// https://syzkaller.appspot.com/bug?id=a8f4b5fec94d9229d3fd8cfb5a2db8b9ad0dec8c
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <sched.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/swap.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <unistd.h>

#include <linux/capability.h>
#include <linux/falloc.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/loop.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

static unsigned long long procid;

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

static void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

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 void netlink_nest(struct nlmsg* nlmsg, int typ)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_type = typ;
  nlmsg->pos += sizeof(*attr);
  nlmsg->nested[nlmsg->nesting++] = attr;
}

static void netlink_done(struct nlmsg* nlmsg)
{
  struct nlattr* attr = nlmsg->nested[--nlmsg->nesting];
  attr->nla_len = nlmsg->pos - (char*)attr;
}

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_send(struct nlmsg* nlmsg, int sock)
{
  return netlink_send_ext(nlmsg, sock, 0, NULL, true);
}

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 int netlink_next_msg(struct nlmsg* nlmsg, unsigned int offset,
                            unsigned int total_len)
{
  struct nlmsghdr* hdr = (struct nlmsghdr*)(nlmsg->buf + offset);
  if (offset == total_len || offset + hdr->nlmsg_len > total_len)
    return -1;
  return hdr->nlmsg_len;
}

static unsigned int queue_count = 2;

static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type,
                                    const char* name, bool up)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  if (name)
    netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name));
  netlink_attr(nlmsg, IFLA_NUM_TX_QUEUES, &queue_count, sizeof(queue_count));
  netlink_attr(nlmsg, IFLA_NUM_RX_QUEUES, &queue_count, sizeof(queue_count));
  netlink_nest(nlmsg, IFLA_LINKINFO);
  netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type));
}

static void netlink_add_device(struct nlmsg* nlmsg, int sock, const char* type,
                               const char* name)
{
  netlink_add_device_impl(nlmsg, type, name, false);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static void netlink_add_veth(struct nlmsg* nlmsg, int sock, const char* name,
                             const char* peer)
{
  netlink_add_device_impl(nlmsg, "veth", name, false);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  netlink_nest(nlmsg, VETH_INFO_PEER);
  nlmsg->pos += sizeof(struct ifinfomsg);
  netlink_attr(nlmsg, IFLA_IFNAME, peer, strlen(peer));
  netlink_attr(nlmsg, IFLA_NUM_TX_QUEUES, &queue_count, sizeof(queue_count));
  netlink_attr(nlmsg, IFLA_NUM_RX_QUEUES, &queue_count, sizeof(queue_count));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static void netlink_add_xfrm(struct nlmsg* nlmsg, int sock, const char* name)
{
  netlink_add_device_impl(nlmsg, "xfrm", name, true);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  int if_id = 1;
  netlink_attr(nlmsg, 2, &if_id, sizeof(if_id));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static void netlink_add_hsr(struct nlmsg* nlmsg, int sock, const char* name,
                            const char* slave1, const char* slave2)
{
  netlink_add_device_impl(nlmsg, "hsr", name, false);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  int ifindex1 = if_nametoindex(slave1);
  netlink_attr(nlmsg, IFLA_HSR_SLAVE1, &ifindex1, sizeof(ifindex1));
  int ifindex2 = if_nametoindex(slave2);
  netlink_attr(nlmsg, IFLA_HSR_SLAVE2, &ifindex2, sizeof(ifindex2));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static void netlink_add_linked(struct nlmsg* nlmsg, int sock, const char* type,
                               const char* name, const char* link)
{
  netlink_add_device_impl(nlmsg, type, name, false);
  netlink_done(nlmsg);
  int ifindex = if_nametoindex(link);
  netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static void netlink_add_vlan(struct nlmsg* nlmsg, int sock, const char* name,
                             const char* link, uint16_t id, uint16_t proto)
{
  netlink_add_device_impl(nlmsg, "vlan", name, false);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  netlink_attr(nlmsg, IFLA_VLAN_ID, &id, sizeof(id));
  netlink_attr(nlmsg, IFLA_VLAN_PROTOCOL, &proto, sizeof(proto));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int ifindex = if_nametoindex(link);
  netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static void netlink_add_macvlan(struct nlmsg* nlmsg, int sock, const char* name,
                                const char* link)
{
  netlink_add_device_impl(nlmsg, "macvlan", name, false);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  uint32_t mode = MACVLAN_MODE_BRIDGE;
  netlink_attr(nlmsg, IFLA_MACVLAN_MODE, &mode, sizeof(mode));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int ifindex = if_nametoindex(link);
  netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static void netlink_add_geneve(struct nlmsg* nlmsg, int sock, const char* name,
                               uint32_t vni, struct in_addr* addr4,
                               struct in6_addr* addr6)
{
  netlink_add_device_impl(nlmsg, "geneve", name, false);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  netlink_attr(nlmsg, IFLA_GENEVE_ID, &vni, sizeof(vni));
  if (addr4)
    netlink_attr(nlmsg, IFLA_GENEVE_REMOTE, addr4, sizeof(*addr4));
  if (addr6)
    netlink_attr(nlmsg, IFLA_GENEVE_REMOTE6, addr6, sizeof(*addr6));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

#define IFLA_IPVLAN_FLAGS 2
#define IPVLAN_MODE_L3S 2
#undef IPVLAN_F_VEPA
#define IPVLAN_F_VEPA 2

static void netlink_add_ipvlan(struct nlmsg* nlmsg, int sock, const char* name,
                               const char* link, uint16_t mode, uint16_t flags)
{
  netlink_add_device_impl(nlmsg, "ipvlan", name, false);
  netlink_nest(nlmsg, IFLA_INFO_DATA);
  netlink_attr(nlmsg, IFLA_IPVLAN_MODE, &mode, sizeof(mode));
  netlink_attr(nlmsg, IFLA_IPVLAN_FLAGS, &flags, sizeof(flags));
  netlink_done(nlmsg);
  netlink_done(nlmsg);
  int ifindex = if_nametoindex(link);
  netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static void netlink_device_change(struct nlmsg* nlmsg, int sock,
                                  const char* name, bool up, const char* master,
                                  const void* mac, int macsize,
                                  const char* new_name)
{
  struct ifinfomsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  if (up)
    hdr.ifi_flags = hdr.ifi_change = IFF_UP;
  hdr.ifi_index = if_nametoindex(name);
  netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr));
  if (new_name)
    netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name));
  if (master) {
    int ifindex = if_nametoindex(master);
    netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex));
  }
  if (macsize)
    netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static int netlink_add_addr(struct nlmsg* nlmsg, int sock, const char* dev,
                            const void* addr, int addrsize)
{
  struct ifaddrmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120;
  hdr.ifa_scope = RT_SCOPE_UNIVERSE;
  hdr.ifa_index = if_nametoindex(dev);
  netlink_init(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize);
  netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize);
  return netlink_send(nlmsg, sock);
}

static void netlink_add_addr4(struct nlmsg* nlmsg, int sock, const char* dev,
                              const char* addr)
{
  struct in_addr in_addr;
  inet_pton(AF_INET, addr, &in_addr);
  int err = netlink_add_addr(nlmsg, sock, dev, &in_addr, sizeof(in_addr));
  if (err < 0) {
  }
}

static void netlink_add_addr6(struct nlmsg* nlmsg, int sock, const char* dev,
                              const char* addr)
{
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, addr, &in6_addr);
  int err = netlink_add_addr(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr));
  if (err < 0) {
  }
}

static void netlink_add_neigh(struct nlmsg* nlmsg, int sock, const char* name,
                              const void* addr, int addrsize, const void* mac,
                              int macsize)
{
  struct ndmsg hdr;
  memset(&hdr, 0, sizeof(hdr));
  hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6;
  hdr.ndm_ifindex = if_nametoindex(name);
  hdr.ndm_state = NUD_PERMANENT;
  netlink_init(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr,
               sizeof(hdr));
  netlink_attr(nlmsg, NDA_DST, addr, addrsize);
  netlink_attr(nlmsg, NDA_LLADDR, mac, macsize);
  int err = netlink_send(nlmsg, sock);
  if (err < 0) {
  }
}

static struct nlmsg nlmsg;

static int tunfd = -1;

#define TUN_IFACE "syz_tun"
#define LOCAL_MAC 0xaaaaaaaaaaaa
#define REMOTE_MAC 0xaaaaaaaaaabb
#define LOCAL_IPV4 "172.20.20.170"
#define REMOTE_IPV4 "172.20.20.187"
#define LOCAL_IPV6 "fe80::aa"
#define REMOTE_IPV6 "fe80::bb"

#define IFF_NAPI 0x0010
static void correct_dev_net_tun(void)
{
  struct stat st;
  if (stat("/dev/net/tun", &st) == 0) {
    if (S_ISCHR(st.st_mode) && major(st.st_rdev) == 10 &&
        minor(st.st_rdev) == 200)
      return;
    if (unlink("/dev/net/tun")) {
    }
  }
  if (mkdir("/dev/net", 0755) && errno != EEXIST) {
  }
  if (mknod("/dev/net/tun", S_IFCHR | 0666, makedev(10, 200))) {
  }
  if (chmod("/dev/net/tun", 0666)) {
  }
}

static void initialize_tun(void)
{
  correct_dev_net_tun();
  tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
  if (tunfd == -1) {
    printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
    printf("otherwise fuzzing or reproducing might not work as intended\n");
    return;
  }
  const int kTunFd = 200;
  if (dup2(tunfd, kTunFd) < 0)
    exit(1);
  close(tunfd);
  tunfd = kTunFd;
  struct ifreq ifr;
  memset(&ifr, 0, sizeof(ifr));
  strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ);
  ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
  if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
    exit(1);
  }
  char sysctl[64];
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE);
  write_file(sysctl, "0");
  sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE);
  write_file(sysctl, "0");
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  netlink_add_addr4(&nlmsg, sock, TUN_IFACE, LOCAL_IPV4);
  netlink_add_addr6(&nlmsg, sock, TUN_IFACE, LOCAL_IPV6);
  uint64_t macaddr = REMOTE_MAC;
  struct in_addr in_addr;
  inet_pton(AF_INET, REMOTE_IPV4, &in_addr);
  netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in_addr, sizeof(in_addr),
                    &macaddr, ETH_ALEN);
  struct in6_addr in6_addr;
  inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr);
  netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in6_addr, sizeof(in6_addr),
                    &macaddr, ETH_ALEN);
  macaddr = LOCAL_MAC;
  netlink_device_change(&nlmsg, sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN,
                        NULL);
  close(sock);
}

#define DEVLINK_FAMILY_NAME "devlink"

#define DEVLINK_CMD_PORT_GET 5
#define DEVLINK_ATTR_BUS_NAME 1
#define DEVLINK_ATTR_DEV_NAME 2
#define DEVLINK_ATTR_NETDEV_NAME 7

static struct nlmsg nlmsg2;

static void initialize_devlink_ports(const char* bus_name, const char* dev_name,
                                     const char* netdev_prefix)
{
  struct genlmsghdr genlhdr;
  int len, total_len, id, err, offset;
  uint16_t netdev_index;
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock == -1)
    exit(1);
  int rtsock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (rtsock == -1)
    exit(1);
  id = netlink_query_family_id(&nlmsg, sock, DEVLINK_FAMILY_NAME, true);
  if (id == -1)
    goto error;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = DEVLINK_CMD_PORT_GET;
  netlink_init(&nlmsg, id, NLM_F_DUMP, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, DEVLINK_ATTR_BUS_NAME, bus_name, strlen(bus_name) + 1);
  netlink_attr(&nlmsg, DEVLINK_ATTR_DEV_NAME, dev_name, strlen(dev_name) + 1);
  err = netlink_send_ext(&nlmsg, sock, id, &total_len, true);
  if (err < 0) {
    goto error;
  }
  offset = 0;
  netdev_index = 0;
  while ((len = netlink_next_msg(&nlmsg, offset, total_len)) != -1) {
    struct nlattr* attr = (struct nlattr*)(nlmsg.buf + offset + NLMSG_HDRLEN +
                                           NLMSG_ALIGN(sizeof(genlhdr)));
    for (; (char*)attr < nlmsg.buf + offset + len;
         attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
      if (attr->nla_type == DEVLINK_ATTR_NETDEV_NAME) {
        char* port_name;
        char netdev_name[IFNAMSIZ];
        port_name = (char*)(attr + 1);
        snprintf(netdev_name, sizeof(netdev_name), "%s%d", netdev_prefix,
                 netdev_index);
        netlink_device_change(&nlmsg2, rtsock, port_name, true, 0, 0, 0,
                              netdev_name);
        break;
      }
    }
    offset += len;
    netdev_index++;
  }
error:
  close(rtsock);
  close(sock);
}

static int runcmdline(char* cmdline)
{
  int ret = system(cmdline);
  if (ret) {
  }
  return ret;
}

#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02x"
#define DEV_MAC 0x00aaaaaaaaaa

static void netdevsim_add(unsigned int addr, unsigned int port_count)
{
  write_file("/sys/bus/netdevsim/del_device", "%u", addr);
  if (write_file("/sys/bus/netdevsim/new_device", "%u %u", addr, port_count)) {
    char buf[32];
    snprintf(buf, sizeof(buf), "netdevsim%d", addr);
    initialize_devlink_ports("netdevsim", buf, "netdevsim");
  }
}

#define WG_GENL_NAME "wireguard"
enum wg_cmd {
  WG_CMD_GET_DEVICE,
  WG_CMD_SET_DEVICE,
};
enum wgdevice_attribute {
  WGDEVICE_A_UNSPEC,
  WGDEVICE_A_IFINDEX,
  WGDEVICE_A_IFNAME,
  WGDEVICE_A_PRIVATE_KEY,
  WGDEVICE_A_PUBLIC_KEY,
  WGDEVICE_A_FLAGS,
  WGDEVICE_A_LISTEN_PORT,
  WGDEVICE_A_FWMARK,
  WGDEVICE_A_PEERS,
};
enum wgpeer_attribute {
  WGPEER_A_UNSPEC,
  WGPEER_A_PUBLIC_KEY,
  WGPEER_A_PRESHARED_KEY,
  WGPEER_A_FLAGS,
  WGPEER_A_ENDPOINT,
  WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
  WGPEER_A_LAST_HANDSHAKE_TIME,
  WGPEER_A_RX_BYTES,
  WGPEER_A_TX_BYTES,
  WGPEER_A_ALLOWEDIPS,
  WGPEER_A_PROTOCOL_VERSION,
};
enum wgallowedip_attribute {
  WGALLOWEDIP_A_UNSPEC,
  WGALLOWEDIP_A_FAMILY,
  WGALLOWEDIP_A_IPADDR,
  WGALLOWEDIP_A_CIDR_MASK,
};

static void netlink_wireguard_setup(void)
{
  const char ifname_a[] = "wg0";
  const char ifname_b[] = "wg1";
  const char ifname_c[] = "wg2";
  const char private_a[] =
      "\xa0\x5c\xa8\x4f\x6c\x9c\x8e\x38\x53\xe2\xfd\x7a\x70\xae\x0f\xb2\x0f\xa1"
      "\x52\x60\x0c\xb0\x08\x45\x17\x4f\x08\x07\x6f\x8d\x78\x43";
  const char private_b[] =
      "\xb0\x80\x73\xe8\xd4\x4e\x91\xe3\xda\x92\x2c\x22\x43\x82\x44\xbb\x88\x5c"
      "\x69\xe2\x69\xc8\xe9\xd8\x35\xb1\x14\x29\x3a\x4d\xdc\x6e";
  const char private_c[] =
      "\xa0\xcb\x87\x9a\x47\xf5\xbc\x64\x4c\x0e\x69\x3f\xa6\xd0\x31\xc7\x4a\x15"
      "\x53\xb6\xe9\x01\xb9\xff\x2f\x51\x8c\x78\x04\x2f\xb5\x42";
  const char public_a[] =
      "\x97\x5c\x9d\x81\xc9\x83\xc8\x20\x9e\xe7\x81\x25\x4b\x89\x9f\x8e\xd9\x25"
      "\xae\x9f\x09\x23\xc2\x3c\x62\xf5\x3c\x57\xcd\xbf\x69\x1c";
  const char public_b[] =
      "\xd1\x73\x28\x99\xf6\x11\xcd\x89\x94\x03\x4d\x7f\x41\x3d\xc9\x57\x63\x0e"
      "\x54\x93\xc2\x85\xac\xa4\x00\x65\xcb\x63\x11\xbe\x69\x6b";
  const char public_c[] =
      "\xf4\x4d\xa3\x67\xa8\x8e\xe6\x56\x4f\x02\x02\x11\x45\x67\x27\x08\x2f\x5c"
      "\xeb\xee\x8b\x1b\xf5\xeb\x73\x37\x34\x1b\x45\x9b\x39\x22";
  const uint16_t listen_a = 20001;
  const uint16_t listen_b = 20002;
  const uint16_t listen_c = 20003;
  const uint16_t af_inet = AF_INET;
  const uint16_t af_inet6 = AF_INET6;
  const struct sockaddr_in endpoint_b_v4 = {
      .sin_family = AF_INET,
      .sin_port = htons(listen_b),
      .sin_addr = {htonl(INADDR_LOOPBACK)}};
  const struct sockaddr_in endpoint_c_v4 = {
      .sin_family = AF_INET,
      .sin_port = htons(listen_c),
      .sin_addr = {htonl(INADDR_LOOPBACK)}};
  struct sockaddr_in6 endpoint_a_v6 = {.sin6_family = AF_INET6,
                                       .sin6_port = htons(listen_a)};
  endpoint_a_v6.sin6_addr = in6addr_loopback;
  struct sockaddr_in6 endpoint_c_v6 = {.sin6_family = AF_INET6,
                                       .sin6_port = htons(listen_c)};
  endpoint_c_v6.sin6_addr = in6addr_loopback;
  const struct in_addr first_half_v4 = {0};
  const struct in_addr second_half_v4 = {(uint32_t)htonl(128 << 24)};
  const struct in6_addr first_half_v6 = {{{0}}};
  const struct in6_addr second_half_v6 = {{{0x80}}};
  const uint8_t half_cidr = 1;
  const uint16_t persistent_keepalives[] = {1, 3, 7, 9, 14, 19};
  struct genlmsghdr genlhdr = {.cmd = WG_CMD_SET_DEVICE, .version = 1};
  int sock;
  int id, err;
  sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock == -1) {
    return;
  }
  id = netlink_query_family_id(&nlmsg, sock, WG_GENL_NAME, true);
  if (id == -1)
    goto error;
  netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_a, strlen(ifname_a) + 1);
  netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_a, 32);
  netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_a, 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4,
               sizeof(endpoint_b_v4));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[0], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
               sizeof(first_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
               sizeof(first_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v6,
               sizeof(endpoint_c_v6));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[1], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
               sizeof(second_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
               sizeof(second_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  err = netlink_send(&nlmsg, sock);
  if (err < 0) {
  }
  netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_b, strlen(ifname_b) + 1);
  netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_b, 32);
  netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_b, 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6,
               sizeof(endpoint_a_v6));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[2], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
               sizeof(first_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
               sizeof(first_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v4,
               sizeof(endpoint_c_v4));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[3], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
               sizeof(second_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
               sizeof(second_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  err = netlink_send(&nlmsg, sock);
  if (err < 0) {
  }
  netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_c, strlen(ifname_c) + 1);
  netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_c, 32);
  netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_c, 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6,
               sizeof(endpoint_a_v6));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[4], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
               sizeof(first_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
               sizeof(first_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32);
  netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4,
               sizeof(endpoint_b_v4));
  netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
               &persistent_keepalives[5], 2);
  netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
               sizeof(second_half_v4));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_nest(&nlmsg, NLA_F_NESTED | 0);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
  netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
               sizeof(second_half_v6));
  netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  netlink_done(&nlmsg);
  err = netlink_send(&nlmsg, sock);
  if (err < 0) {
  }

error:
  close(sock);
}

static void initialize_netdevices(void)
{
  char netdevsim[16];
  sprintf(netdevsim, "netdevsim%d", (int)procid);
  struct {
    const char* type;
    const char* dev;
  } devtypes[] = {
      {"ip6gretap", "ip6gretap0"}, {"bridge", "bridge0"}, {"vcan", "vcan0"},
      {"bond", "bond0"},           {"team", "team0"},     {"dummy", "dummy0"},
      {"nlmon", "nlmon0"},         {"caif", "caif0"},     {"batadv", "batadv0"},
      {"vxcan", "vxcan1"},         {"veth", 0},           {"wireguard", "wg0"},
      {"wireguard", "wg1"},        {"wireguard", "wg2"},
  };
  const char* devmasters[] = {"bridge", "bond", "team", "batadv"};
  struct {
    const char* name;
    int macsize;
    bool noipv6;
  } devices[] = {
      {"lo", ETH_ALEN},
      {"sit0", 0},
      {"bridge0", ETH_ALEN},
      {"vcan0", 0, true},
      {"tunl0", 0},
      {"gre0", 0},
      {"gretap0", ETH_ALEN},
      {"ip_vti0", 0},
      {"ip6_vti0", 0},
      {"ip6tnl0", 0},
      {"ip6gre0", 0},
      {"ip6gretap0", ETH_ALEN},
      {"erspan0", ETH_ALEN},
      {"bond0", ETH_ALEN},
      {"veth0", ETH_ALEN},
      {"veth1", ETH_ALEN},
      {"team0", ETH_ALEN},
      {"veth0_to_bridge", ETH_ALEN},
      {"veth1_to_bridge", ETH_ALEN},
      {"veth0_to_bond", ETH_ALEN},
      {"veth1_to_bond", ETH_ALEN},
      {"veth0_to_team", ETH_ALEN},
      {"veth1_to_team", ETH_ALEN},
      {"veth0_to_hsr", ETH_ALEN},
      {"veth1_to_hsr", ETH_ALEN},
      {"hsr0", 0},
      {"dummy0", ETH_ALEN},
      {"nlmon0", 0},
      {"vxcan0", 0, true},
      {"vxcan1", 0, true},
      {"caif0", ETH_ALEN},
      {"batadv0", ETH_ALEN},
      {netdevsim, ETH_ALEN},
      {"xfrm0", ETH_ALEN},
      {"veth0_virt_wifi", ETH_ALEN},
      {"veth1_virt_wifi", ETH_ALEN},
      {"virt_wifi0", ETH_ALEN},
      {"veth0_vlan", ETH_ALEN},
      {"veth1_vlan", ETH_ALEN},
      {"vlan0", ETH_ALEN},
      {"vlan1", ETH_ALEN},
      {"macvlan0", ETH_ALEN},
      {"macvlan1", ETH_ALEN},
      {"ipvlan0", ETH_ALEN},
      {"ipvlan1", ETH_ALEN},
      {"veth0_macvtap", ETH_ALEN},
      {"veth1_macvtap", ETH_ALEN},
      {"macvtap0", ETH_ALEN},
      {"macsec0", ETH_ALEN},
      {"veth0_to_batadv", ETH_ALEN},
      {"veth1_to_batadv", ETH_ALEN},
      {"batadv_slave_0", ETH_ALEN},
      {"batadv_slave_1", ETH_ALEN},
      {"geneve0", ETH_ALEN},
      {"geneve1", ETH_ALEN},
      {"wg0", 0},
      {"wg1", 0},
      {"wg2", 0},
  };
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  unsigned i;
  for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++)
    netlink_add_device(&nlmsg, sock, devtypes[i].type, devtypes[i].dev);
  for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) {
    char master[32], slave0[32], veth0[32], slave1[32], veth1[32];
    sprintf(slave0, "%s_slave_0", devmasters[i]);
    sprintf(veth0, "veth0_to_%s", devmasters[i]);
    netlink_add_veth(&nlmsg, sock, slave0, veth0);
    sprintf(slave1, "%s_slave_1", devmasters[i]);
    sprintf(veth1, "veth1_to_%s", devmasters[i]);
    netlink_add_veth(&nlmsg, sock, slave1, veth1);
    sprintf(master, "%s0", devmasters[i]);
    netlink_device_change(&nlmsg, sock, slave0, false, master, 0, 0, NULL);
    netlink_device_change(&nlmsg, sock, slave1, false, master, 0, 0, NULL);
  }
  netlink_add_xfrm(&nlmsg, sock, "xfrm0");
  netlink_device_change(&nlmsg, sock, "bridge_slave_0", true, 0, 0, 0, NULL);
  netlink_device_change(&nlmsg, sock, "bridge_slave_1", true, 0, 0, 0, NULL);
  netlink_add_veth(&nlmsg, sock, "hsr_slave_0", "veth0_to_hsr");
  netlink_add_veth(&nlmsg, sock, "hsr_slave_1", "veth1_to_hsr");
  netlink_add_hsr(&nlmsg, sock, "hsr0", "hsr_slave_0", "hsr_slave_1");
  netlink_device_change(&nlmsg, sock, "hsr_slave_0", true, 0, 0, 0, NULL);
  netlink_device_change(&nlmsg, sock, "hsr_slave_1", true, 0, 0, 0, NULL);
  netlink_add_veth(&nlmsg, sock, "veth0_virt_wifi", "veth1_virt_wifi");
  netlink_add_linked(&nlmsg, sock, "virt_wifi", "virt_wifi0",
                     "veth1_virt_wifi");
  netlink_add_veth(&nlmsg, sock, "veth0_vlan", "veth1_vlan");
  netlink_add_vlan(&nlmsg, sock, "vlan0", "veth0_vlan", 0, htons(ETH_P_8021Q));
  netlink_add_vlan(&nlmsg, sock, "vlan1", "veth0_vlan", 1, htons(ETH_P_8021AD));
  netlink_add_macvlan(&nlmsg, sock, "macvlan0", "veth1_vlan");
  netlink_add_macvlan(&nlmsg, sock, "macvlan1", "veth1_vlan");
  netlink_add_ipvlan(&nlmsg, sock, "ipvlan0", "veth0_vlan", IPVLAN_MODE_L2, 0);
  netlink_add_ipvlan(&nlmsg, sock, "ipvlan1", "veth0_vlan", IPVLAN_MODE_L3S,
                     IPVLAN_F_VEPA);
  netlink_add_veth(&nlmsg, sock, "veth0_macvtap", "veth1_macvtap");
  netlink_add_linked(&nlmsg, sock, "macvtap", "macvtap0", "veth0_macvtap");
  netlink_add_linked(&nlmsg, sock, "macsec", "macsec0", "veth1_macvtap");
  char addr[32];
  sprintf(addr, DEV_IPV4, 14 + 10);
  struct in_addr geneve_addr4;
  if (inet_pton(AF_INET, addr, &geneve_addr4) <= 0)
    exit(1);
  struct in6_addr geneve_addr6;
  if (inet_pton(AF_INET6, "fc00::01", &geneve_addr6) <= 0)
    exit(1);
  netlink_add_geneve(&nlmsg, sock, "geneve0", 0, &geneve_addr4, 0);
  netlink_add_geneve(&nlmsg, sock, "geneve1", 1, 0, &geneve_addr6);
  netdevsim_add((int)procid, 4);
  netlink_wireguard_setup();
  for (i = 0; i < sizeof(devices) / (sizeof(devices[0])); i++) {
    char addr[32];
    sprintf(addr, DEV_IPV4, i + 10);
    netlink_add_addr4(&nlmsg, sock, devices[i].name, addr);
    if (!devices[i].noipv6) {
      sprintf(addr, DEV_IPV6, i + 10);
      netlink_add_addr6(&nlmsg, sock, devices[i].name, addr);
    }
    uint64_t macaddr = DEV_MAC + ((i + 10ull) << 40);
    netlink_device_change(&nlmsg, sock, devices[i].name, true, 0, &macaddr,
                          devices[i].macsize, NULL);
  }
  close(sock);
}
static void initialize_netdevices_init(void)
{
  int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock == -1)
    exit(1);
  struct {
    const char* type;
    int macsize;
    bool noipv6;
    bool noup;
  } devtypes[] = {
      {"nr", 7, true},
      {"rose", 5, true, true},
  };
  unsigned i;
  for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) {
    char dev[32], addr[32];
    sprintf(dev, "%s%d", devtypes[i].type, (int)procid);
    sprintf(addr, "172.30.%d.%d", i, (int)procid + 1);
    netlink_add_addr4(&nlmsg, sock, dev, addr);
    if (!devtypes[i].noipv6) {
      sprintf(addr, "fe88::%02x:%02x", i, (int)procid + 1);
      netlink_add_addr6(&nlmsg, sock, dev, addr);
    }
    int macsize = devtypes[i].macsize;
    uint64_t macaddr = 0xbbbbbb +
                       ((unsigned long long)i << (8 * (macsize - 2))) +
                       (procid << (8 * (macsize - 1)));
    netlink_device_change(&nlmsg, sock, dev, !devtypes[i].noup, 0, &macaddr,
                          macsize, NULL);
  }
  close(sock);
}

#define MAX_FDS 30

//% This code is derived from puff.{c,h}, found in the zlib development. The
//% original files come with the following copyright notice:

//% Copyright (C) 2002-2013 Mark Adler, all rights reserved
//% version 2.3, 21 Jan 2013
//% This software is provided 'as-is', without any express or implied
//% warranty.  In no event will the author be held liable for any damages
//% arising from the use of this software.
//% Permission is granted to anyone to use this software for any purpose,
//% including commercial applications, and to alter it and redistribute it
//% freely, subject to the following restrictions:
//% 1. The origin of this software must not be misrepresented; you must not
//%    claim that you wrote the original software. If you use this software
//%    in a product, an acknowledgment in the product documentation would be
//%    appreciated but is not required.
//% 2. Altered source versions must be plainly marked as such, and must not be
//%    misrepresented as being the original software.
//% 3. This notice may not be removed or altered from any source distribution.
//% Mark Adler    madler@alumni.caltech.edu

//% BEGIN CODE DERIVED FROM puff.{c,h}

#define MAXBITS 15
#define MAXLCODES 286
#define MAXDCODES 30
#define MAXCODES (MAXLCODES + MAXDCODES)
#define FIXLCODES 288

struct puff_state {
  unsigned char* out;
  unsigned long outlen;
  unsigned long outcnt;
  const unsigned char* in;
  unsigned long inlen;
  unsigned long incnt;
  int bitbuf;
  int bitcnt;
  jmp_buf env;
};
static int puff_bits(struct puff_state* s, int need)
{
  long val = s->bitbuf;
  while (s->bitcnt < need) {
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    val |= (long)(s->in[s->incnt++]) << s->bitcnt;
    s->bitcnt += 8;
  }
  s->bitbuf = (int)(val >> need);
  s->bitcnt -= need;
  return (int)(val & ((1L << need) - 1));
}
static int puff_stored(struct puff_state* s)
{
  s->bitbuf = 0;
  s->bitcnt = 0;
  if (s->incnt + 4 > s->inlen)
    return 2;
  unsigned len = s->in[s->incnt++];
  len |= s->in[s->incnt++] << 8;
  if (s->in[s->incnt++] != (~len & 0xff) ||
      s->in[s->incnt++] != ((~len >> 8) & 0xff))
    return -2;
  if (s->incnt + len > s->inlen)
    return 2;
  if (s->outcnt + len > s->outlen)
    return 1;
  for (; len--; s->outcnt++, s->incnt++) {
    if (s->in[s->incnt])
      s->out[s->outcnt] = s->in[s->incnt];
  }
  return 0;
}
struct puff_huffman {
  short* count;
  short* symbol;
};
static int puff_decode(struct puff_state* s, const struct puff_huffman* h)
{
  int first = 0;
  int index = 0;
  int bitbuf = s->bitbuf;
  int left = s->bitcnt;
  int code = first = index = 0;
  int len = 1;
  short* next = h->count + 1;
  while (1) {
    while (left--) {
      code |= bitbuf & 1;
      bitbuf >>= 1;
      int count = *next++;
      if (code - count < first) {
        s->bitbuf = bitbuf;
        s->bitcnt = (s->bitcnt - len) & 7;
        return h->symbol[index + (code - first)];
      }
      index += count;
      first += count;
      first <<= 1;
      code <<= 1;
      len++;
    }
    left = (MAXBITS + 1) - len;
    if (left == 0)
      break;
    if (s->incnt == s->inlen)
      longjmp(s->env, 1);
    bitbuf = s->in[s->incnt++];
    if (left > 8)
      left = 8;
  }
  return -10;
}
static int puff_construct(struct puff_huffman* h, const short* length, int n)
{
  int len;
  for (len = 0; len <= MAXBITS; len++)
    h->count[len] = 0;
  int symbol;
  for (symbol = 0; symbol < n; symbol++)
    (h->count[length[symbol]])++;
  if (h->count[0] == n)
    return 0;
  int left = 1;
  for (len = 1; len <= MAXBITS; len++) {
    left <<= 1;
    left -= h->count[len];
    if (left < 0)
      return left;
  }
  short offs[MAXBITS + 1];
  offs[1] = 0;
  for (len = 1; len < MAXBITS; len++)
    offs[len + 1] = offs[len] + h->count[len];
  for (symbol = 0; symbol < n; symbol++)
    if (length[symbol] != 0)
      h->symbol[offs[length[symbol]]++] = symbol;
  return left;
}
static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode,
                      const struct puff_huffman* distcode)
{
  static const short lens[29] = {3,  4,  5,  6,   7,   8,   9,   10,  11, 13,
                                 15, 17, 19, 23,  27,  31,  35,  43,  51, 59,
                                 67, 83, 99, 115, 131, 163, 195, 227, 258};
  static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2,
                                 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
  static const short dists[30] = {
      1,    2,    3,    4,    5,    7,    9,    13,    17,    25,
      33,   49,   65,   97,   129,  193,  257,  385,   513,   769,
      1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
  static const short dext[30] = {0, 0, 0,  0,  1,  1,  2,  2,  3,  3,
                                 4, 4, 5,  5,  6,  6,  7,  7,  8,  8,
                                 9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
  int symbol;
  do {
    symbol = puff_decode(s, lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 256) {
      if (s->outcnt == s->outlen)
        return 1;
      if (symbol)
        s->out[s->outcnt] = symbol;
      s->outcnt++;
    } else if (symbol > 256) {
      symbol -= 257;
      if (symbol >= 29)
        return -10;
      int len = lens[symbol] + puff_bits(s, lext[symbol]);
      symbol = puff_decode(s, distcode);
      if (symbol < 0)
        return symbol;
      unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]);
      if (dist > s->outcnt)
        return -11;
      if (s->outcnt + len > s->outlen)
        return 1;
      while (len--) {
        if (dist <= s->outcnt && s->out[s->outcnt - dist])
          s->out[s->outcnt] = s->out[s->outcnt - dist];
        s->outcnt++;
      }
    }
  } while (symbol != 256);
  return 0;
}
static int puff_fixed(struct puff_state* s)
{
  static int virgin = 1;
  static short lencnt[MAXBITS + 1], lensym[FIXLCODES];
  static short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  static struct puff_huffman lencode, distcode;
  if (virgin) {
    lencode.count = lencnt;
    lencode.symbol = lensym;
    distcode.count = distcnt;
    distcode.symbol = distsym;
    short lengths[FIXLCODES];
    int symbol;
    for (symbol = 0; symbol < 144; symbol++)
      lengths[symbol] = 8;
    for (; symbol < 256; symbol++)
      lengths[symbol] = 9;
    for (; symbol < 280; symbol++)
      lengths[symbol] = 7;
    for (; symbol < FIXLCODES; symbol++)
      lengths[symbol] = 8;
    puff_construct(&lencode, lengths, FIXLCODES);
    for (symbol = 0; symbol < MAXDCODES; symbol++)
      lengths[symbol] = 5;
    puff_construct(&distcode, lengths, MAXDCODES);
    virgin = 0;
  }
  return puff_codes(s, &lencode, &distcode);
}
static int puff_dynamic(struct puff_state* s)
{
  static const short order[19] = {16, 17, 18, 0, 8,  7, 9,  6, 10, 5,
                                  11, 4,  12, 3, 13, 2, 14, 1, 15};
  int nlen = puff_bits(s, 5) + 257;
  int ndist = puff_bits(s, 5) + 1;
  int ncode = puff_bits(s, 4) + 4;
  if (nlen > MAXLCODES || ndist > MAXDCODES)
    return -3;
  short lengths[MAXCODES];
  int index;
  for (index = 0; index < ncode; index++)
    lengths[order[index]] = puff_bits(s, 3);
  for (; index < 19; index++)
    lengths[order[index]] = 0;
  short lencnt[MAXBITS + 1], lensym[MAXLCODES];
  struct puff_huffman lencode = {lencnt, lensym};
  int err = puff_construct(&lencode, lengths, 19);
  if (err != 0)
    return -4;
  index = 0;
  while (index < nlen + ndist) {
    int symbol;
    int len;
    symbol = puff_decode(s, &lencode);
    if (symbol < 0)
      return symbol;
    if (symbol < 16)
      lengths[index++] = symbol;
    else {
      len = 0;
      if (symbol == 16) {
        if (index == 0)
          return -5;
        len = lengths[index - 1];
        symbol = 3 + puff_bits(s, 2);
      } else if (symbol == 17)
        symbol = 3 + puff_bits(s, 3);
      else
        symbol = 11 + puff_bits(s, 7);
      if (index + symbol > nlen + ndist)
        return -6;
      while (symbol--)
        lengths[index++] = len;
    }
  }
  if (lengths[256] == 0)
    return -9;
  err = puff_construct(&lencode, lengths, nlen);
  if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1]))
    return -7;
  short distcnt[MAXBITS + 1], distsym[MAXDCODES];
  struct puff_huffman distcode = {distcnt, distsym};
  err = puff_construct(&distcode, lengths + nlen, ndist);
  if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1]))
    return -8;
  return puff_codes(s, &lencode, &distcode);
}
static int puff(unsigned char* dest, unsigned long* destlen,
                const unsigned char* source, unsigned long sourcelen)
{
  struct puff_state s = {
      .out = dest,
      .outlen = *destlen,
      .outcnt = 0,
      .in = source,
      .inlen = sourcelen,
      .incnt = 0,
      .bitbuf = 0,
      .bitcnt = 0,
  };
  int err;
  if (setjmp(s.env) != 0)
    err = 2;
  else {
    int last;
    do {
      last = puff_bits(&s, 1);
      int type = puff_bits(&s, 2);
      err = type == 0 ? puff_stored(&s)
                      : (type == 1 ? puff_fixed(&s)
                                   : (type == 2 ? puff_dynamic(&s) : -1));
      if (err != 0)
        break;
    } while (!last);
  }
  *destlen = s.outcnt;
  return err;
}

//% END CODE DERIVED FROM puff.{c,h}

#define ZLIB_HEADER_WIDTH 2

static int puff_zlib_to_file(const unsigned char* source,
                             unsigned long sourcelen, int dest_fd)
{
  if (sourcelen < ZLIB_HEADER_WIDTH)
    return 0;
  source += ZLIB_HEADER_WIDTH;
  sourcelen -= ZLIB_HEADER_WIDTH;
  const unsigned long max_destlen = 132 << 20;
  void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ,
                   MAP_PRIVATE | MAP_ANON, -1, 0);
  if (ret == MAP_FAILED)
    return -1;
  unsigned char* dest = (unsigned char*)ret;
  unsigned long destlen = max_destlen;
  int err = puff(dest, &destlen, source, sourcelen);
  if (err) {
    munmap(dest, max_destlen);
    errno = -err;
    return -1;
  }
  if (write(dest_fd, dest, destlen) != (ssize_t)destlen) {
    munmap(dest, max_destlen);
    return -1;
  }
  return munmap(dest, max_destlen);
}

static int setup_loop_device(unsigned char* data, unsigned long size,
                             const char* loopname, int* loopfd_p)
{
  int err = 0, loopfd = -1;
  int memfd = syscall(__NR_memfd_create, "syzkaller", 0);
  if (memfd == -1) {
    err = errno;
    goto error;
  }
  if (puff_zlib_to_file(data, size, memfd)) {
    err = errno;
    goto error_close_memfd;
  }
  loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    err = errno;
    goto error_close_memfd;
  }
  if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
    if (errno != EBUSY) {
      err = errno;
      goto error_close_loop;
    }
    ioctl(loopfd, LOOP_CLR_FD, 0);
    usleep(1000);
    if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
      err = errno;
      goto error_close_loop;
    }
  }
  close(memfd);
  *loopfd_p = loopfd;
  return 0;

error_close_loop:
  close(loopfd);
error_close_memfd:
  close(memfd);
error:
  errno = err;
  return -1;
}

static void reset_loop_device(const char* loopname)
{
  int loopfd = open(loopname, O_RDWR);
  if (loopfd == -1) {
    return;
  }
  if (ioctl(loopfd, LOOP_CLR_FD, 0)) {
  }
  close(loopfd);
}

static long syz_mount_image(volatile long fsarg, volatile long dir,
                            volatile long flags, volatile long optsarg,
                            volatile long change_dir,
                            volatile unsigned long size, volatile long image)
{
  unsigned char* data = (unsigned char*)image;
  int res = -1, err = 0, need_loop_device = !!size;
  char* mount_opts = (char*)optsarg;
  char* target = (char*)dir;
  char* fs = (char*)fsarg;
  char* source = NULL;
  char loopname[64];
  if (need_loop_device) {
    int loopfd;
    memset(loopname, 0, sizeof(loopname));
    snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
    if (setup_loop_device(data, size, loopname, &loopfd) == -1)
      return -1;
    close(loopfd);
    source = loopname;
  }
  mkdir(target, 0777);
  char opts[256];
  memset(opts, 0, sizeof(opts));
  if (strlen(mount_opts) > (sizeof(opts) - 32)) {
  }
  strncpy(opts, mount_opts, sizeof(opts) - 32);
  if (strcmp(fs, "iso9660") == 0) {
    flags |= MS_RDONLY;
  } else if (strncmp(fs, "ext", 3) == 0) {
    bool has_remount_ro = false;
    char* remount_ro_start = strstr(opts, "errors=remount-ro");
    if (remount_ro_start != NULL) {
      char after = *(remount_ro_start + strlen("errors=remount-ro"));
      char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
      has_remount_ro = ((before == '\0' || before == ',') &&
                        (after == '\0' || after == ','));
    }
    if (strstr(opts, "errors=panic") || !has_remount_ro)
      strcat(opts, ",errors=continue");
  } else if (strcmp(fs, "xfs") == 0) {
    strcat(opts, ",nouuid");
  } else if (strncmp(fs, "gfs2", 4) == 0 &&
             (strstr(opts, "errors=panic") || strstr(opts, "debug"))) {
    strcat(opts, ",errors=withdraw");
  }
  res = mount(source, target, fs, flags, opts);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  res = open(target, O_RDONLY | O_DIRECTORY);
  if (res == -1) {
    err = errno;
    goto error_clear_loop;
  }
  if (change_dir) {
    res = chdir(target);
    if (res == -1) {
      err = errno;
    }
  }

error_clear_loop:
  if (need_loop_device)
    reset_loop_device(loopname);
  errno = err;
  return res;
}

static void setup_gadgetfs();
static void setup_binderfs();
static void setup_fusectl();
static void sandbox_common_mount_tmpfs(void)
{
  write_file("/proc/sys/fs/mount-max", "100000");
  if (mkdir("./syz-tmp", 0777))
    exit(1);
  if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot", 0777))
    exit(1);
  if (mkdir("./syz-tmp/newroot/dev", 0700))
    exit(1);
  unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
  if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/proc", 0700))
    exit(1);
  if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL))
    exit(1);
  if (mkdir("./syz-tmp/newroot/selinux", 0700))
    exit(1);
  const char* selinux_path = "./syz-tmp/newroot/selinux";
  if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) {
    if (errno != ENOENT)
      exit(1);
    if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) &&
        errno != ENOENT)
      exit(1);
  }
  if (mkdir("./syz-tmp/newroot/sys", 0700))
    exit(1);
  if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL))
    exit(1);
  if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL,
            bind_mount_flags, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mount("/proc/sys/fs/binfmt_misc",
            "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags,
            NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/newroot/syz-inputs", 0700))
    exit(1);
  if (mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL,
            bind_mount_flags | MS_RDONLY, NULL) &&
      errno != ENOENT)
    exit(1);
  if (mkdir("./syz-tmp/pivot", 0777))
    exit(1);
  if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
    if (chdir("./syz-tmp"))
      exit(1);
  } else {
    if (chdir("/"))
      exit(1);
    if (umount2("./pivot", MNT_DETACH))
      exit(1);
  }
  if (chroot("./newroot"))
    exit(1);
  if (chdir("/"))
    exit(1);
  setup_gadgetfs();
  setup_binderfs();
  setup_fusectl();
}

static void setup_gadgetfs()
{
  if (mkdir("/dev/gadgetfs", 0777)) {
  }
  if (mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL)) {
  }
}

static void setup_fusectl()
{
  if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
  }
}

static void setup_binderfs()
{
  if (mkdir("/dev/binderfs", 0777)) {
  }
  if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  if (getppid() == 1)
    exit(1);
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = (200 << 20);
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 32 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
  if (unshare(CLONE_NEWNS)) {
  }
  if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
  typedef struct {
    const char* name;
    const char* value;
  } sysctl_t;
  static const sysctl_t sysctls[] = {
      {"/proc/sys/kernel/shmmax", "16777216"},
      {"/proc/sys/kernel/shmall", "536870912"},
      {"/proc/sys/kernel/shmmni", "1024"},
      {"/proc/sys/kernel/msgmax", "8192"},
      {"/proc/sys/kernel/msgmni", "1024"},
      {"/proc/sys/kernel/msgmnb", "1024"},
      {"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
  };
  unsigned i;
  for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
    write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static void drop_caps(void)
{
  struct __user_cap_header_struct cap_hdr = {};
  struct __user_cap_data_struct cap_data[2] = {};
  cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
  cap_hdr.pid = getpid();
  if (syscall(SYS_capget, &cap_hdr, &cap_data))
    exit(1);
  const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
  cap_data[0].effective &= ~drop;
  cap_data[0].permitted &= ~drop;
  cap_data[0].inheritable &= ~drop;
  if (syscall(SYS_capset, &cap_hdr, &cap_data))
    exit(1);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  sandbox_common();
  drop_caps();
  initialize_netdevices_init();
  if (unshare(CLONE_NEWNET)) {
  }
  write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
  initialize_tun();
  initialize_netdevices();
  sandbox_common_mount_tmpfs();
  loop();
  exit(1);
}

static void close_fds()
{
  for (int fd = 3; fd < MAX_FDS; fd++)
    close(fd);
}

static const char* setup_binfmt_misc()
{
  if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0) &&
      errno != EBUSY) {
    return NULL;
  }
  if (!write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz0:M:0:\x01::./file0:") ||
      !write_file("/proc/sys/fs/binfmt_misc/register",
                  ":syz1:M:1:\x02::./file0:POC"))
    return "write(/proc/sys/fs/binfmt_misc/register) failed";
  return NULL;
}

static const char* setup_usb()
{
  if (chmod("/dev/raw-gadget", 0666))
    return "failed to chmod /dev/raw-gadget";
  return NULL;
}

static void setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

#define SWAP_FILE "./swap-file"
#define SWAP_FILE_SIZE (128 * 1000 * 1000)

static const char* setup_swap()
{
  swapoff(SWAP_FILE);
  unlink(SWAP_FILE);
  int fd = open(SWAP_FILE, O_CREAT | O_WRONLY | O_CLOEXEC, 0600);
  if (fd == -1)
    return "swap file open failed";
  fallocate(fd, FALLOC_FL_ZERO_RANGE, 0, SWAP_FILE_SIZE);
  close(fd);
  char cmdline[64];
  sprintf(cmdline, "mkswap %s", SWAP_FILE);
  if (runcmdline(cmdline))
    return "mkswap failed";
  if (swapon(SWAP_FILE, SWAP_FLAG_PREFER) == 1)
    return "swapon failed";
  return NULL;
}

uint64_t r[1] = {0xffffffffffffffff};

void loop(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  syz_mount_image$ext4 arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 78 74 34 00} (length 0x5)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x1208002 (8 bytes)
  //    opts: ptr[in, fs_options[ext4_options]] {
  //      fs_options[ext4_options] {
  //        elems: array[fs_opt_elem[ext4_options]] {
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              grpquota: buffer: {67 72 70 71 75 6f 74 61} (length 0x8)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              delalloc: buffer: {64 65 6c 61 6c 6c 6f 63} (length 0x8)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              resuid: fs_opt["resuid", fmt[hex, uid]] {
  //                name: buffer: {72 65 73 75 69 64} (length 0x6)
  //                eq: const = 0x3d (1 bytes)
  //                val: uid (resource)
  //              }
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              debug: buffer: {64 65 62 75 67} (length 0x5)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f
  //              63 6b} (length 0xe)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              bsddf: buffer: {62 73 64 64 66} (length 0x5)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              nomblk_io_submit: buffer: {6e 6f 6d 62 6c 6b 5f 69 6f 5f 73 75
  //              62 6d 69 74} (length 0x10)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //          fs_opt_elem[ext4_options] {
  //            elem: union ext4_options {
  //              noauto_da_alloc: buffer: {6e 6f 61 75 74 6f 5f 64 61 5f 61 6c
  //              6c 6f 63} (length 0xf)
  //            }
  //            comma: const = 0x2c (1 bytes)
  //          }
  //        }
  //        common: array[fs_opt_elem[fs_options_common]] {
  //        }
  //        null: const = 0x0 (1 bytes)
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x5d8 (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x5d8)
  //    }
  //  ]
  //  returns fd_dir
  NONFAILING(memcpy((void*)0x200000000580, "ext4\000", 5));
  NONFAILING(memcpy((void*)0x200000001480, "./file0\000", 8));
  NONFAILING(memcpy((void*)0x200000000100, "grpquota", 8));
  NONFAILING(*(uint8_t*)0x200000000108 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000109, "delalloc", 8));
  NONFAILING(*(uint8_t*)0x200000000111 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000112, "resuid", 6));
  NONFAILING(*(uint8_t*)0x200000000118 = 0x3d);
  NONFAILING(sprintf((char*)0x200000000119, "0x%016llx", (long long)0));
  NONFAILING(*(uint8_t*)0x20000000012b = 0x2c);
  NONFAILING(memcpy((void*)0x20000000012c, "debug", 5));
  NONFAILING(*(uint8_t*)0x200000000131 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000132, "dioread_nolock", 14));
  NONFAILING(*(uint8_t*)0x200000000140 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000141, "bsddf", 5));
  NONFAILING(*(uint8_t*)0x200000000146 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000147, "nomblk_io_submit", 16));
  NONFAILING(*(uint8_t*)0x200000000157 = 0x2c);
  NONFAILING(memcpy((void*)0x200000000158, "noauto_da_alloc", 15));
  NONFAILING(*(uint8_t*)0x200000000167 = 0x2c);
  NONFAILING(*(uint8_t*)0x200000000168 = 0);
  NONFAILING(memcpy(
      (void*)0x2000000005c0,
      "\x78\x9c\xec\xdd\xcf\x6f\x14\x55\x1c\x00\xf0\xef\x6c\x7f\xd0\x52\xb4\x85"
      "\x18\x15\x0f\xd2\xc4\x18\x48\x94\x96\x16\x30\xc4\x78\x80\xab\x21\x0d\xfe"
      "\x88\x17\x2f\x56\x5a\x10\x29\xd0\xd0\x1a\x2d\x9a\x50\x12\xbc\x98\x18\x2f"
      "\xc6\x98\x78\xf2\x20\xfe\x17\x4a\xe4\xca\x49\x4f\x1e\xbc\x78\x32\x24\x44"
      "\x0d\x47\x13\xd7\xcc\x76\xa6\x74\xdb\xd9\x96\x2e\x6d\xa7\x32\x9f\x4f\xb2"
      "\xf4\xcd\x7b\x3b\xbc\x37\xdd\x7e\xfb\xde\xbe\xbe\x37\x1b\x40\x65\x0d\xa6"
      "\xff\xd4\x22\xf6\x46\xc4\x74\x12\xd1\x9f\xcc\x2f\x96\x75\x46\x56\x38\xb8"
      "\xf0\xbc\x7b\x7f\x7f\x72\x3a\x7d\x24\x51\xaf\xbf\xf1\x67\x12\x49\x96\x97"
      "\x3f\x3f\xc9\xbe\xf6\x65\x27\xf7\x44\xc4\xcf\x3f\x25\xb1\xa7\x63\x65\xbd"
      "\x33\x73\x57\xce\x8f\x4f\x4d\x4d\x5e\xce\x8e\x87\x67\x2f\x4c\x0f\xcf\xcc"
      "\x5d\x39\x78\xee\xc2\xf8\xd9\xc9\xb3\x93\x17\x47\x5f\x1a\x3d\x76\xf4\xc8"
      "\xd1\x63\x23\x87\xda\xba\xae\xab\x05\x79\x27\xaf\xbf\xff\x61\xff\x67\x63"
      "\x6f\x7f\xf7\xcd\x3f\xc9\xc8\xf7\xbf\x8d\x25\x71\x3c\x5e\xcd\x9e\xb8\xf4"
      "\x3a\x36\xca\x60\x0c\x36\xbe\x27\xc9\xca\xa2\xbe\x63\x1b\x5d\x59\x49\x3a"
      "\xb2\x9f\x93\xa5\x2f\x71\xd2\x59\x62\x83\x58\x97\xfc\xf5\xeb\x8a\x88\xa7"
      "\xa2\x3f\x3a\xe2\xfe\x8b\xd7\x1f\x9f\xbe\x56\x6a\xe3\x80\x4d\x55\x4f\x22"
      "\xea\x40\x45\x25\xe2\x1f\x2a\x2a\x1f\x07\xe4\xef\xed\x97\xbf\x0f\xae\x95"
      "\x32\x2a\x01\xb6\xc2\xdd\x13\x0b\x13\x00\x2b\xe3\xbf\x73\x61\x6e\x30\x7a"
      "\x1a\x73\x03\x3b\xef\x25\xb1\x74\x5a\x27\x89\x88\xf6\x66\xe6\x9a\xed\x8a"
      "\x88\xdb\xb7\xc6\xae\x9f\xb9\x35\x76\x3d\x36\x69\x1e\x0e\x28\x36\x7f\x2d"
      "\x22\x9e\x2e\x8a\xff\xa4\x11\xff\x03\xd1\x13\x03\x8d\xf8\xaf\x35\xc5\x7f"
      "\x3a\x2e\x38\x95\x7d\x4d\xf3\x5f\x6f\xb3\xfe\xe5\x53\xc5\xe2\x1f\xb6\xce"
      "\x42\xfc\xf7\xac\x1a\xff\xd1\x22\xfe\xdf\x59\x12\xff\xef\xb6\x59\xff\xe0"
      "\xfd\xe4\x7b\xbd\x4d\xf1\xdf\xdb\xee\x25\x01\x00\x00\x00\x00\x00\x40\x65"
      "\xdd\x3c\x11\x11\x2f\x16\xfd\xfd\xbf\xb6\xb8\xfe\x27\x0a\xd6\xff\xf4\x45"
      "\xc4\xf1\x0d\xa8\x7f\x70\xd9\xf1\xca\xbf\xff\xd7\xee\x6c\x40\x35\x40\x81"
      "\xbb\x27\x22\x5e\x29\x5c\xff\x5b\xcb\x57\xff\x0e\x74\x64\xa9\xc7\x1a\xeb"
      "\x01\xba\x92\x33\xe7\xa6\x26\x0f\x45\xc4\xe3\x11\x71\x20\xba\x76\xa4\xc7"
      "\x23\xab\xd4\x71\xf0\xf3\x3d\x5f\xb7\x2a\x1b\xcc\xd6\xff\xe5\x8f\xb4\xfe"
      "\xdb\xd9\x5a\xc0\xac\x1d\x77\x3a\x77\x34\x9f\x33\x31\x3e\x3b\xfe\xb0\xd7"
      "\x0d\x44\xdc\xbd\x16\xf1\x4c\xe1\xfa\xdf\x64\xb1\xff\x4f\x0a\xfa\xff\xf4"
      "\xf7\xc1\xf4\x03\xd6\xb1\xe7\xf9\x1b\xa7\x5a\x95\xad\x1d\xff\xc0\x66\xa9"
      "\x7f\x1b\xb1\xbf\xb0\xff\xbf\x7f\xd7\x8a\x64\xf5\xfb\x73\x0c\x37\xc6\x03"
      "\xc3\xf9\xa8\x60\xa5\x67\x3f\xfe\xe2\x87\x56\xf5\xb7\x1b\xff\x6e\x31\x01"
      "\x0f\x2f\xed\xff\x77\xae\x1e\xff\x03\xc9\xd2\xfb\xf5\xcc\xac\xbf\x8e\xc3"
      "\x73\x9d\xf5\x56\x65\xed\x8e\xff\xbb\x93\x37\x1b\xb7\x9c\xe9\xce\xf2\x3e"
      "\x1a\x9f\x9d\xbd\x3c\x12\xd1\x9d\x9c\xec\x48\x73\x9b\xf2\x47\xd7\xdf\x66"
      "\x78\x14\xe5\xf1\x90\xc7\x4b\x1a\xff\x07\x9e\x5b\x7d\xfe\xaf\x68\xfc\xdf"
      "\x1b\x11\xf3\xcb\xfe\xef\xe4\xaf\xe6\x3d\xc5\xb9\x27\xff\xed\xfb\xbd\x55"
      "\x7b\x8c\xff\xa1\x3c\x69\xfc\x4f\xac\xab\xff\x5f\x7f\x62\xf4\xc6\xc0\x8f"
      "\xad\xea\x7f\xb0\xfe\xff\x48\xa3\xaf\x3f\x90\xe5\x98\xff\x83\x05\x5f\xe5"
      "\x61\xda\xdd\x9c\x5f\x10\x8e\x9d\x45\x45\x5b\xdd\x5e\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x78\x14\xd4\x22\x62\x57\x24\xb5\xa1\xc5\x74\xad\x36\x34\x14\xd1"
      "\x17\x11\x4f\xc4\xce\xda\xd4\xa5\x99\xd9\x17\xce\x5c\xfa\xe0\xe2\x44\x5a"
      "\xd6\xf8\xfc\xff\x5a\xfe\x49\xbf\xfd\x0b\xc7\x49\xfe\xf9\xff\x03\x4b\x8e"
      "\x47\x97\x1d\x1f\x8e\x88\xdd\x11\xf1\x65\x47\x6f\xe3\x78\xe8\xf4\xa5\xa9"
      "\x89\xb2\x2f\x1e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\xb6\x89\xbe\x16\xfb\xff\x53\x7f\x74\x94\xdd\x3a\x60\xd3\x75\x96\xdd"
      "\x00\xa0\x34\x05\xf1\xff\x4b\x19\xed\x00\xb6\x9e\xfe\x1f\xaa\x4b\xfc\x43"
      "\x75\x89\x7f\xa8\x2e\xf1\x0f\xd5\x25\xfe\xa1\xba\xc4\x3f\x54\x97\xf8\x87"
      "\xea\x12\xff\x00\x00\x00\x00\x00\xf0\x48\xd9\xbd\xef\xe6\xaf\x49\x44\xcc"
      "\xbf\xdc\xdb\x78\xa4\xba\xb3\xb2\xae\x52\x5b\x06\x6c\xb6\x5a\xd9\x0d\x00"
      "\x4a\xe3\x16\x3f\x50\x5d\x96\xfe\x40\x75\x79\x8f\x0f\x24\x6b\x94\xf7\xb4"
      "\x3c\x69\xad\x33\x57\x33\x7d\xfa\x21\x4e\x06\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x80\xca\xd9\xbf\xd7\xfe\x7f\xa8\x2a\xfb\xff\xa1\xba\xec\xff\x87"
      "\xea\xca\xf7\xff\xef\x2b\xb9\x1d\xc0\xd6\xf3\x1e\x1f\x88\x35\x76\xf2\x17"
      "\xee\xff\x5f\xf3\x2c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x60\x23\xcd"
      "\xcc\x5d\x39\x3f\x3e\x35\x35\x79\x59\xe2\xad\xed\xd1\x8c\xad\x4c\xd4\xeb"
      "\xf5\xab\xe9\x4f\xc1\x76\x69\xcf\xff\x3c\x91\x2f\x85\xdf\x2e\xed\x59\x96"
      "\xc8\xf7\xfa\x3d\xd8\x59\xe5\xfd\x4e\x02\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
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      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
      "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9a\xfd\x17\x00\x00\xff\xff\x16\x12"
      "\x24\xc5",
      1496));
  NONFAILING(syz_mount_image(
      /*fs=*/0x200000000580, /*dir=*/0x200000001480,
      /*flags=MS_STRICTATIME|MS_SILENT|MS_RELATIME|MS_NOSUID*/ 0x1208002,
      /*opts=*/0x200000000100, /*chdir=*/1, /*size=*/0x5d8,
      /*img=*/0x2000000005c0));
  //  lchown arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //    uid: uid (resource)
  //    gid: gid (resource)
  //  ]
  NONFAILING(memcpy((void*)0x2000000006c0, "./file0\000", 8));
  syscall(__NR_lchown, /*file=*/0x2000000006c0ul, /*uid=*/0, /*gid=*/0xee01);
  //  quotactl$Q_QUOTAON arguments: [
  //    cmd: quota_cmd_quota_on = 0xffffffff80000201 (8 bytes)
  //    special: ptr[in, blockdev_filename] {
  //      union blockdev_filename {
  //        loop: loop_filename {
  //          prefix: buffer: {2f 64 65 76 2f 6c 6f 6f 70} (length 0x9)
  //          id: proc = 0x0 (1 bytes)
  //          z: const = 0x0 (1 bytes)
  //        }
  //      }
  //    }
  //    id: uid (resource)
  //    addr: nil
  //  ]
  NONFAILING(memcpy((void*)0x200000000180, "/dev/loop", 9));
  NONFAILING(*(uint8_t*)0x200000000189 = 0x30);
  NONFAILING(*(uint8_t*)0x20000000018a = 0);
  syscall(__NR_quotactl, /*cmd=Q_QUOTAON_GRP*/ 0xffffffff80000201ul,
          /*special=*/0x200000000180ul, /*id=*/0, /*addr=*/0ul);
  //  mprotect arguments: [
  //    addr: VMA[0x3000]
  //    len: len = 0x3000 (8 bytes)
  //    prot: mmap_prot = 0x9 (8 bytes)
  //  ]
  syscall(__NR_mprotect, /*addr=*/0x200000000000ul, /*len=*/0x3000ul,
          /*prot=PROT_SEM|PROT_READ*/ 9ul);
  //  openat$cgroup_ro arguments: [
  //    fd: fd_cgroup (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {68 75 67 65 74 6c 62 2e 31 47 42 2e 75 73 61 67 65 5f 69 6e
  //      5f 62 79 74 65 73 00} (length 0x1b)
  //    }
  //    flags: const = 0x275a (4 bytes)
  //    mode: const = 0x0 (2 bytes)
  //  ]
  //  returns fd
  NONFAILING(
      memcpy((void*)0x200000000180, "hugetlb.1GB.usage_in_bytes\000", 27));
  res = syscall(__NR_openat, /*fd=*/(intptr_t)-1, /*file=*/0x200000000180ul,
                /*flags=*/0x275a, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  mmap arguments: [
  //    addr: VMA[0xb36000]
  //    len: len = 0xb36000 (8 bytes)
  //    prot: mmap_prot = 0xa (8 bytes)
  //    flags: mmap_flags = 0x28011 (8 bytes)
  //    fd: fd (resource)
  //    offset: intptr = 0x0 (8 bytes)
  //  ]
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0xb36000ul,
          /*prot=PROT_SEM|PROT_WRITE*/ 0xaul,
          /*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul,
          /*fd=*/r[0], /*offset=*/0ul);
  //  syz_mount_image$exfat arguments: [
  //    fs: ptr[in, buffer] {
  //      buffer: {65 78 66 61 74 00} (length 0x6)
  //    }
  //    dir: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 32 00} (length 0x8)
  //    }
  //    flags: mount_flags = 0x3000cd0 (8 bytes)
  //    opts: ptr[inout, array[ANYUNION]] {
  //      array[ANYUNION] {
  //      }
  //    }
  //    chdir: int8 = 0x1 (1 bytes)
  //    size: len = 0x151a (8 bytes)
  //    img: ptr[in, buffer] {
  //      buffer: (compressed buffer with length 0x151a)
  //    }
  //  ]
  //  returns fd_dir
  NONFAILING(memcpy((void*)0x200000000240, "exfat\000", 6));
  NONFAILING(memcpy((void*)0x2000000005c0, "./file2\000", 8));
  NONFAILING(memcpy(
      (void*)0x200000003f40,
      "\x78\x9c\xec\xdc\x0b\xb8\x4e\xd5\xd6\x38\xf0\x31\xe6\x9c\x8b\x4d\x2e\x6f"
      "\x92\xfb\x1a\x73\x2c\xde\xe4\x32\x49\x92\x50\x92\x8a\x24\x49\x42\x72\x4f"
      "\x48\x92\x24\x49\x12\x9b\xdc\x92\x90\x84\x5c\x77\x92\x7b\xc8\x3d\xed\xb4"
      "\xdd\xef\x97\xdc\x93\x76\x8e\x24\x49\x42\x72\x0b\xf3\xff\x6c\xe9\xef\x74"
      "\x4e\x3d\x9d\xce\xd7\xf7\x39\xdf\xb7\xc7\xef\x79\xd6\x63\x0e\x6b\x8d\xf1"
      "\x8e\xb5\xc7\x7e\xf7\xbb\xd6\x7a\x9e\xbd\xbf\xed\x34\xb8\x4a\xfd\xaa\x95"
      "\xeb\x30\x33\xfc\x3b\xf4\x2f\x0b\xfc\xf9\x9f\x44\x00\x48\x00\x80\x7e\x00"
      "\x90\x1d\x00\x02\x00\x28\x93\xa3\x4c\x8e\xb4\xfd\x99\x34\x26\xfe\x5b\x2f"
      "\x22\xfe\x9b\xd4\x9d\x7a\xa5\x3b\x10\x57\x92\xcc\x3f\x7d\x93\xf9\xa7\x6f"
      "\x32\xff\xf4\x4d\xe6\x9f\xbe\xc9\xfc\xd3\x37\x99\x7f\xfa\x26\xf3\x4f\xdf"
      "\x64\xfe\x42\xa4\x6b\xd3\xf3\x5e\x2d\x5b\xfa\xdd\xe4\xf9\xff\xff\x72\xea"
      "\xbf\x92\x2c\x9f\xff\xe9\x02\xfe\xde\x0e\x99\xff\xff\x35\xfa\x4f\x1d\x2d"
      "\xf3\x4f\xdf\x64\xfe\xe9\x9b\xcc\x3f\x7d\x93\xf9\xa7\x3f\x97\x6f\xc1\x82"
      "\x2b\xda\x87\xb8\xf2\xe4\xfd\x9f\xbe\xc9\xfc\x85\x48\xd7\xfe\xf2\x67\xca"
      "\x6b\x4f\x5f\xe9\x67\xda\xb2\xfd\x89\x4d\x08\x21\x84\x10\x42\x08\x21\x84"
      "\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08"
      "\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10"
      "\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21"
      "\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42"
      "\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84"
      "\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08"
      "\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\xf8\x1f\x70\xda\x5f\x66"
      "\x00\xe0\x97\xf5\x95\xee\x4b\x08\x21\x84\x10\x42\x08\x21\x84\x10\x7f\x1d"
      "\xff\xfe\x95\xee\x40\x08\x21\x84\x10\x42\x08\x21\x84\x10\xff\xfd\x10\x14"
      "\x68\x30\x10\x40\x06\xc8\x08\x09\x90\x09\x32\xc3\x55\x90\x05\xb2\x42\x36"
      "\xc8\x0e\x31\xb8\x1a\x72\xc0\x35\x90\x13\xae\x85\x5c\x90\x1b\xf2\x40\x5e"
      "\xc8\x07\xf9\xa1\x00\x84\x40\x60\x81\x21\x82\x82\x50\x08\xe2\x70\x1d\x14"
      "\x86\xeb\xa1\x08\x14\x85\x62\x50\x1c\x1c\x94\x80\x92\x70\x03\x94\x82\x1b"
      "\xa1\x34\xdc\x04\x65\xe0\x66\x28\x0b\xb7\x40\x39\x28\x7f\xf1\x35\xd3\xdc"
      "\x0e\x95\xe0\x0e\xa8\x0c\x77\xc2\x5d\x70\x37\x54\x81\xaa\x70\x0f\x54\x83"
      "\x7b\xa1\x3a\xdc\x07\x35\xe0\x7e\xa8\x09\x0f\x40\x2d\x78\x10\x6a\xc3\x43"
      "\x50\x07\xea\x42\x3d\x78\x18\xea\xc3\x23\xd0\x00\x1a\x42\x23\x68\x0c\x4d"
      "\xa0\x29\x34\xfb\x83\xfc\xa4\xec\xbf\x95\xff\x22\x74\x85\x97\xa0\x1b\x74"
      "\x87\x44\xe8\x01\x3d\xe1\x65\xe8\x05\xbd\xa1\x0f\xf4\x85\x7e\xf0\x0a\xf4"
      "\x87\x57\x61\x00\xbc\x06\x03\x61\x10\x0c\x86\xd7\x61\x08\xbc\x01\x43\xe1"
      "\x4d\x18\x06\xc3\x61\x04\xbc\x05\x23\x61\x14\x8c\x86\x31\x30\x16\xc6\x41"
      "\x12\xbc\x0d\xe3\xe1\x1d\x98\x00\xef\x3e\x92\x15\x26\xc1\x64\x98\x02\x53"
      "\x61\x1a\x4c\x87\xf7\x60\x06\xcc\x84\x59\xf0\x3e\xcc\x86\x39\x30\x17\x92"
      "\x32\xcd\x87\x05\xb0\x10\x3e\x80\x45\xf0\x21\x24\xc3\x47\xb0\x18\x3e\x86"
      "\x14\x58\x02\x4b\x61\x19\x2c\x87\x15\xb0\x12\x56\xc1\x6a\x58\x03\x6b\x61"
      "\x1d\xac\x87\x0d\xb0\x11\x36\xc1\x66\xf8\x04\xb6\xc0\x56\xd8\x06\xdb\x61"
      "\x07\xec\x84\x5d\xf0\x29\xec\x86\xcf\x60\x0f\x7c\x0e\xa9\xf8\xc5\x9f\xcc"
      "\x3f\xf5\xeb\x7c\xe8\x8c\x80\x80\x0a\x15\x1a\x34\x98\x01\x33\x60\x02\x26"
      "\x60\x66\xcc\x8c\x59\x30\x0b\x66\xc3\x6c\x18\xc3\x18\xe6\xc0\x1c\x98\x13"
      "\x73\x62\x2e\xcc\x85\x79\x30\x0f\x26\x62\x3e\x2c\x80\x05\x90\x90\x90\x91"
      "\xb1\x20\x16\xc4\x38\xc6\xb1\x30\x16\xc6\x22\x58\x04\x8b\x61\x31\x74\xe8"
      "\xb0\x24\x96\xc4\x52\x78\xde\x7b\x5f\x1a\xcb\x60\x19\x2c\x8b\x65\xb1\x1c"
      "\x96\xc7\xf2\x78\x2b\xde\x8a\x15\xb1\x22\x56\xc2\x4a\x58\x19\x2b\xe3\x5d"
      "\x78\x17\x56\xc1\x2a\x78\x0f\xde\x83\xf7\x62\x75\xac\x8e\x35\xb0\x06\xd6"
      "\xc4\x9a\x58\x0b\x6b\x61\x6d\xac\x8d\x75\xb0\x0e\xd6\xc3\x7a\x58\x1f\xeb"
      "\x63\x03\x6c\x80\x8d\xb0\x11\x36\xc1\x26\xd8\x0c\x9b\x61\x73\x6c\x8e\x2d"
      "\xb0\x05\xb6\xc2\x56\xd8\x1a\x5b\x63\x1b\x6c\x83\x6d\xb1\x2d\xb6\xc3\x76"
      "\xd8\x1e\xdb\x63\x07\xec\x80\x1d\xb1\x23\x76\xc2\x4e\xd8\x19\x5f\xc0\x17"
      "\xf0\x45\x7c\x11\x5f\xc2\x97\xb0\x3b\xde\xa5\x7a\x60\x4f\xec\x89\xbd\xb0"
      "\x17\xf6\xc1\xbe\xd8\x17\x5f\xc1\xfe\xf8\x2a\xbe\x8a\xaf\xe1\x40\x1c\x84"
      "\x83\xf1\x75\x7c\x1d\xdf\xc0\xa1\x78\x12\x87\xe1\x70\x1c\x81\x23\xb0\xa2"
      "\x1a\x85\xa3\x71\x0c\xb2\x1a\x87\x49\x98\x84\x19\x61\x3c\x4e\xc0\x09\x38"
      "\x11\x27\xe1\x24\x9c\x82\x53\x71\x1a\x4e\x37\x80\x33\x70\x26\xce\xc4\xf7"
      "\x71\x36\xce\xc1\x39\x38\x0f\xe7\xe1\x02\x5c\x88\x0b\x71\x11\x7e\x88\xc9"
      "\x98\x8c\x8b\xf1\x14\xa6\xe0\x12\x5c\x8a\xcb\x70\x39\xae\xc0\xe5\xb8\x0a"
      "\x57\xe3\x2a\x5c\x8b\xeb\x70\x2d\x6e\xc0\x0d\xb8\x09\x37\xe1\x27\xf8\x09"
      "\x6e\xc5\xad\xb8\x1d\xb7\xe3\x4e\xdc\x89\x9f\xe2\xa7\xf8\x19\x7e\x86\x03"
      "\x31\x15\x53\x71\x2f\xee\xc5\x7d\xb8\x0f\xf7\xe3\x7e\x3c\x80\x07\xf0\x20"
      "\x1e\xc4\x43\x78\x08\x0f\xe3\x61\x3c\x82\x47\xf0\x28\x1e\xc3\xe3\x78\x0c"
      "\x4f\xe0\x09\x3c\x89\xa7\xf0\x34\x00\x9c\xc5\xb3\x78\x0e\xcf\xe1\x05\xbc"
      "\x90\xf6\xe6\x57\x69\x8c\x32\x2a\x83\xca\xa0\x12\x54\x82\xca\xac\x32\xab"
      "\x2c\x2a\x8b\xca\xa6\xb2\xa9\x98\x8a\xa9\x1c\x2a\x87\xca\xa9\x72\xaa\x5c"
      "\x2a\x97\xca\xa3\xf2\xa8\x7c\x2a\x9f\x2a\xa0\x0a\x28\x52\xa4\x58\x45\xaa"
      "\xa0\x2a\xa8\xe2\x2a\xae\x0a\xab\xc2\xaa\x88\x2a\xa2\x8a\xa9\x62\xca\x29"
      "\xa7\x4a\xaa\x92\xaa\x94\x2a\xa5\x4a\xab\xd2\xaa\x8c\xba\x59\x95\x55\xb7"
      "\xa8\x72\xaa\xbc\x6a\xe9\x6e\x55\xb7\xaa\x8a\xaa\x95\xab\xa4\xee\x50\x95"
      "\x55\x65\x75\x97\xba\x5b\x55\x51\x55\x55\x55\x55\x4d\x55\x53\xd5\x55\x75"
      "\x55\x43\xd5\x50\x35\x55\x4d\x55\x4b\x3d\xa8\x6a\xab\x1e\xd8\x07\xeb\xaa"
      "\xb4\xc9\xd4\x57\x83\xb0\x81\x1a\x8c\x8d\x54\x63\xd5\x44\x35\x55\x6f\xe0"
      "\xa3\xaa\xb9\x1a\x8a\x2d\x54\x4b\xd5\x4a\x3d\xae\x86\xe3\x30\x6c\xa3\x9a"
      "\xbb\xb6\xea\x29\xd5\x4e\x8d\xc6\xf6\xea\x19\x35\x06\x9f\x55\x1d\xd5\x38"
      "\xec\xa4\x9e\x57\x9d\xd5\x0b\xaa\x8b\x7a\x51\x75\x55\x2d\x5c\x37\xd5\x5d"
      "\x4d\xc4\x1e\xaa\xa7\x9a\x82\xbd\x54\x6f\xd5\x47\xf5\x55\x33\xf0\x6e\x95"
      "\x36\xb1\x2a\xea\x35\xf5\x62\xc6\x41\x6a\xb0\x7a\x5d\x2d\xc0\x37\xd4\x50"
      "\xf5\xa6\x1a\xa6\x86\xab\x11\xea\x2d\x35\x52\x8d\x52\xa3\xd5\x18\x35\x56"
      "\x8d\x53\x49\xea\x6d\x35\x5e\xbd\xa3\x26\xa8\x77\xd5\x44\x35\x49\x4d\x56"
      "\x53\xd4\x54\x35\x4d\x4d\x57\xef\xa9\x19\x6a\xa6\x9a\xa5\xde\x57\xb3\xd5"
      "\x1c\x0d\x6a\x9e\x9a\xaf\x16\xa8\x85\xea\x03\xb5\x48\x7d\xa8\x92\xd5\x47"
      "\x6a\xb1\xfa\x58\xa5\xa8\x25\x6a\xa9\x5a\xa6\x96\xab\x15\x6a\xa5\x5a\xa5"
      "\x56\xab\x35\x6a\xad\x5a\xa7\xd6\xab\x0d\x6a\xa3\xda\xa4\x36\xab\x4f\xd4"
      "\x16\xb5\x55\x6d\x53\xdb\xd5\x0e\xb5\x53\xed\x52\x9f\xaa\xdd\xea\x33\xb5"
      "\x47\x7d\xae\x52\xd5\x17\x6a\xaf\xfa\x9b\xda\xa7\xbe\x54\xfb\xd5\x57\xea"
      "\x80\xfa\x5a\x1d\x54\xdf\xa8\x43\xea\x5b\x75\x58\x7d\xa7\x8e\xa8\xef\xd5"
      "\x51\x75\x4c\x1d\x57\x3f\xa8\x13\xea\x47\x75\x52\x9d\x52\xa7\xd5\x19\x75"
      "\x56\xfd\xa4\xce\xa9\xf3\xea\x82\xf2\x0a\x34\x6a\xa5\xb5\x36\x3a\xd0\x19"
      "\x74\x46\x9d\xa0\x33\xe9\xcc\xfa\x2a\x9d\x45\x67\xd5\xd9\x74\x76\x1d\xd3"
      "\x57\xeb\x1c\xfa\x1a\x9d\x53\x5f\xab\x73\xe9\xdc\x3a\x8f\xc9\xab\xf3\xe9"
      "\xfc\xba\x80\x0e\x35\x69\xab\x59\x47\xba\xa0\x2e\xa4\xe3\xfa\x3a\x5d\x58"
      "\x5f\xaf\x8b\xe8\xa2\xba\x98\x2e\xae\x9d\x2e\xa1\x4b\xea\x1b\x74\x29\x7d"
      "\xa3\x2e\xad\x6f\xd2\x65\xf4\xcd\xba\xac\xbe\x45\x97\xd3\xe5\x75\x05\x0f"
      "\xfa\x36\x5d\x51\xdf\xae\x2b\xe9\x3b\x74\x65\x7d\xa7\xce\x04\x00\x55\x74"
      "\x55\x7d\x8f\xae\xa6\xef\xd5\xd5\xf5\x7d\xba\x86\xbe\x5f\xd7\xd4\x0f\xe8"
      "\x5a\xfa\x41\x5d\x5b\x3f\xa4\xeb\xe8\xba\xba\x9e\x7e\x58\xd7\xd7\x8f\xe8"
      "\x06\xba\xa1\x6e\xa4\x1b\xeb\x26\xba\xa9\x6e\xa6\x1f\xd5\xcd\xf5\x63\xba"
      "\x85\x6e\xa9\x5b\xe9\xc7\x75\x6b\xfd\x84\x6e\xa3\x9f\xd4\x6d\xf5\x53\xba"
      "\x9d\x7e\x5a\xb7\xd7\xcf\xe8\x0e\xfa\x59\xdd\x51\x3f\xa7\x3b\xe9\xe7\x75"
      "\x67\xfd\x82\xee\xa2\xcf\xeb\x0b\xda\xeb\x6e\xba\xbb\x4e\xd4\x3d\x74\x4f"
      "\xfd\xb2\xee\xa5\x7b\xeb\x3e\xba\xaf\xee\xa7\x5f\xd1\xfd\xf5\xab\x7a\x80"
      "\x7e\x4d\x0f\xd4\x83\xf4\x60\xfd\xba\x1e\xa2\xdf\xd0\x43\xf5\x9b\x7a\x98"
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      "\xc9\xfc\x11\x2f\xe6\x8f\x39\x85\x97\xf0\x52\x5e\xc6\xcb\x79\x05\xaf\xe4"
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      "\x2d\xbc\x95\xb7\xf1\x76\xde\xc1\x3b\x79\x17\x7f\xca\xbb\xf9\x33\xde\xc3"
      "\x9f\x73\x2a\x7f\xc1\x7b\xf9\x6f\xbc\x8f\xbf\xe4\xfd\xfc\x15\x1f\xe0\xaf"
      "\xf9\x20\x7f\xc3\x87\xf8\x5b\x3e\xcc\xdf\xf1\x11\xfe\x9e\x8f\xf2\x31\x3e"
      "\xce\x3f\xf0\x09\xfe\x91\x4f\xf2\x29\x3e\xcd\x67\xf8\x2c\xff\xc4\xe7\xf8"
      "\x3c\x5f\x60\xcf\x10\x61\xa4\x22\x1d\x99\x28\x88\x32\x44\x19\xa3\x84\x28"
      "\x53\x94\x39\xba\x2a\xca\x12\x65\x8d\xb2\x45\xd9\xa3\x58\x74\x75\x94\x23"
      "\xba\x26\xca\x19\x5d\x1b\xe5\x8a\x72\x47\x79\xa2\xbc\x51\xbe\x28\x7f\x54"
      "\x20\x0a\x23\x8a\x6c\xc4\x51\x14\x15\x8c\x0a\x45\xf1\xe8\xba\xa8\x70\x74"
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      "\x37\x46\xa5\xa3\x9b\xa2\x32\xd1\xcd\x51\xd9\xe8\x96\xa8\x5c\x54\x3e\xaa"
      "\x10\xdd\x1a\xdd\x16\x55\x8c\x6e\x8f\x2a\x45\x77\x44\x95\xa3\x3b\xa3\xbb"
      "\xa2\xbb\xa3\x2a\x51\xd5\xe8\x9e\xa8\x5a\x74\x6f\x54\x3d\xba\x2f\xaa\x11"
      "\xdd\x1f\x95\x8e\x1e\x88\x6a\x45\x0f\x46\xb5\xa3\x87\xa2\x3a\x51\xdd\xa8"
      "\x5e\xf4\x70\x54\x3f\x7a\x24\x6a\x10\x35\x8c\x1a\x45\x8d\xa3\x26\x51\xd3"
      "\xa8\x59\xf4\x68\xd4\x3c\x7a\x2c\x6a\x11\xb5\x8c\x5a\x45\x8f\x47\xad\xa3"
      "\x27\xa2\x36\xd1\x93\x51\xdb\xe8\xa9\xa8\x5d\xf4\xf4\xe5\xfd\x45\x83\x9f"
      "\x3f\x4d\xff\x61\x7f\x62\xd4\x23\xd2\x97\x9e\x90\xdd\xa7\xe7\xc7\x17\xc4"
      "\x17\xc6\x3f\x88\x2f\x8a\x7f\x18\x4f\x8e\x7f\x14\x5f\x1c\xff\x38\x9e\x12"
      "\x5f\x12\x5f\x1a\x5f\x16\x5f\x1e\x5f\x11\x5f\x19\x5f\x15\x5f\x1d\x5f\x13"
      "\x5f\x1b\x5f\x17\x5f\x1f\xdf\x10\xdf\x18\xdf\x14\xf7\xbe\x6a\x46\x70\x98"
      "\x76\x23\x0c\xc6\x05\x2e\x83\xcb\xe8\x12\x5c\x26\x97\xd9\x5d\xe5\xb2\xb8"
      "\xac\x2e\x9b\xcb\xee\x62\xee\x6a\x97\xc3\x5d\xe3\x72\xba\x6b\x5d\x2e\x97"
      "\xdb\xe5\x71\x79\x5d\x3e\x97\xdf\x15\x70\xa1\x23\x67\x1d\xbb\xc8\x15\x74"
      "\x85\x5c\xdc\x5d\xe7\x0a\xbb\xeb\x5d\x11\x57\xd4\x15\x73\xc5\x9d\x73\x25"
      "\x5c\x49\xd7\xd4\x35\x73\xcd\x5c\x73\xf7\x98\x6b\xe1\x5a\xba\x56\xee\x71"
      "\xf7\xb8\x7b\xc2\x3d\xe1\x9e\x4c\xb8\xd4\xb8\x6b\xef\x9e\x71\x1d\xdc\xb3"
      "\xae\xa3\x7b\xce\x3d\xe7\x9e\x77\x9d\xdd\x0b\xae\x8b\x7b\xd1\x75\x75\x2f"
      "\xb9\x6e\xae\xbb\x4b\x74\x89\xae\xa7\xeb\xe9\x7a\xb9\x5e\xae\x8f\xeb\xe3"
      "\xfa\xb9\x7e\xae\xbf\xeb\xef\x06\xb8\x01\x6e\xa0\x1b\xe8\x06\xbb\xc1\x6e"
      "\x88\x1b\xe2\x86\xba\xa1\x6e\x98\x1b\xe6\x46\xb8\x11\x6e\xa4\x1b\xe9\x46"
      "\xbb\xd1\x6e\xac\x1b\xeb\x92\x5c\x92\x1b\xef\xc6\xbb\x09\x6e\x82\x9b\xe8"
      "\x26\xba\xc9\x6e\xb2\x9b\xea\xa6\xba\xe9\x6e\xba\x9b\xe1\x66\xb8\x59\x6e"
      "\x96\x9b\xed\x66\xbb\xb9\x6e\xae\x9b\xef\xe6\xbb\x85\x6e\xa1\x5b\xe4\x16"
      "\xb9\x64\x97\xec\x16\xbb\xc5\x2e\xc5\xa5\xb8\xa5\x6e\xa9\x5b\xee\x96\xbb"
      "\x95\x6e\xa5\x5b\xed\x56\xbb\xb5\x6e\xad\x5b\xef\xd6\xbb\x8d\x6e\xa3\xdb"
      "\xec\x36\xbb\x2d\x6e\x8b\xdb\xe6\xb6\xb9\x1d\x6e\x87\xdb\xe5\x76\xb9\xdd"
      "\x6e\xb7\xdb\xe3\xf6\xb8\x54\x97\xea\xf6\xba\xbd\x6e\x9f\xdb\xe7\xf6\xbb"
      "\xaf\xdc\x01\xf7\xb5\x3b\xe8\xbe\x71\x87\xdc\xb7\xee\xb0\xfb\xce\x1d\x71"
      "\xdf\xbb\xa3\xee\x98\x3b\xee\xbc\x3e\xe1\x7e\x74\x27\xdd\x29\x77\xda\x9d"
      "\x71\x67\xdd\x4f\xee\x9c\x3b\xef\x2e\x38\xef\x92\x62\x6f\xc7\xc6\xc7\xde"
      "\x89\x4d\x88\xbd\x1b\x9b\x18\x9b\x14\x9b\x1c\x9b\x12\x9b\x1a\x9b\x16\x9b"
      "\x1e\x7b\x2f\x36\x23\x36\x33\x36\x2b\xf6\x7e\x6c\x76\x6c\x4e\x6c\x6e\x6c"
      "\x5e\x6c\x7e\x6c\x41\x6c\x61\xec\x83\xd8\xa2\xd8\x87\xb1\xe4\xd8\x47\xb1"
      "\xc5\xb1\x8f\x63\x29\xb1\x25\xb1\xa5\xb1\x65\xb1\xe5\xb1\x15\x31\xef\xf3"
      "\x6f\x89\x7c\x41\x5f\xc8\xc7\xfd\x75\xbe\xb0\xbf\xde\x17\xf1\x45\x7d\x31"
      "\x5f\xdc\x3b\x5f\xc2\x97\xf4\x37\xf8\x52\xfe\x46\x5f\xda\xdf\xe4\xcb\xf8"
      "\x9b\x7d\x59\x7f\x8b\x2f\xe7\xcb\xfb\x0a\xbe\xa1\x6f\xe4\x1b\xfb\x26\xbe"
      "\xa9\x6f\xe6\x1f\xf5\xcd\xfd\x63\xbe\x85\x6f\xe9\x5b\xf9\xc7\x7d\x6b\xff"
      "\x84\x6f\xe3\x9f\xf4\x6d\xfd\x53\xbe\x9d\x7f\xda\xb7\xf7\xcf\xf8\x0e\xfe"
      "\x59\xdf\xd1\x3f\xe7\x3b\xf9\xe7\xe7\x5c\x9a\xb2\xef\xea\x5f\xf2\xdd\x7c"
      "\x77\x9f\xe8\x7b\xf8\x9e\xfe\x65\xdf\xcb\xf7\xf6\x7d\x7c\x5f\xdf\x0f\x5f"
      "\xf1\xfd\xfd\xab\x7e\x80\x7f\xcd\x0f\xf4\x83\xfc\x60\xff\xba\x1f\xe2\xdf"
      "\xf0\x43\xfd\x9b\x7e\x98\x1f\xee\x47\xf8\xb7\xfc\x48\x3f\xca\x8f\xf6\x63"
      "\xfc\x58\x3f\xce\x27\xf9\xb7\xfd\x78\xff\x8e\x9f\xe0\xdf\xf5\x13\xfd\x24"
      "\x3f\xd9\x4f\xf1\x53\xfd\x34\x3f\xdd\xbf\xe7\x67\xf8\x99\x7e\x96\x7f\xdf"
      "\xcf\xf6\x73\xfc\x5c\x3f\xcf\xcf\xf7\x0b\xfc\x42\xff\x81\x5f\xe4\x3f\xf4"
      "\xc9\xfe\x23\xbf\xd8\x7f\xec\x53\xfc\x12\xbf\xd4\x2f\xf3\xcb\xfd\x0a\xbf"
      "\xd2\xaf\xf2\xab\xfd\x1a\xbf\xd6\xaf\xf3\xeb\xfd\x06\xbf\xd1\x6f\xf2\x9b"
      "\xfd\x27\x7e\x8b\xdf\xea\xb7\xf9\xed\x7e\x87\xdf\xe9\x77\xf9\x4f\xfd\x6e"
      "\xff\x99\xdf\xe3\x3f\xf7\xa9\xfe\x0b\xbf\xd7\xff\xcd\xef\xf3\x5f\xfa\xfd"
      "\xfe\x2b\x7f\xc0\x7f\xed\x0f\xfa\x6f\xfc\x21\xff\xad\x3f\xec\xbf\xf3\x47"
      "\xfc\xf7\xfe\xa8\x3f\xe6\x8f\xfb\x1f\xfc\x09\xff\xa3\x3f\xe9\x4f\xf9\xd3"
      "\xfe\x8c\x3f\xeb\x7f\xf2\xe7\xfc\x79\x7f\x41\x7e\x67\x4d\x08\x21\x84\x10"
      "\xe2\x5f\xa2\xff\x60\x7f\x8f\xdf\xf8\x3f\x75\x69\x4b\xd3\x13\x00\xb2\x6e"
      "\xcd\x7b\xe0\x1f\x6b\xae\xcf\xf5\xf3\xba\xb7\xda\xdd\x2e\x06\x00\x4f\x75"
      "\xef\x54\xf7\xd2\x96\x01\xea\x26\x26\x26\x5e\x3a\x36\x45\x43\x50\x68\x1e"
      "\x00\xc4\x2e\xe7\x67\x80\xcb\xf1\x12\x68\x05\x4f\x40\x5b\x68\x09\xa5\x7e"
      "\xb3\xbf\xde\xaa\xc2\xc5\xeb\xbe\xbf\xab\x5f\xb7\xee\x3f\xd4\x8f\xdf\x0c"
      "\x90\x19\x20\xd3\x2f\x39\x69\xb7\x47\xbf\xc4\x97\xeb\xdf\xf8\x3b\xf5\x1b"
      "\x7e\xc0\xbf\x5b\x7f\x09\xa4\x68\x84\xf8\x3c\x80\x22\x85\x2e\xe7\xa4\x15"
      "\xfe\x25\xbe\x5c\xbf\xf4\xef\xd4\xdf\xd9\xfa\xf7\xeb\x5f\xec\x3f\xd3\x97"
      "\x49\x00\x2d\xfe\x2e\x27\x0b\x5c\x8e\x2f\xd7\x2f\x09\x8f\xc1\xd3\xd0\xf6"
      "\x57\x47\x0a\x21\x84\x10\x42\x08\x21\x84\x10\x3f\xeb\xad\xce\x76\xfe\x83"
      "\xfb\xcf\x8b\xf7\xe7\xf9\xcc\xaf\xf3\x7e\x89\xff\xe8\xfe\xfc\x0f\x54\xfa"
      "\xaf\xf6\x2f\x84\x10\x42\x08\x21\x84\x10\x42\x88\x3f\xf6\xec\x0b\x5d\x9e"
      "\x7c\xb4\x6d\xdb\x96\x1d\xfe\x2f\x2f\x32\xfe\x67\xb4\xf1\x1f\xb0\x40\x00"
      "\xf8\xf3\x59\x59\x2f\x7d\xb3\xfc\xa7\x9c\x85\x2c\xfe\x07\x16\x57\xf8\x07"
      "\x93\x10\x42\x08\x21\x84\x10\xe2\x2f\x77\xf9\xa2\xff\x4a\x77\x22\x84\x10"
      "\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21"
      "\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42"
      "\xa4\x5f\xff\xfe\x5f\x08\x53\xff\xf2\xc1\x57\xfa\x1c\x85\x10\x42\x08\x21"
      "\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42"
      "\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84"
      "\x10\x42\x08\x21\x84\x10\x42\x88\x2b\xed\xff\x05\x00\x00\xff\xff\x11\x3a"
      "\x4f\xfd",
      5402));
  NONFAILING(syz_mount_image(
      /*fs=*/0x200000000240, /*dir=*/0x2000000005c0,
      /*flags=MS_LAZYTIME|MS_SYNCHRONOUS|MS_STRICTATIME|MS_NODIRATIME|MS_NOATIME|0xc0*/
      0x3000cd0, /*opts=*/0x200000000440, /*chdir=*/1, /*size=*/0x151a,
      /*img=*/0x200000003f40));
  //  chown arguments: [
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8)
  //    }
  //    uid: uid (resource)
  //    gid: gid (resource)
  //  ]
  NONFAILING(memcpy((void*)0x200000000140, "./file0\000", 8));
  syscall(__NR_chown, /*file=*/0x200000000140ul, /*uid=*/0, /*gid=*/0);
  close_fds();
}
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);
  setup_sysctl();
  const char* reason;
  (void)reason;
  if ((reason = setup_binfmt_misc()))
    printf("the reproducer may not work as expected: binfmt_misc setup failed: "
           "%s\n",
           reason);
  if ((reason = setup_usb()))
    printf("the reproducer may not work as expected: USB injection setup "
           "failed: %s\n",
           reason);
  if ((reason = setup_swap()))
    printf("the reproducer may not work as expected: swap setup failed: %s\n",
           reason);
  install_segv_handler();
  use_temporary_dir();
  do_sandbox_none();
  return 0;
}