// https://syzkaller.appspot.com/bug?id=3cae7194bdc928c437b30120897ff390dcc88843
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

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

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

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;
}

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;
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  for (int i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[8] = {0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0x0,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$nl_generic arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x10 (4 bytes)
  //  ]
  //  returns sock_nl_generic
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
  if (res != -1)
    r[0] = res;
  //  socket$unix arguments: [
  //    domain: const = 0x1 (8 bytes)
  //    type: unix_socket_type = 0x2 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_unix
  res = syscall(__NR_socket, /*domain=*/1ul, /*type=SOCK_DGRAM*/ 2ul,
                /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  syz_genetlink_get_family_id$nl80211 arguments: [
  //    name: ptr[in, buffer] {
  //      buffer: {6e 6c 38 30 32 31 31 00} (length 0x8)
  //    }
  //    fd: sock_nl_generic (resource)
  //  ]
  //  returns nl80211_family_id
  memcpy((void*)0x2000000000c0, "nl80211\000", 8);
  res = -1;
  res = syz_genetlink_get_family_id(/*name=*/0x2000000000c0, /*fd=*/-1);
  if (res != -1)
    r[2] = res;
  //  ioctl$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*)0x200000000100,
         "wlan1\000\000\000\000\000\000\000\000\000\000\000", 16);
  res = syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8933,
                /*arg=*/0x200000000100ul);
  if (res != -1)
    r[3] = *(uint32_t*)0x200000000110;
  //  sendmsg$NL80211_CMD_NEW_INTERFACE arguments: [
  //    fd: sock_nl_generic (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_t[nl80211_family_id,
  //    msg_nl80211_payload[NL80211_CMD_NEW_INTERFACE, nl80211_rdev_payload],
  //    nl80211_policy$new_interface]]] {
  //      msghdr_netlink[netlink_msg_t[nl80211_family_id,
  //      msg_nl80211_payload[NL80211_CMD_NEW_INTERFACE, nl80211_rdev_payload],
  //      nl80211_policy$new_interface]] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_t[nl80211_family_id,
  //        msg_nl80211_payload[NL80211_CMD_NEW_INTERFACE,
  //        nl80211_rdev_payload], nl80211_policy$new_interface]]] {
  //          iovec[in, netlink_msg_t[nl80211_family_id,
  //          msg_nl80211_payload[NL80211_CMD_NEW_INTERFACE,
  //          nl80211_rdev_payload], nl80211_policy$new_interface]] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {44 00 00 00} (length 0x4)
  //                }
  //                union ANYUNION {
  //                  ANYRES16: ANYRES16 (resource)
  //                }
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {01 00 28 bd 70 00 fd db df 25 07 00 00
  //                  00 08 00 03 00} (length 0x12)
  //                }
  //                union ANYUNION {
  //                  ANYRES32: ANYRES32 (resource)
  //                }
  //                union ANYUNION {
  //                  ANYBLOB: buffer: {0c 00 99 00 ff 07 00 00 07 00 00 00 14
  //                  00 04 00 73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00
  //                  08 00 05 00 06} (length 0x25)
  //                }
  //              }
  //            }
  //            len: len = 0x44 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x81 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x24044884 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000300 = 0;
  *(uint32_t*)0x200000000308 = 0;
  *(uint64_t*)0x200000000310 = 0x200000000040;
  *(uint64_t*)0x200000000040 = 0x200000000240;
  memcpy((void*)0x200000000240, "D\000\000\000", 4);
  *(uint16_t*)0x200000000244 = r[2];
  memcpy((void*)0x200000000246,
         "\x01\x00\x28\xbd\x70\x00\xfd\xdb\xdf\x25\x07\x00\x00\x00\x08\x00\x03"
         "\x00",
         18);
  *(uint32_t*)0x200000000258 = r[3];
  memcpy((void*)0x20000000025c,
         "\x0c\x00\x99\x00\xff\x07\x00\x00\x07\x00\x00\x00\x14\x00\x04\x00\x73"
         "\x79\x7a\x6b\x61\x6c\x6c\x65\x72\x30\x00\x00\x00\x00\x00\x00\x08\x00"
         "\x05\x00\x06",
         37);
  *(uint64_t*)0x200000000048 = 0x44;
  *(uint64_t*)0x200000000318 = 1;
  *(uint64_t*)0x200000000320 = 0;
  *(uint64_t*)0x200000000328 = 0;
  *(uint32_t*)0x200000000330 = 0x81;
  syscall(
      __NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000300ul,
      /*f=MSG_ZEROCOPY|MSG_FASTOPEN|MSG_BATCH|MSG_NOSIGNAL|MSG_EOR|MSG_DONTROUTE|MSG_CONFIRM*/
      0x24044884ul);
  //  openat$tun arguments: [
  //    fd: const = 0xffffffffffffff9c (8 bytes)
  //    file: ptr[in, buffer] {
  //      buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd)
  //    }
  //    flags: open_flags = 0x0 (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd_tun
  memcpy((void*)0x200000000400, "/dev/net/tun\000", 13);
  res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                /*file=*/0x200000000400ul, /*flags=*/0, /*mode=*/0);
  if (res != -1)
    r[4] = res;
  //  close arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_close, /*fd=*/r[4]);
  //  socket$inet_sctp arguments: [
  //    domain: const = 0x2 (8 bytes)
  //    type: sctp_socket_type = 0x1 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp
  syscall(__NR_socket, /*domain=*/2ul, /*type=SOCK_STREAM*/ 1ul,
          /*proto=*/0x84);
  //  ioctl$SIOCSIFHWADDR arguments: [
  //    fd: fd_tun (resource)
  //    cmd: const = 0x8914 (4 bytes)
  //    arg: ptr[in, ifreq_dev_t[devnames, mac_addr]] {
  //      ifreq_dev_t[devnames, mac_addr] {
  //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00}
  //        (length 0x10) elem: union mac_addr {
  //          link_local: mac_addr_link_local {
  //            a0: const = 0x1 (1 bytes)
  //            a1: const = 0x80 (1 bytes)
  //            a2: const = 0xc2 (1 bytes)
  //            a3: const = 0x0 (1 bytes)
  //            a4: const = 0x0 (1 bytes)
  //            a5: mac_addr_link_local_values = 0x0 (1 bytes)
  //          }
  //        }
  //        pad = 0x0 (18 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000002280, "syzkaller0\000\000\000\000\000\000", 16);
  *(uint8_t*)0x200000002290 = 1;
  *(uint8_t*)0x200000002291 = 0x80;
  *(uint8_t*)0x200000002292 = 0xc2;
  *(uint8_t*)0x200000002293 = 0;
  *(uint8_t*)0x200000002294 = 0;
  *(uint8_t*)0x200000002295 = 0;
  syscall(__NR_ioctl, /*fd=*/r[4], /*cmd=*/0x8914, /*arg=*/0x200000002280ul);
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[5] = res;
  //  ioctl$sock_SIOCGIFINDEX arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8933 (4 bytes)
  //    arg: ptr[out, ifreq_dev_t[devnames, ifindex]] {
  //      ifreq_dev_t[devnames, ifindex] {
  //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00 00}
  //        (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000000100, "syzkaller0\000\000\000\000\000\000", 16);
  res = syscall(__NR_ioctl, /*fd=*/r[5], /*cmd=*/0x8933,
                /*arg=*/0x200000000100ul);
  if (res != -1)
    r[6] = *(uint32_t*)0x200000000110;
  //  socket$packet arguments: [
  //    domain: const = 0x11 (8 bytes)
  //    type: packet_socket_type = 0x3 (8 bytes)
  //    proto: const = 0x300 (4 bytes)
  //  ]
  //  returns sock_packet
  res = syscall(__NR_socket, /*domain=*/0x11ul, /*type=SOCK_RAW*/ 3ul,
                /*proto=*/0x300);
  if (res != -1)
    r[7] = res;
  //  sendto$packet arguments: [
  //    fd: sock_packet (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {00 0a 18 00 00 0c 00 00 00 eb 55 00 00 00 00 01 00 aa 34 74
  //      5a 19 45 da 08 e8 15 b2 18 b1 75 e6 2e 90 d9 c5 59 6d 3e f4 dd aa e5
  //      7c dc f9 08 84 80 6e 4a ff 2f 2f 3e 18} (length 0x38)
  //    }
  //    len: len = 0x38 (8 bytes)
  //    f: send_flags = 0x4000000 (8 bytes)
  //    addr: ptr[in, sockaddr_ll] {
  //      sockaddr_ll {
  //        sll_family: const = 0x11 (2 bytes)
  //        sll_protocol: packet_protocols = 0xe56930649afa540 (2 bytes)
  //        sll_ifindex: ifindex (resource)
  //        sll_hatype: const = 0x1 (2 bytes)
  //        sll_pkttype: int8 = 0xd8 (1 bytes)
  //        sll_halen: const = 0x6 (1 bytes)
  //        sll_addr: union mac_addr {
  //          dev: mac_addr_t[netdev_addr_id] {
  //            a0: buffer: {aa aa aa aa aa} (length 0x5)
  //            a1: int8 = 0x10 (1 bytes)
  //          }
  //        }
  //        pad: buffer: {00 00} (length 0x2)
  //      }
  //    }
  //    addrlen: len = 0x14 (8 bytes)
  //  ]
  memcpy((void*)0x200000000640,
         "\x00\x0a\x18\x00\x00\x0c\x00\x00\x00\xeb\x55\x00\x00\x00\x00\x01\x00"
         "\xaa\x34\x74\x5a\x19\x45\xda\x08\xe8\x15\xb2\x18\xb1\x75\xe6\x2e\x90"
         "\xd9\xc5\x59\x6d\x3e\xf4\xdd\xaa\xe5\x7c\xdc\xf9\x08\x84\x80\x6e\x4a"
         "\xff\x2f\x2f\x3e\x18",
         56);
  *(uint16_t*)0x200000000380 = 0x11;
  *(uint16_t*)0x200000000382 = htobe16(0xa540);
  *(uint32_t*)0x200000000384 = r[6];
  *(uint16_t*)0x200000000388 = 1;
  *(uint8_t*)0x20000000038a = 0xd8;
  *(uint8_t*)0x20000000038b = 6;
  memset((void*)0x20000000038c, 170, 5);
  *(uint8_t*)0x200000000391 = 0x10;
  memset((void*)0x200000000392, 0, 2);
  syscall(__NR_sendto, /*fd=*/r[7], /*buf=*/0x200000000640ul, /*len=*/0x38ul,
          /*f=MSG_ZEROCOPY*/ 0x4000000ul, /*addr=*/0x200000000380ul,
          /*addrlen=*/0x14ul);
}
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;
  loop();
  return 0;
}