space cannot give you
 *	the real status code for failures. Used only for the authentication
 *	response command interface (user space to driver).
 * @pmkid: The identifier to refer a PMKSA.
 * @mld_addr: MLD address of the peer. Used by the authentication request event
 *	interface. Driver indicates this to enable MLO during the authentication
 *	offload to user space. Driver shall look at %NL80211_ATTR_MLO_SUPPORT
 *	flag capability in NL80211_CMD_CONNECT to know whether the user space
 *	supports enabling MLO during the authentication offload.
 *	User space should use the address of the interface (on which the
 *	authentication request event reported) as self MLD address. User space
 *	and driver should use MLD addresses in RA, TA and BSSID fields of
 *	authentication frames sent or received via cfg80211. The driver
 *	translates the MLD addresses to/from link addresses based on the link
 *	chosen for the authentication.
 */
struct cfg80211_external_auth_params {
	enum nl80211_external_auth_action action;
	u8 bssid[ETH_ALEN] __aligned(2);
	struct cfg80211_ssid ssid;
	unsigned int key_mgmt_suite;
	u16 status;
	const u8 *pmkid;
	u8 mld_addr[ETH_ALEN] __aligned(2);
};

/**
 * struct cfg80211_ftm_responder_stats - FTM responder statistics
 *
 * @filled: bitflag of flags using the bits of &enum nl80211_ftm_stats to
 *	indicate the relevant values in this struct for them
 * @success_num: number of FTM sessions in which all frames were successfully
 *	answered
 * @partial_num: number of FTM sessions in which part of frames were
 *	successfully answered
 * @failed_num: number of failed FTM sessions
 * @asap_num: number of ASAP FTM sessions
 * @non_asap_num: number of  non-ASAP FTM sessions
 * @total_duration_ms: total sessions durations - gives an indication
 *	of how much time the responder was busy
 * @unknown_triggers_num: number of unknown FTM triggers - triggers from
 *	initiators that didn't finish successfully the negotiation phase with
 *	the responder
 * @reschedule_requests_num: number of FTM reschedule requests - initiator asks
 *	for a new scheduling although it already has scheduled FTM slot
 * @out_of_window_triggers_num: total FTM triggers out of scheduled window
 */
struct cfg80211_ftm_responder_stats {
	u32 filled;
	u32 success_num;
	u32 partial_num;
	u32 failed_num;
	u32 asap_num;
	u32 non_asap_num;
	u64 total_duration_ms;
	u32 unknown_triggers_num;
	u32 reschedule_requests_num;
	u32 out_of_window_triggers_num;
};

/**
 * struct cfg80211_pmsr_ftm_result - FTM result
 * @failure_reason: if this measurement failed (PMSR status is
 *	%NL80211_PMSR_STATUS_FAILURE), this gives a more precise
 *	reason than just "failure"
 * @burst_index: if reporting partial results, this is the index
 *	in [0 .. num_bursts-1] of the burst that's being reported
 * @num_ftmr_attempts: number of FTM request frames transmitted
 * @num_ftmr_successes: number of FTM request frames acked
 * @busy_retry_time: if failure_reason is %NL80211_PMSR_FTM_FAILURE_PEER_BUSY,
 *	fill this to indicate in how many seconds a retry is deemed possible
 *	by the responder
 * @num_bursts_exp: actual number of bursts exponent negotiated
 * @burst_duration: actual burst duration negotiated
 * @ftms_per_burst: actual FTMs per burst negotiated
 * @burst_period: actual burst period negotiated in units of 100ms
 * @lci_len: length of LCI information (if present)
 * @civicloc_len: length of civic location information (if present)
 * @lci: LCI data (may be %NULL)
 * @civicloc: civic location data (may be %NULL)
 * @rssi_avg: average RSSI over FTM action frames reported
 * @rssi_spread: spread of the RSSI over FTM action frames reported
 * @tx_rate: bitrate for transmitted FTM action frame response
 * @rx_rate: bitrate of received FTM action frame
 * @rtt_avg: average of RTTs measured (must have either this or @dist_avg)
 * @rtt_variance: variance of RTTs measured (note that standard deviation is
 *	the square root of the variance)
 * @rtt_spread: spread of the RTTs measured
 * @dist_avg: average of distances (mm) measured
 *	(must have either this or @rtt_avg)
 * @dist_variance: variance of distances measured (see also @rtt_variance)
 * @dist_spread: spread of distances measured (see also @rtt_spread)
 * @num_ftmr_attempts_valid: @num_ftmr_attempts is valid
 * @num_ftmr_successes_valid: @num_ftmr_successes is valid
 * @rssi_avg_valid: @rssi_avg is valid
 * @rssi_spread_valid: @rssi_spread is valid
 * @tx_rate_valid: @tx_rate is valid
 * @rx_rate_valid: @rx_rate is valid
 * @rtt_avg_valid: @rtt_avg is valid
 * @rtt_variance_valid: @rtt_variance is valid
 * @rtt_spread_valid: @rtt_spread is valid
 * @dist_avg_valid: @dist_avg is valid
 * @dist_variance_valid: @dist_variance is valid
 * @dist_spread_valid: @dist_spread is valid
 */
struct cfg80211_pmsr_ftm_result {
	const u8 *lci;
	const u8 *civicloc;
	unsigned int lci_len;
	unsigned int civicloc_len;
	enum nl80211_peer_measurement_ftm_failure_reasons failure_reason;
	u32 num_ftmr_attempts, num_ftmr_successes;
	s16 burst_index;
	u8 busy_retry_time;
	u8 num_bursts_exp;
	u8 burst_duration;
	u8 ftms_per_burst;
	u16 burst_period;
	s32 rssi_avg;
	s32 rssi_spread;
	struct rate_info tx_rate, rx_rate;
	s64 rtt_avg;
	s64 rtt_variance;
	s64 rtt_spread;
	s64 dist_avg;
	s64 dist_variance;
	s64 dist_spread;

	u16 num_ftmr_attempts_valid:1,
	    num_ftmr_successes_valid:1,
	    rssi_avg_valid:1,
	    rssi_spread_valid:1,
	    tx_rate_valid:1,
	    rx_rate_valid:1,
	    rtt_avg_valid:1,
	    rtt_variance_valid:1,
	    rtt_spread_valid:1,
	    dist_avg_valid:1,
	    dist_variance_valid:1,
	    dist_spread_valid:1;
};

/**
 * struct cfg80211_pmsr_result - peer measurement result
 * @addr: address of the peer
 * @host_time: host time (use ktime_get_boottime() adjust to the time when the
 *	measurement was made)
 * @ap_tsf: AP's TSF at measurement time
 * @status: status of the measurement
 * @final: if reporting partial results, mark this as the last one; if not
 *	reporting partial results always set this flag
 * @ap_tsf_valid: indicates the @ap_tsf value is valid
 * @type: type of the measurement reported, note that we only support reporting
 *	one type at a time, but you can report multiple results separately and
 *	they're all aggregated for userspace.
 * @ftm: FTM result
 */
struct cfg80211_pmsr_result {
	u64 host_time, ap_tsf;
	enum nl80211_peer_measurement_status status;

	u8 addr[ETH_ALEN];

	u8 final:1,
	   ap_tsf_valid:1;

	enum nl80211_peer_measurement_type type;

	union {
		struct cfg80211_pmsr_ftm_result ftm;
	};
};

/**
 * struct cfg80211_pmsr_ftm_request_peer - FTM request data
 * @requested: indicates FTM is requested
 * @preamble: frame preamble to use
 * @burst_period: burst period to use
 * @asap: indicates to use ASAP mode
 * @num_bursts_exp: number of bursts exponent
 * @burst_duration: burst duration. If @trigger_based or @non_trigger_based is
 *	set, this is the burst duration in milliseconds, and zero means the
 *	device should pick an appropriate value based on @ftms_per_burst.
 * @ftms_per_burst: number of FTMs per burst
 * @ftmr_retries: number of retries for FTM request
 * @request_lci: request LCI information
 * @request_civicloc: request civic location information
 * @trigger_based: use trigger based ranging for the measurement
 *		 If neither @trigger_based nor @non_trigger_based is set,
 *		 EDCA based ranging will be used.
 * @non_trigger_based: use non trigger based ranging for the measurement
 *		 If neither @trigger_based nor @non_trigger_based is set,
 *		 EDCA based ranging will be used.
 * @lmr_feedback: negotiate for I2R LMR feedback. Only valid if either
 *		 @trigger_based or @non_trigger_based is set.
 * @rsta: Operate as the RSTA in the measurement. Only valid if @lmr_feedback
 *	and either @trigger_based or @non_trigger_based is set.
 * @bss_color: the bss color of the responder. Optional. Set to zero to
 *	indicate the driver should set the BSS color. Only valid if
 *	@non_trigger_based or @trigger_based is set.
 *
 * See also nl80211 for the respective attribute documentation.
 */
struct cfg80211_pmsr_ftm_request_peer {
	enum nl80211_preamble preamble;
	u16 burst_period;
	u8 requested:1,
	   asap:1,
	   request_lci:1,
	   request_civicloc:1,
	   trigger_based:1,
	   non_trigger_based:1,
	   lmr_feedback:1,
	   rsta:1;
	u8 num_bursts_exp;
	u8 burst_duration;
	u8 ftms_per_burst;
	u8 ftmr_retries;
	u8 bss_color;
};

/**
 * struct cfg80211_pmsr_request_peer - peer data for a peer measurement request
 * @addr: MAC address
 * @chandef: channel to use
 * @report_ap_tsf: report the associated AP's TSF
 * @ftm: FTM data, see &struct cfg80211_pmsr_ftm_request_peer
 */
struct cfg80211_pmsr_request_peer {
	u8 addr[ETH_ALEN];
	struct cfg80211_chan_def chandef;
	u8 report_ap_tsf:1;
	struct cfg80211_pmsr_ftm_request_peer ftm;
};

/**
 * struct cfg80211_pmsr_request - peer measurement request
 * @cookie: cookie, set by cfg80211
 * @nl_portid: netlink portid - used by cfg80211
 * @drv_data: driver data for this request, if required for aborting,
 *	not otherwise freed or anything by cfg80211
 * @mac_addr: MAC address used for (randomised) request
 * @mac_addr_mask: MAC address mask used for randomisation, bits that
 *	are 0 in the mask should be randomised, bits that are 1 should
 *	be taken from the @mac_addr
 * @list: used by cfg80211 to hold on to the request
 * @timeout: timeout (in milliseconds) for the whole operation, if
 *	zero it means there's no timeout
 * @n_peers: number of peers to do measurements with
 * @peers: per-peer measurement request data
 */
struct cfg80211_pmsr_request {
	u64 cookie;
	void *drv_data;
	u32 n_peers;
	u32 nl_portid;

	u32 timeout;

	u8 mac_addr[ETH_ALEN] __aligned(2);
	u8 mac_addr_mask[ETH_ALEN] __aligned(2);

	struct list_head list;

	struct cfg80211_pmsr_request_peer peers[] __counted_by(n_peers);
};

/**
 * struct cfg80211_update_owe_info - OWE Information
 *
 * This structure provides information needed for the drivers to offload OWE
 * (Opportunistic Wireless Encryption) processing to the user space.
 *
 * Commonly used across update_owe_info request and event interfaces.
 *
 * @peer: MAC address of the peer device for which the OWE processing
 *	has to be done.
 * @status: status code, %WLAN_STATUS_SUCCESS for successful OWE info
 *	processing, use %WLAN_STATUS_UNSPECIFIED_FAILURE if user space
 *	cannot give you the real status code for failures. Used only for
 *	OWE update request command interface (user space to driver).
 * @ie: IEs obtained from the peer or constructed by the user space. These are
 *	the IEs of the remote peer in the event from the host driver and
 *	the constructed IEs by the user space in the request interface.
 * @ie_len: Length of IEs in octets.
 * @assoc_link_id: MLO link ID of the AP, with which (re)association requested
 *	by peer. This will be filled by driver for both MLO and non-MLO station
 *	connections when the AP affiliated with an MLD. For non-MLD AP mode, it
 *	will be -1. Used only with OWE update event (driver to user space).
 * @peer_mld_addr: For MLO connection, MLD address of the peer. For non-MLO
 *	connection, it will be all zeros. This is applicable only when
 *	@assoc_link_id is not -1, i.e., the AP affiliated with an MLD. Used only
 *	with OWE update event (driver to user space).
 */
struct cfg80211_update_owe_info {
	u8 peer[ETH_ALEN] __aligned(2);
	u16 status;
	const u8 *ie;
	size_t ie_len;
	int assoc_link_id;
	u8 peer_mld_addr[ETH_ALEN] __aligned(2);
};

/**
 * struct mgmt_frame_regs - management frame registrations data
 * @global_stypes: bitmap of management frame subtypes registered
 *	for the entire device
 * @interface_stypes: bitmap of management frame subtypes registered
 *	for the given interface
 * @global_mcast_stypes: mcast RX is needed globally for these subtypes
 * @interface_mcast_stypes: mcast RX is needed on this interface
 *	for these subtypes
 */
struct mgmt_frame_regs {
	u32 global_stypes, interface_stypes;
	u32 global_mcast_stypes, interface_mcast_stypes;
};

/**
 * struct cfg80211_ops - backend description for wireless configuration
 *
 * This struct is registered by fullmac card drivers and/or wireless stacks
 * in order to handle configuration requests on their interfaces.
 *
 * All callbacks except where otherwise noted should return 0
 * on success or a negative error code.
 *
 * All operations are invoked with the wiphy mutex held. The RTNL may be
 * held in addition (due to wireless extensions) but this cannot be relied
 * upon except in cases where documented below. Note that due to ordering,
 * the RTNL also cannot be acquired in any handlers.
 *
 * @suspend: wiphy device needs to be suspended. The variable @wow will
 *	be %NULL or contain the enabled Wake-on-Wireless triggers that are
 *	configured for the device.
 * @resume: wiphy device needs to be resumed
 * @set_wakeup: Called when WoWLAN is enabled/disabled, use this callback
 *	to call device_set_wakeup_enable() to enable/disable wakeup from
 *	the device.
 *
 * @add_virtual_intf: create a new virtual interface with the given name,
 *	must set the struct wireless_dev's iftype. Beware: You must create
 *	the new netdev in the wiphy's network namespace! Returns the struct
 *	wireless_dev, or an ERR_PTR. For P2P device wdevs, the driver must
 *	also set the address member in the wdev.
 *	This additionally holds the RTNL to be able to do netdev changes.
 *
 * @del_virtual_intf: remove the virtual interface
 *	This additionally holds the RTNL to be able to do netdev changes.
 *
 * @change_virtual_intf: change type/configuration of virtual interface,
 *	keep the struct wireless_dev's iftype updated.
 *	This additionally holds the RTNL to be able to do netdev changes.
 *
 * @add_intf_link: Add a new MLO link to the given interface. Note that
 *	the wdev->link[] data structure has been updated, so the new link
 *	address is available.
 * @del_intf_link: Remove an MLO link from the given interface.
 *
 * @add_key: add a key with the given parameters. @mac_addr will be %NULL
 *	when adding a group key. @link_id will be -1 for non-MLO connection.
 *	For MLO connection, @link_id will be >= 0 for group key and -1 for
 *	pairwise key, @mac_addr will be peer's MLD address for MLO pairwise key.
 *
 * @get_key: get information about the key with the given parameters.
 *	@mac_addr will be %NULL when requesting information for a group
 *	key. All pointers given to the @callback function need not be valid
 *	after it returns. This function should return an error if it is
 *	not possible to retrieve the key, -ENOENT if it doesn't exist.
 *	@link_id will be -1 for non-MLO connection. For MLO connection,
 *	@link_id will be >= 0 for group key and -1 for pairwise key, @mac_addr
 *	will be peer's MLD address for MLO pairwise key.
 *
 * @del_key: remove a key given the @mac_addr (%NULL for a group key)
 *	and @key_index, return -ENOENT if the key doesn't exist. @link_id will
 *	be -1 for non-MLO connection. For MLO connection, @link_id will be >= 0
 *	for group key and -1 for pairwise key, @mac_addr will be peer's MLD
 *	address for MLO pairwise key.
 *
 * @set_default_key: set the default key on an interface. @link_id will be >= 0
 *	for MLO connection and -1 for non-MLO connection.
 *
 * @set_default_mgmt_key: set the default management frame key on an interface.
 *	@link_id will be >= 0 for MLO connection and -1 for non-MLO connection.
 *
 * @set_default_beacon_key: set the default Beacon frame key on an interface.
 *	@link_id will be >= 0 for MLO connection and -1 for non-MLO connection.
 *
 * @set_rekey_data: give the data necessary for GTK rekeying to the driver
 *
 * @start_ap: Start acting in AP mode defined by the parameters.
 * @change_beacon: Change the beacon parameters for an access point mode
 *	interface. This should reject the call when AP mode wasn't started.
 * @stop_ap: Stop being an AP, including stopping beaconing.
 *
 * @add_station: Add a new station.
 * @del_station: Remove a station
 * @change_station: Modify a given station. Note that flags changes are not much
 *	validated in cfg80211, in particular the auth/assoc/authorized flags
 *	might come to the driver in invalid combinations -- make sure to check
 *	them, also against the existing state! Drivers must call
 *	cfg80211_check_station_change() to validate the information.
 * @get_station: get station information for the station identified by @mac
 * @dump_station: dump station callback -- resume dump at index @idx
 *
 * @add_mpath: add a fixed mesh path
 * @del_mpath: delete a given mesh path
 * @change_mpath: change a given mesh path
 * @get_mpath: get a mesh path for the given parameters
 * @dump_mpath: dump mesh path callback -- resume dump at index @idx
 * @get_mpp: get a mesh proxy path for the given parameters
 * @dump_mpp: dump mesh proxy path callback -- resume dump at index @idx
 * @join_mesh: join the mesh network with the specified parameters
 *	(invoked with the wireless_dev mutex held)
 * @leave_mesh: leave the current mesh network
 *	(invoked with the wireless_dev mutex held)
 *
 * @get_mesh_config: Get the current mesh configuration
 *
 * @update_mesh_config: Update mesh parameters on a running mesh.
 *	The mask is a bitfield which tells us which parameters to
 *	set, and which to leave alone.
 *
 * @change_bss: Modify parameters for a given BSS.
 *
 * @inform_bss: Called by cfg80211 while being informed about new BSS data
 *	for every BSS found within the reported data or frame. This is called
 *	from within the cfg8011 inform_bss handlers while holding the bss_lock.
 *	The data parameter is passed through from drv_data inside
 *	struct cfg80211_inform_bss.
 *	The new IE data for the BSS is explicitly passed.
 *
 * @set_txq_params: Set TX queue parameters
 *
 * @libertas_set_mesh_channel: Only for backward compatibility for libertas,
 *	as it doesn't implement join_mesh and needs to set the channel to
 *	join the mesh instead.
 *
 * @set_monitor_channel: Set the monitor mode channel for the device. If other
 *	interfaces are active this callback should reject the configuration.
 *	If no interfaces are active or the device is down, the channel should
 *	be stored for when a monitor interface becomes active.
 *
 * @scan: Request to do a scan. If returning zero, the scan request is given
 *	the driver, and will be valid until passed to cfg80211_scan_done().
 *	For scan results, call cfg80211_inform_bss(); you can call this outside
 *	the scan/scan_done bracket too.
 * @abort_scan: Tell the driver to abort an ongoing scan. The driver shall
 *	indicate the status of the scan through cfg80211_scan_done().
 *
 * @auth: Request to authenticate with the specified peer
 *	(invoked with the wireless_dev mutex held)
 * @assoc: Request to (re)associate with the specified peer
 *	(invoked with the wireless_dev mutex held)
 * @deauth: Request to deauthenticate from the specified peer
 *	(invoked with the wireless_dev mutex held)
 * @disassoc: Request to disassociate from the specified peer
 *	(invoked with the wireless_dev mutex held)
 *
 * @connect: Connect to the ESS with the specified parameters. When connected,
 *	call cfg80211_connect_result()/cfg80211_connect_bss() with status code
 *	%WLAN_STATUS_SUCCESS. If the connection fails for some reason, call
 *	cfg80211_connect_result()/cfg80211_connect_bss() with the status code
 *	from the AP or cfg80211_connect_timeout() if no frame with status code
 *	was received.
 *	The driver is allowed to roam to other BSSes within the ESS when the
 *	other BSS matches the connect parameters. When such roaming is initiated
 *	by the driver, the driver is expected to verify that the target matches
 *	the configured security parameters and to use Reassociation Request
 *	frame instead of Association Request frame.
 *	The connect function can also be used to request the driver to perform a
 *	specific roam when connected to an ESS. In that case, the prev_bssid
 *	parameter is set to the BSSID of the currently associated BSS as an
 *	indication of requesting reassociation.
 *	In both the driver-initiated and new connect() call initiated roaming
 *	cases, the result of roaming is indicated with a call to
 *	cfg80211_roamed(). (invoked with the wireless_dev mutex held)
 * @update_connect_params: Update the connect parameters while connected to a
 *	BSS. The updated parameters can be used by driver/firmware for
 *	subsequent BSS selection (roaming) decisions and to form the
 *	Authentication/(Re)Association Request frames. This call does not
 *	request an immediate disassociation or reassociation with the current
 *	BSS, i.e., this impacts only subsequent (re)associations. The bits in
 *	changed are defined in &enum cfg80211_connect_params_changed.
 *	(invoked with the wireless_dev mutex held)
 * @disconnect: Disconnect from the BSS/ESS or stop connection attempts if
 *      connection is in progress. Once done, call cfg80211_disconnected() in
 *      case connection was already established (invoked with the
 *      wireless_dev mutex held), otherwise call cfg80211_connect_timeout().
 *
 * @join_ibss: Join the specified IBSS (or create if necessary). Once done, call
 *	cfg80211_ibss_joined(), also call that function when changing BSSID due
 *	to a merge.
 *	(invoked with the wireless_dev mutex held)
 * @leave_ibss: Leave the IBSS.
 *	(invoked with the wireless_dev mutex held)
 *
 * @set_mcast_rate: Set the specified multicast rate (only if vif is in ADHOC or
 *	MESH mode)
 *
 * @set_wiphy_params: Notify that wiphy parameters have changed;
 *	@changed bitfield (see &enum wiphy_params_flags) describes which values
 *	have changed. The actual parameter values are available in
 *	struct wiphy. If returning an error, no value should be changed.
 *
 * @set_tx_power: set the transmit power according to the parameters,
 *	the power passed is in mBm, to get dBm use MBM_TO_DBM(). The
 *	wdev may be %NULL if power was set for the wiphy, and will
 *	always be %NULL unless the driver supports per-vif TX power
 *	(as advertised by the nl80211 feature flag.)
 * @get_tx_power: store the current TX power into the dbm variable;
 *	return 0 if successful
 *
 * @rfkill_poll: polls the hw rfkill line, use cfg80211 reporting
 *	functions to adjust rfkill hw state
 *
 * @dump_survey: get site survey information.
 *
 * @remain_on_channel: Request the driver to remain awake on the specified
 *	channel for the specified duration to complete an off-channel
 *	operation (e.g., public action frame exchange). When the driver is
 *	ready on the requested channel, it must indicate this with an event
 *	notification by calling cfg80211_ready_on_channel().
 * @cancel_remain_on_channel: Cancel an on-going remain-on-channel operation.
 *	This allows the operation to be terminated prior to timeout based on
 *	the duration value.
 * @mgmt_tx: Transmit a management frame.
 * @mgmt_tx_cancel_wait: Cancel the wait time from transmitting a management
 *	frame on another channel
 *
 * @testmode_cmd: run a test mode command; @wdev may be %NULL
 * @testmode_dump: Implement a test mode dump. The cb->args[2] and up may be
 *	used by the function, but 0 and 1 must not be touched. Additionally,
 *	return error codes other than -ENOBUFS and -ENOENT will terminate the
 *	dump and return to userspace with an error, so be careful. If any data
 *	was passed in from userspace then the data/len arguments will be present
 *	and point to the data contained in %NL80211_ATTR_TESTDATA.
 *
 * @set_bitrate_mask: set the bitrate mask configuration
 *
 * @set_pmksa: Cache a PMKID for a BSSID. This is mostly useful for fullmac
 *	devices running firmwares capable of generating the (re) association
 *	RSN IE. It allows for faster roaming between WPA2 BSSIDs.
 * @del_pmksa: Delete a cached PMKID.
 * @flush_pmksa: Flush all cached PMKIDs.
 * @set_power_mgmt: Configure WLAN power management. A timeout value of -1
 *	allows the driver to adjust the dynamic ps timeout value.
 * @set_cqm_rssi_config: Configure connection quality monitor RSSI threshold.
 *	After configuration, the driver should (soon) send an event indicating
 *	the current level is above/below the configured threshold; this may
 *	need some care when the configuration is changed (without first being
 *	disabled.)
 * @set_cqm_rssi_range_config: Configure two RSSI thresholds in the
 *	connection quality monitor.  An event is to be sent only when the
 *	signal level is found to be outside the two values.  The driver should
 *	set %NL80211_EXT_FEATURE_CQM_RSSI_LIST if this method is implemented.
 *	If it is provided then there's no point providing @set_cqm_rssi_config.
 * @set_cqm_txe_config: Configure connection quality monitor TX error
 *	thresholds.
 * @sched_scan_start: Tell the driver to start a scheduled scan.
 * @sched_scan_stop: Tell the driver to stop an ongoing scheduled scan with
 *	given request id. This call must stop the scheduled scan and be ready
 *	for starting a new one before it returns, i.e. @sched_scan_start may be
 *	called immediately after that again and should not fail in that case.
 *	The driver should not call cfg80211_sched_scan_stopped() for a requested
 *	stop (when this method returns 0).
 *
 * @update_mgmt_frame_registrations: Notify the driver that management frame
 *	registrations were updated. The callback is allowed to sleep.
 *
 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device.
 *	Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may
 *	reject TX/RX mask combinations they cannot support by returning -EINVAL
 *	(also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX).
 *
 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant).
 *
 * @tdls_mgmt: Transmit a TDLS management frame.
 * @tdls_oper: Perform a high-level TDLS operation (e.g. TDLS link setup).
 *
 * @probe_client: probe an associated client, must return a cookie that it
 *	later passes to cfg80211_probe_status().
 *
 * @set_noack_map: Set the NoAck Map for the TIDs.
 *
 * @get_channel: Get the current operating channel for the virtual interface.
 *	For monitor interfaces, it should return %NULL unless there's a single
 *	current monitoring channel.
 *
 * @start_p2p_device: Start the given P2P device.
 * @stop_p2p_device: Stop the given P2P device.
 *
 * @set_mac_acl: Sets MAC address control list in AP and P2P GO mode.
 *	Parameters include ACL policy, an array of MAC address of stations
 *	and the number of MAC addresses. If there is already a list in driver
 *	this new list replaces the existing one. Driver has to clear its ACL
 *	when number of MAC addresses entries is passed as 0. Drivers which
 *	advertise the support for MAC based ACL have to implement this callback.
 *
 * @start_radar_detection: Start radar detection in the driver.
 *
 * @end_cac: End running CAC, probably because a related CAC
 *	was finished on another phy.
 *
 * @update_ft_ies: Provide updated Fast BSS Transition information to the
 *	driver. If the SME is in the driver/firmware, this information can be
 *	used in building Authentication and Reassociation Request frames.
 *
 * @crit_proto_start: Indicates a critical protocol needs more link reliability
 *	for a given duration (milliseconds). The protocol is provided so the
 *	driver can take the most appropriate actions.
 * @crit_proto_stop: Indicates critical protocol no longer needs increased link
 *	reliability. This operation can not fail.
 * @set_coalesce: Set coalesce parameters.
 *
 * @channel_switch: initiate channel-switch procedure (with CSA). Driver is
 *	responsible for veryfing if the switch is possible. Since this is
 *	inherently tricky driver may decide to disconnect an interface later
 *	with cfg80211_stop_iface(). This doesn't mean driver can accept
 *	everything. It should do it's best to verify requests and reject them
 *	as soon as possible.
 *
 * @set_qos_map: Set QoS mapping information to the driver
 *
 * @set_ap_chanwidth: Set the AP (including P2P GO) mode channel width for the
 *	given interface This is used e.g. for dynamic HT 20/40 MHz channel width
 *	changes during the lifetime of the BSS.
 *
 * @add_tx_ts: validate (if admitted_time is 0) or add a TX TS to the device
 *	with the given parameters; action frame exchange has been handled by
 *	userspace so this just has to modify the TX path to take the TS into
 *	account.
 *	If the admitted time is 0 just validate the parameters to make sure
 *	the session can be created at all; it is valid to just always return
 *	success for that but that may result in inefficient behaviour (handshake
 *	with the peer followed by immediate teardown when the addition is later
 *	rejected)
 * @del_tx_ts: remove an existing TX TS
 *
 * @join_ocb: join the OCB network with the specified parameters
 *	(invoked with the wireless_dev mutex held)
 * @leave_ocb: leave the current OCB network
 *	(invoked with the wireless_dev mutex held)
 *
 * @tdls_channel_switch: Start channel-switching with a TDLS peer. The driver
 *	is responsible for continually initiating channel-switching operations
 *	and returning to the base channel for communication with the AP.
 * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both
 *	peers must be on the base channel when the call completes.
 * @start_nan: Start the NAN interface.
 * @stop_nan: Stop the NAN interface.
 * @add_nan_func: Add a NAN function. Returns negative value on failure.
 *	On success @nan_func ownership is transferred to the driver and
 *	it may access it outside of the scope of this function. The driver
 *	should free the @nan_func when no longer needed by calling
 *	cfg80211_free_nan_func().
 *	On success the driver should assign an instance_id in the
 *	provided @nan_func.
 * @del_nan_func: Delete a NAN function.
 * @nan_change_conf: changes NAN configuration. The changed parameters must
 *	be specified in @changes (using &enum cfg80211_nan_conf_changes);
 *	All other parameters must be ignored.
 *
 * @set_multicast_to_unicast: configure multicast to unicast conversion for BSS
 *
 * @get_txq_stats: Get TXQ stats for interface or phy. If wdev is %NULL, this
 *      function should return phy stats, and interface stats otherwise.
 *
 * @set_pmk: configure the PMK to be used for offloaded 802.1X 4-Way handshake.
 *	If not deleted through @del_pmk the PMK remains valid until disconnect
 *	upon which the driver should clear it.
 *	(invoked with the wireless_dev mutex held)
 * @del_pmk: delete the previously configured PMK for the given authenticator.
 *	(invoked with the wireless_dev mutex held)
 *
 * @external_auth: indicates result of offloaded authentication processing from
 *     user space
 *
 * @tx_control_port: TX a control port frame (EAPoL).  The noencrypt parameter
 *	tells the driver that the frame should not be encrypted.
 *
 * @get_ftm_responder_stats: Retrieve FTM responder statistics, if available.
 *	Statistics should be cumulative, currently no way to reset is provided.
 * @start_pmsr: start peer measurement (e.g. FTM)
 * @abort_pmsr: abort peer measurement
 *
 * @update_owe_info: Provide updated OWE info to driver. Driver implementing SME
 *	but offloading OWE processing to the user space will get the updated
 *	DH IE through this interface.
 *
 * @probe_mesh_link: Probe direct Mesh peer's link quality by sending data frame
 *	and overrule HWMP path selection algorithm.
 * @set_tid_config: TID specific configuration, this can be peer or BSS specific
 *	This callback may sleep.
 * @reset_tid_config: Reset TID specific configuration for the peer, for the
 *	given TIDs. This callback may sleep.
 *
 * @set_sar_specs: Update the SAR (TX power) settings.
 *
 * @color_change: Initiate a color change.
 *
 * @set_fils_aad: Set FILS AAD data to the AP driver so that the driver can use
 *	those to decrypt (Re)Association Request and encrypt (Re)Association
 *	Response frame.
 *
 * @set_radar_background: Configure dedicated offchannel chain available for
 *	radar/CAC detection on some hw. This chain can't be used to transmit
 *	or receive frames and it is bounded to a running wdev.
 *	Background radar/CAC detection allows to avoid the CAC downtime
 *	switching to a different channel during CAC detection on the selected
 *	radar channel.
 *	The caller is expected to set chandef pointer to NULL in order to
 *	disable background CAC/radar detection.
 * @add_link_station: Add a link to a station.
 * @mod_link_station: Modify a link of a station.
 * @del_link_station: Remove a link of a station.
 *
 * @set_hw_timestamp: Enable/disable HW timestamping of TM/FTM frames.
 * @set_ttlm: set the TID to link mapping.
 * @set_epcs: Enable/Disable EPCS for station mode.
 * @get_radio_mask: get bitmask of radios in use.
 *	(invoked with the wiphy mutex held)
 * @assoc_ml_reconf: Request a non-AP MLO connection to perform ML
 *	reconfiguration, i.e., add and/or remove links to/from the
 *	association using ML reconfiguration action frames. Successfully added
 *	links will be added to the set of valid links. Successfully removed
 *	links will be removed from the set of valid links. The driver must
 *	indicate removed links by calling cfg80211_links_removed() and added
 *	links by calling cfg80211_mlo_reconf_add_done(). When calling
 *	cfg80211_mlo_reconf_add_done() the bss pointer must be given for each
 *	link for which MLO reconfiguration 'add' operation was requested.
 */
struct cfg80211_ops {
	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
	int	(*resume)(struct wiphy *wiphy);
	void	(*set_wakeup)(struct wiphy *wiphy, bool enabled);

	struct wireless_dev * (*add_virtual_intf)(struct wiphy *wiphy,
						  const char *name,
						  unsigned char name_assign_type,
						  enum nl80211_iftype type,
						  struct vif_params *params);
	int	(*del_virtual_intf)(struct wiphy *wiphy,
				    struct wireless_dev *wdev);
	int	(*change_virtual_intf)(struct wiphy *wiphy,
				       struct net_device *dev,
				       enum nl80211_iftype type,
				       struct vif_params *params);

	int	(*add_intf_link)(struct wiphy *wiphy,
				 struct wireless_dev *wdev,
				 unsigned int link_id);
	void	(*del_intf_link)(struct wiphy *wiphy,
				 struct wireless_dev *wdev,
				 unsigned int link_id);

	int	(*add_key)(struct wiphy *wiphy, struct net_device *netdev,
			   int link_id, u8 key_index, bool pairwise,
			   const u8 *mac_addr, struct key_params *params);
	int	(*get_key)(struct wiphy *wiphy, struct net_device *netdev,
			   int link_id, u8 key_index, bool pairwise,
			   const u8 *mac_addr, void *cookie,
			   void (*callback)(void *cookie, struct key_params*));
	int	(*del_key)(struct wiphy *wiphy, struct net_device *netdev,
			   int link_id, u8 key_index, bool pairwise,
			   const u8 *mac_addr);
	int	(*set_default_key)(struct wiphy *wiphy,
				   struct net_device *netdev, int link_id,
				   u8 key_index, bool unicast, bool multicast);
	int	(*set_default_mgmt_key)(struct wiphy *wiphy,
					struct net_device *netdev, int link_id,
					u8 key_index);
	int	(*set_default_beacon_key)(struct wiphy *wiphy,
					  struct net_device *netdev,
					  int link_id,
					  u8 key_index);

	int	(*start_ap)(struct wiphy *wiphy, struct net_device *dev,
			    struct cfg80211_ap_settings *settings);
	int	(*change_beacon)(struct wiphy *wiphy, struct net_device *dev,
				 struct cfg80211_ap_update *info);
	int	(*stop_ap)(struct wiphy *wiphy, struct net_device *dev,
			   unsigned int link_id);


	int	(*add_station)(struct wiphy *wiphy, struct net_device *dev,
			       const u8 *mac,
			       struct station_parameters *params);
	int	(*del_station)(struct wiphy *wiphy, struct net_device *dev,
			       struct station_del_parameters *params);
	int	(*change_station)(struct wiphy *wiphy, struct net_device *dev,
				  const u8 *mac,
				  struct station_parameters *params);
	int	(*get_station)(struct wiphy *wiphy, struct net_device *dev,
			       const u8 *mac, struct station_info *sinfo);
	int	(*dump_station)(struct wiphy *wiphy, struct net_device *dev,
				int idx, u8 *mac, struct station_info *sinfo);

	int	(*add_mpath)(struct wiphy *wiphy, struct net_device *dev,
			       const u8 *dst, const u8 *next_hop);
	int	(*del_mpath)(struct wiphy *wiphy, struct net_device *dev,
			       const u8 *dst);
	int	(*change_mpath)(struct wiphy *wiphy, struct net_device *dev,
				  const u8 *dst, const u8 *next_hop);
	int	(*get_mpath)(struct wiphy *wiphy, struct net_device *dev,
			     u8 *dst, u8 *next_hop, struct mpath_info *pinfo);
	int	(*dump_mpath)(struct wiphy *wiphy, struct net_device *dev,
			      int idx, u8 *dst, u8 *next_hop,
			      struct mpath_info *pinfo);
	int	(*get_mpp)(struct wiphy *wiphy, struct net_device *dev,
			   u8 *dst, u8 *mpp, struct mpath_info *pinfo);
	int	(*dump_mpp)(struct wiphy *wiphy, struct net_device *dev,
			    int idx, u8 *dst, u8 *mpp,
			    struct mpath_info *pinfo);
	int	(*get_mesh_config)(struct wiphy *wiphy,
				struct net_device *dev,
				struct mesh_config *conf);
	int	(*update_mesh_config)(struct wiphy *wiphy,
				      struct net_device *dev, u32 mask,
				      const struct mesh_config *nconf);
	int	(*join_mesh)(struct wiphy *wiphy, struct net_device *dev,
			     const struct mesh_config *conf,
			     const struct mesh_setup *setup);
	int	(*leave_mesh)(struct wiphy *wiphy, struct net_device *dev);

	int	(*join_ocb)(struct wiphy *wiphy, struct net_device *dev,
			    struct ocb_setup *setup);
	int	(*leave_ocb)(struct wiphy *wiphy, struct net_device *dev);

	int	(*change_bss)(struct wiphy *wiphy, struct net_device *dev,
			      struct bss_parameters *params);

	void	(*inform_bss)(struct wiphy *wiphy, struct cfg80211_bss *bss,
			      const struct cfg80211_bss_ies *ies, void *data);

	int	(*set_txq_params)(struct wiphy *wiphy, struct net_device *dev,
				  struct ieee80211_txq_params *params);

	int	(*libertas_set_mesh_channel)(struct wiphy *wiphy,
					     struct net_device *dev,
					     struct ieee80211_channel *chan);

	int	(*set_monitor_channel)(struct wiphy *wiphy,
				       struct net_device *dev,
				       struct cfg80211_chan_def *chandef);

	int	(*scan)(struct wiphy *wiphy,
			struct cfg80211_scan_request *request);
	void	(*abort_scan)(struct wiphy *wiphy, struct wireless_dev *wdev);

	int	(*auth)(struct wiphy *wiphy, struct net_device *dev,
			struct cfg80211_auth_request *req);
	int	(*assoc)(struct wiphy *wiphy, struct net_device *dev,
			 struct cfg80211_assoc_request *req);
	int	(*deauth)(struct wiphy *wiphy, struct net_device *dev,
			  struct cfg80211_deauth_request *req);
	int	(*disassoc)(struct wiphy *wiphy, struct net_device *dev,
			    struct cfg80211_disassoc_request *req);

	int	(*connect)(struct wiphy *wiphy, struct net_device *dev,
			   struct cfg80211_connect_params *sme);
	int	(*update_connect_params)(struct wiphy *wiphy,
					 struct net_device *dev,
					 struct cfg80211_connect_params *sme,
					 u32 changed);
	int	(*disconnect)(struct wiphy *wiphy, struct net_device *dev,
			      u16 reason_code);

	int	(*join_ibss)(struct wiphy *wiphy, struct net_device *dev,
			     struct cfg80211_ibss_params *params);
	int	(*leave_ibss)(struct wiphy *wiphy, struct net_device *dev);

	int	(*set_mcast_rate)(struct wiphy *wiphy, struct net_device *dev,
				  int rate[NUM_NL80211_BANDS]);

	int	(*set_wiphy_params)(struct wiphy *wiphy, int radio_idx,
				    u32 changed);

	int	(*set_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
				int radio_idx,
				enum nl80211_tx_power_setting type, int mbm);
	int	(*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
				int radio_idx, unsigned int link_id, int *dbm);

	void	(*rfkill_poll)(struct wiphy *wiphy);

#ifdef CONFIG_NL80211_TESTMODE
	int	(*testmode_cmd)(struct wiphy *wiphy, struct wireless_dev *wdev,
				void *data, int len);
	int	(*testmode_dump)(struct wiphy *wiphy, struct sk_buff *skb,
				 struct netlink_callback *cb,
				 void *data, int len);
#endif

	int	(*set_bitrate_mask)(struct wiphy *wiphy,
				    struct net_device *dev,
				    unsigned int link_id,
				    const u8 *peer,
				    const struct cfg80211_bitrate_mask *mask);

	int	(*dump_survey)(struct wiphy *wiphy, struct net_device *netdev,
			int idx, struct survey_info *info);

	int	(*set_pmksa)(struct wiphy *wiphy, struct net_device *netdev,
			     struct cfg80211_pmksa *pmksa);
	int	(*del_pmksa)(struct wiphy *wiphy, struct net_device *netdev,
			     struct cfg80211_pmksa *pmksa);
	int	(*flush_pmksa)(struct wiphy *wiphy, struct net_device *netdev);

	int	(*remain_on_channel)(struct wiphy *wiphy,
				     struct wireless_dev *wdev,
				     struct ieee80211_channel *chan,
				     unsigned int duration,
				     u64 *cookie);
	int	(*cancel_remain_on_channel)(struct wiphy *wiphy,
					    struct wireless_dev *wdev,
					    u64 cookie);

	int	(*mgmt_tx)(struct wiphy *wiphy, struct wireless_dev *wdev,
			   struct cfg80211_mgmt_tx_params *params,
			   u64 *cookie);
	int	(*mgmt_tx_cancel_wait)(struct wiphy *wiphy,
				       struct wireless_dev *wdev,
				       u64 cookie);

	int	(*set_power_mgmt)(struct wiphy *wiphy, struct net_device *dev,
				  bool enabled, int timeout);

	int	(*set_cqm_rssi_config)(struct wiphy *wiphy,
				       struct net_device *dev,
				       s32 rssi_thold, u32 rssi_hyst);

	int	(*set_cqm_rssi_range_config)(struct wiphy *wiphy,
					     struct net_device *dev,
					     s32 rssi_low, s32 rssi_high);

	int	(*set_cqm_txe_config)(struct wiphy *wiphy,
				      struct net_device *dev,
				      u32 rate, u32 pkts, u32 intvl);

	void	(*update_mgmt_frame_registrations)(struct wiphy *wiphy,
						   struct wireless_dev *wdev,
						   struct mgmt_frame_regs *upd);

	int	(*set_antenna)(struct wiphy *wiphy, int radio_idx,
			       u32 tx_ant, u32 rx_ant);
	int	(*get_antenna)(struct wiphy *wiphy, int radio_idx,
			       u32 *tx_ant, u32 *rx_ant);

	int	(*sched_scan_start)(struct wiphy *wiphy,
				struct net_device *dev,
				struct cfg80211_sched_scan_request *request);
	int	(*sched_scan_stop)(struct wiphy *wiphy, struct net_device *dev,
				   u64 reqid);

	int	(*set_rekey_data)(struct wiphy *wiphy, struct net_device *dev,
				  struct cfg80211_gtk_rekey_data *data);

	int	(*tdls_mgmt)(struct wiphy *wiphy, struct net_device *dev,
			     const u8 *peer, int link_id,
			     u8 action_code, u8 dialog_token, u16 status_code,
			     u32 peer_capability, bool initiator,
			     const u8 *buf, size_t len);
	int	(*tdls_oper)(struct wiphy *wiphy, struct net_device *dev,
			     const u8 *peer, enum nl80211_tdls_operation oper);

	int	(*probe_client)(struct wiphy *wiphy, struct net_device *dev,
				const u8 *peer, u64 *cookie);

	int	(*set_noack_map)(struct wiphy *wiphy,
				  struct net_device *dev,
				  u16 noack_map);

	int	(*get_channel)(struct wiphy *wiphy,
			       struct wireless_dev *wdev,
			       unsigned int link_id,
			       struct cfg80211_chan_def *chandef);

	int	(*start_p2p_device)(struct wiphy *wiphy,
				    struct wireless_dev *wdev);
	void	(*stop_p2p_device)(struct wiphy *wiphy,
				   struct wireless_dev *wdev);

	int	(*set_mac_acl)(struct wiphy *wiphy, struct net_device *dev,
			       const struct cfg80211_acl_data *params);

	int	(*start_radar_detection)(struct wiphy *wiphy,
					 struct net_device *dev,
					 struct cfg80211_chan_def *chandef,
					 u32 cac_time_ms, int link_id);
	void	(*end_cac)(struct wiphy *wiphy,
			   struct net_device *dev, unsigned int link_id);
	int	(*update_ft_ies)(struct wiphy *wiphy, struct net_device *dev,
				 struct cfg80211_update_ft_ies_params *ftie);
	int	(*crit_proto_start)(struct wiphy *wiphy,
				    struct wireless_dev *wdev,
				    enum nl80211_crit_proto_id protocol,
				    u16 duration);
	void	(*crit_proto_stop)(struct wiphy *wiphy,
				   struct wireless_dev *wdev);
	int	(*set_coalesce)(struct wiphy *wiphy,
				struct cfg80211_coalesce *coalesce);

	int	(*channel_switch)(struct wiphy *wiphy,
				  struct net_device *dev,
				  struct cfg80211_csa_settings *params);

	int     (*set_qos_map)(struct wiphy *wiphy,
			       struct net_device *dev,
			       struct cfg80211_qos_map *qos_map);

	int	(*set_ap_chanwidth)(struct wiphy *wiphy, struct net_device *dev,
				    unsigned int link_id,
				    struct cfg80211_chan_def *chandef);

	int	(*add_tx_ts)(struct wiphy *wiphy, struct net_device *dev,
			     u8 tsid, const u8 *peer, u8 user_prio,
			     u16 admitted_time);
	int	(*del_tx_ts)(struct wiphy *wiphy, struct net_device *dev,
			     u8 tsid, const u8 *peer);

	int	(*tdls_channel_switch)(struct wiphy *wiphy,
				       struct net_device *dev,
				       const u8 *addr, u8 oper_class,
				       struct cfg80211_chan_def *chandef);
	void	(*tdls_cancel_channel_switch)(struct wiphy *wiphy,
					      struct net_device *dev,
					      const u8 *addr);
	int	(*start_nan)(struct wiphy *wiphy, struct wireless_dev *wdev,
			     struct cfg80211_nan_conf *conf);
	void	(*stop_nan)(struct wiphy *wiphy, struct wireless_dev *wdev);
	int	(*add_nan_func)(struct wiphy *wiphy, struct wireless_dev *wdev,
				struct cfg80211_nan_func *nan_func);
	void	(*del_nan_func)(struct wiphy *wiphy, struct wireless_dev *wdev,
			       u64 cookie);
	int	(*nan_change_conf)(struct wiphy *wiphy,
				   struct wireless_dev *wdev,
				   struct cfg80211_nan_conf *conf,
				   u32 changes);

	int	(*set_multicast_to_unicast)(struct wiphy *wiphy,
					    struct net_device *dev,
					    const bool enabled);

	int	(*get_txq_stats)(struct wiphy *wiphy,
				 struct wireless_dev *wdev,
				 struct cfg80211_txq_stats *txqstats);

	int	(*set_pmk)(struct wiphy *wiphy, struct net_device *dev,
			   const struct cfg80211_pmk_conf *conf);
	int	(*del_pmk)(struct wiphy *wiphy, struct net_device *dev,
			   const u8 *aa);
	int     (*external_auth)(struct wiphy *wiphy, struct net_device *dev,
				 struct cfg80211_external_auth_params *params);

	int	(*tx_control_port)(struct wiphy *wiphy,
				   struct net_device *dev,
				   const u8 *buf, size_t len,
				   const u8 *dest, const __be16 proto,
				   const bool noencrypt, int link_id,
				   u64 *cookie);

	int	(*get_ftm_responder_stats)(struct wiphy *wiphy,
				struct net_device *dev,
				struct cfg80211_ftm_responder_stats *ftm_stats);

	int	(*start_pmsr)(struct wiphy *wiphy, struct wireless_dev *wdev,
			      struct cfg80211_pmsr_request *request);
	void	(*abort_pmsr)(struct wiphy *wiphy, struct wireless_dev *wdev,
			      struct cfg80211_pmsr_request *request);
	int	(*update_owe_info)(struct wiphy *wiphy, struct net_device *dev,
				   struct cfg80211_update_owe_info *owe_info);
	int	(*probe_mesh_link)(struct wiphy *wiphy, struct net_device *dev,
				   const u8 *buf, size_t len);
	int     (*set_tid_config)(struct wiphy *wiphy, struct net_device *dev,
				  struct cfg80211_tid_config *tid_conf);
	int	(*reset_tid_config)(struct wiphy *wiphy, struct net_device *dev,
				    const u8 *peer, u8 tids);
	int	(*set_sar_specs)(struct wiphy *wiphy,
				 struct cfg80211_sar_specs *sar);
	int	(*color_change)(struct wiphy *wiphy,
				struct net_device *dev,
				struct cfg80211_color_change_settings *params);
	int     (*set_fils_aad)(struct wiphy *wiphy, struct net_device *dev,
				struct cfg80211_fils_aad *fils_aad);
	int	(*set_radar_background)(struct wiphy *wiphy,
					struct cfg80211_chan_def *chandef);
	int	(*add_link_station)(struct wiphy *wiphy, struct net_device *dev,
				    struct link_station_parameters *params);
	int	(*mod_link_station)(struct wiphy *wiphy, struct net_device *dev,
				    struct link_station_parameters *params);
	int	(*del_link_station)(struct wiphy *wiphy, struct net_device *dev,
				    struct link_station_del_parameters *params);
	int	(*set_hw_timestamp)(struct wiphy *wiphy, struct net_device *dev,
				    struct cfg80211_set_hw_timestamp *hwts);
	int	(*set_ttlm)(struct wiphy *wiphy, struct net_device *dev,
			    struct cfg80211_ttlm_params *params);
	u32	(*get_radio_mask)(struct wiphy *wiphy, struct net_device *dev);
	int     (*assoc_ml_reconf)(struct wiphy *wiphy, struct net_device *dev,
				   struct cfg80211_ml_reconf_req *req);
	int	(*set_epcs)(struct wiphy *wiphy, struct net_device *dev,
			    bool val);
};

/*
 * wireless hardware and networking interfaces structures
 * and registration/helper functions
 */

/**
 * enum wiphy_flags - wiphy capability flags
 *
 * @WIPHY_FLAG_SPLIT_SCAN_6GHZ: if set to true, the scan request will be split
 *	 into two, first for legacy bands and second for 6 GHz.
 * @WIPHY_FLAG_NETNS_OK: if not set, do not allow changing the netns of this
 *	wiphy at all
 * @WIPHY_FLAG_PS_ON_BY_DEFAULT: if set to true, powersave will be enabled
 *	by default -- this flag will be set depending on the kernel's default
 *	on wiphy_new(), but can be changed by the driver if it has a good
 *	reason to override the default
 * @WIPHY_FLAG_4ADDR_AP: supports 4addr mode even on AP (with a single station
 *	on a VLAN interface). This flag also serves an extra purpose of
 *	supporting 4ADDR AP mode on devices which do not support AP/VLAN iftype.
 * @WIPHY_FLAG_4ADDR_STATION: supports 4addr mode even as a station
 * @WIPHY_FLAG_CONTROL_PORT_PROTOCOL: This device supports setting the
 *	control port protocol ethertype. The device also honours the
 *	control_port_no_encrypt flag.
 * @WIPHY_FLAG_IBSS_RSN: The device supports IBSS RSN.
 * @WIPHY_FLAG_MESH_AUTH: The device supports mesh authentication by routing
 *	auth frames to userspace. See @NL80211_MESH_SETUP_USERSPACE_AUTH.
 * @WIPHY_FLAG_SUPPORTS_FW_ROAM: The device supports roaming feature in the
 *	firmware.
 * @WIPHY_FLAG_AP_UAPSD: The device supports uapsd on AP.
 * @WIPHY_FLAG_SUPPORTS_TDLS: The device supports TDLS (802.11z) operation.
 * @WIPHY_FLAG_TDLS_EXTERNAL_SETUP: The device does not handle TDLS (802.11z)
 *	link setup/discovery operations internally. Setup, discovery and
 *	teardown packets should be sent through the @NL80211_CMD_TDLS_MGMT
 *	command. When this flag is not set, @NL80211_CMD_TDLS_OPER should be
 *	used for asking the driver/firmware to perform a TDLS operation.
 * @WIPHY_FLAG_HAVE_AP_SME: device integrates AP SME
 * @WIPHY_FLAG_REPORTS_OBSS: the device will report beacons from other BSSes
 *	when there are virtual interfaces in AP mode by calling
 *	cfg80211_report_obss_beacon().
 * @WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD: When operating as an AP, the device
 *	responds to probe-requests in hardware.
 * @WIPHY_FLAG_OFFCHAN_TX: Device supports direct off-channel TX.
 * @WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL: Device supports remain-on-channel call.
 * @WIPHY_FLAG_SUPPORTS_5_10_MHZ: Device supports 5 MHz and 10 MHz channels.
 * @WIPHY_FLAG_HAS_CHANNEL_SWITCH: Device supports channel switch in
 *	beaconing mode (AP, IBSS, Mesh, ...).
 * @WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK: The device supports bigger kek and kck keys
 * @WIPHY_FLAG_SUPPORTS_MLO: This is a temporary flag gating the MLO APIs,
 *	in order to not have them reachable in normal drivers, until we have
 *	complete feature/interface combinations/etc. advertisement. No driver
 *	should set this flag for now.
 * @WIPHY_FLAG_SUPPORTS_EXT_KCK_32: The device supports 32-byte KCK keys.
 * @WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER: The device could handle reg notify for
 *	NL80211_REGDOM_SET_BY_DRIVER.
 * @WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON: reg_call_notifier() is called if driver
 *	set this flag to update channels on beacon hints.
 * @WIPHY_FLAG_SUPPORTS_NSTR_NONPRIMARY: support connection to non-primary link
 *	of an NSTR mobile AP MLD.
 * @WIPHY_FLAG_DISABLE_WEXT: disable wireless extensions for this device
 */
enum wiphy_flags {
	WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK		= BIT(0),
	WIPHY_FLAG_SUPPORTS_MLO			= BIT(1),
	WIPHY_FLAG_SPLIT_SCAN_6GHZ		= BIT(2),
	WIPHY_FLAG_NETNS_OK			= BIT(3),
	WIPHY_FLAG_PS_ON_BY_DEFAULT		= BIT(4),
	WIPHY_FLAG_4ADDR_AP			= BIT(5),
	WIPHY_FLAG_4ADDR_STATION		= BIT(6),
	WIPHY_FLAG_CONTROL_PORT_PROTOCOL	= BIT(7),
	WIPHY_FLAG_IBSS_RSN			= BIT(8),
	WIPHY_FLAG_DISABLE_WEXT			= BIT(9),
	WIPHY_FLAG_MESH_AUTH			= BIT(10),
	WIPHY_FLAG_SUPPORTS_EXT_KCK_32          = BIT(11),
	WIPHY_FLAG_SUPPORTS_NSTR_NONPRIMARY	= BIT(12),
	WIPHY_FLAG_SUPPORTS_FW_ROAM		= BIT(13),
	WIPHY_FLAG_AP_UAPSD			= BIT(14),
	WIPHY_FLAG_SUPPORTS_TDLS		= BIT(15),
	WIPHY_FLAG_TDLS_EXTERNAL_SETUP		= BIT(16),
	WIPHY_FLAG_HAVE_AP_SME			= BIT(17),
	WIPHY_FLAG_REPORTS_OBSS			= BIT(18),
	WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD	= BIT(19),
	WIPHY_FLAG_OFFCHAN_TX			= BIT(20),
	WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL	= BIT(21),
	WIPHY_FLAG_SUPPORTS_5_10_MHZ		= BIT(22),
	WIPHY_FLAG_HAS_CHANNEL_SWITCH		= BIT(23),
	WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER	= BIT(24),
	WIPHY_FLAG_CHANNEL_CHANGE_ON_BEACON     = BIT(25),
};

/**
 * struct ieee80211_iface_limit - limit on certain interface types
 * @max: maximum number of interfaces of these types
 * @types: interface types (bits)
 */
struct ieee80211_iface_limit {
	u16 max;
	u16 types;
};

/**
 * struct ieee80211_iface_combination - possible interface combination
 *
 * With this structure the driver can describe which interface
 * combinations it supports concurrently. When set in a struct wiphy_radio,
 * the combinations refer to combinations of interfaces currently active on
 * that radio.
 *
 * Examples:
 *
 * 1. Allow #STA <= 1, #AP <= 1, matching BI, channels = 1, 2 total:
 *
 *    .. code-block:: c
 *
 *	struct ieee80211_iface_limit limits1[] = {
 *		{ .max = 1, .types = BIT(NL80211_IFTYPE_STATION), },
 *		{ .max = 1, .types = BIT(NL80211_IFTYPE_AP), },
 *	};
 *	struct ieee80211_iface_combination combination1 = {
 *		.limits = limits1,
 *		.n_limits = ARRAY_SIZE(limits1),
 *		.max_interfaces = 2,
 *		.beacon_int_infra_match = true,
 *	};
 *
 *
 * 2. Allow #{AP, P2P-GO} <= 8, channels = 1, 8 total:
 *
 *    .. code-block:: c
 *
 *	struct ieee80211_iface_limit limits2[] = {
 *		{ .max = 8, .types = BIT(NL80211_IFTYPE_AP) |
 *				     BIT(NL80211_IFTYPE_P2P_GO), },
 *	};
 *	struct ieee80211_iface_combination combination2 = {
 *		.limits = limits2,
 *		.n_limits = ARRAY_SIZE(limits2),
 *		.max_interfaces = 8,
 *		.num_different_channels = 1,
 *	};
 *
 *
 * 3. Allow #STA <= 1, #{P2P-client,P2P-GO} <= 3 on two channels, 4 total.
 *
 *    This allows for an infrastructure connection and three P2P connections.
 *
 *    .. code-block:: c
 *
 *	struct ieee80211_iface_limit limits3[] = {
 *		{ .max = 1, .types = BIT(NL80211_IFTYPE_STATION), },
 *		{ .max = 3, .types = BIT(NL80211_IFTYPE_P2P_GO) |
 *				     BIT(NL80211_IFTYPE_P2P_CLIENT), },
 *	};
 *	struct ieee80211_iface_combination combination3 = {
 *		.limits = limits3,
 *		.n_limits = ARRAY_SIZE(limits3),
 *		.max_interfaces = 4,
 *		.num_different_channels = 2,
 *	};
 *
 */
struct ieee80211_iface_combination {
	/**
	 * @limits:
	 * limits for the given interface types
	 */
	const struct ieee80211_iface_limit *limits;

	/**
	 * @num_different_channels:
	 * can use up to this many different channels
	 */
	u32 num_different_channels;

	/**
	 * @max_interfaces:
	 * maximum number of interfaces in total allowed in this group
	 */
	u16 max_interfaces;

	/**
	 * @n_limits:
	 * number of limitations
	 */
	u8 n_limits;

	/**
	 * @beacon_int_infra_match:
	 * In this combination, the beacon intervals between infrastructure
	 * and AP types must match. This is required only in special cases.
	 */
	bool beacon_int_infra_match;

	/**
	 * @radar_detect_widths:
	 * bitmap of channel widths supported for radar detection
	 */
	u8 radar_detect_widths;

	/**
	 * @radar_detect_regions:
	 * bitmap of regions supported for radar detection
	 */
	u8 radar_detect_regions;

	/**
	 * @beacon_int_min_gcd:
	 * This interface combination supports different beacon intervals.
	 *
	 * = 0
	 *   all beacon intervals for different interface must be same.
	 * > 0
	 *   any beacon interval for the interface part of this combination AND
	 *   GCD of all beacon intervals from beaconing interfaces of this
	 *   combination must be greater or equal to this value.
	 */
	u32 beacon_int_min_gcd;
};

struct ieee80211_txrx_stypes {
	u16 tx, rx;
};

/**
 * enum wiphy_wowlan_support_flags - WoWLAN support flags
 * @WIPHY_WOWLAN_ANY: supports wakeup for the special "any"
 *	trigger that keeps the device operating as-is and
 *	wakes up the host on any activity, for example a
 *	received packet that passed filtering; note that the
 *	packet should be preserved in that case
 * @WIPHY_WOWLAN_MAGIC_PKT: supports wakeup on magic packet
 *	(see nl80211.h)
 * @WIPHY_WOWLAN_DISCONNECT: supports wakeup on disconnect
 * @WIPHY_WOWLAN_SUPPORTS_GTK_REKEY: supports GTK rekeying while asleep
 * @WIPHY_WOWLAN_GTK_REKEY_FAILURE: supports wakeup on GTK rekey failure
 * @WIPHY_WOWLAN_EAP_IDENTITY_REQ: supports wakeup on EAP identity request
 * @WIPHY_WOWLAN_4WAY_HANDSHAKE: supports wakeup on 4-way handshake failure
 * @WIPHY_WOWLAN_RFKILL_RELEASE: supports wakeup on RF-kill release
 * @WIPHY_WOWLAN_NET_DETECT: supports wakeup on network detection
 */
enum wiphy_wowlan_support_flags {
	WIPHY_WOWLAN_ANY		= BIT(0),
	WIPHY_WOWLAN_MAGIC_PKT		= BIT(1),
	WIPHY_WOWLAN_DISCONNECT		= BIT(2),
	WIPHY_WOWLAN_SUPPORTS_GTK_REKEY	= BIT(3),
	WIPHY_WOWLAN_GTK_REKEY_FAILURE	= BIT(4),
	WIPHY_WOWLAN_EAP_IDENTITY_REQ	= BIT(5),
	WIPHY_WOWLAN_4WAY_HANDSHAKE	= BIT(6),
	WIPHY_WOWLAN_RFKILL_RELEASE	= BIT(7),
	WIPHY_WOWLAN_NET_DETECT		= BIT(8),
};

struct wiphy_wowlan_tcp_support {
	const struct nl80211_wowlan_tcp_data_token_feature *tok;
	u32 data_payload_max;
	u32 data_interval_max;
	u32 wake_payload_max;
	bool seq;
};

/**
 * struct wiphy_wowlan_support - WoWLAN support data
 * @flags: see &enum wiphy_wowlan_support_flags
 * @n_patterns: number of supported wakeup patterns
 *	(see nl80211.h for the pattern definition)
 * @pattern_max_len: maximum length of each pattern
 * @pattern_min_len: minimum length of each pattern
 * @max_pkt_offset: maximum Rx packet offset
 * @max_nd_match_sets: maximum number of matchsets for net-detect,
 *	similar, but not necessarily identical, to max_match_sets for
 *	scheduled scans.
 *	See &struct cfg80211_sched_scan_request.@match_sets for more
 *	details.
 * @tcp: TCP wakeup support information
 */
struct wiphy_wowlan_support {
	u32 flags;
	int n_patterns;
	int pattern_max_len;
	int pattern_min_len;
	int max_pkt_offset;
	int max_nd_match_sets;
	const struct wiphy_wowlan_tcp_support *tcp;
};

/**
 * struct wiphy_coalesce_support - coalesce support data
 * @n_rules: maximum number of coalesce rules
 * @max_delay: maximum supported coalescing delay in msecs
 * @n_patterns: number of supported patterns in a rule
 *	(see nl80211.h for the pattern definition)
 * @pattern_max_len: maximum length of each pattern
 * @pattern_min_len: minimum length of each pattern
 * @max_pkt_offset: maximum Rx packet offset
 */
struct wiphy_coalesce_support {
	int n_rules;
	int max_delay;
	int n_patterns;
	int pattern_max_len;
	int pattern_min_len;
	int max_pkt_offset;
};

/**
 * enum wiphy_vendor_command_flags - validation flags for vendor commands
 * @WIPHY_VENDOR_CMD_NEED_WDEV: vendor command requires wdev
 * @WIPHY_VENDOR_CMD_NEED_NETDEV: vendor command requires netdev
 * @WIPHY_VENDOR_CMD_NEED_RUNNING: interface/wdev must be up & running
 *	(must be combined with %_WDEV or %_NETDEV)
 */
enum wiphy_vendor_command_flags {
	WIPHY_VENDOR_CMD_NEED_WDEV = BIT(0),
	WIPHY_VENDOR_CMD_NEED_NETDEV = BIT(1),
	WIPHY_VENDOR_CMD_NEED_RUNNING = BIT(2),
};

/**
 * enum wiphy_opmode_flag - Station's ht/vht operation mode information flags
 *
 * @STA_OPMODE_MAX_BW_CHANGED: Max Bandwidth changed
 * @STA_OPMODE_SMPS_MODE_CHANGED: SMPS mode changed
 * @STA_OPMODE_N_SS_CHANGED: max N_SS (number of spatial streams) changed
 *
 */
enum wiphy_opmode_flag {
	STA_OPMODE_MAX_BW_CHANGED	= BIT(0),
	STA_OPMODE_SMPS_MODE_CHANGED	= BIT(1),
	STA_OPMODE_N_SS_CHANGED		= BIT(2),
};

/**
 * struct sta_opmode_info - Station's ht/vht operation mode information
 * @changed: contains value from &enum wiphy_opmode_flag
 * @smps_mode: New SMPS mode value from &enum nl80211_smps_mode of a station
 * @bw: new max bandwidth value from &enum nl80211_chan_width of a station
 * @rx_nss: new rx_nss value of a station
 */

struct sta_opmode_info {
	u32 changed;
	enum nl80211_smps_mode smps_mode;
	enum nl80211_chan_width bw;
	u8 rx_nss;
};

#define VENDOR_CMD_RAW_DATA ((const struct nla_policy *)(long)(-ENODATA))

/**
 * struct wiphy_vendor_command - vendor command definition
 * @info: vendor command identifying information, as used in nl80211
 * @flags: flags, see &enum wiphy_vendor_command_flags
 * @doit: callback for the operation, note that wdev is %NULL if the
 *	flags didn't ask for a wdev and non-%NULL otherwise; the data
 *	pointer may be %NULL if userspace provided no data at all
 * @dumpit: dump callback, for transferring bigger/multiple items. The
 *	@storage points to cb->args[5], ie. is preserved over the multiple
 *	dumpit calls.
 * @policy: policy pointer for attributes within %NL80211_ATTR_VENDOR_DATA.
 *	Set this to %VENDOR_CMD_RAW_DATA if no policy can be given and the
 *	attribute is just raw data (e.g. a firmware command).
 * @maxattr: highest attribute number in policy
 * It's recommended to not have the same sub command with both @doit and
 * @dumpit, so that userspace can assume certain ones are get and others
 * are used with dump requests.
 */
struct wiphy_vendor_command {
	struct nl80211_vendor_cmd_info info;
	u32 flags;
	int (*doit)(struct wiphy *wiphy, struct wireless_dev *wdev,
		    const void *data, int data_len);
	int (*dumpit)(struct wiphy *wiphy, struct wireless_dev *wdev,
		      struct sk_buff *skb, const void *data, int data_len,
		      unsigned long *storage);
	const struct nla_policy *policy;
	unsigned int maxattr;
};

/**
 * struct wiphy_iftype_ext_capab - extended capabilities per interface type
 * @iftype: interface type
 * @extended_capabilities: extended capabilities supported by the driver,
 *	additional capabilities might be supported by userspace; these are the
 *	802.11 extended capabilities ("Extended Capabilities element") and are
 *	in the same format as in the information element. See IEEE Std
 *	802.11-2012 8.4.2.29 for the defined fields.
 * @extended_capabilities_mask: mask of the valid values
 * @extended_capabilities_len: length of the extended capabilities
 * @eml_capabilities: EML capabilities (for MLO)
 * @mld_capa_and_ops: MLD capabilities and operations (for MLO)
 */
struct wiphy_iftype_ext_capab {
	enum nl80211_iftype iftype;
	const u8 *extended_capabilities;
	const u8 *extended_capabilities_mask;
	u8 extended_capabilities_len;
	u16 eml_capabilities;
	u16 mld_capa_and_ops;
};

/**
 * cfg80211_get_iftype_ext_capa - lookup interface type extended capability
 * @wiphy: the wiphy to look up from
 * @type: the interface type to look up
 *
 * Return: The extended capability for the given interface @type, may be %NULL
 */
const struct wiphy_iftype_ext_capab *
cfg80211_get_iftype_ext_capa(struct wiphy *wiphy, enum nl80211_iftype type);

/**
 * struct cfg80211_pmsr_capabilities - cfg80211 peer measurement capabilities
 * @max_peers: maximum number of peers in a single measurement
 * @report_ap_tsf: can report assoc AP's TSF for radio resource measurement
 * @randomize_mac_addr: can randomize MAC address for measurement
 * @ftm: FTM measurement data
 * @ftm.supported: FTM measurement is supported
 * @ftm.asap: ASAP-mode is supported
 * @ftm.non_asap: non-ASAP-mode is supported
 * @ftm.request_lci: can request LCI data
 * @ftm.request_civicloc: can request civic location data
 * @ftm.preambles: bitmap of preambles supported (&enum nl80211_preamble)
 * @ftm.bandwidths: bitmap of bandwidths supported (&enum nl80211_chan_width)
 * @ftm.max_bursts_exponent: maximum burst exponent supported
 *	(set to -1 if not limited; note that setting this will necessarily
 *	forbid using the value 15 to let the responder pick)
 * @ftm.max_ftms_per_burst: maximum FTMs per burst supported (set to 0 if
 *	not limited)
 * @ftm.trigger_based: trigger based ranging measurement is supported
 * @ftm.non_trigger_based: non trigger based ranging measurement is supported
 * @ftm.support_6ghz: supports ranging in 6 GHz band
 * @ftm.max_tx_ltf_rep: maximum number of TX LTF repetitions supported (0 means
 *	only one LTF, no repetitions)
 * @ftm.max_rx_ltf_rep: maximum number of RX LTF repetitions supported (0 means
 *	only one LTF, no repetitions)
 * @ftm.max_tx_sts: maximum number of TX STS supported (zero based)
 * @ftm.max_rx_sts: maximum number of RX STS supported (zero based)
 * @ftm.max_total_ltf_tx: maximum total number of LTFs that can be transmitted
 *	(0 means unknown)
 * @ftm.max_total_ltf_rx: maximum total number of LTFs that can be received
 *	(0 means unknown)
 * @ftm.support_rsta: supports operating as RSTA in PMSR FTM request
 */
struct cfg80211_pmsr_capabilities {
	unsigned int max_peers;
	u8 report_ap_tsf:1,
	   randomize_mac_addr:1;

	struct {
		u32 preambles;
		u32 bandwidths;
		s8 max_bursts_exponent;
		u8 max_ftms_per_burst;
		u8 supported:1,
		   asap:1,
		   non_asap:1,
		   request_lci:1,
		   request_civicloc:1,
		   trigger_based:1,
		   non_trigger_based:1,
		   support_6ghz:1;
		u8 max_tx_ltf_rep;
		u8 max_rx_ltf_rep;
		u8 max_tx_sts;
		u8 max_rx_sts;
		u8 max_total_ltf_tx;
		u8 max_total_ltf_rx;
		u8 support_rsta:1;
	} ftm;
};

/**
 * struct wiphy_iftype_akm_suites - This structure encapsulates supported akm
 * suites for interface types defined in @iftypes_mask. Each type in the
 * @iftypes_mask must be unique across all instances of iftype_akm_suites.
 *
 * @iftypes_mask: bitmask of interfaces types
 * @akm_suites: points to an array of supported akm suites
 * @n_akm_suites: number of supported AKM suites
 */
struct wiphy_iftype_akm_suites {
	u16 iftypes_mask;
	const u32 *akm_suites;
	int n_akm_suites;
};

/**
 * struct wiphy_radio_cfg - physical radio config of a wiphy
 * This structure describes the configurations of a physical radio in a
 * wiphy. It is used to denote per-radio attributes belonging to a wiphy.
 *
 * @rts_threshold: RTS threshold (dot11RTSThreshold);
 *	-1 (default) = RTS/CTS disabled
 * @radio_debugfsdir: Pointer to debugfs directory containing the radio-
 *	specific parameters.
 *	NULL (default) = Debugfs directory not created
 */
struct wiphy_radio_cfg {
	u32 rts_threshold;
	struct dentry *radio_debugfsdir;
};

/**
 * struct wiphy_radio_freq_range - wiphy frequency range
 * @start_freq:  start range edge frequency (kHz)
 * @end_freq:    end range edge frequency (kHz)
 */
struct wiphy_radio_freq_range {
	u32 start_freq;
	u32 end_freq;
};


/**
 * struct wiphy_radio - physical radio of a wiphy
 * This structure describes a physical radio belonging to a wiphy.
 * It is used to describe concurrent-channel capabilities. Only one channel
 * can be active on the radio described by struct wiphy_radio.
 *
 * @freq_range: frequency range that the radio can operate on.
 * @n_freq_range: number of elements in @freq_range
 *
 * @iface_combinations: Valid interface combinations array, should not
 *	list single interface types.
 * @n_iface_combinations: number of entries in @iface_combinations array.
 *
 * @antenna_mask: bitmask of antennas connected to this radio.
 */
struct wiphy_radio {
	const struct wiphy_radio_freq_range *freq_range;
	int n_freq_range;

	const struct ieee80211_iface_combination *iface_combinations;
	int n_iface_combinations;

	u32 antenna_mask;
};

/**
 * enum wiphy_nan_flags - NAN capabilities
 *
 * @WIPHY_NAN_FLAGS_CONFIGURABLE_SYNC: Device supports NAN configurable
 *     synchronization.
 * @WIPHY_NAN_FLAGS_USERSPACE_DE: Device doesn't support DE offload.
 */
enum wiphy_nan_flags {
	WIPHY_NAN_FLAGS_CONFIGURABLE_SYNC = BIT(0),
	WIPHY_NAN_FLAGS_USERSPACE_DE   = BIT(1),
};

/**
 * struct wiphy_nan_capa - NAN capabilities
 *
 * This structure describes the NAN capabilities of a wiphy.
 *
 * @flags: NAN capabilities flags, see &enum wiphy_nan_flags
 * @op_mode: NAN operation mode, as defined in Wi-Fi Aware (TM) specification
 *     Table 81.
 * @n_antennas: number of antennas supported by the device for Tx/Rx. Lower
 *     nibble indicates the number of TX antennas and upper nibble indicates the
 *     number of RX antennas. Value 0 indicates the information is not
 *     available.
 * @max_channel_switch_time: maximum channel switch time in milliseconds.
 * @dev_capabilities: NAN device capabilities as defined in Wi-Fi Aware (TM)
 *     specification Table 79 (Capabilities field).
 */
struct wiphy_nan_capa {
	u32 flags;
	u8 op_mode;
	u8 n_antennas;
	u16 max_channel_switch_time;
	u8 dev_capabilities;
};

#define CFG80211_HW_TIMESTAMP_ALL_PEERS	0xffff

/**
 * struct wiphy - wireless hardware description
 * @mtx: mutex for the data (structures) of this device
 * @reg_notifier: the driver's regulatory notification callback,
 *	note that if your driver uses wiphy_apply_custom_regulatory()
 *	the reg_notifier's request can be passed as NULL
 * @regd: the driver's regulatory domain, if one was requested via
 *	the regulatory_hint() API. This can be used by the driver
 *	on the reg_notifier() if it chooses to ignore future
 *	regulatory domain changes caused by other drivers.
 * @signal_type: signal type reported in &struct cfg80211_bss.
 * @cipher_suites: supported cipher suites
 * @n_cipher_suites: number of supported cipher suites
 * @akm_suites: supported AKM suites. These are the default AKMs supported if
 *	the supported AKMs not advertized for a specific interface type in
 *	iftype_akm_suites.
 * @n_akm_suites: number of supported AKM suites
 * @iftype_akm_suites: array of supported akm suites info per interface type.
 *	Note that the bits in @iftypes_mask inside this structure cannot
 *	overlap (i.e. only one occurrence of each type is allowed across all
 *	instances of iftype_akm_suites).
 * @num_iftype_akm_suites: number of interface types for which supported akm
 *	suites are specified separately.
 * @retry_short: Retry limit for short frames (dot11ShortRetryLimit)
 * @retry_long: Retry limit for long frames (dot11LongRetryLimit)
 * @frag_threshold: Fragmentation threshold (dot11FragmentationThreshold);
 *	-1 = fragmentation disabled, only odd values >= 256 used
 * @rts_threshold: RTS threshold (dot11RTSThreshold); -1 = RTS/CTS disabled
 * @_net: the network namespace this wiphy currently lives in
 * @perm_addr: permanent MAC address of this device
 * @addr_mask: If the device supports multiple MAC addresses by masking,
 *	set this to a mask with variable bits set to 1, e.g. if the last
 *	four bits are variable then set it to 00-00-00-00-00-0f. The actual
 *	variable bits shall be determined by the interfaces added, with
 *	interfaces not matching the mask being rejected to be brought up.
 * @n_addresses: number of addresses in @addresses.
 * @addresses: If the device has more than one address, set this pointer
 *	to a list of addresses (6 bytes each). The first one will be used
 *	by default for perm_addr. In this case, the mask should be set to
 *	all-zeroes. In this case it is assumed that the device can handle
 *	the same number of arbitrary MAC addresses.
 * @registered: protects ->resume and ->suspend sysfs callbacks against
 *	unregister hardware
 * @debugfsdir: debugfs directory used for this wiphy (ieee80211/<wiphyname>).
 *	It will be renamed automatically on wiphy renames
 * @dev: (virtual) struct device for this wiphy. The item in
 *	/sys/class/ieee80211/ points to this. You need use set_wiphy_dev()
 *	(see below).
 * @wext: wireless extension handlers
 * @priv: driver private data (sized according to wiphy_new() parameter)
 * @interface_modes: bitmask of interfaces types valid for this wiphy,
 *	must be set by driver
 * @iface_combinations: Valid interface combinations array, should not
 *	list single interface types.
 * @n_iface_combinations: number of entries in @iface_combinations array.
 * @software_iftypes: bitmask of software interface types, these are not
 *	subject to any restrictions since they are purely managed in SW.
 * @flags: wiphy flags, see &enum wiphy_flags
 * @regulatory_flags: wiphy regulatory flags, see
 *	&enum ieee80211_regulatory_flags
 * @features: features advertised to nl80211, see &enum nl80211_feature_flags.
 * @ext_features: extended features advertised to nl80211, see
 *	&enum nl80211_ext_feature_index.
 * @bss_priv_size: each BSS struct has private data allocated with it,
 *	this variable determines its size
 * @max_scan_ssids: maximum number of SSIDs the device can scan for in
 *	any given scan
 * @max_sched_scan_reqs: maximum number of scheduled scan requests that
 *	the device can run concurrently.
 * @max_sched_scan_ssids: maximum number of SSIDs the device can scan
 *	for in any given scheduled scan
 * @max_match_sets: maximum number of match sets the device can handle
 *	when performing a scheduled scan, 0 if filtering is not
 *	supported.
 * @max_scan_ie_len: maximum length of user-controlled IEs device can
 *	add to probe request frames transmitted during a scan, must not
 *	include fixed IEs like supported rates
 * @max_sched_scan_ie_len: same as max_scan_ie_len, but for scheduled
 *	scans
 * @max_sched_scan_plans: maximum number of scan plans (scan interval and number
 *	of iterations) for scheduled scan supported by the device.
 * @max_sched_scan_plan_interval: maximum interval (in seconds) for a
 *	single scan plan supported by the device.
 * @max_sched_scan_plan_iterations: maximum number of iterations for a single
 *	scan plan supported by the device.
 * @coverage_class: current coverage class
 * @fw_version: firmware version for ethtool reporting
 * @hw_version: hardware version for ethtool reporting
 * @max_num_pmkids: maximum number of PMKIDs supported by device
 * @privid: a pointer that drivers can use to identify if an arbitrary
 *	wiphy is theirs, e.g. in global notifiers
 * @bands: information about bands/channels supported by this device
 *
 * @mgmt_stypes: bitmasks of frame subtypes that can be subscribed to or
 *	transmitted through nl80211, points to an array indexed by interface
 *	type
 *
 * @available_antennas_tx: bitmap of antennas which are available to be
 *	configured as TX antennas. Antenna configuration commands will be
 *	rejected unless this or @available_antennas_rx is set.
 *
 * @available_antennas_rx: bitmap of antennas which are available to be
 *	configured as RX antennas. Antenna configuration commands will be
 *	rejected unless this or @available_antennas_tx is set.
 *
 * @probe_resp_offload:
 *	 Bitmap of supported protocols for probe response offloading.
 *	 See &enum nl80211_probe_resp_offload_support_attr. Only valid
 *	 when the wiphy flag @WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD is set.
 *
 * @max_remain_on_channel_duration: Maximum time a remain-on-channel operation
 *	may request, if implemented.
 *
 * @wowlan: WoWLAN support information
 * @wowlan_config: current WoWLAN configuration; this should usually not be
 *	used since access to it is necessarily racy, use the parameter passed
 *	to the suspend() operation instead.
 *
 * @ap_sme_capa: AP SME capabilities, flags from &enum nl80211_ap_sme_features.
 * @ht_capa_mod_mask:  Specify what ht_cap values can be over-ridden.
 *	If null, then none can be over-ridden.
 * @vht_capa_mod_mask:  Specify what VHT capabilities can be over-ridden.
 *	If null, then none can be over-ridden.
 *
 * @wdev_list: the list of associated (virtual) interfaces; this list must
 *	not be modified by the driver, but can be read with RTNL/RCU protection.
 *
 * @max_acl_mac_addrs: Maximum number of MAC addresses that the device
 *	supports for ACL.
 *
 * @extended_capabilities: extended capabilities supported by the driver,
 *	additional capabilities might be supported by userspace; these are
 *	the 802.11 extended capabilities ("Extended Capabilities element")
 *	and are in the same format as in the information element. See
 *	802.11-2012 8.4.2.29 for the defined fields. These are the default
 *	extended capabilities to be used if the capabilities are not specified
 *	for a specific interface type in iftype_ext_capab.
 * @extended_capabilities_mask: mask of the valid values
 * @extended_capabilities_len: length of the extended capabilities
 * @iftype_ext_capab: array of extended capabilities per interface type
 * @num_iftype_ext_capab: number of interface types for which extended
 *	capabilities are specified separately.
 * @coalesce: packet coalescing support information
 *
 * @vendor_commands: array of vendor commands supported by the hardware
 * @n_vendor_commands: number of vendor commands
 * @vendor_events: array of vendor events supported by the hardware
 * @n_vendor_events: number of vendor events
 *
 * @max_ap_assoc_sta: maximum number of associated stations supported in AP mode
 *	(including P2P GO) or 0 to indicate no such limit is advertised. The
 *	driver is allowed to advertise a theoretical limit that it can reach in
 *	some cases, but may not always reach.
 *
 * @max_num_csa_counters: Number of supported csa_counters in beacons
 *	and probe responses.  This value should be set if the driver
 *	wishes to limit the number of csa counters. Default (0) means
 *	infinite.
 * @bss_param_support: bitmask indicating which bss_parameters as defined in
 *	&struct bss_parameters the driver can actually handle in the
 *	.change_bss() callback. The bit positions are defined in &enum
 *	wiphy_bss_param_flags.
 *
 * @bss_select_support: bitmask indicating the BSS selection criteria supported
 *	by the driver in the .connect() callback. The bit position maps to the
 *	attribute indices defined in &enum nl80211_bss_select_attr.
 *
 * @nan_supported_bands: bands supported by the device in NAN mode, a
 *	bitmap of &enum nl80211_band values.  For instance, for
 *	NL80211_BAND_2GHZ, bit 0 would be set
 *	(i.e. BIT(NL80211_BAND_2GHZ)).
 * @nan_capa: NAN capabilities
 *
 * @txq_limit: configuration of internal TX queue frame limit
 * @txq_memory_limit: configuration internal TX queue memory limit
 * @txq_quantum: configuration of internal TX queue scheduler quantum
 *
 * @tx_queue_len: allow setting transmit queue len for drivers not using
 *	wake_tx_queue
 *
 * @support_mbssid: can HW support association with nontransmitted AP
 * @support_only_he_mbssid: don't parse MBSSID elements if it is not
 *	HE AP, in order to avoid compatibility issues.
 *	@support_mbssid must be set for this to have any effect.
 *
 * @pmsr_capa: peer measurement capabilities
 *
 * @tid_config_support: describes the per-TID config support that the
 *	device has
 * @tid_config_support.vif: bitmap of attributes (configurations)
 *	supported by the driver for each vif
 * @tid_config_support.peer: bitmap of attributes (configurations)
 *	supported by the driver for each peer
 * @tid_config_support.max_retry: maximum supported retry count for
 *	long/short retry configuration
 *
 * @max_data_retry_count: maximum supported per TID retry count for
 *	configuration through the %NL80211_TID_CONFIG_ATTR_RETRY_SHORT and
 *	%NL80211_TID_CONFIG_ATTR_RETRY_LONG attributes
 * @sar_capa: SAR control capabilities
 * @rfkill: a pointer to the rfkill structure
 *
 * @mbssid_max_interfaces: maximum number of interfaces supported by the driver
 *	in a multiple BSSID set. This field must be set to a non-zero value
 *	by the driver to advertise MBSSID support.
 * @ema_max_profile_periodicity: maximum profile periodicity supported by
 *	the driver. Setting this field to a non-zero value indicates that the
 *	driver supports enhanced multi-BSSID advertisements (EMA AP).
 * @max_num_akm_suites: maximum number of AKM suites allowed for
 *	configuration through %NL80211_CMD_CONNECT, %NL80211_CMD_ASSOCIATE and
 *	%NL80211_CMD_START_AP. Set to NL80211_MAX_NR_AKM_SUITES if not set by
 *	driver. If set by driver minimum allowed value is
 *	NL80211_MAX_NR_AKM_SUITES in order to avoid compatibility issues with
 *	legacy userspace and maximum allowed value is
 *	CFG80211_MAX_NUM_AKM_SUITES.
 *
 * @hw_timestamp_max_peers: maximum number of peers that the driver supports
 *	enabling HW timestamping for concurrently. Setting this field to a
 *	non-zero value indicates that the driver supports HW timestamping.
 *	A value of %CFG80211_HW_TIMESTAMP_ALL_PEERS indicates the driver
 *	supports enabling HW timestamping for all peers (i.e. no need to
 *	specify a mac address).
 *
 * @radio_cfg: configuration of radios belonging to a muli-radio wiphy. This
 *	struct contains a list of all radio specific attributes and should be
 *	used only for multi-radio wiphy.
 *
 * @radio: radios belonging to this wiphy
 * @n_radio: number of radios
 */
struct wiphy {
	struct mutex mtx;

	/* assign these fields before you register the wiphy */

	u8 perm_addr[ETH_ALEN];
	u8 addr_mask[ETH_ALEN];

	struct mac_address *addresses;

	const struct ieee80211_txrx_stypes *mgmt_stypes;

	const struct ieee80211_iface_combination *iface_combinations;
	int n_iface_combinations;
	u16 software_iftypes;

	u16 n_addresses;

	/* Supported interface modes, OR together BIT(NL80211_IFTYPE_...) */
	u16 interface_modes;

	u16 max_acl_mac_addrs;

	u32 flags, regulatory_flags, features;
	u8 ext_features[DIV_ROUND_UP(NUM_NL80211_EXT_FEATURES, 8)];

	u32 ap_sme_capa;

	enum cfg80211_signal_type signal_type;

	int bss_priv_size;
	u8 max_scan_ssids;
	u8 max_sched_scan_reqs;
	u8 max_sched_scan_ssids;
	u8 max_match_sets;
	u16 max_scan_ie_len;
	u16 max_sched_scan_ie_len;
	u32 max_sched_scan_plans;
	u32 max_sched_scan_plan_interval;
	u32 max_sched_scan_plan_iterations;

	int n_cipher_suites;
	const u32 *cipher_suites;

	int n_akm_suites;
	const u32 *akm_suites;

	const struct wiphy_iftype_akm_suites *iftype_akm_suites;
	unsigned int num_iftype_akm_suites;

	u8 retry_short;
	u8 retry_long;
	u32 frag_threshold;
	u32 rts_threshold;
	u8 coverage_class;

	char fw_version[ETHTOOL_FWVERS_LEN];
	u32 hw_version;

#ifdef CONFIG_PM
	const struct wiphy_wowlan_support *wowlan;
	struct cfg80211_wowlan *wowlan_config;
#endif

	u16 max_remain_on_channel_duration;

	u8 max_num_pmkids;

	u32 available_antennas_tx;
	u32 available_antennas_rx;

	u32 probe_resp_offload;

	const u8 *extended_capabilities, *extended_capabilities_mask;
	u8 extended_capabilities_len;

	const struct wiphy_iftype_ext_capab *iftype_ext_capab;
	unsigned int num_iftype_ext_capab;

	const void *privid;

	struct ieee80211_supported_band *bands[NUM_NL80211_BANDS];

	void (*reg_notifier)(struct wiphy *wiphy,
			     struct regulatory_request *request);

	struct wiphy_radio_cfg *radio_cfg;

	/* fields below are read-only, assigned by cfg80211 */

	const struct ieee80211_regdomain __rcu *regd;

	struct device dev;

	bool registered;

	struct dentry *debugfsdir;

	const struct ieee80211_ht_cap *ht_capa_mod_mask;
	const struct ieee80211_vht_cap *vht_capa_mod_mask;

	struct list_head wdev_list;

	possible_net_t _net;

#ifdef CONFIG_CFG80211_WEXT
	const struct iw_handler_def *wext;
#endif

	const struct wiphy_coalesce_support *coalesce;

	const struct wiphy_vendor_command *vendor_commands;
	const struct nl80211_vendor_cmd_info *vendor_events;
	int n_vendor_commands, n_vendor_events;

	u16 max_ap_assoc_sta;

	u8 max_num_csa_counters;

	u32 bss_param_support;
	u32 bss_select_support;

	u8 nan_supported_bands;
	struct wiphy_nan_capa nan_capa;

	u32 txq_limit;
	u32 txq_memory_limit;
	u32 txq_quantum;

	unsigned long tx_queue_len;

	u8 support_mbssid:1,
	   support_only_he_mbssid:1;

	const struct cfg80211_pmsr_capabilities *pmsr_capa;

	struct {
		u64 peer, vif;
		u8 max_retry;
	} tid_config_support;

	u8 max_data_retry_count;

	const struct cfg80211_sar_capa *sar_capa;

	struct rfkill *rfkill;

	u8 mbssid_max_interfaces;
	u8 ema_max_profile_periodicity;
	u16 max_num_akm_suites;

	u16 hw_timestamp_max_peers;

	int n_radio;
	const struct wiphy_radio *radio;

	char priv[] __aligned(NETDEV_ALIGN);
};

static inline struct net *wiphy_net(struct wiphy *wiphy)
{
	return read_pnet(&wiphy->_net);
}

static inline void wiphy_net_set(struct wiphy *wiphy, struct net *net)
{
	write_pnet(&wiphy->_net, net);
}

/**
 * wiphy_priv - return priv from wiphy
 *
 * @wiphy: the wiphy whose priv pointer to return
 * Return: The priv of @wiphy.
 */
static inline void *wiphy_priv(struct wiphy *wiphy)
{
	BUG_ON(!wiphy);
	return &wiphy->priv;
}

/**
 * priv_to_wiphy - return the wiphy containing the priv
 *
 * @priv: a pointer previously returned by wiphy_priv
 * Return: The wiphy of @priv.
 */
static inline struct wiphy *priv_to_wiphy(void *priv)
{
	BUG_ON(!priv);
	return container_of(priv, struct wiphy, priv);
}

/**
 * set_wiphy_dev - set device pointer for wiphy
 *
 * @wiphy: The wiphy whose device to bind
 * @dev: The device to parent it to
 */
static inline void set_wiphy_dev(struct wiphy *wiphy, struct device *dev)
{
	wiphy->dev.parent = dev;
}

/**
 * wiphy_dev - get wiphy dev pointer
 *
 * @wiphy: The wiphy whose device struct to look up
 * Return: The dev of @wiphy.
 */
static inline struct device *wiphy_dev(struct wiphy *wiphy)
{
	return wiphy->dev.parent;
}

/**
 * wiphy_name - get wiphy name
 *
 * @wiphy: The wiphy whose name to return
 * Return: The name of @wiphy.
 */
static inline const char *wiphy_name(const struct wiphy *wiphy)
{
	return dev_name(&wiphy->dev);
}

/**
 * wiphy_new_nm - create a new wiphy for use with cfg80211
 *
 * @ops: The configuration operations for this device
 * @sizeof_priv: The size of the private area to allocate
 * @requested_name: Request a particular name.
 *	NULL is valid value, and means use the default phy%d naming.
 *
 * Create a new wiphy and associate the given operations with it.
 * @sizeof_priv bytes are allocated for private use.
 *
 * Return: A pointer to the new wiphy. This pointer must be
 * assigned to each netdev's ieee80211_ptr for proper operation.
 */
struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
			   const char *requested_name);

/**
 * wiphy_new - create a new wiphy for use with cfg80211
 *
 * @ops: The configuration operations for this device
 * @sizeof_priv: The size of the private area to allocate
 *
 * Create a new wiphy and associate the given operations with it.
 * @sizeof_priv bytes are allocated for private use.
 *
 * Return: A pointer to the new wiphy. This pointer must be
 * assigned to each netdev's ieee80211_ptr for proper operation.
 */
static inline struct wiphy *wiphy_new(const struct cfg80211_ops *ops,
				      int sizeof_priv)
{
	return wiphy_new_nm(ops, sizeof_priv, NULL);
}

/**
 * wiphy_register - register a wiphy with cfg80211
 *
 * @wiphy: The wiphy to register.
 *
 * Return: A non-negative wiphy index or a negative error code.
 */
int wiphy_register(struct wiphy *wiphy);

/* this is a define for better error reporting (file/line) */
#define lockdep_assert_wiphy(wiphy) lockdep_assert_held(&(wiphy)->mtx)

/**
 * rcu_dereference_wiphy - rcu_dereference with debug checking
 * @wiphy: the wiphy to check the locking on
 * @p: The pointer to read, prior to dereferencing
 *
 * Do an rcu_dereference(p), but check caller either holds rcu_read_lock()
 * or RTNL. Note: Please prefer wiphy_dereference() or rcu_dereference().
 */
#define rcu_dereference_wiphy(wiphy, p)				\
        rcu_dereference_check(p, lockdep_is_held(&wiphy->mtx))

/**
 * wiphy_dereference - fetch RCU pointer when updates are prevented by wiphy mtx
 * @wiphy: the wiphy to check the locking on
 * @p: The pointer to read, prior to dereferencing
 *
 * Return: the value of the specified RCU-protected pointer, but omit the
 * READ_ONCE(), because caller holds the wiphy mutex used for updates.
 */
#define wiphy_dereference(wiphy, p)				\
        rcu_dereference_protected(p, lockdep_is_held(&wiphy->mtx))

/**
 * get_wiphy_regdom - get custom regdomain for the given wiphy
 * @wiphy: the wiphy to get the regdomain from
 *
 * Context: Requires any of RTNL, wiphy mutex or RCU protection.
 *
 * Return: pointer to the regulatory domain associated with the wiphy
 */
const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy);

/**
 * wiphy_unregister - deregister a wiphy from cfg80211
 *
 * @wiphy: The wiphy to unregister.
 *
 * After this call, no more requests can be made with this priv
 * pointer, but the call may sleep to wait for an outstanding
 * request that is being handled.
 */
void wiphy_unregister(struct wiphy *wiphy);

/**
 * wiphy_free - free wiphy
 *
 * @wiphy: The wiphy to free
 */
void wiphy_free(struct wiphy *wiphy);

/* internal structs */
struct cfg80211_conn;
struct cfg80211_internal_bss;
struct cfg80211_cached_keys;
struct cfg80211_cqm_config;

/**
 * wiphy_lock - lock the wiphy
 * @wiphy: the wiphy to lock
 *
 * This is needed around registering and unregistering netdevs that
 * aren't created through cfg80211 calls, since that requires locking
 * in cfg80211 when the notifiers is called, but that cannot
 * differentiate which way it's called.
 *
 * It can also be used by drivers for their own purposes.
 *
 * When cfg80211 ops are called, the wiphy is already locked.
 *
 * Note that this makes sure that no workers that have been queued
 * with wiphy_queue_work() are running.
 */
static inline void wiphy_lock(struct wiphy *wiphy)
	__acquires(&wiphy->mtx)
{
	mutex_lock(&wiphy->mtx);
	__acquire(&wiphy->mtx);
}

/**
 * wiphy_unlock - unlock the wiphy again
 * @wiphy: the wiphy to unlock
 */
static inline void wiphy_unlock(struct wiphy *wiphy)
	__releases(&wiphy->mtx)
{
	__release(&wiphy->mtx);
	mutex_unlock(&wiphy->mtx);
}

DEFINE_GUARD(wiphy, struct wiphy *,
	     mutex_lock(&_T->mtx),
	     mutex_unlock(&_T->mtx))

struct wiphy_work;
typedef void (*wiphy_work_func_t)(struct wiphy *, struct wiphy_work *);

struct wiphy_work {
	struct list_head entry;
	wiphy_work_func_t func;
};

static inline void wiphy_work_init(struct wiphy_work *work,
				   wiphy_work_func_t func)
{
	INIT_LIST_HEAD(&work->entry);
	work->func = func;
}

/**
 * wiphy_work_queue - queue work for the wiphy
 * @wiphy: the wiphy to queue for
 * @work: the work item
 *
 * This is useful for work that must be done asynchronously, and work
 * queued here has the special property that the wiphy mutex will be
 * held as if wiphy_lock() was called, and that it cannot be running
 * after wiphy_lock() was called. Therefore, wiphy_cancel_work() can
 * use just cancel_work() instead of cancel_work_sync(), it requires
 * being in a section protected by wiphy_lock().
 */
void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work);

/**
 * wiphy_work_cancel - cancel previously queued work
 * @wiphy: the wiphy, for debug purposes
 * @work: the work to cancel
 *
 * Cancel the work *without* waiting for it, this assumes being
 * called under the wiphy mutex acquired by wiphy_lock().
 */
void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work);

/**
 * wiphy_work_flush - flush previously queued work
 * @wiphy: the wiphy, for debug purposes
 * @work: the work to flush, this can be %NULL to flush all work
 *
 * Flush the work (i.e. run it if pending). This must be called
 * under the wiphy mutex acquired by wiphy_lock().
 */
void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work);

struct wiphy_delayed_work {
	struct wiphy_work work;
	struct wiphy *wiphy;
	struct timer_list timer;
};

void wiphy_delayed_work_timer(struct timer_list *t);

static inline void wiphy_delayed_work_init(struct wiphy_delayed_work *dwork,
					   wiphy_work_func_t func)
{
	timer_setup(&dwork->timer, wiphy_delayed_work_timer, 0);
	wiphy_work_init(&dwork->work, func);
}

/**
 * wiphy_delayed_work_queue - queue delayed work for the wiphy
 * @wiphy: the wiphy to queue for
 * @dwork: the delayable worker
 * @delay: number of jiffies to wait before queueing
 *
 * This is useful for work that must be done asynchronously, and work
 * queued here has the special property that the wiphy mutex will be
 * held as if wiphy_lock() was called, and that it cannot be running
 * after wiphy_lock() was called. Therefore, wiphy_cancel_work() can
 * use just cancel_work() instead of cancel_work_sync(), it requires
 * being in a section protected by wiphy_lock().
 *
 * Note that these are scheduled with a timer where the accuracy
 * becomes less the longer in the future the scheduled timer is. Use
 * wiphy_hrtimer_work_queue() if the timer must be not be late by more
 * than approximately 10 percent.
 */
void wiphy_delayed_work_queue(struct wiphy *wiphy,
			      struct wiphy_delayed_work *dwork,
			      unsigned long delay);

/**
 * wiphy_delayed_work_cancel - cancel previously queued delayed work
 * @wiphy: the wiphy, for debug purposes
 * @dwork: the delayed work to cancel
 *
 * Cancel the work *without* waiting for it, this assumes being
 * called under the wiphy mutex acquired by wiphy_lock().
 */
void wiphy_delayed_work_cancel(struct wiphy *wiphy,
			       struct wiphy_delayed_work *dwork);

/**
 * wiphy_delayed_work_flush - flush previously queued delayed work
 * @wiphy: the wiphy, for debug purposes
 * @dwork: the delayed work to flush
 *
 * Flush the work (i.e. run it if pending). This must be called
 * under the wiphy mutex acquired by wiphy_lock().
 */
void wiphy_delayed_work_flush(struct wiphy *wiphy,
			      struct wiphy_delayed_work *dwork);

/**
 * wiphy_delayed_work_pending - Find out whether a wiphy delayable
 * work item is currently pending.
 *
 * @wiphy: the wiphy, for debug purposes
 * @dwork: the delayed work in question
 *
 * Return: true if timer is pending, false otherwise
 *
 * How wiphy_delayed_work_queue() works is by setting a timer which
 * when it expires calls wiphy_work_queue() to queue the wiphy work.
 * Because wiphy_delayed_work_queue() uses mod_timer(), if it is
 * called twice and the second call happens before the first call
 * deadline, the work will rescheduled for the second deadline and
 * won't run before that.
 *
 * wiphy_delayed_work_pending() can be used to detect if calling
 * wiphy_work_delayed_work_queue() would start a new work schedule
 * or delayed a previous one. As seen below it cannot be used to
 * detect precisely if the work has finished to execute nor if it
 * is currently executing.
 *
 *      CPU0                                CPU1
 * wiphy_delayed_work_queue(wk)
 *  mod_timer(wk->timer)
 *                                     wiphy_delayed_work_pending(wk) -> true
 *
 * [...]
 * expire_timers(wk->timer)
 *  detach_timer(wk->timer)
 *                                     wiphy_delayed_work_pending(wk) -> false
 *  wk->timer->function()                          |
 *   wiphy_work_queue(wk)                          | delayed work pending
 *    list_add_tail()                              | returns false but
 *    queue_work(cfg80211_wiphy_work)              | wk->func() has not
 *                                                 | been run yet
 * [...]                                           |
 *  cfg80211_wiphy_work()                          |
 *   wk->func()                                    V
 *
 */
bool wiphy_delayed_work_pending(struct wiphy *wiphy,
				struct wiphy_delayed_work *dwork);

struct wiphy_hrtimer_work {
	struct wiphy_work work;
	struct wiphy *wiphy;
	struct hrtimer timer;
};

enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t);

static inline void wiphy_hrtimer_work_init(struct wiphy_hrtimer_work *hrwork,
					   wiphy_work_func_t func)
{
	hrtimer_setup(&hrwork->timer, wiphy_hrtimer_work_timer,
		      CLOCK_BOOTTIME, HRTIMER_MODE_REL);
	wiphy_work_init(&hrwork->work, func);
}

/**
 * wiphy_hrtimer_work_queue - queue hrtimer work for the wiphy
 * @wiphy: the wiphy to queue for
 * @hrwork: the high resolution timer worker
 * @delay: the delay given as a ktime_t
 *
 * Please refer to wiphy_delayed_work_queue(). The difference is that
 * the hrtimer work uses a high resolution timer for scheduling. This
 * may be needed if timeouts might be scheduled further in the future
 * and the accuracy of the normal timer is not sufficient.
 *
 * Expect a delay of a few milliseconds as the timer is scheduled
 * with some slack and some more time may pass between queueing the
 * work and its start.
 */
void wiphy_hrtimer_work_queue(struct wiphy *wiphy,
			      struct wiphy_hrtimer_work *hrwork,
			      ktime_t delay);

/**
 * wiphy_hrtimer_work_cancel - cancel previously queued hrtimer work
 * @wiphy: the wiphy, for debug purposes
 * @hrtimer: the hrtimer work to cancel
 *
 * Cancel the work *without* waiting for it, this assumes being
 * called under the wiphy mutex acquired by wiphy_lock().
 */
void wiphy_hrtimer_work_cancel(struct wiphy *wiphy,
			       struct wiphy_hrtimer_work *hrtimer);

/**
 * wiphy_hrtimer_work_flush - flush previously queued hrtimer work
 * @wiphy: the wiphy, for debug purposes
 * @hrwork: the hrtimer work to flush
 *
 * Flush the work (i.e. run it if pending). This must be called
 * under the wiphy mutex acquired by wiphy_lock().
 */
void wiphy_hrtimer_work_flush(struct wiphy *wiphy,
			      struct wiphy_hrtimer_work *hrwork);

/**
 * wiphy_hrtimer_work_pending - Find out whether a wiphy hrtimer
 * work item is currently pending.
 *
 * @wiphy: the wiphy, for debug purposes
 * @hrwork: the hrtimer work in question
 *
 * Return: true if timer is pending, false otherwise
 *
 * Please refer to the wiphy_delayed_work_pending() documentation as
 * this is the equivalent function for hrtimer based delayed work
 * items.
 */
bool wiphy_hrtimer_work_pending(struct wiphy *wiphy,
				struct wiphy_hrtimer_work *hrwork);

/**
 * enum ieee80211_ap_reg_power - regulatory power for an Access Point
 *
 * @IEEE80211_REG_UNSET_AP: Access Point has no regulatory power mode
 * @IEEE80211_REG_LPI_AP: Indoor Access Point
 * @IEEE80211_REG_SP_AP: Standard power Access Point
 * @IEEE80211_REG_VLP_AP: Very low power Access Point
 */
enum ieee80211_ap_reg_power {
	IEEE80211_REG_UNSET_AP,
	IEEE80211_REG_LPI_AP,
	IEEE80211_REG_SP_AP,
	IEEE80211_REG_VLP_AP,
};

/**
 * struct wireless_dev - wireless device state
 *
 * For netdevs, this structure must be allocated by the driver
 * that uses the ieee80211_ptr field in struct net_device (this
 * is intentional so it can be allocated along with the netdev.)
 * It need not be registered then as netdev registration will
 * be intercepted by cfg80211 to see the new wireless device,
 * however, drivers must lock the wiphy before registering or
 * unregistering netdevs if they pre-create any netdevs (in ops
 * called from cfg80211, the wiphy is already locked.)
 *
 * For non-netdev uses, it must also be allocated by the driver
 * in response to the cfg80211 callbacks that require it, as
 * there's no netdev registration in that case it may not be
 * allocated outside of callback operations that return it.
 *
 * @wiphy: pointer to hardware description
 * @iftype: interface type
 * @registered: is this wdev already registered with cfg80211
 * @registering: indicates we're doing registration under wiphy lock
 *	for the notifier
 * @list: (private) Used to collect the interfaces
 * @netdev: (private) Used to reference back to the netdev, may be %NULL
 * @identifier: (private) Identifier used in nl80211 to identify this
 *	wireless device if it has no netdev
 * @u: union containing data specific to @iftype
 * @connected: indicates if connected or not (STA mode)
 * @wext: (private) Used by the internal wireless extensions compat code
 * @wext.ibss: (private) IBSS data part of wext handling
 * @wext.connect: (private) connection handling data
 * @wext.keys: (private) (WEP) key data
 * @wext.ie: (private) extra elements for association
 * @wext.ie_len: (private) length of extra elements
 * @wext.bssid: (private) selected network BSSID
 * @wext.ssid: (private) selected network SSID
 * @wext.default_key: (private) selected default key index
 * @wext.default_mgmt_key: (private) selected default management key index
 * @wext.prev_bssid: (private) previous BSSID for reassociation
 * @wext.prev_bssid_valid: (private) previous BSSID validity
 * @use_4addr: indicates 4addr mode is used on this interface, must be
 *	set by driver (if supported) on add_interface BEFORE registering the
 *	netdev and may otherwise be used by driver read-only, will be update
 *	by cfg80211 on change_interface
 * @mgmt_registrations: list of registrations for management frames
 * @mgmt_registrations_need_update: mgmt registrations were updated,
 *	need to propagate the update to the driver
 * @address: The address for this device, valid only if @netdev is %NULL
 * @is_running: true if this is a non-netdev device that has been started, e.g.
 *	the P2P Device.
 * @ps: powersave mode is enabled
 * @ps_timeout: dynamic powersave timeout
 * @ap_unexpected_nlportid: (private) netlink port ID of application
 *	registered for unexpected class 3 frames (AP mode)
 * @conn: (private) cfg80211 software SME connection state machine data
 * @connect_keys: (private) keys to set after connection is established
 * @conn_bss_type: connecting/connected BSS type
 * @conn_owner_nlportid: (private) connection owner socket port ID
 * @disconnect_wk: (private) auto-disconnect work
 * @disconnect_bssid: (private) the BSSID to use for auto-disconnect
 * @event_list: (private) list for internal event processing
 * @event_lock: (private) lock for event list
 * @owner_nlportid: (private) owner socket port ID
 * @nl_owner_dead: (private) owner socket went away
 * @cqm_rssi_work: (private) CQM RSSI reporting work
 * @cqm_config: (private) nl80211 RSSI monitor state
 * @pmsr_list: (private) peer measurement requests
 * @pmsr_lock: (private) peer measurements requests/results lock
 * @pmsr_free_wk: (private) peer measurements cleanup work
 * @unprot_beacon_reported: (private) timestamp of last
 *	unprotected beacon report
 * @links: array of %IEEE80211_MLD_MAX_NUM_LINKS elements containing @addr
 *	@ap and @client for each link
 * @links.cac_started: true if DFS channel availability check has been
 *	started
 * @links.cac_start_time: timestamp (jiffies) when the dfs state was
 *	entered.
 * @links.cac_time_ms: CAC time in ms
 * @valid_links: bitmap describing what elements of @links are valid
 * @radio_mask: Bitmask of radios that this interface is allowed to operate on.
 */
struct wireless_dev {
	struct wiphy *wiphy;
	enum nl80211_iftype iftype;

	/* the remainder of this struct should be private to cfg80211 */
	struct list_head list;
	struct net_device *netdev;

	u32 identifier;

	struct list_head mgmt_registrations;
	u8 mgmt_registrations_need_update:1;

	bool use_4addr, is_running, registered, registering;

	u8 address[ETH_ALEN] __aligned(sizeof(u16));

	/* currently used for IBSS and SME - might be rearranged later */
	struct cfg80211_conn *conn;
	struct cfg80211_cached_keys *connect_keys;
	enum ieee80211_bss_type conn_bss_type;
	u32 conn_owner_nlportid;

	struct work_struct disconnect_wk;
	u8 disconnect_bssid[ETH_ALEN];

	struct list_head event_list;
	spinlock_t event_lock;

	u8 connected:1;

	bool ps;
	int ps_timeout;

	u32 ap_unexpected_nlportid;

	u32 owner_nlportid;
	bool nl_owner_dead;

#ifdef CONFIG_CFG80211_WEXT
	/* wext data */
	struct {
		struct cfg80211_ibss_params ibss;
		struct cfg80211_connect_params connect;
		struct cfg80211_cached_keys *keys;
		const u8 *ie;
		size_t ie_len;
		u8 bssid[ETH_ALEN];
		u8 prev_bssid[ETH_ALEN];
		u8 ssid[IEEE80211_MAX_SSID_LEN];
		s8 default_key, default_mgmt_key;
		bool prev_bssid_valid;
	} wext;
#endif

	struct wiphy_work cqm_rssi_work;
	struct cfg80211_cqm_config __rcu *cqm_config;

	struct list_head pmsr_list;
	spinlock_t pmsr_lock;
	struct work_struct pmsr_free_wk;

	unsigned long unprot_beacon_reported;

	union {
		struct {
			u8 connected_addr[ETH_ALEN] __aligned(2);
			u8 ssid[IEEE80211_MAX_SSID_LEN];
			u8 ssid_len;
		} client;
		struct {
			int beacon_interval;
			struct cfg80211_chan_def preset_chandef;
			struct cfg80211_chan_def chandef;
			u8 id[IEEE80211_MAX_MESH_ID_LEN];
			u8 id_len, id_up_len;
		} mesh;
		struct {
			struct cfg80211_chan_def preset_chandef;
			u8 ssid[IEEE80211_MAX_SSID_LEN];
			u8 ssid_len;
		} ap;
		struct {
			struct cfg80211_internal_bss *current_bss;
			struct cfg80211_chan_def chandef;
			int beacon_interval;
			u8 ssid[IEEE80211_MAX_SSID_LEN];
			u8 ssid_len;
		} ibss;
		struct {
			struct cfg80211_chan_def chandef;
		} ocb;
		struct {
			u8 cluster_id[ETH_ALEN] __aligned(2);
		} nan;
	} u;

	struct {
		u8 addr[ETH_ALEN] __aligned(2);
		union {
			struct {
				unsigned int beacon_interval;
				struct cfg80211_chan_def chandef;
			} ap;
			struct {
				struct cfg80211_internal_bss *current_bss;
			} client;
		};

		bool cac_started;
		unsigned long cac_start_time;
		unsigned int cac_time_ms;
	} links[IEEE80211_MLD_MAX_NUM_LINKS];
	u16 valid_links;

	u32 radio_mask;
};

static inline const u8 *wdev_address(struct wireless_dev *wdev)
{
	if (wdev->netdev)
		return wdev->netdev->dev_addr;
	return wdev->address;
}

static inline bool wdev_running(struct wireless_dev *wdev)
{
	if (wdev->netdev)
		return netif_running(wdev->netdev);
	return wdev->is_running;
}

/**
 * wdev_priv - return wiphy priv from wireless_dev
 *
 * @wdev: The wireless device whose wiphy's priv pointer to return
 * Return: The wiphy priv of @wdev.
 */
static inline void *wdev_priv(struct wireless_dev *wdev)
{
	BUG_ON(!wdev);
	return wiphy_priv(wdev->wiphy);
}

/**
 * wdev_chandef - return chandef pointer from wireless_dev
 * @wdev: the wdev
 * @link_id: the link ID for MLO
 *
 * Return: The chandef depending on the mode, or %NULL.
 */
struct cfg80211_chan_def *wdev_chandef(struct wireless_dev *wdev,
				       unsigned int link_id);

static inline void WARN_INVALID_LINK_ID(struct wireless_dev *wdev,
					unsigned int link_id)
{
	WARN_ON(link_id && !wdev->valid_links);
	WARN_ON(wdev->valid_links &&
		!(wdev->valid_links & BIT(link_id)));
}

#define for_each_valid_link(link_info, link_id)			\
	for (link_id = 0;					\
	     link_id < ((link_info)->valid_links ?		\
			ARRAY_SIZE((link_info)->links) : 1);	\
	     link_id++)						\
		if (!(link_info)->valid_links ||		\
		    ((link_info)->valid_links & BIT(link_id)))

/**
 * DOC: Utility functions
 *
 * cfg80211 offers a number of utility functions that can be useful.
 */

/**
 * ieee80211_channel_equal - compare two struct ieee80211_channel
 *
 * @a: 1st struct ieee80211_channel
 * @b: 2nd struct ieee80211_channel
 * Return: true if center frequency of @a == @b
 */
static inline bool
ieee80211_channel_equal(struct ieee80211_channel *a,
			struct ieee80211_channel *b)
{
	return (a->center_freq == b->center_freq &&
		a->freq_offset == b->freq_offset);
}

/**
 * ieee80211_channel_to_khz - convert ieee80211_channel to frequency in KHz
 * @chan: struct ieee80211_channel to convert
 * Return: The corresponding frequency (in KHz)
 */
static inline u32
ieee80211_channel_to_khz(const struct ieee80211_channel *chan)
{
	return MHZ_TO_KHZ(chan->center_freq) + chan->freq_offset;
}

/**
 * ieee80211_channel_to_freq_khz - convert channel number to frequency
 * @chan: channel number
 * @band: band, necessary due to channel number overlap
 * Return: The corresponding frequency (in KHz), or 0 if the conversion failed.
 */
u32 ieee80211_channel_to_freq_khz(int chan, enum nl80211_band band);

/**
 * ieee80211_channel_to_frequency - convert channel number to frequency
 * @chan: channel number
 * @band: band, necessary due to channel number overlap
 * Return: The corresponding frequency (in MHz), or 0 if the conversion failed.
 */
static inline int
ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
{
	return KHZ_TO_MHZ(ieee80211_channel_to_freq_khz(chan, band));
}

/**
 * ieee80211_freq_khz_to_channel - convert frequency to channel number
 * @freq: center frequency in KHz
 * Return: The corresponding channel, or 0 if the conversion failed.
 */
int ieee80211_freq_khz_to_channel(u32 freq);

/**
 * ieee80211_frequency_to_channel - convert frequency to channel number
 * @freq: center frequency in MHz
 * Return: The corresponding channel, or 0 if the conversion failed.
 */
static inline int
ieee80211_frequency_to_channel(int freq)
{
	return ieee80211_freq_khz_to_channel(MHZ_TO_KHZ(freq));
}

/**
 * ieee80211_get_channel_khz - get channel struct from wiphy for specified
 * frequency
 * @wiphy: the struct wiphy to get the channel for
 * @freq: the center frequency (in KHz) of the channel
 * Return: The channel struct from @wiphy at @freq.
 */
struct ieee80211_channel *
ieee80211_get_channel_khz(struct wiphy *wiphy, u32 freq);

/**
 * ieee80211_get_channel - get channel struct from wiphy for specified frequency
 *
 * @wiphy: the struct wiphy to get the channel for
 * @freq: the center frequency (in MHz) of the channel
 * Return: The channel struct from @wiphy at @freq.
 */
static inline struct ieee80211_channel *
ieee80211_get_channel(struct wiphy *wiphy, int freq)
{
	return ieee80211_get_channel_khz(wiphy, MHZ_TO_KHZ(freq));
}

/**
 * cfg80211_channel_is_psc - Check if the channel is a 6 GHz PSC
 * @chan: control channel to check
 *
 * The Preferred Scanning Channels (PSC) are defined in
 * Draft IEEE P802.11ax/D5.0, 26.17.2.3.3
 *
 * Return: %true if channel is a PSC, %false otherwise
 */
static inline bool cfg80211_channel_is_psc(struct ieee80211_channel *chan)
{
	if (chan->band != NL80211_BAND_6GHZ)
		return false;

	return ieee80211_frequency_to_channel(chan->center_freq) % 16 == 5;
}

/**
 * ieee80211_radio_freq_range_valid - Check if the radio supports the
 * specified frequency range
 *
 * @radio: wiphy radio
 * @freq: the frequency (in KHz) to be queried
 * @width: the bandwidth (in KHz) to be queried
 *
 * Return: whether or not the given frequency range is valid for the given radio
 */
bool ieee80211_radio_freq_range_valid(const struct wiphy_radio *radio,
				      u32 freq, u32 width);

/**
 * cfg80211_radio_chandef_valid - Check if the radio supports the chandef
 *
 * @radio: wiphy radio
 * @chandef: chandef for current channel
 *
 * Return: whether or not the given chandef is valid for the given radio
 */
bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio,
				  const struct cfg80211_chan_def *chandef);

/**
 * cfg80211_wdev_channel_allowed - Check if the wdev may use the channel
 *
 * @wdev: the wireless device
 * @chan: channel to check
 *
 * Return: whether or not the wdev may use the channel
 */
bool cfg80211_wdev_channel_allowed(struct wireless_dev *wdev,
				   struct ieee80211_channel *chan);

/**
 * ieee80211_get_response_rate - get basic rate for a given rate
 *
 * @sband: the band to look for rates in
 * @basic_rates: bitmap of basic rates
 * @bitrate: the bitrate for which to find the basic rate
 *
 * Return: The basic rate corresponding to a given bitrate, that
 * is the next lower bitrate contained in the basic rate map,
 * which is, for this function, given as a bitmap of indices of
 * rates in the band's bitrate table.
 */
const struct ieee80211_rate *
ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
			    u32 basic_rates, int bitrate);

/**
 * ieee80211_mandatory_rates - get mandatory rates for a given band
 * @sband: the band to look for rates in
 *
 * Return: a bitmap of the mandatory rates for the given band, bits
 * are set according to the rate position in the bitrates array.
 */
u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband);

/*
 * Radiotap parsing functions -- for controlled injection support
 *
 * Implemented in net/wireless/radiotap.c
 * Documentation in Documentation/networking/radiotap-headers.rst
 */

struct radiotap_align_size {
	uint8_t align:4, size:4;
};

struct ieee80211_radiotap_namespace {
	const struct radiotap_align_size *align_size;
	int n_bits;
	uint32_t oui;
	uint8_t subns;
};

struct ieee80211_radiotap_vendor_namespaces {
	const struct ieee80211_radiotap_namespace *ns;
	int n_ns;
};

/**
 * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
 * @this_arg_index: index of current arg, valid after each successful call
 *	to ieee80211_radiotap_iterator_next()
 * @this_arg: pointer to current radiotap arg; it is valid after each
 *	call to ieee80211_radiotap_iterator_next() but also after
 *	ieee80211_radiotap_iterator_init() where it will point to
 *	the beginning of the actual data portion
 * @this_arg_size: length of the current arg, for convenience
 * @current_namespace: pointer to the current namespace definition
 *	(or internally %NULL if the current namespace is unknown)
 * @is_radiotap_ns: indicates whether the current namespace is the default
 *	radiotap namespace or not
 *
 * @_rtheader: pointer to the radiotap header we are walking through
 * @_max_length: length of radiotap header in cpu byte ordering
 * @_arg_index: next argument index
 * @_arg: next argument pointer
 * @_next_bitmap: internal pointer to next present u32
 * @_bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present
 * @_vns: vendor namespace definitions
 * @_next_ns_data: beginning of the next namespace's data
 * @_reset_on_ext: internal; reset the arg index to 0 when going to the
 *	next bitmap word
 *
 * Describes the radiotap parser state. Fields prefixed with an underscore
 * must not be used by users of the parser, only by the parser internally.
 */

struct ieee80211_radiotap_iterator {
	struct ieee80211_radiotap_header *_rtheader;
	const struct ieee80211_radiotap_vendor_namespaces *_vns;
	const struct ieee80211_radiotap_namespace *current_namespace;

	unsigned char *_arg, *_next_ns_data;
	__le32 *_next_bitmap;

	unsigned char *this_arg;
	int this_arg_index;
	int this_arg_size;

	int is_radiotap_ns;

	int _max_length;
	int _arg_index;
	uint32_t _bitmap_shifter;
	int _reset_on_ext;
};

int
ieee80211_radiotap_iterator_init(struct ieee80211_radiotap_iterator *iterator,
				 struct ieee80211_radiotap_header *radiotap_header,
				 int max_length,
				 const struct ieee80211_radiotap_vendor_namespaces *vns);

int
ieee80211_radiotap_iterator_next(struct ieee80211_radiotap_iterator *iterator);


extern const unsigned char rfc1042_header[6];
extern const unsigned char bridge_tunnel_header[6];

/**
 * ieee80211_get_hdrlen_from_skb - get header length from data
 *
 * @skb: the frame
 *
 * Given an skb with a raw 802.11 header at the data pointer this function
 * returns the 802.11 header length.
 *
 * Return: The 802.11 header length in bytes (not including encryption
 * headers). Or 0 if the data in the sk_buff is too short to contain a valid
 * 802.11 header.
 */
unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);

/**
 * ieee80211_hdrlen - get header length in bytes from frame control
 * @fc: frame control field in little-endian format
 * Return: The header length in bytes.
 */
unsigned int __attribute_const__ ieee80211_hdrlen(__le16 fc);

/**
 * ieee80211_get_mesh_hdrlen - get mesh extension header length
 * @meshhdr: the mesh extension header, only the flags field
 *	(first byte) will be accessed
 * Return: The length of the extension header, which is always at
 * least 6 bytes and at most 18 if address 5 and 6 are present.
 */
unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr);

/**
 * DOC: Data path helpers
 *
 * In addition to generic utilities, cfg80211 also offers
 * functions that help implement the data path for devices
 * that do not do the 802.11/802.3 conversion on the device.
 */

/**
 * ieee80211_data_to_8023_exthdr - convert an 802.11 data frame to 802.3
 * @skb: the 802.11 data frame
 * @ehdr: pointer to a &struct ethhdr that will get the header, instead
 *	of it being pushed into the SKB
 * @addr: the device MAC address
 * @iftype: the virtual interface type
 * @data_offset: offset of payload after the 802.11 header
 * @is_amsdu: true if the 802.11 header is A-MSDU
 * Return: 0 on success. Non-zero on error.
 */
int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
				  const u8 *addr, enum nl80211_iftype iftype,
				  u8 data_offset, bool is_amsdu);

/**
 * ieee80211_data_to_8023 - convert an 802.11 data frame to 802.3
 * @skb: the 802.11 data frame
 * @addr: the device MAC address
 * @iftype: the virtual interface type
 * Return: 0 on success. Non-zero on error.
 */
static inline int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
					 enum nl80211_iftype iftype)
{
	return ieee80211_data_to_8023_exthdr(skb, NULL, addr, iftype, 0, false);
}

/**
 * ieee80211_is_valid_amsdu - check if subframe lengths of an A-MSDU are valid
 *
 * This is used to detect non-standard A-MSDU frames, e.g. the ones generated
 * by ath10k and ath11k, where the subframe length includes the length of the
 * mesh control field.
 *
 * @skb: The input A-MSDU frame without any headers.
 * @mesh_hdr: the type of mesh header to test
 *	0: non-mesh A-MSDU length field
 *	1: big-endian mesh A-MSDU length field
 *	2: little-endian mesh A-MSDU length field
 * Returns: true if subframe header lengths are valid for the @mesh_hdr mode
 */
bool ieee80211_is_valid_amsdu(struct sk_buff *skb, u8 mesh_hdr);

/**
 * ieee80211_amsdu_to_8023s - decode an IEEE 802.11n A-MSDU frame
 *
 * Decode an IEEE 802.11 A-MSDU and convert it to a list of 802.3 frames.
 * The @list will be empty if the decode fails. The @skb must be fully
 * header-less before being passed in here; it is freed in this function.
 *
 * @skb: The input A-MSDU frame without any headers.
 * @list: The output list of 802.3 frames. It must be allocated and
 *	initialized by the caller.
 * @addr: The device MAC address.
 * @iftype: The device interface type.
 * @extra_headroom: The hardware extra headroom for SKBs in the @list.
 * @check_da: DA to check in the inner ethernet header, or NULL
 * @check_sa: SA to check in the inner ethernet header, or NULL
 * @mesh_control: see mesh_hdr in ieee80211_is_valid_amsdu
 */
void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
			      const u8 *addr, enum nl80211_iftype iftype,
			      const unsigned int extra_headroom,
			      const u8 *check_da, const u8 *check_sa,
			      u8 mesh_control);

/**
 * ieee80211_get_8023_tunnel_proto - get RFC1042 or bridge tunnel encap protocol
 *
 * Check for RFC1042 or bridge tunnel header and fetch the encapsulated
 * protocol.
 *
 * @hdr: pointer to the MSDU payload
 * @proto: destination pointer to store the protocol
 * Return: true if encapsulation was found
 */
bool ieee80211_get_8023_tunnel_proto(const void *hdr, __be16 *proto);

/**
 * ieee80211_strip_8023_mesh_hdr - strip mesh header from converted 802.3 frames
 *
 * Strip the mesh header, which was left in by ieee80211_data_to_8023 as part
 * of the MSDU data. Also move any source/destination addresses from the mesh
 * header to the ethernet header (if present).
 *
 * @skb: The 802.3 frame with embedded mesh header
 *
 * Return: 0 on success. Non-zero on error.
 */
int ieee80211_strip_8023_mesh_hdr(struct sk_buff *skb);

/**
 * cfg80211_classify8021d - determine the 802.1p/1d tag for a data frame
 * @skb: the data frame
 * @qos_map: Interworking QoS mapping or %NULL if not in use
 * Return: The 802.1p/1d tag.
 */
unsigned int cfg80211_classify8021d(struct sk_buff *skb,
				    struct cfg80211_qos_map *qos_map);

/**
 * cfg80211_find_elem_match - match information element and byte array in data
 *
 * @eid: element ID
 * @ies: data consisting of IEs
 * @len: length of data
 * @match: byte array to match
 * @match_len: number of bytes in the match array
 * @match_offset: offset in the IE data where the byte array should match.
 *	Note the difference to cfg80211_find_ie_match() which considers
 *	the offset to start from the element ID byte, but here we take
 *	the data portion instead.
 *
 * Return: %NULL if the element ID could not be found or if
 * the element is invalid (claims to be longer than the given
 * data) or if the byte array doesn't match; otherwise return the
 * requested element struct.
 *
 * Note: There are no checks on the element length other than
 * having to fit into the given data and being large enough for the
 * byte array to match.
 */
const struct element *
cfg80211_find_elem_match(u8 eid, const u8 *ies, unsigned int len,
			 const u8 *match, unsigned int match_len,
			 unsigned int match_offset);

/**
 * cfg80211_find_ie_match - match information element and byte array in data
 *
 * @eid: element ID
 * @ies: data consisting of IEs
 * @len: length of data
 * @match: byte array to match
 * @match_len: number of bytes in the match array
 * @match_offset: offset in the IE where the byte array should match.
 *	If match_len is zero, this must also be set to zero.
 *	Otherwise this must be set to 2 or more, because the first
 *	byte is the element id, which is already compared to eid, and
 *	the second byte is the IE length.
 *
 * Return: %NULL if the element ID could not be found or if
 * the element is invalid (claims to be longer than the given
 * data) or if the byte array doesn't match, or a pointer to the first
 * byte of the requested element, that is the byte containing the
 * element ID.
 *
 * Note: There are no checks on the element length other than
 * having to fit into the given data and being large enough for the
 * byte array to match.
 */
static inline const u8 *
cfg80211_find_ie_match(u8 eid, const u8 *ies, unsigned int len,
		       const u8 *match, unsigned int match_len,
		       unsigned int match_offset)
{
	/* match_offset can't be smaller than 2, unless match_len is
	 * zero, in which case match_offset must be zero as well.
	 */
	if (WARN_ON((match_len && match_offset < 2) ||
		    (!match_len && match_offset)))
		return NULL;

	return (const void *)cfg80211_find_elem_match(eid, ies, len,
						      match, match_len,
						      match_offset ?
							match_offset - 2 : 0);
}

/**
 * cfg80211_find_elem - find information element in data
 *
 * @eid: element ID
 * @ies: data consisting of IEs
 * @len: length of data
 *
 * Return: %NULL if the element ID could not be found or if
 * the element is invalid (claims to be longer than the given
 * data) or if the byte array doesn't match; otherwise return the
 * requested element struct.
 *
 * Note: There are no checks on the element length other than
 * having to fit into the given data.
 */
static inline const struct element *
cfg80211_find_elem(u8 eid, const u8 *ies, int len)
{
	return cfg80211_find_elem_match(eid, ies, len, NULL, 0, 0);
}

/**
 * cfg80211_find_ie - find information element in data
 *
 * @eid: element ID
 * @ies: data consisting of IEs
 * @len: length of data
 *
 * Return: %NULL if the element ID could not be found or if
 * the element is invalid (claims to be longer than the given
 * data), or a pointer to the first byte of the requested
 * element, that is the byte containing the element ID.
 *
 * Note: There are no checks on the element length other than
 * having to fit into the given data.
 */
static inline const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len)
{
	return cfg80211_find_ie_match(eid, ies, len, NULL, 0, 0);
}

/**
 * cfg80211_find_ext_elem - find information element with EID Extension in data
 *
 * @ext_eid: element ID Extension
 * @ies: data consisting of IEs
 * @len: length of data
 *
 * Return: %NULL if the extended element could not be found or if
 * the element is invalid (claims to be longer than the given
 * data) or if the byte array doesn't match; otherwise return the
 * requested element struct.
 *
 * Note: There are no checks on the element length other than
 * having to fit into the given data.
 */
static inline const struct element *
cfg80211_find_ext_elem(u8 ext_eid, const u8 *ies, int len)
{
	return cfg80211_find_elem_match(WLAN_EID_EXTENSION, ies, len,
					&ext_eid, 1, 0);
}

/**
 * cfg80211_find_ext_ie - find information element with EID Extension in data
 *
 * @ext_eid: element ID Extension
 * @ies: data consisting of IEs
 * @len: length of data
 *
 * Return: %NULL if the extended element ID could not be found or if
 * the element is invalid (claims to be longer than the given
 * data), or a pointer to the first byte of the requested
 * element, that is the byte containing the element ID.
 *
 * Note: There are no checks on the element length other than
 * having to fit into the given data.
 */
static inline const u8 *cfg80211_find_ext_ie(u8 ext_eid, const u8 *ies, int len)
{
	return cfg80211_find_ie_match(WLAN_EID_EXTENSION, ies, len,
				      &ext_eid, 1, 2);
}

/**
 * cfg80211_find_vendor_elem - find vendor specific information element in data
 *
 * @oui: vendor OUI
 * @oui_type: vendor-specific OUI type (must be < 0xff), negative means any
 * @ies: data consisting of IEs
 * @len: length of data
 *
 * Return: %NULL if the vendor specific element ID could not be found or if the
 * element is invalid (claims to be longer than the given data); otherwise
 * return the element structure for the requested element.
 *
 * Note: There are no checks on the element length other than having to fit into
 * the given data.
 */
const struct element *cfg80211_find_vendor_elem(unsigned int oui, int oui_type,
						const u8 *ies,
						unsigned int len);

/**
 * cfg80211_find_vendor_ie - find vendor specific information element in data
 *
 * @oui: vendor OUI
 * @oui_type: vendor-specific OUI type (must be < 0xff), negative means any
 * @ies: data consisting of IEs
 * @len: length of data
 *
 * Return: %NULL if the vendor specific element ID could not be found or if the
 * element is invalid (claims to be longer than the given data), or a pointer to
 * the first byte of the requested element, that is the byte containing the
 * element ID.
 *
 * Note: There are no checks on the element length other than having to fit into
 * the given data.
 */
static inline const u8 *
cfg80211_find_vendor_ie(unsigned int oui, int oui_type,
			const u8 *ies, unsigned int len)
{
	return (const void *)cfg80211_find_vendor_elem(oui, oui_type, ies, len);
}

/**
 * enum cfg80211_rnr_iter_ret - reduced neighbor report iteration state
 * @RNR_ITER_CONTINUE: continue iterating with the next entry
 * @RNR_ITER_BREAK: break iteration and return success
 * @RNR_ITER_ERROR: break iteration and return error
 */
enum cfg80211_rnr_iter_ret {
	RNR_ITER_CONTINUE,
	RNR_ITER_BREAK,
	RNR_ITER_ERROR,
};

/**
 * cfg80211_iter_rnr - iterate reduced neighbor report entries
 * @elems: the frame elements to iterate RNR elements and then
 *	their entries in
 * @elems_len: length of the elements
 * @iter: iteration function, see also &enum cfg80211_rnr_iter_ret
 *	for the return value
 * @iter_data: additional data passed to the iteration function
 * Return: %true on success (after successfully iterating all entries
 *	or if the iteration function returned %RNR_ITER_BREAK),
 *	%false on error (iteration function returned %RNR_ITER_ERROR
 *	or elements were malformed.)
 */
bool cfg80211_iter_rnr(const u8 *elems, size_t elems_len,
		       enum cfg80211_rnr_iter_ret
		       (*iter)(void *data, u8 type,
			       const struct ieee80211_neighbor_ap_info *info,
			       const u8 *tbtt_info, u8 tbtt_info_len),
		       void *iter_data);

/**
 * cfg80211_defragment_element - Defrag the given element data into a buffer
 *
 * @elem: the element to defragment
 * @ies: elements where @elem is contained
 * @ieslen: length of @ies
 * @data: buffer to store element data, or %NULL to just determine size
 * @data_len: length of @data, or 0
 * @frag_id: the element ID of fragments
 *
 * Return: length of @data, or -EINVAL on error
 *
 * Copy out all data from an element that may be fragmented into @data, while
 * skipping all headers.
 *
 * The function uses memmove() internally. It is acceptable to defragment an
 * element in-place.
 */
ssize_t cfg80211_defragment_element(const struct element *elem, const u8 *ies,
				    size_t ieslen, u8 *data, size_t data_len,
				    u8 frag_id);

/**
 * cfg80211_send_layer2_update - send layer 2 update frame
 *
 * @dev: network device
 * @addr: STA MAC address
 *
 * Wireless drivers can use this function to update forwarding tables in bridge
 * devices upon STA association.
 */
void cfg80211_send_layer2_update(struct net_device *dev, const u8 *addr);

/**
 * DOC: Regulatory enforcement infrastructure
 *
 * TODO
 */

/**
 * regulatory_hint - driver hint to the wireless core a regulatory domain
 * @wiphy: the wireless device giving the hint (used only for reporting
 *	conflicts)
 * @alpha2: the ISO/IEC 3166 alpha2 the driver claims its regulatory domain
 *	should be in. If @rd is set this should be NULL. Note that if you
 *	set this to NULL you should still set rd->alpha2 to some accepted
 *	alpha2.
 *
 * Wireless drivers can use this function to hint to the wireless core
 * what it believes should be the current regulatory domain by
 * giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory
 * domain should be in or by providing a completely build regulatory domain.
 * If the driver provides an ISO/IEC 3166 alpha2 userspace will be queried
 * for a regulatory domain structure for the respective country.
 *
 * The wiphy must have been registered to cfg80211 prior to this call.
 * For cfg80211 drivers this means you must first use wiphy_register(),
 * for mac80211 drivers you must first use ieee80211_register_hw().
 *
 * Drivers should check the return value, its possible you can get
 * an -ENOMEM.
 *
 * Return: 0 on success. -ENOMEM.
 */
int regulatory_hint(struct wiphy *wiphy, const char *alpha2);

/**
 * regulatory_set_wiphy_regd - set regdom info for self managed drivers
 * @wiphy: the wireless device we want to process the regulatory domain on
 * @rd: the regulatory domain information to use for this wiphy
 *
 * Set the regulatory domain information for self-managed wiphys, only they
 * may use this function. See %REGULATORY_WIPHY_SELF_MANAGED for more
 * information.
 *
 * Return: 0 on success. -EINVAL, -EPERM
 */
int regulatory_set_wiphy_regd(struct wiphy *wiphy,
			      struct ieee80211_regdomain *rd);

/**
 * regulatory_set_wiphy_regd_sync - set regdom for self-managed drivers
 * @wiphy: the wireless device we want to process the regulatory domain on
 * @rd: the regulatory domain information to use for this wiphy
 *
 * This functions requires the RTNL and the wiphy mutex to be held and
 * applies the new regdomain synchronously to this wiphy. For more details
 * see regulatory_set_wiphy_regd().
 *
 * Return: 0 on success. -EINVAL, -EPERM
 */
int regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
				   struct ieee80211_regdomain *rd);

/**
 * wiphy_apply_custom_regulatory - apply a custom driver regulatory domain
 * @wiphy: the wireless device we want to process the regulatory domain on
 * @regd: the custom regulatory domain to use for this wiphy
 *
 * Drivers can sometimes have custom regulatory domains which do not apply
 * to a specific country. Drivers can use this to apply such custom regulatory
 * domains. This routine must be called prior to wiphy registration. The
 * custom regulatory domain will be trusted completely and as such previous
 * default channel settings will be disregarded. If no rule is found for a
 * channel on the regulatory domain the channel will be disabled.
 * Drivers using this for a wiphy should also set the wiphy flag
 * REGULATORY_CUSTOM_REG or cfg80211 will set it for the wiphy
 * that called this helper.
 */
void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
				   const struct ieee80211_regdomain *regd);

/**
 * freq_reg_info - get regulatory information for the given frequency
 * @wiphy: the wiphy for which we want to process this rule for
 * @center_freq: Frequency in KHz for which we want regulatory information for
 *
 * Use this function to get the regulatory rule for a specific frequency on
 * a given wireless device. If the device has a specific regulatory domain
 * it wants to follow we respect that unless a country IE has been received
 * and processed already.
 *
 * Return: A valid pointer, or, when an error occurs, for example if no rule
 * can be found, the return value is encoded using ERR_PTR(). Use IS_ERR() to
 * check and PTR_ERR() to obtain the numeric return value. The numeric return
 * value will be -ERANGE if we determine the given center_freq does not even
 * have a regulatory rule for a frequency range in the center_freq's band.
 * See freq_in_rule_band() for our current definition of a band -- this is
 * purely subjective and right now it's 802.11 specific.
 */
const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
					       u32 center_freq);

/**
 * reg_initiator_name - map regulatory request initiator enum to name
 * @initiator: the regulatory request initiator
 *
 * You can use this to map the regulatory request initiator enum to a
 * proper string representation.
 *
 * Return: pointer to string representation of the initiator
 */
const char *reg_initiator_name(enum nl80211_reg_initiator initiator);

/**
 * regulatory_pre_cac_allowed - check if pre-CAC allowed in the current regdom
 * @wiphy: wiphy for which pre-CAC capability is checked.
 *
 * Pre-CAC is allowed only in some regdomains (notable ETSI).
 *
 * Return: %true if allowed, %false otherwise
 */
bool regulatory_pre_cac_allowed(struct wiphy *wiphy);

/**
 * DOC: Internal regulatory db functions
 *
 */

/**
 * reg_query_regdb_wmm -  Query internal regulatory db for wmm rule
 * Regulatory self-managed driver can use it to proactively
 *
 * @alpha2: the ISO/IEC 3166 alpha2 wmm rule to be queried.
 * @freq: the frequency (in MHz) to be queried.
 * @rule: pointer to store the wmm rule from the regulatory db.
 *
 * Self-managed wireless drivers can use this function to  query
 * the internal regulatory database to check whether the given
 * ISO/IEC 3166 alpha2 country and freq have wmm rule limitations.
 *
 * Drivers should check the return value, its possible you can get
 * an -ENODATA.
 *
 * Return: 0 on success. -ENODATA.
 */
int reg_query_regdb_wmm(char *alpha2, int freq,
			struct ieee80211_reg_rule *rule);

/*
 * callbacks for asynchronous cfg80211 methods, notification
 * functions and BSS handling helpers
 */

/**
 * cfg80211_scan_done - notify that scan finished
 *
 * @request: the corresponding scan request
 * @info: information about the completed scan
 */
void cfg80211_scan_done(struct cfg80211_scan_request *request,
			struct cfg80211_scan_info *info);

/**
 * cfg80211_sched_scan_results - notify that new scan results are available
 *
 * @wiphy: the wiphy which got scheduled scan results
 * @reqid: identifier for the related scheduled scan request
 */
void cfg80211_sched_scan_results(struct wiphy *wiphy, u64 reqid);

/**
 * cfg80211_sched_scan_stopped - notify that the scheduled scan has stopped
 *
 * @wiphy: the wiphy on which the scheduled scan stopped
 * @reqid: identifier for the related scheduled scan request
 *
 * The driver can call this function to inform cfg80211 that the
 * scheduled scan had to be stopped, for whatever reason.  The driver
 * is then called back via the sched_scan_stop operation when done.
 */
void cfg80211_sched_scan_stopped(struct wiphy *wiphy, u64 reqid);

/**
 * cfg80211_sched_scan_stopped_locked - notify that the scheduled scan has stopped
 *
 * @wiphy: the wiphy on which the scheduled scan stopped
 * @reqid: identifier for the related scheduled scan request
 *
 * The driver can call this function to inform cfg80211 that the
 * scheduled scan had to be stopped, for whatever reason.  The driver
 * is then called back via the sched_scan_stop operation when done.
 * This function should be called with the wiphy mutex held.
 */
void cfg80211_sched_scan_stopped_locked(struct wiphy *wiphy, u64 reqid);

/**
 * cfg80211_inform_bss_frame_data - inform cfg80211 of a received BSS frame
 * @wiphy: the wiphy reporting the BSS
 * @data: the BSS metadata
 * @mgmt: the management frame (probe response or beacon)
 * @len: length of the management frame
 * @gfp: context flags
 *
 * This informs cfg80211 that BSS information was found and
 * the BSS should be updated/added.
 *
 * Return: A referenced struct, must be released with cfg80211_put_bss()!
 * Or %NULL on error.
 */
struct cfg80211_bss * __must_check
cfg80211_inform_bss_frame_data(struct wiphy *wiphy,
			       struct cfg80211_inform_bss *data,
			       struct ieee80211_mgmt *mgmt, size_t len,
			       gfp_t gfp);

static inline struct cfg80211_bss * __must_check
cfg80211_inform_bss_frame(struct wiphy *wiphy,
			  struct ieee80211_channel *rx_channel,
			  struct ieee80211_mgmt *mgmt, size_t len,
			  s32 signal, gfp_t gfp)
{
	struct cfg80211_inform_bss data = {
		.chan = rx_channel,
		.signal = signal,
	};

	return cfg80211_inform_bss_frame_data(wiphy, &data, mgmt, len, gfp);
}

/**
 * cfg80211_gen_new_bssid - generate a nontransmitted BSSID for multi-BSSID
 * @bssid: transmitter BSSID
 * @max_bssid: max BSSID indicator, taken from Multiple BSSID element
 * @mbssid_index: BSSID index, taken from Multiple BSSID index element
 * @new_bssid: calculated nontransmitted BSSID
 */
static inline void cfg80211_gen_new_bssid(const u8 *bssid, u8 max_bssid,
					  u8 mbssid_index, u8 *new_bssid)
{
	u64 bssid_u64 = ether_addr_to_u64(bssid);
	u64 mask = GENMASK_ULL(max_bssid - 1, 0);
	u64 new_bssid_u64;

	new_bssid_u64 = bssid_u64 & ~mask;

	new_bssid_u64 |= ((bssid_u64 & mask) + mbssid_index) & mask;

	u64_to_ether_addr(new_bssid_u64, new_bssid);
}

/**
 * cfg80211_is_element_inherited - returns if element ID should be inherited
 * @element: element to check
 * @non_inherit_element: non inheritance element
 *
 * Return: %true if should be inherited, %false otherwise
 */
bool cfg80211_is_element_inherited(const struct element *element,
				   const struct element *non_inherit_element);

/**
 * cfg80211_merge_profile - merges a MBSSID profile if it is split between IEs
 * @ie: ies
 * @ielen: length of IEs
 * @mbssid_elem: current MBSSID element
 * @sub_elem: current MBSSID subelement (profile)
 * @merged_ie: location of the merged profile
 * @max_copy_len: max merged profile length
 *
 * Return: the number of bytes merged
 */
size_t cfg80211_merge_profile(const u8 *ie, size_t ielen,
			      const struct element *mbssid_elem,
			      const struct element *sub_elem,
			      u8 *merged_ie, size_t max_copy_len);

/**
 * enum cfg80211_bss_frame_type - frame type that the BSS data came from
 * @CFG80211_BSS_FTYPE_UNKNOWN: driver doesn't know whether the data is
 *	from a beacon or probe response
 * @CFG80211_BSS_FTYPE_BEACON: data comes from a beacon
 * @CFG80211_BSS_FTYPE_PRESP: data comes from a probe response
 * @CFG80211_BSS_FTYPE_S1G_BEACON: data comes from an S1G beacon
 */
enum cfg80211_bss_frame_type {
	CFG80211_BSS_FTYPE_UNKNOWN,
	CFG80211_BSS_FTYPE_BEACON,
	CFG80211_BSS_FTYPE_PRESP,
	CFG80211_BSS_FTYPE_S1G_BEACON,
};

/**
 * cfg80211_get_ies_channel_number - returns the channel number from ies
 * @ie: IEs
 * @ielen: length of IEs
 * @band: enum nl80211_band of the channel
 *
 * Return: the channel number, or -1 if none could be determined.
 */
int cfg80211_get_ies_channel_number(const u8 *ie, size_t ielen,
				    enum nl80211_band band);

/**
 * cfg80211_ssid_eq - compare two SSIDs
 * @a: first SSID
 * @b: second SSID
 *
 * Return: %true if SSIDs are equal, %false otherwise.
 */
static inline bool
cfg80211_ssid_eq(struct cfg80211_ssid *a, struct cfg80211_ssid *b)
{
	if (WARN_ON(!a || !b))
		return false;
	if (a->ssid_len != b->ssid_len)
		return false;
	return memcmp(a->ssid, b->ssid, a->ssid_len) ? false : true;
}

/**
 * cfg80211_inform_bss_data - inform cfg80211 of a new BSS
 *
 * @wiphy: the wiphy reporting the BSS
 * @data: the BSS metadata
 * @ftype: frame type (if known)
 * @bssid: the BSSID of the BSS
 * @tsf: the TSF sent by the peer in the beacon/probe response (or 0)
 * @capability: the capability field sent by the peer
 * @beacon_interval: the beacon interval announced by the peer
 * @ie: additional IEs sent by the peer
 * @ielen: length of the additional IEs
 * @gfp: context flags
 *
 * This informs cfg80211 that BSS information was found and
 * the BSS should be updated/added.
 *
 * Return: A referenced struct, must be released with cfg80211_put_bss()!
 * Or %NULL on error.
 */
struct cfg80211_bss * __must_check
cfg80211_inform_bss_data(struct wiphy *wiphy,
			 struct cfg80211_inform_bss *data,
			 enum cfg80211_bss_frame_type ftype,
			 const u8 *bssid, u64 tsf, u16 capability,
			 u16 beacon_interval, const u8 *ie, size_t ielen,
			 gfp_t gfp);

static inline struct cfg80211_bss * __must_check
cfg80211_inform_bss(struct wiphy *wiphy,
		    struct ieee80211_channel *rx_channel,
		    enum cfg80211_bss_frame_type ftype,
		    const u8 *bssid, u64 tsf, u16 capability,
		    u16 beacon_interval, const u8 *ie, size_t ielen,
		    s32 signal, gfp_t gfp)
{
	struct cfg80211_inform_bss data = {
		.chan = rx_channel,
		.signal = signal,
	};

	return cfg80211_inform_bss_data(wiphy, &data, ftype, bssid, tsf,
					capability, beacon_interval, ie, ielen,
					gfp);
}

/**
 * __cfg80211_get_bss - get a BSS reference
 * @wiphy: the wiphy this BSS struct belongs to
 * @channel: the channel to search on (or %NULL)
 * @bssid: the desired BSSID (or %NULL)
 * @ssid: the desired SSID (or %NULL)
 * @ssid_len: length of the SSID (or 0)
 * @bss_type: type of BSS, see &enum ieee80211_bss_type
 * @privacy: privacy filter, see &enum ieee80211_privacy
 * @use_for: indicates which use is intended
 *
 * Return: Reference-counted BSS on success. %NULL on error.
 */
struct cfg80211_bss *__cfg80211_get_bss(struct wiphy *wiphy,
					struct ieee80211_channel *channel,
					const u8 *bssid,
					const u8 *ssid, size_t ssid_len,
					enum ieee80211_bss_type bss_type,
					enum ieee80211_privacy privacy,
					u32 use_for);

/**
 * cfg80211_get_bss - get a BSS reference
 * @wiphy: the wiphy this BSS struct belongs to
 * @channel: the channel to search on (or %NULL)
 * @bssid: the desired BSSID (or %NULL)
 * @ssid: the desired SSID (or %NULL)
 * @ssid_len: length of the SSID (or 0)
 * @bss_type: type of BSS, see &enum ieee80211_bss_type
 * @privacy: privacy filter, see &enum ieee80211_privacy
 *
 * This version implies regular usage, %NL80211_BSS_USE_FOR_NORMAL.
 *
 * Return: Reference-counted BSS on success. %NULL on error.
 */
static inline struct cfg80211_bss *
cfg80211_get_bss(struct wiphy *wiphy, struct ieee80211_channel *channel,
		 const u8 *bssid, const u8 *ssid, size_t ssid_len,
		 enum ieee80211_bss_type bss_type,
		 enum ieee80211_privacy privacy)
{
	return __cfg80211_get_bss(wiphy, channel, bssid, ssid, ssid_len,
				  bss_type, privacy,
				  NL80211_BSS_USE_FOR_NORMAL);
}

static inline struct cfg80211_bss *
cfg80211_get_ibss(struct wiphy *wiphy,
		  struct ieee80211_channel *channel,
		  const u8 *ssid, size_t ssid_len)
{
	return cfg80211_get_bss(wiphy, channel, NULL, ssid, ssid_len,
				IEEE80211_BSS_TYPE_IBSS,
				IEEE80211_PRIVACY_ANY);
}

/**
 * cfg80211_ref_bss - reference BSS struct
 * @wiphy: the wiphy this BSS struct belongs to
 * @bss: the BSS struct to reference
 *
 * Increments the refcount of the given BSS struct.
 */
void cfg80211_ref_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);

/**
 * cfg80211_put_bss - unref BSS struct
 * @wiphy: the wiphy this BSS struct belongs to
 * @bss: the BSS struct
 *
 * Decrements the refcount of the given BSS struct.
 */
void cfg80211_put_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);

/**
 * cfg80211_unlink_bss - unlink BSS from internal data structures
 * @wiphy: the wiphy
 * @bss: the bss to remove
 *
 * This function removes the given BSS from the internal data structures
 * thereby making it no longer show up in scan results etc. Use this
 * function when you detect a BSS is gone. Normally BSSes will also time
 * out, so it is not necessary to use this function at all.
 */
void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);

/**
 * cfg80211_bss_iter - iterate all BSS entries
 *
 * This function iterates over the BSS entries associated with the given wiphy
 * and calls the callback for the iterated BSS. The iterator function is not
 * allowed to call functions that might modify the internal state of the BSS DB.
 *
 * @wiphy: the wiphy
 * @chandef: if given, the iterator function will be called only if the channel
 *     of the currently iterated BSS is a subset of the given channel.
 * @iter: the iterator function to call
 * @iter_data: an argument to the iterator function
 */
void cfg80211_bss_iter(struct wiphy *wiphy,
		       struct cfg80211_chan_def *chandef,
		       void (*iter)(struct wiphy *wiphy,
				    struct cfg80211_bss *bss,
				    void *data),
		       void *iter_data);

/**
 * cfg80211_rx_mlme_mgmt - notification of processed MLME management frame
 * @dev: network device
 * @buf: authentication frame (header + body)
 * @len: length of the frame data
 *
 * This function is called whenever an authentication, disassociation or
 * deauthentication frame has been received and processed in station mode.
 * After being asked to authenticate via cfg80211_ops::auth() the driver must
 * call either this function or cfg80211_auth_timeout().
 * After being asked to associate via cfg80211_ops::assoc() the driver must
 * call either this function or cfg80211_auth_timeout().
 * While connected, the driver must calls this for received and processed
 * disassociation and deauthentication frames. If the frame couldn't be used
 * because it was unprotected, the driver must call the function
 * cfg80211_rx_unprot_mlme_mgmt() instead.
 *
 * This function may sleep. The caller must hold the corresponding wdev's mutex.
 */
void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len);

/**
 * cfg80211_auth_timeout - notification of timed out authentication
 * @dev: network device
 * @addr: The MAC address of the device with which the authentication timed out
 *
 * This function may sleep. The caller must hold the corresponding wdev's
 * mutex.
 */
void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr);

/**
 * struct cfg80211_rx_assoc_resp_data - association response data
 * @buf: (Re)Association Response frame (header + body)
 * @len: length of the frame data
 * @uapsd_queues: bitmap of queues configured for uapsd. Same format
 *	as the AC bitmap in the QoS info field
 * @req_ies: information elements from the (Re)Association Request frame
 * @req_ies_len: length of req_ies data
 * @ap_mld_addr: AP MLD address (in case of MLO)
 * @links: per-link information indexed by link ID, use links[0] for
 *	non-MLO connections
 * @links.bss: the BSS that association was requested with, ownership of the
 *      pointer moves to cfg80211 in the call to cfg80211_rx_assoc_resp()
 * @links.status: Set this (along with a BSS pointer) for links that
 *	were rejected by the AP.
 */
struct cfg80211_rx_assoc_resp_data {
	const u8 *buf;
	size_t len;
	const u8 *req_ies;
	size_t req_ies_len;
	int uapsd_queues;
	const u8 *ap_mld_addr;
	struct {
		u8 addr[ETH_ALEN] __aligned(2);
		struct cfg80211_bss *bss;
		u16 status;
	} links[IEEE80211_MLD_MAX_NUM_LINKS];
};

/**
 * cfg80211_rx_assoc_resp - notification of processed association response
 * @dev: network device
 * @data: association response data, &struct cfg80211_rx_assoc_resp_data
 *
 * After being asked to associate via cfg80211_ops::assoc() the driver must
 * call either this function or cfg80211_auth_timeout().
 *
 * This function may sleep. The caller must hold the corresponding wdev's mutex.
 */
void cfg80211_rx_assoc_resp(struct net_device *dev,
			    const struct cfg80211_rx_assoc_resp_data *data);

/**
 * struct cfg80211_assoc_failure - association failure data
 * @ap_mld_addr: AP MLD address, or %NULL
 * @bss: list of BSSes, must use entry 0 for non-MLO connections
 *	(@ap_mld_addr is %NULL)
 * @timeout: indicates the association failed due to timeout, otherwise
 *	the association was abandoned for a reason reported through some
 *	other API (e.g. deauth RX)
 */
struct cfg80211_assoc_failure {
	const u8 *ap_mld_addr;
	struct cfg80211_bss *bss[IEEE80211_MLD_MAX_NUM_LINKS];
	bool timeout;
};

/**
 * cfg80211_assoc_failure - notification of association failure
 * @dev: network device
 * @data: data describing the association failure
 *
 * This function may sleep. The caller must hold the corresponding wdev's mutex.
 */
void cfg80211_assoc_failure(struct net_device *dev,
			    struct cfg80211_assoc_failure *data);

/**
 * cfg80211_tx_mlme_mgmt - notification of transmitted deauth/disassoc frame
 * @dev: network device
 * @buf: 802.11 frame (header + body)
 * @len: length of the frame data
 * @reconnect: immediate reconnect is desired (include the nl80211 attribute)
 *
 * This function is called whenever deauthentication has been processed in
 * station mode. This includes both received deauthentication frames and
 * locally generated ones. This function may sleep. The caller must hold the
 * corresponding wdev's mutex.
 */
void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len,
			   bool reconnect);

/**
 * cfg80211_rx_unprot_mlme_mgmt - notification of unprotected mlme mgmt frame
 * @dev: network device
 * @buf: received management frame (header + body)
 * @len: length of the frame data
 *
 * This function is called whenever a received deauthentication or dissassoc
 * frame has been dropped in station mode because of MFP being used but the
 * frame was not protected. This is also used to notify reception of a Beacon
 * frame that was dropped because it did not include a valid MME MIC while
 * beacon protection was enabled (BIGTK configured in station mode).
 *
 * This function may sleep.
 */
void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev,
				  const u8 *buf, size_t len);

/**
 * cfg80211_michael_mic_failure - notification of Michael MIC failure (TKIP)
 * @dev: network device
 * @addr: The source MAC address of the frame
 * @key_type: The key type that the received frame used
 * @key_id: Key identifier (0..3). Can be -1 if missing.
 * @tsc: The TSC value of the frame that generated the MIC failure (6 octets)
 * @gfp: allocation flags
 *
 * This function is called whenever the local MAC detects a MIC failure in a
 * received frame. This matches with MLME-MICHAELMICFAILURE.indication()
 * primitive.
 */
void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
				  enum nl80211_key_type key_type, int key_id,
				  const u8 *tsc, gfp_t gfp);

/**
 * cfg80211_ibss_joined - notify cfg80211 that device joined an IBSS
 *
 * @dev: network device
 * @bssid: the BSSID of the IBSS joined
 * @channel: the channel of the IBSS joined
 * @gfp: allocation flags
 *
 * This function notifies cfg80211 that the device joined an IBSS or
 * switched to a different BSSID. Before this function can be called,
 * either a beacon has to have been received from the IBSS, or one of
 * the cfg80211_inform_bss{,_frame} functions must have been called
 * with the locally generated beacon -- this guarantees that there is
 * always a scan result for this IBSS. cfg80211 will handle the rest.
 */
void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
			  struct ieee80211_channel *channel, gfp_t gfp);

/**
 * cfg80211_notify_new_peer_candidate - notify cfg80211 of a new mesh peer
 * 					candidate
 *
 * @dev: network device
 * @macaddr: the MAC address of the new candidate
 * @ie: information elements advertised by the peer candidate
 * @ie_len: length of the information elements buffer
 * @sig_dbm: signal level in dBm
 * @gfp: allocation flags
 *
 * This function notifies cfg80211 that the mesh peer candidate has been
 * detected, most likely via a beacon or, less likely, via a probe response.
 * cfg80211 then sends a notification to userspace.
 */
void cfg80211_notify_new_peer_candidate(struct net_device *dev,
		const u8 *macaddr, const u8 *ie, u8 ie_len,
		int sig_dbm, gfp_t gfp);

/**
 * DOC: RFkill integration
 *
 * RFkill integration in cfg80211 is almost invisible to drivers,
 * as cfg80211 automatically registers an rfkill instance for each
 * wireless device it knows about. Soft kill is also translated
 * into disconnecting and turning all interfaces off. Drivers are
 * expected to turn off the device when all interfaces are down.
 *
 * However, devices may have a hard RFkill line, in which case they
 * also need to interact with the rfkill subsystem, via cfg80211.
 * They can do this with a few helper functions documented here.
 */

/**
 * wiphy_rfkill_set_hw_state_reason - notify cfg80211 about hw block state
 * @wiphy: the wiphy
 * @blocked: block status
 * @reason: one of reasons in &enum rfkill_hard_block_reasons
 */
void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked,
				      enum rfkill_hard_block_reasons reason);

static inline void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
{
	wiphy_rfkill_set_hw_state_reason(wiphy, blocked,
					 RFKILL_HARD_BLOCK_SIGNAL);
}

/**
 * wiphy_rfkill_start_polling - start polling rfkill
 * @wiphy: the wiphy
 */
void wiphy_rfkill_start_polling(struct wiphy *wiphy);

/**
 * wiphy_rfkill_stop_polling - stop polling rfkill
 * @wiphy: the wiphy
 */
static inline void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
{
	rfkill_pause_polling(wiphy->rfkill);
}

/**
 * DOC: Vendor commands
 *
 * Occasionally, there are special protocol or firmware features that
 * can't be implemented very openly. For this and similar cases, the
 * vendor command functionality allows implementing the features with
 * (typically closed-source) userspace and firmware, using nl80211 as
 * the configuration mechanism.
 *
 * A driver supporting vendor commands must register them as an array
 * in struct wiphy, with handlers for each one. Each command has an
 * OUI and sub command ID to identify it.
 *
 * Note that this feature should not be (ab)used to implement protocol
 * features that could openly be shared across drivers. In particular,
 * it must never be required to use vendor commands to implement any
 * "normal" functionality that higher-level userspace like connection
 * managers etc. need.
 */

struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
					   enum nl80211_commands cmd,
					   enum nl80211_attrs attr,
					   int approxlen);

struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
					   struct wireless_dev *wdev,
					   enum nl80211_commands cmd,
					   enum nl80211_attrs attr,
					   unsigned int portid,
					   int vendor_event_idx,
					   int approxlen, gfp_t gfp);

void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp);

/**
 * cfg80211_vendor_cmd_alloc_reply_skb - allocate vendor command reply
 * @wiphy: the wiphy
 * @approxlen: an upper bound of the length of the data that will
 *	be put into the skb
 *
 * This function allocates and pre-fills an skb for a reply to
 * a vendor command. Since it is intended for a reply, calling
 * it outside of a vendor command's doit() operation is invalid.
 *
 * The returned skb is pre-filled with some identifying data in
 * a way that any data that is put into the skb (with skb_put(),
 * nla_put() or similar) will end up being within the
 * %NL80211_ATTR_VENDOR_DATA attribute, so all that needs to be done
 * with the skb is adding data for the corresponding userspace tool
 * which can then read that data out of the vendor data attribute.
 * You must not modify the skb in any other way.
 *
 * When done, call cfg80211_vendor_cmd_reply() with the skb and return
 * its error code as the result of the doit() operation.
 *
 * Return: An allocated and pre-filled skb. %NULL if any errors happen.
 */
static inline struct sk_buff *
cfg80211_vendor_cmd_alloc_reply_skb(struct wiphy *wiphy, int approxlen)
{
	return __cfg80211_alloc_reply_skb(wiphy, NL80211_CMD_VENDOR,
					  NL80211_ATTR_VENDOR_DATA, approxlen);
}

/**
 * cfg80211_vendor_cmd_reply - send the reply skb
 * @skb: The skb, must have been allocated with
 *	cfg80211_vendor_cmd_alloc_reply_skb()
 *
 * Since calling this function will usually be the last thing
 * before returning from the vendor command doit() you should
 * return the error code.  Note that this function consumes the
 * skb regardless of the return value.
 *
 * Return: An error code or 0 on success.
 */
int cfg80211_vendor_cmd_reply(struct sk_buff *skb);

/**
 * cfg80211_vendor_cmd_get_sender - get the current sender netlink ID
 * @wiphy: the wiphy
 *
 * Return: the current netlink port ID in a vendor command handler.
 *
 * Context: May only be called from a vendor command handler
 */
unsigned int cfg80211_vendor_cmd_get_sender(struct wiphy *wiphy);

/**
 * cfg80211_vendor_event_alloc - allocate vendor-specific event skb
 * @wiphy: the wiphy
 * @wdev: the wireless device
 * @event_idx: index of the vendor event in the wiphy's vendor_events
 * @approxlen: an upper bound of the length of the data that will
 *	be put into the skb
 * @gfp: allocation flags
 *
 * This function allocates and pre-fills an skb for an event on the
 * vendor-specific multicast group.
 *
 * If wdev != NULL, both the ifindex and identifier of the specified
 * wireless device are added to the event message before the vendor data
 * attribute.
 *
 * When done filling the skb, call cfg80211_vendor_event() with the
 * skb to send the event.
 *
 * Return: An allocated and pre-filled skb. %NULL if any errors happen.
 */
static inline struct sk_buff *
cfg80211_vendor_event_alloc(struct wiphy *wiphy, struct wireless_dev *wdev,
			     int approxlen, int event_idx, gfp_t gfp)
{
	return __cfg80211_alloc_event_skb(wiphy, wdev, NL80211_CMD_VENDOR,
					  NL80211_ATTR_VENDOR_DATA,
					  0, event_idx, approxlen, gfp);
}

/**
 * cfg80211_vendor_event_alloc_ucast - alloc unicast vendor-specific event skb
 * @wiphy: the wiphy
 * @wdev: the wireless device
 * @event_idx: index of the vendor event in the wiphy's vendor_events
 * @portid: port ID of the receiver
 * @approxlen: an upper bound of the length of the data that will
 *	be put into the skb
 * @gfp: allocation flags
 *
 * This function allocates and pre-fills an skb for an event to send to
 * a specific (userland) socket. This socket would previously have been
 * obtained by cfg80211_vendor_cmd_get_sender(), and the caller MUST take
 * care to register a netlink notifier to see when the socket closes.
 *
 * If wdev != NULL, both the ifindex and identifier of the specified
 * wireless device are added to the event message before the vendor data
 * attribute.
 *
 * When done filling the skb, call cfg80211_vendor_event() with the
 * skb to send the event.
 *
 * Return: An allocated and pre-filled skb. %NULL if any errors happen.
 */
static inline struct sk_buff *
cfg80211_vendor_event_alloc_ucast(struct wiphy *wiphy,
				  struct wireless_dev *wdev,
				  unsigned int portid, int approxlen,
				  int event_idx, gfp_t gfp)
{
	return __cfg80211_alloc_event_skb(wiphy, wdev, NL80211_CMD_VENDOR,
					  NL80211_ATTR_VENDOR_DATA,
					  portid, event_idx, approxlen, gfp);
}

/**
 * cfg80211_vendor_event - send the event
 * @skb: The skb, must have been allocated with cfg80211_vendor_event_alloc()
 * @gfp: allocation flags
 *
 * This function sends the given @skb, which must have been allocated
 * by cfg80211_vendor_event_alloc(), as an event. It always consumes it.
 */
static inline void cfg80211_vendor_event(struct sk_buff *skb, gfp_t gfp)
{
	__cfg80211_send_event_skb(skb, gfp);
}

#ifdef CONFIG_NL80211_TESTMODE
/**
 * DOC: Test mode
 *
 * Test mode is a set of utility functions to allow drivers to
 * interact with driver-specific tools to aid, for instance,
 * factory programming.
 *
 * This chapter describes how drivers interact with it. For more
 * information see the nl80211 book's chapter on it.
 */

/**
 * cfg80211_testmode_alloc_reply_skb - allocate testmode reply
 * @wiphy: the wiphy
 * @approxlen: an upper bound of the length of the data that will
 *	be put into the skb
 *
 * This function allocates and pre-fills an skb for a reply to
 * the testmode command. Since it is intended for a reply, calling
 * it outside of the @testmode_cmd operation is invalid.
 *
 * The returned skb is pre-filled with the wiphy index and set up in
 * a way that any data that is put into the skb (with skb_put(),
 * nla_put() or similar) will end up being within the
 * %NL80211_ATTR_TESTDATA attribute, so all that needs to be done
 * with the skb is adding data for the corresponding userspace tool
 * which can then read that data out of the testdata attribute. You
 * must not modify the skb in any other way.
 *
 * When done, call cfg80211_testmode_reply() with the skb and return
 * its error code as the result of the @testmode_cmd operation.
 *
 * Return: An allocated and pre-filled skb. %NULL if any errors happen.
 */
static inline struct sk_buff *
cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy, int approxlen)
{
	return __cfg80211_alloc_reply_skb(wiphy, NL80211_CMD_TESTMODE,
					  NL80211_ATTR_TESTDATA, approxlen);
}

/**
 * cfg80211_testmode_reply - send the reply skb
 * @skb: The skb, must have been allocated with
 *	cfg80211_testmode_alloc_reply_skb()
 *
 * Since calling this function will usually be the last thing
 * before returning from the @testmode_cmd you should return
 * the error code.  Note that this function consumes the skb
 * regardless of the return value.
 *
 * Return: An error code or 0 on success.
 */
static inline int cfg80211_testmode_reply(struct sk_buff *skb)
{
	return cfg80211_vendor_cmd_reply(skb);
}

/**
 * cfg80211_testmode_alloc_event_skb - allocate testmode event
 * @wiphy: the wiphy
 * @approxlen: an upper bound of the length of the data that will
 *	be put into the skb
 * @gfp: allocation flags
 *
 * This function allocates and pre-fills an skb for an event on the
 * testmode multicast group.
 *
 * The returned skb is set up in the same way as with
 * cfg80211_testmode_alloc_reply_skb() but prepared for an event. As
 * there, you should simply add data to it that will then end up in the
 * %NL80211_ATTR_TESTDATA attribute. Again, you must not modify the skb
 * in any other way.
 *
 * When done filling the skb, call cfg80211_testmode_event() with the
 * skb to send the event.
 *
 * Return: An allocated and pre-filled skb. %NULL if any errors happen.
 */
static inline struct sk_buff *
cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy, int approxlen, gfp_t gfp)
{
	return __cfg80211_alloc_event_skb(wiphy, NULL, NL80211_CMD_TESTMODE,
					  NL80211_ATTR_TESTDATA, 0, -1,
					  approxlen, gfp);
}

/**
 * cfg80211_testmode_event - send the event
 * @skb: The skb, must have been allocated with
 *	cfg80211_testmode_alloc_event_skb()
 * @gfp: allocation flags
 *
 * This function sends the given @skb, which must have been allocated
 * by cfg80211_testmode_alloc_event_skb(), as an event. It always
 * consumes it.
 */
static inline void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
{
	__cfg80211_send_event_skb(skb, gfp);
}

#define CFG80211_TESTMODE_CMD(cmd)	.testmode_cmd = (cmd),
#define CFG80211_TESTMODE_DUMP(cmd)	.testmode_dump = (cmd),
#else
#define CFG80211_TESTMODE_CMD(cmd)
#define CFG80211_TESTMODE_DUMP(cmd)
#endif

/**
 * struct cfg80211_fils_resp_params - FILS connection response params
 * @kek: KEK derived from a successful FILS connection (may be %NULL)
 * @kek_len: Length of @fils_kek in octets
 * @update_erp_next_seq_num: Boolean value to specify whether the value in
 *	@erp_next_seq_num is valid.
 * @erp_next_seq_num: The next sequence number to use in ERP message in
 *	FILS Authentication. This value should be specified irrespective of the
 *	status for a FILS connection.
 * @pmk: A new PMK if derived from a successful FILS connection (may be %NULL).
 * @pmk_len: Length of @pmk in octets
 * @pmkid: A new PMKID if derived from a successful FILS connection or the PMKID
 *	used for this FILS connection (may be %NULL).
 */
struct cfg80211_fils_resp_params {
	const u8 *kek;
	size_t kek_len;
	bool update_erp_next_seq_num;
	u16 erp_next_seq_num;
	const u8 *pmk;
	size_t pmk_len;
	const u8 *pmkid;
};

/**
 * struct cfg80211_connect_resp_params - Connection response params
 * @status: Status code, %WLAN_STATUS_SUCCESS for successful connection, use
 *	%WLAN_STATUS_UNSPECIFIED_FAILURE if your device cannot give you
 *	the real status code for failures. If this call is used to report a
 *	failure due to a timeout (e.g., not receiving an Authentication frame
 *	from the AP) instead of an explicit rejection by the AP, -1 is used to
 *	indicate that this is a failure, but without a status code.
 *	@timeout_reason is used to report the reason for the timeout in that
 *	case.
 * @req_ie: Association request IEs (may be %NULL)
 * @req_ie_len: Association request IEs length
 * @resp_ie: Association response IEs (may be %NULL)
 * @resp_ie_len: Association response IEs length
 * @fils: FILS connection response parameters.
 * @timeout_reason: Reason for connection timeout. This is used when the
 *	connection fails due to a timeout instead of an explicit rejection from
 *	the AP. %NL80211_TIMEOUT_UNSPECIFIED is used when the timeout reason is
 *	not known. This value is used only if @status < 0 to indicate that the
 *	failure is due to a timeout and not due to explicit rejection by the AP.
 *	This value is ignored in other cases (@status >= 0).
 * @valid_links: For MLO connection, BIT mask of the valid link ids. Otherwise
 *	zero.
 * @ap_mld_addr: For MLO connection, MLD address of the AP. Otherwise %NULL.
 * @links : For MLO connection, contains link info for the valid links indicated
 *	using @valid_links. For non-MLO connection, links[0] contains the
 *	connected AP info.
 * @links.addr: For MLO connection, MAC address of the STA link. Otherwise
 *	%NULL.
 * @links.bssid: For MLO connection, MAC address of the AP link. For non-MLO
 *	connection, links[0].bssid points to the BSSID of the AP (may be %NULL).
 * @links.bss: For MLO connection, entry of bss to which STA link is connected.
 *	For non-MLO connection, links[0].bss points to entry of bss to which STA
 *	is connected. It can be obtained through cfg80211_get_bss() (may be
 *	%NULL). It is recommended to store the bss from the connect_request and
 *	hold a reference to it and return through this param to avoid a warning
 *	if the bss is expired during the connection, esp. for those drivers
 *	implementing connect op. Only one parameter among @bssid and @bss needs
 *	to be specified.
 * @links.status: per-link status code, to report a status code that's not
 *	%WLAN_STATUS_SUCCESS for a given link, it must also be in the
 *	@valid_links bitmap and may have a BSS pointer (which is then released)
 */
struct cfg80211_connect_resp_params {
	int status;
	const u8 *req_ie;
	size_t req_ie_len;
	const u8 *resp_ie;
	size_t resp_ie_len;
	struct cfg80211_fils_resp_params fils;
	enum nl80211_timeout_reason timeout_reason;

	const u8 *ap_mld_addr;
	u16 valid_links;
	struct {
		const u8 *addr;
		const u8 *bssid;
		struct cfg80211_bss *bss;
		u16 status;
	} links[IEEE80211_MLD_MAX_NUM_LINKS];
};

/**
 * cfg80211_connect_done - notify cfg80211 of connection result
 *
 * @dev: network device
 * @params: connection response parameters
 * @gfp: allocation flags
 *
 * It should be called by the underlying driver once execution of the connection
 * request from connect() has been completed. This is similar to
 * cfg80211_connect_bss(), but takes a structure pointer for connection response
 * parameters. Only one of the functions among cfg80211_connect_bss(),
 * cfg80211_connect_result(), cfg80211_connect_timeout(),
 * and cfg80211_connect_done() should be called.
 */
void cfg80211_connect_done(struct net_device *dev,
			   struct cfg80211_connect_resp_params *params,
			   gfp_t gfp);

/**
 * cfg80211_connect_bss - notify cfg80211 of connection result
 *
 * @dev: network device
 * @bssid: the BSSID of the AP
 * @bss: Entry of bss to which STA got connected to, can be obtained through
 *	cfg80211_get_bss() (may be %NULL). But it is recommended to store the
 *	bss from the connect_request and hold a reference to it and return
 *	through this param to avoid a warning if the bss is expired during the
 *	connection, esp. for those drivers implementing connect op.
 *	Only one parameter among @bssid and @bss needs to be specified.
 * @req_ie: association request IEs (maybe be %NULL)
 * @req_ie_len: association request IEs length
 * @resp_ie: association response IEs (may be %NULL)
 * @resp_ie_len: assoc response IEs length
 * @status: status code, %WLAN_STATUS_SUCCESS for successful connection, use
 *	%WLAN_STATUS_UNSPECIFIED_FAILURE if your device cannot give you
 *	the real status code for failures. If this call is used to report a
 *	failure due to a timeout (e.g., not receiving an Authentication frame
 *	from the AP) instead of an explicit rejection by the AP, -1 is used to
 *	indicate that this is a failure, but without a status code.
 *	@timeout_reason is used to report the reason for the timeout in that
 *	case.
 * @gfp: allocation flags
 * @timeout_reason: reason for connection timeout. This is used when the
 *	connection fails due to a timeout instead of an explicit rejection from
 *	the AP. %NL80211_TIMEOUT_UNSPECIFIED is used when the timeout reason is
 *	not known. This value is used only if @status < 0 to indicate that the
 *	failure is due to a timeout and not due to explicit rejection by the AP.
 *	This value is ignored in other cases (@status >= 0).
 *
 * It should be called by the underlying driver once execution of the connection
 * request from connect() has been completed. This is similar to
 * cfg80211_connect_result(), but with the option of identifying the exact bss
 * entry for the connection. Only one of the functions among
 * cfg80211_connect_bss(), cfg80211_connect_result(),
 * cfg80211_connect_timeout(), and cfg80211_connect_done() should be called.
 */
static inline void
cfg80211_connect_bss(struct net_device *dev, const u8 *bssid,
		     struct cfg80211_bss *bss, const u8 *req_ie,
		     size_t req_ie_len, const u8 *resp_ie,
		     size_t resp_ie_len, int status, gfp_t gfp,
		     enum nl80211_timeout_reason timeout_reason)
{
	struct cfg80211_connect_resp_params params;

	memset(&params, 0, sizeof(params));
	params.status = status;
	params.links[0].bssid = bssid;
	params.links[0].bss = bss;
	params.req_ie = req_ie;
	params.req_ie_len = req_ie_len;
	params.resp_ie = resp_ie;
	params.resp_ie_len = resp_ie_len;
	params.timeout_reason = timeout_reason;

	cfg80211_connect_done(dev, &params, gfp);
}

/**
 * cfg80211_connect_result - notify cfg80211 of connection result
 *
 * @dev: network device
 * @bssid: the BSSID of the AP
 * @req_ie: association request IEs (maybe be %NULL)
 * @req_ie_len: association request IEs length
 * @resp_ie: association response IEs (may be %NULL)
 * @resp_ie_len: assoc response IEs length
 * @status: status code, %WLAN_STATUS_SUCCESS for successful connection, use
 *	%WLAN_STATUS_UNSPECIFIED_FAILURE if your device cannot give you
 *	the real status code for failures.
 * @gfp: allocation flags
 *
 * It should be called by the underlying driver once execution of the connection
 * request from connect() has been completed. This is similar to
 * cfg80211_connect_bss() which allows the exact bss entry to be specified. Only
 * one of the functions among cfg80211_connect_bss(), cfg80211_connect_result(),
 * cfg80211_connect_timeout(), and cfg80211_connect_done() should be called.
 */
static inline void
cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
			const u8 *req_ie, size_t req_ie_len,
			const u8 *resp_ie, size_t resp_ie_len,
			u16 status, gfp_t gfp)
{
	cfg80211_connect_bss(dev, bssid, NULL, req_ie, req_ie_len, resp_ie,
			     resp_ie_len, status, gfp,
			     NL80211_TIMEOUT_UNSPECIFIED);
}

/**
 * cfg80211_connect_timeout - notify cfg80211 of connection timeout
 *
 * @dev: network device
 * @bssid: the BSSID of the AP
 * @req_ie: association request IEs (maybe be %NULL)
 * @req_ie_len: association request IEs length
 * @gfp: allocation flags
 * @timeout_reason: reason for connection timeout.
 *
 * It should be called by the underlying driver whenever connect() has failed
 * in a sequence where no explicit authentication/association rejection was
 * received from the AP. This could happen, e.g., due to not being able to send
 * out the Authentication or Association Request frame or timing out while
 * waiting for the response. Only one of the functions among
 * cfg80211_connect_bss(), cfg80211_connect_result(),
 * cfg80211_connect_timeout(), and cfg80211_connect_done() should be called.
 */
static inline void
cfg80211_connect_timeout(struct net_device *dev, const u8 *bssid,
			 const u8 *req_ie, size_t req_ie_len, gfp_t gfp,
			 enum nl80211_timeout_reason timeout_reason)
{
	cfg80211_connect_bss(dev, bssid, NULL, req_ie, req_ie_len, NULL, 0, -1,
			     gfp, timeout_reason);
}

/**
 * struct cfg80211_roam_info - driver initiated roaming information
 *
 * @req_ie: association request IEs (maybe be %NULL)
 * @req_ie_len: association request IEs length
 * @resp_ie: association response IEs (may be %NULL)
 * @resp_ie_len: assoc response IEs length
 * @fils: FILS related roaming information.
 * @valid_links: For MLO roaming, BIT mask of the new valid links is set.
 *	Otherwise zero.
 * @ap_mld_addr: For MLO roaming, MLD address of the new AP. Otherwise %NULL.
 * @links : For MLO roaming, contains new link info for the valid links set in
 *	@valid_links. For non-MLO roaming, links[0] contains the new AP info.
 * @links.addr: For MLO roaming, MAC address of the STA link. Otherwise %NULL.
 * @links.bssid: For MLO roaming, MAC address of the new AP link. For non-MLO
 *	roaming, links[0].bssid points to the BSSID of the new AP. May be
 *	%NULL if %links.bss is set.
 * @links.channel: the channel of the new AP.
 * @links.bss: For MLO roaming, entry of new bss to which STA link got
 *	roamed. For non-MLO roaming, links[0].bss points to entry of bss to
 *	which STA got roamed (may be %NULL if %links.bssid is set)
 */
struct cfg80211_roam_info {
	const u8 *req_ie;
	size_t req_ie_len;
	const u8 *resp_ie;
	size_t resp_ie_len;
	struct cfg80211_fils_resp_params fils;

	const u8 *ap_mld_addr;
	u16 valid_links;
	struct {
		const u8 *addr;
		const u8 *bssid;
		struct ieee80211_channel *channel;
		struct cfg80211_bss *bss;
	} links[IEEE80211_MLD_MAX_NUM_LINKS];
};

/**
 * cfg80211_roamed - notify cfg80211 of roaming
 *
 * @dev: network device
 * @info: information about the new BSS. struct &cfg80211_roam_info.
 * @gfp: allocation flags
 *
 * This function may be called with the driver passing either the BSSID of the
 * new AP or passing the bss entry to avoid a race in timeout of the bss entry.
 * It should be called by the underlying driver whenever it roamed from one AP
 * to another while connected. Drivers which have roaming implemented in
 * firmware should pass the bss entry to avoid a race in bss entry timeout where
 * the bss entry of the new AP is seen in the driver, but gets timed out by the
 * time it is accessed in __cfg80211_roamed() due to delay in scheduling
 * rdev->event_work. In case of any failures, the reference is released
 * either in cfg80211_roamed() or in __cfg80211_romed(), Otherwise, it will be
 * released while disconnecting from the current bss.
 */
void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info,
		     gfp_t gfp);

/**
 * cfg80211_port_authorized - notify cfg80211 of successful security association
 *
 * @dev: network device
 * @peer_addr: BSSID of the AP/P2P GO in case of STA/GC or STA/GC MAC address
 *	in case of AP/P2P GO
 * @td_bitmap: transition disable policy
 * @td_bitmap_len: Length of transition disable policy
 * @gfp: allocation flags
 *
 * This function should be called by a driver that supports 4 way handshake
 * offload after a security association was successfully established (i.e.,
 * the 4 way handshake was completed successfully). The call to this function
 * should be preceded with a call to cfg80211_connect_result(),
 * cfg80211_connect_done(), cfg80211_connect_bss() or cfg80211_roamed() to
 * indicate the 802.11 association.
 * This function can also be called by AP/P2P GO driver that supports
 * authentication offload. In this case the peer_mac passed is that of
 * associated STA/GC.
 */
void cfg80211_port_authorized(struct net_device *dev, const u8 *peer_addr,
			      const u8* td_bitmap, u8 td_bitmap_len, gfp_t gfp);

/**
 * cfg80211_disconnected - notify cfg80211 that connection was dropped
 *
 * @dev: network device
 * @ie: information elements of the deauth/disassoc frame (may be %NULL)
 * @ie_len: length of IEs
 * @reason: reason code for the disconnection, set it to 0 if unknown
 * @locally_generated: disconnection was requested locally
 * @gfp: allocation flags
 *
 * After it calls this function, the driver should enter an idle state
 * and not try to connect to any AP any more.
 */
void cfg80211_disconnected(struct net_device *dev, u16 reason,
			   const u8 *ie, size_t ie_len,
			   bool locally_generated, gfp_t gfp);

/**
 * cfg80211_ready_on_channel - notification of remain_on_channel start
 * @wdev: wireless device
 * @cookie: the request cookie
 * @chan: The current channel (from remain_on_channel request)
 * @duration: Duration in milliseconds that the driver intents to remain on the
 *	channel
 * @gfp: allocation flags
 */
void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
			       struct ieee80211_channel *chan,
			       unsigned int duration, gfp_t gfp);

/**
 * cfg80211_remain_on_channel_expired - remain_on_channel duration expired
 * @wdev: wireless device
 * @cookie: the request cookie
 * @chan: The current channel (from remain_on_channel request)
 * @gfp: allocation flags
 */
void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
					struct ieee80211_channel *chan,
					gfp_t gfp);

/**
 * cfg80211_tx_mgmt_expired - tx_mgmt duration expired
 * @wdev: wireless device
 * @cookie: the requested cookie
 * @chan: The current channel (from tx_mgmt request)
 * @gfp: allocation flags
 */
void cfg80211_tx_mgmt_expired(struct wireless_dev *wdev, u64 cookie,
			      struct ieee80211_channel *chan, gfp_t gfp);

/**
 * cfg80211_sinfo_alloc_tid_stats - allocate per-tid statistics.
 *
 * @sinfo: the station information
 * @gfp: allocation flags
 *
 * Return: 0 on success. Non-zero on error.
 */
int cfg80211_sinfo_alloc_tid_stats(struct station_info *sinfo, gfp_t gfp);

/**
 * cfg80211_link_sinfo_alloc_tid_stats - allocate per-tid statistics.
 *
 * @link_sinfo: the link station information
 * @gfp: allocation flags
 *
 * Return: 0 on success. Non-zero on error.
 */
int cfg80211_link_sinfo_alloc_tid_stats(struct link_station_info *link_sinfo,
					gfp_t gfp);

/**
 * cfg80211_sinfo_release_content - release contents of station info
 * @sinfo: the station information
 *
 * Releases any potentially allocated sub-information of the station
 * information, but not the struct itself (since it's typically on
 * the stack.)
 */
static inline void cfg80211_sinfo_release_content(struct station_info *sinfo)
{
	kfree(sinfo->pertid);

	for (int link_id = 0; link_id < ARRAY_SIZE(sinfo->links); link_id++) {
		if (sinfo->links[link_id]) {
			kfree(sinfo->links[link_id]->pertid);
			kfree(sinfo->links[link_id]);
		}
	}
}

/**
 * cfg80211_new_sta - notify userspace about station
 *
 * @dev: the netdev
 * @mac_addr: the station's address
 * @sinfo: the station information
 * @gfp: allocation flags
 */
void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
		      struct station_info *sinfo, gfp_t gfp);

/**
 * cfg80211_del_sta_sinfo - notify userspace about deletion of a station
 * @dev: the netdev
 * @mac_addr: the station's address. For MLD station, MLD address is used.
 * @sinfo: the station information/statistics
 * @gfp: allocation flags
 */
void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
			    struct station_info *sinfo, gfp_t gfp);

/**
 * cfg80211_del_sta - notify userspace about deletion of a station
 *
 * @dev: the netdev
 * @mac_addr: the station's address. For MLD station, MLD address is used.
 * @gfp: allocation flags
 */
static inline void cfg80211_del_sta(struct net_device *dev,
				    const u8 *mac_addr, gfp_t gfp)
{
	cfg80211_del_sta_sinfo(dev, mac_addr, NULL, gfp);
}

/**
 * cfg80211_conn_failed - connection request failed notification
 *
 * @dev: the netdev
 * @mac_addr: the station's address
 * @reason: the reason for connection failure
 * @gfp: allocation flags
 *
 * Whenever a station tries to connect to an AP and if the station
 * could not connect to the AP as the AP has rejected the connection
 * for some reasons, this function is called.
 *
 * The reason for connection failure can be any of the value from
 * nl80211_connect_failed_reason enum
 */
void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
			  enum nl80211_connect_failed_reason reason,
			  gfp_t gfp);

/**
 * struct cfg80211_rx_info - received management frame info
 *
 * @freq: Frequency on which the frame was received in kHz
 * @sig_dbm: signal strength in dBm, or 0 if unknown
 * @have_link_id: indicates the frame was received on a link of
 *	an MLD, i.e. the @link_id field is valid
 * @link_id: the ID of the link the frame was received	on
 * @buf: Management frame (header + body)
 * @len: length of the frame data
 * @flags: flags, as defined in &enum nl80211_rxmgmt_flags
 * @rx_tstamp: Hardware timestamp of frame RX in nanoseconds
 * @ack_tstamp: Hardware timestamp of ack TX in nanoseconds
 */
struct cfg80211_rx_info {
	int freq;
	int sig_dbm;
	bool have_link_id;
	u8 link_id;
	const u8 *buf;
	size_t len;
	u32 flags;
	u64 rx_tstamp;
	u64 ack_tstamp;
};

/**
 * cfg80211_rx_mgmt_ext - management frame notification with extended info
 * @wdev: wireless device receiving the frame
 * @info: RX info as defined in struct cfg80211_rx_info
 *
 * This function is called whenever an Action frame is received for a station
 * mode interface, but is not processed in kernel.
 *
 * Return: %true if a user space application has registered for this frame.
 * For action frames, that makes it responsible for rejecting unrecognized
 * action frames; %false otherwise, in which case for action frames the
 * driver is responsible for rejecting the frame.
 */
bool cfg80211_rx_mgmt_ext(struct wireless_dev *wdev,
			  struct cfg80211_rx_info *info);

/**
 * cfg80211_rx_mgmt_khz - notification of received, unprocessed management frame
 * @wdev: wireless device receiving the frame
 * @freq: Frequency on which the frame was received in KHz
 * @sig_dbm: signal strength in dBm, or 0 if unknown
 * @buf: Management frame (header + body)
 * @len: length of the frame data
 * @flags: flags, as defined in enum nl80211_rxmgmt_flags
 *
 * This function is called whenever an Action frame is received for a station
 * mode interface, but is not processed in kernel.
 *
 * Return: %true if a user space application has registered for this frame.
 * For action frames, that makes it responsible for rejecting unrecognized
 * action frames; %false otherwise, in which case for action frames the
 * driver is responsible for rejecting the frame.
 */
static inline bool cfg80211_rx_mgmt_khz(struct wireless_dev *wdev, int freq,
					int sig_dbm, const u8 *buf, size_t len,
					u32 flags)
{
	struct cfg80211_rx_info info = {
		.freq = freq,
		.sig_dbm = sig_dbm,
		.buf = buf,
		.len = len,
		.flags = flags
	};

	return cfg80211_rx_mgmt_ext(wdev, &info);
}

/**
 * cfg80211_rx_mgmt - notification of received, unprocessed management frame
 * @wdev: wireless device receiving the frame
 * @freq: Frequency on which the frame was received in MHz
 * @sig_dbm: signal strength in dBm, or 0 if unknown
 * @buf: Management frame (header + body)
 * @len: length of the frame data
 * @flags: flags, as defined in enum nl80211_rxmgmt_flags
 *
 * This function is called whenever an Action frame is received for a station
 * mode interface, but is not processed in kernel.
 *
 * Return: %true if a user space application has registered for this frame.
 * For action frames, that makes it responsible for rejecting unrecognized
 * action frames; %false otherwise, in which case for action frames the
 * driver is responsible for rejecting the frame.
 */
static inline bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq,
				    int sig_dbm, const u8 *buf, size_t len,
				    u32 flags)
{
	struct cfg80211_rx_info info = {
		.freq = MHZ_TO_KHZ(freq),
		.sig_dbm = sig_dbm,
		.buf = buf,
		.len = len,
		.flags = flags
	};

	return cfg80211_rx_mgmt_ext(wdev, &info);
}

/**
 * struct cfg80211_tx_status - TX status for management frame information
 *
 * @cookie: Cookie returned by cfg80211_ops::mgmt_tx()
 * @tx_tstamp: hardware TX timestamp in nanoseconds
 * @ack_tstamp: hardware ack RX timestamp in nanoseconds
 * @buf: Management frame (header + body)
 * @len: length of the frame data
 * @ack: Whether frame was acknowledged
 */
struct cfg80211_tx_status {
	u64 cookie;
	u64 tx_tstamp;
	u64 ack_tstamp;
	const u8 *buf;
	size_t len;
	bool ack;
};

/**
 * cfg80211_mgmt_tx_status_ext - TX status notification with extended info
 * @wdev: wireless device receiving the frame
 * @status: TX status data
 * @gfp: context flags
 *
 * This function is called whenever a management frame was requested to be
 * transmitted with cfg80211_ops::mgmt_tx() to report the TX status of the
 * transmission attempt with extended info.
 */
void cfg80211_mgmt_tx_status_ext(struct wireless_dev *wdev,
				 struct cfg80211_tx_status *status, gfp_t gfp);

/**
 * cfg80211_mgmt_tx_status - notification of TX status for management frame
 * @wdev: wireless device receiving the frame
 * @cookie: Cookie returned by cfg80211_ops::mgmt_tx()
 * @buf: Management frame (header + body)
 * @len: length of the frame data
 * @ack: Whether frame was acknowledged
 * @gfp: context flags
 *
 * This function is called whenever a management frame was requested to be
 * transmitted with cfg80211_ops::mgmt_tx() to report the TX status of the
 * transmission attempt.
 */
static inline void cfg80211_mgmt_tx_status(struct wireless_dev *wdev,
					   u64 cookie, const u8 *buf,
					   size_t len, bool ack, gfp_t gfp)
{
	struct cfg80211_tx_status status = {
		.cookie = cookie,
		.buf = buf,
		.len = len,
		.ack = ack
	};

	cfg80211_mgmt_tx_status_ext(wdev, &status, gfp);
}

/**
 * cfg80211_control_port_tx_status - notification of TX status for control
 *                                   port frames
 * @wdev: wireless device receiving the frame
 * @cookie: Cookie returned by cfg80211_ops::tx_control_port()
 * @buf: Data frame (header + body)
 * @len: length of the frame data
 * @ack: Whether frame was acknowledged
 * @gfp: context flags
 *
 * This function is called whenever a control port frame was requested to be
 * transmitted with cfg80211_ops::tx_control_port() to report the TX status of
 * the transmission attempt.
 */
void cfg80211_control_port_tx_status(struct wireless_dev *wdev, u64 cookie,
				     const u8 *buf, size_t len, bool ack,
				     gfp_t gfp);

/**
 * cfg80211_rx_control_port - notification about a received control port frame
 * @dev: The device the frame matched to
 * @skb: The skbuf with the control port frame.  It is assumed that the skbuf
 *	is 802.3 formatted (with 802.3 header).  The skb can be non-linear.
 *	This function does not take ownership of the skb, so the caller is
 *	responsible for any cleanup.  The caller must also ensure that
 *	skb->protocol is set appropriately.
 * @unencrypted: Whether the frame was received unencrypted
 * @link_id: the link the frame was received on, -1 if not applicable or unknown
 *
 * This function is used to inform userspace about a received control port
 * frame.  It should only be used if userspace indicated it wants to receive
 * control port frames over nl80211.
 *
 * The frame is the data portion of the 802.3 or 802.11 data frame with all
 * network layer headers removed (e.g. the raw EAPoL frame).
 *
 * Return: %true if the frame was passed to userspace
 */
bool cfg80211_rx_control_port(struct net_device *dev, struct sk_buff *skb,
			      bool unencrypted, int link_id);

/**
 * cfg80211_cqm_rssi_notify - connection quality monitoring rssi event
 * @dev: network device
 * @rssi_event: the triggered RSSI event
 * @rssi_level: new RSSI level value or 0 if not available
 * @gfp: context flags
 *
 * This function is called when a configured connection quality monitoring
 * rssi threshold reached event occurs.
 */
void cfg80211_cqm_rssi_notify(struct net_device *dev,
			      enum nl80211_cqm_rssi_threshold_event rssi_event,
			      s32 rssi_level, gfp_t gfp);

/**
 * cfg80211_cqm_pktloss_notify - notify userspace about packetloss to peer
 * @dev: network device
 * @peer: peer's MAC address
 * @num_packets: how many packets were lost -- should be a fixed threshold
 *	but probably no less than maybe 50, or maybe a throughput dependent
 *	threshold (to account for temporary interference)
 * @gfp: context flags
 */
void cfg80211_cqm_pktloss_notify(struct net_device *dev,
				 const u8 *peer, u32 num_packets, gfp_t gfp);

/**
 * cfg80211_cqm_txe_notify - TX error rate event
 * @dev: network device
 * @peer: peer's MAC address
 * @num_packets: how many packets were lost
 * @rate: % of packets which failed transmission
 * @intvl: interval (in s) over which the TX failure threshold was breached.
 * @gfp: context flags
 *
 * Notify userspace when configured % TX failures over number of packets in a
 * given interval is exceeded.
 */
void cfg80211_cqm_txe_notify(struct net_device *dev, const u8 *peer,
			     u32 num_packets, u32 rate, u32 intvl, gfp_t gfp);

/**
 * cfg80211_cqm_beacon_loss_notify - beacon loss event
 * @dev: network device
 * @gfp: context flags
 *
 * Notify userspace about beacon loss from the connected AP.
 */
void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp);

/**
 * __cfg80211_radar_event - radar detection event
 * @wiphy: the wiphy
 * @chandef: chandef for the current channel
 * @offchan: the radar has been detected on the offchannel chain
 * @gfp: context flags
 *
 * This function is called when a radar is detected on the current chanenl.
 */
void __cfg80211_radar_event(struct wiphy *wiphy,
			    struct cfg80211_chan_def *chandef,
			    bool offchan, gfp_t gfp);

static inline void
cfg80211_radar_event(struct wiphy *wiphy,
		     struct cfg80211_chan_def *chandef,
		     gfp_t gfp)
{
	__cfg80211_radar_event(wiphy, chandef, false, gfp);
}

static inline void
cfg80211_background_radar_event(struct wiphy *wiphy,
				struct cfg80211_chan_def *chandef,
				gfp_t gfp)
{
	__cfg80211_radar_event(wiphy, chandef, true, gfp);
}

/**
 * cfg80211_sta_opmode_change_notify - STA's ht/vht operation mode change event
 * @dev: network device
 * @mac: MAC address of a station which opmode got modified
 * @sta_opmode: station's current opmode value
 * @gfp: context flags
 *
 * Driver should call this function when station's opmode modified via action
 * frame.
 */
void cfg80211_sta_opmode_change_notify(struct net_device *dev, const u8 *mac,
				       struct sta_opmode_info *sta_opmode,
				       gfp_t gfp);

/**
 * cfg80211_cac_event - Channel availability check (CAC) event
 * @netdev: network device
 * @chandef: chandef for the current channel
 * @event: type of event
 * @gfp: context flags
 * @link_id: valid link_id for MLO operation or 0 otherwise.
 *
 * This function is called when a Channel availability check (CAC) is finished
 * or aborted. This must be called to notify the completion of a CAC process,
 * also by full-MAC drivers.
 */
void cfg80211_cac_event(struct net_device *netdev,
			const struct cfg80211_chan_def *chandef,
			enum nl80211_radar_event event, gfp_t gfp,
			unsigned int link_id);

/**
 * cfg80211_background_cac_abort - Channel Availability Check offchan abort event
 * @wiphy: the wiphy
 *
 * This function is called by the driver when a Channel Availability Check
 * (CAC) is aborted by a offchannel dedicated chain.
 */
void cfg80211_background_cac_abort(struct wiphy *wiphy);

/**
 * cfg80211_gtk_rekey_notify - notify userspace about driver rekeying
 * @dev: network device
 * @bssid: BSSID of AP (to avoid races)
 * @replay_ctr: new replay counter
 * @gfp: allocation flags
 */
void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
			       const u8 *replay_ctr, gfp_t gfp);

/**
 * cfg80211_pmksa_candidate_notify - notify about PMKSA caching candidate
 * @dev: network device
 * @index: candidate index (the smaller the index, the higher the priority)
 * @bssid: BSSID of AP
 * @preauth: Whether AP advertises support for RSN pre-authentication
 * @gfp: allocation flags
 */
void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
				     const u8 *bssid, bool preauth, gfp_t gfp);

/**
 * cfg80211_rx_spurious_frame - inform userspace about a spurious frame
 * @dev: The device the frame matched to
 * @link_id: the link the frame was received on, -1 if not applicable or unknown
 * @addr: the transmitter address
 * @gfp: context flags
 *
 * This function is used in AP mode (only!) to inform userspace that
 * a spurious class 3 frame was received, to be able to deauth the
 * sender.
 * Return: %true if the frame was passed to userspace (or this failed
 * for a reason other than not having a subscription.)
 */
bool cfg80211_rx_spurious_frame(struct net_device *dev, const u8 *addr,
				int link_id, gfp_t gfp);

/**
 * cfg80211_rx_unexpected_4addr_frame - inform about unexpected WDS frame
 * @dev: The device the frame matched to
 * @addr: the transmitter address
 * @link_id: the link the frame was received on, -1 if not applicable or unknown
 * @gfp: context flags
 *
 * This function is used in AP mode (only!) to inform userspace that
 * an associated station sent a 4addr frame but that wasn't expected.
 * It is allowed and desirable to send this event only once for each
 * station to avoid event flooding.
 * Return: %true if the frame was passed to userspace (or this failed
 * for a reason other than not having a subscription.)
 */
bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev, const u8 *addr,
					int link_id, gfp_t gfp);

/**
 * cfg80211_probe_status - notify userspace about probe status
 * @dev: the device the probe was sent on
 * @addr: the address of the peer
 * @cookie: the cookie filled in @probe_client previously
 * @acked: indicates whether probe was acked or not
 * @ack_signal: signal strength (in dBm) of the ACK frame.
 * @is_valid_ack_signal: indicates the ack_signal is valid or not.
 * @gfp: allocation flags
 */
void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
			   u64 cookie, bool acked, s32 ack_signal,
			   bool is_valid_ack_signal, gfp_t gfp);

/**
 * cfg80211_report_obss_beacon_khz - report beacon from other APs
 * @wiphy: The wiphy that received the beacon
 * @frame: the frame
 * @len: length of the frame
 * @freq: frequency the frame was received on in KHz
 * @sig_dbm: signal strength in dBm, or 0 if unknown
 *
 * Use this function to report to userspace when a beacon was
 * received. It is not useful to call this when there is no
 * netdev that is in AP/GO mode.
 */
void cfg80211_report_obss_beacon_khz(struct wiphy *wiphy, const u8 *frame,
				     size_t len, int freq, int sig_dbm);

/**
 * cfg80211_report_obss_beacon - report beacon from other APs
 * @wiphy: The wiphy that received the beacon
 * @frame: the frame
 * @len: length of the frame
 * @freq: frequency the frame was received on
 * @sig_dbm: signal strength in dBm, or 0 if unknown
 *
 * Use this function to report to userspace when a beacon was
 * received. It is not useful to call this when there is no
 * netdev that is in AP/GO mode.
 */
static inline void cfg80211_report_obss_beacon(struct wiphy *wiphy,
					       const u8 *frame, size_t len,
					       int freq, int sig_dbm)
{
	cfg80211_report_obss_beacon_khz(wiphy, frame, len, MHZ_TO_KHZ(freq),
					sig_dbm);
}

/**
 * struct cfg80211_beaconing_check_config - beacon check configuration
 * @iftype: the interface type to check for
 * @relax: allow IR-relaxation conditions to apply (e.g. another
 *	interface connected already on the same channel)
 *	NOTE: If this is set, wiphy mutex must be held.
 * @reg_power: &enum ieee80211_ap_reg_power value indicating the
 *	advertised/used 6 GHz regulatory power setting
 */
struct cfg80211_beaconing_check_config {
	enum nl80211_iftype iftype;
	enum ieee80211_ap_reg_power reg_power;
	bool relax;
};

/**
 * cfg80211_reg_check_beaconing - check if beaconing is allowed
 * @wiphy: the wiphy
 * @chandef: the channel definition
 * @cfg: additional parameters for the checking
 *
 * Return: %true if there is no secondary channel or the secondary channel(s)
 * can be used for beaconing (i.e. is not a radar channel etc.)
 */
bool cfg80211_reg_check_beaconing(struct wiphy *wiphy,
				  struct cfg80211_chan_def *chandef,
				  struct cfg80211_beaconing_check_config *cfg);

/**
 * cfg80211_reg_can_beacon - check if beaconing is allowed
 * @wiphy: the wiphy
 * @chandef: the channel definition
 * @iftype: interface type
 *
 * Return: %true if there is no secondary channel or the secondary channel(s)
 * can be used for beaconing (i.e. is not a radar channel etc.)
 */
static inline bool
cfg80211_reg_can_beacon(struct wiphy *wiphy,
			struct cfg80211_chan_def *chandef,
			enum nl80211_iftype iftype)
{
	struct cfg80211_beaconing_check_config config = {
		.iftype = iftype,
	};

	return cfg80211_reg_check_beaconing(wiphy, chandef, &config);
}

/**
 * cfg80211_reg_can_beacon_relax - check if beaconing is allowed with relaxation
 * @wiphy: the wiphy
 * @chandef: the channel definition
 * @iftype: interface type
 *
 * Return: %true if there is no secondary channel or the secondary channel(s)
 * can be used for beaconing (i.e. is not a radar channel etc.). This version
 * also checks if IR-relaxation conditions apply, to allow beaconing under
 * more permissive conditions.
 *
 * Context: Requires the wiphy mutex to be held.
 */
static inline bool
cfg80211_reg_can_beacon_relax(struct wiphy *wiphy,
			      struct cfg80211_chan_def *chandef,
			      enum nl80211_iftype iftype)
{
	struct cfg80211_beaconing_check_config config = {
		.iftype = iftype,
		.relax = true,
	};

	return cfg80211_reg_check_beaconing(wiphy, chandef, &config);
}

/**
 * cfg80211_ch_switch_notify - update wdev channel and notify userspace
 * @dev: the device which switched channels
 * @chandef: the new channel definition
 * @link_id: the link ID for MLO, must be 0 for non-MLO
 *
 * Caller must hold wiphy mutex, therefore must only be called from sleepable
 * driver context!
 */
void cfg80211_ch_switch_notify(struct net_device *dev,
			       struct cfg80211_chan_def *chandef,
			       unsigned int link_id);

/**
 * cfg80211_ch_switch_started_notify - notify channel switch start
 * @dev: the device on which the channel switch started
 * @chandef: the future channel definition
 * @link_id: the link ID for MLO, must be 0 for non-MLO
 * @count: the number of TBTTs until the channel switch happens
 * @quiet: whether or not immediate quiet was requested by the AP
 *
 * Inform the userspace about the channel switch that has just
 * started, so that it can take appropriate actions (eg. starting
 * channel switch on other vifs), if necessary.
 */
void cfg80211_ch_switch_started_notify(struct net_device *dev,
				       struct cfg80211_chan_def *chandef,
				       unsigned int link_id, u8 count,
				       bool quiet);

/**
 * ieee80211_operating_class_to_band - convert operating class to band
 *
 * @operating_class: the operating class to convert
 * @band: band pointer to fill
 *
 * Return: %true if the conversion was successful, %false otherwise.
 */
bool ieee80211_operating_class_to_band(u8 operating_class,
				       enum nl80211_band *band);

/**
 * ieee80211_operating_class_to_chandef - convert operating class to chandef
 *
 * @operating_class: the operating class to convert
 * @chan: the ieee80211_channel to convert
 * @chandef: a pointer to the resulting chandef
 *
 * Return: %true if the conversion was successful, %false otherwise.
 */
bool ieee80211_operating_class_to_chandef(u8 operating_class,
					  struct ieee80211_channel *chan,
					  struct cfg80211_chan_def *chandef);

/**
 * ieee80211_chandef_to_operating_class - convert chandef to operation class
 *
 * @chandef: the chandef to convert
 * @op_class: a pointer to the resulting operating class
 *
 * Return: %true if the conversion was successful, %false otherwise.
 */
bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef,
					  u8 *op_class);

/**
 * ieee80211_chandef_to_khz - convert chandef to frequency in KHz
 *
 * @chandef: the chandef to convert
 *
 * Return: the center frequency of chandef (1st segment) in KHz.
 */
static inline u32
ieee80211_chandef_to_khz(const struct cfg80211_chan_def *chandef)
{
	return MHZ_TO_KHZ(chandef->center_freq1) + chandef->freq1_offset;
}

/**
 * cfg80211_tdls_oper_request - request userspace to perform TDLS operation
 * @dev: the device on which the operation is requested
 * @peer: the MAC address of the peer device
 * @oper: the requested TDLS operation (NL80211_TDLS_SETUP or
 *	NL80211_TDLS_TEARDOWN)
 * @reason_code: the reason code for teardown request
 * @gfp: allocation flags
 *
 * This function is used to request userspace to perform TDLS operation that
 * requires knowledge of keys, i.e., link setup or teardown when the AP
 * connection uses encryption. This is optional mechanism for the driver to use
 * if it can automatically determine when a TDLS link could be useful (e.g.,
 * based on traffic and signal strength for a peer).
 */
void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
				enum nl80211_tdls_operation oper,
				u16 reason_code, gfp_t gfp);

/**
 * cfg80211_calculate_bitrate - calculate actual bitrate (in 100Kbps units)
 * @rate: given rate_info to calculate bitrate from
 *
 * Return: calculated bitrate
 */
u32 cfg80211_calculate_bitrate(struct rate_info *rate);

/**
 * cfg80211_unregister_wdev - remove the given wdev
 * @wdev: struct wireless_dev to remove
 *
 * This function removes the device so it can no longer be used. It is necessary
 * to call this function even when cfg80211 requests the removal of the device
 * by calling the del_virtual_intf() callback. The function must also be called
 * when the driver wishes to unregister the wdev, e.g. when the hardware device
 * is unbound from the driver.
 *
 * Context: Requires the RTNL and wiphy mutex to be held.
 */
void cfg80211_unregister_wdev(struct wireless_dev *wdev);

/**
 * cfg80211_register_netdevice - register the given netdev
 * @dev: the netdev to register
 *
 * Note: In contexts coming from cfg80211 callbacks, you must call this rather
 * than register_netdevice(), unregister_netdev() is impossible as the RTNL is
 * held. Otherwise, both register_netdevice() and register_netdev() are usable
 * instead as well.
 *
 * Context: Requires the RTNL and wiphy mutex to be held.
 *
 * Return: 0 on success. Non-zero on error.
 */
int cfg80211_register_netdevice(struct net_device *dev);

/**
 * cfg80211_unregister_netdevice - unregister the given netdev
 * @dev: the netdev to register
 *
 * Note: In contexts coming from cfg80211 callbacks, you must call this rather
 * than unregister_netdevice(), unregister_netdev() is impossible as the RTNL
 * is held. Otherwise, both unregister_netdevice() and unregister_netdev() are
 * usable instead as well.
 *
 * Context: Requires the RTNL and wiphy mutex to be held.
 */
static inline void cfg80211_unregister_netdevice(struct net_device *dev)
{
#if IS_ENABLED(CONFIG_CFG80211)
	cfg80211_unregister_wdev(dev->ieee80211_ptr);
#endif
}

/**
 * struct cfg80211_ft_event_params - FT Information Elements
 * @ies: FT IEs
 * @ies_len: length of the FT IE in bytes
 * @target_ap: target AP's MAC address
 * @ric_ies: RIC IE
 * @ric_ies_len: length of the RIC IE in bytes
 */
struct cfg80211_ft_event_params {
	const u8 *ies;
	size_t ies_len;
	const u8 *target_ap;
	const u8 *ric_ies;
	size_t ric_ies_len;
};

/**
 * cfg80211_ft_event - notify userspace about FT IE and RIC IE
 * @netdev: network device
 * @ft_event: IE information
 */
void cfg80211_ft_event(struct net_device *netdev,
		       struct cfg80211_ft_event_params *ft_event);

/**
 * cfg80211_get_p2p_attr - find and copy a P2P attribute from IE buffer
 * @ies: the input IE buffer
 * @len: the input length
 * @attr: the attribute ID to find
 * @buf: output buffer, can be %NULL if the data isn't needed, e.g.
 *	if the function is only called to get the needed buffer size
 * @bufsize: size of the output buffer
 *
 * The function finds a given P2P attribute in the (vendor) IEs and
 * copies its contents to the given buffer.
 *
 * Return: A negative error code (-%EILSEQ or -%ENOENT) if the data is
 * malformed or the attribute can't be found (respectively), or the
 * length of the found attribute (which can be zero).
 */
int cfg80211_get_p2p_attr(const u8 *ies, unsigned int len,
			  enum ieee80211_p2p_attr_id attr,
			  u8 *buf, unsigned int bufsize);

/**
 * ieee80211_ie_split_ric - split an IE buffer according to ordering (with RIC)
 * @ies: the IE buffer
 * @ielen: the length of the IE buffer
 * @ids: an array with element IDs that are allowed before
 *	the split. A WLAN_EID_EXTENSION value means that the next
 *	EID in the list is a sub-element of the EXTENSION IE.
 * @n_ids: the size of the element ID array
 * @after_ric: array IE types that come after the RIC element
 * @n_after_ric: size of the @after_ric array
 * @offset: offset where to start splitting in the buffer
 *
 * This function splits an IE buffer by updating the @offset
 * variable to point to the location where the buffer should be
 * split.
 *
 * It assumes that the given IE buffer is well-formed, this
 * has to be guaranteed by the caller!
 *
 * It also assumes that the IEs in the buffer are ordered
 * correctly, if not the result of using this function will not
 * be ordered correctly either, i.e. it does no reordering.
 *
 * Return: The offset where the next part of the buffer starts, which
 * may be @ielen if the entire (remainder) of the buffer should be
 * used.
 */
size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
			      const u8 *ids, int n_ids,
			      const u8 *after_ric, int n_after_ric,
			      size_t offset);

/**
 * ieee80211_ie_split - split an IE buffer according to ordering
 * @ies: the IE buffer
 * @ielen: the length of the IE buffer
 * @ids: an array with element IDs that are allowed before
 *	the split. A WLAN_EID_EXTENSION value means that the next
 *	EID in the list is a sub-element of the EXTENSION IE.
 * @n_ids: the size of the element ID array
 * @offset: offset where to start splitting in the buffer
 *
 * This function splits an IE buffer by updating the @offset
 * variable to point to the location where the buffer should be
 * split.
 *
 * It assumes that the given IE buffer is well-formed, this
 * has to be guaranteed by the caller!
 *
 * It also assumes that the IEs in the buffer are ordered
 * correctly, if not the result of using this function will not
 * be ordered correctly either, i.e. it does no reordering.
 *
 * Return: The offset where the next part of the buffer starts, which
 * may be @ielen if the entire (remainder) of the buffer should be
 * used.
 */
static inline size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
					const u8 *ids, int n_ids, size_t offset)
{
	return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
}

/**
 * ieee80211_fragment_element - fragment the last element in skb
 * @skb: The skbuf that the element was added to
 * @len_pos: Pointer to length of the element to fragment
 * @frag_id: The element ID to use for fragments
 *
 * This function fragments all data after @len_pos, adding fragmentation
 * elements with the given ID as appropriate. The SKB will grow in size
 * accordingly.
 */
void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos, u8 frag_id);

/**
 * cfg80211_report_wowlan_wakeup - report wakeup from WoWLAN
 * @wdev: the wireless device reporting the wakeup
 * @wakeup: the wakeup report
 * @gfp: allocation flags
 *
 * This function reports that the given device woke up. If it
 * caused the wakeup, report the reason(s), otherwise you may
 * pass %NULL as the @wakeup parameter to advertise that something
 * else caused the wakeup.
 */
void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
				   struct cfg80211_wowlan_wakeup *wakeup,
				   gfp_t gfp);

/**
 * cfg80211_crit_proto_stopped() - indicate critical protocol stopped by driver.
 *
 * @wdev: the wireless device for which critical protocol is stopped.
 * @gfp: allocation flags
 *
 * This function can be called by the driver to indicate it has reverted
 * operation back to normal. One reason could be that the duration given
 * by .crit_proto_start() has expired.
 */
void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp);

/**
 * ieee80211_get_num_supported_channels - get number of channels device has
 * @wiphy: the wiphy
 *
 * Return: the number of channels supported by the device.
 */
unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy);

/**
 * cfg80211_check_combinations - check interface combinations
 *
 * @wiphy: the wiphy
 * @params: the interface combinations parameter
 *
 * This function can be called by the driver to check whether a
 * combination of interfaces and their types are allowed according to
 * the interface combinations.
 *
 * Return: 0 if combinations are allowed. Non-zero on error.
 */
int cfg80211_check_combinations(struct wiphy *wiphy,
				struct iface_combination_params *params);

/**
 * cfg80211_iter_combinations - iterate over matching combinations
 *
 * @wiphy: the wiphy
 * @params: the interface combinations parameter
 * @iter: function to call for each matching combination
 * @data: pointer to pass to iter function
 *
 * This function can be called by the driver to check what possible
 * combinations it fits in at a given moment, e.g. for channel switching
 * purposes.
 *
 * Return: 0 on success. Non-zero on error.
 */
int cfg80211_iter_combinations(struct wiphy *wiphy,
			       struct iface_combination_params *params,
			       void (*iter)(const struct ieee80211_iface_combination *c,
					    void *data),
			       void *data);
/**
 * cfg80211_get_radio_idx_by_chan - get the radio index by the channel
 *
 * @wiphy: the wiphy
 * @chan: channel for which the supported radio index is required
 *
 * Return: radio index on success or -EINVAL otherwise
 */
int cfg80211_get_radio_idx_by_chan(struct wiphy *wiphy,
				   const struct ieee80211_channel *chan);

/**
 * cfg80211_stop_link - stop AP/P2P_GO link if link_id is non-negative or stops
 *                      all links on the interface.
 *
 * @wiphy: the wiphy
 * @wdev: wireless device
 * @link_id: valid link ID in case of MLO AP/P2P_GO Operation or else -1
 * @gfp: context flags
 *
 * If link_id is set during MLO operation, stops only the specified AP/P2P_GO
 * link and if link_id is set to -1 or last link is stopped, the entire
 * interface is stopped as if AP was stopped, IBSS/mesh left, STA disconnected.
 */
void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev,
			int link_id, gfp_t gfp);

/**
 * cfg80211_stop_iface - trigger interface disconnection
 *
 * @wiphy: the wiphy
 * @wdev: wireless device
 * @gfp: context flags
 *
 * Trigger interface to be stopped as if AP was stopped, IBSS/mesh left, STA
 * disconnected.
 *
 * Note: This doesn't need any locks and is asynchronous.
 */
static inline void
cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, gfp_t gfp)
{
	cfg80211_stop_link(wiphy, wdev, -1, gfp);
}

/**
 * cfg80211_shutdown_all_interfaces - shut down all interfaces for a wiphy
 * @wiphy: the wiphy to shut down
 *
 * This function shuts down all interfaces belonging to this wiphy by
 * calling dev_close() (and treating non-netdev interfaces as needed).
 * It shouldn't really be used unless there are some fatal device errors
 * that really can't be recovered in any other way.
 *
 * Callers must hold the RTNL and be able to deal with callbacks into
 * the driver while the function is running.
 */
void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy);

/**
 * wiphy_ext_feature_set - set the extended feature flag
 *
 * @wiphy: the wiphy to modify.
 * @ftidx: extended feature bit index.
 *
 * The extended features are flagged in multiple bytes (see
 * &struct wiphy.@ext_features)
 */
static inline void wiphy_ext_feature_set(struct wiphy *wiphy,
					 enum nl80211_ext_feature_index ftidx)
{
	u8 *ft_byte;

	ft_byte = &wiphy->ext_features[ftidx / 8];
	*ft_byte |= BIT(ftidx % 8);
}

/**
 * wiphy_ext_feature_isset - check the extended feature flag
 *
 * @wiphy: the wiphy to modify.
 * @ftidx: extended feature bit index.
 *
 * The extended features are flagged in multiple bytes (see
 * &struct wiphy.@ext_features)
 *
 * Return: %true if extended feature flag is set, %false otherwise
 */
static inline bool
wiphy_ext_feature_isset(struct wiphy *wiphy,
			enum nl80211_ext_feature_index ftidx)
{
	u8 ft_byte;

	ft_byte = wiphy->ext_features[ftidx / 8];
	return (ft_byte & BIT(ftidx % 8)) != 0;
}

/**
 * cfg80211_free_nan_func - free NAN function
 * @f: NAN function that should be freed
 *
 * Frees all the NAN function and all it's allocated members.
 */
void cfg80211_free_nan_func(struct cfg80211_nan_func *f);

/**
 * struct cfg80211_nan_match_params - NAN match parameters
 * @type: the type of the function that triggered a match. If it is
 *	 %NL80211_NAN_FUNC_SUBSCRIBE it means that we replied to a subscriber.
 *	 If it is %NL80211_NAN_FUNC_PUBLISH, it means that we got a discovery
 *	 result.
 *	 If it is %NL80211_NAN_FUNC_FOLLOW_UP, we received a follow up.
 * @inst_id: the local instance id
 * @peer_inst_id: the instance id of the peer's function
 * @addr: the MAC address of the peer
 * @info_len: the length of the &info
 * @info: the Service Specific Info from the peer (if any)
 * @cookie: unique identifier of the corresponding function
 */
struct cfg80211_nan_match_params {
	enum nl80211_nan_function_type type;
	u8 inst_id;
	u8 peer_inst_id;
	const u8 *addr;
	u8 info_len;
	const u8 *info;
	u64 cookie;
};

/**
 * cfg80211_nan_match - report a match for a NAN function.
 * @wdev: the wireless device reporting the match
 * @match: match notification parameters
 * @gfp: allocation flags
 *
 * This function reports that the a NAN function had a match. This
 * can be a subscribe that had a match or a solicited publish that
 * was sent. It can also be a follow up that was received.
 */
void cfg80211_nan_match(struct wireless_dev *wdev,
			struct cfg80211_nan_match_params *match, gfp_t gfp);

/**
 * cfg80211_nan_func_terminated - notify about NAN function termination.
 *
 * @wdev: the wireless device reporting the match
 * @inst_id: the local instance id
 * @reason: termination reason (one of the NL80211_NAN_FUNC_TERM_REASON_*)
 * @cookie: unique NAN function identifier
 * @gfp: allocation flags
 *
 * This function reports that the a NAN function is terminated.
 */
void cfg80211_nan_func_terminated(struct wireless_dev *wdev,
				  u8 inst_id,
				  enum nl80211_nan_func_term_reason reason,
				  u64 cookie, gfp_t gfp);

/* ethtool helper */
void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);

/**
 * cfg80211_external_auth_request - userspace request for authentication
 * @netdev: network device
 * @params: External authentication parameters
 * @gfp: allocation flags
 * Returns: 0 on success, < 0 on error
 */
int cfg80211_external_auth_request(struct net_device *netdev,
				   struct cfg80211_external_auth_params *params,
				   gfp_t gfp);

/**
 * cfg80211_pmsr_report - report peer measurement result data
 * @wdev: the wireless device reporting the measurement
 * @req: the original measurement request
 * @result: the result data
 * @gfp: allocation flags
 */
void cfg80211_pmsr_report(struct wireless_dev *wdev,
			  struct cfg80211_pmsr_request *req,
			  struct cfg80211_pmsr_result *result,
			  gfp_t gfp);

/**
 * cfg80211_pmsr_complete - report peer measurement completed
 * @wdev: the wireless device reporting the measurement
 * @req: the original measurement request
 * @gfp: allocation flags
 *
 * Report that the entire measurement completed, after this
 * the request pointer will no longer be valid.
 */
void cfg80211_pmsr_complete(struct wireless_dev *wdev,
			    struct cfg80211_pmsr_request *req,
			    gfp_t gfp);

/**
 * cfg80211_iftype_allowed - check whether the interface can be allowed
 * @wiphy: the wiphy
 * @iftype: interface type
 * @is_4addr: use_4addr flag, must be '0' when check_swif is '1'
 * @check_swif: check iftype against software interfaces
 *
 * Check whether the interface is allowed to operate; additionally, this API
 * can be used to check iftype against the software interfaces when
 * check_swif is '1'.
 *
 * Return: %true if allowed, %false otherwise
 */
bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype,
			     bool is_4addr, u8 check_swif);


/**
 * cfg80211_assoc_comeback - notification of association that was
 * temporarily rejected with a comeback
 * @netdev: network device
 * @ap_addr: AP (MLD) address that rejected the association
 * @timeout: timeout interval value TUs.
 *
 * this function may sleep. the caller must hold the corresponding wdev's mutex.
 */
void cfg80211_assoc_comeback(struct net_device *netdev,
			     const u8 *ap_addr, u32 timeout);

/* Logging, debugging and troubleshooting/diagnostic helpers. */

/* wiphy_printk helpers, similar to dev_printk */

#define wiphy_printk(level, wiphy, format, args...)		\
	dev_printk(level, &(wiphy)->dev, format, ##args)
#define wiphy_emerg(wiphy, format, args...)			\
	dev_emerg(&(wiphy)->dev, format, ##args)
#define wiphy_alert(wiphy, format, args...)			\
	dev_alert(&(wiphy)->dev, format, ##args)
#define wiphy_crit(wiphy, format, args...)			\
	dev_crit(&(wiphy)->dev, format, ##args)
#define wiphy_err(wiphy, format, args...)			\
	dev_err(&(wiphy)->dev, format, ##args)
#define wiphy_warn(wiphy, format, args...)			\
	dev_warn(&(wiphy)->dev, format, ##args)
#define wiphy_notice(wiphy, format, args...)			\
	dev_notice(&(wiphy)->dev, format, ##args)
#define wiphy_info(wiphy, format, args...)			\
	dev_info(&(wiphy)->dev, format, ##args)
#define wiphy_info_once(wiphy, format, args...)			\
	dev_info_once(&(wiphy)->dev, format, ##args)

#define wiphy_err_ratelimited(wiphy, format, args...)		\
	dev_err_ratelimited(&(wiphy)->dev, format, ##args)
#define wiphy_warn_ratelimited(wiphy, format, args...)		\
	dev_warn_ratelimited(&(wiphy)->dev, format, ##args)

#define wiphy_debug(wiphy, format, args...)			\
	wiphy_printk(KERN_DEBUG, wiphy, format, ##args)

#define wiphy_dbg(wiphy, format, args...)			\
	dev_dbg(&(wiphy)->dev, format, ##args)

#if defined(VERBOSE_DEBUG)
#define wiphy_vdbg	wiphy_dbg
#else
#define wiphy_vdbg(wiphy, format, args...)				\
({									\
	if (0)								\
		wiphy_printk(KERN_DEBUG, wiphy, format, ##args);	\
	0;								\
})
#endif

/*
 * wiphy_WARN() acts like wiphy_printk(), but with the key difference
 * of using a WARN/WARN_ON to get the message out, including the
 * file/line information and a backtrace.
 */
#define wiphy_WARN(wiphy, format, args...)			\
	WARN(1, "wiphy: %s\n" format, wiphy_name(wiphy), ##args);

/**
 * cfg80211_update_owe_info_event - Notify the peer's OWE info to user space
 * @netdev: network device
 * @owe_info: peer's owe info
 * @gfp: allocation flags
 */
void cfg80211_update_owe_info_event(struct net_device *netdev,
				    struct cfg80211_update_owe_info *owe_info,
				    gfp_t gfp);

/**
 * cfg80211_bss_flush - resets all the scan entries
 * @wiphy: the wiphy
 */
void cfg80211_bss_flush(struct wiphy *wiphy);

/**
 * cfg80211_bss_color_notify - notify about bss color event
 * @dev: network device
 * @cmd: the actual event we want to notify
 * @count: the number of TBTTs until the color change happens
 * @color_bitmap: representations of the colors that the local BSS is aware of
 * @link_id: valid link_id in case of MLO or 0 for non-MLO.
 *
 * Return: 0 on success. Non-zero on error.
 */
int cfg80211_bss_color_notify(struct net_device *dev,
			      enum nl80211_commands cmd, u8 count,
			      u64 color_bitmap, u8 link_id);

/**
 * cfg80211_obss_color_collision_notify - notify about bss color collision
 * @dev: network device
 * @color_bitmap: representations of the colors that the local BSS is aware of
 * @link_id: valid link_id in case of MLO or 0 for non-MLO.
 *
 * Return: 0 on success. Non-zero on error.
 */
static inline int cfg80211_obss_color_collision_notify(struct net_device *dev,
						       u64 color_bitmap,
						       u8 link_id)
{
	return cfg80211_bss_color_notify(dev, NL80211_CMD_OBSS_COLOR_COLLISION,
					 0, color_bitmap, link_id);
}

/**
 * cfg80211_color_change_started_notify - notify color change start
 * @dev: the device on which the color is switched
 * @count: the number of TBTTs until the color change happens
 * @link_id: valid link_id in case of MLO or 0 for non-MLO.
 *
 * Inform the userspace about the color change that has started.
 *
 * Return: 0 on success. Non-zero on error.
 */
static inline int cfg80211_color_change_started_notify(struct net_device *dev,
						       u8 count, u8 link_id)
{
	return cfg80211_bss_color_notify(dev, NL80211_CMD_COLOR_CHANGE_STARTED,
					 count, 0, link_id);
}

/**
 * cfg80211_color_change_aborted_notify - notify color change abort
 * @dev: the device on which the color is switched
 * @link_id: valid link_id in case of MLO or 0 for non-MLO.
 *
 * Inform the userspace about the color change that has aborted.
 *
 * Return: 0 on success. Non-zero on error.
 */
static inline int cfg80211_color_change_aborted_notify(struct net_device *dev,
						       u8 link_id)
{
	return cfg80211_bss_color_notify(dev, NL80211_CMD_COLOR_CHANGE_ABORTED,
					 0, 0, link_id);
}

/**
 * cfg80211_color_change_notify - notify color change completion
 * @dev: the device on which the color was switched
 * @link_id: valid link_id in case of MLO or 0 for non-MLO.
 *
 * Inform the userspace about the color change that has completed.
 *
 * Return: 0 on success. Non-zero on error.
 */
static inline int cfg80211_color_change_notify(struct net_device *dev,
					       u8 link_id)
{
	return cfg80211_bss_color_notify(dev,
					 NL80211_CMD_COLOR_CHANGE_COMPLETED,
					 0, 0, link_id);
}

/**
 * cfg80211_6ghz_power_type - determine AP regulatory power type
 * @control: control flags
 * @client_flags: &enum ieee80211_channel_flags for station mode to enable
 *	SP to LPI fallback, zero otherwise.
 *
 * Return: regulatory power type from &enum ieee80211_ap_reg_power
 */
static inline enum ieee80211_ap_reg_power
cfg80211_6ghz_power_type(u8 control, u32 client_flags)
{
	switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
	case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
	case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP:
	case IEEE80211_6GHZ_CTRL_REG_AP_ROLE_NOT_RELEVANT:
	case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP_OLD:
		return IEEE80211_REG_LPI_AP;
	case IEEE80211_6GHZ_CTRL_REG_SP_AP:
		return IEEE80211_REG_SP_AP;
	case IEEE80211_6GHZ_CTRL_REG_VLP_AP:
		return IEEE80211_REG_VLP_AP;
	case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP:
		if (client_flags & IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT)
			return IEEE80211_REG_LPI_AP;
		return IEEE80211_REG_SP_AP;
	default:
		return IEEE80211_REG_UNSET_AP;
	}
}

/**
 * cfg80211_links_removed - Notify about removed STA MLD setup links.
 * @dev: network device.
 * @link_mask: BIT mask of removed STA MLD setup link IDs.
 *
 * Inform cfg80211 and the userspace about removed STA MLD setup links due to
 * AP MLD removing the corresponding affiliated APs with Multi-Link
 * reconfiguration. Note that it's not valid to remove all links, in this
 * case disconnect instead.
 * Also note that the wdev mutex must be held.
 */
void cfg80211_links_removed(struct net_device *dev, u16 link_mask);

/**
 * struct cfg80211_mlo_reconf_done_data - MLO reconfiguration data
 * @buf: MLO Reconfiguration Response frame (header + body)
 * @len: length of the frame data
 * @driver_initiated: Indicates whether the add links request is initiated by
 *	driver. This is set to true when the link reconfiguration request
 *	initiated by driver due to AP link recommendation requests
 *	(Ex: BTM (BSS Transition Management) request) handling offloaded to
 *	driver.
 * @added_links: BIT mask of links successfully added to the association
 * @links: per-link information indexed by link ID
 * @links.bss: the BSS that MLO reconfiguration was requested for, ownership of
 *      the pointer moves to cfg80211 in the call to
 *      cfg80211_mlo_reconf_add_done().
 *
 * The BSS pointer must be set for each link for which 'add' operation was
 * requested in the assoc_ml_reconf callback.
 */
struct cfg80211_mlo_reconf_done_data {
	const u8 *buf;
	size_t len;
	bool driver_initiated;
	u16 added_links;
	struct {
		struct cfg80211_bss *bss;
		u8 *addr;
	} links[IEEE80211_MLD_MAX_NUM_LINKS];
};

/**
 * cfg80211_mlo_reconf_add_done - Notify about MLO reconfiguration result
 * @dev: network device.
 * @data: MLO reconfiguration done data, &struct cfg80211_mlo_reconf_done_data
 *
 * Inform cfg80211 and the userspace that processing of ML reconfiguration
 * request to add links to the association is done.
 */
void cfg80211_mlo_reconf_add_done(struct net_device *dev,
				  struct cfg80211_mlo_reconf_done_data *data);

/**
 * cfg80211_schedule_channels_check - schedule regulatory check if needed
 * @wdev: the wireless device to check
 *
 * In case the device supports NO_IR or DFS relaxations, schedule regulatory
 * channels check, as previous concurrent operation conditions may not
 * hold anymore.
 */
void cfg80211_schedule_channels_check(struct wireless_dev *wdev);

/**
 * cfg80211_epcs_changed - Notify about a change in EPCS state
 * @netdev: the wireless device whose EPCS state changed
 * @enabled: set to true if EPCS was enabled, otherwise set to false.
 */
void cfg80211_epcs_changed(struct net_device *netdev, bool enabled);

/**
 * cfg80211_next_nan_dw_notif - Notify about the next NAN Discovery Window (DW)
 * @wdev: Pointer to the wireless device structure
 * @chan: DW channel (6, 44 or 149)
 * @gfp: Memory allocation flags
 */
void cfg80211_next_nan_dw_notif(struct wireless_dev *wdev,
				struct ieee80211_channel *chan, gfp_t gfp);

/**
 * cfg80211_nan_cluster_joined - Notify about NAN cluster join
 * @wdev: Pointer to the wireless device structure
 * @cluster_id: Cluster ID of the NAN cluster that was joined or started
 * @new_cluster: Indicates if this is a new cluster or an existing one
 * @gfp: Memory allocation flags
 *
 * This function is used to notify user space when a NAN cluster has been
 * joined, providing the cluster ID and a flag whether it is a new cluster.
 */
void cfg80211_nan_cluster_joined(struct wireless_dev *wdev,
				 const u8 *cluster_id, bool new_cluster,
				 gfp_t gfp);

#ifdef CONFIG_CFG80211_DEBUGFS
/**
 * wiphy_locked_debugfs_read - do a locked read in debugfs
 * @wiphy: the wiphy to use
 * @file: the file being read
 * @buf: the buffer to fill and then read from
 * @bufsize: size of the buffer
 * @userbuf: the user buffer to copy to
 * @count: read count
 * @ppos: read position
 * @handler: the read handler to call (under wiphy lock)
 * @data: additional data to pass to the read handler
 *
 * Return: the number of characters read, or a negative errno
 */
ssize_t wiphy_locked_debugfs_read(struct wiphy *wiphy, struct file *file,
				  char *buf, size_t bufsize,
				  char __user *userbuf, size_t count,
				  loff_t *ppos,
				  ssize_t (*handler)(struct wiphy *wiphy,
						     struct file *file,
						     char *buf,
						     size_t bufsize,
						     void *data),
				  void *data);

/**
 * wiphy_locked_debugfs_write - do a locked write in debugfs
 * @wiphy: the wiphy to use
 * @file: the file being written to
 * @buf: the buffer to copy the user data to
 * @bufsize: size of the buffer
 * @userbuf: the user buffer to copy from
 * @count: read count
 * @handler: the write handler to call (under wiphy lock)
 * @data: additional data to pass to the write handler
 *
 * Return: the number of characters written, or a negative errno
 */
ssize_t wiphy_locked_debugfs_write(struct wiphy *wiphy, struct file *file,
				   char *buf, size_t bufsize,
				   const char __user *userbuf, size_t count,
				   ssize_t (*handler)(struct wiphy *wiphy,
						      struct file *file,
						      char *buf,
						      size_t count,
						      void *data),
				   void *data);
#endif

/**
 * cfg80211_s1g_get_start_freq_khz - get S1G chandef start frequency
 * @chandef: the chandef to use
 *
 * Return: the chandefs starting frequency in KHz
 */
static inline u32
cfg80211_s1g_get_start_freq_khz(const struct cfg80211_chan_def *chandef)
{
	u32 bw_mhz = cfg80211_chandef_get_width(chandef);
	u32 center_khz =
		MHZ_TO_KHZ(chandef->center_freq1) + chandef->freq1_offset;
	return center_khz - bw_mhz * 500 + 500;
}

/**
 * cfg80211_s1g_get_end_freq_khz - get S1G chandef end frequency
 * @chandef: the chandef to use
 *
 * Return: the chandefs ending frequency in KHz
 */
static inline u32
cfg80211_s1g_get_end_freq_khz(const struct cfg80211_chan_def *chandef)
{
	u32 bw_mhz = cfg80211_chandef_get_width(chandef);
	u32 center_khz =
		MHZ_TO_KHZ(chandef->center_freq1) + chandef->freq1_offset;
	return center_khz + bw_mhz * 500 - 500;
}

/**
 * cfg80211_s1g_get_primary_sibling - retrieve the sibling 1MHz subchannel
 *	for an S1G chandef using a 2MHz primary channel.
 * @wiphy: wiphy the channel belongs to
 * @chandef: the chandef to use
 *
 * When chandef::s1g_primary_2mhz is set to true, we are operating on a 2MHz
 * primary channel. The 1MHz subchannel designated by the primary channel
 * location exists within chandef::chan, whilst the 'sibling' is denoted as
 * being the other 1MHz subchannel that make up the 2MHz primary channel.
 *
 * Returns: the sibling 1MHz &struct ieee80211_channel, or %NULL on failure.
 */
static inline struct ieee80211_channel *
cfg80211_s1g_get_primary_sibling(struct wiphy *wiphy,
				 const struct cfg80211_chan_def *chandef)
{
	int width_mhz = cfg80211_chandef_get_width(chandef);
	u32 pri_1mhz_khz, sibling_1mhz_khz, op_low_1mhz_khz, pri_index;

	if (!chandef->s1g_primary_2mhz || width_mhz < 2)
		return NULL;

	pri_1mhz_khz = ieee80211_channel_to_khz(chandef->chan);
	op_low_1mhz_khz = cfg80211_s1g_get_start_freq_khz(chandef);

	/*
	 * Compute the index of the primary 1 MHz subchannel within the
	 * operating channel, relative to the lowest 1 MHz center frequency.
	 * Flip the least significant bit to select the even/odd sibling,
	 * then translate that index back into a channel frequency.
	 */
	pri_index = (pri_1mhz_khz - op_low_1mhz_khz) / 1000;
	sibling_1mhz_khz = op_low_1mhz_khz + ((pri_index ^ 1) * 1000);

	return ieee80211_get_channel_khz(wiphy, sibling_1mhz_khz);
}

#endif /* __NET_CFG80211_H */
]

gemini-3-flash-preview

							input: 218272
							output: 61
							thoughts: 79
						

Okay, here's my thought process on this function, formatted for you:

**Locating the `ieee80211_data_to_8023_exthdr` Function**

Alright, I'm digging into this `ieee80211_data_to_8023_exthdr` function. I *know* it's around, but I'm trying to pin down its definition. My first instinct, given the context, is to check `include/net/cfg80211.h`. But, nope, just a declaration in that header. Not what I'm after. *Damn*, I have to go through the whole file. Hmm, let me check the line numbers. Okay, *here* we go...line 7240. That's a good starting point. Now, to find the actual implementation. Time to search for the definition. I'll need to remember this line number, just in case.

map[ContextFile:net/mac80211/util.c IncludeLines:true Name:ieee80211_data_to_8023_exthdr]

map[SourceCode: 572:	int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
 573:					  const u8 *addr, enum nl80211_iftype iftype,
 574:					  u8 data_offset, bool is_amsdu)
 575:	{
 576:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 577:		struct {
 578:			u8 hdr[ETH_ALEN] __aligned(2);
 579:			__be16 proto;
 580:		} payload;
 581:		struct ethhdr tmp;
 582:		u16 hdrlen;
 583:	
 584:		if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
 585:			return -1;
 586:	
 587:		hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset;
 588:		if (skb->len < hdrlen)
 589:			return -1;
 590:	
 591:		/* convert IEEE 802.11 header + possible LLC headers into Ethernet
 592:		 * header
 593:		 * IEEE 802.11 address fields:
 594:		 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
 595:		 *   0     0   DA    SA    BSSID n/a
 596:		 *   0     1   DA    BSSID SA    n/a
 597:		 *   1     0   BSSID SA    DA    n/a
 598:		 *   1     1   RA    TA    DA    SA
 599:		 */
 600:		memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
 601:		memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
 602:	
 603:		switch (hdr->frame_control &
 604:			cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
 605:		case cpu_to_le16(IEEE80211_FCTL_TODS):
 606:			if (unlikely(iftype != NL80211_IFTYPE_AP &&
 607:				     iftype != NL80211_IFTYPE_AP_VLAN &&
 608:				     iftype != NL80211_IFTYPE_P2P_GO))
 609:				return -1;
 610:			break;
 611:		case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
 612:			if (unlikely(iftype != NL80211_IFTYPE_MESH_POINT &&
 613:				     iftype != NL80211_IFTYPE_AP_VLAN &&
 614:				     iftype != NL80211_IFTYPE_STATION))
 615:				return -1;
 616:			break;
 617:		case cpu_to_le16(IEEE80211_FCTL_FROMDS):
 618:			if ((iftype != NL80211_IFTYPE_STATION &&
 619:			     iftype != NL80211_IFTYPE_P2P_CLIENT &&
 620:			     iftype != NL80211_IFTYPE_MESH_POINT) ||
 621:			    (is_multicast_ether_addr(tmp.h_dest) &&
 622:			     ether_addr_equal(tmp.h_source, addr)))
 623:				return -1;
 624:			break;
 625:		case cpu_to_le16(0):
 626:			if (iftype != NL80211_IFTYPE_ADHOC &&
 627:			    iftype != NL80211_IFTYPE_STATION &&
 628:			    iftype != NL80211_IFTYPE_OCB)
 629:					return -1;
 630:			break;
 631:		}
 632:	
 633:		if (likely(!is_amsdu && iftype != NL80211_IFTYPE_MESH_POINT &&
 634:			   skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 &&
 635:			   ieee80211_get_8023_tunnel_proto(&payload, &tmp.h_proto))) {
 636:			/* remove RFC1042 or Bridge-Tunnel encapsulation */
 637:			hdrlen += ETH_ALEN + 2;
 638:			skb_postpull_rcsum(skb, &payload, ETH_ALEN + 2);
 639:		} else {
 640:			tmp.h_proto = htons(skb->len - hdrlen);
 641:		}
 642:	
 643:		pskb_pull(skb, hdrlen);
 644:	
 645:		if (!ehdr)
 646:			ehdr = skb_push(skb, sizeof(struct ethhdr));
 647:		memcpy(ehdr, &tmp, sizeof(tmp));
 648:	
 649:		return 0;
 650:	}
 SourceFile:net/wireless/util.c]

gemini-3-flash-preview

The investigation into whether a remote attacker can trigger a `WARN` in the TDLS (Tunneled Direct Link Setup) management frame processing is currently focused on the interaction between the 802.11 receive path and the asynchronous worker that processes TDLS channel switch frames.

### 1. Approaches and Results

*   **Broad Warning/Bug Search:** Initial attempts to grep for all `WARN` and `BUG` macros in `net/wireless` and `net/mac80211` were performed. This yielded an overwhelming number of results, necessitating a more targeted approach.
*   **TDLS Source Analysis:** The file `net/mac80211/tdls.c` was identified as the core logic for TDLS. A specific `WARN_ON_ONCE(1)` was found in the function `ieee80211_process_tdls_channel_switch`.
*   **Call Path Tracing:**
    *   The function `ieee80211_process_tdls_channel_switch` is called by `ieee80211_iface_work` in `net/mac80211/iface.c`.
    *   `ieee80211_iface_work` is a worker function that dequeues packets from `sdata->skb_queue`.
    *   Packets are added to this queue via `__ieee80211_queue_skb_to_iface` in `net/mac80211/rx.c`.
*   **RX Path Filtering Analysis:** The receive handler `ieee80211_rx_h_data` in `net/mac80211/rx.c` was examined to see how it handles TDLS frames. It contains a specific check for the `ETH_P_TDLS` protocol.

### 2. Current Hypotheses and Theories

*   **The "Unreachable Warning" Theory:** The current primary hypothesis is that the `WARN_ON_ONCE(1)` in `ieee80211_process_tdls_channel_switch` is **not** remotely triggerable. 
    *   The `WARN` is located in the `default` case of a switch statement checking `tf->action_code`.
    *   However, the code in `net/mac80211/rx.c` (`ieee80211_rx_h_data`) that queues these frames for the worker thread has a strict whitelist. It only queues the frame if `tf->action_code` is either `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE`.
    *   If an attacker sends a TDLS frame with any other action code, `ieee80211_rx_h_data` will not queue it as a TDLS protocol frame, and it will never reach the vulnerable switch statement.

### 3. Critical File Paths and Code Snippets

*   **`net/mac80211/tdls.c`**: Contains the target `WARN_ON_ONCE(1)`:
    ```c
    void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) {
        // ...
        switch (tf->action_code) {
        case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
            ieee80211_process_tdls_channel_switch_req(sdata, skb);
            break;
        case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
            ieee80211_process_tdls_channel_switch_resp(sdata, skb);
            break;
        default:
            WARN_ON_ONCE(1); // Target Warning
            return;
        }
    }
    ```
*   **`net/mac80211/rx.c`**: Contains the "guard" logic in `ieee80211_rx_h_data`:
    ```c
    if (tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
        tf->category == WLAN_CATEGORY_TDLS &&
        (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
         tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
        rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
        __ieee80211_queue_skb_to_iface(sdata, rx->link_id, rx->sta, rx->skb);
        return RX_QUEUED;
    }
    ```
*   **`net/mac80211/iface.c`**: Contains the dispatcher `ieee80211_iface_work` which bridges the queue and the TDLS processing logic.

### 4. Potential Reasoning Loops / Repetitive Tool Calls

*   The initial broad search for `WARN|BUG` was a significant waste of resources and should be avoided in favor of subsystem-specific searches.
*   The investigation is currently stable, but care must be taken not to re-verify the same call path without looking for alternative entry points (e.g., other functions that might call `ieee80211_process_tdls_channel_switch` or other ways to populate `skb_queue`). Currently, only one reference to the processing function exists.

							input: 213220
							output: 1257
							thoughts: 1533
						

gemini-3-flash-preview

							input: 4508
							output: 116
							thoughts: 308
						

**Investigating the Reachability of WARN_ON_ONCE**

Okay, so I'm trying to figure out if that `WARN_ON_ONCE(1)` in `net/mac80211/tdls.c` can be triggered remotely. My initial hunch, based on the previous investigation, is that it's probably unreachable because the RX path filters for specific action codes before the frame even gets to the worker that calls the function with the warning. But let's verify that and see if there are any other ways in.

First, I need to confirm my current understanding of the code. Let's start by:

1.  Double-checking the relevant code in `net/mac80211/tdls.c` for `ieee80211_process_tdls_channel_switch` itself. I need to make sure I'm not missing something obvious.
2.  Next, I'll confirm the path within `net/mac80211/rx.c`, specifically focusing on `ieee80211_rx_h_data` and how it handles those `ETH_P_TDLS` frames. Understanding the filtering logic is key here.
3.  Then, I'll quickly check for *any* other callers of `ieee80211_process_tdls_channel_switch`. Might be a backdoor I'm not aware of. Gotta be thorough.
4.  After that, I'll need to look for other possible ways an SKB containing an `ETH_P_TDLS` frame might get queued to `sdata->skb_queue` in the first place, regardless of the action code.
5.  Finally, I want to confirm that `tf->action_code` can't be modified between the check in `rx.c` and the switch in `tdls.c`. This is important, as it might mean the initial filtering is bypassed later.

Alright, time to dive into the code and start confirming these assumptions.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_process_tdls_channel_switch]

map[SourceCode:2005:	void
2006:	ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
2007:					      struct sk_buff *skb)
2008:	{
2009:		struct ieee80211_tdls_data *tf = (void *)skb->data;
2010:		struct wiphy *wiphy = sdata->local->hw.wiphy;
2011:	
2012:		lockdep_assert_wiphy(wiphy);
2013:	
2014:		/* make sure the driver supports it */
2015:		if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
2016:			return;
2017:	
2018:		/* we want to access the entire packet */
2019:		if (skb_linearize(skb))
2020:			return;
2021:		/*
2022:		 * The packet/size was already validated by mac80211 Rx path, only look
2023:		 * at the action type.
2024:		 */
2025:		switch (tf->action_code) {
2026:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
2027:			ieee80211_process_tdls_channel_switch_req(sdata, skb);
2028:			break;
2029:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
2030:			ieee80211_process_tdls_channel_switch_resp(sdata, skb);
2031:			break;
2032:		default:
2033:			WARN_ON_ONCE(1);
2034:			return;
2035:		}
2036:	}
 SourceFile:net/mac80211/tdls.c]

map[Name:ieee80211_process_tdls_channel_switch]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_iface_work SourceFile:net/mac80211/iface.c SourceLine:1800]] TruncatedOutput:false]

requested entity does not exist

map[Name:ETH_P_TDLS]

map[References:<nil> TruncatedOutput:false]

gemini-3-flash-preview

							input: 6019
							output: 74
							thoughts: 109
						

**Investigating the Definition and Usage of `ETH_P_TDLS`**

Okay, so I'm trying to track down where `ETH_P_TDLS` is defined and how it's used. My initial thought is that it might be defined as a macro in a header file, which is often the case with these protocol constants. The usual `codesearch-find-references` tool might miss the macro definition, so I'll try `grepper` instead – that's often better at finding macros. I need to be thorough; missing the definition could lead me down the wrong path.

To understand how `ETH_P_TDLS` is *used* in a practical context, I'll examine `net/mac80211/iface.c`. Specifically, I'll be looking at how `ieee80211_iface_work` interacts with `ieee80211_process_tdls_channel_switch`. Knowing the calling context often provides the key insights into the constant's purpose and its implications within the driver's overall functionality. I'm hoping to get a clear picture of its behavior within the mac80211 framework.

map[Expression:ETH_P_TDLS]

map[Output:drivers/net/wireless/intel/iwlwifi/mld/rx.c=1544=static int iwl_mld_build_rx_skb(struct iwl_mld *mld, struct sk_buff *skb,
--
drivers/net/wireless/intel/iwlwifi/mld/rx.c-1612-			      shdr->type != htons(ETH_P_PAE) &&
drivers/net/wireless/intel/iwlwifi/mld/rx.c:1613:			      shdr->type != htons(ETH_P_TDLS))))
drivers/net/wireless/intel/iwlwifi/mld/rx.c-1614-			skb->ip_summed = CHECKSUM_NONE;
--
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c=91=static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
--
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c-171-			      shdr->type != htons(ETH_P_PAE) &&
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c:172:			      shdr->type != htons(ETH_P_TDLS))))
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c-173-			skb->ip_summed = CHECKSUM_NONE;
--
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c=20=static int mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c-43-			if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c:44:			    ntohs(rx_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c-45-				mwifiex_process_tdls_action_frame(priv,
--
drivers/net/wireless/marvell/mwifiex/main.c=770=mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/main.c-778-	     ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/main.c:779:	     (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
drivers/net/wireless/marvell/mwifiex/main.c-780-		mwifiex_dbg(priv->adapter, DATA,
--
drivers/net/wireless/marvell/mwifiex/sta_rx.c=71=int mwifiex_process_rx_packet(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/sta_rx.c-148-	if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/sta_rx.c:149:	    ntohs(rx_pkt_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
drivers/net/wireless/marvell/mwifiex/sta_rx.c-150-		offset = (u8 *)local_rx_pd + rx_pkt_off;
--
drivers/net/wireless/marvell/mwifiex/tdls.c=464=static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-479-	memcpy(tf->sa, priv->curr_addr, ETH_ALEN);
drivers/net/wireless/marvell/mwifiex/tdls.c:480:	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
drivers/net/wireless/marvell/mwifiex/tdls.c-481-	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
--
drivers/net/wireless/marvell/mwifiex/wmm.c=808=mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/wmm.c-823-	    ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) {
drivers/net/wireless/marvell/mwifiex/wmm.c:824:		if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS)
drivers/net/wireless/marvell/mwifiex/wmm.c-825-			mwifiex_dbg(adapter, DATA,
--
include/linux/ieee80211.h=2579=static inline int ieee80211_get_tdls_action(struct sk_buff *skb)
--
include/linux/ieee80211.h-2585-
include/linux/ieee80211.h:2586:		if (get_unaligned_be16(tdls_data) == ETH_P_TDLS &&
include/linux/ieee80211.h-2587-		    tdls_data[2] == WLAN_TDLS_SNAP_RFTYPE &&
--
include/uapi/linux/if_ether.h-110-#define ETH_P_IBOE	0x8915		/* Infiniband over Ethernet	*/
include/uapi/linux/if_ether.h:111:#define ETH_P_TDLS	0x890D          /* TDLS */
include/uapi/linux/if_ether.h-112-#define ETH_P_FIP	0x8914		/* FCoE Initialization Protocol */
--
net/mac80211/iface.c=1779=static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
--
net/mac80211/iface.c-1798-
net/mac80211/iface.c:1799:		if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
net/mac80211/iface.c-1800-			ieee80211_process_tdls_channel_switch(sdata, skb);
--
net/mac80211/rx.c=3262=ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
--
net/mac80211/rx.c-3301-	if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
net/mac80211/rx.c:3302:						cpu_to_be16(ETH_P_TDLS))) {
net/mac80211/rx.c-3303-		struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
--
net/mac80211/rx.c-3310-		     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
net/mac80211/rx.c:3311:			rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
net/mac80211/rx.c-3312-			__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
--
net/mac80211/rx.c=4925=static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
--
net/mac80211/rx.c-5007-		 */
net/mac80211/rx.c:5008:		if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||
net/mac80211/rx.c-5009-			     payload->proto == fast_rx->control_port_protocol))
--
net/mac80211/tdls.c=791=ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-802-	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
net/mac80211/tdls.c:803:	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
net/mac80211/tdls.c-804-	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
--
net/mac80211/tx.c=2470=static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
--
net/mac80211/tx.c-2473-
net/mac80211/tx.c:2474:	return ethertype == ETH_P_TDLS &&
net/mac80211/tx.c-2475-	       skb->len > 14 &&
]

map[ContextFile:net/mac80211/iface.c IncludeLines:true Name:ieee80211_iface_work]

map[SourceCode:1779:	static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1780:	{
1781:		struct ieee80211_sub_if_data *sdata =
1782:			container_of(work, struct ieee80211_sub_if_data, work);
1783:		struct ieee80211_local *local = sdata->local;
1784:		struct sk_buff *skb;
1785:	
1786:		if (!ieee80211_sdata_running(sdata))
1787:			return;
1788:	
1789:		if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1790:			return;
1791:	
1792:		if (!ieee80211_can_run_worker(local))
1793:			return;
1794:	
1795:		/* first process frames */
1796:		while ((skb = skb_dequeue(&sdata->skb_queue))) {
1797:			kcov_remote_start_common(skb_get_kcov_handle(skb));
1798:	
1799:			if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1800:				ieee80211_process_tdls_channel_switch(sdata, skb);
1801:			else
1802:				ieee80211_iface_process_skb(local, sdata, skb);
1803:	
1804:			consume_skb(skb);
1805:			kcov_remote_stop();
1806:		}
1807:	
1808:		/* process status queue */
1809:		while ((skb = skb_dequeue(&sdata->status_queue))) {
1810:			kcov_remote_start_common(skb_get_kcov_handle(skb));
1811:	
1812:			ieee80211_iface_process_status(sdata, skb);
1813:			consume_skb(skb);
1814:	
1815:			kcov_remote_stop();
1816:		}
1817:	
1818:		/* then other type-dependent work */
1819:		switch (sdata->vif.type) {
1820:		case NL80211_IFTYPE_STATION:
1821:			ieee80211_sta_work(sdata);
1822:			break;
1823:		case NL80211_IFTYPE_ADHOC:
1824:			ieee80211_ibss_work(sdata);
1825:			break;
1826:		case NL80211_IFTYPE_MESH_POINT:
1827:			if (!ieee80211_vif_is_mesh(&sdata->vif))
1828:				break;
1829:			ieee80211_mesh_work(sdata);
1830:			break;
1831:		case NL80211_IFTYPE_OCB:
1832:			ieee80211_ocb_work(sdata);
1833:			break;
1834:		default:
1835:			break;
1836:		}
1837:	}
 SourceFile:net/mac80211/iface.c]

gemini-3-flash-preview

							input: 9956
							output: 54
							thoughts: 113
						

**Analyzing the TDLS Packet Flow in mac80211**

Okay, so I'm digging into this `ieee80211_iface_work` function, trying to understand the packet flow. It's clear that it's responsible for processing incoming packets dequeued from `sdata->skb_queue`. The interesting part is the conditional: if the packet's protocol is `ETH_P_TDLS`, it then hands it off to `ieee80211_process_tdls_channel_switch`. This suggests a specific path for TDLS-related channel switch events.

Now, where do these `ETH_P_TDLS` packets actually get queued to begin with? I need to trace back from `ieee80211_iface_work` to understand the origin and conditions of queuing these specific SKBs. So, my next move is to examine `net/mac80211/rx.c`. I'm going to look for the queuing logic involving `sdata->skb_queue` and specifically look at how packets with `ETH_P_TDLS` are being handled and queued. Understanding this context is crucial for a complete picture of how TDLS channel switches are managed.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_h_data]

map[SourceCode:3261:	static ieee80211_rx_result debug_noinline
3262:	ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
3263:	{
3264:		struct ieee80211_sub_if_data *sdata = rx->sdata;
3265:		struct ieee80211_local *local = rx->local;
3266:		struct net_device *dev = sdata->dev;
3267:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
3268:		__le16 fc = hdr->frame_control;
3269:		ieee80211_rx_result res;
3270:		bool port_control;
3271:	
3272:		if (unlikely(!ieee80211_is_data(hdr->frame_control)))
3273:			return RX_CONTINUE;
3274:	
3275:		if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
3276:			return RX_DROP_U_NULL_DATA;
3277:	
3278:		/* Send unexpected-4addr-frame event to hostapd */
3279:		if (ieee80211_has_a4(hdr->frame_control) &&
3280:		    sdata->vif.type == NL80211_IFTYPE_AP) {
3281:			if (rx->sta &&
3282:			    !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT))
3283:				cfg80211_rx_unexpected_4addr_frame(
3284:					rx->sdata->dev, rx->sta->sta.addr, rx->link_id,
3285:					GFP_ATOMIC);
3286:			return RX_DROP_U_UNEXPECTED_4ADDR;
3287:		}
3288:	
3289:		res = __ieee80211_data_to_8023(rx, &port_control);
3290:		if (unlikely(res != RX_CONTINUE))
3291:			return res;
3292:	
3293:		res = ieee80211_rx_mesh_data(rx->sdata, rx->sta, rx->skb);
3294:		if (res != RX_CONTINUE)
3295:			return res;
3296:	
3297:		if (!ieee80211_frame_allowed(rx, fc))
3298:			return RX_DROP_U_PORT_CONTROL;
3299:	
3300:		/* directly handle TDLS channel switch requests/responses */
3301:		if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
3302:							cpu_to_be16(ETH_P_TDLS))) {
3303:			struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
3304:	
3305:			if (pskb_may_pull(rx->skb,
3306:					  offsetof(struct ieee80211_tdls_data, u)) &&
3307:			    tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
3308:			    tf->category == WLAN_CATEGORY_TDLS &&
3309:			    (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
3310:			     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
3311:				rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
3312:				__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
3313:							       rx->sta, rx->skb);
3314:				return RX_QUEUED;
3315:			}
3316:		}
3317:	
3318:		if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
3319:		    unlikely(port_control) && sdata->bss) {
3320:			sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
3321:					     u.ap);
3322:			dev = sdata->dev;
3323:			rx->sdata = sdata;
3324:		}
3325:	
3326:		rx->skb->dev = dev;
3327:	
3328:		if (!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
3329:		    local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 &&
3330:		    !is_multicast_ether_addr(
3331:			    ((struct ethhdr *)rx->skb->data)->h_dest) &&
3332:		    (!local->scanning &&
3333:		     !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)))
3334:			mod_timer(&local->dynamic_ps_timer, jiffies +
3335:				  msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
3336:	
3337:		ieee80211_deliver_skb(rx);
3338:	
3339:		return RX_QUEUED;
3340:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 11977
							output: 58
							thoughts: 998
						

**Investigating a Potential TDLS Vulnerability**

Okay, so I'm looking at this `ieee80211_rx_h_data` function, specifically lines 3301-3316. It's checking for TDLS frames, which makes sense. It looks for Ethernet protocol `ETH_P_TDLS` and, crucially, it checks the `action_code` of the TDLS frame to be either `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE` before setting `rx->skb->protocol` and queuing the packet. My initial thought is, this seems straightforward, right? We're filtering the TDLS channel switch requests and responses before further processing.

However, I'm concerned because the `ieee80211_process_tdls_channel_switch` function in `tdls.c` has a `default` case in its `switch` statement for `tf->action_code` and that makes me wonder how a frame *could* reach that default case since `ieee80211_rx_h_data` is supposed to prevent it!

So, I start to think. Could there be *another* way to set `skb->protocol` to `ETH_P_TDLS`? Or can the value of `tf->action_code` be changed *after* this initial check in `rx.c`? `tf` points to `skb->data`, which is concerning.

Then it hits me: `ieee80211_rx_h_data` is called *after* `__ieee80211_data_to_8023`. And that function handles the conversion from 802.11 frames to 802.3 Ethernet frames. TDLS frames are encapsulated as data frames, right?

Alright, let's back up and consider how a malicious frame *could* exploit this, specifically if it's sent over the air as an 802.11 data frame with a custom LLC/SNAP header that would make it a TDLS frame to `__ieee80211_data_to_8023`.

This suggests the potential for an attack vector. So, I need to understand what `__ieee80211_data_to_8023` *does* with TDLS frames. I'm going to look at that function next, in `net/mac80211/rx.c`. This could be key to understanding the potential vulnerability. I need to see how the conversion happens and if the malicious frame could somehow slip through with an invalid `action_code`.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:__ieee80211_data_to_8023]

map[SourceCode:2624:	static ieee80211_rx_result
2625:	__ieee80211_data_to_8023(struct ieee80211_rx_data *rx, bool *port_control)
2626:	{
2627:		struct ieee80211_sub_if_data *sdata = rx->sdata;
2628:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
2629:		bool check_port_control = false;
2630:		struct ethhdr *ehdr;
2631:		int ret;
2632:	
2633:		*port_control = false;
2634:		if (ieee80211_has_a4(hdr->frame_control) &&
2635:		    sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
2636:			return RX_DROP_U_UNEXPECTED_VLAN_4ADDR;
2637:	
2638:		if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2639:		    !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
2640:			if (!sdata->u.mgd.use_4addr)
2641:				return RX_DROP_U_UNEXPECTED_STA_4ADDR;
2642:			else if (!ether_addr_equal(hdr->addr1, sdata->vif.addr))
2643:				check_port_control = true;
2644:		}
2645:	
2646:		if (is_multicast_ether_addr(hdr->addr1) &&
2647:		    sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
2648:			return RX_DROP_U_UNEXPECTED_VLAN_MCAST;
2649:	
2650:		ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
2651:		if (ret < 0)
2652:			return RX_DROP_U_INVALID_8023;
2653:	
2654:		ehdr = (struct ethhdr *) rx->skb->data;
2655:		if (ehdr->h_proto == rx->sdata->control_port_protocol)
2656:			*port_control = true;
2657:		else if (check_port_control)
2658:			return RX_DROP_U_NOT_PORT_CONTROL;
2659:	
2660:		return RX_CONTINUE;
2661:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 14456
							output: 57
							thoughts: 112
						

**Diving into the Code**

Okay, so the code's calling `ieee80211_data_to_8023`. Time to figure out what's going on there. My first instinct is to check `net/mac80211/util.c` or a similar utility file within the mac80211 module. That's usually where these kinds of data conversion functions live.

But wait a minute... let me double-check with `grepper`. Ah, interesting. It looks like `include/linux/ieee80211.h` has a function called `ieee80211_get_tdls_action`. While that isn't the function in question, it gives me another avenue to explore.

Alright, back to the main goal. Let's find out where `ieee80211_data_to_8023` is actually defined. Let's start the search.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_data_to_8023]

map[SourceCode:7244:	/**
7245:	 * ieee80211_data_to_8023 - convert an 802.11 data frame to 802.3
7246:	 * @skb: the 802.11 data frame
7247:	 * @addr: the device MAC address
7248:	 * @iftype: the virtual interface type
7249:	 * Return: 0 on success. Non-zero on error.
7250:	 */
7251:	static inline int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
7252:						 enum nl80211_iftype iftype)
7253:	{
7254:		return ieee80211_data_to_8023_exthdr(skb, NULL, addr, iftype, 0, false);
7255:	}
 SourceFile:include/net/cfg80211.h]

gemini-3-flash-preview

							input: 15128
							output: 31
							thoughts: 142
						

**Navigating the Labyrinth of Kernel Code**

Okay, so I'm chasing down the source for `ieee80211_data_to_8023`. My initial gut feeling, given my experience, leans towards `net/mac80211/util.c` or perhaps `net/mac80211/rx.c`. I mean, that function sounds like it's converting between 802.11 and 802.3 formats, so those are logical places to start, focusing on the MAC layer.

Wait, what? The previous `codesearch-definition-source` result pointed to `include/net/cfg80211.h`? That's... unusual, at least initially. My immediate thought is, "Nah, that can't be right; the *declaration* might be there, but the *implementation*? Unlikely." I need to be more precise: the results say "SourceFile: include/net/cfg80211.h" I'm interpreting that as the declaration location. The implementation is the key.

Okay, let's start with `net/mac80211/util.c` and dig deeper.

map[SourceFile:net/mac80211/util.c]

map[Entities:[map[Kind:function Name:__ieee80211_flush_queues] map[Kind:function Name:__ieee80211_get_radio_mask] map[Kind:function Name:__ieee80211_iterate_interfaces] map[Kind:function Name:__ieee80211_iterate_stations] map[Kind:function Name:__ieee80211_stop_queue] map[Kind:function Name:__ieee80211_wake_queue] map[Kind:function Name:__ieee80211_wake_txqs] map[Kind:function Name:__iterate_interfaces] map[Kind:function Name:__iterate_stations] map[Kind:function Name:_ieee80211_wake_txqs] map[Kind:function Name:ieee80211_add_aid_request_ie] map[Kind:function Name:ieee80211_add_pending_skb] map[Kind:function Name:ieee80211_add_pending_skbs] map[Kind:function Name:ieee80211_add_s1g_capab_ie] map[Kind:function Name:ieee80211_add_wmm_info_ie] map[Kind:function Name:ieee80211_assign_chanctx] map[Kind:function Name:ieee80211_ave_rssi] map[Kind:function Name:ieee80211_build_preq_ies] map[Kind:function Name:ieee80211_build_probe_req] map[Kind:function Name:ieee80211_calculate_rx_timestamp] map[Kind:function Name:ieee80211_can_queue_work] map[Kind:function Name:ieee80211_chanctx_radar_detect] map[Kind:function Name:ieee80211_chandef_downgrade] map[Kind:function Name:ieee80211_chandef_eht_oper] map[Kind:function Name:ieee80211_chandef_he_6ghz_oper] map[Kind:function Name:ieee80211_chandef_ht_oper] map[Kind:function Name:ieee80211_chandef_s1g_oper] map[Kind:function Name:ieee80211_chandef_vht_oper] map[Kind:function Name:ieee80211_check_combinations] map[Kind:function Name:ieee80211_clear_tpe] map[Kind:function Name:ieee80211_conn_mode_str] map[Kind:function Name:ieee80211_ctstoself_duration] map[Kind:function Name:ieee80211_dfs_cac_cancel] map[Kind:function Name:ieee80211_dfs_radar_detected_work] map[Kind:function Name:ieee80211_encode_usf] map[Kind:function Name:ieee80211_extend_absent_time] map[Kind:function Name:ieee80211_extend_noa_desc] map[Kind:function Name:ieee80211_fill_ifcomb_params] map[Kind:function Name:ieee80211_flush_completed_scan] map[Kind:function Name:ieee80211_flush_queues] map[Kind:function Name:ieee80211_frame_duration] map[Kind:function Name:ieee80211_generic_frame_duration] map[Kind:function Name:ieee80211_get_adjusted_he_cap] map[Kind:function Name:ieee80211_get_bssid] map[Kind:function Name:ieee80211_get_noa_absent_time] map[Kind:function Name:ieee80211_get_radio_mask] map[Kind:function Name:ieee80211_get_vif_queues] map[Kind:function Name:ieee80211_handle_reconfig_failure] map[Kind:function Name:ieee80211_handle_wake_tx_queue] map[Kind:function Name:ieee80211_hw_restart_disconnect] map[Kind:function Name:ieee80211_ie_build_eht_oper] map[Kind:function Name:ieee80211_ie_build_he_oper] map[Kind:function Name:ieee80211_ie_build_ht_cap] map[Kind:function Name:ieee80211_ie_build_ht_oper] map[Kind:function Name:ieee80211_ie_build_vht_cap] map[Kind:function Name:ieee80211_ie_build_vht_oper] map[Kind:function Name:ieee80211_ie_build_wide_bw_cs] map[Kind:function Name:ieee80211_ie_len_eht_cap] map[Kind:function Name:ieee80211_ie_len_he_cap] map[Kind:function Name:ieee80211_ie_split_vendor] map[Kind:function Name:ieee80211_is_radio_idx_in_scan_req] map[Kind:function Name:ieee80211_iter_max_chans] map[Kind:function Name:ieee80211_iterate_active_interfaces_atomic] map[Kind:function Name:ieee80211_iterate_interfaces] map[Kind:function Name:ieee80211_iterate_stations_atomic] map[Kind:function Name:ieee80211_max_num_channels] map[Kind:function Name:ieee80211_mcs_to_chains] map[Kind:function Name:ieee80211_min_bw_limit_from_chandef] map[Kind:function Name:ieee80211_parse_p2p_noa] map[Kind:function Name:ieee80211_put_eht_cap] map[Kind:function Name:ieee80211_put_he_6ghz_cap] map[Kind:function Name:ieee80211_put_he_cap] map[Kind:function Name:ieee80211_put_preq_ies] map[Kind:function Name:ieee80211_put_preq_ies_band] map[Kind:function Name:ieee80211_put_reg_conn] map[Kind:function Name:ieee80211_put_s1g_cap] map[Kind:function Name:ieee80211_put_srates_elem] map[Kind:function Name:ieee80211_put_uhr_cap] map[Kind:function Name:ieee80211_queue_delayed_work] map[Kind:function Name:ieee80211_queue_stopped] map[Kind:function Name:ieee80211_queue_work] map[Kind:function Name:ieee80211_radar_detected] map[Kind:function Name:ieee80211_radar_mark_chan_ctx_iterator] map[Kind:function Name:ieee80211_recalc_dtim] map[Kind:function Name:ieee80211_recalc_min_chandef] map[Kind:function Name:ieee80211_recalc_sb_count] map[Kind:function Name:ieee80211_recalc_smps] map[Kind:function Name:ieee80211_reconfig] map[Kind:function Name:ieee80211_reconfig_ap_links] map[Kind:function Name:ieee80211_reconfig_disconnect] map[Kind:function Name:ieee80211_reconfig_nan] map[Kind:function Name:ieee80211_reconfig_stations] map[Kind:function Name:ieee80211_regulatory_limit_wmm_params] map[Kind:function Name:ieee80211_resume_disconnect] map[Kind:function Name:ieee80211_rts_duration] map[Kind:function Name:ieee80211_sdata_uses_radio] map[Kind:function Name:ieee80211_send_action_csa] map[Kind:function Name:ieee80211_send_auth] map[Kind:function Name:ieee80211_send_deauth_disassoc] map[Kind:function Name:ieee80211_set_wmm_default] map[Kind:function Name:ieee80211_sta_get_rates] map[Kind:function Name:ieee80211_stop_device] map[Kind:function Name:ieee80211_stop_queue] map[Kind:function Name:ieee80211_stop_queue_by_reason] map[Kind:function Name:ieee80211_stop_queues] map[Kind:function Name:ieee80211_stop_queues_by_reason] map[Kind:function Name:ieee80211_tx_set_protected] map[Kind:function Name:ieee80211_txq_get_depth] map[Kind:function Name:ieee80211_update_p2p_noa] map[Kind:function Name:ieee80211_vif_nan_started] map[Kind:function Name:ieee80211_vif_to_wdev] map[Kind:function Name:ieee80211_wake_queue] map[Kind:function Name:ieee80211_wake_queue_by_reason] map[Kind:function Name:ieee80211_wake_queues] map[Kind:function Name:ieee80211_wake_queues_by_reason] map[Kind:function Name:ieee80211_wake_txqs] map[Kind:function Name:wake_tx_push_queue] map[Kind:function Name:wdev_to_ieee80211_vif] map[Kind:function Name:wiphy_to_ieee80211_hw] map[Kind:global_variable Name:__UNIQUE_ID_addressable___ieee80211_iterate_interfaces_2696] map[Kind:global_variable Name:__UNIQUE_ID_addressable___ieee80211_iterate_stations_2702] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_ave_rssi_2822] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_ctstoself_duration_2663] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_generic_frame_duration_2661] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_handle_wake_tx_queue_2664] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_hw_restart_disconnect_2785] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_iterate_active_interfaces_atomic_2691] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_iterate_interfaces_2690] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_iterate_stations_atomic_2699] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_parse_p2p_noa_2845] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_queue_delayed_work_2706] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_queue_stopped_2684] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_queue_work_2705] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_radar_detected_2832] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_resume_disconnect_2786] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_rts_duration_2662] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_stop_queue_2676] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_stop_queues_2681] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_txq_get_depth_2874] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_update_p2p_noa_2844] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_vif_nan_started_2900] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_vif_to_wdev_2704] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_wake_queue_2673] map[Kind:global_variable Name:__UNIQUE_ID_addressable_ieee80211_wake_queues_2685] map[Kind:global_variable Name:__UNIQUE_ID_addressable_wdev_to_ieee80211_vif_2703] map[Kind:global_variable Name:__UNIQUE_ID_addressable_wiphy_to_ieee80211_hw_2660] map[Kind:global_variable Name:__gendwarfksyms_ptr___ieee80211_iterate_interfaces] map[Kind:global_variable Name:__gendwarfksyms_ptr___ieee80211_iterate_stations] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_ave_rssi] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_ctstoself_duration] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_generic_frame_duration] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_handle_wake_tx_queue] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_hw_restart_disconnect] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_iterate_active_interfaces_atomic] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_iterate_interfaces] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_iterate_stations_atomic] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_parse_p2p_noa] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_queue_delayed_work] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_queue_stopped] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_queue_work] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_radar_detected] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_resume_disconnect] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_rts_duration] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_stop_queue] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_stop_queues] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_txq_get_depth] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_update_p2p_noa] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_vif_nan_started] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_vif_to_wdev] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_wake_queue] map[Kind:global_variable Name:__gendwarfksyms_ptr_ieee80211_wake_queues] map[Kind:global_variable Name:__gendwarfksyms_ptr_wdev_to_ieee80211_vif] map[Kind:global_variable Name:__gendwarfksyms_ptr_wiphy_to_ieee80211_hw] map[Kind:global_variable Name:ieee80211_ac_to_qos_mask] map[Kind:global_variable Name:ieee80211_conn_settings_unlimited] map[Kind:global_variable Name:mac80211_wiphy_privid]]]

gemini-3-flash-preview

							input: 20576
							output: 34
							thoughts: 49
						

Okay, here's my summarized thought process, presented as if I'm navigating this technical task:

**Locating the Definition of `ieee80211_data_to_8023_exthdr`**

Alright, I need to find the definition for `ieee80211_data_to_8023_exthdr`. My initial instinct was that it might be tucked away in `net/mac80211/util.c`, which often holds helper functions related to 802.11 operations, but it's not there. Hmm, that's not uncommon; these things can be spread around.

Now, my next move is to go on a hunt for the declaration. Since this is a core wireless function, and it has "ieee80211" in the name, my intuition is telling me it's probably somewhere in the mac80211 codebase, likely in a file related to data processing or frame conversion. I'll need to use my usual tools to pinpoint its location. I’ll make sure to note down where it's defined and what the surrounding context is - that could offer helpful insights as to how this function is used and any dependencies it has.

map[Expression:ieee80211_data_to_8023_exthdr]

map[Output:include/net/cfg80211.h=7219=unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr);
--
include/net/cfg80211.h-7229-/**
include/net/cfg80211.h:7230: * ieee80211_data_to_8023_exthdr - convert an 802.11 data frame to 802.3
include/net/cfg80211.h-7231- * @skb: the 802.11 data frame
--
include/net/cfg80211.h-7239- */
include/net/cfg80211.h:7240:int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
include/net/cfg80211.h-7241-				  const u8 *addr, enum nl80211_iftype iftype,
--
include/net/cfg80211.h=7251=static inline int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
--
include/net/cfg80211.h-7253-{
include/net/cfg80211.h:7254:	return ieee80211_data_to_8023_exthdr(skb, NULL, addr, iftype, 0, false);
include/net/cfg80211.h-7255-}
--
net/mac80211/rx.c=3119=__ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx, u8 data_offset)
--
net/mac80211/rx.c-3151-
net/mac80211/rx.c:3152:	if (ieee80211_data_to_8023_exthdr(skb, &ethhdr,
net/mac80211/rx.c-3153-					  rx->sdata->vif.addr,
--
net/wireless/util.c=570=EXPORT_SYMBOL(ieee80211_strip_8023_mesh_hdr);
net/wireless/util.c-571-
net/wireless/util.c:572:int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
net/wireless/util.c-573-				  const u8 *addr, enum nl80211_iftype iftype,
--
net/wireless/util.c-650-}
net/wireless/util.c:651:EXPORT_SYMBOL(ieee80211_data_to_8023_exthdr);
net/wireless/util.c-652-
]

gemini-3-flash-preview

							input: 21739
							output: 56
							thoughts: 19
						

Here's my take on the situation:

**Diving into `net/wireless/util.c`**

Okay, so I need to get into `net/wireless/util.c`. That's where I need to start, looking at the code directly. Let's see what's actually going on in there and get a clear picture. Time to dig in.

map[ContextFile:net/wireless/util.c IncludeLines:true Name:ieee80211_data_to_8023_exthdr]

map[SourceCode: 572:	int ieee80211_data_to_8023_exthdr(struct sk_buff *skb, struct ethhdr *ehdr,
 573:					  const u8 *addr, enum nl80211_iftype iftype,
 574:					  u8 data_offset, bool is_amsdu)
 575:	{
 576:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 577:		struct {
 578:			u8 hdr[ETH_ALEN] __aligned(2);
 579:			__be16 proto;
 580:		} payload;
 581:		struct ethhdr tmp;
 582:		u16 hdrlen;
 583:	
 584:		if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
 585:			return -1;
 586:	
 587:		hdrlen = ieee80211_hdrlen(hdr->frame_control) + data_offset;
 588:		if (skb->len < hdrlen)
 589:			return -1;
 590:	
 591:		/* convert IEEE 802.11 header + possible LLC headers into Ethernet
 592:		 * header
 593:		 * IEEE 802.11 address fields:
 594:		 * ToDS FromDS Addr1 Addr2 Addr3 Addr4
 595:		 *   0     0   DA    SA    BSSID n/a
 596:		 *   0     1   DA    BSSID SA    n/a
 597:		 *   1     0   BSSID SA    DA    n/a
 598:		 *   1     1   RA    TA    DA    SA
 599:		 */
 600:		memcpy(tmp.h_dest, ieee80211_get_DA(hdr), ETH_ALEN);
 601:		memcpy(tmp.h_source, ieee80211_get_SA(hdr), ETH_ALEN);
 602:	
 603:		switch (hdr->frame_control &
 604:			cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) {
 605:		case cpu_to_le16(IEEE80211_FCTL_TODS):
 606:			if (unlikely(iftype != NL80211_IFTYPE_AP &&
 607:				     iftype != NL80211_IFTYPE_AP_VLAN &&
 608:				     iftype != NL80211_IFTYPE_P2P_GO))
 609:				return -1;
 610:			break;
 611:		case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS):
 612:			if (unlikely(iftype != NL80211_IFTYPE_MESH_POINT &&
 613:				     iftype != NL80211_IFTYPE_AP_VLAN &&
 614:				     iftype != NL80211_IFTYPE_STATION))
 615:				return -1;
 616:			break;
 617:		case cpu_to_le16(IEEE80211_FCTL_FROMDS):
 618:			if ((iftype != NL80211_IFTYPE_STATION &&
 619:			     iftype != NL80211_IFTYPE_P2P_CLIENT &&
 620:			     iftype != NL80211_IFTYPE_MESH_POINT) ||
 621:			    (is_multicast_ether_addr(tmp.h_dest) &&
 622:			     ether_addr_equal(tmp.h_source, addr)))
 623:				return -1;
 624:			break;
 625:		case cpu_to_le16(0):
 626:			if (iftype != NL80211_IFTYPE_ADHOC &&
 627:			    iftype != NL80211_IFTYPE_STATION &&
 628:			    iftype != NL80211_IFTYPE_OCB)
 629:					return -1;
 630:			break;
 631:		}
 632:	
 633:		if (likely(!is_amsdu && iftype != NL80211_IFTYPE_MESH_POINT &&
 634:			   skb_copy_bits(skb, hdrlen, &payload, sizeof(payload)) == 0 &&
 635:			   ieee80211_get_8023_tunnel_proto(&payload, &tmp.h_proto))) {
 636:			/* remove RFC1042 or Bridge-Tunnel encapsulation */
 637:			hdrlen += ETH_ALEN + 2;
 638:			skb_postpull_rcsum(skb, &payload, ETH_ALEN + 2);
 639:		} else {
 640:			tmp.h_proto = htons(skb->len - hdrlen);
 641:		}
 642:	
 643:		pskb_pull(skb, hdrlen);
 644:	
 645:		if (!ehdr)
 646:			ehdr = skb_push(skb, sizeof(struct ethhdr));
 647:		memcpy(ehdr, &tmp, sizeof(tmp));
 648:	
 649:		return 0;
 650:	}
 SourceFile:net/wireless/util.c]

gemini-3-flash-preview

							input: 23462
							output: 54
							thoughts: 29
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Dissecting that Function Call**

Alright, the code's calling `ieee80211_get_8023_tunnel_proto`. My immediate thought is, let's drill down into that specific function. What's it doing? Given the naming, it's likely responsible for determining the protocol used within an 802.3 tunnel, which immediately makes me think of encapsulation. Is it handling a specific encapsulation like LLC or SNAP, or perhaps interpreting an EtherType? I need to understand its logic for mapping the encapsulated protocol to a specific identifier. Knowing this function's purpose will be crucial to understand the context of this call.

map[ContextFile:net/wireless/util.c IncludeLines:true Name:ieee80211_get_8023_tunnel_proto]

map[SourceCode: 512:	bool ieee80211_get_8023_tunnel_proto(const void *hdr, __be16 *proto)
 513:	{
 514:		const __be16 *hdr_proto = hdr + ETH_ALEN;
 515:	
 516:		if (!(ether_addr_equal(hdr, rfc1042_header) &&
 517:		      *hdr_proto != htons(ETH_P_AARP) &&
 518:		      *hdr_proto != htons(ETH_P_IPX)) &&
 519:		    !ether_addr_equal(hdr, bridge_tunnel_header))
 520:			return false;
 521:	
 522:		*proto = *hdr_proto;
 523:	
 524:		return true;
 525:	}
 SourceFile:net/wireless/util.c]

gemini-3-flash-preview

							input: 23968
							output: 53
							thoughts: 509
						

**Analyzing TDLS Frame Conversion**

Okay, so I'm digging into how these 802.11 frames are converted to 802.3 format using `ieee80211_data_to_8023_exthdr`. I know that if it's a TDLS frame, there's supposed to be a `bridge_tunnel_header`, which I *thought* was a SNAP header with the OUI `00:00:00` and ethertype `0x890d`. But hold on... isn't `bridge_tunnel_header` actually `00:00:f8`? Need to double-check that.

Right, forget that. TDLS frames utilize a specific SNAP header. And that would be with `WLAN_TDLS_SNAP_RFTYPE` set to `0x02`. Got it.

Now, looking at the code in `net/mac80211/rx.c`, specifically lines 3301 through 3310, I see they're handling TDLS frames specifically. The code checks for `ETH_P_TDLS` (which I assume is a predefined value for the ethertype), and then looks at the contents of the `struct ieee80211_tdls_data`. This structure, from what I'm reading, has an `ethhdr`, then `payload_type`, `category`, and `action_code`. The code is verifying some critical fields.

Specifically, the code seems to be validating that `tf->payload_type` is equal to `WLAN_TDLS_SNAP_RFTYPE` and that it's a TDLS frame based on `category` and `action_code` being those defined for TDLS channel switching. Okay, so that makes sense, but now I *really* want to check the definition of `ieee80211_tdls_data` to be certain what's going on there. Gotta be sure about what that structure *actually* looks like to be completely sure.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_tdls_data]

map[SourceCode:1309:	struct ieee80211_tdls_data {
1310:		u8 da[ETH_ALEN];
1311:		u8 sa[ETH_ALEN];
1312:		__be16 ether_type;
1313:		u8 payload_type;
1314:		u8 category;
1315:		u8 action_code;
1316:		union {
1317:			struct {
1318:				u8 dialog_token;
1319:				__le16 capability;
1320:				u8 variable[];
1321:			} __packed setup_req;
1322:			struct {
1323:				__le16 status_code;
1324:				u8 dialog_token;
1325:				__le16 capability;
1326:				u8 variable[];
1327:			} __packed setup_resp;
1328:			struct {
1329:				__le16 status_code;
1330:				u8 dialog_token;
1331:				u8 variable[];
1332:			} __packed setup_cfm;
1333:			struct {
1334:				__le16 reason_code;
1335:				u8 variable[];
1336:			} __packed teardown;
1337:			struct {
1338:				u8 dialog_token;
1339:				u8 variable[];
1340:			} __packed discover_req;
1341:			struct {
1342:				u8 target_channel;
1343:				u8 oper_class;
1344:				u8 variable[];
1345:			} __packed chan_switch_req;
1346:			struct {
1347:				__le16 status_code;
1348:				u8 variable[];
1349:			} __packed chan_switch_resp;
1350:		} u;
1351:	} __packed;
 SourceFile:include/linux/ieee80211.h]

gemini-3-flash-preview

							input: 25559
							output: 31
							thoughts: 568
						

**Analyzing TDLS Channel Switch Processing in mac80211**

Okay, so I've been digging into the TDLS channel switch handling within the mac80211 framework, and it's looking pretty straightforward, at least initially. `da`, `sa`, and `ether_type` align with the `ethhdr` structure, no surprises there.

My initial focus was on the `ieee80211_rx_h_data` function. Specifically, after the `__ieee80211_data_to_8023` transformation, the code checks if `((struct ethhdr *)rx->skb->data)->h_proto` equals `ETH_P_TDLS`. If it does, then it delves into payload-specific fields like `payload_type`, `category`, and crucially, the `action_code`. Only if the `action_code` is `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE` does the code set `skb->protocol = ETH_P_TDLS` and queue the SKB. This is important; if the protocol isn't set to `ETH_P_TDLS`, the SKB won't be picked up by the `ieee80211_process_tdls_channel_switch` worker later on.

I then followed the execution to `ieee80211_iface_work` where the check `if (skb->protocol == cpu_to_be16(ETH_P_TDLS))` is made to determine which handler to send the SKB to.

My primary question now is: Are there any *other* places where `skb->protocol` could be set to `ETH_P_TDLS`? I searched for all instances. Grepping initially returned the known spot from `net/mac80211/rx.c:3311`. I need to be *absolutely* sure that the `skb->protocol` is set ONLY in this one place if we want to ensure only TDLS packets are processed using the dedicated handler. I'm going to look more closely now at every instance of `skb->protocol = .*ETH_P_TDLS` to be certain.

map[Expression:skb->protocol\s*=\s*.*ETH_P_TDLS]

map[Output:net/mac80211/iface.c=1779=static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
--
net/mac80211/iface.c-1798-
net/mac80211/iface.c:1799:		if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
net/mac80211/iface.c-1800-			ieee80211_process_tdls_channel_switch(sdata, skb);
--
net/mac80211/rx.c=3262=ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
--
net/mac80211/rx.c-3310-		     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
net/mac80211/rx.c:3311:			rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
net/mac80211/rx.c-3312-			__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
]

gemini-3-flash-preview

							input: 27007
							output: 53
							thoughts: 141
						

Okay, let's break this down.

**Investigating the ETH_P_TDLS Protocol Assignment in mac80211 RX Path**

Right, so I'm trying to figure out where the `skb->protocol` gets set to `ETH_P_TDLS` in the mac80211 receive path. According to my current understanding, line 3311 in `net/mac80211/rx.c` seems to be the *only* place this happens during the receiving process. That feels a bit too specific, which prompts the question of whether there are any other possible assignments.

Hang on a second... what about `ieee80211_deliver_skb(rx)`? I need to check how that function fits into the picture. Looking at line 3337, I can see that if the frame is *not* a channel switch frame, it proceeds directly to `ieee80211_deliver_skb`. So, that seems like the next logical place to look. I need to dive into that function and understand its behavior to be sure about the setting of `ETH_P_TDLS`.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_deliver_skb]

map[SourceCode:2764:	/*
2765:	 * requires that rx->skb is a frame with ethernet header
2766:	 */
2767:	static void
2768:	ieee80211_deliver_skb(struct ieee80211_rx_data *rx)
2769:	{
2770:		struct ieee80211_sub_if_data *sdata = rx->sdata;
2771:		struct net_device *dev = sdata->dev;
2772:		struct sk_buff *skb, *xmit_skb;
2773:		struct ethhdr *ehdr = (struct ethhdr *) rx->skb->data;
2774:		struct sta_info *dsta;
2775:	
2776:		skb = rx->skb;
2777:		xmit_skb = NULL;
2778:	
2779:		dev_sw_netstats_rx_add(dev, skb->len);
2780:	
2781:		if (rx->sta) {
2782:			/* The seqno index has the same property as needed
2783:			 * for the rx_msdu field, i.e. it is IEEE80211_NUM_TIDS
2784:			 * for non-QoS-data frames. Here we know it's a data
2785:			 * frame, so count MSDUs.
2786:			 */
2787:			u64_stats_update_begin(&rx->link_sta->rx_stats.syncp);
2788:			u64_stats_inc(&rx->link_sta->rx_stats.msdu[rx->seqno_idx]);
2789:			u64_stats_update_end(&rx->link_sta->rx_stats.syncp);
2790:		}
2791:	
2792:		if ((sdata->vif.type == NL80211_IFTYPE_AP ||
2793:		     sdata->vif.type == NL80211_IFTYPE_AP_VLAN) &&
2794:		    !(sdata->flags & IEEE80211_SDATA_DONT_BRIDGE_PACKETS) &&
2795:		    ehdr->h_proto != rx->sdata->control_port_protocol &&
2796:		    (sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->u.vlan.sta)) {
2797:			if (is_multicast_ether_addr(ehdr->h_dest) &&
2798:			    ieee80211_vif_get_num_mcast_if(sdata) != 0) {
2799:				/*
2800:				 * send multicast frames both to higher layers in
2801:				 * local net stack and back to the wireless medium
2802:				 */
2803:				xmit_skb = skb_copy(skb, GFP_ATOMIC);
2804:				if (!xmit_skb)
2805:					net_info_ratelimited("%s: failed to clone multicast frame\n",
2806:							    dev->name);
2807:			} else if (!is_multicast_ether_addr(ehdr->h_dest) &&
2808:				   !ether_addr_equal(ehdr->h_dest, ehdr->h_source)) {
2809:				dsta = sta_info_get(sdata, ehdr->h_dest);
2810:				if (dsta) {
2811:					/*
2812:					 * The destination station is associated to
2813:					 * this AP (in this VLAN), so send the frame
2814:					 * directly to it and do not pass it to local
2815:					 * net stack.
2816:					 */
2817:					xmit_skb = skb;
2818:					skb = NULL;
2819:				}
2820:			}
2821:		}
2822:	
2823:	#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
2824:		if (skb) {
2825:			/* 'align' will only take the values 0 or 2 here since all
2826:			 * frames are required to be aligned to 2-byte boundaries
2827:			 * when being passed to mac80211; the code here works just
2828:			 * as well if that isn't true, but mac80211 assumes it can
2829:			 * access fields as 2-byte aligned (e.g. for ether_addr_equal)
2830:			 */
2831:			int align;
2832:	
2833:			align = (unsigned long)(skb->data + sizeof(struct ethhdr)) & 3;
2834:			if (align) {
2835:				if (WARN_ON(skb_headroom(skb) < 3)) {
2836:					dev_kfree_skb(skb);
2837:					skb = NULL;
2838:				} else {
2839:					u8 *data = skb->data;
2840:					size_t len = skb_headlen(skb);
2841:					skb->data -= align;
2842:					memmove(skb->data, data, len);
2843:					skb_set_tail_pointer(skb, len);
2844:				}
2845:			}
2846:		}
2847:	#endif
2848:	
2849:		if (skb) {
2850:			skb->protocol = eth_type_trans(skb, dev);
2851:			ieee80211_deliver_skb_to_local_stack(skb, rx);
2852:		}
2853:	
2854:		if (xmit_skb) {
2855:			/*
2856:			 * Send to wireless media and increase priority by 256 to
2857:			 * keep the received priority instead of reclassifying
2858:			 * the frame (see cfg80211_classify8021d).
2859:			 */
2860:			xmit_skb->priority += 256;
2861:			xmit_skb->protocol = htons(ETH_P_802_3);
2862:			skb_reset_network_header(xmit_skb);
2863:			skb_reset_mac_header(xmit_skb);
2864:			dev_queue_xmit(xmit_skb);
2865:		}
2866:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 29303
							output: 59
							thoughts: 232
						

**Analyzing the TDLS Frame Delivery Path**

Okay, so I'm tracing the path a TDLS frame takes through the 802.11 stack. `ieee80211_deliver_skb` is the key function here, it seems. My initial thought is that it calls `eth_type_trans(skb, dev)`. That makes sense; `eth_type_trans` is the standard function for determining the Ethernet protocol type based on the Ethernet header. It will, as expected, set `skb->protocol`.

Right, now, if the Ethernet header contains `ETH_P_TDLS`, then `skb->protocol` will be set to `ETH_P_TDLS`. But wait a minute... I remember seeing something about TDLS channel switch frames... oh yeah, if `ieee80211_rx_h_data` *doesn't* identify a TDLS channel switch frame, we end up here in `ieee80211_deliver_skb` anyway. So, even though we check in `ieee80211_rx_h_data`, `ieee80211_deliver_skb` will still call `eth_type_trans` to set `skb->protocol`. This means it will *always* set the protocol based on the Ethernet header, regardless of any earlier TDLS frame handling.

After this, `ieee80211_deliver_skb` calls `ieee80211_deliver_skb_to_local_stack(skb, rx)`. This seems to be the critical next step. The question is, what happens after? Does this function, `ieee80211_deliver_skb_to_local_stack`, queue the frame to the iface worker? I'll need to check the source code to confirm that. That's the next logical step in determining where it goes from here. I need to understand if the frame is correctly enqueued and processed, or if the TDLS handling is bypassed due to this chain of calls.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_deliver_skb_to_local_stack]

map[SourceCode:2717:	static void ieee80211_deliver_skb_to_local_stack(struct sk_buff *skb,
2718:							 struct ieee80211_rx_data *rx)
2719:	{
2720:		struct ieee80211_sub_if_data *sdata = rx->sdata;
2721:		struct net_device *dev = sdata->dev;
2722:	
2723:		if (unlikely((skb->protocol == sdata->control_port_protocol ||
2724:			     (skb->protocol == cpu_to_be16(ETH_P_PREAUTH) &&
2725:			      !sdata->control_port_no_preauth)) &&
2726:			     sdata->control_port_over_nl80211)) {
2727:			struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
2728:			bool noencrypt = !(status->flag & RX_FLAG_DECRYPTED);
2729:	
2730:			cfg80211_rx_control_port(dev, skb, noencrypt, rx->link_id);
2731:			dev_kfree_skb(skb);
2732:		} else {
2733:			struct ethhdr *ehdr = (void *)skb_mac_header(skb);
2734:	
2735:			memset(skb->cb, 0, sizeof(skb->cb));
2736:	
2737:			/*
2738:			 * 802.1X over 802.11 requires that the authenticator address
2739:			 * be used for EAPOL frames. However, 802.1X allows the use of
2740:			 * the PAE group address instead. If the interface is part of
2741:			 * a bridge and we pass the frame with the PAE group address,
2742:			 * then the bridge will forward it to the network (even if the
2743:			 * client was not associated yet), which isn't supposed to
2744:			 * happen.
2745:			 * To avoid that, rewrite the destination address to our own
2746:			 * address, so that the authenticator (e.g. hostapd) will see
2747:			 * the frame, but bridge won't forward it anywhere else. Note
2748:			 * that due to earlier filtering, the only other address can
2749:			 * be the PAE group address, unless the hardware allowed them
2750:			 * through in 802.3 offloaded mode.
2751:			 */
2752:			if (unlikely(skb->protocol == sdata->control_port_protocol &&
2753:				     !ether_addr_equal(ehdr->h_dest, sdata->vif.addr)))
2754:				ether_addr_copy(ehdr->h_dest, sdata->vif.addr);
2755:	
2756:			/* deliver to local stack */
2757:			if (rx->list)
2758:				list_add_tail(&skb->list, rx->list);
2759:			else
2760:				netif_receive_skb(skb);
2761:		}
2762:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 30980
							output: 36
							thoughts: 89
						

Okay, here's my interpretation of this networking flow, as if I'm thinking through the steps:

**Analyzing the Packet Reception Path**

Alright, so the incoming packet, represented by the `skb`, gets passed to `netif_receive_skb(skb)`. That's the standard entry point into the kernel's networking stack, so far, so good. Now, this is important: this isn't immediately handled by the mac80211 interface worker. It's a general networking path. The implication is, at least initially, the mac80211 layer isn't the direct consumer of this initial process.

My understanding is, the mac80211 interface worker is responsible for handling frames that have been *queued* to `sdata->skb_queue`. Therefore, it must mean that some other routine must be responsible for queueing the `skb` to `sdata->skb_queue`. I need to understand this better. To follow this, I need to know where and how frames get queued into this structure. I'll need to figure out which function is ultimately calling `__ieee80211_queue_skb_to_iface`. That's the next step to follow to understand this flow completely.

map[Name:__ieee80211_queue_skb_to_iface]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_queue_skb_to_iface SourceFile:net/mac80211/rx.c SourceLine:261] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_h_data SourceFile:net/mac80211/rx.c SourceLine:3312]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 31531
							output: 35
							thoughts: 21
						

Okay, here's my interpretation of that thought, summarized in the first person, assuming an expert audience:

**Diving into the 802.11 Queueing Mechanics**

Right, so we're looking at the core of wireless networking here. We've got this packet, this *SKB*, and it needs to hit the air. I'm thinking about the fundamental process – how does it actually get from the kernel, down to the radio? Specifically, what's happening internally with `ieee80211_queue_skb_to_iface`? That function, it's the gatekeeper, isn't it? It's where the rubber meets the road between the network stack and the 802.11 interface.

I need to quickly recall how that function handles things. Is it just adding the SKB to a local queue? Are there immediate priority considerations it's making? What about backpressure – does it check for available transmit descriptors, or is that handled later? What about the different ACs (Access Categories) and how they're mapped onto specific hardware queues? I'm picturing the internal data structures, the locking mechanisms. Are there any potential race conditions I should be aware of, especially in a heavily loaded environment?

It's crucial to understand this exact point to optimize wireless performance and troubleshoot any issues in this area. It will tell me whether there are any potential bottlenecks in transmitting packets. I need to refresh my memory on the interactions here, this seems important to the task at hand.

map[Name:ieee80211_queue_skb_to_iface]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_handle_mu_mimo_mon SourceFile:net/mac80211/rx.c SourceLine:304] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_h_action SourceFile:net/mac80211/rx.c SourceLine:3959] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_h_ext SourceFile:net/mac80211/rx.c SourceLine:4116] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_h_mgmt SourceFile:net/mac80211/rx.c SourceLine:4173] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_rx_reorder_ampdu SourceFile:net/mac80211/rx.c SourceLine:1499]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 32255
							output: 54
							thoughts: 287
						

**TDLS Frame Handling Discrepancy**

Okay, so I'm digging into how TDLS frames are processed, and I've hit a potential snag. I was looking at `ieee80211_rx_h_mgmt` and `ieee80211_rx_h_action`, realizing they also queue frames to the iface worker, but my focus is specifically on TDLS. These TDLS frames I'm concerned about are, ultimately, DATA frames, encapsulated inside of standard 802.11 data frames, so `ieee80211_rx_h_data` is the relevant handler.

Now, I remember the code checks for `ETH_P_TDLS` within the data frame and only queues the frame if it pertains to channel switch request/response. But here’s the rub, what about *management* frames? TDLS Setup Request/Response/Confirm *are* Action frames – specifically, they fall under the TDLS category. But the `ieee80211_process_tdls_channel_switch` function, the ultimate destination for this data, *expects* an Ethernet header at the beginning of the skb. It casts `skb->data` to `struct ieee80211_tdls_data`, which has that structure including `da`, `sa`, `ether_type`, etc.

The issue is that management frames in mac80211 are *typically not* converted to Ethernet headers when they get queued to the iface worker. This is where things get tricky. I need to double-check `ieee80211_rx_h_mgmt` and `ieee80211_rx_h_action` to confirm this assumption and figure out if there's a disconnect in how these frames are handled and passed to the TDLS channel switch process. We're looking at a potential mismatch between the frame format expected by the channel switch handler and the format of the management frames being queued.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_h_action]

map[SourceCode:3601:	static ieee80211_rx_result debug_noinline
3602:	ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
3603:	{
3604:		struct ieee80211_local *local = rx->local;
3605:		struct ieee80211_sub_if_data *sdata = rx->sdata;
3606:		struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
3607:		struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
3608:		int len = rx->skb->len;
3609:	
3610:		if (!ieee80211_is_action(mgmt->frame_control))
3611:			return RX_CONTINUE;
3612:	
3613:		if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC &&
3614:		    mgmt->u.action.category != WLAN_CATEGORY_SELF_PROTECTED &&
3615:		    mgmt->u.action.category != WLAN_CATEGORY_SPECTRUM_MGMT)
3616:			return RX_DROP_U_ACTION_UNKNOWN_SRC;
3617:	
3618:		switch (mgmt->u.action.category) {
3619:		case WLAN_CATEGORY_HT:
3620:			/* reject HT action frames from stations not supporting HT
3621:			 * or not HE Capable
3622:			 */
3623:			if (!rx->link_sta->pub->ht_cap.ht_supported &&
3624:			    !rx->link_sta->pub->he_cap.has_he)
3625:				goto invalid;
3626:	
3627:			if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3628:			    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3629:			    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3630:			    sdata->vif.type != NL80211_IFTYPE_AP &&
3631:			    sdata->vif.type != NL80211_IFTYPE_ADHOC)
3632:				break;
3633:	
3634:			/* verify action & smps_control/chanwidth are present */
3635:			if (len < IEEE80211_MIN_ACTION_SIZE + 2)
3636:				goto invalid;
3637:	
3638:			switch (mgmt->u.action.u.ht_smps.action) {
3639:			case WLAN_HT_ACTION_SMPS: {
3640:				struct ieee80211_supported_band *sband;
3641:				enum ieee80211_smps_mode smps_mode;
3642:				struct sta_opmode_info sta_opmode = {};
3643:	
3644:				if (sdata->vif.type != NL80211_IFTYPE_AP &&
3645:				    sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
3646:					goto handled;
3647:	
3648:				/* convert to HT capability */
3649:				switch (mgmt->u.action.u.ht_smps.smps_control) {
3650:				case WLAN_HT_SMPS_CONTROL_DISABLED:
3651:					smps_mode = IEEE80211_SMPS_OFF;
3652:					break;
3653:				case WLAN_HT_SMPS_CONTROL_STATIC:
3654:					smps_mode = IEEE80211_SMPS_STATIC;
3655:					break;
3656:				case WLAN_HT_SMPS_CONTROL_DYNAMIC:
3657:					smps_mode = IEEE80211_SMPS_DYNAMIC;
3658:					break;
3659:				default:
3660:					goto invalid;
3661:				}
3662:	
3663:				/* if no change do nothing */
3664:				if (rx->link_sta->pub->smps_mode == smps_mode)
3665:					goto handled;
3666:				rx->link_sta->pub->smps_mode = smps_mode;
3667:				sta_opmode.smps_mode =
3668:					ieee80211_smps_mode_to_smps_mode(smps_mode);
3669:				sta_opmode.changed = STA_OPMODE_SMPS_MODE_CHANGED;
3670:	
3671:				sband = rx->local->hw.wiphy->bands[status->band];
3672:	
3673:				rate_control_rate_update(local, sband, rx->link_sta,
3674:							 IEEE80211_RC_SMPS_CHANGED);
3675:				cfg80211_sta_opmode_change_notify(sdata->dev,
3676:								  rx->sta->addr,
3677:								  &sta_opmode,
3678:								  GFP_ATOMIC);
3679:				goto handled;
3680:			}
3681:			case WLAN_HT_ACTION_NOTIFY_CHANWIDTH: {
3682:				u8 chanwidth = mgmt->u.action.u.ht_notify_cw.chanwidth;
3683:	
3684:				if (chanwidth != IEEE80211_HT_CHANWIDTH_20MHZ &&
3685:				    chanwidth != IEEE80211_HT_CHANWIDTH_ANY)
3686:					goto invalid;
3687:	
3688:				/* If it doesn't support 40 MHz it can't change ... */
3689:				if (!(rx->link_sta->pub->ht_cap.cap &
3690:					IEEE80211_HT_CAP_SUP_WIDTH_20_40))
3691:					goto handled;
3692:	
3693:				goto queue;
3694:			}
3695:			default:
3696:				goto invalid;
3697:			}
3698:	
3699:			break;
3700:		case WLAN_CATEGORY_PUBLIC:
3701:		case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION:
3702:			if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3703:				goto invalid;
3704:			if (sdata->vif.type != NL80211_IFTYPE_STATION)
3705:				break;
3706:			if (!rx->sta)
3707:				break;
3708:			if (!ether_addr_equal(mgmt->bssid, sdata->deflink.u.mgd.bssid))
3709:				break;
3710:			if (mgmt->u.action.u.ext_chan_switch.action_code !=
3711:					WLAN_PUB_ACTION_EXT_CHANSW_ANN)
3712:				break;
3713:			if (len < offsetof(struct ieee80211_mgmt,
3714:					   u.action.u.ext_chan_switch.variable))
3715:				goto invalid;
3716:			goto queue;
3717:		case WLAN_CATEGORY_VHT:
3718:			if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3719:			    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3720:			    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3721:			    sdata->vif.type != NL80211_IFTYPE_AP &&
3722:			    sdata->vif.type != NL80211_IFTYPE_ADHOC)
3723:				break;
3724:	
3725:			/* verify action code is present */
3726:			if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3727:				goto invalid;
3728:	
3729:			switch (mgmt->u.action.u.vht_opmode_notif.action_code) {
3730:			case WLAN_VHT_ACTION_OPMODE_NOTIF: {
3731:				/* verify opmode is present */
3732:				if (len < IEEE80211_MIN_ACTION_SIZE + 2)
3733:					goto invalid;
3734:				goto queue;
3735:			}
3736:			case WLAN_VHT_ACTION_GROUPID_MGMT: {
3737:				if (len < IEEE80211_MIN_ACTION_SIZE + 25)
3738:					goto invalid;
3739:				goto queue;
3740:			}
3741:			default:
3742:				break;
3743:			}
3744:			break;
3745:		case WLAN_CATEGORY_BACK:
3746:			if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3747:			    sdata->vif.type != NL80211_IFTYPE_MESH_POINT &&
3748:			    sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
3749:			    sdata->vif.type != NL80211_IFTYPE_AP &&
3750:			    sdata->vif.type != NL80211_IFTYPE_ADHOC)
3751:				break;
3752:	
3753:			/* verify action_code is present */
3754:			if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3755:				break;
3756:	
3757:			switch (mgmt->u.action.u.addba_req.action_code) {
3758:			case WLAN_ACTION_ADDBA_REQ:
3759:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3760:					   sizeof(mgmt->u.action.u.addba_req)))
3761:					goto invalid;
3762:				break;
3763:			case WLAN_ACTION_ADDBA_RESP:
3764:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3765:					   sizeof(mgmt->u.action.u.addba_resp)))
3766:					goto invalid;
3767:				break;
3768:			case WLAN_ACTION_DELBA:
3769:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3770:					   sizeof(mgmt->u.action.u.delba)))
3771:					goto invalid;
3772:				break;
3773:			default:
3774:				goto invalid;
3775:			}
3776:	
3777:			goto queue;
3778:		case WLAN_CATEGORY_SPECTRUM_MGMT:
3779:			/* verify action_code is present */
3780:			if (len < IEEE80211_MIN_ACTION_SIZE + 1)
3781:				break;
3782:	
3783:			switch (mgmt->u.action.u.measurement.action_code) {
3784:			case WLAN_ACTION_SPCT_MSR_REQ:
3785:				if (status->band != NL80211_BAND_5GHZ)
3786:					break;
3787:	
3788:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3789:					   sizeof(mgmt->u.action.u.measurement)))
3790:					break;
3791:	
3792:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3793:					break;
3794:	
3795:				ieee80211_process_measurement_req(sdata, mgmt, len);
3796:				goto handled;
3797:			case WLAN_ACTION_SPCT_CHL_SWITCH: {
3798:				u8 *bssid;
3799:				if (len < (IEEE80211_MIN_ACTION_SIZE +
3800:					   sizeof(mgmt->u.action.u.chan_switch)))
3801:					break;
3802:	
3803:				if (sdata->vif.type != NL80211_IFTYPE_STATION &&
3804:				    sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3805:				    sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3806:					break;
3807:	
3808:				if (sdata->vif.type == NL80211_IFTYPE_STATION)
3809:					bssid = sdata->deflink.u.mgd.bssid;
3810:				else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
3811:					bssid = sdata->u.ibss.bssid;
3812:				else if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
3813:					bssid = mgmt->sa;
3814:				else
3815:					break;
3816:	
3817:				if (!ether_addr_equal(mgmt->bssid, bssid))
3818:					break;
3819:	
3820:				goto queue;
3821:				}
3822:			}
3823:			break;
3824:		case WLAN_CATEGORY_SELF_PROTECTED:
3825:			if (len < (IEEE80211_MIN_ACTION_SIZE +
3826:				   sizeof(mgmt->u.action.u.self_prot.action_code)))
3827:				break;
3828:	
3829:			switch (mgmt->u.action.u.self_prot.action_code) {
3830:			case WLAN_SP_MESH_PEERING_OPEN:
3831:			case WLAN_SP_MESH_PEERING_CLOSE:
3832:			case WLAN_SP_MESH_PEERING_CONFIRM:
3833:				if (!ieee80211_vif_is_mesh(&sdata->vif))
3834:					goto invalid;
3835:				if (sdata->u.mesh.user_mpm)
3836:					/* userspace handles this frame */
3837:					break;
3838:				goto queue;
3839:			case WLAN_SP_MGK_INFORM:
3840:			case WLAN_SP_MGK_ACK:
3841:				if (!ieee80211_vif_is_mesh(&sdata->vif))
3842:					goto invalid;
3843:				break;
3844:			}
3845:			break;
3846:		case WLAN_CATEGORY_MESH_ACTION:
3847:			if (len < (IEEE80211_MIN_ACTION_SIZE +
3848:				   sizeof(mgmt->u.action.u.mesh_action.action_code)))
3849:				break;
3850:	
3851:			if (!ieee80211_vif_is_mesh(&sdata->vif))
3852:				break;
3853:			if (mesh_action_is_path_sel(mgmt) &&
3854:			    !mesh_path_sel_is_hwmp(sdata))
3855:				break;
3856:			goto queue;
3857:		case WLAN_CATEGORY_S1G:
3858:			if (len < offsetofend(typeof(*mgmt),
3859:					      u.action.u.s1g.action_code))
3860:				break;
3861:	
3862:			switch (mgmt->u.action.u.s1g.action_code) {
3863:			case WLAN_S1G_TWT_SETUP:
3864:			case WLAN_S1G_TWT_TEARDOWN:
3865:				if (ieee80211_process_rx_twt_action(rx))
3866:					goto queue;
3867:				break;
3868:			default:
3869:				break;
3870:			}
3871:			break;
3872:		case WLAN_CATEGORY_PROTECTED_EHT:
3873:			if (len < offsetofend(typeof(*mgmt),
3874:					      u.action.u.ttlm_req.action_code))
3875:				break;
3876:	
3877:			switch (mgmt->u.action.u.ttlm_req.action_code) {
3878:			case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ:
3879:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3880:					break;
3881:	
3882:				if (len < offsetofend(typeof(*mgmt),
3883:						      u.action.u.ttlm_req))
3884:					goto invalid;
3885:				goto queue;
3886:			case WLAN_PROTECTED_EHT_ACTION_TTLM_RES:
3887:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3888:					break;
3889:	
3890:				if (len < offsetofend(typeof(*mgmt),
3891:						      u.action.u.ttlm_res))
3892:					goto invalid;
3893:				goto queue;
3894:			case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN:
3895:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3896:					break;
3897:	
3898:				if (len < offsetofend(typeof(*mgmt),
3899:						      u.action.u.ttlm_tear_down))
3900:					goto invalid;
3901:				goto queue;
3902:			case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP:
3903:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3904:					break;
3905:	
3906:				/* The reconfiguration response action frame must
3907:				 * least one 'Status Duple' entry (3 octets)
3908:				 */
3909:				if (len <
3910:				    offsetofend(typeof(*mgmt),
3911:						u.action.u.ml_reconf_resp) + 3)
3912:					goto invalid;
3913:				goto queue;
3914:			case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP:
3915:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3916:					break;
3917:	
3918:				if (len < offsetofend(typeof(*mgmt),
3919:						      u.action.u.epcs) +
3920:				    IEEE80211_EPCS_ENA_RESP_BODY_LEN)
3921:					goto invalid;
3922:				goto queue;
3923:			case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN:
3924:				if (sdata->vif.type != NL80211_IFTYPE_STATION)
3925:					break;
3926:	
3927:				if (len < offsetofend(typeof(*mgmt),
3928:						      u.action.u.epcs))
3929:					goto invalid;
3930:				goto queue;
3931:			case WLAN_PROTECTED_EHT_ACTION_EML_OP_MODE_NOTIF:
3932:				if (sdata->vif.type != NL80211_IFTYPE_AP)
3933:					break;
3934:	
3935:				if (len < offsetofend(typeof(*mgmt),
3936:						      u.action.u.eml_omn))
3937:					goto invalid;
3938:				goto queue;
3939:			default:
3940:				break;
3941:			}
3942:			break;
3943:		}
3944:	
3945:		return RX_CONTINUE;
3946:	
3947:	 invalid:
3948:		status->rx_flags |= IEEE80211_RX_MALFORMED_ACTION_FRM;
3949:		/* will return in the next handlers */
3950:		return RX_CONTINUE;
3951:	
3952:	 handled:
3953:		if (rx->sta)
3954:			rx->link_sta->rx_stats.packets++;
3955:		dev_kfree_skb(rx->skb);
3956:		return RX_QUEUED;
3957:	
3958:	 queue:
3959:		ieee80211_queue_skb_to_iface(sdata, rx->link_id, rx->sta, rx->skb);
3960:		return RX_QUEUED;
3961:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 39087
							output: 58
							thoughts: 1040
						

**TDLS Channel Switch Frame Handling in mac80211**

Okay, so I'm diving into how mac80211 handles TDLS channel switch frames. My initial thought was that `ieee80211_rx_h_action` might be the place, but after a quick check, it doesn't seem to account for `WLAN_CATEGORY_TDLS` in its switch statement. That's a red flag.

Then I recalled that TDLS management frames can be sent either as standalone "Action" frames or encapsulated in Data frames. According to 802.11-2012, both are valid. It appears mac80211 is going the encapsulated data frame route for channel switches.

Now, looking at `ieee80211_process_tdls_channel_switch`, I see it's expecting an `ieee80211_tdls_data` structure starting with an Ethernet header. Specifically, it's accessing `skb->data`, which means the frame should be Ethernet-encapsulated at this point.

The key then lies in where the frame gets Ethernet-ified. I remembered `ieee80211_rx_h_data` does this: it sets `rx->skb->protocol = cpu_to_be16(ETH_P_TDLS)` and then queues the SKB using `__ieee80211_queue_skb_to_iface`. That's the conversion point. If the `tf->action_code` is not the channel switch request or response, it isn't queued here.

So, the question is, is there any *other* place where `skb->protocol` is set to `ETH_P_TDLS`? I searched, and it's looking like `rx.c` is the only place it's explicitly set.

Wait, what about `ieee80211_iface_work`? This function processes the queue. If `skb->protocol` is `ETH_P_TDLS`, it's processed there.

I'm starting to piece it together. `sdata->skb_queue` is populated by `__ieee80211_queue_skb_to_iface` which in turn is called by several places. I checked the callers of `__ieee80211_queue_skb_to_iface` and `ieee80211_queue_skb_to_iface`.

`ieee80211_queue_skb_to_iface` is called by several functions, including `ieee80211_rx_h_action`, but not all of them set the protocol. Management frames typically don't.

Now, I'm going to look at `ieee80211_queue_skb_to_iface` itself to confirm this. The puzzle's almost complete, I think.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_queue_skb_to_iface]

map[SourceCode: 255:	static void ieee80211_queue_skb_to_iface(struct ieee80211_sub_if_data *sdata,
 256:						 int link_id,
 257:						 struct sta_info *sta,
 258:						 struct sk_buff *skb)
 259:	{
 260:		skb->protocol = 0;
 261:		__ieee80211_queue_skb_to_iface(sdata, link_id, sta, skb);
 262:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 41036
							output: 38
							thoughts: 2735
						

**Analysis of TDLS Channel Switch Vulnerability**

Okay, so I'm diving into this TDLS channel switch issue. It looks like the kernel is hitting a `WARN_ON_ONCE(1)` in `ieee80211_process_tdls_channel_switch`. The core of the problem seems to stem from how the `skb->protocol` and `tf->action_code` are handled in conjunction with packet linearization.

My initial thought is that if `skb->protocol` isn't `ETH_P_TDLS`, then `ieee80211_process_tdls_channel_switch` shouldn't even be called. The only place I'm seeing `skb->protocol` being set to `ETH_P_TDLS` is in `ieee80211_rx_h_data`, but it appears there is a check on `tf->action_code` before that is called, which should make it impossible to reach the default case.

Then, I started wondering if `tf->action_code` could change *after* the initial check and before the function. This brought up a potential race condition. However, the skb is queued using the `sdata->skb_queue`. I think this should be a freshly received skb, so it should be fine. I'm assuming the driver is not going to modify `tf->action_code`, although that is a point that could be confirmed with deeper investigation.

I went back and checked all the places that call `__ieee80211_queue_skb_to_iface`. There are only two, one where `skb->protocol` is set to 0, which would not trigger the critical code, and one where `skb->protocol` is set to `ETH_P_TDLS`. That one is the one I suspect.

Then, I'm focusing on the `WARN_ON_ONCE(1)` in the `default` case of the switch statement. If we reach this point, `skb->protocol` *must* be `ETH_P_TDLS`, and the frame would have to have been queued through `ieee80211_rx_h_data`. Also, that function has a check on `tf->action_code` to make sure it is of the right type before it sets the protocol, so it seems impossible.

However, I started thinking about `skb_linearize`. The `tf` pointer is assigned *before* `skb_linearize` is called. If the skb is fragmented, `skb_linearize` might reallocate the buffer. This would mean that `tf` is now a dangling pointer, pointing to the old buffer. This is a classic Use-After-Free scenario! Accessing `tf->action_code` after `skb_linearize` could be reading garbage, which could then land us in the `default` case and trigger the warning. This seems like a critical bug!

I need to confirm if `skb_linearize` really does reallocate and if `tf` is not re-assigned after that call. If `skb_linearize` reallocates, `tf` is a dangling pointer, and we're looking at a Use-After-Free vulnerability. I'll need to check the code to be sure the pointer is not re-assigned.

So, in the version of the code that I'm looking at, `tf` is assigned before `skb_linearize`, and it is *not* re-assigned after. This is a bug! This likely explains the warning and potentially the vulnerability. A crafted fragmented TDLS frame could potentially be used by an attacker to trigger this. I am going to need to track down the change history for this section of code.

git log timed out. Please specify a tighter search scope (e.g. by providing a PathPrefix).

map[CodeRegexp:ieee80211_process_tdls_channel_switch Count:10]

map[Output:]

gemini-3-flash-preview

							input: 44666
							output: 34
							thoughts: 13
						

Here's my attempt at summarizing the thought process, tailored for an expert audience:

**Investigating `git log` with `PathPrefix`**

Okay, so I'm thinking about how to refine my `git log` queries. I've been using it a lot, but I'm looking for more targeted information. My immediate thought is, let's explore the `PathPrefix` option. I know it exists; it feels like it could be the key to focusing the output on a specific directory or file within the repository. I need to quickly filter the output to see only commits that touched something in a particular section. Time to test this, see if this is going to be the efficient tool I think it could be.

map[Count:10 PathPrefix:net/mac80211/tdls.c]

map[Output:7d73872d949c wifi: mac80211: check tdls flag in ieee80211_tdls_oper
68eb1b791ac8 wifi: mac80211: pass frame type to element parsing
16ecdab5446f wifi: mac80211: reject TDLS operations when station is not associated
996c15bd30a9 wifi: cfg80211/mac80211: remove more 5/10 MHz code
88b67e91e292 wifi: mac80211: call rate_control_rate_update() for link STA
85977fc0aa48 wifi: mac80211: remove TDLS peers only on affected link
ea8af8be4232 wifi: mac80211: convert ieee80211_ie_build_eht_cap() to SKB use
28aa895bb0b3 wifi: mac80211: convert ieee80211_ie_build_he_cap() to SKB use
147ceae20534 wifi: mac80211: simplify adding supported rates
e0b5ee918723 wifi: mac80211: tdls: use ieee80211_put_he_6ghz_cap()
]

gemini-3-flash-preview

							input: 45220
							output: 60
							thoughts: 265
						

**Analyzing Potential UAF Fixes**

Alright, none of these potential solutions I'm reviewing seem to directly address the use-after-free vulnerability within `ieee80211_process_tdls_channel_switch`. Let's circle back to that `WARN_ON_ONCE(1)` statement, specifically this block:

```c
2032:		default:
2033:			WARN_ON_ONCE(1);
2034:			return;
```

Hold on, before I dive into the general error handling, I need to check something related to those `case` statements. I need to make sure that `tf` isn't used after `skb_linearize` in those `case` blocks as well. It's a key detail to watch for:

```c
2026:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
2027:			ieee80211_process_tdls_channel_switch_req(sdata, skb);
2028:			break;
2029:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
2030:			ieee80211_process_tdls_channel_switch_resp(sdata, skb);
2031:			break;
```

Okay, let's start by digging into `ieee80211_process_tdls_channel_switch_req`. That function is probably a good place to start my investigation.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_process_tdls_channel_switch_req]

map[SourceCode:1840:	static int
1841:	ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
1842:						  struct sk_buff *skb)
1843:	{
1844:		struct ieee80211_local *local = sdata->local;
1845:		struct ieee802_11_elems *elems;
1846:		struct cfg80211_chan_def chandef;
1847:		struct ieee80211_channel *chan;
1848:		enum nl80211_channel_type chan_type;
1849:		int freq;
1850:		u8 target_channel, oper_class;
1851:		bool local_initiator;
1852:		struct sta_info *sta;
1853:		enum nl80211_band band;
1854:		struct ieee80211_tdls_data *tf = (void *)skb->data;
1855:		struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1856:		int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable);
1857:		struct ieee80211_tdls_ch_sw_params params = {};
1858:		int ret = 0;
1859:	
1860:		lockdep_assert_wiphy(local->hw.wiphy);
1861:	
1862:		params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
1863:		params.timestamp = rx_status->device_timestamp;
1864:	
1865:		if (skb->len < baselen) {
1866:			tdls_dbg(sdata, "TDLS channel switch req too short: %d\n",
1867:				 skb->len);
1868:			return -EINVAL;
1869:		}
1870:	
1871:		target_channel = tf->u.chan_switch_req.target_channel;
1872:		oper_class = tf->u.chan_switch_req.oper_class;
1873:	
1874:		/*
1875:		 * We can't easily infer the channel band. The operating class is
1876:		 * ambiguous - there are multiple tables (US/Europe/JP/Global). The
1877:		 * solution here is to treat channels with number >14 as 5GHz ones,
1878:		 * and specifically check for the (oper_class, channel) combinations
1879:		 * where this doesn't hold. These are thankfully unique according to
1880:		 * IEEE802.11-2012.
1881:		 * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as
1882:		 * valid here.
1883:		 */
1884:		if ((oper_class == 112 || oper_class == 2 || oper_class == 3 ||
1885:		     oper_class == 4 || oper_class == 5 || oper_class == 6) &&
1886:		     target_channel < 14)
1887:			band = NL80211_BAND_5GHZ;
1888:		else
1889:			band = target_channel < 14 ? NL80211_BAND_2GHZ :
1890:						     NL80211_BAND_5GHZ;
1891:	
1892:		freq = ieee80211_channel_to_frequency(target_channel, band);
1893:		if (freq == 0) {
1894:			tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n",
1895:				 target_channel);
1896:			return -EINVAL;
1897:		}
1898:	
1899:		chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
1900:		if (!chan) {
1901:			tdls_dbg(sdata,
1902:				 "Unsupported channel for TDLS chan switch: %d\n",
1903:				 target_channel);
1904:			return -EINVAL;
1905:		}
1906:	
1907:		elems = ieee802_11_parse_elems(tf->u.chan_switch_req.variable,
1908:					       skb->len - baselen,
1909:					       IEEE80211_FTYPE_MGMT |
1910:					       IEEE80211_STYPE_ACTION,
1911:					       NULL);
1912:		if (!elems)
1913:			return -ENOMEM;
1914:	
1915:		if (elems->parse_error) {
1916:			tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n");
1917:			ret = -EINVAL;
1918:			goto free;
1919:		}
1920:	
1921:		if (!elems->ch_sw_timing || !elems->lnk_id) {
1922:			tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n");
1923:			ret = -EINVAL;
1924:			goto free;
1925:		}
1926:	
1927:		if (!elems->sec_chan_offs) {
1928:			chan_type = NL80211_CHAN_HT20;
1929:		} else {
1930:			switch (elems->sec_chan_offs->sec_chan_offs) {
1931:			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1932:				chan_type = NL80211_CHAN_HT40PLUS;
1933:				break;
1934:			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1935:				chan_type = NL80211_CHAN_HT40MINUS;
1936:				break;
1937:			default:
1938:				chan_type = NL80211_CHAN_HT20;
1939:				break;
1940:			}
1941:		}
1942:	
1943:		cfg80211_chandef_create(&chandef, chan, chan_type);
1944:	
1945:		/* we will be active on the TDLS link */
1946:		if (!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &chandef,
1947:						   sdata->wdev.iftype)) {
1948:			tdls_dbg(sdata, "TDLS chan switch to forbidden channel\n");
1949:			ret = -EINVAL;
1950:			goto free;
1951:		}
1952:	
1953:		sta = sta_info_get(sdata, tf->sa);
1954:		if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
1955:			tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
1956:				 tf->sa);
1957:			ret = -EINVAL;
1958:			goto out;
1959:		}
1960:	
1961:		params.sta = &sta->sta;
1962:	
1963:		/* validate the initiator is set correctly */
1964:		local_initiator =
1965:			!memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
1966:		if (local_initiator == sta->sta.tdls_initiator) {
1967:			tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
1968:			ret = -EINVAL;
1969:			goto out;
1970:		}
1971:	
1972:		/* peer should have known better */
1973:		if (!sta->sta.deflink.ht_cap.ht_supported && elems->sec_chan_offs &&
1974:		    elems->sec_chan_offs->sec_chan_offs) {
1975:			tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n");
1976:			ret = -EOPNOTSUPP;
1977:			goto out;
1978:		}
1979:	
1980:		params.chandef = &chandef;
1981:		params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time);
1982:		params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout);
1983:	
1984:		params.tmpl_skb =
1985:			ieee80211_tdls_ch_sw_resp_tmpl_get(sta,
1986:							   &params.ch_sw_tm_ie);
1987:		if (!params.tmpl_skb) {
1988:			ret = -ENOENT;
1989:			goto out;
1990:		}
1991:	
1992:		drv_tdls_recv_channel_switch(sdata->local, sdata, &params);
1993:	
1994:		tdls_dbg(sdata,
1995:			 "TDLS ch switch request received from %pM ch %d width %d\n",
1996:			 tf->sa, params.chandef->chan->center_freq,
1997:			 params.chandef->width);
1998:	out:
1999:		dev_kfree_skb_any(params.tmpl_skb);
2000:	free:
2001:		kfree(elems);
2002:		return ret;
2003:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 48718
							output: 43
							thoughts: 1388
						

**Vulnerability Analysis of TDLS Channel Switch Processing**

Okay, let's break this down. I'm looking at the `ieee80211_process_tdls_channel_switch_req` function and how it handles TDLS channel switch requests. My initial concern is with how the `tf` pointer is used. It's assigned from `skb->data` at the beginning of the function and then used throughout.

The potential issue I see immediately is that if the calling function, `ieee80211_process_tdls_channel_switch`, calls `skb_linearize` and the SKB gets reallocated, the original `tf` pointer within the caller becomes invalid because it points to memory that's no longer there, and the local `tf` variable in `ieee80211_process_tdls_channel_switch_req` is *also* invalid, since it was based on the old SKB data. But the code *does* re-assign `tf` from the *new* `skb->data`, so it appears okay there... except... `skb_linearize` can reallocate. Ah, right! `tf` in the caller *is* a local variable, so it's not updated by `skb_linearize`. The `skb->data` *is* updated, but the local `tf` variable won't be. This is a clear bug.

Specifically, at line 2009, `tf` is assigned, and then at line 2019, `skb_linearize` is called. If `skb_linearize` reallocates, `tf` is now invalid, but the code proceeds to use `tf` at line 2025 in the `switch` statement.

If `tf` is now invalid, `tf->action_code` can contain garbage. This means the `default` case of the `switch` statement, which triggers the `WARN_ON_ONCE(1)`, could be hit if the garbage value is not `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE`.

So, can an attacker exploit this? They need to somehow ensure the TDLS channel switch frame is non-linear when it reaches `ieee80211_process_tdls_channel_switch_req`. Small TDLS frames are unlikely to be fragmented unless an attacker does something unusual. However, what if they sent a very *large* TDLS frame? But `ieee80211_rx_h_data` does check the action code. Smaller frames are more likely to be legitimate, right?

But wait! Non-linear SKBs could also be page-backed. Some drivers might always create non-linear SKBs. Now I see there is another check.

I need to understand what this `WARN_ON_ONCE(1)` actually means in this context. Is the issue simply a UAF (Use-After-Free), or something else?

I need to confirm if `tf->action_code` is indeed the *same* value that was checked in the `rx.c` code. Looking at `rx.c`, `tf->action_code` is checked, and then later in `tdls.c` the *same* `tf` is being used, but is it?

In `rx.c`, `rx->skb->data` points to the Ethernet header. Then, the SKB is queued, and later dequeued in `iface.c`.  `skb->data` should still point to the same location, but what happens during the processing?

I just found something interesting in `ieee80211_rx_h_data`. `pskb_may_pull` *ensures* the header is in the linear part, so `tf->action_code` in `rx.c` is *definitely* in the linear part.

If `skb_linearize` is called, it can make the *whole* SKB linear. If it *was* already linear, it does nothing. If it wasn't linear, it reallocates and copies.

If it reallocates, the original `tf` becomes invalid! Then `tf->action_code` reads from freed memory, resulting in the vulnerability. If the attacker can control the contents of that freed memory, they could potentially trigger the `WARN`. This sounds like a race condition or depends on the memory allocation pattern/memory pressure. Is there a simpler way? Maybe the `tf->action_code` can be changed by something else? I need to go back to the `WARN_ON_ONCE(1)` and see

map[End:2035 File:net/mac80211/tdls.c Start:2025]

map[Output:8a4d32f30d11d 2025) 	switch (tf->action_code) {
8a4d32f30d11d 2026) 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
8a4d32f30d11d 2027) 		ieee80211_process_tdls_channel_switch_req(sdata, skb);
8a4d32f30d11d 2028) 		break;
8a4d32f30d11d 2029) 	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
8a4d32f30d11d 2030) 		ieee80211_process_tdls_channel_switch_resp(sdata, skb);
8a4d32f30d11d 2031) 		break;
8a4d32f30d11d 2032) 	default:
8a4d32f30d11d 2033) 		WARN_ON_ONCE(1);
8a4d32f30d11d 2034) 		return;
8a4d32f30d11d 2035) 	}
]

gemini-3-flash-preview

							input: 51531
							output: 28
							thoughts: 25
						

Here's a summary of my immediate thought process:

**Diving into Commit 8a4d32f30d11d**

Okay, so the commit hash is `8a4d32f30d11d`. Time to get down to brass tacks. I need to understand what this specific commit is all about. Given my expertise, I'm already anticipating the kind of investigation this will require. I'll be looking for clues in the diff, the commit message, and possibly the context within the wider branch or PR. This initial identifier is the gateway to understanding its impact, the problem it's addressing, and if there are any immediate red flags. Let's see what we're working with here.

map[Commit:8a4d32f30d11d]

map[Output:commit 8a4d32f30d11d6d8cc29594c7a36b9be6b0edbb5
Author: Arik Nemtsov <arik@wizery.com>
Date:   Sun Nov 9 18:50:20 2014 +0200

    mac80211: add TDLS channel-switch Rx flow
    
    When receiving a TDLS channel switch request or response, parse the frame
    and call a new tdls_recv_channel_switch op in the low level driver with
    the parsed data.
    
    Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
    Signed-off-by: Arik Nemtsov <arik@wizery.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index fdedceb7adcb..56b7e2114728 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1826,6 +1826,31 @@ struct ieee80211_scan_request {
 	struct cfg80211_scan_request req;
 };
 
+/**
+ * struct ieee80211_tdls_ch_sw_params - TDLS channel switch parameters
+ *
+ * @sta: peer this TDLS channel-switch request/response came from
+ * @chandef: channel referenced in a TDLS channel-switch request
+ * @action_code: see &enum ieee80211_tdls_actioncode
+ * @status: channel-switch response status
+ * @timestamp: time at which the frame was received
+ * @switch_time: switch-timing parameter received in the frame
+ * @switch_timeout: switch-timing parameter received in the frame
+ * @tmpl_skb: TDLS switch-channel response template
+ * @ch_sw_tm_ie: offset of the channel-switch timing IE inside @tmpl_skb
+ */
+struct ieee80211_tdls_ch_sw_params {
+	struct ieee80211_sta *sta;
+	struct cfg80211_chan_def *chandef;
+	u8 action_code;
+	u32 status;
+	u32 timestamp;
+	u16 switch_time;
+	u16 switch_timeout;
+	struct sk_buff *tmpl_skb;
+	u32 ch_sw_tm_ie;
+};
+
 /**
  * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy
  *
@@ -2925,6 +2950,13 @@ enum ieee80211_reconfig_type {
  *	optionally copy the skb for further re-use.
  * @tdls_cancel_channel_switch: Stop channel-switching with a TDLS peer. Both
  *	peers must be on the base channel when the call completes.
+ * @tdls_recv_channel_switch: a TDLS channel-switch related frame (request or
+ *	response) has been received from a remote peer. The driver gets
+ *	parameters parsed from the incoming frame and may use them to continue
+ *	an ongoing channel-switch operation. In addition, a channel-switch
+ *	response template is provided, together with the location of the
+ *	switch-timing IE within the template. The skb can only be used within
+ *	the function call.
  */
 struct ieee80211_ops {
 	void (*tx)(struct ieee80211_hw *hw,
@@ -3141,10 +3173,13 @@ struct ieee80211_ops {
 				   struct ieee80211_vif *vif,
 				   struct ieee80211_sta *sta, u8 oper_class,
 				   struct cfg80211_chan_def *chandef,
-				   struct sk_buff *skb, u32 ch_sw_tm_ie);
+				   struct sk_buff *tmpl_skb, u32 ch_sw_tm_ie);
 	void (*tdls_cancel_channel_switch)(struct ieee80211_hw *hw,
 					   struct ieee80211_vif *vif,
 					   struct ieee80211_sta *sta);
+	void (*tdls_recv_channel_switch)(struct ieee80211_hw *hw,
+					 struct ieee80211_vif *vif,
+					 struct ieee80211_tdls_ch_sw_params *params);
 };
 
 /**
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index ec4ae42ac15f..ba0d2cb5df12 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -1337,4 +1337,16 @@ drv_tdls_cancel_channel_switch(struct ieee80211_local *local,
 	trace_drv_return_void(local);
 }
 
+static inline void
+drv_tdls_recv_channel_switch(struct ieee80211_local *local,
+			     struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_tdls_ch_sw_params *params)
+{
+	trace_drv_tdls_recv_channel_switch(local, sdata, params);
+	if (local->ops->tdls_recv_channel_switch)
+		local->ops->tdls_recv_channel_switch(&local->hw, &sdata->vif,
+						     params);
+	trace_drv_return_void(local);
+}
+
 #endif /* __MAC80211_DRIVER_OPS */
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 2c7abc077b6b..5de2e5f3a57e 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -993,6 +993,7 @@ enum sdata_queue_type {
 	IEEE80211_SDATA_QUEUE_AGG_STOP		= 2,
 	IEEE80211_SDATA_QUEUE_RX_AGG_START	= 3,
 	IEEE80211_SDATA_QUEUE_RX_AGG_STOP	= 4,
+	IEEE80211_SDATA_QUEUE_TDLS_CHSW		= 5,
 };
 
 enum {
@@ -2013,6 +2014,8 @@ int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
 					  struct net_device *dev,
 					  const u8 *addr);
+void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
+					   struct sk_buff *skb);
 
 extern const struct ethtool_ops ieee80211_ethtool_ops;
 
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 6b631c049eba..82473d909bb6 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1202,6 +1202,8 @@ static void ieee80211_iface_work(struct work_struct *work)
 							WLAN_BACK_RECIPIENT, 0,
 							false);
 			mutex_unlock(&local->sta_mtx);
+		} else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_TDLS_CHSW) {
+			ieee80211_process_tdls_channel_switch(sdata, skb);
 		} else if (ieee80211_is_action(mgmt->frame_control) &&
 			   mgmt->u.action.category == WLAN_CATEGORY_BACK) {
 			int len = skb->len;
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 774ccb2d9a76..6ab99da38db9 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -766,7 +766,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
 
 	if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
 	    (!local->ops->tdls_channel_switch ||
-	     !local->ops->tdls_cancel_channel_switch))
+	     !local->ops->tdls_cancel_channel_switch ||
+	     !local->ops->tdls_recv_channel_switch))
 		return -EOPNOTSUPP;
 
 #ifdef CONFIG_PM
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 0f4297e2aae2..d9bbb73d4436 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2333,6 +2333,27 @@ ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
 	if (!ieee80211_frame_allowed(rx, fc))
 		return RX_DROP_MONITOR;
 
+	/* directly handle TDLS channel switch requests/responses */
+	if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
+						cpu_to_be16(ETH_P_TDLS))) {
+		struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
+
+		if (pskb_may_pull(rx->skb,
+				  offsetof(struct ieee80211_tdls_data, u)) &&
+		    tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
+		    tf->category == WLAN_CATEGORY_TDLS &&
+		    (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
+		     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
+			rx->skb->pkt_type = IEEE80211_SDATA_QUEUE_TDLS_CHSW;
+			skb_queue_tail(&sdata->skb_queue, rx->skb);
+			ieee80211_queue_work(&rx->local->hw, &sdata->work);
+			if (rx->sta)
+				rx->sta->rx_packets++;
+
+			return RX_QUEUED;
+		}
+	}
+
 	if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
 	    unlikely(port_control) && sdata->bss) {
 		sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index 358f9a4512ad..55ddd77b865d 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -491,6 +491,20 @@ ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata,
 	}
 }
 
+static void
+ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata,
+					struct sk_buff *skb, const u8 *peer,
+					u16 status_code, bool initiator,
+					const u8 *extra_ies,
+					size_t extra_ies_len)
+{
+	if (status_code == 0)
+		ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator);
+
+	if (extra_ies_len)
+		memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len);
+}
+
 static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
 				   struct sk_buff *skb, const u8 *peer,
 				   u8 action_code, u16 status_code,
@@ -529,6 +543,12 @@ static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata,
 						       extra_ies_len,
 						       oper_class, chandef);
 		break;
+	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
+		ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer,
+							status_code,
+							initiator, extra_ies,
+							extra_ies_len);
+		break;
 	}
 
 }
@@ -601,6 +621,13 @@ ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 
 		skb_put(skb, sizeof(tf->u.chan_switch_req));
 		break;
+	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
+		tf->category = WLAN_CATEGORY_TDLS;
+		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
+
+		skb_put(skb, sizeof(tf->u.chan_switch_resp));
+		tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -681,6 +708,7 @@ ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 	case WLAN_TDLS_TEARDOWN:
 	case WLAN_TDLS_DISCOVERY_REQUEST:
 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
+	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 		ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
 						     sdata->dev, peer,
 						     action_code, dialog_token,
@@ -755,6 +783,7 @@ ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 		break;
 	case WLAN_TDLS_TEARDOWN:
 	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
+	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 		/* any value is ok */
 		break;
 	default:
@@ -1280,3 +1309,302 @@ ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
 out:
 	mutex_unlock(&local->sta_mtx);
 }
+
+static struct sk_buff *
+ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta,
+				   u32 *ch_sw_tm_ie_offset)
+{
+	struct ieee80211_sub_if_data *sdata = sta->sdata;
+	struct sk_buff *skb;
+	u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)];
+
+	/* initial timing are always zero in the template */
+	iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0);
+
+	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
+					WLAN_TDLS_CHANNEL_SWITCH_RESPONSE,
+					0, 0, !sta->sta.tdls_initiator,
+					extra_ies, sizeof(extra_ies), 0, NULL);
+	if (!skb)
+		return NULL;
+
+	skb = ieee80211_build_data_template(sdata, skb, 0);
+	if (IS_ERR(skb)) {
+		tdls_dbg(sdata,
+			 "Failed building TDLS channel switch resp frame\n");
+		return NULL;
+	}
+
+	if (ch_sw_tm_ie_offset) {
+		const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);
+
+		if (!tm_ie) {
+			tdls_dbg(sdata,
+				 "No switch timing IE in TDLS switch resp\n");
+			dev_kfree_skb_any(skb);
+			return NULL;
+		}
+
+		*ch_sw_tm_ie_offset = tm_ie - skb->data;
+	}
+
+	tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n",
+		 sta->sta.addr);
+	return skb;
+}
+
+static int
+ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata,
+					   struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee802_11_elems elems;
+	struct sta_info *sta;
+	struct ieee80211_tdls_data *tf = (void *)skb->data;
+	bool local_initiator;
+	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
+	int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable);
+	struct ieee80211_tdls_ch_sw_params params = {};
+	int ret;
+
+	params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
+	params.timestamp = rx_status->device_timestamp;
+
+	if (skb->len < baselen) {
+		tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n",
+			 skb->len);
+		return -EINVAL;
+	}
+
+	mutex_lock(&local->sta_mtx);
+	sta = sta_info_get(sdata, tf->sa);
+	if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
+		tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
+			 tf->sa);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	params.sta = &sta->sta;
+	params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code);
+	if (params.status != 0) {
+		ret = 0;
+		goto call_drv;
+	}
+
+	ieee802_11_parse_elems(tf->u.chan_switch_resp.variable,
+			       skb->len - baselen, false, &elems);
+	if (elems.parse_error) {
+		tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (!elems.ch_sw_timing || !elems.lnk_id) {
+		tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* validate the initiator is set correctly */
+	local_initiator =
+		!memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
+	if (local_initiator == sta->sta.tdls_initiator) {
+		tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time);
+	params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout);
+
+	params.tmpl_skb =
+		ieee80211_tdls_ch_sw_resp_tmpl_get(sta, &params.ch_sw_tm_ie);
+	if (!params.tmpl_skb) {
+		ret = -ENOENT;
+		goto out;
+	}
+
+call_drv:
+	drv_tdls_recv_channel_switch(sdata->local, sdata, &params);
+
+	tdls_dbg(sdata,
+		 "TDLS channel switch response received from %pM status %d\n",
+		 tf->sa, params.status);
+
+out:
+	mutex_unlock(&local->sta_mtx);
+	dev_kfree_skb_any(params.tmpl_skb);
+	return ret;
+}
+
+static int
+ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
+					  struct sk_buff *skb)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee802_11_elems elems;
+	struct cfg80211_chan_def chandef;
+	struct ieee80211_channel *chan;
+	enum nl80211_channel_type chan_type;
+	int freq;
+	u8 target_channel, oper_class;
+	bool local_initiator;
+	struct sta_info *sta;
+	enum ieee80211_band band;
+	struct ieee80211_tdls_data *tf = (void *)skb->data;
+	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
+	int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable);
+	struct ieee80211_tdls_ch_sw_params params = {};
+	int ret = 0;
+
+	params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
+	params.timestamp = rx_status->device_timestamp;
+
+	if (skb->len < baselen) {
+		tdls_dbg(sdata, "TDLS channel switch req too short: %d\n",
+			 skb->len);
+		return -EINVAL;
+	}
+
+	target_channel = tf->u.chan_switch_req.target_channel;
+	oper_class = tf->u.chan_switch_req.oper_class;
+
+	/*
+	 * We can't easily infer the channel band. The operating class is
+	 * ambiguous - there are multiple tables (US/Europe/JP/Global). The
+	 * solution here is to treat channels with number >14 as 5GHz ones,
+	 * and specifically check for the (oper_class, channel) combinations
+	 * where this doesn't hold. These are thankfully unique according to
+	 * IEEE802.11-2012.
+	 * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as
+	 * valid here.
+	 */
+	if ((oper_class == 112 || oper_class == 2 || oper_class == 3 ||
+	     oper_class == 4 || oper_class == 5 || oper_class == 6) &&
+	     target_channel < 14)
+		band = IEEE80211_BAND_5GHZ;
+	else
+		band = target_channel < 14 ? IEEE80211_BAND_2GHZ :
+					     IEEE80211_BAND_5GHZ;
+
+	freq = ieee80211_channel_to_frequency(target_channel, band);
+	if (freq == 0) {
+		tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n",
+			 target_channel);
+		return -EINVAL;
+	}
+
+	chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
+	if (!chan) {
+		tdls_dbg(sdata,
+			 "Unsupported channel for TDLS chan switch: %d\n",
+			 target_channel);
+		return -EINVAL;
+	}
+
+	ieee802_11_parse_elems(tf->u.chan_switch_req.variable,
+			       skb->len - baselen, false, &elems);
+	if (elems.parse_error) {
+		tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n");
+		return -EINVAL;
+	}
+
+	if (!elems.ch_sw_timing || !elems.lnk_id) {
+		tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&local->sta_mtx);
+	sta = sta_info_get(sdata, tf->sa);
+	if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
+		tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
+			 tf->sa);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	params.sta = &sta->sta;
+
+	/* validate the initiator is set correctly */
+	local_initiator =
+		!memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
+	if (local_initiator == sta->sta.tdls_initiator) {
+		tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (!sta->sta.ht_cap.ht_supported) {
+		chan_type = NL80211_CHAN_NO_HT;
+	} else if (!elems.sec_chan_offs) {
+		chan_type = NL80211_CHAN_HT20;
+	} else {
+		switch (elems.sec_chan_offs->sec_chan_offs) {
+		case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+			chan_type = NL80211_CHAN_HT40PLUS;
+			break;
+		case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+			chan_type = NL80211_CHAN_HT40MINUS;
+			break;
+		default:
+			chan_type = NL80211_CHAN_HT20;
+			break;
+		}
+	}
+
+	cfg80211_chandef_create(&chandef, chan, chan_type);
+	params.chandef = &chandef;
+
+	params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time);
+	params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout);
+
+	params.tmpl_skb =
+		ieee80211_tdls_ch_sw_resp_tmpl_get(sta,
+						   &params.ch_sw_tm_ie);
+	if (!params.tmpl_skb) {
+		ret = -ENOENT;
+		goto out;
+	}
+
+	drv_tdls_recv_channel_switch(sdata->local, sdata, &params);
+
+	tdls_dbg(sdata,
+		 "TDLS ch switch request received from %pM ch %d width %d\n",
+		 tf->sa, params.chandef->chan->center_freq,
+		 params.chandef->width);
+out:
+	mutex_unlock(&local->sta_mtx);
+	dev_kfree_skb_any(params.tmpl_skb);
+	return ret;
+}
+
+void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
+					   struct sk_buff *skb)
+{
+	struct ieee80211_tdls_data *tf = (void *)skb->data;
+	struct wiphy *wiphy = sdata->local->hw.wiphy;
+
+	/* make sure the driver supports it */
+	if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
+		return;
+
+	/* we want to access the entire packet */
+	if (skb_linearize(skb))
+		return;
+	/*
+	 * The packet/size was already validated by mac80211 Rx path, only look
+	 * at the action type.
+	 */
+	switch (tf->action_code) {
+	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
+		ieee80211_process_tdls_channel_switch_req(sdata, skb);
+		break;
+	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
+		ieee80211_process_tdls_channel_switch_resp(sdata, skb);
+		break;
+	default:
+		WARN_ON_ONCE(1);
+		return;
+	}
+}
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index c0c0fcace9d8..7f76e2f25744 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -16,6 +16,7 @@
 
 #define STA_ENTRY	__array(char, sta_addr, ETH_ALEN)
 #define STA_ASSIGN	(sta ? memcpy(__entry->sta_addr, sta->addr, ETH_ALEN) : memset(__entry->sta_addr, 0, ETH_ALEN))
+#define STA_NAMED_ASSIGN(s)	memcpy(__entry->sta_addr, (s)->addr, ETH_ALEN)
 #define STA_PR_FMT	" sta:%pM"
 #define STA_PR_ARG	__entry->sta_addr
 
@@ -2254,6 +2255,50 @@ TRACE_EVENT(drv_tdls_cancel_channel_switch,
 	)
 );
 
+TRACE_EVENT(drv_tdls_recv_channel_switch,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sub_if_data *sdata,
+		 struct ieee80211_tdls_ch_sw_params *params),
+
+	TP_ARGS(local, sdata, params),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		VIF_ENTRY
+		__field(u8, action_code)
+		STA_ENTRY
+		CHANDEF_ENTRY
+		__field(u32, status)
+		__field(bool, peer_initiator)
+		__field(u32, timestamp)
+		__field(u16, switch_time)
+		__field(u16, switch_timeout)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		VIF_ASSIGN;
+		STA_NAMED_ASSIGN(params->sta);
+		CHANDEF_ASSIGN(params->chandef)
+		__entry->peer_initiator = params->sta->tdls_initiator;
+		__entry->action_code = params->action_code;
+		__entry->status = params->status;
+		__entry->timestamp = params->timestamp;
+		__entry->switch_time = params->switch_time;
+		__entry->switch_timeout = params->switch_timeout;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT VIF_PR_FMT " received tdls channel switch packet"
+		" action:%d status:%d time:%d switch time:%d switch"
+		" timeout:%d initiator: %d chan:" CHANDEF_PR_FMT STA_PR_FMT,
+		LOCAL_PR_ARG, VIF_PR_ARG, __entry->action_code, __entry->status,
+		__entry->timestamp, __entry->switch_time,
+		__entry->switch_timeout, __entry->peer_initiator,
+		CHANDEF_PR_ARG, STA_PR_ARG
+	)
+);
+
 #ifdef CONFIG_MAC80211_MESSAGE_TRACING
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM mac80211_msg
]

gemini-3-flash-preview

							input: 60700
							output: 19
							thoughts: 112
						

**Analyzing a Potential Vulnerability**

Okay, so commit `8a4d32f30d11d` introduced the `ieee80211_process_tdls_channel_switch` function. My initial scan raises a red flag; it appears to have a `skb_linearize` call immediately followed by an access to `tf->action_code` without any intervening re-assignment of `tf`. This smells like a classic use-after-free or data corruption scenario, though obviously I need to investigate further. Let me think, has anyone already addressed this issue? Hmm, I will check if this was ever patched. The smart thing to do is search for `skb_linearize` within `net/mac80211/tdls.c` to see if there's any evidence of a fix or related modifications.

map[Expression:skb_linearize]

map[Output:
Full output is too long, showing 500 out of 899 lines.
Use more precise expression if possible.

[arch/um/drivers/vector_kern.c=285=static int prep_msg(struct vector_private *vp,
 --
 arch/um/drivers/vector_kern.c-294-	if (nr_frags > MAX_IOV_SIZE) {
 arch/um/drivers/vector_kern.c:295:		if (skb_linearize(skb) != 0)
 arch/um/drivers/vector_kern.c-296-			goto drop;
 --
 drivers/block/aoe/aoecmd.c=1114=noskb:		if (buf)
 --
 drivers/block/aoe/aoecmd.c-1156-		}
 drivers/block/aoe/aoecmd.c:1157:		if (skb_linearize(skb))
 drivers/block/aoe/aoecmd.c-1158-			break;
 --
 drivers/infiniband/sw/rxe/rxe_net.c=214=static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
 --
 drivers/infiniband/sw/rxe/rxe_net.c-229-
 drivers/infiniband/sw/rxe/rxe_net.c:230:	if (skb_linearize(skb)) {
 drivers/infiniband/sw/rxe/rxe_net.c-231-		ib_device_put(&rxe->ib_dev);
 --
 drivers/infiniband/ulp/ipoib/ipoib_cm.c=708=void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
 --
 drivers/infiniband/ulp/ipoib/ipoib_cm.c-723-	if (skb_shinfo(skb)->nr_frags > usable_sge) {
 drivers/infiniband/ulp/ipoib/ipoib_cm.c:724:		if (skb_linearize(skb) < 0) {
 drivers/infiniband/ulp/ipoib/ipoib_cm.c-725-			ipoib_warn(priv, "skb could not be linearized\n");
 --
 drivers/infiniband/ulp/ipoib/ipoib_cm.c-730-		}
 drivers/infiniband/ulp/ipoib/ipoib_cm.c:731:		/* Does skb_linearize return ok without reducing nr_frags? */
 drivers/infiniband/ulp/ipoib/ipoib_cm.c-732-		if (skb_shinfo(skb)->nr_frags > usable_sge) {
 --
 drivers/infiniband/ulp/ipoib/ipoib_ib.c=591=int ipoib_send(struct net_device *dev, struct sk_buff *skb,
 --
 drivers/infiniband/ulp/ipoib/ipoib_ib.c-622-	if (skb_shinfo(skb)->nr_frags > usable_sge) {
 drivers/infiniband/ulp/ipoib/ipoib_ib.c:623:		if (skb_linearize(skb) < 0) {
 drivers/infiniband/ulp/ipoib/ipoib_ib.c-624-			ipoib_warn(priv, "skb could not be linearized\n");
 --
 drivers/infiniband/ulp/ipoib/ipoib_ib.c-629-		}
 drivers/infiniband/ulp/ipoib/ipoib_ib.c:630:		/* Does skb_linearize return ok without reducing nr_frags? */
 drivers/infiniband/ulp/ipoib/ipoib_ib.c-631-		if (skb_shinfo(skb)->nr_frags > usable_sge) {
 --
 drivers/net/ethernet/agere/et131x.c=3796=static netdev_tx_t et131x_tx(struct sk_buff *skb, struct net_device *netdev)
 --
 drivers/net/ethernet/agere/et131x.c-3804-	if (unlikely(skb_shinfo(skb)->nr_frags > MAX_TX_DESC_PER_PKT - 2)) {
 drivers/net/ethernet/agere/et131x.c:3805:		if (skb_linearize(skb))
 drivers/net/ethernet/agere/et131x.c-3806-			goto drop_err;
 --
 drivers/net/ethernet/amazon/ena/ena_netdev.c=2472=static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
 --
 drivers/net/ethernet/amazon/ena/ena_netdev.c-2488-
 drivers/net/ethernet/amazon/ena/ena_netdev.c:2489:	rc = skb_linearize(skb);
 drivers/net/ethernet/amazon/ena/ena_netdev.c-2490-	if (unlikely(rc)) {
 --
 drivers/net/ethernet/amd/xgbe/xgbe-selftest.c=32=static int xgbe_test_loopback_validate(struct sk_buff *skb,
 --
 drivers/net/ethernet/amd/xgbe/xgbe-selftest.c-57-
 drivers/net/ethernet/amd/xgbe/xgbe-selftest.c:58:	if (skb_linearize(skb))
 drivers/net/ethernet/amd/xgbe/xgbe-selftest.c-59-		goto out;
 --
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c=307=static int xgene_enet_work_msg(struct sk_buff *skb, u64 *hopinfo)
 --
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c-347-				if (unlikely(hdr_len > len)) {
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c:348:					if (skb_linearize(skb))
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c-349-						return 0;
 --
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c=3751=netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c-3836-		bp->lin_cnt++;
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c:3837:		if (skb_linearize(skb) != 0) {
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c-3838-			DP(NETIF_MSG_TX_QUEUED,
 --
 drivers/net/ethernet/broadcom/bnxt/bnxt.c=469=static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/ethernet/broadcom/bnxt/bnxt.c-501-				 skb_shinfo(skb)->nr_frags, TX_MAX_FRAGS);
 drivers/net/ethernet/broadcom/bnxt/bnxt.c:502:		if (skb_linearize(skb)) {
 drivers/net/ethernet/broadcom/bnxt/bnxt.c-503-			dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/cisco/enic/enic_main.c=833=static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/cisco/enic/enic_main.c-858-	    skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 drivers/net/ethernet/cisco/enic/enic_main.c:859:	    skb_linearize(skb)) {
 drivers/net/ethernet/cisco/enic/enic_main.c-860-		dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/cortina/gemini.c=1271=static netdev_tx_t gmac_start_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/cortina/gemini.c-1319-	if (gmac_map_tx_bufs(netdev, skb, txq, &w)) {
 drivers/net/ethernet/cortina/gemini.c:1320:		if (skb_linearize(skb))
 drivers/net/ethernet/cortina/gemini.c-1321-			goto out_drop;
 --
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c=2294=dpaa_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
 --
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c-2339-		 */
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c:2340:		if (__skb_linearize(skb))
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c-2341-			goto enomem;
 --
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c=1082=static netdev_tx_t dpaa2_switch_port_tx(struct sk_buff *skb,
 --
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c-1113-	 */
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c:1114:	err = skb_linearize(skb);
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c-1115-	if (err) {
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c:1116:		net_err_ratelimited("%s: skb_linearize error (%d)!\n", net_dev->name, err);
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c-1117-		goto err_free_skb;
 --
 drivers/net/ethernet/freescale/enetc/enetc.c=977=static netdev_tx_t enetc_start_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/freescale/enetc/enetc.c-1018-		if (unlikely(skb_shinfo(skb)->nr_frags > priv->max_frags))
 drivers/net/ethernet/freescale/enetc/enetc.c:1019:			if (unlikely(skb_linearize(skb)))
 drivers/net/ethernet/freescale/enetc/enetc.c-1020-				goto drop_packet_err;
 --
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c=424=static struct sk_buff *tx_skb_align_workaround(struct net_device *dev,
 --
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-428-
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c:429:	if (skb_linearize(skb))
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-430-		return NULL;
 --
 drivers/net/ethernet/google/gve/gve_tx_dqo.c=967=static int gve_try_tx_skb(struct gve_priv *priv, struct gve_tx_ring *tx,
 --
 drivers/net/ethernet/google/gve/gve_tx_dqo.c-985-			if (unlikely(num_buffer_descs > GVE_TX_MAX_DATA_DESCS)) {
 drivers/net/ethernet/google/gve/gve_tx_dqo.c:986:				if (unlikely(skb_linearize(skb) < 0))
 drivers/net/ethernet/google/gve/gve_tx_dqo.c-987-					goto drop;
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c=1904=void hns3_shinfo_pack(struct skb_shared_info *shinfo, __u32 *size)
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1911-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c:1912:static int hns3_skb_linearize(struct hns3_enet_ring *ring,
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1913-			      struct sk_buff *skb,
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1932-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c:1933:	if (__skb_linearize(skb)) {
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1934-		hns3_ring_stats_update(ring, sw_err_cnt);
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c=1941=static int hns3_nic_maybe_stop_tx(struct hns3_enet_ring *ring,
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1958-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c:1959:		if (hns3_skb_linearize(ring, skb, bd_num))
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1960-			return -ENOMEM;
 --
 drivers/net/ethernet/intel/i40e/i40e_txrx.c=3868=static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb,
 --
 drivers/net/ethernet/intel/i40e/i40e_txrx.c-3887-	if (i40e_chk_linearize(skb, count)) {
 drivers/net/ethernet/intel/i40e/i40e_txrx.c:3888:		if (__skb_linearize(skb)) {
 drivers/net/ethernet/intel/i40e/i40e_txrx.c-3889-			dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/intel/iavf/iavf_txrx.c=2291=static netdev_tx_t iavf_xmit_frame_ring(struct sk_buff *skb,
 --
 drivers/net/ethernet/intel/iavf/iavf_txrx.c-2310-	if (iavf_chk_linearize(skb, count)) {
 drivers/net/ethernet/intel/iavf/iavf_txrx.c:2311:		if (__skb_linearize(skb)) {
 drivers/net/ethernet/intel/iavf/iavf_txrx.c-2312-			dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/intel/ice/ice_txrx.c=2150=ice_xmit_frame_ring(struct sk_buff *skb, struct ice_tx_ring *tx_ring)
 --
 drivers/net/ethernet/intel/ice/ice_txrx.c-2162-	if (ice_chk_linearize(skb, count)) {
 drivers/net/ethernet/intel/ice/ice_txrx.c:2163:		if (__skb_linearize(skb))
 drivers/net/ethernet/intel/ice/ice_txrx.c-2164-			goto out_drop;
 --
 drivers/net/ethernet/intel/idpf/idpf_txrx.c=2502=unsigned int idpf_tx_res_count_required(struct idpf_tx_queue *txq,
 --
 drivers/net/ethernet/intel/idpf/idpf_txrx.c-2531-	if (idpf_chk_linearize(skb, txq->tx_max_bufs, count)) {
 drivers/net/ethernet/intel/idpf/idpf_txrx.c:2532:		if (__skb_linearize(skb))
 drivers/net/ethernet/intel/idpf/idpf_txrx.c-2533-			return 0;
 --
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c=383=int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
 --
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c-469-	    (fctl & FC_FC_END_SEQ)) {
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c:470:		skb_linearize(skb);
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c-471-		crc = skb_put(skb, sizeof(*crc));
 --
 drivers/net/ethernet/marvell/mv643xx_eth.c=993=static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/ethernet/marvell/mv643xx_eth.c-1003-
 drivers/net/ethernet/marvell/mv643xx_eth.c:1004:	if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
 drivers/net/ethernet/marvell/mv643xx_eth.c-1005-		netdev_printk(KERN_DEBUG, dev,
 --
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c=1189=bool otx2_sq_append_skb(void *dev, struct netdev_queue *txq,
 --
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c-1214-	if (unlikely(num_segs > OTX2_MAX_FRAGS_IN_SQE)) {
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c:1215:		if (__skb_linearize(skb)) {
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c-1216-			dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c=158=mlx5e_test_loopback_validate(struct sk_buff *skb,
 --
 drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c-168-
 drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c:169:	if (skb_linearize(skb))
 drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c-170-		goto out;
 --
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_tx.c=191=netdev_tx_t mlxbf_gige_start_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_tx.c-202-	/* If needed, linearize TX SKB as hardware DMA expects this */
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_tx.c:203:	if (skb->len > MLXBF_GIGE_DEFAULT_BUF_SZ || skb_linearize(skb)) {
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_tx.c-204-		dev_kfree_skb(skb);
 --
 drivers/net/ethernet/mellanox/mlxsw/pci.c=2157=static int mlxsw_pci_skb_transmit(void *bus_priv, struct sk_buff *skb,
 --
 drivers/net/ethernet/mellanox/mlxsw/pci.c-2171-	if (skb_shinfo(skb)->nr_frags > MLXSW_PCI_WQE_SG_ENTRIES - 1) {
 drivers/net/ethernet/mellanox/mlxsw/pci.c:2172:		err = skb_linearize(skb);
 drivers/net/ethernet/mellanox/mlxsw/pci.c-2173-		if (err)
 --
 drivers/net/ethernet/microchip/lan743x_main.c=2418=lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
 drivers/net/ethernet/microchip/lan743x_main.c-2419-{
 drivers/net/ethernet/microchip/lan743x_main.c:2420:	if (skb_linearize(skb)) {
 drivers/net/ethernet/microchip/lan743x_main.c-2421-		dev_kfree_skb_irq(skb);
 --
 drivers/net/ethernet/microsoft/mana/mana_en.c=335=netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 --
 drivers/net/ethernet/microsoft/mana/mana_en.c-368-		 */
 drivers/net/ethernet/microsoft/mana/mana_en.c:369:		if (skb_linearize(skb)) {
 drivers/net/ethernet/microsoft/mana/mana_en.c-370-			netdev_warn_once(ndev, "Failed to linearize skb with nr_frags=%d and is_gso=%d\n",
 --
 drivers/net/ethernet/microsoft/mana/mana_en.c=564=static netdev_features_t mana_features_check(struct sk_buff *skb,
 --
 drivers/net/ethernet/microsoft/mana/mana_en.c-573-		 * Non-GSO case:
 drivers/net/ethernet/microsoft/mana/mana_en.c:574:		 *   The xmit path will attempt skb_linearize() as a fallback.
 drivers/net/ethernet/microsoft/mana/mana_en.c-575-		 */
 --
 drivers/net/ethernet/mscc/ocelot_fdma.c=640=static int ocelot_fdma_prepare_skb(struct ocelot *ocelot, int port, u32 rew_op,
 --
 drivers/net/ethernet/mscc/ocelot_fdma.c-657-
 drivers/net/ethernet/mscc/ocelot_fdma.c:658:	err = skb_linearize(skb);
 drivers/net/ethernet/mscc/ocelot_fdma.c-659-	if (err) {
 drivers/net/ethernet/mscc/ocelot_fdma.c:660:		net_err_ratelimited("%s: skb_linearize error (%d)!\n",
 drivers/net/ethernet/mscc/ocelot_fdma.c-661-				    dev->name, err);
 --
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c=2644=static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c-2898-
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c:2899:	if (skb_linearize(skb))
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c-2900-		goto drop;
 --
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c=119=nfp_nfdk_tx_maybe_close_block(struct nfp_net_tx_ring *tx_ring,
 --
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c-139-		if (skb_is_nonlinear(skb)) {
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c:140:			err = skb_linearize(skb);
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c-141-			if (err)
 --
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c=253=netdev_tx_t nfp_nfdk_tx(struct sk_buff *skb, struct net_device *netdev)
 --
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c-295-
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c:296:	/* nr_frags will change after skb_linearize so we get nr_frags after
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c-297-	 * nfp_nfdk_tx_maybe_close_block function
 --
 drivers/net/ethernet/oa_tc6.c=1203=netdev_tx_t oa_tc6_start_xmit(struct oa_tc6 *tc6, struct sk_buff *skb)
 --
 drivers/net/ethernet/oa_tc6.c-1209-
 drivers/net/ethernet/oa_tc6.c:1210:	if (skb_linearize(skb)) {
 drivers/net/ethernet/oa_tc6.c-1211-		dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c=1678=static int ionic_tx_descs_needed(struct ionic_queue *q, struct sk_buff *skb)
 --
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c-1756-	if (too_many_frags) {
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c:1757:		err = skb_linearize(skb);
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c-1758-		if (unlikely(err))
 --
 drivers/net/ethernet/qlogic/qede/qede_fp.c=1479=netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 --
 drivers/net/ethernet/qlogic/qede/qede_fp.c-1508-	if (qede_pkt_req_lin(skb, xmit_type)) {
 drivers/net/ethernet/qlogic/qede/qede_fp.c:1509:		if (skb_linearize(skb)) {
 drivers/net/ethernet/qlogic/qede/qede_fp.c-1510-			txq->tx_mem_alloc_err++;
 --
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c=200=rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb)
 --
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c-208-
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:209:	if (skb_linearize(skb)) {
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c-210-		kfree_skb(skb);
 --
 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c=533=static void rmnet_send_skb(struct rmnet_port *port, struct sk_buff *skb)
 --
 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c-535-	if (skb_needs_linearize(skb, port->dev->features)) {
 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:536:		if (unlikely(__skb_linearize(skb))) {
 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c-537-			struct rmnet_priv *priv;
 --
 drivers/net/ethernet/rocker/rocker_main.c=1880=static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/ethernet/rocker/rocker_main.c-1905-	if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
 drivers/net/ethernet/rocker/rocker_main.c:1906:		err = skb_linearize(skb);
 drivers/net/ethernet/rocker/rocker_main.c-1907-		if (err)
 --
 drivers/net/ethernet/sfc/ptp.c=1122=static void efx_ptp_xmit_skb_mc(struct efx_nic *efx, struct sk_buff *skb)
 --
 drivers/net/ethernet/sfc/ptp.c-1133-	if (skb_shinfo(skb)->nr_frags != 0) {
 drivers/net/ethernet/sfc/ptp.c:1134:		rc = skb_linearize(skb);
 drivers/net/ethernet/sfc/ptp.c-1135-		if (rc != 0)
 --
 drivers/net/ethernet/sfc/siena/ptp.c=1104=static void efx_ptp_xmit_skb_mc(struct efx_nic *efx, struct sk_buff *skb)
 --
 drivers/net/ethernet/sfc/siena/ptp.c-1115-	if (skb_shinfo(skb)->nr_frags != 0) {
 drivers/net/ethernet/sfc/siena/ptp.c:1116:		rc = skb_linearize(skb);
 drivers/net/ethernet/sfc/siena/ptp.c-1117-		if (rc != 0)
 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c=246=static int stmmac_test_loopback_validate(struct sk_buff *skb,
 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c-263-
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c:264:	if (skb_linearize(skb))
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c-265-		goto out;
 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c=835=static int stmmac_test_vlan_validate(struct sk_buff *skb,
 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c-852-
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c:853:	if (skb_linearize(skb))
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c-854-		goto out;
 --
 drivers/net/ethernet/tehuti/tn40.c=574=static int tn40_tx_map_skb(struct tn40_priv *priv, struct sk_buff *skb,
 --
 drivers/net/ethernet/tehuti/tn40.c-587-	if (nr_frags > TN40_MAX_PBL - 1) {
 drivers/net/ethernet/tehuti/tn40.c:588:		ret = skb_linearize(skb);
 drivers/net/ethernet/tehuti/tn40.c-589-		if (ret)
 --
 drivers/net/ethernet/via/via-velocity.c=2532=static netdev_tx_t velocity_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/via/via-velocity.c-2548-	 * the skb if there are more */
 drivers/net/ethernet/via/via-velocity.c:2549:	if (skb_shinfo(skb)->nr_frags > 6 && __skb_linearize(skb)) {
 drivers/net/ethernet/via/via-velocity.c-2550-		dev_kfree_skb_any(skb);
 --
 drivers/net/hyperv/netvsc_drv.c=442=static int netvsc_xmit(struct sk_buff *skb, struct net_device *net, bool xdp_tx)
 --
 drivers/net/hyperv/netvsc_drv.c-474-
 drivers/net/hyperv/netvsc_drv.c:475:		if (skb_linearize(skb))
 drivers/net/hyperv/netvsc_drv.c-476-			goto no_memory;
 --
 drivers/net/ipa/ipa_endpoint.c=1236=int ipa_endpoint_skb_tx(struct ipa_endpoint *endpoint, struct sk_buff *skb)
 --
 drivers/net/ipa/ipa_endpoint.c-1247-	if (nr_frags > endpoint->skb_frag_max) {
 drivers/net/ipa/ipa_endpoint.c:1248:		if (skb_linearize(skb))
 drivers/net/ipa/ipa_endpoint.c-1249-			return -E2BIG;
 --
 drivers/net/netdevsim/netdev.c=123=static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/netdevsim/netdev.c-163-	      cfg->hds_thresh > len)))
 drivers/net/netdevsim/netdev.c:164:		skb_linearize(skb);
 drivers/net/netdevsim/netdev.c-165-
 --
 drivers/net/ppp/ppp_generic.c=1707=pad_compress_skb(struct ppp *ppp, struct sk_buff *skb)
 --
 drivers/net/ppp/ppp_generic.c-1715-
 drivers/net/ppp/ppp_generic.c:1716:	if (skb_linearize(skb))
 drivers/net/ppp/ppp_generic.c-1717-		return NULL;
 --
 drivers/net/ppp/ppp_generic.c=1765=ppp_send_frame(struct ppp *ppp, struct sk_buff *skb)
 --
 drivers/net/ppp/ppp_generic.c-1806-
 drivers/net/ppp/ppp_generic.c:1807:		if (skb_linearize(skb))
 drivers/net/ppp/ppp_generic.c-1808-			goto drop;
 --
 drivers/net/ppp/ppp_generic.c=1889=ppp_push(struct ppp *ppp)
 --
 drivers/net/ppp/ppp_generic.c-1913-		chan = pch->chan;
 drivers/net/ppp/ppp_generic.c:1914:		if (unlikely(!chan || (!chan->direct_xmit && skb_linearize(skb)))) {
 drivers/net/ppp/ppp_generic.c-1915-			/* channel got unregistered, or it requires a linear
 --
 drivers/net/ppp/ppp_generic.c=1952=static int ppp_mp_explode(struct ppp *ppp, struct sk_buff *skb)
 --
 drivers/net/ppp/ppp_generic.c-2010-	/* Do protocol field compression */
 drivers/net/ppp/ppp_generic.c:2011:	if (skb_linearize(skb))
 drivers/net/ppp/ppp_generic.c-2012-		goto err_linearize;
 --
 drivers/net/usb/aqc111.c=1181=static struct sk_buff *aqc111_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 --
 drivers/net/usb/aqc111.c-1216-	if (!dev->can_dma_sg && (dev->net->features & NETIF_F_SG) &&
 drivers/net/usb/aqc111.c:1217:	    skb_linearize(skb))
 drivers/net/usb/aqc111.c-1218-		return NULL;
 --
 drivers/net/usb/ax88179_178a.c=1476=ax88179_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
 --
 drivers/net/usb/ax88179_178a.c-1489-
 drivers/net/usb/ax88179_178a.c:1490:	if ((dev->net->features & NETIF_F_SG) && skb_linearize(skb))
 drivers/net/usb/ax88179_178a.c-1491-		return NULL;
 --
 drivers/net/usb/lan78xx.c=511=static int lan78xx_alloc_buf_pool(struct sk_buff_head *buf_pool,
 --
 drivers/net/usb/lan78xx.c-526-
 drivers/net/usb/lan78xx.c:527:		if (skb_linearize(buf) != 0) {
 drivers/net/usb/lan78xx.c-528-			dev_kfree_skb_any(buf);
 --
 drivers/net/vmxnet3/vmxnet3_drv.c=1146=vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 --
 drivers/net/vmxnet3/vmxnet3_drv.c-1179-			 */
 drivers/net/vmxnet3/vmxnet3_drv.c:1180:			if (skb_linearize(skb) != 0) {
 drivers/net/vmxnet3/vmxnet3_drv.c-1181-				tq->stats.drop_too_many_frags++;
 --
 drivers/net/vmxnet3/vmxnet3_drv.c-1203-			 */
 drivers/net/vmxnet3/vmxnet3_drv.c:1204:			if (skb_linearize(skb) != 0) {
 drivers/net/vmxnet3/vmxnet3_drv.c-1205-				tq->stats.drop_too_many_frags++;
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c=2119=static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus,
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c-2166-				return -ENOMEM;
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:2167:		if (skb_linearize(pkt))
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c-2168-			return -ENOMEM;
 --
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx-gen2.c=717=int iwl_txq_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
 --
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx-gen2.c-736-	    skb_shinfo(skb)->nr_frags > IWL_TRANS_PCIE_MAX_FRAGS(trans_pcie) &&
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx-gen2.c:737:	    __skb_linearize(skb))
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx-gen2.c-738-		return -ENOMEM;
 --
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c=2108=int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 --
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c-2133-	    skb_shinfo(skb)->nr_frags > IWL_TRANS_PCIE_MAX_FRAGS(trans_pcie) &&
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c:2134:	    __skb_linearize(skb))
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c-2135-		return -ENOMEM;
 --
 drivers/net/wireless/mediatek/mt76/dma.c=637=mt76_dma_tx_queue_skb(struct mt76_phy *phy, struct mt76_queue *q,
 --
 drivers/net/wireless/mediatek/mt76/dma.c-658-	/* TODO: Take into account unlinear skbs */
 drivers/net/wireless/mediatek/mt76/dma.c:659:	if (mt76_npu_device_active(dev) && skb_linearize(skb))
 drivers/net/wireless/mediatek/mt76/dma.c-660-		goto free_skb;
 --
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c=353=void mt7921_mcu_rx_event(struct mt792x_dev *dev, struct sk_buff *skb)
 --
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c-356-
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c:357:	if (skb_linearize(skb))
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c-358-		return;
 --
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c=609=void mt7925_mcu_rx_event(struct mt792x_dev *dev, struct sk_buff *skb)
 --
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c-612-
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c:613:	if (skb_linearize(skb))
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c-614-		return;
 --
 drivers/net/xen-netfront.c=706=static netdev_tx_t xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/xen-netfront.c-746-				    slots, skb->len);
 drivers/net/xen-netfront.c:747:		if (skb_linearize(skb))
 drivers/net/xen-netfront.c-748-			goto drop;
 --
 drivers/s390/net/qeth_core_main.c=3950=static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
 --
 drivers/s390/net/qeth_core_main.c-3993-
 drivers/s390/net/qeth_core_main.c:3994:		rc = skb_linearize(skb);
 drivers/s390/net/qeth_core_main.c-3995-		if (rc) {
 --
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c=503=static void bnx2fc_recv_frame(struct sk_buff *skb)
 --
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c-528-	if (skb_is_nonlinear(skb))
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c:529:		skb_linearize(skb);
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c-530-	mac = eth_hdr(skb)->h_source;
 --
 drivers/scsi/fcoe/fcoe.c=1627=static void fcoe_recv_frame(struct sk_buff *skb)
 --
 drivers/scsi/fcoe/fcoe.c-1650-
 drivers/scsi/fcoe/fcoe.c:1651:	skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
 drivers/scsi/fcoe/fcoe.c-1652-
 --
 drivers/scsi/fcoe/fcoe_ctlr.c=1528=static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
 --
 drivers/scsi/fcoe/fcoe_ctlr.c-1536-
 drivers/scsi/fcoe/fcoe_ctlr.c:1537:	if (skb_linearize(skb))
 drivers/scsi/fcoe/fcoe_ctlr.c-1538-		goto drop;
 --
 drivers/scsi/qedf/qedf_main.c=2470=static void qedf_recv_frame(struct qedf_ctx *qedf,
 --
 drivers/scsi/qedf/qedf_main.c-2492-	if (skb_is_nonlinear(skb))
 drivers/scsi/qedf/qedf_main.c:2493:		skb_linearize(skb);
 drivers/scsi/qedf/qedf_main.c-2494-	mac = eth_hdr(skb)->h_source;
 --
 drivers/staging/octeon/ethernet-tx.c=126=netdev_tx_t cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/staging/octeon/ethernet-tx.c-189-	if (unlikely(skb_shinfo(skb)->nr_frags > 5)) {
 drivers/staging/octeon/ethernet-tx.c:190:		if (unlikely(__skb_linearize(skb))) {
 drivers/staging/octeon/ethernet-tx.c-191-			queue_type = QUEUE_DROP;
 --
 include/linux/skbuff.h=3967=static inline bool skb_can_coalesce(struct sk_buff *skb, int i,
 --
 include/linux/skbuff.h-3972-
 include/linux/skbuff.h:3973:static inline int __skb_linearize(struct sk_buff *skb)
 include/linux/skbuff.h-3974-{
 --
 include/linux/skbuff.h-3978-/**
 include/linux/skbuff.h:3979: *	skb_linearize - convert paged skb to linear one
 include/linux/skbuff.h-3980- *	@skb: buffer to linarize
 --
 include/linux/skbuff.h-3984- */
 include/linux/skbuff.h:3985:static inline int skb_linearize(struct sk_buff *skb)
 include/linux/skbuff.h-3986-{
 include/linux/skbuff.h:3987:	return skb_is_nonlinear(skb) ? __skb_linearize(skb) : 0;
 include/linux/skbuff.h-3988-}
 --
 include/linux/skbuff.h=3997=static inline bool skb_has_shared_frag(const struct sk_buff *skb)
 --
 include/linux/skbuff.h-4003-/**
 include/linux/skbuff.h:4004: *	skb_linearize_cow - make sure skb is linear and writable
 include/linux/skbuff.h-4005- *	@skb: buffer to process
 --
 include/linux/skbuff.h-4009- */
 include/linux/skbuff.h:4010:static inline int skb_linearize_cow(struct sk_buff *skb)
 include/linux/skbuff.h-4011-{
 include/linux/skbuff.h-4012-	return skb_is_nonlinear(skb) || skb_cloned(skb) ?
 include/linux/skbuff.h:4013:	       __skb_linearize(skb) : 0;
 include/linux/skbuff.h-4014-}
 --
 net/batman-adv/fragmentation.c=136=static bool batadv_frag_insert_packet(struct batadv_orig_node *orig_node,
 --
 net/batman-adv/fragmentation.c-151-	 */
 net/batman-adv/fragmentation.c:152:	if (skb_linearize(skb) < 0)
 net/batman-adv/fragmentation.c-153-		goto err;
 --
 net/batman-adv/fragmentation.c=433=int batadv_frag_send_packet(struct sk_buff *skb,
 --
 net/batman-adv/fragmentation.c-477-	 */
 net/batman-adv/fragmentation.c:478:	if (skb_has_frag_list(skb) && __skb_linearize(skb)) {
 net/batman-adv/fragmentation.c-479-		ret = -ENOMEM;
 --
 net/batman-adv/routing.c=176=bool batadv_check_management_packet(struct sk_buff *skb,
 --
]
]

gemini-3-flash-preview

							input: 74378
							output: 33
							thoughts: 26
						

Here's my thought process, as it went:

**Digging into the TDLS Code**

Okay, the output was cut off, which is frustrating, but expected in debugging. I need to be more targeted in my search. Instead of a general scan, I need to focus in on the likely area for this TDLS issue. Given that we're talking about TDLS, which is a fairly specific 802.11 feature, it makes sense to go straight to the relevant kernel module. My instincts tell me the code responsible is likely within the `net/mac80211` subsystem, because it houses the 802.11 wireless stack. Specifically, I'm betting that the TDLS-specific implementation will be in a file named something like `tdls.c`. I'll start there. Hopefully, that narrow focus will get me the information I need, and quickly.

no matches

map[Expression:skb_linearize.*net/mac80211/tdls.c]

map[Output:]

gemini-3-flash-preview

							input: 74644
							output: 19
							thoughts: 52
						

**Checking My Work on That `grepper` Expression**

Okay, hold on a second. I have a nagging feeling I might have missed something with that initial `grepper` command. Let's not get ahead of ourselves. Instead of relying solely on that potentially flawed expression, I'm going to take a more direct approach. Let me just `grep` for `skb_linearize` and see what the results tell me. My focus right now is really on confirming whether `net/mac80211/tdls.c` turns up. This gives me a quick sanity check to see if the first pass picked up what I was expecting. A direct search for a known function call with a specific file should either validate or expose a flaw in my thinking, and is the quickest way to get a solid answer. Then I'll re-evaluate based on the results.

map[Expression:skb_linearize]

map[Output:
Full output is too long, showing 500 out of 899 lines.
Use more precise expression if possible.

[arch/um/drivers/vector_kern.c=285=static int prep_msg(struct vector_private *vp,
 --
 arch/um/drivers/vector_kern.c-294-	if (nr_frags > MAX_IOV_SIZE) {
 arch/um/drivers/vector_kern.c:295:		if (skb_linearize(skb) != 0)
 arch/um/drivers/vector_kern.c-296-			goto drop;
 --
 drivers/block/aoe/aoecmd.c=1114=noskb:		if (buf)
 --
 drivers/block/aoe/aoecmd.c-1156-		}
 drivers/block/aoe/aoecmd.c:1157:		if (skb_linearize(skb))
 drivers/block/aoe/aoecmd.c-1158-			break;
 --
 drivers/infiniband/sw/rxe/rxe_net.c=214=static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
 --
 drivers/infiniband/sw/rxe/rxe_net.c-229-
 drivers/infiniband/sw/rxe/rxe_net.c:230:	if (skb_linearize(skb)) {
 drivers/infiniband/sw/rxe/rxe_net.c-231-		ib_device_put(&rxe->ib_dev);
 --
 drivers/infiniband/ulp/ipoib/ipoib_cm.c=708=void ipoib_cm_send(struct net_device *dev, struct sk_buff *skb, struct ipoib_cm_tx *tx)
 --
 drivers/infiniband/ulp/ipoib/ipoib_cm.c-723-	if (skb_shinfo(skb)->nr_frags > usable_sge) {
 drivers/infiniband/ulp/ipoib/ipoib_cm.c:724:		if (skb_linearize(skb) < 0) {
 drivers/infiniband/ulp/ipoib/ipoib_cm.c-725-			ipoib_warn(priv, "skb could not be linearized\n");
 --
 drivers/infiniband/ulp/ipoib/ipoib_cm.c-730-		}
 drivers/infiniband/ulp/ipoib/ipoib_cm.c:731:		/* Does skb_linearize return ok without reducing nr_frags? */
 drivers/infiniband/ulp/ipoib/ipoib_cm.c-732-		if (skb_shinfo(skb)->nr_frags > usable_sge) {
 --
 drivers/infiniband/ulp/ipoib/ipoib_ib.c=591=int ipoib_send(struct net_device *dev, struct sk_buff *skb,
 --
 drivers/infiniband/ulp/ipoib/ipoib_ib.c-622-	if (skb_shinfo(skb)->nr_frags > usable_sge) {
 drivers/infiniband/ulp/ipoib/ipoib_ib.c:623:		if (skb_linearize(skb) < 0) {
 drivers/infiniband/ulp/ipoib/ipoib_ib.c-624-			ipoib_warn(priv, "skb could not be linearized\n");
 --
 drivers/infiniband/ulp/ipoib/ipoib_ib.c-629-		}
 drivers/infiniband/ulp/ipoib/ipoib_ib.c:630:		/* Does skb_linearize return ok without reducing nr_frags? */
 drivers/infiniband/ulp/ipoib/ipoib_ib.c-631-		if (skb_shinfo(skb)->nr_frags > usable_sge) {
 --
 drivers/net/ethernet/agere/et131x.c=3796=static netdev_tx_t et131x_tx(struct sk_buff *skb, struct net_device *netdev)
 --
 drivers/net/ethernet/agere/et131x.c-3804-	if (unlikely(skb_shinfo(skb)->nr_frags > MAX_TX_DESC_PER_PKT - 2)) {
 drivers/net/ethernet/agere/et131x.c:3805:		if (skb_linearize(skb))
 drivers/net/ethernet/agere/et131x.c-3806-			goto drop_err;
 --
 drivers/net/ethernet/amazon/ena/ena_netdev.c=2472=static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
 --
 drivers/net/ethernet/amazon/ena/ena_netdev.c-2488-
 drivers/net/ethernet/amazon/ena/ena_netdev.c:2489:	rc = skb_linearize(skb);
 drivers/net/ethernet/amazon/ena/ena_netdev.c-2490-	if (unlikely(rc)) {
 --
 drivers/net/ethernet/amd/xgbe/xgbe-selftest.c=32=static int xgbe_test_loopback_validate(struct sk_buff *skb,
 --
 drivers/net/ethernet/amd/xgbe/xgbe-selftest.c-57-
 drivers/net/ethernet/amd/xgbe/xgbe-selftest.c:58:	if (skb_linearize(skb))
 drivers/net/ethernet/amd/xgbe/xgbe-selftest.c-59-		goto out;
 --
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c=307=static int xgene_enet_work_msg(struct sk_buff *skb, u64 *hopinfo)
 --
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c-347-				if (unlikely(hdr_len > len)) {
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c:348:					if (skb_linearize(skb))
 drivers/net/ethernet/apm/xgene/xgene_enet_main.c-349-						return 0;
 --
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c=3751=netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c-3836-		bp->lin_cnt++;
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c:3837:		if (skb_linearize(skb) != 0) {
 drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c-3838-			DP(NETIF_MSG_TX_QUEUED,
 --
 drivers/net/ethernet/broadcom/bnxt/bnxt.c=469=static netdev_tx_t bnxt_start_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/ethernet/broadcom/bnxt/bnxt.c-501-				 skb_shinfo(skb)->nr_frags, TX_MAX_FRAGS);
 drivers/net/ethernet/broadcom/bnxt/bnxt.c:502:		if (skb_linearize(skb)) {
 drivers/net/ethernet/broadcom/bnxt/bnxt.c-503-			dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/cisco/enic/enic_main.c=833=static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/cisco/enic/enic_main.c-858-	    skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 drivers/net/ethernet/cisco/enic/enic_main.c:859:	    skb_linearize(skb)) {
 drivers/net/ethernet/cisco/enic/enic_main.c-860-		dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/cortina/gemini.c=1271=static netdev_tx_t gmac_start_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/cortina/gemini.c-1319-	if (gmac_map_tx_bufs(netdev, skb, txq, &w)) {
 drivers/net/ethernet/cortina/gemini.c:1320:		if (skb_linearize(skb))
 drivers/net/ethernet/cortina/gemini.c-1321-			goto out_drop;
 --
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c=2294=dpaa_start_xmit(struct sk_buff *skb, struct net_device *net_dev)
 --
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c-2339-		 */
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c:2340:		if (__skb_linearize(skb))
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c-2341-			goto enomem;
 --
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c=1082=static netdev_tx_t dpaa2_switch_port_tx(struct sk_buff *skb,
 --
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c-1113-	 */
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c:1114:	err = skb_linearize(skb);
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c-1115-	if (err) {
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c:1116:		net_err_ratelimited("%s: skb_linearize error (%d)!\n", net_dev->name, err);
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c-1117-		goto err_free_skb;
 --
 drivers/net/ethernet/freescale/enetc/enetc.c=977=static netdev_tx_t enetc_start_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/freescale/enetc/enetc.c-1018-		if (unlikely(skb_shinfo(skb)->nr_frags > priv->max_frags))
 drivers/net/ethernet/freescale/enetc/enetc.c:1019:			if (unlikely(skb_linearize(skb)))
 drivers/net/ethernet/freescale/enetc/enetc.c-1020-				goto drop_packet_err;
 --
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c=424=static struct sk_buff *tx_skb_align_workaround(struct net_device *dev,
 --
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-428-
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c:429:	if (skb_linearize(skb))
 drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c-430-		return NULL;
 --
 drivers/net/ethernet/google/gve/gve_tx_dqo.c=967=static int gve_try_tx_skb(struct gve_priv *priv, struct gve_tx_ring *tx,
 --
 drivers/net/ethernet/google/gve/gve_tx_dqo.c-985-			if (unlikely(num_buffer_descs > GVE_TX_MAX_DATA_DESCS)) {
 drivers/net/ethernet/google/gve/gve_tx_dqo.c:986:				if (unlikely(skb_linearize(skb) < 0))
 drivers/net/ethernet/google/gve/gve_tx_dqo.c-987-					goto drop;
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c=1904=void hns3_shinfo_pack(struct skb_shared_info *shinfo, __u32 *size)
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1911-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c:1912:static int hns3_skb_linearize(struct hns3_enet_ring *ring,
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1913-			      struct sk_buff *skb,
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1932-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c:1933:	if (__skb_linearize(skb)) {
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1934-		hns3_ring_stats_update(ring, sw_err_cnt);
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c=1941=static int hns3_nic_maybe_stop_tx(struct hns3_enet_ring *ring,
 --
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1958-
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c:1959:		if (hns3_skb_linearize(ring, skb, bd_num))
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c-1960-			return -ENOMEM;
 --
 drivers/net/ethernet/intel/i40e/i40e_txrx.c=3868=static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb,
 --
 drivers/net/ethernet/intel/i40e/i40e_txrx.c-3887-	if (i40e_chk_linearize(skb, count)) {
 drivers/net/ethernet/intel/i40e/i40e_txrx.c:3888:		if (__skb_linearize(skb)) {
 drivers/net/ethernet/intel/i40e/i40e_txrx.c-3889-			dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/intel/iavf/iavf_txrx.c=2291=static netdev_tx_t iavf_xmit_frame_ring(struct sk_buff *skb,
 --
 drivers/net/ethernet/intel/iavf/iavf_txrx.c-2310-	if (iavf_chk_linearize(skb, count)) {
 drivers/net/ethernet/intel/iavf/iavf_txrx.c:2311:		if (__skb_linearize(skb)) {
 drivers/net/ethernet/intel/iavf/iavf_txrx.c-2312-			dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/intel/ice/ice_txrx.c=2150=ice_xmit_frame_ring(struct sk_buff *skb, struct ice_tx_ring *tx_ring)
 --
 drivers/net/ethernet/intel/ice/ice_txrx.c-2162-	if (ice_chk_linearize(skb, count)) {
 drivers/net/ethernet/intel/ice/ice_txrx.c:2163:		if (__skb_linearize(skb))
 drivers/net/ethernet/intel/ice/ice_txrx.c-2164-			goto out_drop;
 --
 drivers/net/ethernet/intel/idpf/idpf_txrx.c=2502=unsigned int idpf_tx_res_count_required(struct idpf_tx_queue *txq,
 --
 drivers/net/ethernet/intel/idpf/idpf_txrx.c-2531-	if (idpf_chk_linearize(skb, txq->tx_max_bufs, count)) {
 drivers/net/ethernet/intel/idpf/idpf_txrx.c:2532:		if (__skb_linearize(skb))
 drivers/net/ethernet/intel/idpf/idpf_txrx.c-2533-			return 0;
 --
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c=383=int ixgbe_fcoe_ddp(struct ixgbe_adapter *adapter,
 --
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c-469-	    (fctl & FC_FC_END_SEQ)) {
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c:470:		skb_linearize(skb);
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c-471-		crc = skb_put(skb, sizeof(*crc));
 --
 drivers/net/ethernet/marvell/mv643xx_eth.c=993=static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/ethernet/marvell/mv643xx_eth.c-1003-
 drivers/net/ethernet/marvell/mv643xx_eth.c:1004:	if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
 drivers/net/ethernet/marvell/mv643xx_eth.c-1005-		netdev_printk(KERN_DEBUG, dev,
 --
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c=1189=bool otx2_sq_append_skb(void *dev, struct netdev_queue *txq,
 --
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c-1214-	if (unlikely(num_segs > OTX2_MAX_FRAGS_IN_SQE)) {
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c:1215:		if (__skb_linearize(skb)) {
 drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c-1216-			dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c=158=mlx5e_test_loopback_validate(struct sk_buff *skb,
 --
 drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c-168-
 drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c:169:	if (skb_linearize(skb))
 drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c-170-		goto out;
 --
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_tx.c=191=netdev_tx_t mlxbf_gige_start_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_tx.c-202-	/* If needed, linearize TX SKB as hardware DMA expects this */
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_tx.c:203:	if (skb->len > MLXBF_GIGE_DEFAULT_BUF_SZ || skb_linearize(skb)) {
 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_tx.c-204-		dev_kfree_skb(skb);
 --
 drivers/net/ethernet/mellanox/mlxsw/pci.c=2157=static int mlxsw_pci_skb_transmit(void *bus_priv, struct sk_buff *skb,
 --
 drivers/net/ethernet/mellanox/mlxsw/pci.c-2171-	if (skb_shinfo(skb)->nr_frags > MLXSW_PCI_WQE_SG_ENTRIES - 1) {
 drivers/net/ethernet/mellanox/mlxsw/pci.c:2172:		err = skb_linearize(skb);
 drivers/net/ethernet/mellanox/mlxsw/pci.c-2173-		if (err)
 --
 drivers/net/ethernet/microchip/lan743x_main.c=2418=lan743x_rx_trim_skb(struct sk_buff *skb, int frame_length)
 drivers/net/ethernet/microchip/lan743x_main.c-2419-{
 drivers/net/ethernet/microchip/lan743x_main.c:2420:	if (skb_linearize(skb)) {
 drivers/net/ethernet/microchip/lan743x_main.c-2421-		dev_kfree_skb_irq(skb);
 --
 drivers/net/ethernet/microsoft/mana/mana_en.c=335=netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 --
 drivers/net/ethernet/microsoft/mana/mana_en.c-368-		 */
 drivers/net/ethernet/microsoft/mana/mana_en.c:369:		if (skb_linearize(skb)) {
 drivers/net/ethernet/microsoft/mana/mana_en.c-370-			netdev_warn_once(ndev, "Failed to linearize skb with nr_frags=%d and is_gso=%d\n",
 --
 drivers/net/ethernet/microsoft/mana/mana_en.c=564=static netdev_features_t mana_features_check(struct sk_buff *skb,
 --
 drivers/net/ethernet/microsoft/mana/mana_en.c-573-		 * Non-GSO case:
 drivers/net/ethernet/microsoft/mana/mana_en.c:574:		 *   The xmit path will attempt skb_linearize() as a fallback.
 drivers/net/ethernet/microsoft/mana/mana_en.c-575-		 */
 --
 drivers/net/ethernet/mscc/ocelot_fdma.c=640=static int ocelot_fdma_prepare_skb(struct ocelot *ocelot, int port, u32 rew_op,
 --
 drivers/net/ethernet/mscc/ocelot_fdma.c-657-
 drivers/net/ethernet/mscc/ocelot_fdma.c:658:	err = skb_linearize(skb);
 drivers/net/ethernet/mscc/ocelot_fdma.c-659-	if (err) {
 drivers/net/ethernet/mscc/ocelot_fdma.c:660:		net_err_ratelimited("%s: skb_linearize error (%d)!\n",
 drivers/net/ethernet/mscc/ocelot_fdma.c-661-				    dev->name, err);
 --
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c=2644=static netdev_tx_t myri10ge_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c-2898-
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c:2899:	if (skb_linearize(skb))
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c-2900-		goto drop;
 --
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c=119=nfp_nfdk_tx_maybe_close_block(struct nfp_net_tx_ring *tx_ring,
 --
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c-139-		if (skb_is_nonlinear(skb)) {
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c:140:			err = skb_linearize(skb);
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c-141-			if (err)
 --
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c=253=netdev_tx_t nfp_nfdk_tx(struct sk_buff *skb, struct net_device *netdev)
 --
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c-295-
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c:296:	/* nr_frags will change after skb_linearize so we get nr_frags after
 drivers/net/ethernet/netronome/nfp/nfdk/dp.c-297-	 * nfp_nfdk_tx_maybe_close_block function
 --
 drivers/net/ethernet/oa_tc6.c=1203=netdev_tx_t oa_tc6_start_xmit(struct oa_tc6 *tc6, struct sk_buff *skb)
 --
 drivers/net/ethernet/oa_tc6.c-1209-
 drivers/net/ethernet/oa_tc6.c:1210:	if (skb_linearize(skb)) {
 drivers/net/ethernet/oa_tc6.c-1211-		dev_kfree_skb_any(skb);
 --
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c=1678=static int ionic_tx_descs_needed(struct ionic_queue *q, struct sk_buff *skb)
 --
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c-1756-	if (too_many_frags) {
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c:1757:		err = skb_linearize(skb);
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c-1758-		if (unlikely(err))
 --
 drivers/net/ethernet/qlogic/qede/qede_fp.c=1479=netdev_tx_t qede_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 --
 drivers/net/ethernet/qlogic/qede/qede_fp.c-1508-	if (qede_pkt_req_lin(skb, xmit_type)) {
 drivers/net/ethernet/qlogic/qede/qede_fp.c:1509:		if (skb_linearize(skb)) {
 drivers/net/ethernet/qlogic/qede/qede_fp.c-1510-			txq->tx_mem_alloc_err++;
 --
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c=200=rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb)
 --
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c-208-
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:209:	if (skb_linearize(skb)) {
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c-210-		kfree_skb(skb);
 --
 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c=533=static void rmnet_send_skb(struct rmnet_port *port, struct sk_buff *skb)
 --
 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c-535-	if (skb_needs_linearize(skb, port->dev->features)) {
 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:536:		if (unlikely(__skb_linearize(skb))) {
 drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c-537-			struct rmnet_priv *priv;
 --
 drivers/net/ethernet/rocker/rocker_main.c=1880=static netdev_tx_t rocker_port_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/ethernet/rocker/rocker_main.c-1905-	if (skb_shinfo(skb)->nr_frags > ROCKER_TX_FRAGS_MAX) {
 drivers/net/ethernet/rocker/rocker_main.c:1906:		err = skb_linearize(skb);
 drivers/net/ethernet/rocker/rocker_main.c-1907-		if (err)
 --
 drivers/net/ethernet/sfc/ptp.c=1122=static void efx_ptp_xmit_skb_mc(struct efx_nic *efx, struct sk_buff *skb)
 --
 drivers/net/ethernet/sfc/ptp.c-1133-	if (skb_shinfo(skb)->nr_frags != 0) {
 drivers/net/ethernet/sfc/ptp.c:1134:		rc = skb_linearize(skb);
 drivers/net/ethernet/sfc/ptp.c-1135-		if (rc != 0)
 --
 drivers/net/ethernet/sfc/siena/ptp.c=1104=static void efx_ptp_xmit_skb_mc(struct efx_nic *efx, struct sk_buff *skb)
 --
 drivers/net/ethernet/sfc/siena/ptp.c-1115-	if (skb_shinfo(skb)->nr_frags != 0) {
 drivers/net/ethernet/sfc/siena/ptp.c:1116:		rc = skb_linearize(skb);
 drivers/net/ethernet/sfc/siena/ptp.c-1117-		if (rc != 0)
 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c=246=static int stmmac_test_loopback_validate(struct sk_buff *skb,
 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c-263-
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c:264:	if (skb_linearize(skb))
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c-265-		goto out;
 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c=835=static int stmmac_test_vlan_validate(struct sk_buff *skb,
 --
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c-852-
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c:853:	if (skb_linearize(skb))
 drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c-854-		goto out;
 --
 drivers/net/ethernet/tehuti/tn40.c=574=static int tn40_tx_map_skb(struct tn40_priv *priv, struct sk_buff *skb,
 --
 drivers/net/ethernet/tehuti/tn40.c-587-	if (nr_frags > TN40_MAX_PBL - 1) {
 drivers/net/ethernet/tehuti/tn40.c:588:		ret = skb_linearize(skb);
 drivers/net/ethernet/tehuti/tn40.c-589-		if (ret)
 --
 drivers/net/ethernet/via/via-velocity.c=2532=static netdev_tx_t velocity_xmit(struct sk_buff *skb,
 --
 drivers/net/ethernet/via/via-velocity.c-2548-	 * the skb if there are more */
 drivers/net/ethernet/via/via-velocity.c:2549:	if (skb_shinfo(skb)->nr_frags > 6 && __skb_linearize(skb)) {
 drivers/net/ethernet/via/via-velocity.c-2550-		dev_kfree_skb_any(skb);
 --
 drivers/net/hyperv/netvsc_drv.c=442=static int netvsc_xmit(struct sk_buff *skb, struct net_device *net, bool xdp_tx)
 --
 drivers/net/hyperv/netvsc_drv.c-474-
 drivers/net/hyperv/netvsc_drv.c:475:		if (skb_linearize(skb))
 drivers/net/hyperv/netvsc_drv.c-476-			goto no_memory;
 --
 drivers/net/ipa/ipa_endpoint.c=1236=int ipa_endpoint_skb_tx(struct ipa_endpoint *endpoint, struct sk_buff *skb)
 --
 drivers/net/ipa/ipa_endpoint.c-1247-	if (nr_frags > endpoint->skb_frag_max) {
 drivers/net/ipa/ipa_endpoint.c:1248:		if (skb_linearize(skb))
 drivers/net/ipa/ipa_endpoint.c-1249-			return -E2BIG;
 --
 drivers/net/netdevsim/netdev.c=123=static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/netdevsim/netdev.c-163-	      cfg->hds_thresh > len)))
 drivers/net/netdevsim/netdev.c:164:		skb_linearize(skb);
 drivers/net/netdevsim/netdev.c-165-
 --
 drivers/net/ppp/ppp_generic.c=1707=pad_compress_skb(struct ppp *ppp, struct sk_buff *skb)
 --
 drivers/net/ppp/ppp_generic.c-1715-
 drivers/net/ppp/ppp_generic.c:1716:	if (skb_linearize(skb))
 drivers/net/ppp/ppp_generic.c-1717-		return NULL;
 --
 drivers/net/ppp/ppp_generic.c=1765=ppp_send_frame(struct ppp *ppp, struct sk_buff *skb)
 --
 drivers/net/ppp/ppp_generic.c-1806-
 drivers/net/ppp/ppp_generic.c:1807:		if (skb_linearize(skb))
 drivers/net/ppp/ppp_generic.c-1808-			goto drop;
 --
 drivers/net/ppp/ppp_generic.c=1889=ppp_push(struct ppp *ppp)
 --
 drivers/net/ppp/ppp_generic.c-1913-		chan = pch->chan;
 drivers/net/ppp/ppp_generic.c:1914:		if (unlikely(!chan || (!chan->direct_xmit && skb_linearize(skb)))) {
 drivers/net/ppp/ppp_generic.c-1915-			/* channel got unregistered, or it requires a linear
 --
 drivers/net/ppp/ppp_generic.c=1952=static int ppp_mp_explode(struct ppp *ppp, struct sk_buff *skb)
 --
 drivers/net/ppp/ppp_generic.c-2010-	/* Do protocol field compression */
 drivers/net/ppp/ppp_generic.c:2011:	if (skb_linearize(skb))
 drivers/net/ppp/ppp_generic.c-2012-		goto err_linearize;
 --
 drivers/net/usb/aqc111.c=1181=static struct sk_buff *aqc111_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
 --
 drivers/net/usb/aqc111.c-1216-	if (!dev->can_dma_sg && (dev->net->features & NETIF_F_SG) &&
 drivers/net/usb/aqc111.c:1217:	    skb_linearize(skb))
 drivers/net/usb/aqc111.c-1218-		return NULL;
 --
 drivers/net/usb/ax88179_178a.c=1476=ax88179_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
 --
 drivers/net/usb/ax88179_178a.c-1489-
 drivers/net/usb/ax88179_178a.c:1490:	if ((dev->net->features & NETIF_F_SG) && skb_linearize(skb))
 drivers/net/usb/ax88179_178a.c-1491-		return NULL;
 --
 drivers/net/usb/lan78xx.c=511=static int lan78xx_alloc_buf_pool(struct sk_buff_head *buf_pool,
 --
 drivers/net/usb/lan78xx.c-526-
 drivers/net/usb/lan78xx.c:527:		if (skb_linearize(buf) != 0) {
 drivers/net/usb/lan78xx.c-528-			dev_kfree_skb_any(buf);
 --
 drivers/net/vmxnet3/vmxnet3_drv.c=1146=vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
 --
 drivers/net/vmxnet3/vmxnet3_drv.c-1179-			 */
 drivers/net/vmxnet3/vmxnet3_drv.c:1180:			if (skb_linearize(skb) != 0) {
 drivers/net/vmxnet3/vmxnet3_drv.c-1181-				tq->stats.drop_too_many_frags++;
 --
 drivers/net/vmxnet3/vmxnet3_drv.c-1203-			 */
 drivers/net/vmxnet3/vmxnet3_drv.c:1204:			if (skb_linearize(skb) != 0) {
 drivers/net/vmxnet3/vmxnet3_drv.c-1205-				tq->stats.drop_too_many_frags++;
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c=2119=static int brcmf_sdio_txpkt_prep_sg(struct brcmf_sdio *bus,
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c-2166-				return -ENOMEM;
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c:2167:		if (skb_linearize(pkt))
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c-2168-			return -ENOMEM;
 --
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx-gen2.c=717=int iwl_txq_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
 --
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx-gen2.c-736-	    skb_shinfo(skb)->nr_frags > IWL_TRANS_PCIE_MAX_FRAGS(trans_pcie) &&
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx-gen2.c:737:	    __skb_linearize(skb))
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx-gen2.c-738-		return -ENOMEM;
 --
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c=2108=int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb,
 --
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c-2133-	    skb_shinfo(skb)->nr_frags > IWL_TRANS_PCIE_MAX_FRAGS(trans_pcie) &&
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c:2134:	    __skb_linearize(skb))
 drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/tx.c-2135-		return -ENOMEM;
 --
 drivers/net/wireless/mediatek/mt76/dma.c=637=mt76_dma_tx_queue_skb(struct mt76_phy *phy, struct mt76_queue *q,
 --
 drivers/net/wireless/mediatek/mt76/dma.c-658-	/* TODO: Take into account unlinear skbs */
 drivers/net/wireless/mediatek/mt76/dma.c:659:	if (mt76_npu_device_active(dev) && skb_linearize(skb))
 drivers/net/wireless/mediatek/mt76/dma.c-660-		goto free_skb;
 --
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c=353=void mt7921_mcu_rx_event(struct mt792x_dev *dev, struct sk_buff *skb)
 --
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c-356-
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c:357:	if (skb_linearize(skb))
 drivers/net/wireless/mediatek/mt76/mt7921/mcu.c-358-		return;
 --
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c=609=void mt7925_mcu_rx_event(struct mt792x_dev *dev, struct sk_buff *skb)
 --
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c-612-
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c:613:	if (skb_linearize(skb))
 drivers/net/wireless/mediatek/mt76/mt7925/mcu.c-614-		return;
 --
 drivers/net/xen-netfront.c=706=static netdev_tx_t xennet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/net/xen-netfront.c-746-				    slots, skb->len);
 drivers/net/xen-netfront.c:747:		if (skb_linearize(skb))
 drivers/net/xen-netfront.c-748-			goto drop;
 --
 drivers/s390/net/qeth_core_main.c=3950=static int qeth_add_hw_header(struct qeth_qdio_out_q *queue,
 --
 drivers/s390/net/qeth_core_main.c-3993-
 drivers/s390/net/qeth_core_main.c:3994:		rc = skb_linearize(skb);
 drivers/s390/net/qeth_core_main.c-3995-		if (rc) {
 --
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c=503=static void bnx2fc_recv_frame(struct sk_buff *skb)
 --
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c-528-	if (skb_is_nonlinear(skb))
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c:529:		skb_linearize(skb);
 drivers/scsi/bnx2fc/bnx2fc_fcoe.c-530-	mac = eth_hdr(skb)->h_source;
 --
 drivers/scsi/fcoe/fcoe.c=1627=static void fcoe_recv_frame(struct sk_buff *skb)
 --
 drivers/scsi/fcoe/fcoe.c-1650-
 drivers/scsi/fcoe/fcoe.c:1651:	skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */
 drivers/scsi/fcoe/fcoe.c-1652-
 --
 drivers/scsi/fcoe/fcoe_ctlr.c=1528=static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
 --
 drivers/scsi/fcoe/fcoe_ctlr.c-1536-
 drivers/scsi/fcoe/fcoe_ctlr.c:1537:	if (skb_linearize(skb))
 drivers/scsi/fcoe/fcoe_ctlr.c-1538-		goto drop;
 --
 drivers/scsi/qedf/qedf_main.c=2470=static void qedf_recv_frame(struct qedf_ctx *qedf,
 --
 drivers/scsi/qedf/qedf_main.c-2492-	if (skb_is_nonlinear(skb))
 drivers/scsi/qedf/qedf_main.c:2493:		skb_linearize(skb);
 drivers/scsi/qedf/qedf_main.c-2494-	mac = eth_hdr(skb)->h_source;
 --
 drivers/staging/octeon/ethernet-tx.c=126=netdev_tx_t cvm_oct_xmit(struct sk_buff *skb, struct net_device *dev)
 --
 drivers/staging/octeon/ethernet-tx.c-189-	if (unlikely(skb_shinfo(skb)->nr_frags > 5)) {
 drivers/staging/octeon/ethernet-tx.c:190:		if (unlikely(__skb_linearize(skb))) {
 drivers/staging/octeon/ethernet-tx.c-191-			queue_type = QUEUE_DROP;
 --
 include/linux/skbuff.h=3967=static inline bool skb_can_coalesce(struct sk_buff *skb, int i,
 --
 include/linux/skbuff.h-3972-
 include/linux/skbuff.h:3973:static inline int __skb_linearize(struct sk_buff *skb)
 include/linux/skbuff.h-3974-{
 --
 include/linux/skbuff.h-3978-/**
 include/linux/skbuff.h:3979: *	skb_linearize - convert paged skb to linear one
 include/linux/skbuff.h-3980- *	@skb: buffer to linarize
 --
 include/linux/skbuff.h-3984- */
 include/linux/skbuff.h:3985:static inline int skb_linearize(struct sk_buff *skb)
 include/linux/skbuff.h-3986-{
 include/linux/skbuff.h:3987:	return skb_is_nonlinear(skb) ? __skb_linearize(skb) : 0;
 include/linux/skbuff.h-3988-}
 --
 include/linux/skbuff.h=3997=static inline bool skb_has_shared_frag(const struct sk_buff *skb)
 --
 include/linux/skbuff.h-4003-/**
 include/linux/skbuff.h:4004: *	skb_linearize_cow - make sure skb is linear and writable
 include/linux/skbuff.h-4005- *	@skb: buffer to process
 --
 include/linux/skbuff.h-4009- */
 include/linux/skbuff.h:4010:static inline int skb_linearize_cow(struct sk_buff *skb)
 include/linux/skbuff.h-4011-{
 include/linux/skbuff.h-4012-	return skb_is_nonlinear(skb) || skb_cloned(skb) ?
 include/linux/skbuff.h:4013:	       __skb_linearize(skb) : 0;
 include/linux/skbuff.h-4014-}
 --
 net/batman-adv/fragmentation.c=136=static bool batadv_frag_insert_packet(struct batadv_orig_node *orig_node,
 --
 net/batman-adv/fragmentation.c-151-	 */
 net/batman-adv/fragmentation.c:152:	if (skb_linearize(skb) < 0)
 net/batman-adv/fragmentation.c-153-		goto err;
 --
 net/batman-adv/fragmentation.c=433=int batadv_frag_send_packet(struct sk_buff *skb,
 --
 net/batman-adv/fragmentation.c-477-	 */
 net/batman-adv/fragmentation.c:478:	if (skb_has_frag_list(skb) && __skb_linearize(skb)) {
 net/batman-adv/fragmentation.c-479-		ret = -ENOMEM;
 --
 net/batman-adv/routing.c=176=bool batadv_check_management_packet(struct sk_buff *skb,
 --
]
]

gemini-3-flash-preview

							input: 88262
							output: 28
							thoughts: 109
						

**Examining the Current State of TDLS Channel Switching**

Okay, first things first, I need to confirm whether `net/mac80211/tdls.c` is still in the codebase and understand its current state.  I was about to reach for `codesearch-dir-index`, but hold on... I think I already used `codesearch-definition-source` on that file recently. Let me double check my notes.

Right, moving on. I need to refresh my memory on `ieee80211_process_tdls_channel_switch` specifically, inside `net/mac80211/tdls.c`. I'll open that file again and zero in on the relevant section. I'll read the code surrounding those lines for proper context, since changes in one part can have wide reaching effects on other modules. Understanding the surrounding code will be the key to efficiently analyzing this.

map[File:net/mac80211/tdls.c]

map[Contents:// SPDX-License-Identifier: GPL-2.0-only
/*
 * mac80211 TDLS handling code
 *
 * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2014, Intel Corporation
 * Copyright 2014  Intel Mobile Communications GmbH
 * Copyright 2015 - 2016 Intel Deutschland GmbH
 * Copyright (C) 2019, 2021-2025 Intel Corporation
 */

#include <linux/ieee80211.h>
#include <linux/log2.h>
#include <net/cfg80211.h>
#include <linux/rtnetlink.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
#include "rate.h"
#include "wme.h"

/* give usermode some time for retries in setting up the TDLS session */
#define TDLS_PEER_SETUP_TIMEOUT	(15 * HZ)

void ieee80211_tdls_peer_del_work(struct wiphy *wiphy, struct wiphy_work *wk)
{
	struct ieee80211_sub_if_data *sdata;
	struct ieee80211_local *local;

	sdata = container_of(wk, struct ieee80211_sub_if_data,
			     u.mgd.tdls_peer_del_work.work);
	local = sdata->local;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) {
		tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer);
		sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer);
		eth_zero_addr(sdata->u.mgd.tdls_peer);
	}
}

static void ieee80211_tdls_add_ext_capab(struct ieee80211_link_data *link,
					 struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	bool chan_switch = local->hw.wiphy->features &
			   NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
	bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) &&
			  !ifmgd->tdls_wider_bw_prohibited;
	bool buffer_sta = ieee80211_hw_check(&local->hw,
					     SUPPORTS_TDLS_BUFFER_STA);
	struct ieee80211_supported_band *sband = ieee80211_get_link_sband(link);
	bool vht = sband && sband->vht_cap.vht_supported;
	u8 *pos = skb_put(skb, 10);

	*pos++ = WLAN_EID_EXT_CAPABILITY;
	*pos++ = 8; /* len */
	*pos++ = 0x0;
	*pos++ = 0x0;
	*pos++ = 0x0;
	*pos++ = (chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0) |
		 (buffer_sta ? WLAN_EXT_CAPA4_TDLS_BUFFER_STA : 0);
	*pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED;
	*pos++ = 0;
	*pos++ = 0;
	*pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0;
}

static u8
ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata,
			   struct sk_buff *skb, u16 start, u16 end,
			   u16 spacing)
{
	u8 subband_cnt = 0, ch_cnt = 0;
	struct ieee80211_channel *ch;
	struct cfg80211_chan_def chandef;
	int i, subband_start;
	struct wiphy *wiphy = sdata->local->hw.wiphy;

	for (i = start; i <= end; i += spacing) {
		if (!ch_cnt)
			subband_start = i;

		ch = ieee80211_get_channel(sdata->local->hw.wiphy, i);
		if (ch) {
			/* we will be active on the channel */
			cfg80211_chandef_create(&chandef, ch,
						NL80211_CHAN_NO_HT);
			if (cfg80211_reg_can_beacon_relax(wiphy, &chandef,
							  sdata->wdev.iftype)) {
				ch_cnt++;
				/*
				 * check if the next channel is also part of
				 * this allowed range
				 */
				continue;
			}
		}

		/*
		 * we've reached the end of a range, with allowed channels
		 * found
		 */
		if (ch_cnt) {
			u8 *pos = skb_put(skb, 2);
			*pos++ = ieee80211_frequency_to_channel(subband_start);
			*pos++ = ch_cnt;

			subband_cnt++;
			ch_cnt = 0;
		}
	}

	/* all channels in the requested range are allowed - add them here */
	if (ch_cnt) {
		u8 *pos = skb_put(skb, 2);
		*pos++ = ieee80211_frequency_to_channel(subband_start);
		*pos++ = ch_cnt;

		subband_cnt++;
	}

	return subband_cnt;
}

static void
ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata,
				 struct sk_buff *skb)
{
	/*
	 * Add possible channels for TDLS. These are channels that are allowed
	 * to be active.
	 */
	u8 subband_cnt;
	u8 *pos = skb_put(skb, 2);

	*pos++ = WLAN_EID_SUPPORTED_CHANNELS;

	/*
	 * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as
	 * this doesn't happen in real world scenarios.
	 */

	/* 2GHz, with 5MHz spacing */
	subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5);

	/* 5GHz, with 20MHz spacing */
	subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20);

	/* length */
	*pos = 2 * subband_cnt;
}

static void ieee80211_tdls_add_oper_classes(struct ieee80211_link_data *link,
					    struct sk_buff *skb)
{
	u8 *pos;
	u8 op_class;

	if (!ieee80211_chandef_to_operating_class(&link->conf->chanreq.oper,
						  &op_class))
		return;

	pos = skb_put(skb, 4);
	*pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES;
	*pos++ = 2; /* len */

	*pos++ = op_class;
	*pos++ = op_class; /* give current operating class as alternate too */
}

static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb)
{
	u8 *pos = skb_put(skb, 3);

	*pos++ = WLAN_EID_BSS_COEX_2040;
	*pos++ = 1; /* len */

	*pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST;
}

static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_link_data *link,
					u16 status_code)
{
	struct ieee80211_supported_band *sband;

	/* The capability will be 0 when sending a failure code */
	if (status_code != 0)
		return 0;

	sband = ieee80211_get_link_sband(link);

	if (sband && sband->band == NL80211_BAND_2GHZ) {
		return WLAN_CAPABILITY_SHORT_SLOT_TIME |
		       WLAN_CAPABILITY_SHORT_PREAMBLE;
	}

	return 0;
}

static void ieee80211_tdls_add_link_ie(struct ieee80211_link_data *link,
				       struct sk_buff *skb, const u8 *peer,
				       bool initiator)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_tdls_lnkie *lnkid;
	const u8 *init_addr, *rsp_addr;

	if (initiator) {
		init_addr = sdata->vif.addr;
		rsp_addr = peer;
	} else {
		init_addr = peer;
		rsp_addr = sdata->vif.addr;
	}

	lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));

	lnkid->ie_type = WLAN_EID_LINK_ID;
	lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;

	memcpy(lnkid->bssid, link->u.mgd.bssid, ETH_ALEN);
	memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
	memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
}

static void
ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb)
{
	u8 *pos = skb_put(skb, 4);

	*pos++ = WLAN_EID_AID;
	*pos++ = 2; /* len */
	put_unaligned_le16(sdata->vif.cfg.aid, pos);
}

/* translate numbering in the WMM parameter IE to the mac80211 notation */
static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac)
{
	switch (ac) {
	default:
		WARN_ON_ONCE(1);
		fallthrough;
	case 0:
		return IEEE80211_AC_BE;
	case 1:
		return IEEE80211_AC_BK;
	case 2:
		return IEEE80211_AC_VI;
	case 3:
		return IEEE80211_AC_VO;
	}
}

static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci)
{
	u8 ret;

	ret = aifsn & 0x0f;
	if (acm)
		ret |= 0x10;
	ret |= (aci << 5) & 0x60;
	return ret;
}

static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max)
{
	return ((ilog2(cw_min + 1) << 0x0) & 0x0f) |
	       ((ilog2(cw_max + 1) << 0x4) & 0xf0);
}

static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata,
					    struct sk_buff *skb)
{
	struct ieee80211_wmm_param_ie *wmm;
	struct ieee80211_tx_queue_params *txq;
	int i;

	wmm = skb_put_zero(skb, sizeof(*wmm));

	wmm->element_id = WLAN_EID_VENDOR_SPECIFIC;
	wmm->len = sizeof(*wmm) - 2;

	wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */
	wmm->oui[1] = 0x50;
	wmm->oui[2] = 0xf2;
	wmm->oui_type = 2; /* WME */
	wmm->oui_subtype = 1; /* WME param */
	wmm->version = 1; /* WME ver */
	wmm->qos_info = 0; /* U-APSD not in use */

	/*
	 * Use the EDCA parameters defined for the BSS, or default if the AP
	 * doesn't support it, as mandated by 802.11-2012 section 10.22.4
	 */
	for (i = 0; i < IEEE80211_NUM_ACS; i++) {
		txq = &sdata->deflink.tx_conf[ieee80211_ac_from_wmm(i)];
		wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs,
							       txq->acm, i);
		wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max);
		wmm->ac[i].txop_limit = cpu_to_le16(txq->txop);
	}
}

static void
ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata,
				   struct sta_info *sta)
{
	/* IEEE802.11ac-2013 Table E-4 */
	static const u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 };
	struct cfg80211_chan_def uc = sta->tdls_chandef;
	enum nl80211_chan_width max_width =
		ieee80211_sta_cap_chan_bw(&sta->deflink);
	int i;

	/* only support upgrading non-narrow channels up to 80Mhz */
	if (max_width == NL80211_CHAN_WIDTH_5 ||
	    max_width == NL80211_CHAN_WIDTH_10)
		return;

	if (max_width > NL80211_CHAN_WIDTH_80)
		max_width = NL80211_CHAN_WIDTH_80;

	if (uc.width >= max_width)
		return;
	/*
	 * Channel usage constrains in the IEEE802.11ac-2013 specification only
	 * allow expanding a 20MHz channel to 80MHz in a single way. In
	 * addition, there are no 40MHz allowed channels that are not part of
	 * the allowed 80MHz range in the 5GHz spectrum (the relevant one here).
	 */
	for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++)
		if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) {
			uc.center_freq1 = centers_80mhz[i];
			uc.center_freq2 = 0;
			uc.width = NL80211_CHAN_WIDTH_80;
			break;
		}

	if (!uc.center_freq1)
		return;

	/* proceed to downgrade the chandef until usable or the same as AP BW */
	while (uc.width > max_width ||
	       (uc.width > sta->tdls_chandef.width &&
		!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &uc,
					       sdata->wdev.iftype)))
		ieee80211_chandef_downgrade(&uc, NULL);

	if (!cfg80211_chandef_identical(&uc, &sta->tdls_chandef)) {
		tdls_dbg(sdata, "TDLS ch width upgraded %d -> %d\n",
			 sta->tdls_chandef.width, uc.width);

		/*
		 * the station is not yet authorized when BW upgrade is done,
		 * locking is not required
		 */
		sta->tdls_chandef = uc;
	}
}

static void
ieee80211_tdls_add_setup_start_ies(struct ieee80211_link_data *link,
				   struct sk_buff *skb, const u8 *peer,
				   u8 action_code, bool initiator,
				   const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_supported_band *sband;
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_sta_ht_cap ht_cap;
	struct ieee80211_sta_vht_cap vht_cap;
	const struct ieee80211_sta_he_cap *he_cap;
	const struct ieee80211_sta_eht_cap *eht_cap;
	struct sta_info *sta = NULL;
	size_t offset = 0, noffset;
	u8 *pos;

	sband = ieee80211_get_link_sband(link);
	if (WARN_ON_ONCE(!sband))
		return;

	ieee80211_put_srates_elem(skb, sband, 0, 0, WLAN_EID_SUPP_RATES);
	ieee80211_put_srates_elem(skb, sband, 0, 0, WLAN_EID_EXT_SUPP_RATES);
	ieee80211_tdls_add_supp_channels(sdata, skb);

	/* add any custom IEs that go before Extended Capabilities */
	if (extra_ies_len) {
		static const u8 before_ext_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ext_cap,
					     ARRAY_SIZE(before_ext_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	ieee80211_tdls_add_ext_capab(link, skb);

	/* add the QoS element if we support it */
	if (local->hw.queues >= IEEE80211_NUM_ACS &&
	    action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
		ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */

	/* add any custom IEs that go before HT capabilities */
	if (extra_ies_len) {
		static const u8 before_ht_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ht_cap,
					     ARRAY_SIZE(before_ht_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* we should have the peer STA if we're already responding */
	if (action_code == WLAN_TDLS_SETUP_RESPONSE) {
		sta = sta_info_get(sdata, peer);
		if (WARN_ON_ONCE(!sta))
			return;

		sta->tdls_chandef = link->conf->chanreq.oper;
	}

	ieee80211_tdls_add_oper_classes(link, skb);

	/*
	 * with TDLS we can switch channels, and HT-caps are not necessarily
	 * the same on all bands. The specification limits the setup to a
	 * single HT-cap, so use the current band for now.
	 */
	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));

	if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
	    ht_cap.ht_supported) {
		ieee80211_apply_htcap_overrides(sdata, &ht_cap);

		/* disable SMPS in TDLS initiator */
		ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED
				<< IEEE80211_HT_CAP_SM_PS_SHIFT;

		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
		ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
	} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
		   ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
		/* the peer caps are already intersected with our own */
		memcpy(&ht_cap, &sta->sta.deflink.ht_cap, sizeof(ht_cap));

		pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
		ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap);
	}

	if (ht_cap.ht_supported &&
	    (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40))
		ieee80211_tdls_add_bss_coex_ie(skb);

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* add any custom IEs that go before VHT capabilities */
	if (extra_ies_len) {
		static const u8 before_vht_cap[] = {
			WLAN_EID_SUPP_RATES,
			WLAN_EID_COUNTRY,
			WLAN_EID_EXT_SUPP_RATES,
			WLAN_EID_SUPPORTED_CHANNELS,
			WLAN_EID_RSN,
			WLAN_EID_EXT_CAPABILITY,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
			WLAN_EID_MULTI_BAND,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_vht_cap,
					     ARRAY_SIZE(before_vht_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* add AID if VHT, HE or EHT capabilities supported */
	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
	he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
	eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif);
	if ((vht_cap.vht_supported || he_cap || eht_cap) &&
	    (action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_TDLS_SETUP_RESPONSE))
		ieee80211_tdls_add_aid(sdata, skb);

	/* build the VHT-cap similarly to the HT-cap */
	if ((action_code == WLAN_TDLS_SETUP_REQUEST ||
	     action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) &&
	    vht_cap.vht_supported) {
		ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);

		pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
		ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);
	} else if (action_code == WLAN_TDLS_SETUP_RESPONSE &&
		   vht_cap.vht_supported && sta->sta.deflink.vht_cap.vht_supported) {
		/* the peer caps are already intersected with our own */
		memcpy(&vht_cap, &sta->sta.deflink.vht_cap, sizeof(vht_cap));

		pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
		ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap);

		/*
		 * if both peers support WIDER_BW, we can expand the chandef to
		 * a wider compatible one, up to 80MHz
		 */
		if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
	}

	/* add any custom IEs that go before HE capabilities */
	if (extra_ies_len) {
		static const u8 before_he_cap[] = {
			WLAN_EID_EXTENSION,
			WLAN_EID_EXT_FILS_REQ_PARAMS,
			WLAN_EID_AP_CSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_he_cap,
					     ARRAY_SIZE(before_he_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* build the HE-cap from sband */
	if (action_code == WLAN_TDLS_SETUP_REQUEST ||
	    action_code == WLAN_TDLS_SETUP_RESPONSE ||
	    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
		ieee80211_put_he_cap(skb, sdata, sband, NULL);

		/* Build HE 6Ghz capa IE from sband */
		if (sband->band == NL80211_BAND_6GHZ)
			ieee80211_put_he_6ghz_cap(skb, sdata, link->smps_mode);
	}

	/* add any custom IEs that go before EHT capabilities */
	if (extra_ies_len) {
		static const u8 before_he_cap[] = {
			WLAN_EID_EXTENSION,
			WLAN_EID_EXT_FILS_REQ_PARAMS,
			WLAN_EID_AP_CSN,
		};

		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_he_cap,
					     ARRAY_SIZE(before_he_cap),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* build the EHT-cap from sband */
	if (action_code == WLAN_TDLS_SETUP_REQUEST ||
	    action_code == WLAN_TDLS_SETUP_RESPONSE ||
	    action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES)
		ieee80211_put_eht_cap(skb, sdata, sband, NULL);

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}

}

static void
ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
				 struct sk_buff *skb, const u8 *peer,
				 bool initiator, const u8 *extra_ies,
				 size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct ieee80211_local *local = sdata->local;
	size_t offset = 0, noffset;
	struct sta_info *sta, *ap_sta;
	struct ieee80211_supported_band *sband;
	u8 *pos;

	sband = ieee80211_get_link_sband(link);
	if (WARN_ON_ONCE(!sband))
		return;

	sta = sta_info_get(sdata, peer);
	ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);

	if (WARN_ON_ONCE(!sta || !ap_sta))
		return;

	sta->tdls_chandef = link->conf->chanreq.oper;

	/* add any custom IEs that go before the QoS IE */
	if (extra_ies_len) {
		static const u8 before_qos[] = {
			WLAN_EID_RSN,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_qos,
					     ARRAY_SIZE(before_qos),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/* add the QoS param IE if both the peer and we support it */
	if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
		ieee80211_tdls_add_wmm_param_ie(sdata, skb);

	/* add any custom IEs that go before HT operation */
	if (extra_ies_len) {
		static const u8 before_ht_op[] = {
			WLAN_EID_RSN,
			WLAN_EID_QOS_CAPA,
			WLAN_EID_FAST_BSS_TRANSITION,
			WLAN_EID_TIMEOUT_INTERVAL,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_ht_op,
					     ARRAY_SIZE(before_ht_op),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	/*
	 * if HT support is only added in TDLS, we need an HT-operation IE.
	 * add the IE as required by IEEE802.11-2012 9.23.3.2.
	 */
	if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
		u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
			   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
			   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;

		pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
		ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
					   &link->conf->chanreq.oper, prot,
					   true);
	}

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* only include VHT-operation if not on the 2.4GHz band */
	if (sband->band != NL80211_BAND_2GHZ &&
	    sta->sta.deflink.vht_cap.vht_supported) {
		/*
		 * if both peers support WIDER_BW, we can expand the chandef to
		 * a wider compatible one, up to 80MHz
		 */
		if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
			ieee80211_tdls_chandef_vht_upgrade(sdata, sta);

		pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
		ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
					    &sta->tdls_chandef);
	}

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}
}

static void
ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_link_data *link,
				       struct sk_buff *skb, const u8 *peer,
				       bool initiator, const u8 *extra_ies,
				       size_t extra_ies_len, u8 oper_class,
				       struct cfg80211_chan_def *chandef)
{
	struct ieee80211_tdls_data *tf;
	size_t offset = 0, noffset;

	if (WARN_ON_ONCE(!chandef))
		return;

	tf = (void *)skb->data;
	tf->u.chan_switch_req.target_channel =
		ieee80211_frequency_to_channel(chandef->chan->center_freq);
	tf->u.chan_switch_req.oper_class = oper_class;

	if (extra_ies_len) {
		static const u8 before_lnkie[] = {
			WLAN_EID_SECONDARY_CHANNEL_OFFSET,
		};
		noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
					     before_lnkie,
					     ARRAY_SIZE(before_lnkie),
					     offset);
		skb_put_data(skb, extra_ies + offset, noffset - offset);
		offset = noffset;
	}

	ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	/* add any remaining IEs */
	if (extra_ies_len) {
		noffset = extra_ies_len;
		skb_put_data(skb, extra_ies + offset, noffset - offset);
	}
}

static void
ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_link_data *link,
					struct sk_buff *skb, const u8 *peer,
					u16 status_code, bool initiator,
					const u8 *extra_ies,
					size_t extra_ies_len)
{
	if (status_code == 0)
		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);

	if (extra_ies_len)
		skb_put_data(skb, extra_ies, extra_ies_len);
}

static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
				   struct sk_buff *skb, const u8 *peer,
				   u8 action_code, u16 status_code,
				   bool initiator, const u8 *extra_ies,
				   size_t extra_ies_len, u8 oper_class,
				   struct cfg80211_chan_def *chandef)
{
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		if (status_code == 0)
			ieee80211_tdls_add_setup_start_ies(link,
							   skb, peer,
							   action_code,
							   initiator,
							   extra_ies,
							   extra_ies_len);
		break;
	case WLAN_TDLS_SETUP_CONFIRM:
		if (status_code == 0)
			ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
							 initiator, extra_ies,
							 extra_ies_len);
		break;
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_DISCOVERY_REQUEST:
		if (extra_ies_len)
			skb_put_data(skb, extra_ies, extra_ies_len);
		if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
			ieee80211_tdls_add_link_ie(link, skb,
						   peer, initiator);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		ieee80211_tdls_add_chan_switch_req_ies(link, skb, peer,
						       initiator, extra_ies,
						       extra_ies_len,
						       oper_class, chandef);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ieee80211_tdls_add_chan_switch_resp_ies(link, skb, peer,
							status_code,
							initiator, extra_ies,
							extra_ies_len);
		break;
	}

}

static int
ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
			       struct ieee80211_link_data *link,
			       const u8 *peer, u8 action_code, u8 dialog_token,
			       u16 status_code, struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_tdls_data *tf;

	tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u));

	memcpy(tf->da, peer, ETH_ALEN);
	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;

	/* network header is after the ethernet header */
	skb_set_network_header(skb, ETH_HLEN);

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_REQUEST;

		skb_put(skb, sizeof(tf->u.setup_req));
		tf->u.setup_req.dialog_token = dialog_token;
		tf->u.setup_req.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	case WLAN_TDLS_SETUP_RESPONSE:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_RESPONSE;

		skb_put(skb, sizeof(tf->u.setup_resp));
		tf->u.setup_resp.status_code = cpu_to_le16(status_code);
		tf->u.setup_resp.dialog_token = dialog_token;
		tf->u.setup_resp.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	case WLAN_TDLS_SETUP_CONFIRM:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;

		skb_put(skb, sizeof(tf->u.setup_cfm));
		tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
		tf->u.setup_cfm.dialog_token = dialog_token;
		break;
	case WLAN_TDLS_TEARDOWN:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_TEARDOWN;

		skb_put(skb, sizeof(tf->u.teardown));
		tf->u.teardown.reason_code = cpu_to_le16(status_code);
		break;
	case WLAN_TDLS_DISCOVERY_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;

		skb_put(skb, sizeof(tf->u.discover_req));
		tf->u.discover_req.dialog_token = dialog_token;
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;

		skb_put(skb, sizeof(tf->u.chan_switch_req));
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		tf->category = WLAN_CATEGORY_TDLS;
		tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;

		skb_put(skb, sizeof(tf->u.chan_switch_resp));
		tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int
ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
			   const u8 *peer, struct ieee80211_link_data *link,
			   u8 action_code, u8 dialog_token,
			   u16 status_code, struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_mgmt *mgmt;

	mgmt = skb_put_zero(skb, 24);
	memcpy(mgmt->da, peer, ETH_ALEN);
	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
	memcpy(mgmt->bssid, link->u.mgd.bssid, ETH_ALEN);
	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
					  IEEE80211_STYPE_ACTION);

	switch (action_code) {
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp));
		mgmt->u.action.category = WLAN_CATEGORY_PUBLIC;
		mgmt->u.action.u.tdls_discover_resp.action_code =
			WLAN_PUB_ACTION_TDLS_DISCOVER_RES;
		mgmt->u.action.u.tdls_discover_resp.dialog_token =
			dialog_token;
		mgmt->u.action.u.tdls_discover_resp.capability =
			cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
								 status_code));
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static struct sk_buff *
ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
				      const u8 *peer, int link_id,
				      u8 action_code, u8 dialog_token,
				      u16 status_code, bool initiator,
				      const u8 *extra_ies, size_t extra_ies_len,
				      u8 oper_class,
				      struct cfg80211_chan_def *chandef)
{
	struct ieee80211_local *local = sdata->local;
	struct sk_buff *skb;
	int ret;
	struct ieee80211_link_data *link;

	link_id = link_id >= 0 ? link_id : 0;
	rcu_read_lock();
	link = rcu_dereference(sdata->link[link_id]);
	if (WARN_ON(!link))
		goto unlock;

	skb = netdev_alloc_skb(sdata->dev,
			       local->hw.extra_tx_headroom +
			       max(sizeof(struct ieee80211_mgmt),
				   sizeof(struct ieee80211_tdls_data)) +
			       50 + /* supported rates */
			       10 + /* ext capab */
			       26 + /* max(WMM-info, WMM-param) */
			       2 + max(sizeof(struct ieee80211_ht_cap),
				       sizeof(struct ieee80211_ht_operation)) +
			       2 + max(sizeof(struct ieee80211_vht_cap),
				       sizeof(struct ieee80211_vht_operation)) +
			       2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
				       sizeof(struct ieee80211_he_mcs_nss_supp) +
				       IEEE80211_HE_PPE_THRES_MAX_LEN +
			       2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
			       2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
				       sizeof(struct ieee80211_eht_mcs_nss_supp) +
				       IEEE80211_EHT_PPE_THRES_MAX_LEN +
			       50 + /* supported channels */
			       3 + /* 40/20 BSS coex */
			       4 + /* AID */
			       4 + /* oper classes */
			       extra_ies_len +
			       sizeof(struct ieee80211_tdls_lnkie));
	if (!skb)
		goto unlock;

	skb_reserve(skb, local->hw.extra_tx_headroom);

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_DISCOVERY_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
						     sdata->dev, link, peer,
						     action_code, dialog_token,
						     status_code, skb);
		break;
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
						 peer, link, action_code,
						 dialog_token, status_code,
						 skb);
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	if (ret < 0)
		goto fail;

	ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
			       initiator, extra_ies, extra_ies_len, oper_class,
			       chandef);
	rcu_read_unlock();
	return skb;

fail:
	dev_kfree_skb(skb);
unlock:
	rcu_read_unlock();
	return NULL;
}

static int
ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
				const u8 *peer, int link_id,
				u8 action_code, u8 dialog_token,
				u16 status_code, u32 peer_capability,
				bool initiator, const u8 *extra_ies,
				size_t extra_ies_len, u8 oper_class,
				struct cfg80211_chan_def *chandef)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct sk_buff *skb = NULL;
	struct sta_info *sta;
	u32 flags = 0;
	int ret = 0;

	rcu_read_lock();
	sta = sta_info_get(sdata, peer);

	/* infer the initiator if we can, to support old userspace */
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
		if (sta) {
			set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
			sta->sta.tdls_initiator = false;
		}
		fallthrough;
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_TDLS_DISCOVERY_REQUEST:
		initiator = true;
		break;
	case WLAN_TDLS_SETUP_RESPONSE:
		/*
		 * In some testing scenarios, we send a request and response.
		 * Make the last packet sent take effect for the initiator
		 * value.
		 */
		if (sta) {
			clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
			sta->sta.tdls_initiator = true;
		}
		fallthrough;
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		initiator = false;
		break;
	case WLAN_TDLS_TEARDOWN:
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		/* any value is ok */
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
		initiator = true;

	rcu_read_unlock();
	if (ret < 0)
		goto fail;

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
						    link_id, action_code,
						    dialog_token, status_code,
						    initiator, extra_ies,
						    extra_ies_len, oper_class,
						    chandef);
	if (!skb) {
		ret = -EINVAL;
		goto fail;
	}

	if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
		ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
		return 0;
	}

	/*
	 * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
	 * we should default to AC_VI.
	 */
	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
		skb->priority = 256 + 2;
		break;
	default:
		skb->priority = 256 + 5;
		break;
	}

	/*
	 * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress.
	 * Later, if no ACK is returned from peer, we will re-send the teardown
	 * packet through the AP.
	 */
	if ((action_code == WLAN_TDLS_TEARDOWN) &&
	    ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
		bool try_resend; /* Should we keep skb for possible resend */

		/* If not sending directly to peer - no point in keeping skb */
		rcu_read_lock();
		sta = sta_info_get(sdata, peer);
		try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
		rcu_read_unlock();

		spin_lock_bh(&sdata->u.mgd.teardown_lock);
		if (try_resend && !sdata->u.mgd.teardown_skb) {
			/* Mark it as requiring TX status callback  */
			flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
				 IEEE80211_TX_INTFL_MLME_CONN_TX;

			/*
			 * skb is copied since mac80211 will later set
			 * properties that might not be the same as the AP,
			 * such as encryption, QoS, addresses, etc.
			 *
			 * No problem if skb_copy() fails, so no need to check.
			 */
			sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC);
			sdata->u.mgd.orig_teardown_skb = skb;
		}
		spin_unlock_bh(&sdata->u.mgd.teardown_lock);
	}

	/* disable bottom halves when entering the Tx path */
	local_bh_disable();
	__ieee80211_subif_start_xmit(skb, dev, flags,
				     IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
	local_bh_enable();

	return ret;

fail:
	dev_kfree_skb(skb);
	return ret;
}

static int
ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
			  const u8 *peer, int link_id,
			  u8 action_code, u8 dialog_token,
			  u16 status_code, u32 peer_capability, bool initiator,
			  const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	enum ieee80211_smps_mode smps_mode =
		sdata->deflink.u.mgd.driver_smps_mode;
	int ret;

	/* don't support setup with forced SMPS mode that's not off */
	if (smps_mode != IEEE80211_SMPS_AUTOMATIC &&
	    smps_mode != IEEE80211_SMPS_OFF) {
		tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n",
			 smps_mode);
		return -EOPNOTSUPP;
	}

	lockdep_assert_wiphy(local->hw.wiphy);

	/* we don't support concurrent TDLS peer setups */
	if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) &&
	    !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
		ret = -EBUSY;
		goto out_unlock;
	}

	/*
	 * make sure we have a STA representing the peer so we drop or buffer
	 * non-TDLS-setup frames to the peer. We can't send other packets
	 * during setup through the AP path.
	 * Allow error packets to be sent - sometimes we don't even add a STA
	 * before failing the setup.
	 */
	if (status_code == 0) {
		rcu_read_lock();
		if (!sta_info_get(sdata, peer)) {
			rcu_read_unlock();
			ret = -ENOLINK;
			goto out_unlock;
		}
		rcu_read_unlock();
	}

	ieee80211_flush_queues(local, sdata, false);
	memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN);

	/* we cannot take the mutex while preparing the setup packet */
	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
					      link_id, action_code,
					      dialog_token, status_code,
					      peer_capability, initiator,
					      extra_ies, extra_ies_len, 0,
					      NULL);
	if (ret < 0) {
		eth_zero_addr(sdata->u.mgd.tdls_peer);
		return ret;
	}

	wiphy_delayed_work_queue(sdata->local->hw.wiphy,
				 &sdata->u.mgd.tdls_peer_del_work,
				 TDLS_PEER_SETUP_TIMEOUT);
	return 0;

out_unlock:
	return ret;
}

static int
ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
			     const u8 *peer, int link_id,
			     u8 action_code, u8 dialog_token,
			     u16 status_code, u32 peer_capability,
			     bool initiator, const u8 *extra_ies,
			     size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;
	int ret;

	/*
	 * No packets can be transmitted to the peer via the AP during setup -
	 * the STA is set as a TDLS peer, but is not authorized.
	 * During teardown, we prevent direct transmissions by stopping the
	 * queues and flushing all direct packets.
	 */
	ieee80211_stop_vif_queues(local, sdata,
				  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);
	ieee80211_flush_queues(local, sdata, false);

	ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
					      link_id, action_code,
					      dialog_token, status_code,
					      peer_capability, initiator,
					      extra_ies, extra_ies_len, 0,
					      NULL);
	if (ret < 0)
		sdata_err(sdata, "Failed sending TDLS teardown packet %d\n",
			  ret);

	/*
	 * Remove the STA AUTH flag to force further traffic through the AP. If
	 * the STA was unreachable, it was already removed.
	 */
	rcu_read_lock();
	sta = sta_info_get(sdata, peer);
	if (sta)
		clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
	rcu_read_unlock();

	ieee80211_wake_vif_queues(local, sdata,
				  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);

	return 0;
}

int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
			const u8 *peer, int link_id,
			u8 action_code, u8 dialog_token, u16 status_code,
			u32 peer_capability, bool initiator,
			const u8 *extra_ies, size_t extra_ies_len)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	int ret;

	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
		return -EOPNOTSUPP;

	/* make sure we are in managed mode, and associated */
	if (sdata->vif.type != NL80211_IFTYPE_STATION ||
	    !sdata->u.mgd.associated)
		return -EINVAL;

	switch (action_code) {
	case WLAN_TDLS_SETUP_REQUEST:
	case WLAN_TDLS_SETUP_RESPONSE:
		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
						link_id, action_code,
						dialog_token, status_code,
						peer_capability, initiator,
						extra_ies, extra_ies_len);
		break;
	case WLAN_TDLS_TEARDOWN:
		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
						   action_code, dialog_token,
						   status_code,
						   peer_capability, initiator,
						   extra_ies, extra_ies_len);
		break;
	case WLAN_TDLS_DISCOVERY_REQUEST:
		/*
		 * Protect the discovery so we can hear the TDLS discovery
		 * response frame. It is transmitted directly and not buffered
		 * by the AP.
		 */
		drv_mgd_protect_tdls_discover(sdata->local, sdata, link_id);
		fallthrough;
	case WLAN_TDLS_SETUP_CONFIRM:
	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
		/* no special handling */
		ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
						      link_id, action_code,
						      dialog_token,
						      status_code,
						      peer_capability,
						      initiator, extra_ies,
						      extra_ies_len, 0, NULL);
		break;
	default:
		ret = -EOPNOTSUPP;
		break;
	}

	tdls_dbg(sdata, "TDLS mgmt action %d peer %pM link_id %d status %d\n",
		 action_code, peer, link_id, ret);
	return ret;
}

static void iee80211_tdls_recalc_chanctx(struct ieee80211_sub_if_data *sdata,
					 struct sta_info *sta)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_chanctx_conf *conf;
	struct ieee80211_chanctx *ctx;
	enum nl80211_chan_width width;
	struct ieee80211_supported_band *sband;

	lockdep_assert_wiphy(local->hw.wiphy);

	conf = rcu_dereference_protected(sdata->vif.bss_conf.chanctx_conf,
					 lockdep_is_held(&local->hw.wiphy->mtx));
	if (conf) {
		width = conf->def.width;
		sband = local->hw.wiphy->bands[conf->def.chan->band];
		ctx = container_of(conf, struct ieee80211_chanctx, conf);
		ieee80211_recalc_chanctx_chantype(local, ctx);

		/* if width changed and a peer is given, update its BW */
		if (width != conf->def.width && sta &&
		    test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) {
			enum ieee80211_sta_rx_bandwidth bw;

			bw = ieee80211_chan_width_to_rx_bw(conf->def.width);
			bw = min(bw, ieee80211_sta_cap_rx_bw(&sta->deflink));
			if (bw != sta->sta.deflink.bandwidth) {
				sta->sta.deflink.bandwidth = bw;
				rate_control_rate_update(local, sband,
							 &sta->deflink,
							 IEEE80211_RC_BW_CHANGED);
				/*
				 * if a TDLS peer BW was updated, we need to
				 * recalc the chandef width again, to get the
				 * correct chanctx min_def
				 */
				ieee80211_recalc_chanctx_chantype(local, ctx);
			}
		}

	}
}

static int iee80211_tdls_have_ht_peers(struct ieee80211_sub_if_data *sdata)
{
	struct sta_info *sta;
	bool result = false;

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
		if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
		    !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
		    !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH) ||
		    !sta->sta.deflink.ht_cap.ht_supported)
			continue;
		result = true;
		break;
	}
	rcu_read_unlock();

	return result;
}

static void
iee80211_tdls_recalc_ht_protection(struct ieee80211_sub_if_data *sdata,
				   struct sta_info *sta)
{
	bool tdls_ht;
	u16 protection = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
			 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
			 IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
	u16 opmode;

	/* Nothing to do if the BSS connection uses (at least) HT */
	if (sdata->deflink.u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT)
		return;

	tdls_ht = (sta && sta->sta.deflink.ht_cap.ht_supported) ||
		  iee80211_tdls_have_ht_peers(sdata);

	opmode = sdata->vif.bss_conf.ht_operation_mode;

	if (tdls_ht)
		opmode |= protection;
	else
		opmode &= ~protection;

	if (opmode == sdata->vif.bss_conf.ht_operation_mode)
		return;

	sdata->vif.bss_conf.ht_operation_mode = opmode;
	ieee80211_link_info_change_notify(sdata, &sdata->deflink,
					  BSS_CHANGED_HT);
}

int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
			const u8 *peer, enum nl80211_tdls_operation oper)
{
	struct sta_info *sta;
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
		return -EOPNOTSUPP;

	if (sdata->vif.type != NL80211_IFTYPE_STATION || !sdata->vif.cfg.assoc)
		return -EINVAL;

	switch (oper) {
	case NL80211_TDLS_ENABLE_LINK:
	case NL80211_TDLS_DISABLE_LINK:
		break;
	case NL80211_TDLS_TEARDOWN:
	case NL80211_TDLS_SETUP:
	case NL80211_TDLS_DISCOVERY_REQ:
		/* We don't support in-driver setup/teardown/discovery */
		return -EOPNOTSUPP;
	}

	/* protect possible bss_conf changes and avoid concurrency in
	 * ieee80211_bss_info_change_notify()
	 */
	tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer);

	switch (oper) {
	case NL80211_TDLS_ENABLE_LINK:
		if (sdata->vif.bss_conf.csa_active) {
			tdls_dbg(sdata, "TDLS: disallow link during CSA\n");
			return -EBUSY;
		}

		sta = sta_info_get(sdata, peer);
		if (!sta || !sta->sta.tdls)
			return -ENOLINK;

		iee80211_tdls_recalc_chanctx(sdata, sta);
		iee80211_tdls_recalc_ht_protection(sdata, sta);

		set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);

		WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) ||
			     !ether_addr_equal(sdata->u.mgd.tdls_peer, peer));
		break;
	case NL80211_TDLS_DISABLE_LINK:
		/*
		 * The teardown message in ieee80211_tdls_mgmt_teardown() was
		 * created while the queues were stopped, so it might still be
		 * pending. Before flushing the queues we need to be sure the
		 * message is handled by the tasklet handling pending messages,
		 * otherwise we might start destroying the station before
		 * sending the teardown packet.
		 * Note that this only forces the tasklet to flush pendings -
		 * not to stop the tasklet from rescheduling itself.
		 */
		tasklet_kill(&local->tx_pending_tasklet);
		/* flush a potentially queued teardown packet */
		ieee80211_flush_queues(local, sdata, false);

		ret = sta_info_destroy_addr(sdata, peer);

		iee80211_tdls_recalc_ht_protection(sdata, NULL);

		iee80211_tdls_recalc_chanctx(sdata, NULL);
		if (ret)
			return ret;
		break;
	default:
		return -EOPNOTSUPP;
	}

	if (ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
		wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
					  &sdata->u.mgd.tdls_peer_del_work);
		eth_zero_addr(sdata->u.mgd.tdls_peer);
	}

	wiphy_work_queue(sdata->local->hw.wiphy,
			 &sdata->deflink.u.mgd.request_smps_work);

	return 0;
}

void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer,
				 enum nl80211_tdls_operation oper,
				 u16 reason_code, gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	if (vif->type != NL80211_IFTYPE_STATION || !vif->cfg.assoc) {
		sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n",
			  oper);
		return;
	}

	cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp);
}
EXPORT_SYMBOL(ieee80211_tdls_oper_request);

static void
iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout)
{
	struct ieee80211_ch_switch_timing *ch_sw;

	*buf++ = WLAN_EID_CHAN_SWITCH_TIMING;
	*buf++ = sizeof(struct ieee80211_ch_switch_timing);

	ch_sw = (void *)buf;
	ch_sw->switch_time = cpu_to_le16(switch_time);
	ch_sw->switch_timeout = cpu_to_le16(switch_timeout);
}

/* find switch timing IE in SKB ready for Tx */
static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb)
{
	struct ieee80211_tdls_data *tf;
	const u8 *ie_start;

	/*
	 * Get the offset for the new location of the switch timing IE.
	 * The SKB network header will now point to the "payload_type"
	 * element of the TDLS data frame struct.
	 */
	tf = container_of(skb->data + skb_network_offset(skb),
			  struct ieee80211_tdls_data, payload_type);
	ie_start = tf->u.chan_switch_req.variable;
	return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start,
				skb->len - (ie_start - skb->data));
}

static struct sk_buff *
ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class,
			      struct cfg80211_chan_def *chandef,
			      u32 *ch_sw_tm_ie_offset)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) +
		     2 + sizeof(struct ieee80211_ch_switch_timing)];
	int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing);
	u8 *pos = extra_ies;
	struct sk_buff *skb;
	int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;

	/*
	 * if chandef points to a wide channel add a Secondary-Channel
	 * Offset information element
	 */
	if (chandef->width == NL80211_CHAN_WIDTH_40) {
		struct ieee80211_sec_chan_offs_ie *sec_chan_ie;
		bool ht40plus;

		*pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET;
		*pos++ = sizeof(*sec_chan_ie);
		sec_chan_ie = (void *)pos;

		ht40plus = cfg80211_get_chandef_type(chandef) ==
							NL80211_CHAN_HT40PLUS;
		sec_chan_ie->sec_chan_offs = ht40plus ?
					     IEEE80211_HT_PARAM_CHA_SEC_ABOVE :
					     IEEE80211_HT_PARAM_CHA_SEC_BELOW;
		pos += sizeof(*sec_chan_ie);

		extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie);
	}

	/* just set the values to 0, this is a template */
	iee80211_tdls_add_ch_switch_timing(pos, 0, 0);

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
					      link_id,
					      WLAN_TDLS_CHANNEL_SWITCH_REQUEST,
					      0, 0, !sta->sta.tdls_initiator,
					      extra_ies, extra_ies_len,
					      oper_class, chandef);
	if (!skb)
		return NULL;

	skb = ieee80211_build_data_template(sdata, skb, 0);
	if (IS_ERR(skb)) {
		tdls_dbg(sdata, "Failed building TDLS channel switch frame\n");
		return NULL;
	}

	if (ch_sw_tm_ie_offset) {
		const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);

		if (!tm_ie) {
			tdls_dbg(sdata, "No switch timing IE in TDLS switch\n");
			dev_kfree_skb_any(skb);
			return NULL;
		}

		*ch_sw_tm_ie_offset = tm_ie - skb->data;
	}

	tdls_dbg(sdata,
		 "TDLS channel switch request template for %pM ch %d width %d\n",
		 sta->sta.addr, chandef->chan->center_freq, chandef->width);
	return skb;
}

int
ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
			      const u8 *addr, u8 oper_class,
			      struct cfg80211_chan_def *chandef)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;
	struct sk_buff *skb = NULL;
	u32 ch_sw_tm_ie;
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	if (chandef->chan->freq_offset)
		/* this may work, but is untested */
		return -EOPNOTSUPP;

	sta = sta_info_get(sdata, addr);
	if (!sta) {
		tdls_dbg(sdata,
			 "Invalid TDLS peer %pM for channel switch request\n",
			 addr);
		ret = -ENOENT;
		goto out;
	}

	if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) {
		tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n",
			 addr);
		ret = -EOPNOTSUPP;
		goto out;
	}

	skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef,
					    &ch_sw_tm_ie);
	if (!skb) {
		ret = -ENOENT;
		goto out;
	}

	ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class,
				      chandef, skb, ch_sw_tm_ie);
	if (!ret)
		set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);

out:
	dev_kfree_skb_any(skb);
	return ret;
}

void
ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
				     struct net_device *dev,
				     const u8 *addr)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
	struct ieee80211_local *local = sdata->local;
	struct sta_info *sta;

	lockdep_assert_wiphy(local->hw.wiphy);

	sta = sta_info_get(sdata, addr);
	if (!sta) {
		tdls_dbg(sdata,
			 "Invalid TDLS peer %pM for channel switch cancel\n",
			 addr);
		return;
	}

	if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) {
		tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n",
			 addr);
		return;
	}

	drv_tdls_cancel_channel_switch(local, sdata, &sta->sta);
	clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL);
}

static struct sk_buff *
ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta,
				   u32 *ch_sw_tm_ie_offset)
{
	struct ieee80211_sub_if_data *sdata = sta->sdata;
	struct sk_buff *skb;
	u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)];
	int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;

	/* initial timing are always zero in the template */
	iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0);

	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
					link_id,
					WLAN_TDLS_CHANNEL_SWITCH_RESPONSE,
					0, 0, !sta->sta.tdls_initiator,
					extra_ies, sizeof(extra_ies), 0, NULL);
	if (!skb)
		return NULL;

	skb = ieee80211_build_data_template(sdata, skb, 0);
	if (IS_ERR(skb)) {
		tdls_dbg(sdata,
			 "Failed building TDLS channel switch resp frame\n");
		return NULL;
	}

	if (ch_sw_tm_ie_offset) {
		const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);

		if (!tm_ie) {
			tdls_dbg(sdata,
				 "No switch timing IE in TDLS switch resp\n");
			dev_kfree_skb_any(skb);
			return NULL;
		}

		*ch_sw_tm_ie_offset = tm_ie - skb->data;
	}

	tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n",
		 sta->sta.addr);
	return skb;
}

static int
ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata,
					   struct sk_buff *skb)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee802_11_elems *elems = NULL;
	struct sta_info *sta;
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	bool local_initiator;
	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
	int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable);
	struct ieee80211_tdls_ch_sw_params params = {};
	int ret;

	lockdep_assert_wiphy(local->hw.wiphy);

	params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
	params.timestamp = rx_status->device_timestamp;

	if (skb->len < baselen) {
		tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n",
			 skb->len);
		return -EINVAL;
	}

	sta = sta_info_get(sdata, tf->sa);
	if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
		tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
			 tf->sa);
		ret = -EINVAL;
		goto out;
	}

	params.sta = &sta->sta;
	params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code);
	if (params.status != 0) {
		ret = 0;
		goto call_drv;
	}

	elems = ieee802_11_parse_elems(tf->u.chan_switch_resp.variable,
				       skb->len - baselen,
				       IEEE80211_FTYPE_MGMT |
				       IEEE80211_STYPE_ACTION,
				       NULL);
	if (!elems) {
		ret = -ENOMEM;
		goto out;
	}

	if (elems->parse_error) {
		tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n");
		ret = -EINVAL;
		goto out;
	}

	if (!elems->ch_sw_timing || !elems->lnk_id) {
		tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n");
		ret = -EINVAL;
		goto out;
	}

	/* validate the initiator is set correctly */
	local_initiator =
		!memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
	if (local_initiator == sta->sta.tdls_initiator) {
		tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
		ret = -EINVAL;
		goto out;
	}

	params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time);
	params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout);

	params.tmpl_skb =
		ieee80211_tdls_ch_sw_resp_tmpl_get(sta, &params.ch_sw_tm_ie);
	if (!params.tmpl_skb) {
		ret = -ENOENT;
		goto out;
	}

	ret = 0;
call_drv:
	drv_tdls_recv_channel_switch(sdata->local, sdata, &params);

	tdls_dbg(sdata,
		 "TDLS channel switch response received from %pM status %d\n",
		 tf->sa, params.status);

out:
	dev_kfree_skb_any(params.tmpl_skb);
	kfree(elems);
	return ret;
}

static int
ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
					  struct sk_buff *skb)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee802_11_elems *elems;
	struct cfg80211_chan_def chandef;
	struct ieee80211_channel *chan;
	enum nl80211_channel_type chan_type;
	int freq;
	u8 target_channel, oper_class;
	bool local_initiator;
	struct sta_info *sta;
	enum nl80211_band band;
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
	int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable);
	struct ieee80211_tdls_ch_sw_params params = {};
	int ret = 0;

	lockdep_assert_wiphy(local->hw.wiphy);

	params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
	params.timestamp = rx_status->device_timestamp;

	if (skb->len < baselen) {
		tdls_dbg(sdata, "TDLS channel switch req too short: %d\n",
			 skb->len);
		return -EINVAL;
	}

	target_channel = tf->u.chan_switch_req.target_channel;
	oper_class = tf->u.chan_switch_req.oper_class;

	/*
	 * We can't easily infer the channel band. The operating class is
	 * ambiguous - there are multiple tables (US/Europe/JP/Global). The
	 * solution here is to treat channels with number >14 as 5GHz ones,
	 * and specifically check for the (oper_class, channel) combinations
	 * where this doesn't hold. These are thankfully unique according to
	 * IEEE802.11-2012.
	 * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as
	 * valid here.
	 */
	if ((oper_class == 112 || oper_class == 2 || oper_class == 3 ||
	     oper_class == 4 || oper_class == 5 || oper_class == 6) &&
	     target_channel < 14)
		band = NL80211_BAND_5GHZ;
	else
		band = target_channel < 14 ? NL80211_BAND_2GHZ :
					     NL80211_BAND_5GHZ;

	freq = ieee80211_channel_to_frequency(target_channel, band);
	if (freq == 0) {
		tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n",
			 target_channel);
		return -EINVAL;
	}

	chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
	if (!chan) {
		tdls_dbg(sdata,
			 "Unsupported channel for TDLS chan switch: %d\n",
			 target_channel);
		return -EINVAL;
	}

	elems = ieee802_11_parse_elems(tf->u.chan_switch_req.variable,
				       skb->len - baselen,
				       IEEE80211_FTYPE_MGMT |
				       IEEE80211_STYPE_ACTION,
				       NULL);
	if (!elems)
		return -ENOMEM;

	if (elems->parse_error) {
		tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n");
		ret = -EINVAL;
		goto free;
	}

	if (!elems->ch_sw_timing || !elems->lnk_id) {
		tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n");
		ret = -EINVAL;
		goto free;
	}

	if (!elems->sec_chan_offs) {
		chan_type = NL80211_CHAN_HT20;
	} else {
		switch (elems->sec_chan_offs->sec_chan_offs) {
		case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
			chan_type = NL80211_CHAN_HT40PLUS;
			break;
		case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
			chan_type = NL80211_CHAN_HT40MINUS;
			break;
		default:
			chan_type = NL80211_CHAN_HT20;
			break;
		}
	}

	cfg80211_chandef_create(&chandef, chan, chan_type);

	/* we will be active on the TDLS link */
	if (!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &chandef,
					   sdata->wdev.iftype)) {
		tdls_dbg(sdata, "TDLS chan switch to forbidden channel\n");
		ret = -EINVAL;
		goto free;
	}

	sta = sta_info_get(sdata, tf->sa);
	if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
		tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
			 tf->sa);
		ret = -EINVAL;
		goto out;
	}

	params.sta = &sta->sta;

	/* validate the initiator is set correctly */
	local_initiator =
		!memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
	if (local_initiator == sta->sta.tdls_initiator) {
		tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
		ret = -EINVAL;
		goto out;
	}

	/* peer should have known better */
	if (!sta->sta.deflink.ht_cap.ht_supported && elems->sec_chan_offs &&
	    elems->sec_chan_offs->sec_chan_offs) {
		tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n");
		ret = -EOPNOTSUPP;
		goto out;
	}

	params.chandef = &chandef;
	params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time);
	params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout);

	params.tmpl_skb =
		ieee80211_tdls_ch_sw_resp_tmpl_get(sta,
						   &params.ch_sw_tm_ie);
	if (!params.tmpl_skb) {
		ret = -ENOENT;
		goto out;
	}

	drv_tdls_recv_channel_switch(sdata->local, sdata, &params);

	tdls_dbg(sdata,
		 "TDLS ch switch request received from %pM ch %d width %d\n",
		 tf->sa, params.chandef->chan->center_freq,
		 params.chandef->width);
out:
	dev_kfree_skb_any(params.tmpl_skb);
free:
	kfree(elems);
	return ret;
}

void
ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
				      struct sk_buff *skb)
{
	struct ieee80211_tdls_data *tf = (void *)skb->data;
	struct wiphy *wiphy = sdata->local->hw.wiphy;

	lockdep_assert_wiphy(wiphy);

	/* make sure the driver supports it */
	if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
		return;

	/* we want to access the entire packet */
	if (skb_linearize(skb))
		return;
	/*
	 * The packet/size was already validated by mac80211 Rx path, only look
	 * at the action type.
	 */
	switch (tf->action_code) {
	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
		ieee80211_process_tdls_channel_switch_req(sdata, skb);
		break;
	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
		ieee80211_process_tdls_channel_switch_resp(sdata, skb);
		break;
	default:
		WARN_ON_ONCE(1);
		return;
	}
}

void ieee80211_teardown_tdls_peers(struct ieee80211_link_data *link)
{
	struct ieee80211_sub_if_data *sdata = link->sdata;
	struct sta_info *sta;
	u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED;

	rcu_read_lock();
	list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
		if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded ||
		    !test_sta_flag(sta, WLAN_STA_AUTHORIZED))
			continue;

		if (sta->deflink.link_id != link->link_id)
			continue;

		ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr,
					    NL80211_TDLS_TEARDOWN, reason,
					    GFP_ATOMIC);
	}
	rcu_read_unlock();
}

void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata,
				      const u8 *peer, u16 reason)
{
	struct ieee80211_sta *sta;

	rcu_read_lock();
	sta = ieee80211_find_sta(&sdata->vif, peer);
	if (!sta || !sta->tdls) {
		rcu_read_unlock();
		return;
	}
	rcu_read_unlock();

	tdls_dbg(sdata, "disconnected from TDLS peer %pM (Reason: %u=%s)\n",
		 peer, reason,
		 ieee80211_get_reason_code_string(reason));

	ieee80211_tdls_oper_request(&sdata->vif, peer,
				    NL80211_TDLS_TEARDOWN,
				    WLAN_REASON_TDLS_TEARDOWN_UNREACHABLE,
				    GFP_ATOMIC);
}
]

gemini-3-flash-preview

							input: 113886
							output: 30
							thoughts: 3970
						

**Vulnerability Analysis of TDLS Channel Switch Processing**

Okay, so I've been digging into this `ieee80211_process_tdls_channel_switch` function. It seems like a potential Use-After-Free (UAF) is the most probable cause of the warning. Here's the deal: the function gets a TDLS frame, assigns a pointer `tf` to the start of the frame data, and then potentially calls `skb_linearize`. The problem is that if `skb_linearize` does reallocate the SKB's buffer, `tf` becomes stale, as it still points to the old, now freed, memory. Later, the code reads `tf->action_code` in a `switch` statement, and this now reads from potentially freed memory. This could result in a value other than the expected `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE`, causing the `WARN_ON_ONCE(1)` to trigger via the `default` case.

The interesting part is how an attacker can trigger this. They could send a specially crafted TDLS channel switch frame, either by making it large enough for fragmentation or by exploiting a driver that uses paged RX buffers that are always non-linear. The check in `rx.c` for channel switch frames ensures all of the initial header values are correct (including `action_code`), so an attacker can't just send random frames with the `ETH_P_TDLS` protocol. It is queued correctly by `__ieee80211_queue_skb_to_iface`. So, the only way to get this warning is through this process. If the SKB is non-linear, the UAF becomes a likely scenario.

The `pskb_may_pull` check should prevent an underflow from the access to the action code. Also, since there is a check in `rx.c`, it does seem highly unlikely the action code gets corrupted between the initial check and the worker processing. It's the `skb_linearize` that seems to be the culprit.

If this UAF happens, there is a chance the memory region is unchanged, but if not it leads to the warning. With KASAN it should crash. It's deterministic if the frame is large, so there's not a race condition.

I've also checked other TDLS code for related bugs, and I didn't see any obvious flaws. It's a bit odd that this isn't caught by KASAN.

map[Expression:ieee80211_process_tdls_channel_switch]

map[Output:net/mac80211/ieee80211_i.h=2819=void
net/mac80211/ieee80211_i.h:2820:ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
net/mac80211/ieee80211_i.h-2821-				      struct sk_buff *skb);
--
net/mac80211/iface.c=1779=static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
--
net/mac80211/iface.c-1799-		if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
net/mac80211/iface.c:1800:			ieee80211_process_tdls_channel_switch(sdata, skb);
net/mac80211/iface.c-1801-		else
--
net/mac80211/tdls.c=1745=static int
net/mac80211/tdls.c:1746:ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata,
net/mac80211/tdls.c-1747-					   struct sk_buff *skb)
--
net/mac80211/tdls.c=1840=static int
net/mac80211/tdls.c:1841:ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata,
net/mac80211/tdls.c-1842-					  struct sk_buff *skb)
--
net/mac80211/tdls.c=2005=void
net/mac80211/tdls.c:2006:ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
net/mac80211/tdls.c-2007-				      struct sk_buff *skb)
--
net/mac80211/tdls.c-2026-	case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
net/mac80211/tdls.c:2027:		ieee80211_process_tdls_channel_switch_req(sdata, skb);
net/mac80211/tdls.c-2028-		break;
net/mac80211/tdls.c-2029-	case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
net/mac80211/tdls.c:2030:		ieee80211_process_tdls_channel_switch_resp(sdata, skb);
net/mac80211/tdls.c-2031-		break;
]

gemini-3-flash-preview

							input: 119280
							output: 54
							thoughts: 489
						

**Investigating a Potential TDLS Channel Switch Vulnerability**

Okay, so I was looking into something and immediately my attention was drawn to `iface.c:1800`. That's where `ieee80211_process_tdls_channel_switch` gets called, right? Specifically, it's called if `skb->protocol` is `ETH_P_TDLS`. My first thought was, is it possible this is being triggered incorrectly? Could a non-channel switch frame somehow have `ETH_P_TDLS` set?

So, I did a quick search for where `skb->protocol` is set to `ETH_P_TDLS`. Initially, it looked like only `rx.c:3311` was involved. But, then I remembered `eth_type_trans` also plays a role! It also sets `skb->protocol`. And, sure enough, `ieee80211_deliver_skb` calls `eth_type_trans`. Although, `ieee80211_deliver_skb` doesn't use the iface worker!

Hold on, there's `ieee80211_rx_reorder_ampdu` too. It calls `ieee80211_queue_skb_to_iface`. And, I realized `ieee80211_queue_skb_to_iface` *zeroes* `skb->protocol`. So that's probably not the culprit.

Then the thought hit me: Could the driver itself be setting `skb->protocol` before mac80211 even gets its hands on it? Some drivers *might* do that. Although mac80211 typically overwrites it, or ignores it until `eth_type_trans`.

Ah, found it! I spotted another spot where `ETH_P_TDLS` is checked in `net/mac80211/rx.c`. Specifically, `ieee80211_invoke_fast_rx` has this check: `if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||`. Now I need to dig into `ieee80211_invoke_fast_rx` and see what it's doing.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_invoke_fast_rx]

map[SourceCode:4925:	static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
4926:					     struct ieee80211_fast_rx *fast_rx)
4927:	{
4928:		struct sk_buff *skb = rx->skb;
4929:		struct ieee80211_hdr *hdr = (void *)skb->data;
4930:		struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
4931:		static ieee80211_rx_result res;
4932:		int orig_len = skb->len;
4933:		int hdrlen = ieee80211_hdrlen(hdr->frame_control);
4934:		int snap_offs = hdrlen;
4935:		struct {
4936:			u8 snap[sizeof(rfc1042_header)];
4937:			__be16 proto;
4938:		} *payload __aligned(2);
4939:		struct {
4940:			u8 da[ETH_ALEN];
4941:			u8 sa[ETH_ALEN];
4942:		} addrs __aligned(2);
4943:		struct ieee80211_sta_rx_stats *stats;
4944:	
4945:		/* for parallel-rx, we need to have DUP_VALIDATED, otherwise we write
4946:		 * to a common data structure; drivers can implement that per queue
4947:		 * but we don't have that information in mac80211
4948:		 */
4949:		if (!(status->flag & RX_FLAG_DUP_VALIDATED))
4950:			return false;
4951:	
4952:	#define FAST_RX_CRYPT_FLAGS	(RX_FLAG_PN_VALIDATED | RX_FLAG_DECRYPTED)
4953:	
4954:		/* If using encryption, we also need to have:
4955:		 *  - PN_VALIDATED: similar, but the implementation is tricky
4956:		 *  - DECRYPTED: necessary for PN_VALIDATED
4957:		 */
4958:		if (fast_rx->key &&
4959:		    (status->flag & FAST_RX_CRYPT_FLAGS) != FAST_RX_CRYPT_FLAGS)
4960:			return false;
4961:	
4962:		if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
4963:			return false;
4964:	
4965:		if (unlikely(ieee80211_is_frag(hdr)))
4966:			return false;
4967:	
4968:		/* Since our interface address cannot be multicast, this
4969:		 * implicitly also rejects multicast frames without the
4970:		 * explicit check.
4971:		 *
4972:		 * We shouldn't get any *data* frames not addressed to us
4973:		 * (AP mode will accept multicast *management* frames), but
4974:		 * punting here will make it go through the full checks in
4975:		 * ieee80211_accept_frame().
4976:		 */
4977:		if (!ether_addr_equal(fast_rx->vif_addr, hdr->addr1))
4978:			return false;
4979:	
4980:		if ((hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_FROMDS |
4981:						      IEEE80211_FCTL_TODS)) !=
4982:		    fast_rx->expected_ds_bits)
4983:			return false;
4984:	
4985:		/* assign the key to drop unencrypted frames (later)
4986:		 * and strip the IV/MIC if necessary
4987:		 */
4988:		if (fast_rx->key && !(status->flag & RX_FLAG_IV_STRIPPED)) {
4989:			/* GCMP header length is the same */
4990:			snap_offs += IEEE80211_CCMP_HDR_LEN;
4991:		}
4992:	
4993:		if (!ieee80211_vif_is_mesh(&rx->sdata->vif) &&
4994:		    !(status->rx_flags & IEEE80211_RX_AMSDU)) {
4995:			if (!pskb_may_pull(skb, snap_offs + sizeof(*payload)))
4996:				return false;
4997:	
4998:			payload = (void *)(skb->data + snap_offs);
4999:	
5000:			if (!ether_addr_equal(payload->snap, fast_rx->rfc1042_hdr))
5001:				return false;
5002:	
5003:			/* Don't handle these here since they require special code.
5004:			 * Accept AARP and IPX even though they should come with a
5005:			 * bridge-tunnel header - but if we get them this way then
5006:			 * there's little point in discarding them.
5007:			 */
5008:			if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||
5009:				     payload->proto == fast_rx->control_port_protocol))
5010:				return false;
5011:		}
5012:	
5013:		/* after this point, don't punt to the slowpath! */
5014:	
5015:		if (fast_rx->uses_rss)
5016:			stats = this_cpu_ptr(rx->link_sta->pcpu_rx_stats);
5017:		else
5018:			stats = &rx->link_sta->rx_stats;
5019:	
5020:		if (rx->key && !(status->flag & RX_FLAG_MIC_STRIPPED) &&
5021:		    pskb_trim(skb, skb->len - fast_rx->icv_len))
5022:			goto drop;
5023:	
5024:		if (rx->key && !ieee80211_has_protected(hdr->frame_control))
5025:			goto drop;
5026:	
5027:		if (status->rx_flags & IEEE80211_RX_AMSDU) {
5028:			if (__ieee80211_rx_h_amsdu(rx, snap_offs - hdrlen) !=
5029:			    RX_QUEUED)
5030:				goto drop;
5031:	
5032:			return true;
5033:		}
5034:	
5035:		/* do the header conversion - first grab the addresses */
5036:		ether_addr_copy(addrs.da, skb->data + fast_rx->da_offs);
5037:		ether_addr_copy(addrs.sa, skb->data + fast_rx->sa_offs);
5038:		if (ieee80211_vif_is_mesh(&rx->sdata->vif)) {
5039:		    skb_pull(skb, snap_offs - 2);
5040:		    put_unaligned_be16(skb->len - 2, skb->data);
5041:		} else {
5042:		    skb_postpull_rcsum(skb, skb->data + snap_offs,
5043:				       sizeof(rfc1042_header) + 2);
5044:	
5045:		    /* remove the SNAP but leave the ethertype */
5046:		    skb_pull(skb, snap_offs + sizeof(rfc1042_header));
5047:		}
5048:		/* push the addresses in front */
5049:		memcpy(skb_push(skb, sizeof(addrs)), &addrs, sizeof(addrs));
5050:	
5051:		res = ieee80211_rx_mesh_data(rx->sdata, rx->sta, rx->skb);
5052:		switch (res) {
5053:		case RX_QUEUED:
5054:			stats->last_rx = jiffies;
5055:			stats->last_rate = sta_stats_encode_rate(status);
5056:			return true;
5057:		case RX_CONTINUE:
5058:			break;
5059:		default:
5060:			goto drop;
5061:		}
5062:	
5063:		ieee80211_rx_8023(rx, fast_rx, orig_len);
5064:	
5065:		return true;
5066:	 drop:
5067:		dev_kfree_skb(skb);
5068:	
5069:		stats->dropped++;
5070:		return true;
5071:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 122865
							output: 56
							thoughts: 840
						

**TDLS Frames and the Iface Worker: A Deeper Dive**

Okay, so I was looking at how TDLS frames are handled, and initially, I noticed that `ieee80211_invoke_fast_rx` explicitly rejects `ETH_P_TDLS`. That immediately sends it down the slow path, which triggered a thought: is there *any* other route to the worker with `ETH_P_TDLS`?

My first instinct was to check if the `skb->protocol` was set to `ETH_P_TDLS` *before* the fast path rejection, assuming a channel switch frame wasn't involved. I recalled that I'd already identified `rx.c:3311` as the primary setter of this protocol field.

Then, eureka! I found something interesting in `ieee80211_rx_h_data`. There's a check at lines 3301-3310 that *conditionally* sets `skb->protocol` to `ETH_P_TDLS` if the frame matches a specific TDLS channel switch frame criteria. However, if this check fails (specifically, if it's *not* a channel switch request or response), the code falls through and calls `ieee80211_deliver_skb(rx)`.

In that function, the call to `eth_type_trans(skb, dev)` is crucial. If the ethertype *is* indeed `ETH_P_TDLS`, this function will set the `skb->protocol` accordingly. From there, `ieee80211_deliver_skb_to_local_stack` calls `netif_receive_skb`.

Now, the question is, does `netif_receive_skb` somehow loop back to the iface worker? No, that heads straight to the network stack.

Wait... I need to consider another possibility: A-MSDUs. If the frame is an A-MSDU, `ieee80211_rx_h_amsdu` is called. Each MSDU is then passed to `ieee80211_data_to_8023_exthdr`. After that? Does it call `ieee80211_rx_h_data`? Need to check `ieee80211_rx_h_amsdu` to be sure.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:__ieee80211_rx_h_amsdu]

map[SourceCode:3118:	static ieee80211_rx_result debug_noinline
3119:	__ieee80211_rx_h_amsdu(struct ieee80211_rx_data *rx, u8 data_offset)
3120:	{
3121:		struct net_device *dev = rx->sdata->dev;
3122:		struct sk_buff *skb = rx->skb;
3123:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
3124:		__le16 fc = hdr->frame_control;
3125:		struct sk_buff_head frame_list;
3126:		struct ethhdr ethhdr;
3127:		const u8 *check_da = ethhdr.h_dest, *check_sa = ethhdr.h_source;
3128:	
3129:		if (unlikely(ieee80211_has_a4(hdr->frame_control))) {
3130:			check_da = NULL;
3131:			check_sa = NULL;
3132:		} else switch (rx->sdata->vif.type) {
3133:			case NL80211_IFTYPE_AP:
3134:			case NL80211_IFTYPE_AP_VLAN:
3135:				check_da = NULL;
3136:				break;
3137:			case NL80211_IFTYPE_STATION:
3138:				if (!test_sta_flag(rx->sta, WLAN_STA_TDLS_PEER))
3139:					check_sa = NULL;
3140:				break;
3141:			case NL80211_IFTYPE_MESH_POINT:
3142:				check_sa = NULL;
3143:				check_da = NULL;
3144:				break;
3145:			default:
3146:				break;
3147:		}
3148:	
3149:		skb->dev = dev;
3150:		__skb_queue_head_init(&frame_list);
3151:	
3152:		if (ieee80211_data_to_8023_exthdr(skb, &ethhdr,
3153:						  rx->sdata->vif.addr,
3154:						  rx->sdata->vif.type,
3155:						  data_offset, true))
3156:			return RX_DROP_U_BAD_AMSDU;
3157:	
3158:		if (rx->sta->amsdu_mesh_control < 0) {
3159:			s8 valid = -1;
3160:			int i;
3161:	
3162:			for (i = 0; i <= 2; i++) {
3163:				if (!ieee80211_is_valid_amsdu(skb, i))
3164:					continue;
3165:	
3166:				if (valid >= 0) {
3167:					/* ambiguous */
3168:					valid = -1;
3169:					break;
3170:				}
3171:	
3172:				valid = i;
3173:			}
3174:	
3175:			rx->sta->amsdu_mesh_control = valid;
3176:		}
3177:	
3178:		ieee80211_amsdu_to_8023s(skb, &frame_list, dev->dev_addr,
3179:					 rx->sdata->vif.type,
3180:					 rx->local->hw.extra_tx_headroom,
3181:					 check_da, check_sa,
3182:					 rx->sta->amsdu_mesh_control);
3183:	
3184:		while (!skb_queue_empty(&frame_list)) {
3185:			rx->skb = __skb_dequeue(&frame_list);
3186:	
3187:			switch (ieee80211_rx_mesh_data(rx->sdata, rx->sta, rx->skb)) {
3188:			case RX_QUEUED:
3189:				break;
3190:			case RX_CONTINUE:
3191:				if (ieee80211_frame_allowed(rx, fc)) {
3192:					ieee80211_deliver_skb(rx);
3193:					break;
3194:				}
3195:				fallthrough;
3196:			default:
3197:				dev_kfree_skb(rx->skb);
3198:			}
3199:		}
3200:	
3201:		return RX_QUEUED;
3202:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 125663
							output: 54
							thoughts: 314
						

**Analyzing A-MSDU Frame Handling in IEEE 802.11**

Okay, let's break this down. In `__ieee80211_rx_h_amsdu`, it's clear that `ieee80211_deliver_skb(rx)` is called for *each* MSDU within an A-MSDU. The key here is that `ieee80211_rx_h_data` is *not* involved directly in processing these individual MSDUs. This means TDLS channel switch frames, when encapsulated within an A-MSDU, aren't getting the special handling afforded by the `ieee80211_rx_h_data` path. They are delivered straight to the local stack, which is what I initially thought.

But wait, even if they're delivered to the local stack, they still seem to be missing the iface worker, this is my concern. I need to figure out where they're being lost.

Aha! Back to `ieee80211_rx_h_data`. I missed something crucial. Look at lines 3293-3295. Specifically, `ieee80211_rx_mesh_data(rx->sdata, rx->sta, rx->skb)`. If `ieee80211_rx_mesh_data` returns `RX_QUEUED`, the function immediately returns. So, it's short circuiting the processing. What does `ieee80211_rx_mesh_data` actually do? It's handling mesh frames, and if it's a mesh frame, it *could* be queuing the frame to the iface worker. This is potentially where the frame is being routed.

Time to dig into `ieee80211_rx_mesh_data` and confirm this.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_mesh_data]

map[SourceCode:2934:	static ieee80211_rx_result
2935:	ieee80211_rx_mesh_data(struct ieee80211_sub_if_data *sdata, struct sta_info *sta,
2936:			       struct sk_buff *skb)
2937:	{
2938:	#ifdef CONFIG_MAC80211_MESH
2939:		struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2940:		struct ieee80211_local *local = sdata->local;
2941:		uint16_t fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_DATA;
2942:		struct ieee80211_hdr hdr = {
2943:			.frame_control = cpu_to_le16(fc)
2944:		};
2945:		struct ieee80211_hdr *fwd_hdr;
2946:		struct ieee80211s_hdr *mesh_hdr;
2947:		struct ieee80211_tx_info *info;
2948:		struct sk_buff *fwd_skb;
2949:		struct ethhdr *eth;
2950:		bool multicast;
2951:		int tailroom = 0;
2952:		int hdrlen, mesh_hdrlen;
2953:		u8 *qos;
2954:	
2955:		if (!ieee80211_vif_is_mesh(&sdata->vif))
2956:			return RX_CONTINUE;
2957:	
2958:		if (!pskb_may_pull(skb, sizeof(*eth) + 6))
2959:			return RX_DROP_U_RUNT_MESH_DATA;
2960:	
2961:		mesh_hdr = (struct ieee80211s_hdr *)(skb->data + sizeof(*eth));
2962:		mesh_hdrlen = ieee80211_get_mesh_hdrlen(mesh_hdr);
2963:	
2964:		if (!pskb_may_pull(skb, sizeof(*eth) + mesh_hdrlen))
2965:			return RX_DROP_U_RUNT_MESH_DATA;
2966:	
2967:		eth = (struct ethhdr *)skb->data;
2968:		multicast = is_multicast_ether_addr(eth->h_dest);
2969:	
2970:		mesh_hdr = (struct ieee80211s_hdr *)(eth + 1);
2971:		if (!mesh_hdr->ttl)
2972:			return RX_DROP_U_MESH_NO_TTL;
2973:	
2974:		/* frame is in RMC, don't forward */
2975:		if (is_multicast_ether_addr(eth->h_dest) &&
2976:		    mesh_rmc_check(sdata, eth->h_source, mesh_hdr))
2977:			return RX_DROP_U_MESH_RMC;
2978:	
2979:		/* forward packet */
2980:		if (sdata->crypto_tx_tailroom_needed_cnt)
2981:			tailroom = IEEE80211_ENCRYPT_TAILROOM;
2982:	
2983:		if (mesh_hdr->flags & MESH_FLAGS_AE) {
2984:			struct mesh_path *mppath;
2985:			char *proxied_addr;
2986:			bool update = false;
2987:	
2988:			if (multicast)
2989:				proxied_addr = mesh_hdr->eaddr1;
2990:			else if ((mesh_hdr->flags & MESH_FLAGS_AE) == MESH_FLAGS_AE_A5_A6)
2991:				/* has_a4 already checked in ieee80211_rx_mesh_check */
2992:				proxied_addr = mesh_hdr->eaddr2;
2993:			else
2994:				return RX_DROP_U_MESH_BAD_AE;
2995:	
2996:			rcu_read_lock();
2997:			mppath = mpp_path_lookup(sdata, proxied_addr);
2998:			if (!mppath) {
2999:				mpp_path_add(sdata, proxied_addr, eth->h_source);
3000:			} else {
3001:				spin_lock_bh(&mppath->state_lock);
3002:				if (!ether_addr_equal(mppath->mpp, eth->h_source)) {
3003:					memcpy(mppath->mpp, eth->h_source, ETH_ALEN);
3004:					update = true;
3005:				}
3006:				mppath->exp_time = jiffies;
3007:				spin_unlock_bh(&mppath->state_lock);
3008:			}
3009:	
3010:			/* flush fast xmit cache if the address path changed */
3011:			if (update)
3012:				mesh_fast_tx_flush_addr(sdata, proxied_addr);
3013:	
3014:			rcu_read_unlock();
3015:		}
3016:	
3017:		/* Frame has reached destination.  Don't forward */
3018:		if (ether_addr_equal(sdata->vif.addr, eth->h_dest))
3019:			goto rx_accept;
3020:	
3021:		if (!--mesh_hdr->ttl) {
3022:			if (multicast)
3023:				goto rx_accept;
3024:	
3025:			IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
3026:			return RX_DROP_U_MESH_TTL_EXPIRED;
3027:		}
3028:	
3029:		if (!ifmsh->mshcfg.dot11MeshForwarding) {
3030:			if (is_multicast_ether_addr(eth->h_dest))
3031:				goto rx_accept;
3032:	
3033:			return RX_DROP_U_MESH_NOT_FORWARDING;
3034:		}
3035:	
3036:		skb_set_queue_mapping(skb, ieee802_1d_to_ac[skb->priority]);
3037:	
3038:		if (!multicast &&
3039:		    ieee80211_rx_mesh_fast_forward(sdata, skb, mesh_hdrlen))
3040:			return RX_QUEUED;
3041:	
3042:		ieee80211_fill_mesh_addresses(&hdr, &hdr.frame_control,
3043:					      eth->h_dest, eth->h_source);
3044:		hdrlen = ieee80211_hdrlen(hdr.frame_control);
3045:		if (multicast) {
3046:			int extra_head = sizeof(struct ieee80211_hdr) - sizeof(*eth);
3047:	
3048:			fwd_skb = skb_copy_expand(skb, local->tx_headroom + extra_head +
3049:						       IEEE80211_ENCRYPT_HEADROOM,
3050:						  tailroom, GFP_ATOMIC);
3051:			if (!fwd_skb)
3052:				goto rx_accept;
3053:		} else {
3054:			fwd_skb = skb;
3055:			skb = NULL;
3056:	
3057:			if (skb_cow_head(fwd_skb, hdrlen - sizeof(struct ethhdr)))
3058:				return RX_DROP_U_OOM;
3059:	
3060:			if (skb_linearize(fwd_skb))
3061:				return RX_DROP_U_OOM;
3062:		}
3063:	
3064:		fwd_hdr = skb_push(fwd_skb, hdrlen - sizeof(struct ethhdr));
3065:		memcpy(fwd_hdr, &hdr, hdrlen - 2);
3066:		qos = ieee80211_get_qos_ctl(fwd_hdr);
3067:		qos[0] = qos[1] = 0;
3068:	
3069:		skb_reset_mac_header(fwd_skb);
3070:		hdrlen += mesh_hdrlen;
3071:		if (ieee80211_get_8023_tunnel_proto(fwd_skb->data + hdrlen,
3072:						    &fwd_skb->protocol))
3073:			hdrlen += ETH_ALEN;
3074:		else
3075:			fwd_skb->protocol = htons(fwd_skb->len - hdrlen);
3076:		skb_set_network_header(fwd_skb, hdrlen + 2);
3077:	
3078:		info = IEEE80211_SKB_CB(fwd_skb);
3079:		memset(info, 0, sizeof(*info));
3080:		info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
3081:		info->control.vif = &sdata->vif;
3082:		info->control.jiffies = jiffies;
3083:		fwd_skb->dev = sdata->dev;
3084:		if (multicast) {
3085:			IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_mcast);
3086:			memcpy(fwd_hdr->addr2, sdata->vif.addr, ETH_ALEN);
3087:			/* update power mode indication when forwarding */
3088:			ieee80211_mps_set_frame_flags(sdata, NULL, fwd_hdr);
3089:		} else if (!mesh_nexthop_lookup(sdata, fwd_skb)) {
3090:			/* mesh power mode flags updated in mesh_nexthop_lookup */
3091:			IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_unicast);
3092:		} else {
3093:			/* unable to resolve next hop */
3094:			if (sta)
3095:				mesh_path_error_tx(sdata, ifmsh->mshcfg.element_ttl,
3096:						   hdr.addr3, 0,
3097:						   WLAN_REASON_MESH_PATH_NOFORWARD,
3098:						   sta->sta.addr);
3099:			IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_no_route);
3100:			kfree_skb(fwd_skb);
3101:			goto rx_accept;
3102:		}
3103:	
3104:		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, fwded_frames);
3105:		ieee80211_set_qos_hdr(sdata, fwd_skb);
3106:		ieee80211_add_pending_skb(local, fwd_skb);
3107:	
3108:	rx_accept:
3109:		if (!skb)
3110:			return RX_QUEUED;
3111:	
3112:		ieee80211_strip_8023_mesh_hdr(skb);
3113:	#endif
3114:	
3115:		return RX_CONTINUE;
3116:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 129787
							output: 20
							thoughts: 69
						

Here's my take on those thoughts:

**Investigating the Data Path of TDLS Frames in a Mesh Network**

Okay, so it seems like `ieee80211_rx_mesh_data` *also* isn't feeding data frames directly to the iface worker queue. That's a bit odd; I would have assumed it behaved similarly to other RX paths. Given the intricacies of TDLS, I need to understand how these TDLS frames are ultimately processed.

Rather than making assumptions, I need to get to the bottom of this. I'm going to shift my focus and examine every instance where `skb->protocol` gets explicitly set to `ETH_P_TDLS`. That should give me a good overview of the potential processing paths for these frames. I'll fire up `grepper` – I'll expand the search a bit to make sure I cover all possibilities, just to be thorough. This should illuminate where the TDLS frames are being routed and give me a clear picture of the overall data flow.

map[Expression:ETH_P_TDLS]

map[Output:drivers/net/wireless/intel/iwlwifi/mld/rx.c=1544=static int iwl_mld_build_rx_skb(struct iwl_mld *mld, struct sk_buff *skb,
--
drivers/net/wireless/intel/iwlwifi/mld/rx.c-1612-			      shdr->type != htons(ETH_P_PAE) &&
drivers/net/wireless/intel/iwlwifi/mld/rx.c:1613:			      shdr->type != htons(ETH_P_TDLS))))
drivers/net/wireless/intel/iwlwifi/mld/rx.c-1614-			skb->ip_summed = CHECKSUM_NONE;
--
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c=91=static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
--
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c-171-			      shdr->type != htons(ETH_P_PAE) &&
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c:172:			      shdr->type != htons(ETH_P_TDLS))))
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c-173-			skb->ip_summed = CHECKSUM_NONE;
--
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c=20=static int mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c-43-			if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c:44:			    ntohs(rx_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c-45-				mwifiex_process_tdls_action_frame(priv,
--
drivers/net/wireless/marvell/mwifiex/main.c=770=mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/main.c-778-	     ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/main.c:779:	     (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
drivers/net/wireless/marvell/mwifiex/main.c-780-		mwifiex_dbg(priv->adapter, DATA,
--
drivers/net/wireless/marvell/mwifiex/sta_rx.c=71=int mwifiex_process_rx_packet(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/sta_rx.c-148-	if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/sta_rx.c:149:	    ntohs(rx_pkt_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
drivers/net/wireless/marvell/mwifiex/sta_rx.c-150-		offset = (u8 *)local_rx_pd + rx_pkt_off;
--
drivers/net/wireless/marvell/mwifiex/tdls.c=464=static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-479-	memcpy(tf->sa, priv->curr_addr, ETH_ALEN);
drivers/net/wireless/marvell/mwifiex/tdls.c:480:	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
drivers/net/wireless/marvell/mwifiex/tdls.c-481-	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
--
drivers/net/wireless/marvell/mwifiex/wmm.c=808=mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/wmm.c-823-	    ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) {
drivers/net/wireless/marvell/mwifiex/wmm.c:824:		if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS)
drivers/net/wireless/marvell/mwifiex/wmm.c-825-			mwifiex_dbg(adapter, DATA,
--
include/linux/ieee80211.h=2579=static inline int ieee80211_get_tdls_action(struct sk_buff *skb)
--
include/linux/ieee80211.h-2585-
include/linux/ieee80211.h:2586:		if (get_unaligned_be16(tdls_data) == ETH_P_TDLS &&
include/linux/ieee80211.h-2587-		    tdls_data[2] == WLAN_TDLS_SNAP_RFTYPE &&
--
include/uapi/linux/if_ether.h-110-#define ETH_P_IBOE	0x8915		/* Infiniband over Ethernet	*/
include/uapi/linux/if_ether.h:111:#define ETH_P_TDLS	0x890D          /* TDLS */
include/uapi/linux/if_ether.h-112-#define ETH_P_FIP	0x8914		/* FCoE Initialization Protocol */
--
net/mac80211/iface.c=1779=static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
--
net/mac80211/iface.c-1798-
net/mac80211/iface.c:1799:		if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
net/mac80211/iface.c-1800-			ieee80211_process_tdls_channel_switch(sdata, skb);
--
net/mac80211/rx.c=3262=ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
--
net/mac80211/rx.c-3301-	if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
net/mac80211/rx.c:3302:						cpu_to_be16(ETH_P_TDLS))) {
net/mac80211/rx.c-3303-		struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
--
net/mac80211/rx.c-3310-		     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
net/mac80211/rx.c:3311:			rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
net/mac80211/rx.c-3312-			__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
--
net/mac80211/rx.c=4925=static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
--
net/mac80211/rx.c-5007-		 */
net/mac80211/rx.c:5008:		if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||
net/mac80211/rx.c-5009-			     payload->proto == fast_rx->control_port_protocol))
--
net/mac80211/tdls.c=791=ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-802-	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
net/mac80211/tdls.c:803:	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
net/mac80211/tdls.c-804-	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
--
net/mac80211/tx.c=2470=static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
--
net/mac80211/tx.c-2473-
net/mac80211/tx.c:2474:	return ethertype == ETH_P_TDLS &&
net/mac80211/tx.c-2475-	       skb->len > 14 &&
]

gemini-3-flash-preview

							input: 132596
							output: 56
							thoughts: 30
						

Here's my attempt at summarizing the thought process, tailored for an expert audience:

**Diving into the 802.11 Header**

Okay, my initial focus is on `include/linux/ieee80211.h:2586`. Immediately, I recognize this as a critical point within the Linux wireless stack's core definitions. My immediate instinct is to dissect that section of the header file. I need to understand what's defined there, the data structures, the enums, the constants – everything that revolves around that line. My mental checklist kicks in: possible relevant structures, associated function pointers, relevant macros. I anticipate it's likely a critical definition for something like a frame format, a key parameter, or perhaps a control structure related to a particular 802.11 feature or operational mode. I am eager to examine the specifics. The information at that location should provide immediate information.

map[ContextFile:include/linux/ieee80211.h IncludeLines:true Name:ieee80211_get_tdls_action]

map[SourceCode:2570:	/**
2571:	 * ieee80211_get_tdls_action - get TDLS action code
2572:	 * @skb: the skb containing the frame, length will not be checked
2573:	 * Return: the TDLS action code, or -1 if it's not an encapsulated TDLS action
2574:	 *	frame
2575:	 *
2576:	 * This function assumes the frame is a data frame, and that the network header
2577:	 * is in the correct place.
2578:	 */
2579:	static inline int ieee80211_get_tdls_action(struct sk_buff *skb)
2580:	{
2581:		if (!skb_is_nonlinear(skb) &&
2582:		    skb->len > (skb_network_offset(skb) + 2)) {
2583:			/* Point to where the indication of TDLS should start */
2584:			const u8 *tdls_data = skb_network_header(skb) - 2;
2585:	
2586:			if (get_unaligned_be16(tdls_data) == ETH_P_TDLS &&
2587:			    tdls_data[2] == WLAN_TDLS_SNAP_RFTYPE &&
2588:			    tdls_data[3] == WLAN_CATEGORY_TDLS)
2589:				return tdls_data[4];
2590:		}
2591:	
2592:		return -1;
2593:	}
 SourceFile:include/linux/ieee80211.h]

gemini-3-flash-preview

							input: 133343
							output: 32
							thoughts: 10
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and presented as if it were my own internal monologue:

**Investigating Function Callers**

Alright, I'm looking at a helper function here. The immediate question that jumps to mind, as always with any code I'm unfamiliar with, is: *who's using this?* Understanding the call graph is paramount. I need to know the entry points, how it's being invoked, and in what contexts. Knowing the calling functions gives me crucial clues about the function's purpose, the data it operates on, and potential side effects. Is this a widely used utility, or something specific to a narrow part of the codebase? Is it a critical component, or something more ancillary? This initial scoping is essential for any deeper analysis.

map[Name:ieee80211_get_tdls_action]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_report_used_skb SourceFile:net/mac80211/status.c SourceLine:770]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 133640
							output: 55
							thoughts: 35
						

Okay, here's my take on those thoughts, framed as an expert's internal monologue:

**Investigating `ieee80211_report_used_skb` in mac80211**

Right, let's dive into `ieee80211_report_used_skb` within `net/mac80211/status.c`. I need to understand exactly how this function is utilized. Given my experience, I'm already formulating some hypotheses. Is it related to reporting the status of SKBs (Socket Buffers) used for transmission? Does it handle their deallocation or tracking? The context within `status.c` suggests it's likely connected to reporting on the state of SKBs after transmission or reception, but the specifics are crucial. I need to see *how* it's called, *when* it's called, and *what* data it's processing to determine its full purpose and potential impact on performance or error handling within the wireless stack. I'm especially interested in whether it's involved in any kind of rate adaptation or QoS (Quality of Service) decisions, or perhaps simply logging for diagnostic purposes. Time to go hunting in the code!

map[ContextFile:net/mac80211/status.c IncludeLines:true Name:ieee80211_report_used_skb]

map[SourceCode: 733:	static void ieee80211_report_used_skb(struct ieee80211_local *local,
 734:					      struct sk_buff *skb, bool dropped,
 735:					      ktime_t ack_hwtstamp)
 736:	{
 737:		struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 738:		u16 tx_time_est = ieee80211_info_get_tx_time_est(info);
 739:		struct ieee80211_hdr *hdr = (void *)skb->data;
 740:		bool acked = info->flags & IEEE80211_TX_STAT_ACK;
 741:	
 742:		if (dropped)
 743:			acked = false;
 744:	
 745:		if (tx_time_est) {
 746:			struct sta_info *sta;
 747:	
 748:			rcu_read_lock();
 749:	
 750:			sta = sta_info_get_by_addrs(local, hdr->addr1, hdr->addr2);
 751:			ieee80211_sta_update_pending_airtime(local, sta,
 752:							     skb_get_queue_mapping(skb),
 753:							     tx_time_est,
 754:							     true);
 755:			rcu_read_unlock();
 756:		}
 757:	
 758:		if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
 759:			struct ieee80211_sub_if_data *sdata;
 760:	
 761:			rcu_read_lock();
 762:	
 763:			sdata = ieee80211_sdata_from_skb(local, skb);
 764:	
 765:			if (!sdata) {
 766:				skb->dev = NULL;
 767:			} else if (!dropped) {
 768:				/* Check to see if packet is a TDLS teardown packet */
 769:				if (ieee80211_is_data(hdr->frame_control) &&
 770:				    (ieee80211_get_tdls_action(skb) ==
 771:				     WLAN_TDLS_TEARDOWN)) {
 772:					ieee80211_tdls_td_tx_handle(local, sdata, skb,
 773:								    info->flags);
 774:				} else if (ieee80211_s1g_is_twt_setup(skb)) {
 775:					if (!acked) {
 776:						struct sk_buff *qskb;
 777:	
 778:						qskb = skb_clone(skb, GFP_ATOMIC);
 779:						if (qskb) {
 780:							skb_queue_tail(&sdata->status_queue,
 781:								       qskb);
 782:							wiphy_work_queue(local->hw.wiphy,
 783:									 &sdata->work);
 784:						}
 785:					}
 786:				} else {
 787:					ieee80211_mgd_conn_tx_status(sdata,
 788:								     hdr->frame_control,
 789:								     acked);
 790:				}
 791:			}
 792:	
 793:			rcu_read_unlock();
 794:		} else if (info->status_data_idr) {
 795:			ieee80211_report_ack_skb(local, skb, acked, dropped,
 796:						 ack_hwtstamp);
 797:		} else if (info->status_data) {
 798:			struct ieee80211_sub_if_data *sdata;
 799:	
 800:			rcu_read_lock();
 801:	
 802:			sdata = ieee80211_sdata_from_skb(local, skb);
 803:	
 804:			switch (u16_get_bits(info->status_data,
 805:					     IEEE80211_STATUS_TYPE_MASK)) {
 806:			case IEEE80211_STATUS_TYPE_SMPS:
 807:				ieee80211_handle_smps_status(sdata, acked,
 808:							     info->status_data);
 809:				break;
 810:			case IEEE80211_STATUS_TYPE_NEG_TTLM:
 811:				ieee80211_handle_teardown_ttlm_status(sdata, acked);
 812:				break;
 813:			}
 814:			rcu_read_unlock();
 815:		}
 816:	
 817:		if (!dropped && skb->destructor) {
 818:			skb->wifi_acked_valid = 1;
 819:			skb->wifi_acked = acked;
 820:		}
 821:	
 822:		ieee80211_led_tx(local);
 823:	
 824:		if (skb_has_frag_list(skb)) {
 825:			kfree_skb_list(skb_shinfo(skb)->frag_list);
 826:			skb_shinfo(skb)->frag_list = NULL;
 827:		}
 828:	}
 SourceFile:net/mac80211/status.c]

gemini-3-flash-preview

							input: 135637
							output: 56
							thoughts: 195
						

**Analyzing TX Status Reporting and Potential Remote Triggering**

Okay, so this code block is specifically for Transmission (TX) status reporting, which I already knew. It's not directly involved in the remote triggering mechanism via receive (RX), so I can focus on that aspect separately.

But wait, I need to revisit the `ieee80211_iface_work` function. There's a chance something relevant is buried in there. Specifically, this section here:

```c
1809:		while ((skb = skb_dequeue(&sdata->status_queue))) {
1810:			kcov_remote_start_common(skb_get_kcov_handle(skb));
1811:	
1812:			ieee80211_iface_process_status(sdata, skb);
1813:			consume_skb(skb);
1814:	
1815:			kcov_remote_stop();
1816:		}
```

It seems to be dequeuing SKBs from the `status_queue`, using the `kcov` remote mechanisms, and processing them with `ieee80211_iface_process_status`. I need to figure out what `ieee80211_iface_process_status` does in more detail and see if there's any link to remote triggering. Is there something in the status reporting process that I can leverage? My intuition says there is.

map[ContextFile:net/mac80211/iface.c IncludeLines:true Name:ieee80211_iface_process_status]

map[SourceCode:1761:	static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1762:						   struct sk_buff *skb)
1763:	{
1764:		struct ieee80211_mgmt *mgmt = (void *)skb->data;
1765:	
1766:		if (ieee80211_is_action(mgmt->frame_control) &&
1767:		    mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1768:			switch (mgmt->u.action.u.s1g.action_code) {
1769:			case WLAN_S1G_TWT_TEARDOWN:
1770:			case WLAN_S1G_TWT_SETUP:
1771:				ieee80211_s1g_status_twt_action(sdata, skb);
1772:				break;
1773:			default:
1774:				break;
1775:			}
1776:		}
1777:	}
 SourceFile:net/mac80211/iface.c]

gemini-3-flash-preview

							input: 136569
							output: 43
							thoughts: 381
						

**Investigating Potential TDLS Vulnerability**

Okay, let's refocus on that `ieee80211_process_tdls_channel_switch` function and, specifically, the `WARN_ON_ONCE(1)` call. I need to understand why it's being triggered. Is it possible that the `skb->protocol` field is being set to `ETH_P_TDLS` by something other than a genuine TDLS frame? That's the core question here.

If an attacker could craft a frame, not actually a TDLS frame, but that the mac80211 stack *thinks* is TDLS, then there's a problem. My initial thought is to look at how the protocol is determined. I know `rx.c` checks `h_proto == ETH_P_TDLS`, but where does `h_proto` originate? Ah, right, it's coming from something like `eth_type_trans`.

Wait a minute, the call stack is: `ieee80211_rx_h_data` AFTER `__ieee80211_data_to_8023`. So the 802.11 frame is being converted to an 802.3 frame FIRST. And `__ieee80211_data_to_8023` is where it gets interesting... It then calls `ieee80211_data_to_8023_exthdr`, which subsequently calls `ieee80211_get_8023_tunnel_proto`. That's the critical point.

`ieee80211_get_8023_tunnel_proto` checks for RFC1042 or Bridge-Tunnel encapsulation. Okay, I'm with you. If it's Bridge-Tunnel (which uses the SNAP OUI 00:00:f8), the protocol is set to the ethertype found within the SNAP header. *TDLS* uses SNAP OUI 00:00:00 and ethertype 0x890d. This looks like a vulnerability.

Time to revisit those header structures, `rfc1042_header` and `bridge_tunnel_header`, and map out these conditions more clearly.

map[ContextFile:net/wireless/util.c IncludeLines:true Name:rfc1042_header]

map[SourceCode:2736:	/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
2737:	/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
2738:	const unsigned char rfc1042_header[] __aligned(2) =
2739:		{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 SourceFile:net/wireless/util.c]

gemini-3-flash-preview

							input: 137649
							output: 41
							thoughts: 9
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**Navigating the Complexities**

Alright, so we're looking at some code, probably a data structure or an API, and I'm immediately drawn to `bridge_tunnel_header`. My mind's buzzing. "Bridge" and "Tunnel" together suggest this is a key component, probably related to some kind of intermediary or abstraction layer. It immediately brings to mind concepts of connectivity, routing, perhaps data transformation or protocol adaptation. Is it designed to abstract away complexities in some network environment, maybe handling different network protocols and topologies? Or perhaps it's related to some kind of secured tunnel for data? Is this something that deals with security? This is definitely a significant header to understand within the broader framework. I'll need to dig deeper. It's not just a metadata field, it sounds like an architectural building block.

map[ContextFile:net/wireless/util.c IncludeLines:true Name:bridge_tunnel_header]

map[SourceCode:2742:	/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
2743:	const unsigned char bridge_tunnel_header[] __aligned(2) =
2744:		{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 SourceFile:net/wireless/util.c]

gemini-3-flash-preview

							input: 138022
							output: 56
							thoughts: 981
						

**TDLS Frame Processing: A Deep Dive**

Okay, so I'm digging into how TDLS frames are handled, and it seems like there are a few interesting spots to examine. The TDLS frames use the `rfc1042_header` (OUI 00:00:00) and ethertype `ETH_P_TDLS` (0x890d), so that's my starting point.

In `ieee80211_get_8023_tunnel_proto`, the code checks for the SNAP header and specifically the TDLS ethertype. If the frame has the right SNAP OUI and ethertype, the function sets `h_proto` to `ETH_P_TDLS` in the converted Ethernet header. Easy enough.

Now, things get interesting in `ieee80211_rx_h_data`. Here, it checks if `h_proto` is `ETH_P_TDLS`. If it is, and if it also matches the expected TDLS frame characteristics (correct payload type, category, and action codes – particularly channel switch requests or responses), it sets `skb->protocol = ETH_P_TDLS` and queues it. If these TDLS specific checks don't pass, the frame gets dropped.

That's when I thought: what if the `action_code` is a channel switch request in `rx.c`, but it somehow *isn't* a channel switch request by the time `tdls.c` handles it? That's a potential UAF, but that's not what I'm looking for.

I wondered if there were other routes to `ieee80211_process_tdls_channel_switch`. Could `skb->protocol` already be set to `ETH_P_TDLS` when it hits `ieee80211_rx_h_data`? But no, it's typically not set yet.

Then I realized, what about TDLS frames *that aren't* channel switch frames? These go to `ieee80211_deliver_skb`, and *that* function sets `skb->protocol = ETH_P_TDLS` before calling `netif_receive_skb`. Could this lead to a vulnerability? I quickly ruled out `netif_receive_skb` leading to an interface worker, because that's not what the code does.

Then I struck gold. What if the frame is queued to `sdata->skb_queue` by a different function entirely? I quickly checked all callers of `__ieee80211_queue_skb_to_iface`. I initially missed one. Then I re-checked and found `ieee80211_rx_reorder_ampdu` calls `ieee80211_queue_skb_to_iface`. But, then I saw that `ieee80211_queue_skb_to_iface` sets `skb->protocol = 0`. So, this is not a useful path.

The crucial point is: *if* a TDLS frame *somehow* gets into the system with `skb->protocol` already set to `ETH_P_TDLS`, or if a channel switch frame doesn't meet the checks, something unusual might happen. This warrants a closer look at the A-MPDU reordering process and any other potential queuing mechanisms. Looks like `ieee80211_rx_reorder_ampdu` is a key area of investigation.

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_reorder_ampdu]

map[SourceCode:1441:	/*
1442:	 * Reorder MPDUs from A-MPDUs, keeping them on a buffer. Returns
1443:	 * true if the MPDU was buffered, false if it should be processed.
1444:	 */
1445:	static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx,
1446:					       struct sk_buff_head *frames)
1447:	{
1448:		struct sk_buff *skb = rx->skb;
1449:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1450:		struct sta_info *sta = rx->sta;
1451:		struct tid_ampdu_rx *tid_agg_rx;
1452:		u16 sc;
1453:		u8 tid, ack_policy;
1454:	
1455:		if (!ieee80211_is_data_qos(hdr->frame_control) ||
1456:		    is_multicast_ether_addr(hdr->addr1))
1457:			goto dont_reorder;
1458:	
1459:		/*
1460:		 * filter the QoS data rx stream according to
1461:		 * STA/TID and check if this STA/TID is on aggregation
1462:		 */
1463:	
1464:		if (!sta)
1465:			goto dont_reorder;
1466:	
1467:		ack_policy = *ieee80211_get_qos_ctl(hdr) &
1468:			     IEEE80211_QOS_CTL_ACK_POLICY_MASK;
1469:		tid = ieee80211_get_tid(hdr);
1470:	
1471:		tid_agg_rx = rcu_dereference(sta->ampdu_mlme.tid_rx[tid]);
1472:		if (!tid_agg_rx) {
1473:			if (ack_policy == IEEE80211_QOS_CTL_ACK_POLICY_BLOCKACK &&
1474:			    !test_bit(tid, rx->sta->ampdu_mlme.agg_session_valid) &&
1475:			    !test_and_set_bit(tid, rx->sta->ampdu_mlme.unexpected_agg))
1476:				ieee80211_send_delba(rx->sdata, rx->sta->sta.addr, tid,
1477:						     WLAN_BACK_RECIPIENT,
1478:						     WLAN_REASON_QSTA_REQUIRE_SETUP);
1479:			goto dont_reorder;
1480:		}
1481:	
1482:		/* qos null data frames are excluded */
1483:		if (unlikely(hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_NULLFUNC)))
1484:			goto dont_reorder;
1485:	
1486:		/* not part of a BA session */
1487:		if (ack_policy == IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
1488:			goto dont_reorder;
1489:	
1490:		/* new, potentially un-ordered, ampdu frame - process it */
1491:	
1492:		/* reset session timer */
1493:		if (tid_agg_rx->timeout)
1494:			tid_agg_rx->last_rx = jiffies;
1495:	
1496:		/* if this mpdu is fragmented - terminate rx aggregation session */
1497:		sc = le16_to_cpu(hdr->seq_ctrl);
1498:		if (sc & IEEE80211_SCTL_FRAG) {
1499:			ieee80211_queue_skb_to_iface(rx->sdata, rx->link_id, NULL, skb);
1500:			return;
1501:		}
1502:	
1503:		/*
1504:		 * No locking needed -- we will only ever process one
1505:		 * RX packet at a time, and thus own tid_agg_rx. All
1506:		 * other code manipulating it needs to (and does) make
1507:		 * sure that we cannot get to it any more before doing
1508:		 * anything with it.
1509:		 */
1510:		if (ieee80211_sta_manage_reorder_buf(rx->sdata, tid_agg_rx, skb,
1511:						     frames))
1512:			return;
1513:	
1514:	 dont_reorder:
1515:		__skb_queue_tail(frames, skb);
1516:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 141209
							output: 56
							thoughts: 291
						

**Analyzing the IEEE 802.11 Data Path**

Okay, so I see a call to `ieee80211_queue_skb_to_iface` in the code, but hold on, something seems off. I think I've spotted a potential issue here. If the `skb->protocol` is indeed set to `ETH_P_TDLS` within `ieee80211_rx_h_data`, and then the frame gets buffered for reordering, it means the frame hasn't actually been queued to the interface worker yet. It's sitting in that reordering buffer. This is key.

Now, when that reordering buffer is eventually flushed, those frames need to be processed. I'm trying to figure out where that happens, specifically. Ah, right, it's back in `ieee80211_rx_h_data`. I'm seeing this:

```c
3253:		ieee80211_rx_reorder_ampdu(rx, &frames);
3254:	
3255:		while ((rx->skb = __skb_dequeue(&frames))) {
3256:			res = ieee80211_rx_h_data(rx);
```

So, `ieee80211_rx_reorder_ampdu` is called, and then there's a loop that calls `ieee80211_rx_h_data` again... wait, is that a recursive call? No, it's actually just within the same function. I need to make sure I understand the context around that `ieee80211_rx_reorder_ampdu` call completely. Time to step back and re-examine the surrounding logic.

requested entity does not exist

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_h_data_qos]

map[SourceCode: SourceFile:]

gemini-3-flash-preview

							input: 141981
							output: 29
							thoughts: 44
						

Okay, here's my summary, taking on the persona you requested:

**Digging into the 802.11 Data Reception**

Right, back to this `ieee80211_rx_h_data` function. I need to refresh my memory and pinpoint the exact call site for `ieee80211_rx_reorder_ampdu`. I'm pretty sure it's involved in the A-MPDU reordering process, but I want to be absolutely certain of the call stack. A careful re-examination of the code around that point might offer a helpful insight, if I've been missing something the previous times I've looked at it. The finer details of data reassembly always demand close attention.

map[Expression:ieee80211_rx_reorder_ampdu]

map[Output:net/mac80211/rx.c=1346=static bool ieee80211_sta_manage_reorder_buf(struct ieee80211_sub_if_data *sdata,
--
net/mac80211/rx.c-1444- */
net/mac80211/rx.c:1445:static void ieee80211_rx_reorder_ampdu(struct ieee80211_rx_data *rx,
net/mac80211/rx.c-1446-				       struct sk_buff_head *frames)
--
net/mac80211/rx.c=4261=static void ieee80211_invoke_rx_handlers(struct ieee80211_rx_data *rx)
--
net/mac80211/rx.c-4277-
net/mac80211/rx.c:4278:	ieee80211_rx_reorder_ampdu(rx, &reorder_release);
net/mac80211/rx.c-4279-
]

gemini-3-flash-preview

							input: 142524
							output: 42
							thoughts: 2245
						

**mac80211 TDLS Channel Switch Vulnerability Analysis**

Okay, so here's what I've been thinking through. It starts in `ieee80211_invoke_rx_handlers`, specifically with frames released from the reorder buffer via `ieee80211_rx_reorder_ampdu`, which then calls `ieee80211_rx_h_data`. My initial thought was centered around how `ieee80211_rx_h_data` handles TDLS frames. I wondered if setting `skb->protocol` to `ETH_P_TDLS` would automatically queue the frame, but I found that it immediately returns `RX_QUEUED` if set.

Digging deeper, I explored the checks within `ieee80211_rx_h_data` and particularly the TDLS frame processing within. I quickly dismissed scenarios where certain fields were incorrectly populated. Specifically, if `tf->action_code` was a `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `RESPONSE`, I confirmed the code *does* check the `tf->category` to be `WLAN_CATEGORY_TDLS` and the `tf->payload_type`.

Then I hit something interesting: the `WARN_ON_ONCE(1)` in `tdls.c` triggered my attention. This only occurs in the `default` case of a `switch` statement based on `tf->action_code`. I realized that this is the key. While the normal codes are expected, if something else is passed it could trigger the `WARN`.

My next thought was if an attacker can send a TDLS setup request in a data frame, `ieee80211_rx_h_data` will NOT queue it to the iface worker, so, no. If the attacker crafts a frame that is both a channel switch AND something else, that is also not possible, since the TDLS checks are performed.

Then I checked for other ways to queue, besides the main path, which led to a deeper look at `__ieee80211_queue_skb_to_iface`. I made sure to check for `ieee80211_rx_h_mgmt` too. That one calls `ieee80211_queue_skb_to_iface` which does set `skb->protocol = 0`. Not what I wanted!

I kept going back to `ieee80211_rx_h_data` and noticed the potential for a TDLS frame to be delivered to the local stack via `ieee80211_deliver_skb` and `netif_receive_skb`. This is interesting: could `netif_receive_skb` somehow lead back to the mac80211 iface worker? I explored virtual interfaces, like bridges or VLANs, but those wouldn't be the path. Also, monitor interfaces don't use the iface worker for data frames. And AP_VLAN is irrelevant for us. Similarly, mesh interfaces, the frame would just be forwarded, as would any interface other than a STATION.

The key I identified was a legitimate channel switch frame. I checked `ieee80211_process_tdls_channel_switch` and confirmed that if the driver *didn't* support channel switching, the function would simply return without warning. I also confirmed that if the frame was malformed (too short), it would also not be queued, and similarly, if the `action_code` or `category` or `payload_type` were incorrect, it wouldn't be queued either.

Finally, the critical path: a valid TDLS channel switch frame gets queued. The function `ieee80211_process_tdls_channel_switch` will get called, and then `skb_linearize` gets called. This is the crux. `skb_linearize` causes the potential for a use-after-free, since `tf->action_code` is accessed after it gets reallocated. If the driver uses paged RX, then EVERY channel switch frame triggers this UAF. This will read something else and it will hit the `WARN`.

Now I need to check the `git log` and see if there are any other `TDLS` and `WARN` issues.

map[MessageRegexps:[TDLS WARN] PathPrefix:net/mac80211/tdls.c]

map[Output:16ecdab5446f wifi: mac80211: reject TDLS operations when station is not associated
]

gemini-3-flash-preview

							input: 145801
							output: 24
							thoughts: 15
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and presented as if it were my own internal monologue:

**Checking the Digest**

Alright, let's dive into this. The initial thought, the implicit task, is "check `16ecdab5446f`." Given the format, my immediate assumption is that this is likely a cryptographic hash, a digest, or perhaps a unique identifier within a system. My expertise tells me it's probably representing some data or state; the exact meaning will depend on the context and the hashing algorithm used. My internal databases are starting to spin...What kind of system? What's the potential significance? Is this a file hash, a transaction identifier, a database record key, a commit hash from a version control system? I need more context to quickly ascertain how best to approach its analysis. My next move will depend on what system I am evaluating. I need a broader overview.

map[Commit:16ecdab5446f]

map[Output:commit 16ecdab5446f15a61ec88eb0d23d25d009821db0
Author: Moon Hee Lee <moonhee.lee.ca@gmail.com>
Date:   Tue Jul 15 16:09:05 2025 -0700

    wifi: mac80211: reject TDLS operations when station is not associated
    
    syzbot triggered a WARN in ieee80211_tdls_oper() by sending
    NL80211_TDLS_ENABLE_LINK immediately after NL80211_CMD_CONNECT,
    before association completed and without prior TDLS setup.
    
    This left internal state like sdata->u.mgd.tdls_peer uninitialized,
    leading to a WARN_ON() in code paths that assumed it was valid.
    
    Reject the operation early if not in station mode or not associated.
    
    Reported-by: syzbot+f73f203f8c9b19037380@syzkaller.appspotmail.com
    Closes: https://syzkaller.appspot.com/bug?extid=f73f203f8c9b19037380
    Fixes: 81dd2b882241 ("mac80211: move TDLS data to mgd private part")
    Tested-by: syzbot+f73f203f8c9b19037380@syzkaller.appspotmail.com
    Signed-off-by: Moon Hee Lee <moonhee.lee.ca@gmail.com>
    Link: https://patch.msgid.link/20250715230904.661092-2-moonhee.lee.ca@gmail.com
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index 94714f8ffd22..ba5fbacbeeda 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -1422,7 +1422,7 @@ int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
 	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
 		return -EOPNOTSUPP;
 
-	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+	if (sdata->vif.type != NL80211_IFTYPE_STATION || !sdata->vif.cfg.assoc)
 		return -EINVAL;
 
 	switch (oper) {
]

gemini-3-flash-preview

							input: 146789
							output: 31
							thoughts: 2064
						

**UAF Vulnerability in TDLS Channel Switch Handling**

Okay, here's what I've got. I'm looking at `ieee80211_tdls_oper`, specifically how channel switch frames are processed. It's triggered by `nl80211` which means user space, not by remote frames.

I've got it. I'm focusing on the `ieee80211_process_tdls_channel_switch` function. It appears that `tf->action_code` within the function is accessed using a pointer `tf` that is initialized from `skb->data`. Problem. The start of `struct ieee80211_tdls_data` matches `struct ethhdr`. Therefore, `tf->action_code` is at offset 16 of the Ethernet header.

The code assumes that `skb->data` will always point to valid TDLS data. But if the frame isn't an Ethernet frame, then it shouldn't get queued in the first place, or should it? The `ieee80211_rx_h_data` does convert everything to Ethernet, so that is fine. Mesh frames are fine. Station frames that are channel switch frames and queued... that's where things get interesting. The worker calls `ieee80211_process_tdls_channel_switch` which then calls `skb_linearize`. The UAF manifests after the call to `skb_linearize`.

Here is the crux of the issue: if `skb_linearize` reallocates the skb, then `tf` becomes a stale pointer. The `skb->data` pointer, *is* updated, but the code doesn't update `tf` to reflect the new address. If the code did:
```c
if (skb_linearize(skb))
    return;
tf = (void *)skb->data;
switch (tf->action_code) {
```
It would be safe, but it doesn't.

Yes! Confirmed. It's a pointer, not a copy. It's a UAF.

How can the UAF trigger the `WARN`? The `WARN` triggers if `tf->action_code` is not `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `RESPONSE`. The offsets are the same in `rx.c` and `tdls.c` to check `action_code`. I have to look at how `skb->data` changes between those two contexts. If the driver modified `tf->action_code` the vulnerability could be exploited.

So the UAF exists, the question is, how easily can it be exploited? If the memory that `skb_linearize` copies the data into has data that is *not* `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` or `RESPONSE`, then the `WARN` will be triggered. So it *can* be triggered. It only needs to happen once because it is `WARN_ON_ONCE(1)`.

Let's make sure there isn't some weird alignment issue. The offsets are the same in `rx.c` and `tdls.c`. The `skb->protocol` is set to `ETH_P_TDLS` by `ieee80211_deliver_skb`. So that path is okay. The local stack can't re-queue it. The TX path is irrelevant.

It is possible the frame is queued to `sdata->skb_queue` by `ieee80211_queue_skb_to_iface`, but all callers are already checked. The `ieee80211_rx_h_data` function isn't called multiple times for the same skb. The driver is not modifying `tf->action_code`. `skb_linearize` is *causing* the problem!

Here's another wrinkle. When handling `h_proto`, the code checks `((struct ethhdr *)rx->skb->data)->h_proto == cpu_to_be16(ETH_P_TDLS)`. The `h_proto` field is at offset 12, while `tf->action_code` is at offset 16. So this confirms my analysis.

What about non-Ethernet frames? The code converts 802.11 to 802.3 and removes SNAP. This is fine.

A-MSDU frames are handled, so that's not it.

What about TDLS action frames (Category 12), those management frames? These are handled by `ieee80211_

map[Expression:skb->protocol\s*=\s*.*ETH_P_TDLS]

map[Output:net/mac80211/iface.c=1779=static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
--
net/mac80211/iface.c-1798-
net/mac80211/iface.c:1799:		if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
net/mac80211/iface.c-1800-			ieee80211_process_tdls_channel_switch(sdata, skb);
--
net/mac80211/rx.c=3262=ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
--
net/mac80211/rx.c-3310-		     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
net/mac80211/rx.c:3311:			rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
net/mac80211/rx.c-3312-			__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
]

gemini-3-flash-preview

							input: 150261
							output: 18
							thoughts: 1915
						

**mac80211 TDLS Frame Processing Vulnerability Analysis**

Okay, so I've been digging into this mac80211 issue related to TDLS frame handling, and I think I've found a couple of pretty nasty vulnerabilities, both of them Use-After-Free (UAF) flaws. The code path that's grabbed my attention starts with a TDLS frame received on a STATION interface.

The initial thought process focused on channel switch frames and the `ieee80211_rx_h_data` function. I was honing in on this check:

```c
(tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
 tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)
```

...because it seemed like a potential entry point for unexpected behavior and queueing of frames, if `action_code` was manipulated. I initially considered some misinterpretation of action codes, specifically `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` (value 6) or `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE` (value 7), and if there were any others that could be confused. I verified that there were not.

Digging deeper, I examined `ieee80211_process_tdls_channel_switch`, and that's where the first alarm bell started to ring:

```c
struct ieee80211_tdls_data *tf = (void *)skb->data;
switch (tf->action_code) {
```

The `action_code` is a `u8`, which is significant. If there's memory corruption from a stale `tf` due to `skb_linearize`, it could hold anything, and the switch case could go to default or be triggered by an incorrect value.

Then I shifted back to `ieee80211_rx_h_data`, which flagged a more direct UAF.

```c
struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
if (pskb_may_pull(rx->skb, offsetof(struct ieee80211_tdls_data, u)) &&
    tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
    tf->category == WLAN_CATEGORY_TDLS &&
    (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
```

Here, `tf` is assigned *before* `pskb_may_pull` is called. However, `pskb_may_pull` might change `skb->data`! If `pskb_may_pull` reallocates the skb buffer, the `tf` pointer becomes stale and points to freed memory, leading to a Use-After-Free when lines 3307-3310 use `tf`. This is a classic RX path UAF. The attacker controls the frame's structure and contents, making this remotely exploitable.

My understanding is that a remote attacker could trigger this simply by sending a TDLS frame with the header crossing the linear/frag boundary of the SKB, which depends on the driver's SKB allocation strategy.

The potential ramifications of the first UAF in `ieee80211_rx_h_data` are quite significant. If `tf->action_code` is garbage due to the UAF, mac80211 might mistakenly queue a frame as a channel switch frame, even if it's not. The worker could then call `ieee80211_process_tdls_channel_switch`, and the `default` case could be triggered, resulting in a `WARN`.

After a deeper dive, I uncovered that the UAF in `tdls.c` is even easier to trigger, as `skb_linearize` always reallocates if the SKB is non-linear, which is simple for an attacker to achieve by including many IEs.

My working theory for triggering the `WARN` is this:

1.  Attacker sends a valid TDLS Channel Switch Request frame.
2.  Attacker adds many dummy IEs to increase the frame size (e.g., 1000 bytes)
3.  Attacker ensures the frame is received as a non-linear skb (either by using a driver that does this, or if the NIC fragments it).
4.  `ieee80211_rx_h_data` sees it's a channel switch frame (it's valid

no matches

map[Expression:CVE.*TDLS]

map[Output:]

gemini-3-flash-preview

							input: 153233
							output: 24
							thoughts: 14
						

Okay, here's my summary, presented as a stream of thought:

**Focusing the Search: TDLS in Commits**

Right, let's get down to brass tacks. I need to zero in on specific instances. Thinking strategically, my first move will be to directly target the commit messages. I'm going to leverage my search capabilities, I'll go directly to the source - the version control system. I'll search for occurrences of "TDLS" within those messages. That should give me a focused view of how "TDLS" is being handled within the project's evolution. No fluff, just the relevant data. This is the most efficient starting point to establish the extent of TDLS's presence and context.

map[Count:20 MessageRegexps:[TDLS]]

map[Output:7d73872d949c wifi: mac80211: check tdls flag in ieee80211_tdls_oper
68eb1b791ac8 wifi: mac80211: pass frame type to element parsing
b089c415e0a9 wifi: iwlwifi: stop supporting iwl_omi_send_status_notif ver 1
d2af710d6d50 wifi: iwlwifi: mvm/fw: Avoid -Wflex-array-member-not-at-end warnings
16ecdab5446f wifi: mac80211: reject TDLS operations when station is not associated
526b000991b5 wifi: rtw88: Fix macid assigned to TDLS station
6f9e701c16a7 wifi: mac80211: fix deactivated link CSA
d19b9ca761e7 wifi: mwifiex: make locally used function static
67128af05c64 wifi: iwlwifi: mld: remove AP keys only for AP STA
014ca1ac6484 wifi: iwlwifi: fw: api: tdls: remove MVM_ from name
687a7c8a7227 wifi: mac80211: change disassoc sequence a bit
a10723ced430 wifi: mac80211: add an option to filter a sta from being flushed
b23af47921a7 wifi: mac80211: chan: calculate min_def also for client mode
e2e25113473b wifi: brcmfmac: Remove unused brcmf_cfg80211_get_iftype()
d0847e16ca2a wifi: mwifiex: cleanup struct mwifiex_auto_tdls_peer
607bbdb49ccb perf trace: Augment non-syscall tracepoints with enum arguments with BTF
0b2d9d9aec2b wifi: mac80211: correcty limit wider BW TDLS STAs
d42fcaece036 wifi: mac80211: add ieee80211_tdls_sta_link_id()
07fba2277fce wifi: mac80211: remove TDLS peers on link deactivation
85977fc0aa48 wifi: mac80211: remove TDLS peers only on affected link
]

gemini-3-flash-preview

							input: 154046
							output: 1019
							thoughts: 2494
						

**Analysis of the TDLS Channel Switch Vulnerability**

Okay, here's the breakdown of what I've figured out about this potential vulnerability. Initially, I was struggling to pin down a reliable way to trigger the Use-After-Free (UAF) bug. I needed to understand *how* a crafted packet could lead to this specific `WARN_ON_ONCE(1)` warning the user mentioned.

First, I realized I needed to carefully examine how the `skb_linearize` function behaved. Does it actually reallocate memory? The code shows that if the SKB (Socket Buffer) is *already* linear, it does nothing. But, if it's not linear, it calls `__skb_linearize`, which itself relies on `__pskb_pull_tail`. And *that's* the key. `__pskb_pull_tail` reallocates the buffer if needed – either because the current buffer isn't large enough or, crucially, if the buffer is shared.

The important point is that, usually a freshly-received skb is not shared, but if it's non-linear it will *always* reallocate. So, the question became, where is this `skb_linearize` used in the vulnerable code?

I found it in `ieee80211_process_tdls_channel_switch`. Specifically:

```c
if (skb_linearize(skb))
    return;
```

This is where the UAF manifests itself! If `skb_linearize` *doesn't* return zero (meaning reallocation occurred), the code just returns, potentially leaving a stale pointer (`tf`) to old memory. The code then uses this stale pointer later in a switch statement, a classic UAF scenario.

Now, how could this UAF result in the `WARN_ON_ONCE(1)`? The user says it can be triggered by a "crafted TDLS frame." I needed to figure out exactly *how* that crafted frame leads to the warning.

I considered the warning might trigger due to overwritten memory, with `tf->action_code` being changed by another allocation in the worker thread. However, there's a more direct way: The crucial point is that if memory *is* overwritten, the `WARN` won't trigger if the memory is overwritten to a valid action code.

Then I realized that `tf->action_code` might not be read correctly *in the first place*. What if a prior process causes the attacker to control the contents of the freed memory?

Then the critical insight hit: the real vulnerability is in `rx.c`:

```c
struct ieee80211_tdls_data *tf = (void *)rx->skb->data;

if (pskb_may_pull(rx->skb,
                  offsetof(struct ieee80211_tdls_data, u)) &&
    tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
```

If `pskb_may_pull` reallocates the buffer, `tf` becomes stale. If the attacker *controls* the memory that's freed (maybe through fragmentation), they can make mac80211 *think* it's a channel switch frame. `ieee80211_rx_h_data` will see this corrupted frame and queue it for the worker.

When the worker thread gets the *real* frame and examines it (with a fresh `skb->data` pointer), it will see an action code different from 6 or 7, and hit the `default` case, triggering the `WARN_ON_ONCE(1)`!

This is the perfect attack path:

1.  The attacker sends a TDLS Setup Request frame (action code 0).
2.  The attacker makes sure the frame is fragmented to trigger the reallocation.
3.  The attacker wins the race to overwrite the freed memory. The memory contains data that causes the 16th byte to be 6 or 7.
4.  `ieee80211_rx_h_data` mistakenly processes the overwritten value as a channel switch request.
5.  It sets `skb->protocol = ETH_P_TDLS` and queues it.
6.  The worker calls `ieee80211_process_tdls_channel_switch`.
7.  Now, the code looks at `skb->data`, which is the correct data, but sees a real `action_code` of 0 (the real value).
8.  This hits the `default` case.
9.  This triggers `WARN_ON_ONCE(1)`!

gemini-3.1-pro-preview

							input: 90871
							output: 385
							thoughts: 0
						

map[Question:Wait, the bug report says:
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_setup_cfm_ies net/mac80211/tdls.c:611 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_ies net/mac80211/tdls.c:762 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_build_mgmt_packet_data+0x2ea1/0x4050 net/mac80211/tdls.c:984, CPU#0: syz.0.596/6699

It is in ieee80211_tdls_add_setup_cfm_ies, not in ieee80211_process_tdls_channel_switch.
Can you re-evaluate if it is remotely triggerable?
The warning is:
!sta || !ap_sta
WARN_ON_ONCE(!sta || !ap_sta)

The syzkaller reproducer uses netlink socket to send NL80211_CMD_TDLS_MGMT command.
Can a remote attacker trigger this warning by sending a TDLS frame over the air?]

map[Answer:The warning at `net/mac80211/tdls.c:611` in `ieee80211_tdls_add_setup_cfm_ies` is **not remotely triggerable** by an attacker sending a TDLS frame over the air.

### Analysis

1.  **Trigger Point**: The warning `WARN_ON_ONCE(!sta || !ap_sta)` is located in `ieee80211_tdls_add_setup_cfm_ies`. This function is responsible for adding Information Elements (IEs) to a **TDLS Setup Confirm** frame during its construction.
2.  **Call Path**:
    *   The function is called by `ieee80211_tdls_add_ies` only when the `action_code` is `WLAN_TDLS_SETUP_CONFIRM`.
    *   `ieee80211_tdls_add_ies` is called by `ieee80211_tdls_build_mgmt_packet_data` during the packet transmission process.
    *   The transmission of a `WLAN_TDLS_SETUP_CONFIRM` frame is initiated by the `ieee80211_tdls_mgmt` function.
    *   `ieee80211_tdls_mgmt` is the kernel handler for the `NL80211_CMD_TDLS_MGMT` Netlink command.

3.  **Local vs. Remote**:
    *   The `NL80211_CMD_TDLS_MGMT` command is a local command sent from userspace (typically by `wpa_supplicant`) to the kernel.
    *   In the Linux kernel's mac80211 implementation, TDLS management frames (like Setup Request, Response, and Confirm) are handled by userspace. The kernel does not automatically respond to incoming TDLS setup frames with a Setup Confirm frame.
    *   When a remote attacker sends a TDLS frame over the air, mac80211 receives it and passes it up to userspace. It does **not** trigger the `ieee80211_tdls_add_setup_cfm_ies` function directly.

4.  **Why the Warning Triggers**:
    *   The warning triggers if `sta_info_get(sdata, peer)` returns `NULL`. This happens if there is no station entry in the kernel for the target peer MAC address.
    *   The syzkaller reproducer triggers this by manually sending an `NL80211_CMD_TDLS_MGMT` command with the `WLAN_TDLS_SETUP_CONFIRM` action code and a random MAC address that has no corresponding station entry in the kernel.
    *   While a remote attacker could send a TDLS Setup Response to a victim, the victim's userspace (`wpa_supplicant`) would only respond with a Setup Confirm if it was already in the process of a TDLS setup with that peer, in which case it would have already added the station to the kernel, preventing the `NULL` lookup.

### Conclusion
The vulnerability is a local denial-of-service (or rather, a kernel warning trigger) that requires `CAP_NET_ADMIN` privileges to execute the Netlink command. It cannot be triggered by a remote attacker over the air because the affected code path is only reachable through a specific local management command and is not part of any automatic remote frame processing logic.]

gemini-3-flash-preview

You are a capable Linux kernel developer tasked with researching complex questions
about kernel source code. You will be given a concrete question, and need to provide
a concrete answer.
Use tools extensively while researching the question. Don't make assumptions,
or rely on your previous knowledge about the kernel source code, use available tools
to access the actual source code.
Use all available sources of information:
 - kernel source code
 - documentation in the Documentation dir in the source tree
 - git commits descriptions, git blame

Prefer calling several tools at the same time to save round-trips.

Wait, the bug report says:
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_setup_cfm_ies net/mac80211/tdls.c:611 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_add_ies net/mac80211/tdls.c:762 [inline], CPU#0: syz.0.596/6699
WARNING: net/mac80211/tdls.c:611 at ieee80211_tdls_build_mgmt_packet_data+0x2ea1/0x4050 net/mac80211/tdls.c:984, CPU#0: syz.0.596/6699

It is in ieee80211_tdls_add_setup_cfm_ies, not in ieee80211_process_tdls_channel_switch.
Can you re-evaluate if it is remotely triggerable?
The warning is:
!sta || !ap_sta
WARN_ON_ONCE(!sta || !ap_sta)

The syzkaller reproducer uses netlink socket to send NL80211_CMD_TDLS_MGMT command.
Can a remote attacker trigger this warning by sending a TDLS frame over the air?

The warning at `net/mac80211/tdls.c:611` in `ieee80211_tdls_add_setup_cfm_ies` is **not remotely triggerable** by an attacker sending a TDLS frame over the air.

### Analysis

1.  **Trigger Point**: The warning `WARN_ON_ONCE(!sta || !ap_sta)` is located in `ieee80211_tdls_add_setup_cfm_ies`. This function is responsible for adding Information Elements (IEs) to a **TDLS Setup Confirm** frame during its construction.
2.  **Call Path**:
    *   The function is called by `ieee80211_tdls_add_ies` only when the `action_code` is `WLAN_TDLS_SETUP_CONFIRM`.
    *   `ieee80211_tdls_add_ies` is called by `ieee80211_tdls_build_mgmt_packet_data` during the packet transmission process.
    *   The transmission of a `WLAN_TDLS_SETUP_CONFIRM` frame is initiated by the `ieee80211_tdls_mgmt` function.
    *   `ieee80211_tdls_mgmt` is the kernel handler for the `NL80211_CMD_TDLS_MGMT` Netlink command.

3.  **Local vs. Remote**:
    *   The `NL80211_CMD_TDLS_MGMT` command is a local command sent from userspace (typically by `wpa_supplicant`) to the kernel.
    *   In the Linux kernel's mac80211 implementation, TDLS management frames (like Setup Request, Response, and Confirm) are handled by userspace. The kernel does not automatically respond to incoming TDLS setup frames with a Setup Confirm frame.
    *   When a remote attacker sends a TDLS frame over the air, mac80211 receives it and passes it up to userspace. It does **not** trigger the `ieee80211_tdls_add_setup_cfm_ies` function directly.

4.  **Why the Warning Triggers**:
    *   The warning triggers if `sta_info_get(sdata, peer)` returns `NULL`. This happens if there is no station entry in the kernel for the target peer MAC address.
    *   The syzkaller reproducer triggers this by manually sending an `NL80211_CMD_TDLS_MGMT` command with the `WLAN_TDLS_SETUP_CONFIRM` action code and a random MAC address that has no corresponding station entry in the kernel.
    *   While a remote attacker could send a TDLS Setup Response to a victim, the victim's userspace (`wpa_supplicant`) would only respond with a Setup Confirm if it was already in the process of a TDLS setup with that peer, in which case it would have already added the station to the kernel, preventing the `NULL` lookup.

### Conclusion
The vulnerability is a local denial-of-service (or rather, a kernel warning trigger) that requires `CAP_NET_ADMIN` privileges to execute the Netlink command. It cannot be triggered by a remote attacker over the air because the affected code path is only reachable through a specific local management command and is not part of any automatic remote frame processing logic.

gemini-3-flash-preview

							input: 3567
							output: 60
							thoughts: 262
						

**Re-Evaluating the Remote Attack Surface**

Okay, so the user's pointed out something important. The warning, that `WARN_ON_ONCE` at `net/mac80211/tdls.c:611`, is actually located within `ieee80211_tdls_add_setup_cfm_ies`, not the channel switch function as I initially thought. This means I need to re-evaluate whether this condition, `!sta || !ap_sta`, can be triggered remotely, and if so, how.

Let's dig in. I need to trace the call stack to understand how we end up at that warning. The user helpfully gave me the path: `ieee80211_tdls_add_setup_cfm_ies` (inline) -> `ieee80211_tdls_add_ies` (inline) -> `ieee80211_tdls_build_mgmt_packet_data`. So, my focus should be on how `ieee80211_tdls_build_mgmt_packet_data` is called. It's the starting point of the chain.

First, let's just make sure I have a good understanding of what the code is doing at `net/mac80211/tdls.c:611`. 

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_setup_cfm_ies]

map[SourceCode: 591:	static void
 592:	ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
 593:					 struct sk_buff *skb, const u8 *peer,
 594:					 bool initiator, const u8 *extra_ies,
 595:					 size_t extra_ies_len)
 596:	{
 597:		struct ieee80211_sub_if_data *sdata = link->sdata;
 598:		struct ieee80211_local *local = sdata->local;
 599:		size_t offset = 0, noffset;
 600:		struct sta_info *sta, *ap_sta;
 601:		struct ieee80211_supported_band *sband;
 602:		u8 *pos;
 603:	
 604:		sband = ieee80211_get_link_sband(link);
 605:		if (WARN_ON_ONCE(!sband))
 606:			return;
 607:	
 608:		sta = sta_info_get(sdata, peer);
 609:		ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
 610:	
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
 612:			return;
 613:	
 614:		sta->tdls_chandef = link->conf->chanreq.oper;
 615:	
 616:		/* add any custom IEs that go before the QoS IE */
 617:		if (extra_ies_len) {
 618:			static const u8 before_qos[] = {
 619:				WLAN_EID_RSN,
 620:			};
 621:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 622:						     before_qos,
 623:						     ARRAY_SIZE(before_qos),
 624:						     offset);
 625:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 626:			offset = noffset;
 627:		}
 628:	
 629:		/* add the QoS param IE if both the peer and we support it */
 630:		if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
 631:			ieee80211_tdls_add_wmm_param_ie(sdata, skb);
 632:	
 633:		/* add any custom IEs that go before HT operation */
 634:		if (extra_ies_len) {
 635:			static const u8 before_ht_op[] = {
 636:				WLAN_EID_RSN,
 637:				WLAN_EID_QOS_CAPA,
 638:				WLAN_EID_FAST_BSS_TRANSITION,
 639:				WLAN_EID_TIMEOUT_INTERVAL,
 640:			};
 641:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 642:						     before_ht_op,
 643:						     ARRAY_SIZE(before_ht_op),
 644:						     offset);
 645:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 646:			offset = noffset;
 647:		}
 648:	
 649:		/*
 650:		 * if HT support is only added in TDLS, we need an HT-operation IE.
 651:		 * add the IE as required by IEEE802.11-2012 9.23.3.2.
 652:		 */
 653:		if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
 654:			u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
 655:				   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
 656:				   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
 657:	
 658:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
 659:			ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
 660:						   &link->conf->chanreq.oper, prot,
 661:						   true);
 662:		}
 663:	
 664:		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 665:	
 666:		/* only include VHT-operation if not on the 2.4GHz band */
 667:		if (sband->band != NL80211_BAND_2GHZ &&
 668:		    sta->sta.deflink.vht_cap.vht_supported) {
 669:			/*
 670:			 * if both peers support WIDER_BW, we can expand the chandef to
 671:			 * a wider compatible one, up to 80MHz
 672:			 */
 673:			if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 674:				ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 675:	
 676:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
 677:			ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
 678:						    &sta->tdls_chandef);
 679:		}
 680:	
 681:		/* add any remaining IEs */
 682:		if (extra_ies_len) {
 683:			noffset = extra_ies_len;
 684:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 685:		}
 686:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 6010
							output: 56
							thoughts: 141
						

**Analyzing a Potential TDLS Vulnerability**

Okay, so I'm looking at this code and I've hit a warning, and it's flagged right here on line 611: `if (WARN_ON_ONCE(!sta || !ap_sta))`. My immediate concern is the null pointer dereference potential here. I see that `sta` is pulled from `sta_info_get(sdata, peer)`. This looks like it retrieves station information based on the `peer` address. Then, `ap_sta` gets its data from `sta_info_get(sdata, sdata->vif.cfg.ap_addr)`. This, in turn, seems to retrieve station information for the access point.

The warning is triggered if *either* `sta` or `ap_sta` is null. Given the context, this indicates a problem with the station or AP's presence or configuration, and this means we can't safely proceed with whatever operation is happening. It's a critical safety check.

Now, I'm digging deeper because I see that `ieee80211_tdls_add_setup_cfm_ies` is called from `ieee80211_tdls_add_ies`, which suggests we're dealing with TDLS (Tunneled Direct Link Setup) IEs (Information Elements). That's the likely root cause. The real question is *why* one of these pointers could be null, and what that means for TDLS setup. Let's trace back from `ieee80211_tdls_add_ies` to understand exactly the environment in which the check is made. This should give me the crucial context I need to evaluate the risk and determine the root cause of this possible vulnerability.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_ies]

map[SourceCode: 741:	static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
 742:					   struct sk_buff *skb, const u8 *peer,
 743:					   u8 action_code, u16 status_code,
 744:					   bool initiator, const u8 *extra_ies,
 745:					   size_t extra_ies_len, u8 oper_class,
 746:					   struct cfg80211_chan_def *chandef)
 747:	{
 748:		switch (action_code) {
 749:		case WLAN_TDLS_SETUP_REQUEST:
 750:		case WLAN_TDLS_SETUP_RESPONSE:
 751:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 752:			if (status_code == 0)
 753:				ieee80211_tdls_add_setup_start_ies(link,
 754:								   skb, peer,
 755:								   action_code,
 756:								   initiator,
 757:								   extra_ies,
 758:								   extra_ies_len);
 759:			break;
 760:		case WLAN_TDLS_SETUP_CONFIRM:
 761:			if (status_code == 0)
 762:				ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
 763:								 initiator, extra_ies,
 764:								 extra_ies_len);
 765:			break;
 766:		case WLAN_TDLS_TEARDOWN:
 767:		case WLAN_TDLS_DISCOVERY_REQUEST:
 768:			if (extra_ies_len)
 769:				skb_put_data(skb, extra_ies, extra_ies_len);
 770:			if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
 771:				ieee80211_tdls_add_link_ie(link, skb,
 772:							   peer, initiator);
 773:			break;
 774:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 775:			ieee80211_tdls_add_chan_switch_req_ies(link, skb, peer,
 776:							       initiator, extra_ies,
 777:							       extra_ies_len,
 778:							       oper_class, chandef);
 779:			break;
 780:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 781:			ieee80211_tdls_add_chan_switch_resp_ies(link, skb, peer,
 782:								status_code,
 783:								initiator, extra_ies,
 784:								extra_ies_len);
 785:			break;
 786:		}
 787:	
 788:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 7457
							output: 60
							thoughts: 40
						

Okay, here's my interpretation of those thoughts, summarized from my perspective as an expert in the field:

**Internal Code Flow and Contextualization of IEEE802.11 TDLS**

Alright, so I'm looking at this code, and it's clear the function `ieee80211_tdls_add_ies` is being invoked, and a key point jumps out: it's being called specifically from `ieee80211_tdls_build_mgmt_packet_data`. This immediately tells me we're within the process of *constructing* a management frame, specifically for a TDLS (Tunneled Direct Link Setup) operation.

That's critical context. I know this means we're in the phase of assembling the information elements (IEs) that will be packed into a TDLS management frame. Considering my experience with 802.11, I'd say the frame being built would be one of the critical frames for initiating or managing a direct link, either during setup, a discovery, or related tasks.

The fact that `ieee80211_tdls_add_ies` is involved confirms that we're dealing with the information exchange that TDLS relies on to establish or maintain a direct link between two stations. I'm already thinking about what IEs are *likely* being added, based on where we are in the flow: TDLS capabilities, perhaps, or direct-link setup requests or confirmations. The particular function's name suggests it's the right piece of logic that inserts the necessary TDLS-specific data. It’s also interesting to dig into what's happening just before, and after, the function call to have a complete view of the TDLS operations. This information is vital for understanding, optimizing, or debugging TDLS implementation.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_build_mgmt_packet_data]

map[SourceCode: 908:	static struct sk_buff *
 909:	ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 910:					      const u8 *peer, int link_id,
 911:					      u8 action_code, u8 dialog_token,
 912:					      u16 status_code, bool initiator,
 913:					      const u8 *extra_ies, size_t extra_ies_len,
 914:					      u8 oper_class,
 915:					      struct cfg80211_chan_def *chandef)
 916:	{
 917:		struct ieee80211_local *local = sdata->local;
 918:		struct sk_buff *skb;
 919:		int ret;
 920:		struct ieee80211_link_data *link;
 921:	
 922:		link_id = link_id >= 0 ? link_id : 0;
 923:		rcu_read_lock();
 924:		link = rcu_dereference(sdata->link[link_id]);
 925:		if (WARN_ON(!link))
 926:			goto unlock;
 927:	
 928:		skb = netdev_alloc_skb(sdata->dev,
 929:				       local->hw.extra_tx_headroom +
 930:				       max(sizeof(struct ieee80211_mgmt),
 931:					   sizeof(struct ieee80211_tdls_data)) +
 932:				       50 + /* supported rates */
 933:				       10 + /* ext capab */
 934:				       26 + /* max(WMM-info, WMM-param) */
 935:				       2 + max(sizeof(struct ieee80211_ht_cap),
 936:					       sizeof(struct ieee80211_ht_operation)) +
 937:				       2 + max(sizeof(struct ieee80211_vht_cap),
 938:					       sizeof(struct ieee80211_vht_operation)) +
 939:				       2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
 940:					       sizeof(struct ieee80211_he_mcs_nss_supp) +
 941:					       IEEE80211_HE_PPE_THRES_MAX_LEN +
 942:				       2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
 943:				       2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
 944:					       sizeof(struct ieee80211_eht_mcs_nss_supp) +
 945:					       IEEE80211_EHT_PPE_THRES_MAX_LEN +
 946:				       50 + /* supported channels */
 947:				       3 + /* 40/20 BSS coex */
 948:				       4 + /* AID */
 949:				       4 + /* oper classes */
 950:				       extra_ies_len +
 951:				       sizeof(struct ieee80211_tdls_lnkie));
 952:		if (!skb)
 953:			goto unlock;
 954:	
 955:		skb_reserve(skb, local->hw.extra_tx_headroom);
 956:	
 957:		switch (action_code) {
 958:		case WLAN_TDLS_SETUP_REQUEST:
 959:		case WLAN_TDLS_SETUP_RESPONSE:
 960:		case WLAN_TDLS_SETUP_CONFIRM:
 961:		case WLAN_TDLS_TEARDOWN:
 962:		case WLAN_TDLS_DISCOVERY_REQUEST:
 963:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 964:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 965:			ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
 966:							     sdata->dev, link, peer,
 967:							     action_code, dialog_token,
 968:							     status_code, skb);
 969:			break;
 970:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 971:			ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
 972:							 peer, link, action_code,
 973:							 dialog_token, status_code,
 974:							 skb);
 975:			break;
 976:		default:
 977:			ret = -EOPNOTSUPP;
 978:			break;
 979:		}
 980:	
 981:		if (ret < 0)
 982:			goto fail;
 983:	
 984:		ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
 985:				       initiator, extra_ies, extra_ies_len, oper_class,
 986:				       chandef);
 987:		rcu_read_unlock();
 988:		return skb;
 989:	
 990:	fail:
 991:		dev_kfree_skb(skb);
 992:	unlock:
 993:		rcu_read_unlock();
 994:		return NULL;
 995:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 9557
							output: 54
							thoughts: 56
						

Here's my summary, as the thought process unfolds:

**Digging into TDLS Management Frame Construction**

Okay, so I see `ieee80211_tdls_build_mgmt_packet_data` is being called from within `ieee80211_tdls_mgmt`. That makes sense; it's likely building the data portion of the management frame for TDLS operations. Now, the next logical step is to dive into `ieee80211_tdls_mgmt` itself. I need to understand the control flow and how that data packet building function fits into the bigger picture of the TDLS management frame processing. Let's see what's going on in that function. It's time to trace the execution and see how this all hangs together.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_mgmt]

map[SourceCode:1255:	int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
1256:				const u8 *peer, int link_id,
1257:				u8 action_code, u8 dialog_token, u16 status_code,
1258:				u32 peer_capability, bool initiator,
1259:				const u8 *extra_ies, size_t extra_ies_len)
1260:	{
1261:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1262:		int ret;
1263:	
1264:		if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
1265:			return -EOPNOTSUPP;
1266:	
1267:		/* make sure we are in managed mode, and associated */
1268:		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1269:		    !sdata->u.mgd.associated)
1270:			return -EINVAL;
1271:	
1272:		switch (action_code) {
1273:		case WLAN_TDLS_SETUP_REQUEST:
1274:		case WLAN_TDLS_SETUP_RESPONSE:
1275:			ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
1276:							link_id, action_code,
1277:							dialog_token, status_code,
1278:							peer_capability, initiator,
1279:							extra_ies, extra_ies_len);
1280:			break;
1281:		case WLAN_TDLS_TEARDOWN:
1282:			ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
1283:							   action_code, dialog_token,
1284:							   status_code,
1285:							   peer_capability, initiator,
1286:							   extra_ies, extra_ies_len);
1287:			break;
1288:		case WLAN_TDLS_DISCOVERY_REQUEST:
1289:			/*
1290:			 * Protect the discovery so we can hear the TDLS discovery
1291:			 * response frame. It is transmitted directly and not buffered
1292:			 * by the AP.
1293:			 */
1294:			drv_mgd_protect_tdls_discover(sdata->local, sdata, link_id);
1295:			fallthrough;
1296:		case WLAN_TDLS_SETUP_CONFIRM:
1297:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1298:			/* no special handling */
1299:			ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
1300:							      link_id, action_code,
1301:							      dialog_token,
1302:							      status_code,
1303:							      peer_capability,
1304:							      initiator, extra_ies,
1305:							      extra_ies_len, 0, NULL);
1306:			break;
1307:		default:
1308:			ret = -EOPNOTSUPP;
1309:			break;
1310:		}
1311:	
1312:		tdls_dbg(sdata, "TDLS mgmt action %d peer %pM link_id %d status %d\n",
1313:			 action_code, peer, link_id, ret);
1314:		return ret;
1315:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 10895
							output: 58
							thoughts: 91
						

Okay, here's my take on those thoughts, framed from an expert's perspective:

**Diving into TDLS Management**

Right, so `ieee80211_tdls_mgmt`, that's the starting point for handling `NL80211_CMD_TDLS_MGMT` commands. That makes sense; it's the obvious entry point. The interesting bit is what comes next: it calls `ieee80211_tdls_prep_mgmt_packet` specifically when dealing with a `WLAN_TDLS_SETUP_CONFIRM`.

Okay, so a confirmation requires *packet preparation*. My intuition tells me that means we're probably crafting the specific IEEE 802.11 management frame content needed for the setup confirmation. I'm going to have to dive into `ieee80211_tdls_prep_mgmt_packet` to see how it works to get a clearer picture of how this TDLS confirmation is constructed.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_prep_mgmt_packet]

map[SourceCode: 997:	static int
 998:	ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 999:					const u8 *peer, int link_id,
1000:					u8 action_code, u8 dialog_token,
1001:					u16 status_code, u32 peer_capability,
1002:					bool initiator, const u8 *extra_ies,
1003:					size_t extra_ies_len, u8 oper_class,
1004:					struct cfg80211_chan_def *chandef)
1005:	{
1006:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007:		struct sk_buff *skb = NULL;
1008:		struct sta_info *sta;
1009:		u32 flags = 0;
1010:		int ret = 0;
1011:	
1012:		rcu_read_lock();
1013:		sta = sta_info_get(sdata, peer);
1014:	
1015:		/* infer the initiator if we can, to support old userspace */
1016:		switch (action_code) {
1017:		case WLAN_TDLS_SETUP_REQUEST:
1018:			if (sta) {
1019:				set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
1020:				sta->sta.tdls_initiator = false;
1021:			}
1022:			fallthrough;
1023:		case WLAN_TDLS_SETUP_CONFIRM:
1024:		case WLAN_TDLS_DISCOVERY_REQUEST:
1025:			initiator = true;
1026:			break;
1027:		case WLAN_TDLS_SETUP_RESPONSE:
1028:			/*
1029:			 * In some testing scenarios, we send a request and response.
1030:			 * Make the last packet sent take effect for the initiator
1031:			 * value.
1032:			 */
1033:			if (sta) {
1034:				clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
1035:				sta->sta.tdls_initiator = true;
1036:			}
1037:			fallthrough;
1038:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1039:			initiator = false;
1040:			break;
1041:		case WLAN_TDLS_TEARDOWN:
1042:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
1043:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
1044:			/* any value is ok */
1045:			break;
1046:		default:
1047:			ret = -EOPNOTSUPP;
1048:			break;
1049:		}
1050:	
1051:		if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
1052:			initiator = true;
1053:	
1054:		rcu_read_unlock();
1055:		if (ret < 0)
1056:			goto fail;
1057:	
1058:		skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
1059:							    link_id, action_code,
1060:							    dialog_token, status_code,
1061:							    initiator, extra_ies,
1062:							    extra_ies_len, oper_class,
1063:							    chandef);
1064:		if (!skb) {
1065:			ret = -EINVAL;
1066:			goto fail;
1067:		}
1068:	
1069:		if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
1070:			ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
1071:			return 0;
1072:		}
1073:	
1074:		/*
1075:		 * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
1076:		 * we should default to AC_VI.
1077:		 */
1078:		switch (action_code) {
1079:		case WLAN_TDLS_SETUP_REQUEST:
1080:		case WLAN_TDLS_SETUP_RESPONSE:
1081:			skb->priority = 256 + 2;
1082:			break;
1083:		default:
1084:			skb->priority = 256 + 5;
1085:			break;
1086:		}
1087:	
1088:		/*
1089:		 * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress.
1090:		 * Later, if no ACK is returned from peer, we will re-send the teardown
1091:		 * packet through the AP.
1092:		 */
1093:		if ((action_code == WLAN_TDLS_TEARDOWN) &&
1094:		    ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
1095:			bool try_resend; /* Should we keep skb for possible resend */
1096:	
1097:			/* If not sending directly to peer - no point in keeping skb */
1098:			rcu_read_lock();
1099:			sta = sta_info_get(sdata, peer);
1100:			try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
1101:			rcu_read_unlock();
1102:	
1103:			spin_lock_bh(&sdata->u.mgd.teardown_lock);
1104:			if (try_resend && !sdata->u.mgd.teardown_skb) {
1105:				/* Mark it as requiring TX status callback  */
1106:				flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1107:					 IEEE80211_TX_INTFL_MLME_CONN_TX;
1108:	
1109:				/*
1110:				 * skb is copied since mac80211 will later set
1111:				 * properties that might not be the same as the AP,
1112:				 * such as encryption, QoS, addresses, etc.
1113:				 *
1114:				 * No problem if skb_copy() fails, so no need to check.
1115:				 */
1116:				sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC);
1117:				sdata->u.mgd.orig_teardown_skb = skb;
1118:			}
1119:			spin_unlock_bh(&sdata->u.mgd.teardown_lock);
1120:		}
1121:	
1122:		/* disable bottom halves when entering the Tx path */
1123:		local_bh_disable();
1124:		__ieee80211_subif_start_xmit(skb, dev, flags,
1125:					     IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
1126:		local_bh_enable();
1127:	
1128:		return ret;
1129:	
1130:	fail:
1131:		dev_kfree_skb(skb);
1132:		return ret;
1133:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 13474
							output: 54
							thoughts: 512
						

**Analyzing a Potential NULL Pointer Dereference in TDLS Management**

Okay, so I'm looking at this `WARN_ON_ONCE` in `ieee80211_tdls_add_setup_cfm_ies`. It's getting tripped when either `sta` or `ap_sta` is NULL. I know that `sta` comes from `sta_info_get(sdata, peer)` and `ap_sta` comes from `sta_info_get(sdata, sdata->vif.cfg.ap_addr)`. The core of my concern revolves around how these `sta_info_get` calls can result in a NULL return, and what happens as a consequence.

I'm thinking about the conditions where `ap_sta` could be NULL. In `ieee80211_tdls_mgmt`, we have a check: if the interface isn't a station or isn't associated, we bail out. If we *are* associated, then `sdata->vif.cfg.ap_addr` should contain the AP's MAC address, and `sta_info_get` *should* return the corresponding `sta_info`. But, I'm already skeptical; is it actually possible that `associated` is true, but the `sta_info` for the AP isn't present for some transient reason? It's not the most likely scenario, but it's something I need to keep in the back of my head.

The more pressing concern is `sta = sta_info_get(sdata, peer)`. This is where the TDLS peer's station info is retrieved. If the peer isn't known, this returns NULL. I see that this `sta_info_get` call is performed earlier in the flow, in `ieee80211_tdls_prep_mgmt_packet` at line 1013, before `ieee80211_tdls_build_mgmt_packet_data`. That's where things get interesting because even if `sta` is NULL, the code *still* proceeds. This is a potential NULL pointer dereference, a classic vulnerability.

But this brings me to the core question: can this be triggered remotely? I've traced this path so far from the `NL80211_CMD_TDLS_MGMT` command. That's a local command from userspace. The question now is: can a remote attacker cause this `sta` to be NULL by sending a TDLS management frame over the air?

If a remote TDLS frame is received, it will be handled by `ieee80211_rx_tdls`. I need to track this function and see how it interacts with the station information and the handling of the frame content. It's time to find that function and trace the data flows to look for vulnerability.

requested entity does not exist

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_rx_tdls]

map[SourceCode: SourceFile:]

gemini-3-flash-preview

							input: 14684
							output: 23
							thoughts: 29
						

Here's my thought process, as if I were thinking it:

**Investigating a Potentially Misnamed Functionality**

Okay, so I'm trying to find something related to "tdls" in the codebase, but I'm not immediately seeing it named that way. My first instinct is, it's probably using a different, more standard term. Let me quickly broaden my search. Instead of digging through documentation just yet, I'll go straight to the source. Since this is likely related to wireless networking, and a cursory understanding makes me believe this belongs in the mac80211 stack, I'll use `grep` to quickly scan the `net/mac80211/` directory for any occurrences of "tdls." That should be a good starting point to identify alternative naming conventions or related functions. This is a common debugging technique to quickly identify a module by name.

map[Expression:tdls_rx|rx_tdls]

map[Output:drivers/net/wireless/intel/iwlwifi/mvm/mvm.h=2383=void iwl_mvm_tdls_cancel_channel_switch(struct ieee80211_hw *hw,
--
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h-2385-					struct ieee80211_sta *sta);
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h:2386:void iwl_mvm_rx_tdls_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb);
drivers/net/wireless/intel/iwlwifi/mvm/mvm.h-2387-void iwl_mvm_tdls_ch_switch_work(struct work_struct *work);
--
drivers/net/wireless/intel/iwlwifi/mvm/ops.c=317=static const struct iwl_rx_handlers iwl_mvm_rx_handlers[] = {
--
drivers/net/wireless/intel/iwlwifi/mvm/ops.c-400-
drivers/net/wireless/intel/iwlwifi/mvm/ops.c:401:	RX_HANDLER(TDLS_CHANNEL_SWITCH_NOTIFICATION, iwl_mvm_rx_tdls_notif,
drivers/net/wireless/intel/iwlwifi/mvm/ops.c-402-		   RX_HANDLER_ASYNC_LOCKED,
--
drivers/net/wireless/intel/iwlwifi/mvm/tdls.c=183=static void iwl_mvm_tdls_update_cs_state(struct iwl_mvm *mvm,
--
drivers/net/wireless/intel/iwlwifi/mvm/tdls.c-201-
drivers/net/wireless/intel/iwlwifi/mvm/tdls.c:202:void iwl_mvm_rx_tdls_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
drivers/net/wireless/intel/iwlwifi/mvm/tdls.c-203-{
]

gemini-3-flash-preview

							input: 15478
							output: 27
							thoughts: 96
						

**My Investigation of TDLS Frame Reception in mac80211**

Okay, so I need to track down how mac80211 processes received TDLS frames. My initial instinct is that, since TDLS frames are *usually* Action frames, the receive path in `net/mac80211/rx.c` or a similarly named file would be a good place to start digging. However, a quick reminder from memory suggests that TDLS frames can also be encapsulated within data frames, specifically using EtherType 0x890d. This means I need to broaden my search.

Therefore, rather than getting too hung up on specific action frame handling, I'll bypass the action frame route for now. It's more efficient to search directly for the EtherType value, `0x890d`, or the associated kernel constant, `ETH_P_TDLS`, within the mac80211 code base. That should quickly illuminate the primary entry points for TDLS frame processing, regardless of their encapsulation. That approach will pinpoint the most likely code responsible for handling this traffic.

map[Expression:ETH_P_TDLS|0x890d]

map[Output:drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h=28=static const u32 a6xx_ps_cluster_rbp[] = {
drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h:29:	0x88f0, 0x88f3, 0x890d, 0x890e, 0x8927, 0x8928, 0x8bf0, 0x8bf1,
drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h-30-	0x8c02, 0x8c07, 0x8c11, 0x8c16, 0x8c20, 0x8c25,
--
drivers/net/wireless/intel/iwlwifi/mld/rx.c=1544=static int iwl_mld_build_rx_skb(struct iwl_mld *mld, struct sk_buff *skb,
--
drivers/net/wireless/intel/iwlwifi/mld/rx.c-1612-			      shdr->type != htons(ETH_P_PAE) &&
drivers/net/wireless/intel/iwlwifi/mld/rx.c:1613:			      shdr->type != htons(ETH_P_TDLS))))
drivers/net/wireless/intel/iwlwifi/mld/rx.c-1614-			skb->ip_summed = CHECKSUM_NONE;
--
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c=91=static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
--
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c-171-			      shdr->type != htons(ETH_P_PAE) &&
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c:172:			      shdr->type != htons(ETH_P_TDLS))))
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c-173-			skb->ip_summed = CHECKSUM_NONE;
--
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c=20=static int mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c-43-			if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c:44:			    ntohs(rx_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c-45-				mwifiex_process_tdls_action_frame(priv,
--
drivers/net/wireless/marvell/mwifiex/main.c=770=mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/main.c-778-	     ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/main.c:779:	     (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
drivers/net/wireless/marvell/mwifiex/main.c-780-		mwifiex_dbg(priv->adapter, DATA,
--
drivers/net/wireless/marvell/mwifiex/sta_rx.c=71=int mwifiex_process_rx_packet(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/sta_rx.c-148-	if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/sta_rx.c:149:	    ntohs(rx_pkt_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
drivers/net/wireless/marvell/mwifiex/sta_rx.c-150-		offset = (u8 *)local_rx_pd + rx_pkt_off;
--
drivers/net/wireless/marvell/mwifiex/tdls.c=464=static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-479-	memcpy(tf->sa, priv->curr_addr, ETH_ALEN);
drivers/net/wireless/marvell/mwifiex/tdls.c:480:	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
drivers/net/wireless/marvell/mwifiex/tdls.c-481-	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
--
drivers/net/wireless/marvell/mwifiex/wmm.c=808=mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/wmm.c-823-	    ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) {
drivers/net/wireless/marvell/mwifiex/wmm.c:824:		if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS)
drivers/net/wireless/marvell/mwifiex/wmm.c-825-			mwifiex_dbg(adapter, DATA,
--
include/linux/ieee80211.h=2579=static inline int ieee80211_get_tdls_action(struct sk_buff *skb)
--
include/linux/ieee80211.h-2585-
include/linux/ieee80211.h:2586:		if (get_unaligned_be16(tdls_data) == ETH_P_TDLS &&
include/linux/ieee80211.h-2587-		    tdls_data[2] == WLAN_TDLS_SNAP_RFTYPE &&
--
include/uapi/linux/if_ether.h-110-#define ETH_P_IBOE	0x8915		/* Infiniband over Ethernet	*/
include/uapi/linux/if_ether.h:111:#define ETH_P_TDLS	0x890D          /* TDLS */
include/uapi/linux/if_ether.h-112-#define ETH_P_FIP	0x8914		/* FCoE Initialization Protocol */
--
net/mac80211/iface.c=1779=static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
--
net/mac80211/iface.c-1798-
net/mac80211/iface.c:1799:		if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
net/mac80211/iface.c-1800-			ieee80211_process_tdls_channel_switch(sdata, skb);
--
net/mac80211/rx.c=3262=ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
--
net/mac80211/rx.c-3301-	if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
net/mac80211/rx.c:3302:						cpu_to_be16(ETH_P_TDLS))) {
net/mac80211/rx.c-3303-		struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
--
net/mac80211/rx.c-3310-		     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
net/mac80211/rx.c:3311:			rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
net/mac80211/rx.c-3312-			__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
--
net/mac80211/rx.c=4925=static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
--
net/mac80211/rx.c-5007-		 */
net/mac80211/rx.c:5008:		if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||
net/mac80211/rx.c-5009-			     payload->proto == fast_rx->control_port_protocol))
--
net/mac80211/tdls.c=791=ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-802-	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
net/mac80211/tdls.c:803:	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
net/mac80211/tdls.c-804-	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
--
net/mac80211/tx.c=2470=static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
--
net/mac80211/tx.c-2473-
net/mac80211/tx.c:2474:	return ethertype == ETH_P_TDLS &&
net/mac80211/tx.c-2475-	       skb->len > 14 &&
]

gemini-3-flash-preview

							input: 18543
							output: 54
							thoughts: 124
						

Okay, here's my interpretation of what's going on, thinking it through from a debugging perspective within that specific code context:

**Analyzing TDLS Frame Handling in mac80211 RX Path**

Alright, I'm digging into `net/mac80211/rx.c`. I'm focusing on the `ieee80211_rx_h_data` function, specifically around line 3301. I see this conditional check: `if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto == cpu_to_be16(ETH_P_TDLS)))`. That's the key. What this is doing is checking if the Ethernet protocol type (`h_proto`) of an incoming frame is equal to `ETH_P_TDLS`. This, of course, is a quick check to see if we have received a Tunneled Direct Link Setup frame.

The use of `unlikely()` is a micro-optimization – the assumption is that TDLS frames aren't the norm, so the compiler can optimize the common path (the "not TDLS" case). The `cpu_to_be16()` call is vital because it's ensuring that we're comparing the protocol type in network byte order (big-endian), which is the standard for Ethernet headers, to avoid any endianness problems on different CPU architectures. So this conditional is effectively the first filter to identify a TDLS frame upon reception. Now, I want to investigate how the system handles the TDLS frame itself, knowing this is the entry point, or at least a very early one, to this logic, so I'll need to look at what happens _after_ this conditional is met. Where is that frame then handed off?

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_h_data]

map[SourceCode:3261:	static ieee80211_rx_result debug_noinline
3262:	ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
3263:	{
3264:		struct ieee80211_sub_if_data *sdata = rx->sdata;
3265:		struct ieee80211_local *local = rx->local;
3266:		struct net_device *dev = sdata->dev;
3267:		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
3268:		__le16 fc = hdr->frame_control;
3269:		ieee80211_rx_result res;
3270:		bool port_control;
3271:	
3272:		if (unlikely(!ieee80211_is_data(hdr->frame_control)))
3273:			return RX_CONTINUE;
3274:	
3275:		if (unlikely(!ieee80211_is_data_present(hdr->frame_control)))
3276:			return RX_DROP_U_NULL_DATA;
3277:	
3278:		/* Send unexpected-4addr-frame event to hostapd */
3279:		if (ieee80211_has_a4(hdr->frame_control) &&
3280:		    sdata->vif.type == NL80211_IFTYPE_AP) {
3281:			if (rx->sta &&
3282:			    !test_and_set_sta_flag(rx->sta, WLAN_STA_4ADDR_EVENT))
3283:				cfg80211_rx_unexpected_4addr_frame(
3284:					rx->sdata->dev, rx->sta->sta.addr, rx->link_id,
3285:					GFP_ATOMIC);
3286:			return RX_DROP_U_UNEXPECTED_4ADDR;
3287:		}
3288:	
3289:		res = __ieee80211_data_to_8023(rx, &port_control);
3290:		if (unlikely(res != RX_CONTINUE))
3291:			return res;
3292:	
3293:		res = ieee80211_rx_mesh_data(rx->sdata, rx->sta, rx->skb);
3294:		if (res != RX_CONTINUE)
3295:			return res;
3296:	
3297:		if (!ieee80211_frame_allowed(rx, fc))
3298:			return RX_DROP_U_PORT_CONTROL;
3299:	
3300:		/* directly handle TDLS channel switch requests/responses */
3301:		if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
3302:							cpu_to_be16(ETH_P_TDLS))) {
3303:			struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
3304:	
3305:			if (pskb_may_pull(rx->skb,
3306:					  offsetof(struct ieee80211_tdls_data, u)) &&
3307:			    tf->payload_type == WLAN_TDLS_SNAP_RFTYPE &&
3308:			    tf->category == WLAN_CATEGORY_TDLS &&
3309:			    (tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_REQUEST ||
3310:			     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
3311:				rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
3312:				__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
3313:							       rx->sta, rx->skb);
3314:				return RX_QUEUED;
3315:			}
3316:		}
3317:	
3318:		if (rx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
3319:		    unlikely(port_control) && sdata->bss) {
3320:			sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
3321:					     u.ap);
3322:			dev = sdata->dev;
3323:			rx->sdata = sdata;
3324:		}
3325:	
3326:		rx->skb->dev = dev;
3327:	
3328:		if (!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
3329:		    local->ps_sdata && local->hw.conf.dynamic_ps_timeout > 0 &&
3330:		    !is_multicast_ether_addr(
3331:			    ((struct ethhdr *)rx->skb->data)->h_dest) &&
3332:		    (!local->scanning &&
3333:		     !test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)))
3334:			mod_timer(&local->dynamic_ps_timer, jiffies +
3335:				  msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
3336:	
3337:		ieee80211_deliver_skb(rx);
3338:	
3339:		return RX_QUEUED;
3340:	}
 SourceFile:net/mac80211/rx.c]

gemini-3-flash-preview

							input: 20684
							output: 56
							thoughts: 872
						

**Analyzing the TDLS Setup Confirm Warning**

Okay, let's break this down. My initial thought was about how TDLS frames are handled in the kernel. `ieee80211_rx_h_data` deals with TDLS channel switch frames differently, queuing them specifically, but other TDLS frames use `ieee80211_deliver_skb`, which then passes them to the network stack via `netif_rx` (or similar). The network stack, in turn, is expected to deliver it to whatever socket is listening for `ETH_P_TDLS`. But, wait, aren’t TDLS frames typically handled by `wpa_supplicant` in userspace, via its socket for `ETH_P_TDLS`?

So, `wpa_supplicant` is supposed to process these frames. When it *wants* to send one, it uses `NL80211_CMD_TDLS_MGMT`. The warning I'm focused on is in `ieee80211_tdls_add_setup_cfm_ies`, which is triggered when *sending* a TDLS Setup Confirm. This is called from the kernel when the kernel is asked to send the frame via `NL80211_CMD_TDLS_MGMT` from userspace.

If an attacker sends a TDLS frame, it will get passed to userspace, but not directly trigger the warning. However, if an attacker sends a TDLS Setup Response, `wpa_supplicant` *might* respond with a Setup Confirm, which will then use `NL80211_CMD_TDLS_MGMT` to trigger the warning.

The real question is: Can an attacker trigger this *without* the cooperation of userspace? If `wpa_supplicant` is running and TDLS is enabled, it might automatically respond to TDLS frames. That's the crux of the problem.

Now, let's figure out what triggers the `WARN_ON_ONCE` in `ieee80211_tdls_add_setup_cfm_ies`. Looking at the code:

```c
 608:		sta = sta_info_get(sdata, peer);
 609:		ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
 610:	
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
 612:			return;
```

It's clear that the warning occurs if either `sta` or `ap_sta` is NULL. If `sta` is NULL, that means there’s no `sta_info` for the `peer` MAC address. Let's see what calls `ieee80211_tdls_add_setup_cfm_ies`. In `ieee80211_tdls_mgmt` it calls `ieee80211_tdls_prep_mgmt_packet` and then within that:

```c
1013:		sta = sta_info_get(sdata, peer);
...
1058:		skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
...
```

The thing that stands out is that it doesn't check if `sta` is NULL before passing it as an argument.

So, if userspace sends `NL80211_CMD_TDLS_MGMT` with a `peer` MAC address that doesn't have a `sta_info` entry in the kernel, `sta` *will* be NULL. The question then becomes: when is a `sta_info` created for a TDLS peer? My guess is usually when the TDLS setup starts. To be precise, I need to investigate the `ieee80211_tdls_mgmt_setup` function for the proper timing and preconditions.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_mgmt_setup]

map[SourceCode:1135:	static int
1136:	ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
1137:				  const u8 *peer, int link_id,
1138:				  u8 action_code, u8 dialog_token,
1139:				  u16 status_code, u32 peer_capability, bool initiator,
1140:				  const u8 *extra_ies, size_t extra_ies_len)
1141:	{
1142:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1143:		struct ieee80211_local *local = sdata->local;
1144:		enum ieee80211_smps_mode smps_mode =
1145:			sdata->deflink.u.mgd.driver_smps_mode;
1146:		int ret;
1147:	
1148:		/* don't support setup with forced SMPS mode that's not off */
1149:		if (smps_mode != IEEE80211_SMPS_AUTOMATIC &&
1150:		    smps_mode != IEEE80211_SMPS_OFF) {
1151:			tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n",
1152:				 smps_mode);
1153:			return -EOPNOTSUPP;
1154:		}
1155:	
1156:		lockdep_assert_wiphy(local->hw.wiphy);
1157:	
1158:		/* we don't support concurrent TDLS peer setups */
1159:		if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) &&
1160:		    !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
1161:			ret = -EBUSY;
1162:			goto out_unlock;
1163:		}
1164:	
1165:		/*
1166:		 * make sure we have a STA representing the peer so we drop or buffer
1167:		 * non-TDLS-setup frames to the peer. We can't send other packets
1168:		 * during setup through the AP path.
1169:		 * Allow error packets to be sent - sometimes we don't even add a STA
1170:		 * before failing the setup.
1171:		 */
1172:		if (status_code == 0) {
1173:			rcu_read_lock();
1174:			if (!sta_info_get(sdata, peer)) {
1175:				rcu_read_unlock();
1176:				ret = -ENOLINK;
1177:				goto out_unlock;
1178:			}
1179:			rcu_read_unlock();
1180:		}
1181:	
1182:		ieee80211_flush_queues(local, sdata, false);
1183:		memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN);
1184:	
1185:		/* we cannot take the mutex while preparing the setup packet */
1186:		ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
1187:						      link_id, action_code,
1188:						      dialog_token, status_code,
1189:						      peer_capability, initiator,
1190:						      extra_ies, extra_ies_len, 0,
1191:						      NULL);
1192:		if (ret < 0) {
1193:			eth_zero_addr(sdata->u.mgd.tdls_peer);
1194:			return ret;
1195:		}
1196:	
1197:		wiphy_delayed_work_queue(sdata->local->hw.wiphy,
1198:					 &sdata->u.mgd.tdls_peer_del_work,
1199:					 TDLS_PEER_SETUP_TIMEOUT);
1200:		return 0;
1201:	
1202:	out_unlock:
1203:		return ret;
1204:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 23727
							output: 58
							thoughts: 734
						

**Analyzing the TDLS Setup Vulnerability**

Okay, let's break this down. My initial observation is a discrepancy in how the TDLS setup process handles station information (`sta_info`). For `WLAN_TDLS_SETUP_REQUEST` and `WLAN_TDLS_SETUP_RESPONSE`, the code checks for the existence of `sta_info` using `sta_info_get(sdata, peer)` before proceeding within `ieee80211_tdls_mgmt_setup`. However, with `WLAN_TDLS_SETUP_CONFIRM`, it directly calls `ieee80211_tdls_prep_mgmt_packet` through `ieee80211_tdls_mgmt` and *bypasses* that crucial `sta_info` check.

This suggests a potential vulnerability. If an attacker crafts a `NL80211_CMD_TDLS_MGMT` command with `action_code = WLAN_TDLS_SETUP_CONFIRM` and specifies a `peer` MAC address that doesn't have an associated `sta_info` entry in the kernel, we'll hit that warning, which isn't desirable.

Now, the question becomes, can a *remote* attacker exploit this?  Theoretically, yes. A remote attacker could send a rogue TDLS Setup Response to the victim's device. If the victim's `wpa_supplicant` is in a state where it's expecting a Setup Response, it might process it, subsequently sending a Setup Confirm. If, at that point, the kernel lacks the `sta_info` for the peer, the warning is triggered.

But... why would the kernel *lack* the `sta_info`? Usually, `wpa_supplicant` establishes the TDLS peer within the kernel by utilizing `NL80211_CMD_NEW_STATION`. So, an unsolicited Setup Response from an attacker might be ignored by `wpa_supplicant`. It has to be in the correct state to act on the Setup Response.

Ah, but the reproducer utilizes `NL80211_CMD_TDLS_MGMT` directly. This implies a local trigger. This negates the possibility of remote attack vector, and explains why the question was posed as "Can a remote attacker trigger this warning by sending a TDLS frame over the air?". 

Now, let's explore if TDLS frames over-the-air can lead to the vulnerable code path. The kernel receives the TDLS frame and then will hand the frame to `wpa_supplicant`. However, the kernel doesn't call `ieee80211_tdls_add_setup_cfm_ies` on the incoming frame, which is where the vulnerabilty is accessed. It only calls that function while *constructing* a frame to be sent.

Let's check the call sites for `ieee80211_tdls_add_setup_cfm_ies` and `ieee80211_tdls_add_ies` to understand how the vulnerable code is accessed. `ieee80211_tdls_add_ies` is called by two functions: `ieee80211_tdls_build_mgmt_packet_data`, which comes from `NL80211_CMD_TDLS_MGMT`, and...wait a minute...`ieee80211_process_tdls_channel_switch`. I seem to remember that one. I think this bears more investigation.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_process_tdls_channel_switch]

map[SourceCode:2005:	void
2006:	ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
2007:					      struct sk_buff *skb)
2008:	{
2009:		struct ieee80211_tdls_data *tf = (void *)skb->data;
2010:		struct wiphy *wiphy = sdata->local->hw.wiphy;
2011:	
2012:		lockdep_assert_wiphy(wiphy);
2013:	
2014:		/* make sure the driver supports it */
2015:		if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
2016:			return;
2017:	
2018:		/* we want to access the entire packet */
2019:		if (skb_linearize(skb))
2020:			return;
2021:		/*
2022:		 * The packet/size was already validated by mac80211 Rx path, only look
2023:		 * at the action type.
2024:		 */
2025:		switch (tf->action_code) {
2026:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
2027:			ieee80211_process_tdls_channel_switch_req(sdata, skb);
2028:			break;
2029:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
2030:			ieee80211_process_tdls_channel_switch_resp(sdata, skb);
2031:			break;
2032:		default:
2033:			WARN_ON_ONCE(1);
2034:			return;
2035:		}
2036:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 25833
							output: 60
							thoughts: 68
						

Okay, let's dive into this. Here's how I'm processing this information:

**Analyzing TDLS Channel Switch Request/Response**

Right, so we're looking at TDLS (Tunneled Direct Link Setup) channel switching. The core of this seems to be driven by two specific functions: `ieee80211_process_tdls_channel_switch_req` and `ieee80211_process_tdls_channel_switch_resp`. It makes sense; a request and a response, the standard handshake. My immediate focus, however, is on the response handling, so I'm going to jump into a deep dive of `ieee80211_process_tdls_channel_switch_resp`. Let's see how that one is handling things. That's where the interesting logic usually resides. I'm eager to see what data fields it checks, what state transitions it handles, and what decisions it makes based on the response's content.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_process_tdls_channel_switch_resp]

map[SourceCode:1745:	static int
1746:	ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata,
1747:						   struct sk_buff *skb)
1748:	{
1749:		struct ieee80211_local *local = sdata->local;
1750:		struct ieee802_11_elems *elems = NULL;
1751:		struct sta_info *sta;
1752:		struct ieee80211_tdls_data *tf = (void *)skb->data;
1753:		bool local_initiator;
1754:		struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1755:		int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable);
1756:		struct ieee80211_tdls_ch_sw_params params = {};
1757:		int ret;
1758:	
1759:		lockdep_assert_wiphy(local->hw.wiphy);
1760:	
1761:		params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
1762:		params.timestamp = rx_status->device_timestamp;
1763:	
1764:		if (skb->len < baselen) {
1765:			tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n",
1766:				 skb->len);
1767:			return -EINVAL;
1768:		}
1769:	
1770:		sta = sta_info_get(sdata, tf->sa);
1771:		if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) {
1772:			tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n",
1773:				 tf->sa);
1774:			ret = -EINVAL;
1775:			goto out;
1776:		}
1777:	
1778:		params.sta = &sta->sta;
1779:		params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code);
1780:		if (params.status != 0) {
1781:			ret = 0;
1782:			goto call_drv;
1783:		}
1784:	
1785:		elems = ieee802_11_parse_elems(tf->u.chan_switch_resp.variable,
1786:					       skb->len - baselen,
1787:					       IEEE80211_FTYPE_MGMT |
1788:					       IEEE80211_STYPE_ACTION,
1789:					       NULL);
1790:		if (!elems) {
1791:			ret = -ENOMEM;
1792:			goto out;
1793:		}
1794:	
1795:		if (elems->parse_error) {
1796:			tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n");
1797:			ret = -EINVAL;
1798:			goto out;
1799:		}
1800:	
1801:		if (!elems->ch_sw_timing || !elems->lnk_id) {
1802:			tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n");
1803:			ret = -EINVAL;
1804:			goto out;
1805:		}
1806:	
1807:		/* validate the initiator is set correctly */
1808:		local_initiator =
1809:			!memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN);
1810:		if (local_initiator == sta->sta.tdls_initiator) {
1811:			tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n");
1812:			ret = -EINVAL;
1813:			goto out;
1814:		}
1815:	
1816:		params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time);
1817:		params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout);
1818:	
1819:		params.tmpl_skb =
1820:			ieee80211_tdls_ch_sw_resp_tmpl_get(sta, &params.ch_sw_tm_ie);
1821:		if (!params.tmpl_skb) {
1822:			ret = -ENOENT;
1823:			goto out;
1824:		}
1825:	
1826:		ret = 0;
1827:	call_drv:
1828:		drv_tdls_recv_channel_switch(sdata->local, sdata, &params);
1829:	
1830:		tdls_dbg(sdata,
1831:			 "TDLS channel switch response received from %pM status %d\n",
1832:			 tf->sa, params.status);
1833:	
1834:	out:
1835:		dev_kfree_skb_any(params.tmpl_skb);
1836:		kfree(elems);
1837:		return ret;
1838:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 27758
							output: 62
							thoughts: 31
						

Okay, here's my interpretation of that thought process, from an expert's perspective:

**Diving into the TDLS Channel Switch Response**

Alright, the code's calling `ieee80211_tdls_ch_sw_resp_tmpl_get`. That's interesting. I know that function; it's the one responsible for getting the template for the TDLS (Tunnelled Direct Link Setup) channel switch response.  I need to refresh my memory on what that template encompasses and where it is used within the overall TDLS process. My immediate thought is, let's take a closer look at what that function does and, more importantly, *why* it's being called at *this* point in the execution flow. Are there any peculiarities I should be aware of here? Are we talking about the initial response, or a subsequent one? Gotta track down the details, as always.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_ch_sw_resp_tmpl_get]

map[SourceCode:1700:	static struct sk_buff *
1701:	ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta,
1702:					   u32 *ch_sw_tm_ie_offset)
1703:	{
1704:		struct ieee80211_sub_if_data *sdata = sta->sdata;
1705:		struct sk_buff *skb;
1706:		u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)];
1707:		int link_id = sta->sta.valid_links ? ffs(sta->sta.valid_links) - 1 : 0;
1708:	
1709:		/* initial timing are always zero in the template */
1710:		iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0);
1711:	
1712:		skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
1713:						link_id,
1714:						WLAN_TDLS_CHANNEL_SWITCH_RESPONSE,
1715:						0, 0, !sta->sta.tdls_initiator,
1716:						extra_ies, sizeof(extra_ies), 0, NULL);
1717:		if (!skb)
1718:			return NULL;
1719:	
1720:		skb = ieee80211_build_data_template(sdata, skb, 0);
1721:		if (IS_ERR(skb)) {
1722:			tdls_dbg(sdata,
1723:				 "Failed building TDLS channel switch resp frame\n");
1724:			return NULL;
1725:		}
1726:	
1727:		if (ch_sw_tm_ie_offset) {
1728:			const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb);
1729:	
1730:			if (!tm_ie) {
1731:				tdls_dbg(sdata,
1732:					 "No switch timing IE in TDLS switch resp\n");
1733:				dev_kfree_skb_any(skb);
1734:				return NULL;
1735:			}
1736:	
1737:			*ch_sw_tm_ie_offset = tm_ie - skb->data;
1738:		}
1739:	
1740:		tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n",
1741:			 sta->sta.addr);
1742:		return skb;
1743:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 28853
							output: 24
							thoughts: 254
						

**Analyzing TDLS Management Frame Construction**

Okay, so I'm looking at how we construct TDLS management frames. My understanding is that when we need a channel switch response, we start with `ieee80211_tdls_build_mgmt_packet_data` using the `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE` action code. Then, `ieee80211_tdls_add_ies` comes into play to deal with the response. Specifically, it calls `ieee80211_tdls_add_chan_switch_resp_ies`. Crucially, it *doesn't* call `ieee80211_tdls_add_setup_cfm_ies` here.

This tells me that `ieee80211_tdls_add_setup_cfm_ies` must be reserved for a specific use case, and only gets invoked when `action_code` is `WLAN_TDLS_SETUP_CONFIRM`. I know that `WLAN_TDLS_SETUP_CONFIRM` is sent via `ieee80211_tdls_mgmt`, which is triggered by `NL80211_CMD_TDLS_MGMT`.

But, before I lock that down completely, I want to double-check my assumptions. It would be easy to miss something in my head. I'm going to do a quick grep for `WLAN_TDLS_SETUP_CONFIRM` throughout the code to ensure I haven't missed a call. Just to be sure.

map[Expression:WLAN_TDLS_SETUP_CONFIRM]

map[Output:drivers/net/wireless/marvell/mwifiex/cfg80211.c=3786=mwifiex_cfg80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3820-		break;
drivers/net/wireless/marvell/mwifiex/cfg80211.c:3821:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3822-		mwifiex_dbg(priv->adapter, MSG,
--
drivers/net/wireless/marvell/mwifiex/tdls.c=464=static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-562-
drivers/net/wireless/marvell/mwifiex/tdls.c:563:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-564-		tf->category = WLAN_CATEGORY_TDLS;
drivers/net/wireless/marvell/mwifiex/tdls.c:565:		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
drivers/net/wireless/marvell/mwifiex/tdls.c-566-		skb_put(skb, sizeof(tf->u.setup_cfm));
--
drivers/net/wireless/marvell/mwifiex/tdls.c=628=int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv, const u8 *peer,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-669-	case WLAN_TDLS_SETUP_REQUEST:
drivers/net/wireless/marvell/mwifiex/tdls.c:670:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-671-	case WLAN_TDLS_TEARDOWN:
--
drivers/net/wireless/marvell/mwifiex/tdls.c-720-	*/
drivers/net/wireless/marvell/mwifiex/tdls.c:721:	if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
drivers/net/wireless/marvell/mwifiex/tdls.c-722-	    action_code == WLAN_TDLS_TEARDOWN)
--
drivers/net/wireless/marvell/mwifiex/tdls.c=894=void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-936-
drivers/net/wireless/marvell/mwifiex/tdls.c:937:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-938-		if (len < (sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN))
--
include/linux/ieee80211.h=1972=enum ieee80211_tdls_actioncode {
--
include/linux/ieee80211.h-1974-	WLAN_TDLS_SETUP_RESPONSE = 1,
include/linux/ieee80211.h:1975:	WLAN_TDLS_SETUP_CONFIRM = 2,
include/linux/ieee80211.h-1976-	WLAN_TDLS_TEARDOWN = 3,
--
net/mac80211/tdls.c=741=static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
--
net/mac80211/tdls.c-759-		break;
net/mac80211/tdls.c:760:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-761-		if (status_code == 0)
--
net/mac80211/tdls.c=791=ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-830-		break;
net/mac80211/tdls.c:831:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-832-		tf->category = WLAN_CATEGORY_TDLS;
net/mac80211/tdls.c:833:		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
net/mac80211/tdls.c-834-
--
net/mac80211/tdls.c=909=ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
--
net/mac80211/tdls.c-959-	case WLAN_TDLS_SETUP_RESPONSE:
net/mac80211/tdls.c:960:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-961-	case WLAN_TDLS_TEARDOWN:
--
net/mac80211/tdls.c=998=ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1022-		fallthrough;
net/mac80211/tdls.c:1023:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-1024-	case WLAN_TDLS_DISCOVERY_REQUEST:
--
net/mac80211/tdls.c=1255=int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1295-		fallthrough;
net/mac80211/tdls.c:1296:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-1297-	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
]

gemini-3-flash-preview

							input: 31212
							output: 49
							thoughts: 1313
						

**TDLS Vulnerability Analysis**

Okay, so I've been digging into this `WLAN_TDLS_SETUP_CONFIRM` issue in `net/mac80211/tdls.c`. My initial observation is that this confirmation is primarily handled during transmission, triggered by `NL80211_CMD_TDLS_MGMT`. It's used in functions like `ieee80211_tdls_add_ies`, `ieee80211_prep_tdls_encap_data`, etc., all part of the transmit path.

My first thought was, where is this handled on receive? I did find that `ieee80211_rx_h_data` in `net/mac80211/rx.c` delivers frames to userspace, but what about other TDLS frames? The only internal processing I see is for Channel Switch frames with `ieee80211_process_tdls_channel_switch`.

So, a remote attacker's TDLS frame generally goes to userspace, likely `wpa_supplicant`. If `wpa_supplicant` decides to send a `WLAN_TDLS_SETUP_CONFIRM`, it uses `NL80211_CMD_TDLS_MGMT`. If `wpa_supplicant` is well-behaved, it should only send this for stations it knows about, created via `NL80211_CMD_NEW_STATION`. In such a case, `sta_info_get(sdata, peer)` should return a non-NULL value.

But, a malicious local user, like what syzkaller does, *can* call `NL80211_CMD_TDLS_MGMT` with an arbitrary MAC address. So, this looks like a local trigger, not a remote one.

Can a remote attacker trigger `ieee80211_tdls_add_setup_cfm_ies`? Not directly; it would require an internal kernel response to a TDLS frame, and I don't see one for `WLAN_TDLS_SETUP_CONFIRM`.

Let's look at `ieee80211_tdls_add_setup_cfm_ies` more closely. It uses `sta_info_get(sdata, sdata->vif.cfg.ap_addr)`. If we're not associated, `sdata->vif.cfg.ap_addr` could be zero or garbage. However, `ieee80211_tdls_mgmt` checks `sdata->u.mgd.associated`.

If `associated` is true, does that guarantee `sta_info_get(sdata, sdata->vif.cfg.ap_addr)` is valid? Usually yes, because the AP station should be in the station list. However, there's a possible race condition where we disassociate but the `associated` flag is still true, or the AP station was removed somehow.

The syzkaller reproducer, as I was told, uses a netlink socket to send `NL80211_CMD_TDLS_MGMT`. This confirms it's a local trigger. Can it be remote? Only if an attacker can force `wpa_supplicant` to send the command, but even then `sta_info` would likely exist.

What if `sta_info` is removed while `ieee80211_tdls_mgmt` is running? The function doesn't seem to hold any locks that prevent station removal, except it uses `rcu_read_lock()` in some places. And `ieee80211_tdls_add_setup_cfm_ies` is called within `rcu_read_lock()` in `ieee80211_tdls_build_mgmt_packet_data`. So, `sta_info_get` returning NULL means the station is gone.

The warning `WARN_ON_ONCE(!sta || !ap_sta)` is triggered when either `sta` or `ap_sta` is NULL.

So, a local user (even unprivileged, if they have access to the netlink socket) sending this command *can* trigger this warning. Usually, `NL80211_CMD_TDLS_MGMT` requires `GENL_ADMIN_PERM`, though. Let me check the permissions for that command in `net/wireless/nl80211.c`...

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_ops]

map[SourceCode:18297:	static const struct genl_ops nl80211_ops[] = {
18298:		{
18299:			.cmd = NL80211_CMD_GET_WIPHY,
18300:			.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
18301:			.doit = nl80211_get_wiphy,
18302:			.dumpit = nl80211_dump_wiphy,
18303:			.done = nl80211_dump_wiphy_done,
18304:			/* can be retrieved by unprivileged users */
18305:			.internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
18306:		},
18307:	};
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 33829
							output: 30
							thoughts: 30
						

Okay, here's my summary, taking on the persona you requested:

**Digging into nl80211 for TDLS Management**

Right, so I'm on a mission to locate `NL80211_CMD_TDLS_MGMT`. It's a key piece in managing TDLS (Tunneled Direct Link Setup) functionality within the wireless stack. I know it has to be defined somewhere, and the most likely place to find this command is nestled within the `nl80211_ops` structure. This structure is a treasure trove, basically the operational interface for the nl80211 subsystem. It defines all the operations that the wireless drivers can provide to the kernel via netlink, and this `TDLS_MGMT` command *has* to be in there somewhere, so I can start to understand the implications of how we are handling direct link setup and teardown. Time to dive into the code and start searching. Hopefully, it is named logically enough to easily find... because if not, I'm going to have to do a lot more searching.

bad expression: fatal: command line, 'NL80211_CMD_TDLS_MGMT.*= {': Unmatched \{

map[Expression:NL80211_CMD_TDLS_MGMT.*= {]

map[Output:]

gemini-3-flash-preview

							input: 34162
							output: 27
							thoughts: 6
						

Okay, here's my attempt at summarizing the thought process, as requested, aimed at an expert audience and written in the first person:

**Refining the Approach**

Alright, let's see... the initial attempt probably failed because of that curly brace. Let me rethink this. The prompt asked for a summary of a thought process. It seems the system interpreted the "brace" as an issue. Removing the brace from the initial prompt should alleviate that perceived challenge. I need to make sure I am responding with a 'fulsome summary', so will ensure I am including the detail of the thought process, not just the result. Let me try that now.

map[Expression:NL80211_CMD_TDLS_MGMT]

map[Output:include/net/cfg80211.h=4901=struct cfg80211_ops {
--
include/net/cfg80211.h-5304- *	link setup/discovery operations internally. Setup, discovery and
include/net/cfg80211.h:5305: *	teardown packets should be sent through the @NL80211_CMD_TDLS_MGMT
include/net/cfg80211.h-5306- *	command. When this flag is not set, @NL80211_CMD_TDLS_OPER should be
--
include/uapi/linux/nl80211.h-896- *	%NL80211_TDLS_TEARDOWN).
include/uapi/linux/nl80211.h:897: * @NL80211_CMD_TDLS_MGMT: Send a TDLS management frame. The
include/uapi/linux/nl80211.h-898- *	%NL80211_ATTR_TDLS_ACTION attribute determines the type of frame to be
--
include/uapi/linux/nl80211.h=1367=enum nl80211_commands {
--
include/uapi/linux/nl80211.h-1492-	NL80211_CMD_TDLS_OPER,
include/uapi/linux/nl80211.h:1493:	NL80211_CMD_TDLS_MGMT,
include/uapi/linux/nl80211.h-1494-
--
include/uapi/linux/nl80211.h-2153- *	procedures should be performed by sending TDLS packets via
include/uapi/linux/nl80211.h:2154: *	%NL80211_CMD_TDLS_MGMT. Otherwise %NL80211_CMD_TDLS_OPER should be
include/uapi/linux/nl80211.h-2155- *	used for asking the driver to perform a TDLS operation.
--
net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
--
net/wireless/nl80211.c-18796-	{
net/wireless/nl80211.c:18797:		.cmd = NL80211_CMD_TDLS_MGMT,
net/wireless/nl80211.c-18798-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
]

gemini-3-flash-preview

							input: 35038
							output: 52
							thoughts: 35
						

Okay, let's dive into this. Here's how I'd approach this task, as if these were my internal thoughts:

**Dissecting the `NL80211_CMD_TDLS_MGMT` Command**

Alright, I need to get a clear understanding of `NL80211_CMD_TDLS_MGMT`. My first instinct is to check its definition within the `nl80211_small_ops` structure. I'm assuming it's related to TDLS management, but the specific details are key here. I need to know the context of this command: is it for initiating, configuring, or monitoring TDLS connections? What kind of parameters does it take? What does the expected response look like? I'll probably be able to infer all of this by looking at its implementation and the related data structures within the kernel code, but I need a solid starting point. Understanding what this command *is* is the foundational step here. Once I have the core definition, I can start to connect it to the bigger picture of TDLS functionality and potentially to other related commands and configurations within the 802.11 stack.

map[ContextFile:net/wireless/nl80211.c IncludeLines:true Name:nl80211_tdls_mgmt]

map[SourceCode:13691:	static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
13692:	{
13693:		struct cfg80211_registered_device *rdev = info->user_ptr[0];
13694:		struct net_device *dev = info->user_ptr[1];
13695:		u8 action_code, dialog_token;
13696:		u32 peer_capability = 0;
13697:		u16 status_code;
13698:		u8 *peer;
13699:		int link_id;
13700:		bool initiator;
13701:	
13702:		if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
13703:		    !rdev->ops->tdls_mgmt)
13704:			return -EOPNOTSUPP;
13705:	
13706:		if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
13707:		    !info->attrs[NL80211_ATTR_STATUS_CODE] ||
13708:		    !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
13709:		    !info->attrs[NL80211_ATTR_IE] ||
13710:		    !info->attrs[NL80211_ATTR_MAC])
13711:			return -EINVAL;
13712:	
13713:		peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
13714:		action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
13715:		status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
13716:		dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
13717:		initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
13718:		if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
13719:			peer_capability =
13720:				nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
13721:		link_id = nl80211_link_id_or_invalid(info->attrs);
13722:	
13723:		return rdev_tdls_mgmt(rdev, dev, peer, link_id, action_code,
13724:				      dialog_token, status_code, peer_capability,
13725:				      initiator,
13726:				      nla_data(info->attrs[NL80211_ATTR_IE]),
13727:				      nla_len(info->attrs[NL80211_ATTR_IE]));
13728:	}
 SourceFile:net/wireless/nl80211.c]

gemini-3-flash-preview

							input: 36278
							output: 32
							thoughts: 2150
						

**Vulnerability Analysis of TDLS Management Frames**

Okay, let's break this down. My initial focus is on the `NL80211_CMD_TDLS_MGMT` command, and that it requires `CAP_NET_ADMIN`. This suggests the potential for remote exploitation, especially considering `wpa_supplicant` runs as root. The question is, can a remote attacker trigger a condition that leads to this command being exploited?

My thought process led me to examine how `wpa_supplicant` handles incoming TDLS frames, and specifically, the `WLAN_TDLS_SETUP_CONFIRM` frame type. The concern is that if `wpa_supplicant` is tricked into sending a `WLAN_TDLS_SETUP_CONFIRM` for a peer not yet recognized by the kernel, we have a potentially exploitable condition.

The initial thought was that `wpa_supplicant` should add the station before the setup. But, what if the station is removed? This led me to a specific warning message in `net/mac80211/tdls.c:611`, `!sta || !ap_sta`. This warning indicates a NULL pointer dereference, which is triggered when `sta_info_get` fails for either the peer or the AP. The core question is how to get a state where the check fails.

The code checks if we are associated and then ensures we have valid `sta_info` entries for both the peer and AP. The scenario I want to investigate is where association is true, but the AP `sta_info` is gone. Could this be a bug in mac80211 association state management?

The syzkaller reproducer seems to be triggering exactly this warning. I'm now looking for the root cause of the issue, and how it could be exploited.

Can a remote attacker trigger this?
If the attacker sends a TDLS Setup Response, `wpa_supplicant` might respond with a Setup Confirm.
But `wpa_supplicant` only sends a Setup Response if it's already in a TDLS setup with that peer.
And if it's in a TDLS setup, it should have added the peer station.

However, the key insight is that the kernel *doesn't* check for the station's existence when *receiving* a `WLAN_TDLS_SETUP_CONFIRM`. So, an attacker *directly* can't trigger this warning. This leads me to believe the kernel warning is in the transmit path.

My goal now is to track down all calls to `ieee80211_tdls_add_setup_cfm_ies`. I check callers of `ieee80211_tdls_add_ies`, and realize the only way to trigger the warning is by *sending* a `WLAN_TDLS_SETUP_CONFIRM` frame via `NL80211_CMD_TDLS_MGMT`.

I then recall seeing `ieee80211_process_tdls_channel_switch` and wonder if it could trigger the warning. I do a sanity check in `net/mac80211/tdls.c:2006` and see that it has a switch on `tf->action_code`. I realize now that `WLAN_TDLS_SETUP_CONFIRM` is not handled by the kernel via this function. `WLAN_TDLS_SETUP_CONFIRM` frames received over the air are not processed by the kernel. So, I am back to the original conclusion.

So to recap: The only way to trigger the warning is for userspace to *send* a `WLAN_TDLS_SETUP_CONFIRM` frame.

map[Expression:ieee80211_tdls_build_mgmt_packet_data]

map[Output:net/mac80211/tdls.c=908=static struct sk_buff *
net/mac80211/tdls.c:909:ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
net/mac80211/tdls.c-910-				      const u8 *peer, int link_id,
--
net/mac80211/tdls.c=998=ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1057-
net/mac80211/tdls.c:1058:	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
net/mac80211/tdls.c-1059-						    link_id, action_code,
--
net/mac80211/tdls.c=1550=ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class,
--
net/mac80211/tdls.c-1586-
net/mac80211/tdls.c:1587:	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
net/mac80211/tdls.c-1588-					      link_id,
--
net/mac80211/tdls.c=1701=ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta,
--
net/mac80211/tdls.c-1711-
net/mac80211/tdls.c:1712:	skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr,
net/mac80211/tdls.c-1713-					link_id,
]

gemini-3-flash-preview

							input: 39851
							output: 59
							thoughts: 808
						

**Analyzing TDLS Setup and Potential Vulnerabilities**

Okay, let me break this down. It seems we're looking at how TDLS channel switching and management frames are handled. I see that the `ieee80211_tdls_ch_sw_tmpl_get` and `ieee80211_tdls_ch_sw_resp_tmpl_get` functions are using specific WLAN TDLS request/response types. Meanwhile, `ieee80211_tdls_prep_mgmt_packet` seems more flexible, using the `action_code` passed from `ieee80211_tdls_mgmt`. This suggests that the `WLAN_TDLS_SETUP_CONFIRM` is primarily used when explicitly requested by userspace.

Now, that `ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr)` call is key. If I'm a station and associated, then `sdata->vif.cfg.ap_addr` should contain my AP's MAC, and thus `sta_info_get` should return a valid station information entry. The code also explicitly checks if I'm not associated before proceeding with some TDLS operations, which is good.

If the device *is* associated, but `sta_info_get` returns NULL, that's a problem. The most likely cause is that the AP's station entry has been removed, but the `associated` flag hasn't been cleared yet. The more common issue seems to be a NULL `sta` because of the `peer` MAC address provided by userspace, which doesn't exist in the station list.

The real question is, can this be triggered remotely? Can a remote attacker somehow manipulate either `sta` or `ap_sta` to be NULL while a TDLS setup is underway, then force the Setup Confirm to be sent? It seems unlikely with the `sta` condition, because that would require a non-existent station.

However, if a remote attacker sends a TDLS frame, and `wpa_supplicant` responds with Setup Confirm without adding the station first?

Wait a minute, `wpa_supplicant` *has* to add the station to the kernel for TDLS to function, otherwise, the kernel can't send frames to it. But maybe not? The TDLS frames *can* be sent through the AP. `ieee80211_prep_tdls_encap_data` is responsible for building an encapsulated data frame. It doesn't necessarily need a `sta_info` for the peer if it's sending it through the AP. Okay, let's look at `ieee80211_prep_tdls_encap_data` to confirm.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_prep_tdls_encap_data]

map[SourceCode: 790:	static int
 791:	ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 792:				       struct ieee80211_link_data *link,
 793:				       const u8 *peer, u8 action_code, u8 dialog_token,
 794:				       u16 status_code, struct sk_buff *skb)
 795:	{
 796:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 797:		struct ieee80211_tdls_data *tf;
 798:	
 799:		tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
 800:	
 801:		memcpy(tf->da, peer, ETH_ALEN);
 802:		memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
 803:		tf->ether_type = cpu_to_be16(ETH_P_TDLS);
 804:		tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
 805:	
 806:		/* network header is after the ethernet header */
 807:		skb_set_network_header(skb, ETH_HLEN);
 808:	
 809:		switch (action_code) {
 810:		case WLAN_TDLS_SETUP_REQUEST:
 811:			tf->category = WLAN_CATEGORY_TDLS;
 812:			tf->action_code = WLAN_TDLS_SETUP_REQUEST;
 813:	
 814:			skb_put(skb, sizeof(tf->u.setup_req));
 815:			tf->u.setup_req.dialog_token = dialog_token;
 816:			tf->u.setup_req.capability =
 817:				cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 818:									 status_code));
 819:			break;
 820:		case WLAN_TDLS_SETUP_RESPONSE:
 821:			tf->category = WLAN_CATEGORY_TDLS;
 822:			tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
 823:	
 824:			skb_put(skb, sizeof(tf->u.setup_resp));
 825:			tf->u.setup_resp.status_code = cpu_to_le16(status_code);
 826:			tf->u.setup_resp.dialog_token = dialog_token;
 827:			tf->u.setup_resp.capability =
 828:				cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 829:									 status_code));
 830:			break;
 831:		case WLAN_TDLS_SETUP_CONFIRM:
 832:			tf->category = WLAN_CATEGORY_TDLS;
 833:			tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
 834:	
 835:			skb_put(skb, sizeof(tf->u.setup_cfm));
 836:			tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
 837:			tf->u.setup_cfm.dialog_token = dialog_token;
 838:			break;
 839:		case WLAN_TDLS_TEARDOWN:
 840:			tf->category = WLAN_CATEGORY_TDLS;
 841:			tf->action_code = WLAN_TDLS_TEARDOWN;
 842:	
 843:			skb_put(skb, sizeof(tf->u.teardown));
 844:			tf->u.teardown.reason_code = cpu_to_le16(status_code);
 845:			break;
 846:		case WLAN_TDLS_DISCOVERY_REQUEST:
 847:			tf->category = WLAN_CATEGORY_TDLS;
 848:			tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
 849:	
 850:			skb_put(skb, sizeof(tf->u.discover_req));
 851:			tf->u.discover_req.dialog_token = dialog_token;
 852:			break;
 853:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 854:			tf->category = WLAN_CATEGORY_TDLS;
 855:			tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
 856:	
 857:			skb_put(skb, sizeof(tf->u.chan_switch_req));
 858:			break;
 859:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 860:			tf->category = WLAN_CATEGORY_TDLS;
 861:			tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
 862:	
 863:			skb_put(skb, sizeof(tf->u.chan_switch_resp));
 864:			tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
 865:			break;
 866:		default:
 867:			return -EINVAL;
 868:		}
 869:	
 870:		return 0;
 871:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 42869
							output: 36
							thoughts: 839
						

**Analyzing the TDLS Warning Trigger**

Okay, so here's what I'm thinking. This warning arises specifically when `ieee80211_tdls_add_setup_cfm_ies` is called, and this function is called from `ieee80211_tdls_add_ies` which is in the function `ieee80211_tdls_prep_mgmt_packet`. The initial issue stems from the kernel processing a TDLS management frame *without* a valid `sta_info` entry.

Initially, I see that the code copies the peer MAC into `tf->da` without using `sta_info`. This allows the packet to be built even if the station isn't yet established. The real problem surfaces when `ieee80211_tdls_add_ies` is subsequently invoked, and *that's* when the `sta_info` check occurs, ultimately leading to the warning if `sta` is NULL.

So, the key question is whether this is remotely triggerable. My initial thought was that a malicious user could exploit this through crafted TDLS frames. Specifically, if a user sends a `NL80211_CMD_TDLS_MGMT` command to the kernel with an action code of `WLAN_TDLS_SETUP_CONFIRM` without adding the station, the kernel's `ieee80211_tdls_add_setup_cfm_ies` would get triggered and generate the warning.

However, I'm now realizing this might not be straightforward. The usual scenario involves `wpa_supplicant`. If `wpa_supplicant` is running and properly managing the TDLS handshake, it should *always* create a `sta_info` entry before sending a Setup Confirm. If it doesn't, that's a bug in `wpa_supplicant`.

I considered an attacker directly sending a TDLS Setup Response. But the code checks if the station exists before sending the response in `NL80211_CMD_TDLS_MGMT`, returning `-ENOLINK` if it doesn't.

What about a Setup Confirm? I realize that it's `ieee80211_tdls_mgmt` for `WLAN_TDLS_SETUP_CONFIRM` which *bypasses* the check in the `mgmt_setup` function, directly calling `ieee80211_tdls_prep_mgmt_packet`. So, if `wpa_supplicant` *does* send a Setup Confirm for a nonexistent station, the warning is triggered. However, I can't imagine why `wpa_supplicant` would do that unless there's a bug in its TDLS implementation.

My next step is to examine the code and determine if there's any mechanism, without userspace intervention, that could cause the kernel to call `ieee80211_tdls_add_setup_cfm_ies` on its own. I need to make sure that the kernel doesn't have an auto-responder for TDLS Setup Confirm messages. To do that, I'll use `codesearch-find-references` to make sure there are no other places where `ieee80211_tdls_add_setup_cfm_ies` is called to verify if this vulnerability is exploitable by a remote attacker.

map[Name:ieee80211_tdls_add_setup_cfm_ies]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_add_ies SourceFile:net/mac80211/tdls.c SourceLine:762]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 44564
							output: 58
							thoughts: 135
						

**Analyzing the IEEE 802.11 TDLS Information Element Handling**

Okay, so I'm focusing on the intricacies of TDLS, specifically how Information Elements (IEs) are added. The key function I'm concerned with here is `ieee80211_tdls_add_ies`. I know this function is crucial, but I want to ensure I understand its call hierarchy.

Right now, my initial analysis indicates it's invoked from two key locations: `ieee80211_tdls_build_mgmt_packet_data` – that makes sense for crafting management frames – and `ieee80211_process_tdls_channel_switch`. Hmm, the channel switch one warrants a closer look, given that channel changes often introduce subtle bugs. I should double-check this one.

Let's dive into `ieee80211_process_tdls_channel_switch` now, specifically in `net/mac80211/tdls.c`. I need to understand how the IEs are incorporated during the channel switching process. This is the critical piece of the puzzle to focus on.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_process_tdls_channel_switch]

map[SourceCode:2005:	void
2006:	ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata,
2007:					      struct sk_buff *skb)
2008:	{
2009:		struct ieee80211_tdls_data *tf = (void *)skb->data;
2010:		struct wiphy *wiphy = sdata->local->hw.wiphy;
2011:	
2012:		lockdep_assert_wiphy(wiphy);
2013:	
2014:		/* make sure the driver supports it */
2015:		if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
2016:			return;
2017:	
2018:		/* we want to access the entire packet */
2019:		if (skb_linearize(skb))
2020:			return;
2021:		/*
2022:		 * The packet/size was already validated by mac80211 Rx path, only look
2023:		 * at the action type.
2024:		 */
2025:		switch (tf->action_code) {
2026:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
2027:			ieee80211_process_tdls_channel_switch_req(sdata, skb);
2028:			break;
2029:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
2030:			ieee80211_process_tdls_channel_switch_resp(sdata, skb);
2031:			break;
2032:		default:
2033:			WARN_ON_ONCE(1);
2034:			return;
2035:		}
2036:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 45552
							output: 24
							thoughts: 379
						

**Analyzing the TDLS Information Element (IE) Insertion Path**

Okay, so I'm digging into how the TDLS (Tunneled Direct Link Setup) IEs are added to the management frames. My initial thought was that `ieee80211_tdls_add_ies` might be called directly, but that's not the case. It looks like the path is a bit more indirect, at least for the channel switch response.

`ieee80211_process_tdls_channel_switch_resp` seems to be the entry point, which calls `ieee80211_tdls_ch_sw_resp_tmpl_get`. This function then calls `ieee80211_tdls_build_mgmt_packet_data`, and finally, *that* function is the one that calls `ieee80211_tdls_add_ies`.

The key here is that when `ieee80211_tdls_ch_sw_resp_tmpl_get` is called, it passes `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE` to the function which then passes it to the add_ies function. `ieee80211_tdls_add_ies` handles the `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE` type, in turn, by calling the function `ieee80211_tdls_add_chan_switch_resp_ies`. And from what I see, it *doesn't* call `ieee80211_tdls_add_setup_cfm_ies` in this particular code flow.

So, it's pretty clear that `ieee80211_tdls_add_setup_cfm_ies` is only called for `WLAN_TDLS_SETUP_CONFIRM`. But is there *any* other route to `ieee80211_tdls_add_ies` with `WLAN_TDLS_SETUP_CONFIRM`? I need to be absolutely sure I understand all the possible paths. I'm going to search the codebase and grep for the `WLAN_TDLS_SETUP_CONFIRM` enum again to see where else it's used as an argument. I need to make sure I haven't missed a call path.

map[Expression:WLAN_TDLS_SETUP_CONFIRM]

map[Output:drivers/net/wireless/marvell/mwifiex/cfg80211.c=3786=mwifiex_cfg80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3820-		break;
drivers/net/wireless/marvell/mwifiex/cfg80211.c:3821:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3822-		mwifiex_dbg(priv->adapter, MSG,
--
drivers/net/wireless/marvell/mwifiex/tdls.c=464=static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-562-
drivers/net/wireless/marvell/mwifiex/tdls.c:563:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-564-		tf->category = WLAN_CATEGORY_TDLS;
drivers/net/wireless/marvell/mwifiex/tdls.c:565:		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
drivers/net/wireless/marvell/mwifiex/tdls.c-566-		skb_put(skb, sizeof(tf->u.setup_cfm));
--
drivers/net/wireless/marvell/mwifiex/tdls.c=628=int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv, const u8 *peer,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-669-	case WLAN_TDLS_SETUP_REQUEST:
drivers/net/wireless/marvell/mwifiex/tdls.c:670:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-671-	case WLAN_TDLS_TEARDOWN:
--
drivers/net/wireless/marvell/mwifiex/tdls.c-720-	*/
drivers/net/wireless/marvell/mwifiex/tdls.c:721:	if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
drivers/net/wireless/marvell/mwifiex/tdls.c-722-	    action_code == WLAN_TDLS_TEARDOWN)
--
drivers/net/wireless/marvell/mwifiex/tdls.c=894=void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-936-
drivers/net/wireless/marvell/mwifiex/tdls.c:937:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-938-		if (len < (sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN))
--
include/linux/ieee80211.h=1972=enum ieee80211_tdls_actioncode {
--
include/linux/ieee80211.h-1974-	WLAN_TDLS_SETUP_RESPONSE = 1,
include/linux/ieee80211.h:1975:	WLAN_TDLS_SETUP_CONFIRM = 2,
include/linux/ieee80211.h-1976-	WLAN_TDLS_TEARDOWN = 3,
--
net/mac80211/tdls.c=741=static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
--
net/mac80211/tdls.c-759-		break;
net/mac80211/tdls.c:760:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-761-		if (status_code == 0)
--
net/mac80211/tdls.c=791=ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-830-		break;
net/mac80211/tdls.c:831:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-832-		tf->category = WLAN_CATEGORY_TDLS;
net/mac80211/tdls.c:833:		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
net/mac80211/tdls.c-834-
--
net/mac80211/tdls.c=909=ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
--
net/mac80211/tdls.c-959-	case WLAN_TDLS_SETUP_RESPONSE:
net/mac80211/tdls.c:960:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-961-	case WLAN_TDLS_TEARDOWN:
--
net/mac80211/tdls.c=998=ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1022-		fallthrough;
net/mac80211/tdls.c:1023:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-1024-	case WLAN_TDLS_DISCOVERY_REQUEST:
--
net/mac80211/tdls.c=1255=int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1295-		fallthrough;
net/mac80211/tdls.c:1296:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-1297-	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
]

gemini-3-flash-preview

							input: 48206
							output: 34
							thoughts: 478
						

**Analyzing the WLAN_TDLS_SETUP_CONFIRM Path**

Okay, let's break down the usage of `WLAN_TDLS_SETUP_CONFIRM`. Initially, it *looks* like it's only used within the `NL80211_CMD_TDLS_MGMT` path in `net/mac80211/tdls.c`. I need to be absolutely certain, though.

First, I double-checked the call stack: Specifically, I wanted to verify whether `ieee80211_tdls_add_setup_cfm_ies` *could* be called via `ieee80211_tdls_add_ies` with an `action_code` other than `WLAN_TDLS_SETUP_CONFIRM`. The switch statement within `ieee80211_tdls_add_ies` is pretty definitive: it's *only* called within that specific case.

Therefore, it's clear: `ieee80211_tdls_add_setup_cfm_ies` *only* gets executed when `action_code` is `WLAN_TDLS_SETUP_CONFIRM`. That's an important point.

Now, where does `WLAN_TDLS_SETUP_CONFIRM` itself come from? It's passed to `ieee80211_tdls_add_ies` via `ieee80211_tdls_build_mgmt_packet_data`. So, let's trace that.

Looking at the code, `ieee80211_tdls_build_mgmt_packet_data` *only* gets called with `WLAN_TDLS_SETUP_CONFIRM` from `ieee80211_tdls_prep_mgmt_packet`. And where is *that* called? Well, from what I've seen, it's called from `ieee80211_tdls_mgmt` *specifically* when dealing with `WLAN_TDLS_SETUP_CONFIRM`.

Okay, I need to be 100% sure. I'm going to double check that `ieee80211_tdls_prep_mgmt_packet` isn't used anywhere else, outside this narrow path. I'll need to use `codesearch-find-references` to verify. I'll do that now.

map[Name:ieee80211_tdls_prep_mgmt_packet]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt SourceFile:net/mac80211/tdls.c SourceLine:1299] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt_setup SourceFile:net/mac80211/tdls.c SourceLine:1186] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt_teardown SourceFile:net/mac80211/tdls.c SourceLine:1229]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 49466
							output: 21
							thoughts: 1882
						

**Analyzing the Remotely Triggerable Vulnerability**

Okay, so the question is whether a remote attacker can trigger this `WARN_ON_ONCE` in the TDLS code. I've broken down the code flow and potential attack vectors.

The warning's triggered by `ieee80211_tdls_add_setup_cfm_ies` when `sta` or `ap_sta` are null. This function is called during the TDLS Setup Confirm frame transmission. This frame is the third step of TDLS setup, initiated through the AP.

Initially, I see that the warning can be invoked by `NL80211_CMD_TDLS_MGMT`, which, in itself, requires `CAP_NET_ADMIN`. But then, I'm thinking about indirect paths where a remote attacker sends a TDLS frame which is processed by the local wireless daemon, `wpa_supplicant`, which then attempts an action on a non-existent station.

My thoughts are: the warning can be triggered when a TDLS Setup Confirm frame is sent, and at that time either the TDLS peer (`sta`) or the AP station (`ap_sta`) are not found. I need to figure out why this could happen.

The most likely scenario is when an attacker can somehow get the peer station or the AP station removed from the kernel's station list between the TDLS steps. This could be achieved by spoofing a deauth. But the kernel should set the associated flag to false.

My suspicion centers on `ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);`. If the AP station is removed, this might fail, potentially due to a race condition with deauthentication. But, `ieee80211_tdls_mgmt` checks `sdata->u.mgd.associated`.

If `sdata->u.mgd.associated` is true, but `sta_info_get(sdata, sdata->vif.cfg.ap_addr)` is NULL, that's a kernel inconsistency. This seems like a promising attack vector.

However, after a complete analysis, it seems very unlikely to be triggered remotely in normal scenarios, since `wpa_supplicant` manages the stations and is unlikely to send a TDLS Setup Confirm for a missing station, if the local setup with the peer is initiated through the AP and the peer station is also removed through a race condition from a Deauthentication frame, it could occur but this is an edge case.

Syzkaller probably triggers it locally by using `NL80211_CMD_TDLS_MGMT` with invalid parameters.

map[Expression:u.mgd.associated =]

map[Output:net/mac80211/mlme.c=4003=static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
--
net/mac80211/mlme.c-4013-
net/mac80211/mlme.c:4014:	sdata->u.mgd.associated = true;
net/mac80211/mlme.c-4015-
]

gemini-3-flash-preview

							input: 52081
							output: 22
							thoughts: 7
						

Okay, here's the summarized thought process, as if it were my own, assuming the role of an expert:

**Reflecting on the Outcome**

Okay, so we've reached a point where things are… clear. The fog has lifted. The path forward, the ramifications, the implications… they're all visible now. The initial ambiguity, the potential for various interpretations, the uncertainties that clouded the initial stages... all of that has dissipated. The final state is understood. We know precisely where we stand.

no matches

map[Expression:u.mgd.associated = false]

map[Output:]

gemini-3-flash-preview

							input: 52232
							output: 54
							thoughts: 21
						

Here's a summary of my thinking process, assuming I'm an expert:

**Investigating a Disassociation Issue**

Okay, so I'm trying to track down where this disassociation is happening. My initial thought is to check `ieee80211_set_disassociated`. That function is a prime suspect since the name itself strongly suggests it's handling the disassociation state. It's the logical place to start digging into the code to see if the disassociation action is being triggered from here and, if so, how. I need to understand the call stack leading to this function, and what the surrounding context looks like – what parameters are passed, what variables are set, and what conditions are being checked. Is there a race condition? Is there a subtle bug in the logic that's leading to an unintended disassociation? Time to dive in!

requested entity does not exist

map[ContextFile:net/mac80211/mlme.c IncludeLines:true Name:ieee80211_set_disassociated]

map[SourceCode: SourceFile:]

gemini-3-flash-preview

							input: 52511
							output: 53
							thoughts: 29
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Investigating 802.11 Association and Disassociation**

Right, let's take a quick look at how association is handled in the `ieee80211` framework. Specifically, I need to check out `ieee80211_set_associated`. My gut feeling is that there should be a corresponding function, or at least a related mechanism, for handling disassociation. You know, to ensure proper cleanup, state transitions, resource release, and that sort of thing. It's a fundamental part of the state machine, and I can't imagine they'd leave a dangling association without a proper way to un-associate. Probably related to the station's internal state machine, but I need to see if it's explicitly called somewhere in the driver. Let me dig in and see what's what.

map[ContextFile:net/mac80211/mlme.c IncludeLines:true Name:ieee80211_set_associated]

map[SourceCode:4003:	static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
4004:					     struct ieee80211_mgd_assoc_data *assoc_data,
4005:					     u64 changed[IEEE80211_MLD_MAX_NUM_LINKS])
4006:	{
4007:		struct ieee80211_local *local = sdata->local;
4008:		struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg;
4009:		u64 vif_changed = BSS_CHANGED_ASSOC;
4010:		unsigned int link_id;
4011:	
4012:		lockdep_assert_wiphy(local->hw.wiphy);
4013:	
4014:		sdata->u.mgd.associated = true;
4015:	
4016:		for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
4017:			struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
4018:			struct ieee80211_link_data *link;
4019:	
4020:			if (!cbss ||
4021:			    assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
4022:				continue;
4023:	
4024:			if (ieee80211_vif_is_mld(&sdata->vif) &&
4025:			    !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id)))
4026:				continue;
4027:	
4028:			link = sdata_dereference(sdata->link[link_id], sdata);
4029:			if (WARN_ON(!link))
4030:				return;
4031:	
4032:			changed[link_id] |= ieee80211_link_set_associated(link, cbss);
4033:		}
4034:	
4035:		/* just to be sure */
4036:		ieee80211_stop_poll(sdata);
4037:	
4038:		ieee80211_led_assoc(local, 1);
4039:	
4040:		vif_cfg->assoc = 1;
4041:	
4042:		/* Enable ARP filtering */
4043:		if (vif_cfg->arp_addr_cnt)
4044:			vif_changed |= BSS_CHANGED_ARP_FILTER;
4045:	
4046:		if (ieee80211_vif_is_mld(&sdata->vif)) {
4047:			for (link_id = 0;
4048:			     link_id < IEEE80211_MLD_MAX_NUM_LINKS;
4049:			     link_id++) {
4050:				struct ieee80211_link_data *link;
4051:				struct cfg80211_bss *cbss = assoc_data->link[link_id].bss;
4052:	
4053:				if (!cbss ||
4054:				    !(BIT(link_id) &
4055:				      ieee80211_vif_usable_links(&sdata->vif)) ||
4056:				    assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS)
4057:					continue;
4058:	
4059:				link = sdata_dereference(sdata->link[link_id], sdata);
4060:				if (WARN_ON(!link))
4061:					return;
4062:	
4063:				ieee80211_link_info_change_notify(sdata, link,
4064:								  changed[link_id]);
4065:	
4066:				ieee80211_recalc_smps(sdata, link);
4067:			}
4068:	
4069:			ieee80211_vif_cfg_change_notify(sdata, vif_changed);
4070:		} else {
4071:			ieee80211_bss_info_change_notify(sdata,
4072:							 vif_changed | changed[0]);
4073:		}
4074:	
4075:		ieee80211_recalc_ps(local);
4076:	
4077:		/* leave this here to not change ordering in non-MLO cases */
4078:		if (!ieee80211_vif_is_mld(&sdata->vif))
4079:			ieee80211_recalc_smps(sdata, &sdata->deflink);
4080:		ieee80211_recalc_ps_vif(sdata);
4081:	
4082:		netif_carrier_on(sdata->dev);
4083:	}
 SourceFile:net/mac80211/mlme.c]

gemini-3-flash-preview

							input: 54261
							output: 17
							thoughts: 15
						

Okay, here's my summary, in the first person, as if these are my thoughts, keeping in mind I'm an expert in my field:

**Debugging False Associations**

Alright, I'm diving in. The issue seems to hinge on something being wrongly "associated" and, critically, that this association is set to `false`. My first instinct is to zero in on *where* this `associated` flag is actually being assigned a value of `false`. It's a binary state, so tracing the assignment, or assignments, is the most direct path to understanding the root cause. I'll need to use my preferred search tools and leverage my understanding of the codebase's structure to pinpoint the relevant lines of code quickly. The key will be to identify the specific conditional logic or function calls that set `associated` to `false` and examine the variables influencing that logic. Hopefully, it’s not buried too deep in some obscure function call. This is usually a straightforward process, but the elegance of the solution will come down to identifying the precise conditions under which this `false` value is set, and why it's not behaving as intended, so I can start by searching and isolating the areas where it is set to `false`, and go from there.

map[Expression:associated = false]

map[Output:net/mac80211/mlme.c=4117=static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
--
net/mac80211/mlme.c-4147-
net/mac80211/mlme.c:4148:	ifmgd->associated = false;
net/mac80211/mlme.c-4149-
--
net/mac80211/scan.c=923=static void ieee80211_scan_state_decision(struct ieee80211_local *local,
--
net/mac80211/scan.c-925-{
net/mac80211/scan.c:926:	bool associated = false;
net/mac80211/scan.c-927-	bool tx_empty = true;
]

gemini-3-flash-preview

							input: 54811
							output: 29
							thoughts: 800
						

**Analyzing the TDLS Setup Confirm Frame Vulnerability**

Okay, so I'm digging into this warning and trying to figure out how it can be triggered. The warning seems to originate in `ieee80211_tdls_add_setup_cfm_ies`. My initial thought was that a remote attacker sending a Deauth frame could somehow cause this, since it calls `ieee80211_set_disassoc`, which sets the `associated` flag to `false`. Then, `ieee80211_tdls_mgmt` returns `-EINVAL`. However, the code's logic makes it hard to see a direct connection.

The user asked if a remote attacker could trigger this by sending a TDLS frame. That got me thinking. TDLS frames are received and passed to userspace; the kernel doesn't *automatically* invoke `ieee80211_tdls_add_setup_cfm_ies` in response to an incoming TDLS frame. This function is only invoked when *sending* a Setup Confirm frame, which is initiated by the local userspace. So, my initial conclusion is "No, a remote attacker can't trigger this vulnerability via over-the-air TDLS frames."

However, I needed to confirm this. I re-examined `ieee80211_tdls_mgmt_setup` to ensure the kernel doesn't handle the Setup Confirm automatically, and it handles `WLAN_TDLS_SETUP_REQUEST` and `WLAN_TDLS_SETUP_RESPONSE`. It doesn't appear to be doing that. I know TDLS setup is usually handled by `wpa_supplicant`, so that reinforced my confidence that an over-the-air trigger is unlikely.

Now, I'm focusing on the stack trace from the syzkaller reproducer: `ieee80211_tdls_add_setup_cfm_ies`, `ieee80211_tdls_add_ies`, `ieee80211_tdls_build_mgmt_packet_data`, `ieee80211_tdls_prep_mgmt_packet`, `ieee80211_tdls_mgmt`. This clearly points to `ieee80211_tdls_mgmt` as the origin. `ieee80211_tdls_mgmt` is called by `rdev_tdls_mgmt` which is called by `nl80211_tdls_mgmt`. So, it's definitely a local trigger via netlink. I double checked the references, but there's no other way to reach `ieee80211_tdls_add_setup_cfm_ies`.

Finally, I checked where `ieee80211_tdls_add_ies` is called. It's called from `ieee80211_tdls_build_mgmt_packet_data`, and from `ieee80211_process_tdls_channel_switch`.

map[Expression:ieee80211_tdls_add_ies\(]

map[Output:net/mac80211/tdls.c=728=ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_link_data *link,
--
net/mac80211/tdls.c-740-
net/mac80211/tdls.c:741:static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
net/mac80211/tdls.c-742-				   struct sk_buff *skb, const u8 *peer,
--
net/mac80211/tdls.c=909=ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
--
net/mac80211/tdls.c-983-
net/mac80211/tdls.c:984:	ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
net/mac80211/tdls.c-985-			       initiator, extra_ies, extra_ies_len, oper_class,
]

gemini-3-flash-preview

							input: 56648
							output: 32
							thoughts: 140
						

**Analyzing the `ieee80211_tdls_add_ies` Function Call**

Hmm, only one call site for `ieee80211_tdls_add_ies`? That seems...unusual. I'd better double-check. Let's head over to `net/mac80211/tdls.c` and take a look around line 984, where I'd expect to find it. Yep, there it is:

```c
 984:		ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
 985:				       initiator, extra_ies, extra_ies_len, oper_class,
 986:				       chandef);
```

Okay, confirmed. Now, just to be absolutely sure, I should verify that there aren't any *other* calls to this function, anywhere else in the codebase. One call site is possible, but I need to confirm the code's intended architecture.

map[Name:ieee80211_tdls_add_ies]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_build_mgmt_packet_data SourceFile:net/mac80211/tdls.c SourceLine:984]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 57149
							output: 30
							thoughts: 550
						

**Analyzing the Call Stack for `ieee80211_tdls_add_ies`**

Okay, so I've narrowed this down. `ieee80211_tdls_add_ies` is only called once, from `ieee80211_tdls_build_mgmt_packet_data`. That's the key. Now, `ieee80211_tdls_build_mgmt_packet_data` itself has a few call sites: `ieee80211_tdls_prep_mgmt_packet`, `ieee80211_tdls_ch_sw_tmpl_get`, and `ieee80211_tdls_ch_sw_resp_tmpl_get`.  I already know that the channel switch template getters don't trigger that particular call path to the warning, as they're using different message types, `WLAN_TDLS_CHANNEL_SWITCH_REQUEST` and `WLAN_TDLS_CHANNEL_SWITCH_RESPONSE`, respectively.

Therefore, the only remaining route to that warning is through `ieee80211_tdls_prep_mgmt_packet`, specifically when `action_code` is set to `WLAN_TDLS_SETUP_CONFIRM`.

Thinking about it further, I see that `ieee80211_tdls_prep_mgmt_packet` is only called with that `WLAN_TDLS_SETUP_CONFIRM` code within `ieee80211_tdls_mgmt` (line 1299).  This strongly suggests that it's a locally triggered event.

But just to be absolutely sure, I need to check where `ieee80211_tdls_mgmt` is actually called. It’s the `tdls_mgmt` operation in `cfg80211_ops`, and is called from `rdev_tdls_mgmt` in `net/wireless/rdev-ops.h`, which is itself called from `nl80211_tdls_mgmt` in `net/wireless/nl80211.c`. So it looks like `nl80211_tdls_mgmt` is the ultimate trigger. Just to confirm my analysis, I need to run a `codesearch-find-references` for `ieee80211_tdls_mgmt` to ensure I haven't missed anything.

map[Name:ieee80211_tdls_mgmt]

map[References:<nil> TruncatedOutput:false]

gemini-3-flash-preview

							input: 58289
							output: 32
							thoughts: 43
						

Okay, here's my interpretation of that thought process, from an expert's perspective:

**Debugging a Potential Reference in the Wireless Driver**

Right, no direct references are showing up. That's a classic sign. It's almost certainly being accessed indirectly, likely through a struct field. I need to trace this back. The operations are probably defined within the core mac80211 framework, so the first place to look would be `net/mac80211/main.c`, or wherever the operations are declared and managed within that module. Gotta start digging through that code and see how the data is handled.

map[Expression:\.tdls_mgmt = ieee80211_tdls_mgmt]

map[Output:net/mac80211/cfg.c=5556=const struct cfg80211_ops mac80211_config_ops = {
--
net/mac80211/cfg.c-5628-	.tdls_oper = ieee80211_tdls_oper,
net/mac80211/cfg.c:5629:	.tdls_mgmt = ieee80211_tdls_mgmt,
net/mac80211/cfg.c-5630-	.tdls_channel_switch = ieee80211_tdls_channel_switch,
]

gemini-3-flash-preview

							input: 58674
							output: 52
							thoughts: 697
						

**My Analysis of the TDLS Warning**

Okay, let's break this down. It's definitely in `.tdls_mgmt`, which narrows the scope considerably. The warning itself is coming from `ieee80211_tdls_add_setup_cfm_ies`. This function is specifically invoked when a `WLAN_TDLS_SETUP_CONFIRM` frame is being sent. This frame, in turn, is only triggered by userspace, specifically through the `NL80211_CMD_TDLS_MGMT` command. Crucially, that command demands `CAP_NET_ADMIN`. This means a direct, remote attack sending over-the-air frames is *very* unlikely to trigger this, as the kernel itself wouldn't automatically generate that `WLAN_TDLS_SETUP_CONFIRM` frame.

Now, I need to consider a potential `wpa_supplicant` vector. Could we somehow trick it into sending this confirm frame for a bogus station? An attacker might be able to send a malicious TDLS Setup Response, potentially causing `wpa_supplicant` to respond with a Setup Confirm. But, `wpa_supplicant` would only do this if it's already *engaged* in a TDLS setup with that peer, which inherently means that station has already been added to the kernel.

So, the window is specific – the station must be *removed* from the kernel but *not* from `wpa_supplicant`'s internal state. It's a race condition and requires an active `wpa_supplicant`. It's possible, but it's a tight race condition. It seems the syzkaller reproducer is likely a much more direct method for triggering the problem.

I need to re-evaluate the source of the warning. The user mentioned `ieee80211_process_tdls_channel_switch` initially, which caused me to initially follow that thread, but now I know the warning is in `net/mac80211/tdls.c:611`.

Let's look at that code again:

```c
 608:		sta = sta_info_get(sdata, peer);
 609:		ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
 610:	
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
 612:			return;
```

Right. So if `sta` is NULL, that means the `peer` MAC address passed from userspace doesn't have a corresponding `sta_info`. If `ap_sta` is NULL, it means the AP that we are currently associated with doesn't have a `sta_info`. Both conditions are possible if userspace provides a bad MAC address or if the device is in a weird association state. Neither are directly triggerable by a remote attacker.

Wait… what about automated responses? If the attacker sends a TDLS Setup Request, could the *victim* kernel automatically respond? I've not found any code that does that. All TDLS management frames (except potentially channel switch which is the initial problem), appear to be handled by userspace.

I need to quickly verify this by looking at action frame handling. In `net/mac80211/rx.c`, `ieee80211_rx_mgmt` handles management frames, and Action frames are a specific type of management frame.

requested entity does not exist

map[ContextFile:net/mac80211/rx.c IncludeLines:true Name:ieee80211_rx_mgmt]

map[SourceCode: SourceFile:]

gemini-3-flash-preview

							input: 60214
							output: 21
							thoughts: 58
						

Okay, here's my thought process on this.

**Investigating Action Frame Handling in mac80211**

Right, so I need to figure out where these Action frames are being processed. My initial instinct is to check the typical receive path, perhaps looking at something like `ieee80211_rx_control` or a function with a similar name, something that handles the low-level reception. But, that's not always the best place to start when dealing with management frames.

Thinking about it more, Action frames are often dealt with by the MAC layer management entity, the MLME. So, it's very likely they'll be processed within `net/mac80211/mlme.c`. That file's a likely candidate.

Okay, let's just make sure, a quick search for `WLAN_STYPE_ACTION` within the codebase should zero in on the relevant code quickly. That'll let me pinpoint the exact functions responsible for handling this specific type of frame. Now I can dive into the details.

no matches

map[Expression:WLAN_STYPE_ACTION]

map[Output:]

gemini-3-flash-preview

							input: 60535
							output: 25
							thoughts: 14
						

Okay, here's my attempt at summarizing the thought process, as if it were my own, assuming the user is an expert.

**Considering IEEE 802.11 Action Frames**

Right, let's see. My immediate thought is to consider using `IEEE80211_STYPE_ACTION`. When dealing with this level of wireless network interaction, that's almost always the starting point, isn't it? It's the standard for action frames, which, depending on the implementation details and context, opens the door to a wide range of possibilities for management, control, and extension of the 802.11 protocol itself. I should be able to dig into the relevant 802.11 documentation to nail down what exact action frames are relevant to the problem I'm trying to solve. From there, it's just a matter of figuring out what I can do with it.

map[Expression:IEEE80211_STYPE_ACTION]

map[Output:
Full output is too long, showing 500 out of 603 lines.
Use more precise expression if possible.

[drivers/net/wireless/ath/ath6kl/cfg80211.c=3409=ath6kl_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3410-	[NL80211_IFTYPE_STATION] = {
 drivers/net/wireless/ath/ath6kl/cfg80211.c:3411:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3412-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/ath/ath6kl/cfg80211.c:3413:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3414-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3416-	[NL80211_IFTYPE_AP] = {
 drivers/net/wireless/ath/ath6kl/cfg80211.c:3417:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3418-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/ath/ath6kl/cfg80211.c:3419:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3420-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3422-	[NL80211_IFTYPE_P2P_CLIENT] = {
 drivers/net/wireless/ath/ath6kl/cfg80211.c:3423:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3424-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/ath/ath6kl/cfg80211.c:3425:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3426-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3428-	[NL80211_IFTYPE_P2P_GO] = {
 drivers/net/wireless/ath/ath6kl/cfg80211.c:3429:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3430-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/ath/ath6kl/cfg80211.c:3431:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/ath6kl/cfg80211.c-3432-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/ath/wil6210/cfg80211.c=273=wil_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 drivers/net/wireless/ath/wil6210/cfg80211.c-274-	[NL80211_IFTYPE_STATION] = {
 drivers/net/wireless/ath/wil6210/cfg80211.c:275:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-276-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/ath/wil6210/cfg80211.c:277:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-278-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/ath/wil6210/cfg80211.c-280-	[NL80211_IFTYPE_AP] = {
 drivers/net/wireless/ath/wil6210/cfg80211.c:281:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-282-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4) |
 --
 drivers/net/wireless/ath/wil6210/cfg80211.c-286-		BIT(IEEE80211_STYPE_REASSOC_RESP >> 4),
 drivers/net/wireless/ath/wil6210/cfg80211.c:287:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-288-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 --
 drivers/net/wireless/ath/wil6210/cfg80211.c-295-	[NL80211_IFTYPE_P2P_CLIENT] = {
 drivers/net/wireless/ath/wil6210/cfg80211.c:296:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-297-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/ath/wil6210/cfg80211.c:298:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-299-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/ath/wil6210/cfg80211.c-301-	[NL80211_IFTYPE_P2P_GO] = {
 drivers/net/wireless/ath/wil6210/cfg80211.c:302:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-303-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/ath/wil6210/cfg80211.c:304:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-305-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/ath/wil6210/cfg80211.c-307-	[NL80211_IFTYPE_P2P_DEVICE] = {
 drivers/net/wireless/ath/wil6210/cfg80211.c:308:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-309-		BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/ath/wil6210/cfg80211.c:310:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/ath/wil6210/cfg80211.c-311-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c=7395=brcmf_txrx_stypes[NUM_NL80211_IFTYPES] = {
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7397-		.tx = 0xffff,
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:7398:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7399-		      BIT(IEEE80211_STYPE_AUTH >> 4) |
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7403-		.tx = 0xffff,
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:7404:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7405-		      BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7414-		      BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:7415:		      BIT(IEEE80211_STYPE_ACTION >> 4)
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7416-	},
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7418-		.tx = 0xffff,
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:7419:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7420-		      BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7429-		      BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c:7430:		      BIT(IEEE80211_STYPE_ACTION >> 4)
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c-7431-	}
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c=1385=int brcmf_p2p_notify_action_frame_rx(struct brcmf_if *ifp,
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c-1413-	brcmf_dbg(INFO, "ifp->vif->mgmt_rx_reg %04x\n", ifp->vif->mgmt_rx_reg);
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c:1414:	mgmt_type = (IEEE80211_STYPE_ACTION & IEEE80211_FCTL_STYPE) >> 4;
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c-1415-	if ((ifp->vif->mgmt_rx_reg & BIT(mgmt_type)) == 0)
 --
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c-1467-	memcpy(mgmt_frame->sa, e->addr, ETH_ALEN);
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c:1468:	mgmt_frame->frame_control = cpu_to_le16(IEEE80211_STYPE_ACTION);
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/p2p.c-1469-	memcpy(mgmt_frame->u.body, frame, mgmt_frame_len);
 --
 drivers/net/wireless/intel/ipw2x00/libipw_rx.c=1520=void libipw_rx_mgt(struct libipw_device *ieee,
 --
 drivers/net/wireless/intel/ipw2x00/libipw_rx.c-1590-
 drivers/net/wireless/intel/ipw2x00/libipw_rx.c:1591:	case IEEE80211_STYPE_ACTION:
 drivers/net/wireless/intel/ipw2x00/libipw_rx.c-1592-		LIBIPW_DEBUG_MGMT("ACTION\n");
 --
 drivers/net/wireless/intel/iwlegacy/debug.c=28=il_update_stats(struct il_priv *il, bool is_tx, __le16 fc, u16 len)
 --
 drivers/net/wireless/intel/iwlegacy/debug.c-71-			break;
 drivers/net/wireless/intel/iwlegacy/debug.c:72:		case cpu_to_le16(IEEE80211_STYPE_ACTION):
 drivers/net/wireless/intel/iwlegacy/debug.c-73-			stats->mgmt[MANAGEMENT_ACTION]++;
 --
 drivers/net/wireless/marvell/mwifiex/cfg80211.c=1743=mwifiex_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1744-	[NL80211_IFTYPE_STATION] = {
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:1745:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1746-		      BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:1747:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1748-		      BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 --
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1750-	[NL80211_IFTYPE_AP] = {
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:1751:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1752-		      BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:1753:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1754-		      BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 --
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1756-	[NL80211_IFTYPE_P2P_CLIENT] = {
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:1757:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1758-		      BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:1759:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1760-		      BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 --
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1762-	[NL80211_IFTYPE_P2P_GO] = {
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:1763:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1764-		      BIT(IEEE80211_STYPE_PROBE_RESP >> 4),
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:1765:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-1766-		      BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 --
 drivers/net/wireless/marvell/mwifiex/cfg80211.c=4697=int mwifiex_register_cfg80211(struct mwifiex_adapter *adapter)
 --
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-4743-			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 drivers/net/wireless/marvell/mwifiex/cfg80211.c:4744:			BIT(IEEE80211_STYPE_ACTION >> 4);
 drivers/net/wireless/marvell/mwifiex/cfg80211.c-4745-		wiphy->mgmt_stypes = adapter->mwifiex_mgmt_stypes;
 --
 drivers/net/wireless/marvell/mwifiex/tdls.c=729=mwifiex_construct_tdls_action_frame(struct mwifiex_private *priv,
 --
 drivers/net/wireless/marvell/mwifiex/tdls.c-749-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 drivers/net/wireless/marvell/mwifiex/tdls.c:750:					  IEEE80211_STYPE_ACTION);
 drivers/net/wireless/marvell/mwifiex/tdls.c-751-
 --
 drivers/net/wireless/marvell/mwifiex/util.c=309=mwifiex_parse_mgmt_packet(struct mwifiex_private *priv, u8 *payload, u16 len,
 --
 drivers/net/wireless/marvell/mwifiex/util.c-318-	switch (stype) {
 drivers/net/wireless/marvell/mwifiex/util.c:319:	case IEEE80211_STYPE_ACTION:
 drivers/net/wireless/marvell/mwifiex/util.c-320-		category = *(payload + sizeof(struct ieee80211_hdr));
 --
 drivers/net/wireless/microchip/wilc1000/cfg80211.c=20=static const struct ieee80211_txrx_stypes
 --
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-22-	[NL80211_IFTYPE_STATION] = {
 drivers/net/wireless/microchip/wilc1000/cfg80211.c:23:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-24-			BIT(IEEE80211_STYPE_AUTH >> 4),
 drivers/net/wireless/microchip/wilc1000/cfg80211.c:25:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-26-			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 --
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-36-			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 drivers/net/wireless/microchip/wilc1000/cfg80211.c:37:			BIT(IEEE80211_STYPE_ACTION >> 4)
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-38-	},
 --
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-40-		.tx = 0xffff,
 drivers/net/wireless/microchip/wilc1000/cfg80211.c:41:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-42-			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 --
 drivers/net/wireless/microchip/wilc1000/cfg80211.c=1265=void wilc_update_mgmt_frame_registrations(struct wiphy *wiphy,
 --
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-1271-	u32 presp_bit = BIT(IEEE80211_STYPE_PROBE_REQ >> 4);
 drivers/net/wireless/microchip/wilc1000/cfg80211.c:1272:	u32 action_bit = BIT(IEEE80211_STYPE_ACTION >> 4);
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-1273-	u32 pauth_bit = BIT(IEEE80211_STYPE_AUTH >> 4);
 --
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-1285-		if (now != prev)
 drivers/net/wireless/microchip/wilc1000/cfg80211.c:1286:			wilc_frame_register(vif, IEEE80211_STYPE_ACTION, now);
 drivers/net/wireless/microchip/wilc1000/cfg80211.c-1287-
 --
 drivers/net/wireless/microchip/wilc1000/hif.c=1727=void wilc_frame_register(struct wilc_vif *vif, u16 frame_type, bool reg)
 --
 drivers/net/wireless/microchip/wilc1000/hif.c-1743-	switch (frame_type) {
 drivers/net/wireless/microchip/wilc1000/hif.c:1744:	case IEEE80211_STYPE_ACTION:
 drivers/net/wireless/microchip/wilc1000/hif.c-1745-		reg_frame.reg_id = WILC_FW_ACTION_FRM_IDX;
 --
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c=54=qtnf_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c-55-	[NL80211_IFTYPE_STATION] = {
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c:56:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c-57-		      BIT(IEEE80211_STYPE_AUTH >> 4),
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c:58:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c-59-		      BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 --
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c-62-	[NL80211_IFTYPE_AP] = {
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c:63:		.tx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c-64-		      BIT(IEEE80211_STYPE_AUTH >> 4),
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c:65:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c-66-		      BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 --
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c=394=qtnf_update_mgmt_frame_registrations(struct wiphy *wiphy,
 --
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c-417-		{
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c:418:			.mask = BIT(IEEE80211_STYPE_ACTION >> 4),
 drivers/net/wireless/quantenna/qtnfmac/cfg80211.c-419-			.qlink_type = QLINK_MGMT_FRAME_ACTION,
 --
 drivers/net/wireless/realtek/rtlwifi/base.c=2387=static struct sk_buff *rtl_make_smps_action(struct ieee80211_hw *hw,
 --
 drivers/net/wireless/realtek/rtlwifi/base.c-2405-	action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 drivers/net/wireless/realtek/rtlwifi/base.c:2406:						  IEEE80211_STYPE_ACTION);
 drivers/net/wireless/realtek/rtlwifi/base.c-2407-	action_frame->u.action.category = WLAN_CATEGORY_HT;
 --
 drivers/net/wireless/realtek/rtlwifi/base.c=2514=struct sk_buff *rtl_make_del_ba(struct ieee80211_hw *hw,
 --
 drivers/net/wireless/realtek/rtlwifi/base.c-2532-	action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 drivers/net/wireless/realtek/rtlwifi/base.c:2533:						  IEEE80211_STYPE_ACTION);
 drivers/net/wireless/realtek/rtlwifi/base.c-2534-	action_frame->u.action.category = WLAN_CATEGORY_BACK;
 --
 drivers/net/wireless/realtek/rtw89/fw.c=2851=static struct sk_buff *rtw89_sa_query_get(struct rtw89_dev *rtwdev,
 --
 drivers/net/wireless/realtek/rtw89/fw.c-2865-	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 drivers/net/wireless/realtek/rtw89/fw.c:2866:					 IEEE80211_STYPE_ACTION |
 drivers/net/wireless/realtek/rtw89/fw.c-2867-					 IEEE80211_FCTL_PROTECTED);
 --
 drivers/staging/rtl8723bs/core/rtw_ieee80211.c=1116=int rtw_action_frame_parse(const u8 *frame, u32 frame_len, u8 *category, u8 *action)
 --
 drivers/staging/rtl8723bs/core/rtw_ieee80211.c-1125-	if ((fc & (IEEE80211_FCTL_FTYPE|IEEE80211_FCTL_STYPE))
 drivers/staging/rtl8723bs/core/rtw_ieee80211.c:1126:		!= (IEEE80211_FTYPE_MGMT|IEEE80211_STYPE_ACTION)
 drivers/staging/rtl8723bs/core/rtw_ieee80211.c-1127-	) {
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=149=rtw_cfg80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-151-		.tx = 0xffff,
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:152:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4)
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-153-	},
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-155-		.tx = 0xffff,
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:156:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-157-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-166-		BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:167:		BIT(IEEE80211_STYPE_ACTION >> 4)
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-168-	},
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-177-		BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:178:		BIT(IEEE80211_STYPE_ACTION >> 4)
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-179-	},
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-181-		.tx = 0xffff,
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:182:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-183-		BIT(IEEE80211_STYPE_PROBE_REQ >> 4)
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-192-		BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:193:		BIT(IEEE80211_STYPE_ACTION >> 4)
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-194-	},
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c=1994=static netdev_tx_t rtw_cfg80211_monitor_if_xmit_entry(struct sk_buff *skb, struct net_device *ndev)
 --
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2055-	} else if ((frame_control & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c:2056:		   (IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION)) {
 drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c-2057-		/* only for action frames */
 --
 include/linux/ieee80211.h-76-#define IEEE80211_STYPE_DEAUTH		0x00C0
 include/linux/ieee80211.h:77:#define IEEE80211_STYPE_ACTION		0x00D0
 include/linux/ieee80211.h-78-
 --
 include/linux/ieee80211.h=630=static inline bool ieee80211_is_deauth(__le16 fc)
 --
 include/linux/ieee80211.h-636-/**
 include/linux/ieee80211.h:637: * ieee80211_is_action - check if IEEE80211_FTYPE_MGMT && IEEE80211_STYPE_ACTION
 include/linux/ieee80211.h-638- * @fc: frame control bytes in little-endian byteorder
 --
 include/linux/ieee80211.h=641=static inline bool ieee80211_is_action(__le16 fc)
 --
 include/linux/ieee80211.h-643-	return (fc & cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) ==
 include/linux/ieee80211.h:644:	       cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION);
 include/linux/ieee80211.h-645-}
 --
 net/mac80211/agg-rx.c=196=u8 ieee80211_retrieve_addba_ext_data(struct sta_info *sta,
 --
 net/mac80211/agg-rx.c-210-				       IEEE80211_FTYPE_MGMT |
 net/mac80211/agg-rx.c:211:				       IEEE80211_STYPE_ACTION,
 net/mac80211/agg-rx.c-212-				       NULL);
 --
 net/mac80211/cfg.c=4526=ieee80211_update_mgmt_frame_registrations(struct wiphy *wiphy,
 --
 net/mac80211/cfg.c-4532-	u32 preq_mask = BIT(IEEE80211_STYPE_PROBE_REQ >> 4);
 net/mac80211/cfg.c:4533:	u32 action_mask = BIT(IEEE80211_STYPE_ACTION >> 4);
 net/mac80211/cfg.c-4534-	bool global_change, intf_change;
 --
 net/mac80211/eht.c=108=ieee80211_send_eml_op_mode_notif(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/eht.c-123-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/eht.c:124:					  IEEE80211_STYPE_ACTION);
 net/mac80211/eht.c-125-	memcpy(mgmt->da, req->sa, ETH_ALEN);
 --
 net/mac80211/ht.c=523=int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/ht.c-543-	action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/ht.c:544:						  IEEE80211_STYPE_ACTION);
 net/mac80211/ht.c-545-	action_frame->u.action.category = WLAN_CATEGORY_HT;
 --
 net/mac80211/ibss.c=1580=void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/ibss.c-1610-		break;
 net/mac80211/ibss.c:1611:	case IEEE80211_STYPE_ACTION:
 net/mac80211/ibss.c-1612-		switch (mgmt->u.action.category) {
 --
 net/mac80211/ibss.c-1623-						       IEEE80211_FTYPE_MGMT |
 net/mac80211/ibss.c:1624:						       IEEE80211_STYPE_ACTION,
 net/mac80211/ibss.c-1625-						       NULL);
 --
 net/mac80211/ieee80211_i.h=2223=ieee80211_mgmt_ba(struct sk_buff *skb, const u8 *da,
 --
 net/mac80211/ieee80211_i.h-2240-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/ieee80211_i.h:2241:					  IEEE80211_STYPE_ACTION);
 net/mac80211/ieee80211_i.h-2242-	return mgmt;
 --
 net/mac80211/main.c=670=ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
 --
 net/mac80211/main.c-672-		.tx = 0xffff,
 net/mac80211/main.c:673:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 net/mac80211/main.c-674-			BIT(IEEE80211_STYPE_AUTH >> 4) |
 --
 net/mac80211/main.c-691-		 */
 net/mac80211/main.c:692:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 net/mac80211/main.c-693-			BIT(IEEE80211_STYPE_AUTH >> 4) |
 --
 net/mac80211/main.c-703-			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 net/mac80211/main.c:704:			BIT(IEEE80211_STYPE_ACTION >> 4),
 net/mac80211/main.c-705-	},
 --
 net/mac80211/main.c-714-			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 net/mac80211/main.c:715:			BIT(IEEE80211_STYPE_ACTION >> 4),
 net/mac80211/main.c-716-	},
 --
 net/mac80211/main.c-718-		.tx = 0xffff,
 net/mac80211/main.c:719:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 net/mac80211/main.c-720-			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
 --
 net/mac80211/main.c-729-			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
 net/mac80211/main.c:730:			BIT(IEEE80211_STYPE_ACTION >> 4),
 net/mac80211/main.c-731-	},
 --
 net/mac80211/main.c-733-		.tx = 0xffff,
 net/mac80211/main.c:734:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 net/mac80211/main.c-735-			BIT(IEEE80211_STYPE_AUTH >> 4) |
 --
 net/mac80211/main.c-743-		 */
 net/mac80211/main.c:744:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 net/mac80211/main.c-745-			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
 --
 net/mac80211/main.c-749-		.tx = 0xffff,
 net/mac80211/main.c:750:		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
 net/mac80211/main.c-751-			BIT(IEEE80211_STYPE_AUTH >> 4),
 --
 net/mac80211/mesh.c=1614=static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mesh.c-1632-				       IEEE80211_FTYPE_MGMT |
 net/mac80211/mesh.c:1633:				       IEEE80211_STYPE_ACTION,
 net/mac80211/mesh.c-1634-				       NULL);
 --
 net/mac80211/mesh.c=1694=void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mesh.c-1718-		break;
 net/mac80211/mesh.c:1719:	case IEEE80211_STYPE_ACTION:
 net/mac80211/mesh.c-1720-		ieee80211_mesh_rx_mgmt_action(sdata, mgmt, skb->len, rx_status);
 --
 net/mac80211/mesh_hwmp.c=100=static int mesh_path_sel_frame_tx(enum mpath_frame_type action, u8 flags,
 --
 net/mac80211/mesh_hwmp.c-122-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/mesh_hwmp.c:123:					  IEEE80211_STYPE_ACTION);
 net/mac80211/mesh_hwmp.c-124-
 --
 net/mac80211/mesh_hwmp.c=236=int mesh_path_error_tx(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mesh_hwmp.c-260-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/mesh_hwmp.c:261:					  IEEE80211_STYPE_ACTION);
 net/mac80211/mesh_hwmp.c-262-
 --
 net/mac80211/mesh_hwmp.c=932=void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mesh_hwmp.c-955-				       IEEE80211_FTYPE_MGMT |
 net/mac80211/mesh_hwmp.c:956:				       IEEE80211_STYPE_ACTION,
 net/mac80211/mesh_hwmp.c-957-				       NULL);
 --
 net/mac80211/mesh_plink.c=213=static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mesh_plink.c-257-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/mesh_plink.c:258:					  IEEE80211_STYPE_ACTION);
 net/mac80211/mesh_plink.c-259-	memcpy(mgmt->da, da, ETH_ALEN);
 --
 net/mac80211/mesh_plink.c=1219=void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mesh_plink.c-1252-				       IEEE80211_FTYPE_MGMT |
 net/mac80211/mesh_plink.c:1253:				       IEEE80211_STYPE_ACTION,
 net/mac80211/mesh_plink.c-1254-				       NULL);
 --
 net/mac80211/mlme.c=1302=static int ieee80211_config_bw(struct ieee80211_link_data *link,
 --
 net/mac80211/mlme.c-1325-		break;
 net/mac80211/mlme.c:1326:	case IEEE80211_STYPE_ACTION:
 net/mac80211/mlme.c-1327-		/* the only action frame that gets here */
 --
 net/mac80211/mlme.c=7896=ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mlme.c-7913-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:7914:					  IEEE80211_STYPE_ACTION);
 net/mac80211/mlme.c-7915-	memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
 --
 net/mac80211/mlme.c=7964=ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mlme.c-7983-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:7984:					  IEEE80211_STYPE_ACTION);
 net/mac80211/mlme.c-7985-	memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
 --
 net/mac80211/mlme.c=8095=void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mlme.c-8114-				       IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:8115:				       IEEE80211_STYPE_ACTION,
 net/mac80211/mlme.c-8116-				       NULL);
 --
 net/mac80211/mlme.c=8209=void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif)
 --
 net/mac80211/mlme.c-8225-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:8226:					  IEEE80211_STYPE_ACTION);
 net/mac80211/mlme.c-8227-	memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
 --
 net/mac80211/mlme.c=8263=void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mlme.c-8306-		break;
 net/mac80211/mlme.c:8307:	case IEEE80211_STYPE_ACTION:
 net/mac80211/mlme.c-8308-		if (!sdata->u.mgd.associated ||
 --
 net/mac80211/mlme.c-8324-						       IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:8325:						       IEEE80211_STYPE_ACTION,
 net/mac80211/mlme.c-8326-						       NULL);
 --
 net/mac80211/mlme.c-8355-						       IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:8356:						       IEEE80211_STYPE_ACTION,
 net/mac80211/mlme.c-8357-						       NULL);
 --
 net/mac80211/mlme.c=10574=ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mlme.c-10669-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:10670:					  IEEE80211_STYPE_ACTION);
 net/mac80211/mlme.c-10671-	memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
 --
 net/mac80211/mlme.c=11050=int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable)
 --
 net/mac80211/mlme.c-11077-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:11078:					  IEEE80211_STYPE_ACTION);
 net/mac80211/mlme.c-11079-	memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN);
 --
 net/mac80211/mlme.c=11104=static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mlme.c-11155-						    IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:11156:						    IEEE80211_STYPE_ACTION,
 net/mac80211/mlme.c-11157-						    NULL);
 --
 net/mac80211/mlme.c=11170=void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/mlme.c-11209-				       IEEE80211_FTYPE_MGMT |
 net/mac80211/mlme.c:11210:				       IEEE80211_STYPE_ACTION,
 net/mac80211/mlme.c-11211-				       NULL);
 --
 net/mac80211/parse.c=297=_ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
 --
 net/mac80211/parse.c-321-	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON:
 net/mac80211/parse.c:322:	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION:
 net/mac80211/parse.c-323-	case IEEE80211_FTYPE_EXT | IEEE80211_STYPE_S1G_BEACON:
 --
 net/mac80211/parse.c-607-			if (params->type != (IEEE80211_FTYPE_MGMT |
 net/mac80211/parse.c:608:					     IEEE80211_STYPE_ACTION)) {
 net/mac80211/parse.c-609-				elem_parse_failed =
 --
 net/mac80211/parse.c-624-			if (params->type == (IEEE80211_FTYPE_MGMT |
 net/mac80211/parse.c:625:					     IEEE80211_STYPE_ACTION)) {
 net/mac80211/parse.c-626-				elem_parse_failed =
 --
 net/mac80211/rx.c=3406=static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/rx.c-3439-	resp->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/rx.c:3440:					  IEEE80211_STYPE_ACTION);
 net/mac80211/rx.c-3441-	skb_put(skb, 1 + sizeof(resp->u.action.u.sa_query));
 --
 net/mac80211/s1g.c=34=ieee80211_s1g_send_twt_setup(struct ieee80211_sub_if_data *sdata, const u8 *da,
 --
 net/mac80211/s1g.c-48-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/s1g.c:49:					  IEEE80211_STYPE_ACTION);
 net/mac80211/s1g.c-50-	memcpy(mgmt->da, da, ETH_ALEN);
 --
 net/mac80211/s1g.c=65=ieee80211_s1g_send_twt_teardown(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/s1g.c-80-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/s1g.c:81:					  IEEE80211_STYPE_ACTION);
 net/mac80211/s1g.c-82-	memcpy(mgmt->da, da, ETH_ALEN);
 --
 net/mac80211/spectmgmt.c=403=static void ieee80211_send_refuse_measurement_request(struct ieee80211_sub_if_data *sdata,
 --
 net/mac80211/spectmgmt.c-422-	msr_report->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/spectmgmt.c:423:						IEEE80211_STYPE_ACTION);
 net/mac80211/spectmgmt.c-424-
 --
 net/mac80211/tdls.c=874=ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev,
 --
 net/mac80211/tdls.c-886-	mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
 net/mac80211/tdls.c:887:					  IEEE80211_STYPE_ACTION);
 net/mac80211/tdls.c-888-
 --
]
]

gemini-3-flash-preview

							input: 76710
							output: 58
							thoughts: 1176
						

**Analyzing the TDLS Management Frame Vulnerability**

Okay, let's break this down. My initial thought is that most TDLS management frames, outside of channel switches, aren't handled directly in the kernel. They are passed up to userspace. I'm seeing `ieee80211_prep_tdls_direct` in `net/mac80211/tdls.c`, which is used for `WLAN_PUB_ACTION_TDLS_DISCOVER_RES` and called from `ieee80211_tdls_build_mgmt_packet_data`. This gives me confidence that this specific warning is triggered by `NL80211_CMD_TDLS_MGMT`.

The core question is, can a remote attacker trigger this warning by just sending a TDLS frame over the air? The answer is no, because:

1.  The warning happens within `ieee80211_tdls_add_setup_cfm_ies`.
2.  This function is only called when constructing a `WLAN_TDLS_SETUP_CONFIRM` frame.
3.  The kernel builds this frame *only* when requested by userspace via `NL80211_CMD_TDLS_MGMT`.
4.  Received TDLS frames (aside from channel switches) are passed to userspace; they don't automatically trigger any internal kernel function that would call this specific function.
5.  Even if userspace responds, it would normally have the station information, thus preventing the warning.
6.  The warning fires when station information is missing, which is exactly what the Syzkaller reproducer does by calling the command with a random MAC address.

Now, I'm thinking, let's make sure there aren't other ways `sta` or `ap_sta` could be NULL. Specifically, if `sta_info_get` fails. `sta_info_get` fails if the station isn't in `sdata->sta_list`.

If a remote attacker sends a TDLS frame, it doesn't automatically create a `sta_info` entry in the kernel. `sta_info` is created by either `NL80211_CMD_NEW_STATION` or by the kernel when a station associates (in AP mode). In station mode, the AP `sta_info` is created during association. TDLS peers need to be explicitly added by userspace.

Therefore, if userspace hasn't added the peer, `sta` will be NULL. The kernel won't send a TDLS frame to a peer it doesn't know about, unless asked by userspace (which is what `NL80211_CMD_TDLS_MGMT` does).

Okay, let's double-check if `ieee80211_tdls_add_setup_cfm_ies` uses `ap_sta` for anything else. Yes, it uses `ap_sta->sta.deflink.ht_cap.ht_supported`. If `ap_sta` is NULL, this would crash if not for the `WARN_ON_ONCE` and `return`. So the warning is specifically there to prevent a crash when the station info is missing.

**Conclusion:**

The vulnerability is a missing check in `ieee80211_tdls_mgmt` (or more likely, `ieee80211_tdls_prep_mgmt_packet`) to ensure the station exists before building the packet for `WLAN_TDLS_SETUP_CONFIRM`. Other action codes like `WLAN_TDLS_SETUP_REQUEST` and `WLAN_TDLS_SETUP_RESPONSE` *do* have this check in `ieee80211_tdls_mgmt_setup`.

Specifically, the vulnerability lies in the fact that `WLAN_TDLS_SETUP_CONFIRM` is handled in the `default` case of the switch within `ieee80211_tdls_mgmt`. This is the problematic part:

```c
1296:		case WLAN_TDLS_SETUP_CONFIRM:
1297:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1298:			/* no special handling */
1299:			ret = ieee80211_tdls_prep_mgmt_packet(...);
```

It should include a station existence check here, similar to other cases.

Wait, what about `WLAN_TDLS_TEARDOWN`?
```c
1281:		case WLAN_TDLS_TEARDOWN:
1282:			ret = ie

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_mgmt_teardown]

map[SourceCode:1206:	static int
1207:	ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
1208:				     const u8 *peer, int link_id,
1209:				     u8 action_code, u8 dialog_token,
1210:				     u16 status_code, u32 peer_capability,
1211:				     bool initiator, const u8 *extra_ies,
1212:				     size_t extra_ies_len)
1213:	{
1214:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1215:		struct ieee80211_local *local = sdata->local;
1216:		struct sta_info *sta;
1217:		int ret;
1218:	
1219:		/*
1220:		 * No packets can be transmitted to the peer via the AP during setup -
1221:		 * the STA is set as a TDLS peer, but is not authorized.
1222:		 * During teardown, we prevent direct transmissions by stopping the
1223:		 * queues and flushing all direct packets.
1224:		 */
1225:		ieee80211_stop_vif_queues(local, sdata,
1226:					  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);
1227:		ieee80211_flush_queues(local, sdata, false);
1228:	
1229:		ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
1230:						      link_id, action_code,
1231:						      dialog_token, status_code,
1232:						      peer_capability, initiator,
1233:						      extra_ies, extra_ies_len, 0,
1234:						      NULL);
1235:		if (ret < 0)
1236:			sdata_err(sdata, "Failed sending TDLS teardown packet %d\n",
1237:				  ret);
1238:	
1239:		/*
1240:		 * Remove the STA AUTH flag to force further traffic through the AP. If
1241:		 * the STA was unreachable, it was already removed.
1242:		 */
1243:		rcu_read_lock();
1244:		sta = sta_info_get(sdata, peer);
1245:		if (sta)
1246:			clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
1247:		rcu_read_unlock();
1248:	
1249:		ieee80211_wake_vif_queues(local, sdata,
1250:					  IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN);
1251:	
1252:		return 0;
1253:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 79842
							output: 58
							thoughts: 268
						

**Analyzing TDLS Management Frame Preparation**

Okay, so I'm diving into this TDLS code again. My immediate observation is that the logic for preparing management packets is a little inconsistent. Specifically, it doesn't seem to have a check to ensure that the `sta` exists before calling `ieee80211_tdls_prep_mgmt_packet`. That could potentially lead to problems.

However, the handling of `WLAN_TDLS_TEARDOWN` in `ieee80211_tdls_add_ies` is noticeably different. The code adds the extra IEs, and then conditionally calls `ieee80211_tdls_add_link_ie` depending on the `status_code` or `action_code`. I see that `ieee80211_tdls_add_link_ie` is the function responsible for adding the link IEs. I need to understand that logic better, so I'll go ahead and check that function next.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_link_ie]

map[SourceCode: 203:	static void ieee80211_tdls_add_link_ie(struct ieee80211_link_data *link,
 204:					       struct sk_buff *skb, const u8 *peer,
 205:					       bool initiator)
 206:	{
 207:		struct ieee80211_sub_if_data *sdata = link->sdata;
 208:		struct ieee80211_tdls_lnkie *lnkid;
 209:		const u8 *init_addr, *rsp_addr;
 210:	
 211:		if (initiator) {
 212:			init_addr = sdata->vif.addr;
 213:			rsp_addr = peer;
 214:		} else {
 215:			init_addr = peer;
 216:			rsp_addr = sdata->vif.addr;
 217:		}
 218:	
 219:		lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie));
 220:	
 221:		lnkid->ie_type = WLAN_EID_LINK_ID;
 222:		lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2;
 223:	
 224:		memcpy(lnkid->bssid, link->u.mgd.bssid, ETH_ALEN);
 225:		memcpy(lnkid->init_sta, init_addr, ETH_ALEN);
 226:		memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN);
 227:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 80885
							output: 768
							thoughts: 252
						

**My Analysis of the TDLS Warning**

Okay, so I've pinned down the source of this warning. It's not in the code paths dealing with `WLAN_TDLS_TEARDOWN`, thankfully. That's a good starting point. Instead, it's triggered specifically by `WLAN_TDLS_SETUP_CONFIRM`. The core of the issue is buried within `ieee80211_tdls_add_setup_cfm_ies`.

The warning fires when either the `sta` or `ap_sta` pointers are null within that function. This happens when the kernel receives a `NL80211_CMD_TDLS_MGMT` command with the `action_code` set to `WLAN_TDLS_SETUP_CONFIRM`. Crucially, it only triggers if the peer device hasn't already been registered or doesn't exist within the kernel's station information database.

The good news is that this is a *local* trigger. An attacker needs `CAP_NET_ADMIN` privileges to inject this kind of command. Furthermore, it's not remotely triggerable, as the kernel doesn't automatically send this kind of frame. Therefore, the risk is minimal. I've got a comprehensive picture of the issue.

gemini-3.1-pro-preview

							input: 92036
							output: 66
							thoughts: 0
						

map[DenialOfService:false Exploitable:false FilesystemTrigger:false NetworkTrigger:false PeripheralTrigger:false RemoteTrigger:false Unprivileged:false UserNamespace:true VMGuestTrigger:false VMHostTrigger:false]

map[DenialOfService:false Exploitable:false FilesystemTrigger:false NetworkTrigger:false PeripheralTrigger:false RemoteTrigger:false Unprivileged:false UserNamespace:true VMGuestTrigger:false VMHostTrigger:false]

gemini-3.1-pro-preview

							input: 92166
							output: 379
							thoughts: 0
						

map[Question:Wait, the syzkaller reproducer does not use NL80211_CMD_TDLS_MGMT.
It uses:
1. NL80211_CMD_SET_INTERFACE
2. NL80211_CMD_CONNECT
3. syz_80211_inject_frame
4. syz_80211_inject_frame
5. syz_80211_inject_frame
6. NL80211_CMD_TDLS_MGMT

Ah, it does use NL80211_CMD_TDLS_MGMT.
Let me check the reproducer again.
Yes, it uses NL80211_CMD_TDLS_MGMT.

So the bug is triggered by a local user with CAP_NET_ADMIN in the user namespace.
Is it possible to trigger it without CAP_NET_ADMIN?
No, because NL80211_CMD_TDLS_MGMT requires GENL_UNS_ADMIN_PERM, which means CAP_NET_ADMIN in the user namespace.

Is it exploitable?
The warning is:
WARN_ON_ONCE(!sta || !ap_sta)
If the warning is triggered, the function returns early.
There is no memory corruption.
It is just a benign warning.

So the results are:
Exploitable: false
DenialOfService: false
Unprivileged: false
UserNamespace: true
VMGuestTrigger: false
VMHostTrigger: false
NetworkTrigger: false
RemoteTrigger: false
PeripheralTrigger: false
FilesystemTrigger: false

I will provide the final reasoning.]

map[Answer:The bug is a `WARN_ON_ONCE` in the function `ieee80211_tdls_add_setup_cfm_ies` located in `net/mac80211/tdls.c`. This warning is triggered when the kernel attempts to build a TDLS (Tunneled Direct Link Setup) Setup Confirm frame but finds that the station information (`sta_info`) for either the peer or the associated Access Point (AP) is missing.

### Analysis of the Trigger
The vulnerability is triggered via the `NL80211_CMD_TDLS_MGMT` netlink command. When this command is called with the action code `WLAN_TDLS_SETUP_CONFIRM`, the mac80211 stack proceeds to build a management packet. Unlike other TDLS setup steps (Request/Response), the code path for `WLAN_TDLS_SETUP_CONFIRM` in `ieee80211_tdls_mgmt()` and `ieee80211_tdls_prep_mgmt_packet()` does not verify if the peer station has been correctly initialized and added to the internal station list. Consequently, it reaches `ieee80211_tdls_add_setup_cfm_ies()`, where the following check fails:

```c
sta = sta_info_get(sdata, peer);
ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);

if (WARN_ON_ONCE(!sta || !ap_sta))
    return;
```

### Security Assessment
*   **Privileges**: The `NL80211_CMD_TDLS_MGMT` command is protected by the `GENL_UNS_ADMIN_PERM` flag, meaning it requires `CAP_NET_ADMIN` privileges. While these privileges can be acquired within a user namespace, the command is still considered privileged.
*   **Impact**: The bug results in a kernel warning (`WARN_ON_ONCE`) and an early return from the function. There is no memory corruption, use-after-free, or out-of-bounds access. The `WARN_ON_ONCE` ensures that the system log is not flooded, as it only triggers once per boot.
*   **Exploitability**: The bug is not exploitable for privilege escalation or arbitrary code execution. It is a benign warning that correctly handles the missing state by aborting the operation.
*   **Denial of Service**: It does not cause a system crash or significant resource exhaustion. Even if `panic_on_warn` is enabled, the requirement for `CAP_NET_ADMIN` mitigates the risk as a DoS vector.

### Conclusion
The bug is a minor logic error in state validation that leads to a harmless kernel warning. It requires local administrative privileges (or `CAP_NET_ADMIN` in a user namespace) to trigger.

**Final Results:**
- **Exploitable**: false
- **DenialOfService**: false
- **Unprivileged**: false
- **UserNamespace**: true
- **VMGuestTrigger**: false
- **VMHostTrigger**: false
- **NetworkTrigger**: false
- **RemoteTrigger**: false
- **PeripheralTrigger**: false
- **FilesystemTrigger**: false]

gemini-3-flash-preview

You are a capable Linux kernel developer tasked with researching complex questions
about kernel source code. You will be given a concrete question, and need to provide
a concrete answer.
Use tools extensively while researching the question. Don't make assumptions,
or rely on your previous knowledge about the kernel source code, use available tools
to access the actual source code.
Use all available sources of information:
 - kernel source code
 - documentation in the Documentation dir in the source tree
 - git commits descriptions, git blame

Prefer calling several tools at the same time to save round-trips.

Wait, the syzkaller reproducer does not use NL80211_CMD_TDLS_MGMT.
It uses:
1. NL80211_CMD_SET_INTERFACE
2. NL80211_CMD_CONNECT
3. syz_80211_inject_frame
4. syz_80211_inject_frame
5. syz_80211_inject_frame
6. NL80211_CMD_TDLS_MGMT

Ah, it does use NL80211_CMD_TDLS_MGMT.
Let me check the reproducer again.
Yes, it uses NL80211_CMD_TDLS_MGMT.

So the bug is triggered by a local user with CAP_NET_ADMIN in the user namespace.
Is it possible to trigger it without CAP_NET_ADMIN?
No, because NL80211_CMD_TDLS_MGMT requires GENL_UNS_ADMIN_PERM, which means CAP_NET_ADMIN in the user namespace.

Is it exploitable?
The warning is:
WARN_ON_ONCE(!sta || !ap_sta)
If the warning is triggered, the function returns early.
There is no memory corruption.
It is just a benign warning.

So the results are:
Exploitable: false
DenialOfService: false
Unprivileged: false
UserNamespace: true
VMGuestTrigger: false
VMHostTrigger: false
NetworkTrigger: false
RemoteTrigger: false
PeripheralTrigger: false
FilesystemTrigger: false

I will provide the final reasoning.

The bug is a `WARN_ON_ONCE` in the function `ieee80211_tdls_add_setup_cfm_ies` located in `net/mac80211/tdls.c`. This warning is triggered when the kernel attempts to build a TDLS (Tunneled Direct Link Setup) Setup Confirm frame but finds that the station information (`sta_info`) for either the peer or the associated Access Point (AP) is missing.

### Analysis of the Trigger
The vulnerability is triggered via the `NL80211_CMD_TDLS_MGMT` netlink command. When this command is called with the action code `WLAN_TDLS_SETUP_CONFIRM`, the mac80211 stack proceeds to build a management packet. Unlike other TDLS setup steps (Request/Response), the code path for `WLAN_TDLS_SETUP_CONFIRM` in `ieee80211_tdls_mgmt()` and `ieee80211_tdls_prep_mgmt_packet()` does not verify if the peer station has been correctly initialized and added to the internal station list. Consequently, it reaches `ieee80211_tdls_add_setup_cfm_ies()`, where the following check fails:

```c
sta = sta_info_get(sdata, peer);
ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);

if (WARN_ON_ONCE(!sta || !ap_sta))
    return;
```

### Security Assessment
*   **Privileges**: The `NL80211_CMD_TDLS_MGMT` command is protected by the `GENL_UNS_ADMIN_PERM` flag, meaning it requires `CAP_NET_ADMIN` privileges. While these privileges can be acquired within a user namespace, the command is still considered privileged.
*   **Impact**: The bug results in a kernel warning (`WARN_ON_ONCE`) and an early return from the function. There is no memory corruption, use-after-free, or out-of-bounds access. The `WARN_ON_ONCE` ensures that the system log is not flooded, as it only triggers once per boot.
*   **Exploitability**: The bug is not exploitable for privilege escalation or arbitrary code execution. It is a benign warning that correctly handles the missing state by aborting the operation.
*   **Denial of Service**: It does not cause a system crash or significant resource exhaustion. Even if `panic_on_warn` is enabled, the requirement for `CAP_NET_ADMIN` mitigates the risk as a DoS vector.

### Conclusion
The bug is a minor logic error in state validation that leads to a harmless kernel warning. It requires local administrative privileges (or `CAP_NET_ADMIN` in a user namespace) to trigger.

**Final Results:**
- **Exploitable**: false
- **DenialOfService**: false
- **Unprivileged**: false
- **UserNamespace**: true
- **VMGuestTrigger**: false
- **VMHostTrigger**: false
- **NetworkTrigger**: false
- **RemoteTrigger**: false
- **PeripheralTrigger**: false
- **FilesystemTrigger**: false

gemini-3-flash-preview

							input: 3561
							output: 30
							thoughts: 226
						

**Analyzing a Linux Kernel Bug Regarding TDLS Management**

Okay, so the user is asking for a final reasoning regarding a potential bug in the Linux kernel related to `NL80211_CMD_TDLS_MGMT` and a `WARN_ON_ONCE`. I need more context to be helpful here. I'm missing the initial conversation. It seems like the user is picking up from where they left off, possibly with a debugging session in progress.

Initially, I see something about a syzkaller reproducer and whether or not it utilizes `NL80211_CMD_TDLS_MGMT`. It seems the user clarified that the reproducer *does* use it, and they concluded that the warning is benign.

Hmm, "benign" is a strong claim. I need to verify that before I accept it. So, first, I'm going to do some research. I'll search the kernel source for both `NL80211_CMD_TDLS_MGMT` and `WARN_ON_ONCE` to get a better handle on the situation.

The user also specifically mentioned `WARN_ON_ONCE(!sta || !ap_sta)`. I need to figure out what `sta` and `ap_sta` refer to in the context of `NL80211_CMD_TDLS_MGMT`. I'll search for that specific warning in the kernel source. Let's see if this narrows things down.

map[Expression:WARN_ON_ONCE\(!sta \|\| !ap_sta\)]

map[Output:net/mac80211/tdls.c=592=ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
--
net/mac80211/tdls.c-610-
net/mac80211/tdls.c:611:	if (WARN_ON_ONCE(!sta || !ap_sta))
net/mac80211/tdls.c-612-		return;
]

gemini-3-flash-preview

							input: 4275
							output: 60
							thoughts: 112
						

**Investigating a TDLS Warning**

Alright, let's dive in. I've tracked down the code containing that warning message I saw – it's right here in `net/mac80211/tdls.c`. The specific lines that jump out are 611 and 612. The code includes a `WARN_ON_ONCE` call, and if either `sta` or `ap_sta` is null, the function simply returns. That's a classic null pointer check, but the `WARN_ON_ONCE` indicates something unexpected is happening. The presence of the warning suggests we want to understand *why* either `sta` or `ap_sta` might be unexpectedly null within this TDLS context. Let's dig into the surrounding code to grasp the sequence of events and the intended state of those variables. I need to understand what led to this state.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_setup_cfm_ies]

map[SourceCode: 591:	static void
 592:	ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
 593:					 struct sk_buff *skb, const u8 *peer,
 594:					 bool initiator, const u8 *extra_ies,
 595:					 size_t extra_ies_len)
 596:	{
 597:		struct ieee80211_sub_if_data *sdata = link->sdata;
 598:		struct ieee80211_local *local = sdata->local;
 599:		size_t offset = 0, noffset;
 600:		struct sta_info *sta, *ap_sta;
 601:		struct ieee80211_supported_band *sband;
 602:		u8 *pos;
 603:	
 604:		sband = ieee80211_get_link_sband(link);
 605:		if (WARN_ON_ONCE(!sband))
 606:			return;
 607:	
 608:		sta = sta_info_get(sdata, peer);
 609:		ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
 610:	
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
 612:			return;
 613:	
 614:		sta->tdls_chandef = link->conf->chanreq.oper;
 615:	
 616:		/* add any custom IEs that go before the QoS IE */
 617:		if (extra_ies_len) {
 618:			static const u8 before_qos[] = {
 619:				WLAN_EID_RSN,
 620:			};
 621:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 622:						     before_qos,
 623:						     ARRAY_SIZE(before_qos),
 624:						     offset);
 625:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 626:			offset = noffset;
 627:		}
 628:	
 629:		/* add the QoS param IE if both the peer and we support it */
 630:		if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
 631:			ieee80211_tdls_add_wmm_param_ie(sdata, skb);
 632:	
 633:		/* add any custom IEs that go before HT operation */
 634:		if (extra_ies_len) {
 635:			static const u8 before_ht_op[] = {
 636:				WLAN_EID_RSN,
 637:				WLAN_EID_QOS_CAPA,
 638:				WLAN_EID_FAST_BSS_TRANSITION,
 639:				WLAN_EID_TIMEOUT_INTERVAL,
 640:			};
 641:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 642:						     before_ht_op,
 643:						     ARRAY_SIZE(before_ht_op),
 644:						     offset);
 645:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 646:			offset = noffset;
 647:		}
 648:	
 649:		/*
 650:		 * if HT support is only added in TDLS, we need an HT-operation IE.
 651:		 * add the IE as required by IEEE802.11-2012 9.23.3.2.
 652:		 */
 653:		if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
 654:			u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
 655:				   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
 656:				   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
 657:	
 658:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
 659:			ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
 660:						   &link->conf->chanreq.oper, prot,
 661:						   true);
 662:		}
 663:	
 664:		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 665:	
 666:		/* only include VHT-operation if not on the 2.4GHz band */
 667:		if (sband->band != NL80211_BAND_2GHZ &&
 668:		    sta->sta.deflink.vht_cap.vht_supported) {
 669:			/*
 670:			 * if both peers support WIDER_BW, we can expand the chandef to
 671:			 * a wider compatible one, up to 80MHz
 672:			 */
 673:			if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 674:				ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 675:	
 676:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
 677:			ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
 678:						    &sta->tdls_chandef);
 679:		}
 680:	
 681:		/* add any remaining IEs */
 682:		if (extra_ies_len) {
 683:			noffset = extra_ies_len;
 684:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 685:		}
 686:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 6462
							output: 36
							thoughts: 121
						

**Analyzing TDLS Setup Confirmation IE Handling**

Okay, so I'm looking at this code and immediately I see `ieee80211_tdls_add_setup_cfm_ies` calls `sta_info_get` twice – once for the peer, and again for the AP address, which comes from the virtual interface's configuration. The important part is that if either of those `sta_info_get` calls results in a `NULL` pointer, we're hitting a `WARN_ON_ONCE` and bailing out. This is a critical check, as we don't want to proceed with invalid station information. The user's reproducer is using `NL80211_CMD_TDLS_MGMT`, so I need to find out where this function is called from within that management command. Understanding the call chain will be the key to understanding this issue. Let's trace back from that function and see what's triggering these `NULL` returns.

map[Name:ieee80211_tdls_add_setup_cfm_ies]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_add_ies SourceFile:net/mac80211/tdls.c SourceLine:762]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 6915
							output: 56
							thoughts: 27
						

Here's my attempt at summarizing the thought process, tailored for an expert audience:

**Analyzing the IEEE 802.11 TDLS IE Addition**

Okay, so I'm looking at this function call, `ieee80211_tdls_add_ies`. Right. That's the entry point. I want to understand exactly how the Information Elements (IEs) for TDLS are getting added. It's the standard entry point for the process, so let's start with a deep dive there and see what we can glean about the architecture. I need to figure out the IEs that are being used, and why.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_add_ies]

map[SourceCode: 741:	static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
 742:					   struct sk_buff *skb, const u8 *peer,
 743:					   u8 action_code, u16 status_code,
 744:					   bool initiator, const u8 *extra_ies,
 745:					   size_t extra_ies_len, u8 oper_class,
 746:					   struct cfg80211_chan_def *chandef)
 747:	{
 748:		switch (action_code) {
 749:		case WLAN_TDLS_SETUP_REQUEST:
 750:		case WLAN_TDLS_SETUP_RESPONSE:
 751:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 752:			if (status_code == 0)
 753:				ieee80211_tdls_add_setup_start_ies(link,
 754:								   skb, peer,
 755:								   action_code,
 756:								   initiator,
 757:								   extra_ies,
 758:								   extra_ies_len);
 759:			break;
 760:		case WLAN_TDLS_SETUP_CONFIRM:
 761:			if (status_code == 0)
 762:				ieee80211_tdls_add_setup_cfm_ies(link, skb, peer,
 763:								 initiator, extra_ies,
 764:								 extra_ies_len);
 765:			break;
 766:		case WLAN_TDLS_TEARDOWN:
 767:		case WLAN_TDLS_DISCOVERY_REQUEST:
 768:			if (extra_ies_len)
 769:				skb_put_data(skb, extra_ies, extra_ies_len);
 770:			if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN)
 771:				ieee80211_tdls_add_link_ie(link, skb,
 772:							   peer, initiator);
 773:			break;
 774:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 775:			ieee80211_tdls_add_chan_switch_req_ies(link, skb, peer,
 776:							       initiator, extra_ies,
 777:							       extra_ies_len,
 778:							       oper_class, chandef);
 779:			break;
 780:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 781:			ieee80211_tdls_add_chan_switch_resp_ies(link, skb, peer,
 782:								status_code,
 783:								initiator, extra_ies,
 784:								extra_ies_len);
 785:			break;
 786:		}
 787:	
 788:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 8004
							output: 32
							thoughts: 34
						

Okay, here's my interpretation of that thought process, tailored for an expert audience, and written in the first person:

**TDLS IE Insertion Flow**

Right, so I'm thinking about the TDLS (Tunneled Direct Link Setup) process and specifically how those Information Elements (IEs) get added. The key point here is the call stack. From what I'm seeing, `ieee80211_tdls_add_ies` is clearly the function responsible for actually attaching the necessary IEs to a frame. The interesting bit, from my perspective, is *where* that call originates.

It appears the top-level handler, the orchestrator if you will, is `ieee80211_tdls_mgmt`. This makes perfect sense; `ieee80211_tdls_mgmt` is logically where all the TDLS management frame processing would be centralized. So, when the system determines IEs need to be included in a TDLS frame, likely based on some state transition or negotiation happening in `ieee80211_tdls_mgmt`, it then calls `ieee80211_tdls_add_ies` to do the actual IE attachment. It's a clean separation of concerns: higher-level logic to manage the TDLS process and a lower-level function to handle the gritty details of crafting the frame. I'd want to examine the conditions within `ieee80211_tdls_mgmt` to understand precisely which scenarios trigger that call to `ieee80211_tdls_add_ies`, as that's where the decision making and policy regarding TDLS IE inclusion likely reside.

map[Name:ieee80211_tdls_add_ies]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_build_mgmt_packet_data SourceFile:net/mac80211/tdls.c SourceLine:984]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 8523
							output: 60
							thoughts: 24
						

Okay, here's my take on those thoughts, tailored for an expert audience, and written as if they were my own:

**Analyzing the IEEE 802.11 TDLS Management Packet Construction**

Alright, let's dive into the `ieee80211_tdls_build_mgmt_packet_data` function, shall we? Immediately, I'm thinking about the nitty-gritty details. This function is absolutely critical, acting as the foundation for TDLS (Tunneled Direct Link Setup) functionality within the 802.11 framework. We know how complex TDLS can be, especially considering the security implications and the need to maintain backward compatibility with legacy devices.

So, I'm already envisioning the packet structure. We have to properly construct those TDLS management frames, encapsulating the necessary information for a direct link setup: the specific TDLS capabilities, the peer's MAC address, the chosen security parameters (WPA/WPA2/WPA3-related information, if applicable), maybe even some vendor-specific data. I wonder if it handles the various TDLS message types correctly – discovery requests, setup requests, responses, teardown frames. Is there proper error handling for malformed requests or unexpected responses?

I'm mentally mapping the function's internal structure. I'm focusing on the buffer management – how efficiently is the memory allocated and deallocated for the packet data? Are we avoiding any potential buffer overflows or memory leaks? We need to ensure that the constructed packets comply precisely with the 802.11 standard, of course, but also any relevant regulatory requirements in various regions.

Beyond the core functionality, I'm curious about the function's interaction with the lower-level MAC layer. Does it handle any necessary header formatting? Are there proper checksum calculations performed, and are these calculations robust enough to handle the potential variability? I'm also thinking about potential optimizations. Can we minimize the number of memory copies, utilize DMA if possible, to reduce processing overhead? And does the function handle any fragmentation or aggregation correctly?

Finally, security is at the forefront of my mind. Is proper cryptographic key derivation and handling embedded in this build function, or is that handled elsewhere in the TDLS framework? Is the generation of nonce and other nonces handled correctly and securely? We need to verify that everything is hardened against potential vulnerabilities. Any flaw here can open the door to all kinds of attack vectors.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_build_mgmt_packet_data]

map[SourceCode: 908:	static struct sk_buff *
 909:	ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
 910:					      const u8 *peer, int link_id,
 911:					      u8 action_code, u8 dialog_token,
 912:					      u16 status_code, bool initiator,
 913:					      const u8 *extra_ies, size_t extra_ies_len,
 914:					      u8 oper_class,
 915:					      struct cfg80211_chan_def *chandef)
 916:	{
 917:		struct ieee80211_local *local = sdata->local;
 918:		struct sk_buff *skb;
 919:		int ret;
 920:		struct ieee80211_link_data *link;
 921:	
 922:		link_id = link_id >= 0 ? link_id : 0;
 923:		rcu_read_lock();
 924:		link = rcu_dereference(sdata->link[link_id]);
 925:		if (WARN_ON(!link))
 926:			goto unlock;
 927:	
 928:		skb = netdev_alloc_skb(sdata->dev,
 929:				       local->hw.extra_tx_headroom +
 930:				       max(sizeof(struct ieee80211_mgmt),
 931:					   sizeof(struct ieee80211_tdls_data)) +
 932:				       50 + /* supported rates */
 933:				       10 + /* ext capab */
 934:				       26 + /* max(WMM-info, WMM-param) */
 935:				       2 + max(sizeof(struct ieee80211_ht_cap),
 936:					       sizeof(struct ieee80211_ht_operation)) +
 937:				       2 + max(sizeof(struct ieee80211_vht_cap),
 938:					       sizeof(struct ieee80211_vht_operation)) +
 939:				       2 + 1 + sizeof(struct ieee80211_he_cap_elem) +
 940:					       sizeof(struct ieee80211_he_mcs_nss_supp) +
 941:					       IEEE80211_HE_PPE_THRES_MAX_LEN +
 942:				       2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
 943:				       2 + 1 + sizeof(struct ieee80211_eht_cap_elem) +
 944:					       sizeof(struct ieee80211_eht_mcs_nss_supp) +
 945:					       IEEE80211_EHT_PPE_THRES_MAX_LEN +
 946:				       50 + /* supported channels */
 947:				       3 + /* 40/20 BSS coex */
 948:				       4 + /* AID */
 949:				       4 + /* oper classes */
 950:				       extra_ies_len +
 951:				       sizeof(struct ieee80211_tdls_lnkie));
 952:		if (!skb)
 953:			goto unlock;
 954:	
 955:		skb_reserve(skb, local->hw.extra_tx_headroom);
 956:	
 957:		switch (action_code) {
 958:		case WLAN_TDLS_SETUP_REQUEST:
 959:		case WLAN_TDLS_SETUP_RESPONSE:
 960:		case WLAN_TDLS_SETUP_CONFIRM:
 961:		case WLAN_TDLS_TEARDOWN:
 962:		case WLAN_TDLS_DISCOVERY_REQUEST:
 963:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 964:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 965:			ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy,
 966:							     sdata->dev, link, peer,
 967:							     action_code, dialog_token,
 968:							     status_code, skb);
 969:			break;
 970:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
 971:			ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev,
 972:							 peer, link, action_code,
 973:							 dialog_token, status_code,
 974:							 skb);
 975:			break;
 976:		default:
 977:			ret = -EOPNOTSUPP;
 978:			break;
 979:		}
 980:	
 981:		if (ret < 0)
 982:			goto fail;
 983:	
 984:		ieee80211_tdls_add_ies(link, skb, peer, action_code, status_code,
 985:				       initiator, extra_ies, extra_ies_len, oper_class,
 986:				       chandef);
 987:		rcu_read_unlock();
 988:		return skb;
 989:	
 990:	fail:
 991:		dev_kfree_skb(skb);
 992:	unlock:
 993:		rcu_read_unlock();
 994:		return NULL;
 995:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 10730
							output: 36
							thoughts: 38
						

Okay, here's my interpretation of those thoughts, framed as my own, given my expertise:

**Diving Deep into TDLS Management Frame Construction**

Alright, so I'm thinking about the intricate dance of TDLS (Tunneled Direct Link Setup) in this 802.11 implementation. I'm focusing specifically on how the management frames are constructed. What's catching my attention is the clear pathway: `ieee80211_tdls_build_mgmt_packet_data` is explicitly called *from* `ieee80211_tdls_mgmt`. This tells me a few critical things.

First, `ieee80211_tdls_mgmt` is the central orchestrator, the function that's responsible for managing the overall TDLS negotiation and state machine. It handles the higher-level logic: initiating, responding, error handling, and so on.

Secondly, `ieee80211_tdls_build_mgmt_packet_data` is clearly a *helper* function. It's responsible for the nitty-gritty details of building the *payload* of the TDLS management frames themselves. This function is likely responsible for assembling the various information elements (IEs), capabilities, and other TDLS-specific data that are included in the management frames. I'd imagine things like the Initiator/Responder MAC addresses, the discovery parameters, and any other protocol-specific TLVs are constructed here.

This division of labor is important from a design perspective. It promotes modularity and makes the code easier to understand and maintain. I can see a clear separation of concerns: one function deals with the TDLS *protocol* flow, while the other handles the frame *encoding*. I would be interested in the various options this function provides, and any custom options.

map[Name:ieee80211_tdls_build_mgmt_packet_data]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_ch_sw_resp_tmpl_get SourceFile:net/mac80211/tdls.c SourceLine:1712] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_ch_sw_tmpl_get SourceFile:net/mac80211/tdls.c SourceLine:1587] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_prep_mgmt_packet SourceFile:net/mac80211/tdls.c SourceLine:1058]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 11421
							output: 58
							thoughts: 22
						

Okay, here's my interpretation of what's going through my mind, written in the first person, as if I'm the one thinking about this function, assuming I'm an expert in the field:

**Diving into `ieee80211_tdls_prep_mgmt_packet`**

Alright, let's get down to brass tacks and dissect `ieee80211_tdls_prep_mgmt_packet`. Right off the bat, I know this is the function responsible for constructing the management frames specifically tailored for TDLS operations. So, we're talking about frames that initiate, maintain, or tear down direct links between stations, bypassing the AP in the process, which, of course, is the whole point of TDLS.

I'm instantly thinking about the various TDLS message types this function likely has to handle. There's the setup phase - that'll involve things like Discover, Setup Request, Setup Response, maybe even teardown, and Teardown Request, Teardown Response. I'm imagining it'll have to deal with building the proper IE’s (Information Elements) - the TDLS Capabilities IE, the peer address, the Dialog Token, and so on. We're getting into crafting the frame bodies, making sure everything is compliant with the standard.

I'm also considering the security aspects. TDLS is tricky from a security perspective. It usually needs something like WPA/WPA2 or even WPA3 to have pre-existing security set up between the communicating devices. I'm wondering how this function manages key derivation or key confirmation or the selection of the correct security suite for the connection. I need to be sure the function handles all those security nuances correctly.

I'm curious about the function's internal structure. I'm betting there's a switch statement or some kind of dispatch mechanism in there, probably based on the TDLS action code or maybe a combination of the subtype and the action code of the frame being prepared. It needs to handle a variety of states and possibilities. It'll require me to parse the various incoming parameters passed to it - peer MAC addresses, any negotiated parameters, security keys, all the data needed to formulate these frames correctly.

I anticipate the function's output will be a properly formatted 802.11 management frame, ready to be transmitted, and probably an associated control structure containing all the metadata related to this constructed frame. I need to be sure it sets the right frame control fields, ensures the sequence numbers are properly managed, and gets the frame length correct. I know all those little details are critical to a well-behaved wireless network. I expect it uses the right structures for frame construction - probably utilizing the common 802.11 frame format defined in the kernel.

I'm also aware of the potential for this function to be a bottleneck. TDLS can involve a lot of these management frame exchanges. So, I need to look closely at its efficiency. Is it optimizing memory allocation? Is it avoiding unnecessary copies? Are there any potential performance pitfalls? I expect it to have error handling built into it for cases of invalid input parameters or resource constraints.

Alright, time to crack this thing open and take a look. Let's see how it's actually implemented.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_prep_mgmt_packet]

map[SourceCode: 997:	static int
 998:	ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
 999:					const u8 *peer, int link_id,
1000:					u8 action_code, u8 dialog_token,
1001:					u16 status_code, u32 peer_capability,
1002:					bool initiator, const u8 *extra_ies,
1003:					size_t extra_ies_len, u8 oper_class,
1004:					struct cfg80211_chan_def *chandef)
1005:	{
1006:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1007:		struct sk_buff *skb = NULL;
1008:		struct sta_info *sta;
1009:		u32 flags = 0;
1010:		int ret = 0;
1011:	
1012:		rcu_read_lock();
1013:		sta = sta_info_get(sdata, peer);
1014:	
1015:		/* infer the initiator if we can, to support old userspace */
1016:		switch (action_code) {
1017:		case WLAN_TDLS_SETUP_REQUEST:
1018:			if (sta) {
1019:				set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
1020:				sta->sta.tdls_initiator = false;
1021:			}
1022:			fallthrough;
1023:		case WLAN_TDLS_SETUP_CONFIRM:
1024:		case WLAN_TDLS_DISCOVERY_REQUEST:
1025:			initiator = true;
1026:			break;
1027:		case WLAN_TDLS_SETUP_RESPONSE:
1028:			/*
1029:			 * In some testing scenarios, we send a request and response.
1030:			 * Make the last packet sent take effect for the initiator
1031:			 * value.
1032:			 */
1033:			if (sta) {
1034:				clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR);
1035:				sta->sta.tdls_initiator = true;
1036:			}
1037:			fallthrough;
1038:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1039:			initiator = false;
1040:			break;
1041:		case WLAN_TDLS_TEARDOWN:
1042:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
1043:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
1044:			/* any value is ok */
1045:			break;
1046:		default:
1047:			ret = -EOPNOTSUPP;
1048:			break;
1049:		}
1050:	
1051:		if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR))
1052:			initiator = true;
1053:	
1054:		rcu_read_unlock();
1055:		if (ret < 0)
1056:			goto fail;
1057:	
1058:		skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer,
1059:							    link_id, action_code,
1060:							    dialog_token, status_code,
1061:							    initiator, extra_ies,
1062:							    extra_ies_len, oper_class,
1063:							    chandef);
1064:		if (!skb) {
1065:			ret = -EINVAL;
1066:			goto fail;
1067:		}
1068:	
1069:		if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) {
1070:			ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
1071:			return 0;
1072:		}
1073:	
1074:		/*
1075:		 * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise
1076:		 * we should default to AC_VI.
1077:		 */
1078:		switch (action_code) {
1079:		case WLAN_TDLS_SETUP_REQUEST:
1080:		case WLAN_TDLS_SETUP_RESPONSE:
1081:			skb->priority = 256 + 2;
1082:			break;
1083:		default:
1084:			skb->priority = 256 + 5;
1085:			break;
1086:		}
1087:	
1088:		/*
1089:		 * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress.
1090:		 * Later, if no ACK is returned from peer, we will re-send the teardown
1091:		 * packet through the AP.
1092:		 */
1093:		if ((action_code == WLAN_TDLS_TEARDOWN) &&
1094:		    ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) {
1095:			bool try_resend; /* Should we keep skb for possible resend */
1096:	
1097:			/* If not sending directly to peer - no point in keeping skb */
1098:			rcu_read_lock();
1099:			sta = sta_info_get(sdata, peer);
1100:			try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH);
1101:			rcu_read_unlock();
1102:	
1103:			spin_lock_bh(&sdata->u.mgd.teardown_lock);
1104:			if (try_resend && !sdata->u.mgd.teardown_skb) {
1105:				/* Mark it as requiring TX status callback  */
1106:				flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
1107:					 IEEE80211_TX_INTFL_MLME_CONN_TX;
1108:	
1109:				/*
1110:				 * skb is copied since mac80211 will later set
1111:				 * properties that might not be the same as the AP,
1112:				 * such as encryption, QoS, addresses, etc.
1113:				 *
1114:				 * No problem if skb_copy() fails, so no need to check.
1115:				 */
1116:				sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC);
1117:				sdata->u.mgd.orig_teardown_skb = skb;
1118:			}
1119:			spin_unlock_bh(&sdata->u.mgd.teardown_lock);
1120:		}
1121:	
1122:		/* disable bottom halves when entering the Tx path */
1123:		local_bh_disable();
1124:		__ieee80211_subif_start_xmit(skb, dev, flags,
1125:					     IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
1126:		local_bh_enable();
1127:	
1128:		return ret;
1129:	
1130:	fail:
1131:		dev_kfree_skb(skb);
1132:		return ret;
1133:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 14409
							output: 18
							thoughts: 129
						

Okay, here's my breakdown of what's going on, thinking through this code:

**Digging into the TDLS Management Packet Preparation**

Right, so I see this `ieee80211_tdls_prep_mgmt_packet` function and it's called from `cfg80211_tdls_mgmt`. My first thought is to understand the calling context, so I need to check `cfg80211_tdls_mgmt`. I'll go straight to `net/wireless/tdls.c` or a related file in the kernel source, that's usually where these things live. Hmm, wait a minute, I think `ieee80211_tdls_mgmt` is a mac80211 thing, the MAC layer implementation of the `tdls_mgmt` operation. That clicks now, so it's a layer below `cfg80211`. Now, I need to trace back from that. I need to find the definition of `tdls_mgmt` within `cfg80211`. That's where the user space interface is defined, and that's where the puzzle starts.

map[Expression:tdls_mgmt]

map[Output:drivers/net/wireless/marvell/mwifiex/cfg80211.c=3748=static int mwifiex_cfg80211_set_coalesce(struct wiphy *wiphy,
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3781-
drivers/net/wireless/marvell/mwifiex/cfg80211.c:3782:/* cfg80211 ops handler for tdls_mgmt.
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3783- * Function prepares TDLS action frame packets and forwards them to FW
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c=3785=static int
drivers/net/wireless/marvell/mwifiex/cfg80211.c:3786:mwifiex_cfg80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3787-			   const u8 *peer, int link_id, u8 action_code,
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c=4570=static const struct cfg80211_ops mwifiex_cfg80211_ops = {
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c-4611-	.set_coalesce = mwifiex_cfg80211_set_coalesce,
drivers/net/wireless/marvell/mwifiex/cfg80211.c:4612:	.tdls_mgmt = mwifiex_cfg80211_tdls_mgmt,
drivers/net/wireless/marvell/mwifiex/cfg80211.c-4613-	.tdls_oper = mwifiex_cfg80211_tdls_oper,
--
include/net/cfg80211.h=4482=struct mgmt_frame_regs {
--
include/net/cfg80211.h-4745- *
include/net/cfg80211.h:4746: * @tdls_mgmt: Transmit a TDLS management frame.
include/net/cfg80211.h-4747- * @tdls_oper: Perform a high-level TDLS operation (e.g. TDLS link setup).
--
include/net/cfg80211.h=4901=struct cfg80211_ops {
--
include/net/cfg80211.h-5126-
include/net/cfg80211.h:5127:	int	(*tdls_mgmt)(struct wiphy *wiphy, struct net_device *dev,
include/net/cfg80211.h-5128-			     const u8 *peer, int link_id,
--
include/uapi/linux/nl80211.h=7169=struct nl80211_vendor_cmd_info {
--
include/uapi/linux/nl80211.h-7176- *
include/uapi/linux/nl80211.h:7177: * Used by tdls_mgmt() to determine which conditional elements need
include/uapi/linux/nl80211.h-7178- * to be added to TDLS Setup frames.
--
net/mac80211/cfg.c=5556=const struct cfg80211_ops mac80211_config_ops = {
--
net/mac80211/cfg.c-5628-	.tdls_oper = ieee80211_tdls_oper,
net/mac80211/cfg.c:5629:	.tdls_mgmt = ieee80211_tdls_mgmt,
net/mac80211/cfg.c-5630-	.tdls_channel_switch = ieee80211_tdls_channel_switch,
--
net/mac80211/ieee80211_i.h=2798=void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
--
net/mac80211/ieee80211_i.h-2801-/* TDLS */
net/mac80211/ieee80211_i.h:2802:int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/ieee80211_i.h-2803-			const u8 *peer, int link_id,
--
net/mac80211/tdls.c=1135=static int
net/mac80211/tdls.c:1136:ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1137-			  const u8 *peer, int link_id,
--
net/mac80211/tdls.c=1206=static int
net/mac80211/tdls.c:1207:ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1208-			     const u8 *peer, int link_id,
--
net/mac80211/tdls.c-1254-
net/mac80211/tdls.c:1255:int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1256-			const u8 *peer, int link_id,
--
net/mac80211/tdls.c-1274-	case WLAN_TDLS_SETUP_RESPONSE:
net/mac80211/tdls.c:1275:		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
net/mac80211/tdls.c-1276-						link_id, action_code,
--
net/mac80211/tdls.c-1281-	case WLAN_TDLS_TEARDOWN:
net/mac80211/tdls.c:1282:		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
net/mac80211/tdls.c-1283-						   action_code, dialog_token,
--
net/mac80211/tdls.c=1412=int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1464-		/*
net/mac80211/tdls.c:1465:		 * The teardown message in ieee80211_tdls_mgmt_teardown() was
net/mac80211/tdls.c-1466-		 * created while the queues were stopped, so it might still be
--
net/wireless/nl80211.c=2217=static int nl80211_add_commands_unsplit(struct cfg80211_registered_device *rdev,
--
net/wireless/nl80211.c-2260-	if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
net/wireless/nl80211.c:2261:		CMD(tdls_mgmt, TDLS_MGMT);
net/wireless/nl80211.c-2262-		CMD(tdls_oper, TDLS_OPER);
--
net/wireless/nl80211.c=13676=static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
--
net/wireless/nl80211.c-13690-
net/wireless/nl80211.c:13691:static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
net/wireless/nl80211.c-13692-{
--
net/wireless/nl80211.c-13702-	if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
net/wireless/nl80211.c:13703:	    !rdev->ops->tdls_mgmt)
net/wireless/nl80211.c-13704-		return -EOPNOTSUPP;
--
net/wireless/nl80211.c-13722-
net/wireless/nl80211.c:13723:	return rdev_tdls_mgmt(rdev, dev, peer, link_id, action_code,
net/wireless/nl80211.c-13724-			      dialog_token, status_code, peer_capability,
--
net/wireless/nl80211.c=18309=static const struct genl_small_ops nl80211_small_ops[] = {
--
net/wireless/nl80211.c-18798-		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
net/wireless/nl80211.c:18799:		.doit = nl80211_tdls_mgmt,
net/wireless/nl80211.c-18800-		.flags = GENL_UNS_ADMIN_PERM,
--
net/wireless/rdev-ops.h=910=static inline int rdev_set_rekey_data(struct cfg80211_registered_device *rdev,
--
net/wireless/rdev-ops.h-920-
net/wireless/rdev-ops.h:921:static inline int rdev_tdls_mgmt(struct cfg80211_registered_device *rdev,
net/wireless/rdev-ops.h-922-				 struct net_device *dev, u8 *peer,
--
net/wireless/rdev-ops.h-928-	int ret;
net/wireless/rdev-ops.h:929:	trace_rdev_tdls_mgmt(&rdev->wiphy, dev, peer, link_id, action_code,
net/wireless/rdev-ops.h-930-			     dialog_token, status_code, peer_capability,
net/wireless/rdev-ops.h-931-			     initiator, buf, len);
net/wireless/rdev-ops.h:932:	ret = rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, link_id,
net/wireless/rdev-ops.h-933-				   action_code, dialog_token, status_code,
--
net/wireless/trace.h=1966=DEFINE_EVENT(wiphy_netdev_id_evt, rdev_sched_scan_stop,
--
net/wireless/trace.h-1970-
net/wireless/trace.h:1971:TRACE_EVENT(rdev_tdls_mgmt,
net/wireless/trace.h-1972-	TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
]

gemini-3-flash-preview

							input: 17891
							output: 54
							thoughts: 632
						

**Analyzing the TDLS Management Path and Potential Vulnerability**

Okay, so I'm looking at this `nl80211_tdls_mgmt` function in `net/wireless/nl80211.c`, specifically handling the `NL80211_CMD_TDLS_MGMT` command. I see that it has the `GENL_UNS_ADMIN_PERM` flag, which means it mandates `CAP_NET_ADMIN` in the user namespace. The user's question confirms my initial assessment: triggering this command without that capability isn't possible.

Now, about this "benign warning" in `ieee80211_tdls_add_setup_cfm_ies`. The code in `net/mac80211/ieee80211_tdls.c` includes:

```c
611:		if (WARN_ON_ONCE(!sta || !ap_sta))
612:			return;
```

If either `sta` or `ap_sta` is `NULL`, the function simply returns. `sta` comes from `sta_info_get(sdata, peer)`, and `ap_sta` is obtained via `sta_info_get(sdata, sdata->vif.cfg.ap_addr)`.  Therefore, if someone can trigger this warning via `NL80211_CMD_TDLS_MGMT`, they are either supplying a `peer` address to `sta_info_get` that results in a `NULL` return, or `sdata->vif.cfg.ap_addr` is such that `sta_info_get` returns `NULL`.

Normally, with TDLS, a station would be associated with an AP. If that association doesn't exist, `ap_sta` could very well be `NULL`.

The user's reproducer starts by calling `NL80211_CMD_SET_INTERFACE` and `NL80211_CMD_CONNECT`, which makes sense. Then, there are a few calls to `syz_80211_inject_frame`, which I assume are meant to simulate a connection or some kind of initial state. Finally, `NL80211_CMD_TDLS_MGMT` is executed.

If `ieee80211_tdls_add_setup_cfm_ies` is called with `WLAN_TDLS_SETUP_CONFIRM`, the code should be expecting a station to exist.  I should probably look at the `ieee80211_tdls_mgmt` in `net/mac80211/tdls.c` to see how it's being called.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_mgmt]

map[SourceCode:1255:	int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
1256:				const u8 *peer, int link_id,
1257:				u8 action_code, u8 dialog_token, u16 status_code,
1258:				u32 peer_capability, bool initiator,
1259:				const u8 *extra_ies, size_t extra_ies_len)
1260:	{
1261:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1262:		int ret;
1263:	
1264:		if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
1265:			return -EOPNOTSUPP;
1266:	
1267:		/* make sure we are in managed mode, and associated */
1268:		if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1269:		    !sdata->u.mgd.associated)
1270:			return -EINVAL;
1271:	
1272:		switch (action_code) {
1273:		case WLAN_TDLS_SETUP_REQUEST:
1274:		case WLAN_TDLS_SETUP_RESPONSE:
1275:			ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
1276:							link_id, action_code,
1277:							dialog_token, status_code,
1278:							peer_capability, initiator,
1279:							extra_ies, extra_ies_len);
1280:			break;
1281:		case WLAN_TDLS_TEARDOWN:
1282:			ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
1283:							   action_code, dialog_token,
1284:							   status_code,
1285:							   peer_capability, initiator,
1286:							   extra_ies, extra_ies_len);
1287:			break;
1288:		case WLAN_TDLS_DISCOVERY_REQUEST:
1289:			/*
1290:			 * Protect the discovery so we can hear the TDLS discovery
1291:			 * response frame. It is transmitted directly and not buffered
1292:			 * by the AP.
1293:			 */
1294:			drv_mgd_protect_tdls_discover(sdata->local, sdata, link_id);
1295:			fallthrough;
1296:		case WLAN_TDLS_SETUP_CONFIRM:
1297:		case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
1298:			/* no special handling */
1299:			ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
1300:							      link_id, action_code,
1301:							      dialog_token,
1302:							      status_code,
1303:							      peer_capability,
1304:							      initiator, extra_ies,
1305:							      extra_ies_len, 0, NULL);
1306:			break;
1307:		default:
1308:			ret = -EOPNOTSUPP;
1309:			break;
1310:		}
1311:	
1312:		tdls_dbg(sdata, "TDLS mgmt action %d peer %pM link_id %d status %d\n",
1313:			 action_code, peer, link_id, ret);
1314:		return ret;
1315:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 20233
							output: 56
							thoughts: 525
						

**Analyzing the TDLS Setup Confirmation Path**

Okay, let's break this down. In `ieee80211_tdls_mgmt`, the code first checks if the interface is a station and if it's associated, which makes sense. We expect the station to be associated before attempting a TDLS setup. Good, that's a sanity check.

Now, if the `action_code` is `WLAN_TDLS_SETUP_CONFIRM`, it dives into preparing the management packet. The call chain is pretty clear: `ieee80211_tdls_prep_mgmt_packet` -> `ieee80211_tdls_build_mgmt_packet_data` -> `ieee80211_tdls_add_ies` and finally, for the confirmation, we get `ieee80211_tdls_add_setup_cfm_ies`.

Here's where it gets interesting. Inside `ieee80211_tdls_add_setup_cfm_ies`, it retrieves two station entries. One, using `sta_info_get(sdata, peer)` for the peer station, and another using `sta_info_get(sdata, sdata->vif.cfg.ap_addr)` for the AP station. It then checks if *both* are valid. The assumption here is that if the station is associated, the AP should also be a valid entry.

But wait... the `sta_info_get(sdata, peer)` call is the potential trouble spot. If `sdata->u.mgd.associated` is true, then `sdata->vif.cfg.ap_addr` *should* be valid because it's the AP. But `sta_info_get(sdata, peer)` might return NULL if the peer isn't known to mac80211. This strikes me as odd. If it's a `WLAN_TDLS_SETUP_CONFIRM`, shouldn't the peer already be present in the station table?

My initial thought is, based on the TDLS process I am familiar with, the peer station should have been created during the Request/Response phase. The Confirmation phase seems to imply that the setup is already underway, or that the peers have already negotiated and authenticated. The station information should be there. Perhaps it wasn't there before because it was a security vulnerability?

I'll need to look at `ieee80211_tdls_mgmt_setup` now to understand how station info is handled during the setup *request* and *response* phases to see why the peer station might not be present.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_tdls_mgmt_setup]

map[SourceCode:1135:	static int
1136:	ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
1137:				  const u8 *peer, int link_id,
1138:				  u8 action_code, u8 dialog_token,
1139:				  u16 status_code, u32 peer_capability, bool initiator,
1140:				  const u8 *extra_ies, size_t extra_ies_len)
1141:	{
1142:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1143:		struct ieee80211_local *local = sdata->local;
1144:		enum ieee80211_smps_mode smps_mode =
1145:			sdata->deflink.u.mgd.driver_smps_mode;
1146:		int ret;
1147:	
1148:		/* don't support setup with forced SMPS mode that's not off */
1149:		if (smps_mode != IEEE80211_SMPS_AUTOMATIC &&
1150:		    smps_mode != IEEE80211_SMPS_OFF) {
1151:			tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n",
1152:				 smps_mode);
1153:			return -EOPNOTSUPP;
1154:		}
1155:	
1156:		lockdep_assert_wiphy(local->hw.wiphy);
1157:	
1158:		/* we don't support concurrent TDLS peer setups */
1159:		if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) &&
1160:		    !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) {
1161:			ret = -EBUSY;
1162:			goto out_unlock;
1163:		}
1164:	
1165:		/*
1166:		 * make sure we have a STA representing the peer so we drop or buffer
1167:		 * non-TDLS-setup frames to the peer. We can't send other packets
1168:		 * during setup through the AP path.
1169:		 * Allow error packets to be sent - sometimes we don't even add a STA
1170:		 * before failing the setup.
1171:		 */
1172:		if (status_code == 0) {
1173:			rcu_read_lock();
1174:			if (!sta_info_get(sdata, peer)) {
1175:				rcu_read_unlock();
1176:				ret = -ENOLINK;
1177:				goto out_unlock;
1178:			}
1179:			rcu_read_unlock();
1180:		}
1181:	
1182:		ieee80211_flush_queues(local, sdata, false);
1183:		memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN);
1184:	
1185:		/* we cannot take the mutex while preparing the setup packet */
1186:		ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer,
1187:						      link_id, action_code,
1188:						      dialog_token, status_code,
1189:						      peer_capability, initiator,
1190:						      extra_ies, extra_ies_len, 0,
1191:						      NULL);
1192:		if (ret < 0) {
1193:			eth_zero_addr(sdata->u.mgd.tdls_peer);
1194:			return ret;
1195:		}
1196:	
1197:		wiphy_delayed_work_queue(sdata->local->hw.wiphy,
1198:					 &sdata->u.mgd.tdls_peer_del_work,
1199:					 TDLS_PEER_SETUP_TIMEOUT);
1200:		return 0;
1201:	
1202:	out_unlock:
1203:		return ret;
1204:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 22624
							output: 59
							thoughts: 1682
						

**Analysis of mac80211 TDLS Setup Confirm Handling**

Okay, so here's what I've got. For the `WLAN_TDLS_SETUP_REQUEST` and `WLAN_TDLS_SETUP_RESPONSE` TDLS management frames, the code calls `ieee80211_tdls_mgmt_setup`, which *does* check if the station entry for the peer exists using `sta_info_get`. Makes sense. But, and this is the crux of it, for `WLAN_TDLS_SETUP_CONFIRM`, it calls `ieee80211_tdls_prep_mgmt_packet` *directly*. No station existence check!

So, a user can craft a `NL80211_CMD_TDLS_MGMT` command with `WLAN_TDLS_SETUP_CONFIRM` and a made-up MAC address (peer) that isn't in mac80211's station list. This would lead to `sta_info_get(sdata, peer)` returning NULL inside `ieee80211_tdls_add_setup_cfm_ies`. This, in turn, triggers the `WARN_ON_ONCE`!

The immediate impact is a return, so this would be a benign warning in the logs, but it is still unexpected behavior. The user is right, it's not exploitable for memory corruption or a DoS because of the `WARN_ON_ONCE`, but it's still a flaw.

How does a user even create a station? Usually, it's the stack that creates the station entry when TDLS setup starts. I need to make sure I am not missing something about new stations being created in other ways.

Regarding the AP station (`ap_sta`), if the interface is associated, the AP address should be set. However, there's a slim possibility `sta_info_get` could return NULL for the AP if the station was just removed somehow, but that's less likely. I think I'm more concerned with the lack of a check on the peer station.

The TDLS Setup Confirm, according to 802.11 standards, is the *third* frame in the TDLS setup sequence: Request, Response, then Confirm. The Confirm frame is sent by the Initiator *after* receiving the Response, which *should* create the peer station entry. If someone just *sends* a Confirm frame without the Request/Response sequence, the vulnerability is triggered.

So, what are the *consequences* beyond the warning? The function returns early, meaning the packet isn't fully built. `ieee80211_tdls_add_ies` is called, but that function returns because `ieee80211_tdls_add_setup_cfm_ies` returns early.
The `skb` is still returned to `ieee80211_tdls_build_mgmt_packet_data`, but it only contains what was created by `ieee80211_prep_tdls_encap_data`.

Overall: `WARN_ON_ONCE`, not easily exploitable, but still a bug and should be addressed if possible. It requires `CAP_NET_ADMIN` so it is not completely unprivileged.

map[ContextFile:net/mac80211/tdls.c IncludeLines:true Name:ieee80211_prep_tdls_encap_data]

map[SourceCode: 790:	static int
 791:	ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
 792:				       struct ieee80211_link_data *link,
 793:				       const u8 *peer, u8 action_code, u8 dialog_token,
 794:				       u16 status_code, struct sk_buff *skb)
 795:	{
 796:		struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 797:		struct ieee80211_tdls_data *tf;
 798:	
 799:		tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u));
 800:	
 801:		memcpy(tf->da, peer, ETH_ALEN);
 802:		memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
 803:		tf->ether_type = cpu_to_be16(ETH_P_TDLS);
 804:		tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
 805:	
 806:		/* network header is after the ethernet header */
 807:		skb_set_network_header(skb, ETH_HLEN);
 808:	
 809:		switch (action_code) {
 810:		case WLAN_TDLS_SETUP_REQUEST:
 811:			tf->category = WLAN_CATEGORY_TDLS;
 812:			tf->action_code = WLAN_TDLS_SETUP_REQUEST;
 813:	
 814:			skb_put(skb, sizeof(tf->u.setup_req));
 815:			tf->u.setup_req.dialog_token = dialog_token;
 816:			tf->u.setup_req.capability =
 817:				cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 818:									 status_code));
 819:			break;
 820:		case WLAN_TDLS_SETUP_RESPONSE:
 821:			tf->category = WLAN_CATEGORY_TDLS;
 822:			tf->action_code = WLAN_TDLS_SETUP_RESPONSE;
 823:	
 824:			skb_put(skb, sizeof(tf->u.setup_resp));
 825:			tf->u.setup_resp.status_code = cpu_to_le16(status_code);
 826:			tf->u.setup_resp.dialog_token = dialog_token;
 827:			tf->u.setup_resp.capability =
 828:				cpu_to_le16(ieee80211_get_tdls_sta_capab(link,
 829:									 status_code));
 830:			break;
 831:		case WLAN_TDLS_SETUP_CONFIRM:
 832:			tf->category = WLAN_CATEGORY_TDLS;
 833:			tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
 834:	
 835:			skb_put(skb, sizeof(tf->u.setup_cfm));
 836:			tf->u.setup_cfm.status_code = cpu_to_le16(status_code);
 837:			tf->u.setup_cfm.dialog_token = dialog_token;
 838:			break;
 839:		case WLAN_TDLS_TEARDOWN:
 840:			tf->category = WLAN_CATEGORY_TDLS;
 841:			tf->action_code = WLAN_TDLS_TEARDOWN;
 842:	
 843:			skb_put(skb, sizeof(tf->u.teardown));
 844:			tf->u.teardown.reason_code = cpu_to_le16(status_code);
 845:			break;
 846:		case WLAN_TDLS_DISCOVERY_REQUEST:
 847:			tf->category = WLAN_CATEGORY_TDLS;
 848:			tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST;
 849:	
 850:			skb_put(skb, sizeof(tf->u.discover_req));
 851:			tf->u.discover_req.dialog_token = dialog_token;
 852:			break;
 853:		case WLAN_TDLS_CHANNEL_SWITCH_REQUEST:
 854:			tf->category = WLAN_CATEGORY_TDLS;
 855:			tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST;
 856:	
 857:			skb_put(skb, sizeof(tf->u.chan_switch_req));
 858:			break;
 859:		case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE:
 860:			tf->category = WLAN_CATEGORY_TDLS;
 861:			tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE;
 862:	
 863:			skb_put(skb, sizeof(tf->u.chan_switch_resp));
 864:			tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code);
 865:			break;
 866:		default:
 867:			return -EINVAL;
 868:		}
 869:	
 870:		return 0;
 871:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 26631
							output: 29
							thoughts: 591
						

**Analyzing the TDLS Warning**

Okay, so I'm looking at this warning that pops up when adding Information Elements (IEs) in the TDLS setup. It seems like `ieee80211_tdls_add_ies` is supposed to add these IEs, but sometimes it bails early.  The packet still gets sent, albeit with fewer IEs than it should have.  The allocation of the `skb` (socket buffer) seems robust; it's got enough space from `ieee80211_tdls_build_mgmt_packet_data`, so no obvious memory corruption or crashes. It looks like it's just a benign warning.

But... the user's report is important. They marked it as "DenialOfService: false". I need to verify that.  Triggering a `WARN_ON_ONCE` isn't *typically* a DoS unless it causes a panic. I know that in some environments `panic_on_warn` *is* set, so in those cases, it *could* be a denial of service. However, syzbot usually flags these kinds of warnings as just "WARNING in ...".  Also, if the user has `CAP_NET_ADMIN`, they can do a *lot* of damage to the network interface already, so a harmless warning is the *least* of their worries.

So, I think the user's reasoning is sound; it's likely not a DoS.

Just to be thorough, I should check if there are any *other* `WARN_ON_ONCE` instances in `tdls.c` that could potentially be triggered. Let's see... Aha! In `ieee80211_tdls_add_setup_cfm_ies`:

```c
 605:		if (WARN_ON_ONCE(!sband))
 606:			return;
```

`sband` comes from `ieee80211_get_link_sband(link);`, where `link` comes from `sdata->link[link_id]`. If the `link` is valid, `ieee80211_get_link_sband` *should* return a valid band unless something is seriously broken with the interface configuration. That's likely okay.

The more likely one is the one at line 611:

```c
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
```

This is the one I should focus on.

But wait, I need to make sure to check if a fix for this has been added to the latest kernel. The user wants me to be confident in my reasoning, so I should confirm the finding.

I'll check the revision history of `net/mac80211/tdls.c` to see if there's been any recent patching.

map[PathPrefix:net/mac80211/tdls.c]

map[Output:7d73872d949c wifi: mac80211: check tdls flag in ieee80211_tdls_oper
68eb1b791ac8 wifi: mac80211: pass frame type to element parsing
16ecdab5446f wifi: mac80211: reject TDLS operations when station is not associated
996c15bd30a9 wifi: cfg80211/mac80211: remove more 5/10 MHz code
88b67e91e292 wifi: mac80211: call rate_control_rate_update() for link STA
85977fc0aa48 wifi: mac80211: remove TDLS peers only on affected link
ea8af8be4232 wifi: mac80211: convert ieee80211_ie_build_eht_cap() to SKB use
28aa895bb0b3 wifi: mac80211: convert ieee80211_ie_build_he_cap() to SKB use
147ceae20534 wifi: mac80211: simplify adding supported rates
e0b5ee918723 wifi: mac80211: tdls: use ieee80211_put_he_6ghz_cap()
]

gemini-3-flash-preview

							input: 28244
							output: 24
							thoughts: 58
						

Okay, here's my take on those thoughts, tailored for an expert audience:

**Analyzing a Potential Regression**

Alright, I'm digging through these commits, trying to zero in on the root cause of this warning. Nothing jumps out as an obvious culprit in the immediately preceding changes, which is a bit frustrating. Hold on a second... *16ecdab5446f wifi: mac80211: reject TDLS operations when station is not associated*... that's intriguing. That commit *could* be related, given the nature of the issue. The warning might be related to TDLS operations. I'll need to drill down into that specific change and see if the logic aligns with the warning's context. Let's start with a closer look.

map[Commit:16ecdab5446f]

map[Output:commit 16ecdab5446f15a61ec88eb0d23d25d009821db0
Author: Moon Hee Lee <moonhee.lee.ca@gmail.com>
Date:   Tue Jul 15 16:09:05 2025 -0700

    wifi: mac80211: reject TDLS operations when station is not associated
    
    syzbot triggered a WARN in ieee80211_tdls_oper() by sending
    NL80211_TDLS_ENABLE_LINK immediately after NL80211_CMD_CONNECT,
    before association completed and without prior TDLS setup.
    
    This left internal state like sdata->u.mgd.tdls_peer uninitialized,
    leading to a WARN_ON() in code paths that assumed it was valid.
    
    Reject the operation early if not in station mode or not associated.
    
    Reported-by: syzbot+f73f203f8c9b19037380@syzkaller.appspotmail.com
    Closes: https://syzkaller.appspot.com/bug?extid=f73f203f8c9b19037380
    Fixes: 81dd2b882241 ("mac80211: move TDLS data to mgd private part")
    Tested-by: syzbot+f73f203f8c9b19037380@syzkaller.appspotmail.com
    Signed-off-by: Moon Hee Lee <moonhee.lee.ca@gmail.com>
    Link: https://patch.msgid.link/20250715230904.661092-2-moonhee.lee.ca@gmail.com
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index 94714f8ffd22..ba5fbacbeeda 100644
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -1422,7 +1422,7 @@ int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
 	if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
 		return -EOPNOTSUPP;
 
-	if (sdata->vif.type != NL80211_IFTYPE_STATION)
+	if (sdata->vif.type != NL80211_IFTYPE_STATION || !sdata->vif.cfg.assoc)
 		return -EINVAL;
 
 	switch (oper) {
]

gemini-3-flash-preview

							input: 29239
							output: 26
							thoughts: 886
						

**Analyzing the TDLS Warning in mac80211**

Okay, so I'm looking at this fix for `ieee80211_tdls_oper`, but I'm actually interested in `NL80211_CMD_TDLS_MGMT`, which calls `ieee80211_tdls_mgmt`. The code there checks if the interface is a station and is associated, which seems fine. The discussion mentions `sdata->u.mgd.associated` versus `sdata->vif.cfg.assoc`, but that seems like a red herring; they both indicate association. I need to keep in mind where the warning actually occurs - `ieee80211_tdls_add_setup_cfm_ies`.

I remember the user mentioned a syzbot report, so I'll check to see if that rings a bell later. First, I'll search the kernel source again for that warning message, just to be thorough. Right, it's `WARN_ON_ONCE(!sta || !ap_sta)`. I already found it.

Looking at the code again, the warning is triggered if either `sta` or `ap_sta` are NULL. My initial thought is correct, and the `WLAN_TDLS_SETUP_CONFIRM` path doesn't validate the STA. The question then is, can this be triggered without `CAP_NET_ADMIN`? The user says no, it requires `GENL_UNS_ADMIN_PERM`, because both `NL80211_CMD_TDLS_MGMT` and `NL80211_CMD_TDLS_OPER` require it. I verified this in `net/wireless/nl80211.c`. So that assertion is correct.

Now, is this exploitable? The code just returns after the warning, so there's no memory corruption or use-after-free, just a warning. This means "Exploitable: false" is the correct conclusion. Similarly, "DenialOfService: false" is mostly correct, unless `panic_on_warn` is enabled, which is a configuration detail.

"UserNamespace: true" is also correct, since `GENL_UNS_ADMIN_PERM` allows it in a user namespace. It's triggered by a local command, so "NetworkTrigger: false" and "RemoteTrigger: false" are correct.

But wait a minute, can a *remote* packet trigger this? TDLS frames can come from the network, after all. I should look into how mac80211 handles incoming TDLS frames. They're usually handled in `ieee80211_rx_tdls`. So, let's go find that function and see where it's called from.

no matches

map[Expression:ieee80211_rx_tdls]

map[Output:]

gemini-3-flash-preview

							input: 30773
							output: 18
							thoughts: 21
						

Okay, here's my attempt at summarizing that thought process, tailored for an expert audience, and written in the first person:

**Potential Suspect: A TDLS Connection Handler**

Hmm, I'm trying to pinpoint the relevant function. Let's see... could it be something related to the reception of TDLS (Tunneled Direct Link Setup) frames? My gut says that's a likely area. Given the context, I'm thinking perhaps this issue involves the processing of data that comes in via a direct link setup. Maybe I'm barking up the wrong tree, but I keep circling around `ieee80211_tdls_rx`. It sounds like a strong candidate to investigate further, doesn't it? My years of working with 802.11 have taught me that the reception of these types of packets can be tricky. It's often the place to start when tracking down these types of issues, right?

no matches

map[Expression:tdls_rx]

map[Output:]

gemini-3-flash-preview

							input: 31028
							output: 24
							thoughts: 22
						

Okay, here's my summary, tailored as if I'm thinking it, and you, the expert, are listening:

**Hunting Down the `WLAN_TDLS_SETUP_CONFIRM` in the Receive Path**

Alright, let's dive in. My immediate thought is, I need to track down the processing of `WLAN_TDLS_SETUP_CONFIRM` within the RX (receive) path. This confirmation is critical; it signals something important related to TDLS (Tunneled Direct Link Setup), so finding where it's handled is a priority. I need to understand how the system acknowledges and incorporates this message into its state. Is it a direct trigger for a state transition? Does it update specific data structures? What other functions or modules does it interact with? I'm anticipating that understanding the flow of this confirmation message will provide significant insight into the overall TDLS implementation on the receive side and how this impacts performance. Let's start digging.

map[Expression:WLAN_TDLS_SETUP_CONFIRM]

map[Output:drivers/net/wireless/marvell/mwifiex/cfg80211.c=3786=mwifiex_cfg80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
--
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3820-		break;
drivers/net/wireless/marvell/mwifiex/cfg80211.c:3821:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/cfg80211.c-3822-		mwifiex_dbg(priv->adapter, MSG,
--
drivers/net/wireless/marvell/mwifiex/tdls.c=464=static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-562-
drivers/net/wireless/marvell/mwifiex/tdls.c:563:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-564-		tf->category = WLAN_CATEGORY_TDLS;
drivers/net/wireless/marvell/mwifiex/tdls.c:565:		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
drivers/net/wireless/marvell/mwifiex/tdls.c-566-		skb_put(skb, sizeof(tf->u.setup_cfm));
--
drivers/net/wireless/marvell/mwifiex/tdls.c=628=int mwifiex_send_tdls_data_frame(struct mwifiex_private *priv, const u8 *peer,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-669-	case WLAN_TDLS_SETUP_REQUEST:
drivers/net/wireless/marvell/mwifiex/tdls.c:670:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-671-	case WLAN_TDLS_TEARDOWN:
--
drivers/net/wireless/marvell/mwifiex/tdls.c-720-	*/
drivers/net/wireless/marvell/mwifiex/tdls.c:721:	if (action_code == WLAN_TDLS_SETUP_CONFIRM ||
drivers/net/wireless/marvell/mwifiex/tdls.c-722-	    action_code == WLAN_TDLS_TEARDOWN)
--
drivers/net/wireless/marvell/mwifiex/tdls.c=894=void mwifiex_process_tdls_action_frame(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-936-
drivers/net/wireless/marvell/mwifiex/tdls.c:937:	case WLAN_TDLS_SETUP_CONFIRM:
drivers/net/wireless/marvell/mwifiex/tdls.c-938-		if (len < (sizeof(struct ethhdr) + TDLS_CONFIRM_FIX_LEN))
--
include/linux/ieee80211.h=1972=enum ieee80211_tdls_actioncode {
--
include/linux/ieee80211.h-1974-	WLAN_TDLS_SETUP_RESPONSE = 1,
include/linux/ieee80211.h:1975:	WLAN_TDLS_SETUP_CONFIRM = 2,
include/linux/ieee80211.h-1976-	WLAN_TDLS_TEARDOWN = 3,
--
net/mac80211/tdls.c=741=static void ieee80211_tdls_add_ies(struct ieee80211_link_data *link,
--
net/mac80211/tdls.c-759-		break;
net/mac80211/tdls.c:760:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-761-		if (status_code == 0)
--
net/mac80211/tdls.c=791=ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-830-		break;
net/mac80211/tdls.c:831:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-832-		tf->category = WLAN_CATEGORY_TDLS;
net/mac80211/tdls.c:833:		tf->action_code = WLAN_TDLS_SETUP_CONFIRM;
net/mac80211/tdls.c-834-
--
net/mac80211/tdls.c=909=ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata,
--
net/mac80211/tdls.c-959-	case WLAN_TDLS_SETUP_RESPONSE:
net/mac80211/tdls.c:960:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-961-	case WLAN_TDLS_TEARDOWN:
--
net/mac80211/tdls.c=998=ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1022-		fallthrough;
net/mac80211/tdls.c:1023:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-1024-	case WLAN_TDLS_DISCOVERY_REQUEST:
--
net/mac80211/tdls.c=1255=int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1295-		fallthrough;
net/mac80211/tdls.c:1296:	case WLAN_TDLS_SETUP_CONFIRM:
net/mac80211/tdls.c-1297-	case WLAN_PUB_ACTION_TDLS_DISCOVER_RES:
]

gemini-3-flash-preview

							input: 33017
							output: 20
							thoughts: 92
						

Okay, here's my summary, framed as my thought process:

**TDLS RX Decoding Investigation**

Alright, so I need to track down how the kernel handles TDLS receive operations. My initial instinct is to dig into `net/mac80211/rx.c`, or something closely related, as that's usually where the core receive processing happens for 802.11 frames. However, I've got a hunch that TDLS frames, being a specialized type, might be treated as a subtype of data frame.

Aha! Right, it clicks. TDLS frames are essentially data frames, distinguished by their EtherType, specifically `0x890d`. So, logically, the processing would flow through `ieee80211_rx_data`. Makes sense. Now I need to confirm where this EtherType is handled in the `mac80211` code. Let's see... I'll just do a quick search for `ETH_P_TDLS` within `net/mac80211/` to pinpoint the exact location where that EtherType is recognized and handled. That should get me to the right place.

map[Expression:ETH_P_TDLS]

map[Output:drivers/net/wireless/intel/iwlwifi/mld/rx.c=1544=static int iwl_mld_build_rx_skb(struct iwl_mld *mld, struct sk_buff *skb,
--
drivers/net/wireless/intel/iwlwifi/mld/rx.c-1612-			      shdr->type != htons(ETH_P_PAE) &&
drivers/net/wireless/intel/iwlwifi/mld/rx.c:1613:			      shdr->type != htons(ETH_P_TDLS))))
drivers/net/wireless/intel/iwlwifi/mld/rx.c-1614-			skb->ip_summed = CHECKSUM_NONE;
--
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c=91=static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
--
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c-171-			      shdr->type != htons(ETH_P_PAE) &&
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c:172:			      shdr->type != htons(ETH_P_TDLS))))
drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c-173-			skb->ip_summed = CHECKSUM_NONE;
--
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c=20=static int mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c-43-			if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c:44:			    ntohs(rx_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
drivers/net/wireless/marvell/mwifiex/11n_rxreorder.c-45-				mwifiex_process_tdls_action_frame(priv,
--
drivers/net/wireless/marvell/mwifiex/main.c=770=mwifiex_bypass_tx_queue(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/main.c-778-	     ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/main.c:779:	     (ntohs(eth_hdr->h_proto) == ETH_P_TDLS))) {
drivers/net/wireless/marvell/mwifiex/main.c-780-		mwifiex_dbg(priv->adapter, DATA,
--
drivers/net/wireless/marvell/mwifiex/sta_rx.c=71=int mwifiex_process_rx_packet(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/sta_rx.c-148-	if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
drivers/net/wireless/marvell/mwifiex/sta_rx.c:149:	    ntohs(rx_pkt_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
drivers/net/wireless/marvell/mwifiex/sta_rx.c-150-		offset = (u8 *)local_rx_pd + rx_pkt_off;
--
drivers/net/wireless/marvell/mwifiex/tdls.c=464=static int mwifiex_prep_tdls_encap_data(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/tdls.c-479-	memcpy(tf->sa, priv->curr_addr, ETH_ALEN);
drivers/net/wireless/marvell/mwifiex/tdls.c:480:	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
drivers/net/wireless/marvell/mwifiex/tdls.c-481-	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
--
drivers/net/wireless/marvell/mwifiex/wmm.c=808=mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
--
drivers/net/wireless/marvell/mwifiex/wmm.c-823-	    ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) {
drivers/net/wireless/marvell/mwifiex/wmm.c:824:		if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS)
drivers/net/wireless/marvell/mwifiex/wmm.c-825-			mwifiex_dbg(adapter, DATA,
--
include/linux/ieee80211.h=2579=static inline int ieee80211_get_tdls_action(struct sk_buff *skb)
--
include/linux/ieee80211.h-2585-
include/linux/ieee80211.h:2586:		if (get_unaligned_be16(tdls_data) == ETH_P_TDLS &&
include/linux/ieee80211.h-2587-		    tdls_data[2] == WLAN_TDLS_SNAP_RFTYPE &&
--
include/uapi/linux/if_ether.h-110-#define ETH_P_IBOE	0x8915		/* Infiniband over Ethernet	*/
include/uapi/linux/if_ether.h:111:#define ETH_P_TDLS	0x890D          /* TDLS */
include/uapi/linux/if_ether.h-112-#define ETH_P_FIP	0x8914		/* FCoE Initialization Protocol */
--
net/mac80211/iface.c=1779=static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
--
net/mac80211/iface.c-1798-
net/mac80211/iface.c:1799:		if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
net/mac80211/iface.c-1800-			ieee80211_process_tdls_channel_switch(sdata, skb);
--
net/mac80211/rx.c=3262=ieee80211_rx_h_data(struct ieee80211_rx_data *rx)
--
net/mac80211/rx.c-3301-	if (unlikely(((struct ethhdr *)rx->skb->data)->h_proto ==
net/mac80211/rx.c:3302:						cpu_to_be16(ETH_P_TDLS))) {
net/mac80211/rx.c-3303-		struct ieee80211_tdls_data *tf = (void *)rx->skb->data;
--
net/mac80211/rx.c-3310-		     tf->action_code == WLAN_TDLS_CHANNEL_SWITCH_RESPONSE)) {
net/mac80211/rx.c:3311:			rx->skb->protocol = cpu_to_be16(ETH_P_TDLS);
net/mac80211/rx.c-3312-			__ieee80211_queue_skb_to_iface(sdata, rx->link_id,
--
net/mac80211/rx.c=4925=static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,
--
net/mac80211/rx.c-5007-		 */
net/mac80211/rx.c:5008:		if (unlikely(payload->proto == cpu_to_be16(ETH_P_TDLS) ||
net/mac80211/rx.c-5009-			     payload->proto == fast_rx->control_port_protocol))
--
net/mac80211/tdls.c=791=ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-802-	memcpy(tf->sa, sdata->vif.addr, ETH_ALEN);
net/mac80211/tdls.c:803:	tf->ether_type = cpu_to_be16(ETH_P_TDLS);
net/mac80211/tdls.c-804-	tf->payload_type = WLAN_TDLS_SNAP_RFTYPE;
--
net/mac80211/tx.c=2470=static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
--
net/mac80211/tx.c-2473-
net/mac80211/tx.c:2474:	return ethertype == ETH_P_TDLS &&
net/mac80211/tx.c-2475-	       skb->len > 14 &&
]

gemini-3-flash-preview

							input: 35881
							output: 715
							thoughts: 2567
						

**My Final Reasoning on the TDLS Bug**

Okay, let me lay out my final assessment of this issue. Based on the analysis of the code in `net/mac80211/rx.c` and `net/mac80211/tdls.c` (specifically `ieee80211_tdls_add_setup_cfm_ies`), I've got a pretty good grasp on what's happening. The syzkaller reproducer, although it uses frame injection, ultimately relies on the `NL80211_CMD_TDLS_MGMT` netlink command to trigger the issue. The critical part is the `WLAN_TDLS_SETUP_CONFIRM` action code.

The vulnerability is triggered when we try to add IEs to a TDLS Setup Confirm frame but the necessary station information is missing in the mac80211 stack. This leads to a `WARN_ON_ONCE` within the `ieee80211_tdls_add_setup_cfm_ies` function. This warning indicates an inconsistent internal state – we're trying to confirm a TDLS setup with a station that we don't have information about.

Now, the important part: Who can trigger this? `NL80211_CMD_TDLS_MGMT` requires `GENL_UNS_ADMIN_PERM`, which translates to needing `CAP_NET_ADMIN` privileges in the user namespace. Since this is an unprivileged trigger, it is relevant for an attacker.

But is it exploitable? No, not really. This `WARN_ON_ONCE` simply means the function returns early. There's no memory corruption, no use-after-free, no buffer overflows, nothing that would give a local attacker a leg up in terms of privilege escalation or system control. The fact that the function returns early prevents further problems.

Is it a denial-of-service vector? I have to say no. A single warning logged is hardly a DoS. A user with `CAP_NET_ADMIN` can already cause significantly more disruption – bringing down network interfaces, for instance. A one-time warning is a minor inconvenience at best.

So, in summary:

*   **Exploitable:** False. Just a benign warning.
*   **DenialOfService:** False. The warn is harmless.
*   **Unprivileged:** False. Requires CAP\_NET\_ADMIN.
*   **UserNamespace:** True. Triggerable from a user namespace with CAP\_NET\_ADMIN.
*   **Other Triggers**: False. Triggered by a local netlink command.

gemini-3.1-pro-preview

							input: 93272
							output: 66
							thoughts: 0
						

map[DenialOfService:false Exploitable:false FilesystemTrigger:false NetworkTrigger:false PeripheralTrigger:false RemoteTrigger:false Unprivileged:false UserNamespace:true VMGuestTrigger:false VMHostTrigger:false]

map[DenialOfService:false Exploitable:false FilesystemTrigger:false NetworkTrigger:false PeripheralTrigger:false RemoteTrigger:false Unprivileged:false UserNamespace:true VMGuestTrigger:false VMHostTrigger:false]

gemini-3.1-pro-preview

							input: 93402
							output: 307
							thoughts: 0
						

map[Question:Is there any way to trigger this warning remotely?
The warning is in ieee80211_tdls_add_setup_cfm_ies.
This function is called by ieee80211_tdls_add_ies, which is called by ieee80211_tdls_build_mgmt_packet_data.
ieee80211_tdls_build_mgmt_packet_data is called by ieee80211_tdls_prep_mgmt_packet.
ieee80211_tdls_prep_mgmt_packet is called by ieee80211_tdls_mgmt, ieee80211_tdls_mgmt_setup, and ieee80211_tdls_mgmt_teardown.
ieee80211_tdls_mgmt is the handler for NL80211_CMD_TDLS_MGMT.
ieee80211_tdls_mgmt_setup and ieee80211_tdls_mgmt_teardown are also called by ieee80211_tdls_mgmt.
Is there any other path to ieee80211_tdls_prep_mgmt_packet?
Let's check.]

map[Answer:Based on a detailed analysis of the Linux kernel source code (specifically in the `mac80211` stack), here is the reachability analysis for the warning in `ieee80211_tdls_add_setup_cfm_ies`.

### Call Path Analysis
The function `ieee80211_tdls_add_setup_cfm_ies` is indeed part of the following call chain:
1.  **`ieee80211_tdls_add_setup_cfm_ies`** (contains the `WARN_ON_ONCE(!sta || !ap_sta)`)
2.  **`ieee80211_tdls_add_ies`**: This function calls `ieee80211_tdls_add_setup_cfm_ies` **only** when the `action_code` is `WLAN_TDLS_SETUP_CONFIRM`.
3.  **`ieee80211_tdls_build_mgmt_packet_data`**: This is the sole caller of `ieee80211_tdls_add_ies`.
4.  **`ieee80211_tdls_prep_mgmt_packet`**: This is the primary caller of `ieee80211_tdls_build_mgmt_packet_data` that passes a variable `action_code`.

### Other Paths to `ieee80211_tdls_prep_mgmt_packet`?
As you suspected, `ieee80211_tdls_prep_mgmt_packet` is called by:
*   `ieee80211_tdls_mgmt`
*   `ieee80211_tdls_mgmt_setup` (called by `ieee80211_tdls_mgmt`)
*   `ieee80211_tdls_mgmt_teardown` (called by `ieee80211_tdls_mgmt`)

A thorough search of the kernel tree confirms that **there are no other paths** to `ieee80211_tdls_prep_mgmt_packet`. It is exclusively used within the context of `ieee80211_tdls_mgmt`.

### Other Paths to `ieee80211_tdls_build_mgmt_packet_data`?
There are two other callers of `ieee80211_tdls_build_mgmt_packet_data` in `net/mac80211/tdls.c`:
*   `ieee80211_tdls_ch_sw_resp_tmpl_get`
*   `ieee80211_tdls_ch_sw_tmpl_get`

However, these functions are used to build templates for **TDLS Channel Switching**. They pass hardcoded action codes (`WLAN_TDLS_CHANNEL_SWITCH_RESPONSE` and `WLAN_TDLS_CHANNEL_SWITCH_REQUEST`, respectively). Since `ieee80211_tdls_add_ies` only calls the "Confirm" IE builder when the action code is `WLAN_TDLS_SETUP_CONFIRM`, these paths **cannot** trigger the warning.

### Remote Triggerability
The function `ieee80211_tdls_mgmt` is the implementation of the `.tdls_mgmt` operation in `cfg80211_ops`. It is triggered by the **`NL80211_CMD_TDLS_MGMT`** Netlink command.

*   **Local Trigger**: A local userspace process (like `wpa_supplicant`) can trigger this warning by sending a `WLAN_TDLS_SETUP_CONFIRM` command for a peer MAC address that does not have a corresponding `sta_info` entry in the kernel.
*   **Remote Trigger**: There is **no direct remote path** to this warning. TDLS management frames received over the air are either:
    1.  Passed to userspace for processing (where `wpa_supplicant` would then decide whether to issue a Netlink command).
    2.  Handled internally for specific cases like Channel Switching, which (as shown above) use different code paths that do not reach the warning.

In conclusion, the warning is only reachable via a local Netlink command and cannot be triggered remotely over-the-air.]

gemini-3-flash-preview

You are a capable Linux kernel developer tasked with researching complex questions
about kernel source code. You will be given a concrete question, and need to provide
a concrete answer.
Use tools extensively while researching the question. Don't make assumptions,
or rely on your previous knowledge about the kernel source code, use available tools
to access the actual source code.
Use all available sources of information:
 - kernel source code
 - documentation in the Documentation dir in the source tree
 - git commits descriptions, git blame

Prefer calling several tools at the same time to save round-trips.

Is there any way to trigger this warning remotely?
The warning is in ieee80211_tdls_add_setup_cfm_ies.
This function is called by ieee80211_tdls_add_ies, which is called by ieee80211_tdls_build_mgmt_packet_data.
ieee80211_tdls_build_mgmt_packet_data is called by ieee80211_tdls_prep_mgmt_packet.
ieee80211_tdls_prep_mgmt_packet is called by ieee80211_tdls_mgmt, ieee80211_tdls_mgmt_setup, and ieee80211_tdls_mgmt_teardown.
ieee80211_tdls_mgmt is the handler for NL80211_CMD_TDLS_MGMT.
ieee80211_tdls_mgmt_setup and ieee80211_tdls_mgmt_teardown are also called by ieee80211_tdls_mgmt.
Is there any other path to ieee80211_tdls_prep_mgmt_packet?
Let's check.

Based on a detailed analysis of the Linux kernel source code (specifically in the `mac80211` stack), here is the reachability analysis for the warning in `ieee80211_tdls_add_setup_cfm_ies`.

### Call Path Analysis
The function `ieee80211_tdls_add_setup_cfm_ies` is indeed part of the following call chain:
1.  **`ieee80211_tdls_add_setup_cfm_ies`** (contains the `WARN_ON_ONCE(!sta || !ap_sta)`)
2.  **`ieee80211_tdls_add_ies`**: This function calls `ieee80211_tdls_add_setup_cfm_ies` **only** when the `action_code` is `WLAN_TDLS_SETUP_CONFIRM`.
3.  **`ieee80211_tdls_build_mgmt_packet_data`**: This is the sole caller of `ieee80211_tdls_add_ies`.
4.  **`ieee80211_tdls_prep_mgmt_packet`**: This is the primary caller of `ieee80211_tdls_build_mgmt_packet_data` that passes a variable `action_code`.

### Other Paths to `ieee80211_tdls_prep_mgmt_packet`?
As you suspected, `ieee80211_tdls_prep_mgmt_packet` is called by:
*   `ieee80211_tdls_mgmt`
*   `ieee80211_tdls_mgmt_setup` (called by `ieee80211_tdls_mgmt`)
*   `ieee80211_tdls_mgmt_teardown` (called by `ieee80211_tdls_mgmt`)

A thorough search of the kernel tree confirms that **there are no other paths** to `ieee80211_tdls_prep_mgmt_packet`. It is exclusively used within the context of `ieee80211_tdls_mgmt`.

### Other Paths to `ieee80211_tdls_build_mgmt_packet_data`?
There are two other callers of `ieee80211_tdls_build_mgmt_packet_data` in `net/mac80211/tdls.c`:
*   `ieee80211_tdls_ch_sw_resp_tmpl_get`
*   `ieee80211_tdls_ch_sw_tmpl_get`

However, these functions are used to build templates for **TDLS Channel Switching**. They pass hardcoded action codes (`WLAN_TDLS_CHANNEL_SWITCH_RESPONSE` and `WLAN_TDLS_CHANNEL_SWITCH_REQUEST`, respectively). Since `ieee80211_tdls_add_ies` only calls the "Confirm" IE builder when the action code is `WLAN_TDLS_SETUP_CONFIRM`, these paths **cannot** trigger the warning.

### Remote Triggerability
The function `ieee80211_tdls_mgmt` is the implementation of the `.tdls_mgmt` operation in `cfg80211_ops`. It is triggered by the **`NL80211_CMD_TDLS_MGMT`** Netlink command.

*   **Local Trigger**: A local userspace process (like `wpa_supplicant`) can trigger this warning by sending a `WLAN_TDLS_SETUP_CONFIRM` command for a peer MAC address that does not have a corresponding `sta_info` entry in the kernel.
*   **Remote Trigger**: There is **no direct remote path** to this warning. TDLS management frames received over the air are either:
    1.  Passed to userspace for processing (where `wpa_supplicant` would then decide whether to issue a Netlink command).
    2.  Handled internally for specific cases like Channel Switching, which (as shown above) use different code paths that do not reach the warning.

In conclusion, the warning is only reachable via a local Netlink command and cannot be triggered remotely over-the-air.

gemini-3-flash-preview

							input: 3489
							output: 47
							thoughts: 639
						

**Analyzing the Reachability of a Linux Kernel Wi-Fi Warning**

Okay, so I'm looking at the reachability of a warning within the Linux kernel's Wi-Fi (IEEE 802.11) stack, specifically within the TDLS implementation. The user is focused on the `ieee80211_tdls_add_setup_cfm_ies` function. They've already done some initial tracing and are wondering about alternative call paths to `ieee80211_tdls_prep_mgmt_packet`.

My immediate thought is, "why are they asking about reachability?" This screams vulnerability research to me. If this warning signifies a bug – perhaps a buffer overflow, a missed check, or an assertion failure – then finding a remote trigger could be a critical step toward developing an exploit. But "remote" in the Wi-Fi world often means "over-the-air." And TDLS itself is about setting up direct links *between* stations associated with the *same* access point. The initial path they found involves `NL80211_CMD_TDLS_MGMT`, a netlink command typically issued by a local userspace process. This is good information, but not what I'm looking for... I need to find a way that a packet received OTA can reach the vulnerable path.

So, the key is: If there's a path from a received wireless frame – like a TDLS Setup Request, Response, or Confirm frame – this thing is "remotely" triggerable.

The question then becomes, is this "High Severity" or not? My mind runs through a few checks. Malware development? Nope. Functional exploitation? It's reachability analysis, but the user is investigating something that could lead to exploitation, so it's a precursor to it. Vulnerability finding/scanning/analysis on concrete targets? Ah, here's the tricky bit. The "target" is the Linux kernel source code itself. The policy says *any* vulnerability finding work on concrete targets (including user-provided code, web endpoints, or even AI guardrail circumvention) is subject to review, regardless of authorization. So, is the Linux kernel a "concrete target"? Generally, "concrete target" means an *instance* of a system, like a specific website or IP address. Analyzing open-source code *itself* is usually benign, or a "Low Severity." Unless, of course, the goal is explicitly to create an exploit. And the user *did* ask, "Is there any way to trigger this warning remotely?". This strongly hints at an exploitation focus.

Wait... if it's a `WARN_ON` or something similar, this *likely* indicates a real bug, so I need to know what that warning is.

Okay, let's start by digging into the code and finding the definition of `ieee80211_tdls_add_setup_cfm_ies` and, crucially, what that warning message actually *is*. Then, I can analyze potential attack vectors.

map[ContextFile: IncludeLines:true Name:ieee80211_tdls_add_setup_cfm_ies]

map[SourceCode: 591:	static void
 592:	ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_link_data *link,
 593:					 struct sk_buff *skb, const u8 *peer,
 594:					 bool initiator, const u8 *extra_ies,
 595:					 size_t extra_ies_len)
 596:	{
 597:		struct ieee80211_sub_if_data *sdata = link->sdata;
 598:		struct ieee80211_local *local = sdata->local;
 599:		size_t offset = 0, noffset;
 600:		struct sta_info *sta, *ap_sta;
 601:		struct ieee80211_supported_band *sband;
 602:		u8 *pos;
 603:	
 604:		sband = ieee80211_get_link_sband(link);
 605:		if (WARN_ON_ONCE(!sband))
 606:			return;
 607:	
 608:		sta = sta_info_get(sdata, peer);
 609:		ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
 610:	
 611:		if (WARN_ON_ONCE(!sta || !ap_sta))
 612:			return;
 613:	
 614:		sta->tdls_chandef = link->conf->chanreq.oper;
 615:	
 616:		/* add any custom IEs that go before the QoS IE */
 617:		if (extra_ies_len) {
 618:			static const u8 before_qos[] = {
 619:				WLAN_EID_RSN,
 620:			};
 621:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 622:						     before_qos,
 623:						     ARRAY_SIZE(before_qos),
 624:						     offset);
 625:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 626:			offset = noffset;
 627:		}
 628:	
 629:		/* add the QoS param IE if both the peer and we support it */
 630:		if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
 631:			ieee80211_tdls_add_wmm_param_ie(sdata, skb);
 632:	
 633:		/* add any custom IEs that go before HT operation */
 634:		if (extra_ies_len) {
 635:			static const u8 before_ht_op[] = {
 636:				WLAN_EID_RSN,
 637:				WLAN_EID_QOS_CAPA,
 638:				WLAN_EID_FAST_BSS_TRANSITION,
 639:				WLAN_EID_TIMEOUT_INTERVAL,
 640:			};
 641:			noffset = ieee80211_ie_split(extra_ies, extra_ies_len,
 642:						     before_ht_op,
 643:						     ARRAY_SIZE(before_ht_op),
 644:						     offset);
 645:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 646:			offset = noffset;
 647:		}
 648:	
 649:		/*
 650:		 * if HT support is only added in TDLS, we need an HT-operation IE.
 651:		 * add the IE as required by IEEE802.11-2012 9.23.3.2.
 652:		 */
 653:		if (!ap_sta->sta.deflink.ht_cap.ht_supported && sta->sta.deflink.ht_cap.ht_supported) {
 654:			u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED |
 655:				   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
 656:				   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;
 657:	
 658:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation));
 659:			ieee80211_ie_build_ht_oper(pos, &sta->sta.deflink.ht_cap,
 660:						   &link->conf->chanreq.oper, prot,
 661:						   true);
 662:		}
 663:	
 664:		ieee80211_tdls_add_link_ie(link, skb, peer, initiator);
 665:	
 666:		/* only include VHT-operation if not on the 2.4GHz band */
 667:		if (sband->band != NL80211_BAND_2GHZ &&
 668:		    sta->sta.deflink.vht_cap.vht_supported) {
 669:			/*
 670:			 * if both peers support WIDER_BW, we can expand the chandef to
 671:			 * a wider compatible one, up to 80MHz
 672:			 */
 673:			if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW))
 674:				ieee80211_tdls_chandef_vht_upgrade(sdata, sta);
 675:	
 676:			pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation));
 677:			ieee80211_ie_build_vht_oper(pos, &sta->sta.deflink.vht_cap,
 678:						    &sta->tdls_chandef);
 679:		}
 680:	
 681:		/* add any remaining IEs */
 682:		if (extra_ies_len) {
 683:			noffset = extra_ies_len;
 684:			skb_put_data(skb, extra_ies + offset, noffset - offset);
 685:		}
 686:	}
 SourceFile:net/mac80211/tdls.c]

gemini-3-flash-preview

							input: 6642
							output: 34
							thoughts: 386
						

**Analyzing Potential Remote Trigger of WARN_ON_ONCE**

Okay, so I'm looking at this function and I see two `WARN_ON_ONCE` checks. The first one, `WARN_ON_ONCE(!sband)` at line 605, and the second, `WARN_ON_ONCE(!sta || !ap_sta)` at line 611. The question is, can I trigger *either* of these warnings remotely? It's likely the person asking is leaning towards which is more easily exploitable or has more interesting implications, so I need to assess both.

`sband` comes from `ieee80211_get_link_sband(link)`. `sta` and `ap_sta` are both fetched using `sta_info_get(sdata, peer)` and `sta_info_get(sdata, sdata->vif.cfg.ap_addr)` respectively. The provided trace looks like this: `ieee80211_tdls_add_setup_cfm_ies` <- `ieee80211_tdls_add_ies` <- `ieee80211_tdls_build_mgmt_packet_data` <- `ieee80211_tdls_prep_mgmt_packet` <- (`ieee80211_tdls_mgmt`, `ieee80211_tdls_mgmt_setup`, `ieee80211_tdls_mgmt_teardown`). This seems to originate from `ieee80211_tdls_mgmt` which is the handler for `NL80211_CMD_TDLS_MGMT`. So, that seems to be the entry point.

I need to confirm this call path, of course, but more importantly, I should also look for *other* callers of `ieee80211_tdls_prep_mgmt_packet`. That way I can gain a broader picture of where this particular section of code gets utilized. That will give me a greater idea of the attack surface here.

map[Name:ieee80211_tdls_prep_mgmt_packet]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt SourceFile:net/mac80211/tdls.c SourceLine:1299] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt_setup SourceFile:net/mac80211/tdls.c SourceLine:1186] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt_teardown SourceFile:net/mac80211/tdls.c SourceLine:1229]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 7742
							output: 66
							thoughts: 69
						

Okay, here's my take on those thoughts, framed as my own:

**Digging into TDLS Management Function Calls**

Right, so the caller analysis on `ieee80211_tdls_prep_mgmt_packet` panned out, good. Now, the next logical step is to check the call sites for `ieee80211_tdls_mgmt_setup` and `ieee80211_tdls_mgmt_teardown`. These functions are central to the management of TDLS sessions, so understanding where and how they're used is crucial for grasping the overall TDLS implementation. I need to trace the control flow through those calls to see how TDLS sessions are established and dismantled within the driver's state machine. This should tell me more about any issues that were flagged earlier. The setup and teardown functions are fundamental to the life cycle of a TDLS link, so tracking their use will give me a better understanding of potential vulnerabilities, logic errors, or areas that could benefit from optimization.

map[Name:ieee80211_tdls_mgmt_setup]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt SourceFile:net/mac80211/tdls.c SourceLine:1275]] TruncatedOutput:false]

map[Name:ieee80211_tdls_mgmt_teardown]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_mgmt SourceFile:net/mac80211/tdls.c SourceLine:1282]] TruncatedOutput:false]

gemini-3-flash-preview

							input: 8264
							output: 30
							thoughts: 43
						

Okay, here's my take on those thoughts, framed from an expert's perspective:

**Diving Deep into TDLS Management**

Alright, it seems I'm hitting a wall, and that wall is consistently the `ieee80211_tdls_mgmt` function. No matter which angle I approach this from, the trail keeps leading back there. It's time to take a step back and get a much clearer understanding of this function. To do that, I need to understand its relationship to the rest of the code. My next move is to methodically track down all of the callers to `ieee80211_tdls_mgmt`. I need to understand what's triggering this function to get a good handle on its purpose. From there I can begin to diagnose the issue more effectively.

map[Name:ieee80211_tdls_mgmt]

map[References:<nil> TruncatedOutput:false]

gemini-3-flash-preview

							input: 8529
							output: 26
							thoughts: 156
						

**Digging into the TDLS Mgmt Mystery**

Okay, so I'm looking at this `ieee80211_tdls_mgmt` function and immediately something feels off. No direct references? That's unusual. My first thought is that it's probably called indirectly, maybe through a function pointer table, the way things are often structured in this kernel space. I need to figure out where this function is actually *used*.

My next instinct is to check around `net/mac80211/cfg.c` or other files that handle `nl80211` operations, since those are typically where the interface definitions lie. Ah, right, that's it! `ieee80211_tdls_mgmt` is almost certainly the specific implementation of `tdls_mgmt` within the broader `cfg80211_ops` structure. 

Wait a minute, focusing, right. `mac80211` is the driver-side – or rather, the stack-side – implementation of this whole thing. That's a good mental note.

To be sure, I should just do a full tree search for that exact name, `ieee80211_tdls_mgmt`. It's the most thorough way to find any hidden calls or uses of this function. Let's see what that turns up.

map[Expression:ieee80211_tdls_mgmt]

map[Output:net/mac80211/cfg.c=5556=const struct cfg80211_ops mac80211_config_ops = {
--
net/mac80211/cfg.c-5628-	.tdls_oper = ieee80211_tdls_oper,
net/mac80211/cfg.c:5629:	.tdls_mgmt = ieee80211_tdls_mgmt,
net/mac80211/cfg.c-5630-	.tdls_channel_switch = ieee80211_tdls_channel_switch,
--
net/mac80211/ieee80211_i.h=2798=void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
--
net/mac80211/ieee80211_i.h-2801-/* TDLS */
net/mac80211/ieee80211_i.h:2802:int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/ieee80211_i.h-2803-			const u8 *peer, int link_id,
--
net/mac80211/tdls.c=1135=static int
net/mac80211/tdls.c:1136:ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1137-			  const u8 *peer, int link_id,
--
net/mac80211/tdls.c=1206=static int
net/mac80211/tdls.c:1207:ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1208-			     const u8 *peer, int link_id,
--
net/mac80211/tdls.c-1254-
net/mac80211/tdls.c:1255:int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
net/mac80211/tdls.c-1256-			const u8 *peer, int link_id,
--
net/mac80211/tdls.c-1274-	case WLAN_TDLS_SETUP_RESPONSE:
net/mac80211/tdls.c:1275:		ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer,
net/mac80211/tdls.c-1276-						link_id, action_code,
--
net/mac80211/tdls.c-1281-	case WLAN_TDLS_TEARDOWN:
net/mac80211/tdls.c:1282:		ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, link_id,
net/mac80211/tdls.c-1283-						   action_code, dialog_token,
--
net/mac80211/tdls.c=1412=int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
--
net/mac80211/tdls.c-1464-		/*
net/mac80211/tdls.c:1465:		 * The teardown message in ieee80211_tdls_mgmt_teardown() was
net/mac80211/tdls.c-1466-		 * created while the queues were stopped, so it might still be
]

gemini-3-flash-preview

							input: 10062
							output: 68
							thoughts: 225
						

**Investigating the Paths to TDLS Management Packet Preparation**

Okay, so I'm pretty sure that `ieee80211_tdls_mgmt` is the function that's assigned to the `.tdls_mgmt` field within `mac80211_config_ops`, and that's the entry point triggered by `cfg80211` when a user-space application issues an `NL80211_CMD_TDLS_MGMT` command. That much is clear.

But the question remains: is there *another* way to get to `ieee80211_tdls_prep_mgmt_packet`? I need to be absolutely certain. Let's revisit the code for `ieee80211_tdls_prep_mgmt_packet`. My initial assumption is that this is the primary location for packet construction but is it *exclusively* used by the path I already know?

The `codesearch-find-references` tool should give me the definitive answer here. So far, a quick check of the references to that function in the `net/mac80211/tdls.c` file only shows three calls. All seem to be within the expected TDLS functionality.

Hmm, but I should be thorough. I don't want to miss anything. I'll take an extra moment to check on `ieee80211_tdls_add_ies` and `ieee80211_tdls_build_mgmt_packet_data`. Are those functions also only used locally? Double-checking is probably the best course of action.

map[Name:ieee80211_tdls_add_ies]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_build_mgmt_packet_data SourceFile:net/mac80211/tdls.c SourceLine:984]] TruncatedOutput:false]

map[Name:ieee80211_tdls_build_mgmt_packet_data]

map[References:[map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_ch_sw_resp_tmpl_get SourceFile:net/mac80211/tdls.c SourceLine:1712] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_ch_sw_tmpl_get SourceFile:net/mac80211/tdls.c SourceLine:1587] map[ReferenceKind:calls ReferencingEntityKind:function ReferencingEntityName:ieee80211_tdls_prep_mgmt_packet SourceFile:net/mac80211/tdls.c SourceLine:1058]] TruncatedOutput:false]