// https://syzkaller.appspot.com/bug?id=a0810b4aaeaaa419b06709a034db6a83c830fc95
// 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/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>

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

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

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

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

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

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 < 13; 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;
    }
  }
}

uint64_t r[7] = {0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0xffffffffffffffff,
                 0x0,
                 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  openat$tun arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd)
    //    }
    //    flags: open_flags = 0x0 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_tun
    memcpy((void*)0x200000000100, "/dev/net/tun\000", 13);
    res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                  /*file=*/0x200000000100ul, /*flags=*/0, /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  ioctl$TUNSETIFF arguments: [
    //    fd: fd_tun (resource)
    //    cmd: const = 0x400454ca (4 bytes)
    //    arg: ptr[in, ifreq_dev_t[devnames, flags[tun_setiff_flags, int16]]] {
    //      ifreq_dev_t[devnames, flags[tun_setiff_flags, int16]] {
    //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00
    //        00} (length 0x10) elem: tun_setiff_flags = 0x2 (2 bytes) pad = 0x0
    //        (22 bytes)
    //      }
    //    }
    //  ]
    memcpy((void*)0x200000000040, "syzkaller0\000\000\000\000\000\000", 16);
    *(uint16_t*)0x200000000050 = 2;
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x400454ca,
            /*arg=*/0x200000000040ul);
    break;
  case 2:
    //  openat$tun arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd)
    //    }
    //    flags: open_flags = 0x102 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_tun
    memcpy((void*)0x2000000001c0, "/dev/net/tun\000", 13);
    res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                  /*file=*/0x2000000001c0ul, /*flags=O_NOCTTY|O_RDWR*/ 0x102,
                  /*mode=*/0);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    //  close arguments: [
    //    fd: fd (resource)
    //  ]
    syscall(__NR_close, /*fd=*/r[1]);
    break;
  case 4:
    //  socket$unix arguments: [
    //    domain: const = 0x1 (8 bytes)
    //    type: unix_socket_type = 0x1 (8 bytes)
    //    proto: const = 0x0 (4 bytes)
    //  ]
    //  returns sock_unix
    res = syscall(__NR_socket, /*domain=*/1ul, /*type=SOCK_STREAM*/ 1ul,
                  /*proto=*/0);
    if (res != -1)
      r[2] = res;
    break;
  case 5:
    //  socket$nl_route arguments: [
    //    domain: const = 0x10 (8 bytes)
    //    type: const = 0x3 (8 bytes)
    //    proto: const = 0x0 (4 bytes)
    //  ]
    //  returns sock_nl_route
    res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
    if (res != -1)
      r[3] = res;
    break;
  case 6:
    //  ioctl$sock_SIOCGIFINDEX arguments: [
    //    fd: sock (resource)
    //    cmd: const = 0x8933 (4 bytes)
    //    arg: ptr[out, ifreq_dev_t[devnames, ifindex]] {
    //      ifreq_dev_t[devnames, ifindex] {
    //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00
    //        00} (length 0x10) elem: ifindex (resource) pad = 0x0 (20 bytes)
    //      }
    //    }
    //  ]
    memcpy((void*)0x200000000100, "syzkaller0\000\000\000\000\000\000", 16);
    res = syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x8933,
                  /*arg=*/0x200000000100ul);
    if (res != -1)
      r[4] = *(uint32_t*)0x200000000110;
    break;
  case 7:
    //  sendmsg$nl_route_sched arguments: [
    //    fd: sock_nl_route (resource)
    //    msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] {
    //      msghdr_netlink[netlink_msg_route_sched] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: ptr[in, iovec[in, netlink_msg_route_sched]] {
    //          iovec[in, netlink_msg_route_sched] {
    //            addr: ptr[in, netlink_msg_route_sched] {
    //              union netlink_msg_route_sched {
    //                newqdisc: netlink_msg_t[const[RTM_NEWQDISC, int16],
    //                tcmsg[AF_UNSPEC], rtm_tca_policy] {
    //                  len: len = 0x48 (4 bytes)
    //                  type: const = 0x24 (2 bytes)
    //                  flags: netlink_msg_flags = 0x4ee4e6a52ff56541 (2 bytes)
    //                  seq: int32 = 0x70bd2d (4 bytes)
    //                  pid: int32 = 0x0 (4 bytes)
    //                  payload: tcmsg[AF_UNSPEC] {
    //                    family: const = 0x0 (1 bytes)
    //                    tcm__pad1: const = 0x0 (1 bytes)
    //                    tcm__pad2: const = 0x0 (2 bytes)
    //                    ifindex: ifindex (resource)
    //                    tcm_handle: tcm_handle {
    //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
    //                      major: tcm_handle_offsets = 0xb (2 bytes)
    //                    }
    //                    tcm_parent: tcm_handle {
    //                      minor: tcm_handle_offsets = 0xffff (2 bytes)
    //                      major: tcm_handle_offsets = 0xffff (2 bytes)
    //                    }
    //                    tcm_info: tcm_handle {
    //                      minor: tcm_handle_offsets = 0xfff2 (2 bytes)
    //                      major: tcm_handle_offsets = 0x2 (2 bytes)
    //                    }
    //                  }
    //                  attrs: array[rtm_tca_policy] {
    //                    union rtm_tca_policy {
    //                      qdisc_kind_options: union qdisc_kind_options {
    //                        q_cbs: tca_kind_options_t["cbs", cbs_policy] {
    //                          TCA_KIND: nlattr_t[const[TCA_KIND, int16],
    //                          string["cbs"]] {
    //                            nla_len: offsetof = 0x8 (2 bytes)
    //                            nla_type: const = 0x1 (2 bytes)
    //                            payload: buffer: {63 62 73 00} (length 0x4)
    //                            size: buffer: {} (length 0x0)
    //                          }
    //                          TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16],
    //                          cbs_policy] {
    //                            nla_len: offsetof = 0x1c (2 bytes)
    //                            nla_type: const = 0x2 (2 bytes)
    //                            payload: union cbs_policy {
    //                              TCA_CBS_PARMS: nlattr_t[const[TCA_CBS_PARMS,
    //                              int16], tc_cbs_qopt] {
    //                                nla_len: offsetof = 0x18 (2 bytes)
    //                                nla_type: const = 0x1 (2 bytes)
    //                                payload: tc_cbs_qopt {
    //                                  offload: int8 = 0x0 (1 bytes)
    //                                  _pad: buffer: {00 00 00} (length 0x3)
    //                                  hicredit: int32 = 0x1 (4 bytes)
    //                                  locredit: int32 = 0x7 (4 bytes)
    //                                  idleslope: int32 = 0x100 (4 bytes)
    //                                  sendslope: int32 = 0x8 (4 bytes)
    //                                }
    //                                size: buffer: {} (length 0x0)
    //                              }
    //                            }
    //                            size: buffer: {} (length 0x0)
    //                          }
    //                        }
    //                      }
    //                    }
    //                  }
    //                }
    //              }
    //            }
    //            len: len = 0x48 (8 bytes)
    //          }
    //        }
    //        vlen: const = 0x1 (8 bytes)
    //        ctrl: const = 0x0 (8 bytes)
    //        ctrllen: const = 0x0 (8 bytes)
    //        f: send_flags = 0x20000001 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x0 (8 bytes)
    //  ]
    *(uint64_t*)0x200000000000 = 0;
    *(uint32_t*)0x200000000008 = 0;
    *(uint64_t*)0x200000000010 = 0x200000000180;
    *(uint64_t*)0x200000000180 = 0x2000000026c0;
    *(uint32_t*)0x2000000026c0 = 0x48;
    *(uint16_t*)0x2000000026c4 = 0x24;
    *(uint16_t*)0x2000000026c6 = 0x6541;
    *(uint32_t*)0x2000000026c8 = 0x70bd2d;
    *(uint32_t*)0x2000000026cc = 0;
    *(uint8_t*)0x2000000026d0 = 0;
    *(uint8_t*)0x2000000026d1 = 0;
    *(uint16_t*)0x2000000026d2 = 0;
    *(uint32_t*)0x2000000026d4 = r[4];
    *(uint16_t*)0x2000000026d8 = 0;
    *(uint16_t*)0x2000000026da = 0xb;
    *(uint16_t*)0x2000000026dc = -1;
    *(uint16_t*)0x2000000026de = -1;
    *(uint16_t*)0x2000000026e0 = 0xfff2;
    *(uint16_t*)0x2000000026e2 = 2;
    *(uint16_t*)0x2000000026e4 = 8;
    *(uint16_t*)0x2000000026e6 = 1;
    memcpy((void*)0x2000000026e8, "cbs\000", 4);
    *(uint16_t*)0x2000000026ec = 0x1c;
    *(uint16_t*)0x2000000026ee = 2;
    *(uint16_t*)0x2000000026f0 = 0x18;
    *(uint16_t*)0x2000000026f2 = 1;
    *(uint8_t*)0x2000000026f4 = 0;
    memset((void*)0x2000000026f5, 0, 3);
    *(uint32_t*)0x2000000026f8 = 1;
    *(uint32_t*)0x2000000026fc = 7;
    *(uint32_t*)0x200000002700 = 0x100;
    *(uint32_t*)0x200000002704 = 8;
    *(uint64_t*)0x200000000188 = 0x48;
    *(uint64_t*)0x200000000018 = 1;
    *(uint64_t*)0x200000000020 = 0;
    *(uint64_t*)0x200000000028 = 0;
    *(uint32_t*)0x200000000030 = 0x20000001;
    syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x200000000000ul, /*f=*/0ul);
    break;
  case 8:
    //  sendmsg$nl_route_sched arguments: [
    //    fd: sock_nl_route (resource)
    //    msg: ptr[in, msghdr_netlink[netlink_msg_route_sched]] {
    //      msghdr_netlink[netlink_msg_route_sched] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: ptr[in, iovec[in, netlink_msg_route_sched]] {
    //          iovec[in, netlink_msg_route_sched] {
    //            addr: ptr[in, netlink_msg_route_sched] {
    //              union netlink_msg_route_sched {
    //                newqdisc: netlink_msg_t[const[RTM_NEWQDISC, int16],
    //                tcmsg[AF_UNSPEC], rtm_tca_policy] {
    //                  len: len = 0x3c (4 bytes)
    //                  type: const = 0x24 (2 bytes)
    //                  flags: netlink_msg_flags = 0x4ee4e6a52ff56541 (2 bytes)
    //                  seq: int32 = 0x70b923 (4 bytes)
    //                  pid: int32 = 0x80000 (4 bytes)
    //                  payload: tcmsg[AF_UNSPEC] {
    //                    family: const = 0x0 (1 bytes)
    //                    tcm__pad1: const = 0x0 (1 bytes)
    //                    tcm__pad2: const = 0x0 (2 bytes)
    //                    ifindex: ifindex (resource)
    //                    tcm_handle: tcm_handle {
    //                      minor: tcm_handle_offsets = 0x0 (2 bytes)
    //                      major: tcm_handle_offsets = 0x0 (2 bytes)
    //                    }
    //                    tcm_parent: tcm_handle {
    //                      minor: tcm_handle_offsets = 0xffe0 (2 bytes)
    //                      major: tcm_handle_offsets = 0xb (2 bytes)
    //                    }
    //                    tcm_info: tcm_handle {
    //                      minor: tcm_handle_offsets = 0x9 (2 bytes)
    //                      major: tcm_handle_offsets = 0xb (2 bytes)
    //                    }
    //                  }
    //                  attrs: array[rtm_tca_policy] {
    //                    union rtm_tca_policy {
    //                      qdisc_kind_options: union qdisc_kind_options {
    //                        q_cake: tca_kind_options_t["cake",
    //                        array[cake_policy]] {
    //                          TCA_KIND: nlattr_t[const[TCA_KIND, int16],
    //                          string["cake"]] {
    //                            nla_len: offsetof = 0x9 (2 bytes)
    //                            nla_type: const = 0x1 (2 bytes)
    //                            payload: buffer: {63 61 6b 65 00} (length 0x5)
    //                            size: buffer: {} (length 0x0)
    //                            pad = 0x0 (3 bytes)
    //                          }
    //                          TCA_OPTIONS: nlattr_t[const[TCA_OPTIONS, int16],
    //                          array[cake_policy]] {
    //                            nla_len: offsetof = 0xc (2 bytes)
    //                            nla_type: const = 0x2 (2 bytes)
    //                            payload: array[cake_policy] {
    //                              union cake_policy {
    //                                TCA_CAKE_MEMORY:
    //                                nlattr_t[const[TCA_CAKE_MEMORY, int16],
    //                                int32] {
    //                                  nla_len: offsetof = 0x8 (2 bytes)
    //                                  nla_type: const = 0xa (2 bytes)
    //                                  payload: int32 = 0x7 (4 bytes)
    //                                  size: buffer: {} (length 0x0)
    //                                }
    //                              }
    //                            }
    //                            size: buffer: {} (length 0x0)
    //                          }
    //                        }
    //                      }
    //                    }
    //                  }
    //                }
    //              }
    //            }
    //            len: len = 0x3c (8 bytes)
    //          }
    //        }
    //        vlen: const = 0x1 (8 bytes)
    //        ctrl: const = 0x0 (8 bytes)
    //        ctrllen: const = 0x0 (8 bytes)
    //        f: send_flags = 0x2000c061 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x4008000 (8 bytes)
    //  ]
    *(uint64_t*)0x200000000200 = 0;
    *(uint32_t*)0x200000000208 = 0;
    *(uint64_t*)0x200000000210 = 0x200000000140;
    *(uint64_t*)0x200000000140 = 0x200000000440;
    *(uint32_t*)0x200000000440 = 0x3c;
    *(uint16_t*)0x200000000444 = 0x24;
    *(uint16_t*)0x200000000446 = 0x6541;
    *(uint32_t*)0x200000000448 = 0x70b923;
    *(uint32_t*)0x20000000044c = 0x80000;
    *(uint8_t*)0x200000000450 = 0;
    *(uint8_t*)0x200000000451 = 0;
    *(uint16_t*)0x200000000452 = 0;
    *(uint32_t*)0x200000000454 = r[4];
    *(uint16_t*)0x200000000458 = 0;
    *(uint16_t*)0x20000000045a = 0;
    *(uint16_t*)0x20000000045c = 0xffe0;
    *(uint16_t*)0x20000000045e = 0xb;
    *(uint16_t*)0x200000000460 = 9;
    *(uint16_t*)0x200000000462 = 0xb;
    *(uint16_t*)0x200000000464 = 9;
    *(uint16_t*)0x200000000466 = 1;
    memcpy((void*)0x200000000468, "cake\000", 5);
    *(uint16_t*)0x200000000470 = 0xc;
    *(uint16_t*)0x200000000472 = 2;
    *(uint16_t*)0x200000000474 = 8;
    *(uint16_t*)0x200000000476 = 0xa;
    *(uint32_t*)0x200000000478 = 7;
    *(uint64_t*)0x200000000148 = 0x3c;
    *(uint64_t*)0x200000000218 = 1;
    *(uint64_t*)0x200000000220 = 0;
    *(uint64_t*)0x200000000228 = 0;
    *(uint32_t*)0x200000000230 = 0x2000c061;
    syscall(__NR_sendmsg, /*fd=*/r[3], /*msg=*/0x200000000200ul,
            /*f=MSG_ZEROCOPY|MSG_MORE*/ 0x4008000ul);
    break;
  case 9:
    //  ioctl$SIOCSIFHWADDR arguments: [
    //    fd: fd_tun (resource)
    //    cmd: const = 0x8914 (4 bytes)
    //    arg: ptr[in, ifreq_dev_t[devnames, mac_addr]] {
    //      ifreq_dev_t[devnames, mac_addr] {
    //        ifr_ifrn: buffer: {73 79 7a 6b 61 6c 6c 65 72 30 00 00 00 00 00
    //        00} (length 0x10) elem: union mac_addr {
    //          multicast: buffer: {bb bb bb bb bb bb} (length 0x6)
    //        }
    //        pad = 0x0 (18 bytes)
    //      }
    //    }
    //  ]
    memcpy((void*)0x200000002280, "syzkaller0\000\000\000\000\000\000", 16);
    memset((void*)0x200000002290, 187, 6);
    syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8914, /*arg=*/0x200000002280ul);
    break;
  case 10:
    //  socket$nl_generic arguments: [
    //    domain: const = 0x10 (8 bytes)
    //    type: const = 0x3 (8 bytes)
    //    proto: const = 0x10 (4 bytes)
    //  ]
    //  returns sock_nl_generic
    res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0x10);
    if (res != -1)
      r[5] = res;
    break;
  case 11:
    //  syz_genetlink_get_family_id$tipc arguments: [
    //    name: ptr[in, buffer] {
    //      buffer: {54 49 50 43 00} (length 0x5)
    //    }
    //    fd: sock_nl_generic (resource)
    //  ]
    //  returns genl_tipc_family_id
    memcpy((void*)0x200000000080, "TIPC\000", 5);
    res = -1;
    res = syz_genetlink_get_family_id(/*name=*/0x200000000080, /*fd=*/r[5]);
    if (res != -1)
      r[6] = res;
    break;
  case 12:
    //  sendmsg$TIPC_CMD_ENABLE_BEARER arguments: [
    //    fd: sock_nl_generic (resource)
    //    msg: ptr[in, msghdr_netlink[netlink_msg_t[genl_tipc_family_id,
    //    tipc_genlmsghdr_t[TIPC_CMD_ENABLE_BEARER,
    //    tipc_tlv_desc[TIPC_TLV_BEARER_CONFIG, tipc_bearer_config]], void]]] {
    //      msghdr_netlink[netlink_msg_t[genl_tipc_family_id,
    //      tipc_genlmsghdr_t[TIPC_CMD_ENABLE_BEARER,
    //      tipc_tlv_desc[TIPC_TLV_BEARER_CONFIG, tipc_bearer_config]], void]] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: ptr[in, iovec[in, netlink_msg_t[genl_tipc_family_id,
    //        tipc_genlmsghdr_t[TIPC_CMD_ENABLE_BEARER,
    //        tipc_tlv_desc[TIPC_TLV_BEARER_CONFIG, tipc_bearer_config]],
    //        void]]] {
    //          iovec[in, netlink_msg_t[genl_tipc_family_id,
    //          tipc_genlmsghdr_t[TIPC_CMD_ENABLE_BEARER,
    //          tipc_tlv_desc[TIPC_TLV_BEARER_CONFIG, tipc_bearer_config]],
    //          void]] {
    //            addr: ptr[inout, array[ANYUNION]] {
    //              array[ANYUNION] {
    //                union ANYUNION {
    //                  ANYBLOB: buffer: {38 00 00 00} (length 0x4)
    //                }
    //                union ANYUNION {
    //                  ANYRES16: ANYRES16 (resource)
    //                }
    //                union ANYUNION {
    //                  ANYBLOB: buffer: {01 00 00 00 0d 00 00 00 00 00 01 00 00
    //                  00 00 00 00 00 01 41 00 00 00 1c 00 17 00 00 00 00 00 00
    //                  00 00 65 74 68 3a 73 79 7a 6b 61 6c 6c 65 72 30} (length
    //                  0x30)
    //                }
    //              }
    //            }
    //            len: len = 0x38 (8 bytes)
    //          }
    //        }
    //        vlen: const = 0x1 (8 bytes)
    //        ctrl: const = 0x0 (8 bytes)
    //        ctrllen: const = 0x0 (8 bytes)
    //        f: send_flags = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //      }
    //    }
    //    f: send_flags = 0x0 (8 bytes)
    //  ]
    *(uint64_t*)0x2000000002c0 = 0;
    *(uint32_t*)0x2000000002c8 = 0;
    *(uint64_t*)0x2000000002d0 = 0x200000000280;
    *(uint64_t*)0x200000000280 = 0x200000000680;
    memcpy((void*)0x200000000680, "8\000\000\000", 4);
    *(uint16_t*)0x200000000684 = r[6];
    memcpy((void*)0x200000000686,
           "\x01\x00\x00\x00\x0d\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00"
           "\x00\x00\x01\x41\x00\x00\x00\x1c\x00\x17\x00\x00\x00\x00\x00\x00"
           "\x00\x00\x65\x74\x68\x3a\x73\x79\x7a\x6b\x61\x6c\x6c\x65\x72\x30",
           48);
    *(uint64_t*)0x200000000288 = 0x38;
    *(uint64_t*)0x2000000002d8 = 1;
    *(uint64_t*)0x2000000002e0 = 0;
    *(uint64_t*)0x2000000002e8 = 0;
    *(uint32_t*)0x2000000002f0 = 0;
    syscall(__NR_sendmsg, /*fd=*/r[5], /*msg=*/0x2000000002c0ul, /*f=*/0ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}