// https://syzkaller.appspot.com/bug?id=b7f47b0e7250ea0af4ffab28d62cf36f6a70f502
// 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 <pthread.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.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/futex.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>

#ifndef __NR_close_range
#define __NR_close_range 436
#endif
#ifndef __NR_io_uring_setup
#define __NR_io_uring_setup 425
#endif

static unsigned long long procid;

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 void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

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 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_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 struct nlmsg nlmsg;

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");
}

#define NL802154_CMD_SET_SHORT_ADDR 11
#define NL802154_ATTR_IFINDEX 3
#define NL802154_ATTR_SHORT_ADDR 10

static const char* setup_802154()
{
  const char* error = NULL;
  int sock_generic = -1;
  int sock_route = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
  if (sock_route == -1) {
    error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) failed";
    goto fail;
  }
  sock_generic = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (sock_generic == -1) {
    error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) failed";
    goto fail;
  }
  {
    int nl802154_family_id =
        netlink_query_family_id(&nlmsg, sock_generic, "nl802154", true);
    if (nl802154_family_id < 0) {
      error = "netlink_query_family_id failed";
      goto fail;
    }
    for (int i = 0; i < 2; i++) {
      char devname[] = "wpan0";
      devname[strlen(devname) - 1] += i;
      uint64_t hwaddr = 0xaaaaaaaaaaaa0002 + (i << 8);
      uint16_t shortaddr = 0xaaa0 + i;
      int ifindex = if_nametoindex(devname);
      struct genlmsghdr genlhdr;
      memset(&genlhdr, 0, sizeof(genlhdr));
      genlhdr.cmd = NL802154_CMD_SET_SHORT_ADDR;
      netlink_init(&nlmsg, nl802154_family_id, 0, &genlhdr, sizeof(genlhdr));
      netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
      netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr,
                   sizeof(shortaddr));
      if (netlink_send(&nlmsg, sock_generic) < 0) {
        error = "NL802154_CMD_SET_SHORT_ADDR failed";
        goto fail;
      }
      netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr,
                            sizeof(hwaddr), 0);
      if (i == 0) {
        netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0", false);
        netlink_done(&nlmsg);
        netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
        if (netlink_send(&nlmsg, sock_route) < 0) {
          error = "netlink: adding device lowpan0 type lowpan link wpan0";
          goto fail;
        }
      }
    }
  }
fail:
  close(sock_route);
  close(sock_generic);
  return error;
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void execute_one(void)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 19; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      event_timedwait(&th->done, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

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;
    }
  }
}

void execute_call(int call)
{
  switch (call) {
  case 0:
    //  mmap$auto arguments: [
    //    addr: intptr = 0x0 (8 bytes)
    //    len: intptr = 0x20009 (8 bytes)
    //    prot: intptr = 0xdf (8 bytes)
    //    flags: intptr = 0xeb1 (8 bytes)
    //    fd: fd (resource)
    //    off: intptr = 0x8000 (8 bytes)
    //  ]
    syscall(__NR_mmap, /*addr=*/0ul, /*len=*/0x20009ul, /*prot=*/0xdful,
            /*flags=*/0xeb1ul, /*fd=*/0xa5, /*off=*/0x8000ul);
    break;
  case 1:
    //  close_range$auto arguments: [
    //    fd: fd (resource)
    //    max_fd: fd (resource)
    //    flags: int32 = 0x0 (4 bytes)
    //  ]
    syscall(__NR_close_range, /*fd=*/0, /*max_fd=*/5, /*flags=*/0);
    break;
  case 2:
    //  openat$auto_kernfs_file_fops_kernfs_internal arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2f 73 79 73 2f 64 65 76 69 63 65 73 2f 76 69 72 74 75 61 6c
    //      2f 6e 65 74 2f 73 69 74 30 2f 73 74 61 74 69 73 74 69 63 73 2f 74 78
    //      5f 63 6f 6d 70 72 65 73 73 65 64 00} (length 0x37)
    //    }
    //    flags: open_flags = 0xe00 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_kernfs_file_fops_kernfs_internal
    memcpy((void*)0x200000000040,
           "/sys/devices/virtual/net/sit0/statistics/tx_compressed\000", 55);
    syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000040ul,
            /*flags=O_TRUNC|O_NONBLOCK|O_APPEND*/ 0xe00, /*mode=*/0);
    break;
  case 3:
    //  openat$auto_nsim_dev_trap_fa_cookie_fops_dev arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: nil
    //    flags: open_flags = 0x2202 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_nsim_dev_trap_fa_cookie_fops_dev
    syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0ul,
            /*flags=O_TRUNC|FASYNC|O_RDWR*/ 0x2202, /*mode=*/0);
    break;
  case 4:
    //  openat$auto_vmwgfx_driver_fops_vmwgfx_drv arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: nil
    //    flags: open_flags = 0x80 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_vmwgfx_driver_fops_vmwgfx_drv
    syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0ul,
            /*flags=O_EXCL*/ 0x80, /*mode=*/0);
    break;
  case 5:
    //  openat$auto_cgwb_debug_stats_fops_ arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2f 73 79 73 2f 6b 65 72 6e 65 6c 2f 64 65 62 75 67 2f 62 64
    //      69 2f 31 3a 37 2f 77 62 5f 73 74 61 74 73 00} (length 0x23)
    //    }
    //    flags: open_flags = 0x2080 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_cgwb_debug_stats_fops_
    memcpy((void*)0x200000000000, "/sys/kernel/debug/bdi/1:7/wb_stats\000", 35);
    syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000000ul,
            /*flags=O_EXCL|FASYNC*/ 0x2080, /*mode=*/0);
    break;
  case 6:
    //  close_range$auto arguments: [
    //    fd: fd (resource)
    //    max_fd: fd (resource)
    //    flags: int32 = 0x0 (4 bytes)
    //  ]
    syscall(__NR_close_range, /*fd=*/2, /*max_fd=*/8, /*flags=*/0);
    break;
  case 7:
    //  ioctl$auto_KVM_CREATE_VM arguments: [
    //    fd: fd_kvm_chardev_ops_kvm_main (resource)
    //    cmd: const = 0xae01 (4 bytes)
    //    arg: const = 0x0 (8 bytes)
    //  ]
    //  returns fd
    syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0xae01, /*arg=*/0ul);
    break;
  case 8:
    //  mmap$auto arguments: [
    //    addr: intptr = 0x0 (8 bytes)
    //    len: intptr = 0x810004 (8 bytes)
    //    prot: intptr = 0xffb (8 bytes)
    //    flags: intptr = 0x8000000008011 (8 bytes)
    //    fd: fd (resource)
    //    off: intptr = 0x8000 (8 bytes)
    //  ]
    syscall(__NR_mmap, /*addr=*/0ul, /*len=*/0x810004ul, /*prot=*/0xffbul,
            /*flags=*/0x8000000008011ul, /*fd=*/3, /*off=*/0x8000ul);
    break;
  case 9:
    //  close_range$auto arguments: [
    //    fd: fd (resource)
    //    max_fd: fd (resource)
    //    flags: int32 = 0x0 (4 bytes)
    //  ]
    syscall(__NR_close_range, /*fd=*/2, /*max_fd=*/8, /*flags=*/0);
    break;
  case 10:
    //  io_uring_setup$auto arguments: [
    //    entries: int32 = 0x6 (4 bytes)
    //    params: nil
    //  ]
    //  returns fd
    syscall(__NR_io_uring_setup, /*entries=*/6, /*params=*/0ul);
    break;
  case 11:
    //  mmap$auto arguments: [
    //    addr: intptr = 0x0 (8 bytes)
    //    len: intptr = 0x2020009 (8 bytes)
    //    prot: intptr = 0x3 (8 bytes)
    //    flags: intptr = 0xeb1 (8 bytes)
    //    fd: fd (resource)
    //    off: intptr = 0x8000 (8 bytes)
    //  ]
    syscall(__NR_mmap, /*addr=*/0ul, /*len=*/0x2020009ul, /*prot=*/3ul,
            /*flags=*/0xeb1ul, /*fd=*/(intptr_t)-1, /*off=*/0x8000ul);
    break;
  case 12:
    //  socketpair$auto arguments: [
    //    family: int32 = 0x1e (4 bytes)
    //    type: int32 = 0x1 (4 bytes)
    //    protocol: int32 = 0x8000000000000000 (4 bytes)
    //    usockvec: nil
    //  ]
    //  returns fd
    syscall(__NR_socketpair, /*family=*/0x1e, /*type=*/1, /*protocol=*/0,
            /*usockvec=*/0ul);
    break;
  case 13:
    //  socket arguments: [
    //    domain: socket_domain = 0x11 (8 bytes)
    //    type: socket_type = 0xa (8 bytes)
    //    proto: int32 = 0x300 (4 bytes)
    //  ]
    //  returns sock
    syscall(__NR_socket, /*domain=AF_PACKET*/ 0x11ul,
            /*type=SOCK_PACKET*/ 0xaul, /*proto=*/0x300);
    break;
  case 14:
    //  sendmmsg$auto arguments: [
    //    fd: fd (resource)
    //    mmsg: nil
    //    vlen: int32 = 0x9a6 (4 bytes)
    //    flags: int32 = 0xa (4 bytes)
    //  ]
    syscall(__NR_sendmmsg, /*fd=*/4, /*mmsg=*/0ul, /*vlen=*/0x9a6,
            /*flags=*/0xa);
    break;
  case 15:
    //  setsockopt$auto arguments: [
    //    fd: fd (resource)
    //    level: int32 = 0x1 (4 bytes)
    //    optname: int32 = 0x21 (4 bytes)
    //    optval: nil
    //    optlen: int32 = 0x9 (4 bytes)
    //  ]
    syscall(__NR_setsockopt, /*fd=*/3, /*level=*/1, /*optname=*/0x21,
            /*optval=*/0ul, /*optlen=*/9);
    break;
  case 16:
    //  syz_genetlink_get_family_id$auto_ipvs arguments: [
    //    name: nil
    //    fd: sock_nl_generic (resource)
    //  ]
    //  returns genl_ipvs_family_id$auto
    syz_genetlink_get_family_id(/*name=*/0, /*fd=*/-1);
    break;
  case 17:
    //  socket arguments: [
    //    domain: socket_domain = 0x11 (8 bytes)
    //    type: socket_type = 0x3 (8 bytes)
    //    proto: int32 = 0x9 (4 bytes)
    //  ]
    //  returns sock
    syscall(__NR_socket, /*domain=AF_PACKET*/ 0x11ul, /*type=SOCK_RAW*/ 3ul,
            /*proto=*/9);
    break;
  case 18:
    //  capset$auto arguments: [
    //    header: nil
    //    data: nil
    //  ]
    syscall(__NR_capset, /*header=*/0ul, /*data=*/0ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*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=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  if ((reason = setup_802154())) {
    fprintf(stderr, "reproducer setup failed: 802154 injection: %s\n", reason);
    exit(1);
  }
  for (procid = 0; procid < 4; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}