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

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.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/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/futex.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;
}

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 < 8; 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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  openat$tun arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    file: ptr[in, buffer] {
    //      buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd)
    //    }
    //    flags: open_flags = 0x40241 (4 bytes)
    //    mode: const = 0x0 (2 bytes)
    //  ]
    //  returns fd_tun
    memcpy((void*)0x200000000000, "/dev/net/tun\000", 13);
    res = syscall(
        __NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000000ul,
        /*flags=O_TRUNC|O_NOATIME|O_CREAT|O_WRONLY*/ 0x40241, /*mode=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  ioctl$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 31 00 00 00 00 00
    //        00} (length 0x10) elem: tun_setiff_flags = 0xc201 (2 bytes) pad =
    //        0x0 (22 bytes)
    //      }
    //    }
    //  ]
    memcpy((void*)0x200000000200, "syzkaller1\000\000\000\000\000\000", 16);
    *(uint16_t*)0x200000000210 = 0xc201;
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x400454ca,
            /*arg=*/0x200000000200ul);
    break;
  case 2:
    //  socket$kcm arguments: [
    //    domain: const = 0x2 (8 bytes)
    //    type: kcm_socket_type = 0xa (8 bytes)
    //    proto: const = 0x2 (4 bytes)
    //  ]
    //  returns sock_kcm
    res = syscall(__NR_socket, /*domain=*/2ul, /*type=SOCK_DGRAM|0x8*/ 0xaul,
                  /*proto=*/2);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    //  ioctl$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 31 00 00 00 00 00
    //        00} (length 0x10) elem: union mac_addr {
    //          link_local: mac_addr_link_local {
    //            a0: const = 0x1 (1 bytes)
    //            a1: const = 0x80 (1 bytes)
    //            a2: const = 0xc2 (1 bytes)
    //            a3: const = 0x0 (1 bytes)
    //            a4: const = 0x0 (1 bytes)
    //            a5: mac_addr_link_local_values = 0xe (1 bytes)
    //          }
    //        }
    //        pad = 0x0 (18 bytes)
    //      }
    //    }
    //  ]
    memcpy((void*)0x200000000180, "syzkaller1\000\000\000\000\000\000", 16);
    *(uint8_t*)0x200000000190 = 1;
    *(uint8_t*)0x200000000191 = 0x80;
    *(uint8_t*)0x200000000192 = 0xc2;
    *(uint8_t*)0x200000000193 = 0;
    *(uint8_t*)0x200000000194 = 0;
    *(uint8_t*)0x200000000195 = 0xe;
    syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8914, /*arg=*/0x200000000180ul);
    break;
  case 4:
    //  socket$nl_netfilter arguments: [
    //    domain: const = 0x10 (8 bytes)
    //    type: const = 0x3 (8 bytes)
    //    proto: const = 0xc (4 bytes)
    //  ]
    //  returns sock_nl_netfilter
    res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0xc);
    if (res != -1)
      r[2] = res;
    break;
  case 5:
    //  bind$xdp arguments: [
    //    fd: sock_xdp (resource)
    //    addr: ptr[in, sockaddr_xdp_bind] {
    //      sockaddr_xdp_bind {
    //        sxdp_family: const = 0x2c (2 bytes)
    //        sxdp_flags: sxdp_flags = 0x2 (2 bytes)
    //        sxdp_ifindex: ifindex (resource)
    //        sxdp_queue_id: int32 = 0x0 (4 bytes)
    //        sxdp_shared_umem_fd: sock_xdp (resource)
    //      }
    //    }
    //    len: bytesize = 0x10 (8 bytes)
    //  ]
    *(uint16_t*)0x200000000100 = 0x2c;
    *(uint16_t*)0x200000000102 = 2;
    *(uint32_t*)0x200000000104 = 0;
    *(uint32_t*)0x200000000108 = 0;
    *(uint32_t*)0x20000000010c = -1;
    syscall(__NR_bind, /*fd=*/(intptr_t)-1, /*addr=*/0x200000000100ul,
            /*len=*/0x10ul);
    break;
  case 6:
    //  sendmsg$NFT_BATCH arguments: [
    //    fd: sock_nl_netfilter (resource)
    //    msg: ptr[in, msghdr_netlink[nft_batch_msg]] {
    //      msghdr_netlink[nft_batch_msg] {
    //        addr: nil
    //        addrlen: len = 0x0 (4 bytes)
    //        pad = 0x0 (4 bytes)
    //        vec: ptr[in, iovec[in, nft_batch_msg]] {
    //          iovec[in, nft_batch_msg] {
    //            addr: ptr[inout, array[ANYUNION]] {
    //              array[ANYUNION] {
    //                union ANYUNION {
    //                  ANYBLOB: buffer: {14 00 00 00 10 00 04 00 00 00 00 00 00
    //                  00 00 00 00 00 00 0a 20 00 00 00 00 0a 01 02 00 00 00 00
    //                  00 00 00 00 01 00 00 00 09 00 01 00 73 79 7a 30 00 00 00
    //                  00 58 00 00 00 16 0a 01 00 00 00 00 00 00 00 00 00 01 00
    //                  00 00 09 00 01 00 73 79 7a 30 00 00 00 00 09 00 02 00 73
    //                  79 7a 30 00 00 00 00 2c 00 03 80 08 00 01 40 00 00 00 00
    //                  08 00 02 40 00 00 00 00 10 00 03 80 14 00 01 00 74 65 61
    //                  6d 30 00 00 00 00 00 00 00 00 00 00 00 5c 00 00 00 16 0a
    //                  01 01 00 0b 00 00 00 00 00 00 01 00 00 00 09 00 02 00 73
    //                  79 7a 30 00 00 00 00 09 00 01 00 73 79 7a 30 00 00 00 00
    //                  30 00 03 80 2c 00 03 80 14} (length 0xc1)
    //                }
    //              }
    //            }
    //            len: len = 0xfc (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*)0x200000000200 = 0;
    *(uint32_t*)0x200000000208 = 0;
    *(uint64_t*)0x200000000210 = 0x200000000000;
    *(uint64_t*)0x200000000000 = 0x200000000040;
    memcpy(
        (void*)0x200000000040,
        "\x14\x00\x00\x00\x10\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x0a\x20\x00\x00\x00\x00\x0a\x01\x02\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x01\x00\x00\x00\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00"
        "\x00\x58\x00\x00\x00\x16\x0a\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00"
        "\x01\x00\x00\x00\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x09"
        "\x00\x02\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x2c\x00\x03\x80\x08\x00"
        "\x01\x40\x00\x00\x00\x00\x08\x00\x02\x40\x00\x00\x00\x00\x10\x00\x03"
        "\x80\x14\x00\x01\x00\x74\x65\x61\x6d\x30\x00\x00\x00\x00\x00\x00\x00"
        "\x00\x00\x00\x00\x5c\x00\x00\x00\x16\x0a\x01\x01\x00\x0b\x00\x00\x00"
        "\x00\x00\x00\x01\x00\x00\x00\x09\x00\x02\x00\x73\x79\x7a\x30\x00\x00"
        "\x00\x00\x09\x00\x01\x00\x73\x79\x7a\x30\x00\x00\x00\x00\x30\x00\x03"
        "\x80\x2c\x00\x03\x80\x14",
        193);
    *(uint64_t*)0x200000000008 = 0xfc;
    *(uint64_t*)0x200000000218 = 1;
    *(uint64_t*)0x200000000220 = 0;
    *(uint64_t*)0x200000000228 = 0;
    *(uint32_t*)0x200000000230 = 0;
    syscall(__NR_sendmsg, /*fd=*/r[2], /*msg=*/0x200000000200ul, /*f=*/0ul);
    break;
  case 7:
    //  write$tun arguments: [
    //    fd: fd_tun (resource)
    //    buf: ptr[inout, array[ANYUNION]] {
    //      array[ANYUNION] {
    //        union ANYUNION {
    //          ANYBLOB: buffer: {00 00 86 dd 00 03 11 00 04 00 00 be 00 44 11
    //          8f 8e ec 67 77 2b 5a 83 80 3f 18 80 4b d0 71 e6 76 d4 6d c8 ab
    //          97 22 32 0e d3 ca a2 1e 75 d9 f8 e5 3f 29 e9 a5 0c 24 cc 07 35
    //          f3 63 fc a8 5c 3b bf d0 b2 41 57 54 ee a2 93 cd a0 87 9b a8 4d
    //          87 56 86 8c 29 36 f8 52 b9 58 af fa f4 9d cc 53 48 7f 02 69 b3
    //          b8 d8 88 3e 9a 2f 57 05 70 97 77 de cd ac 29 0c 4a 85 58 7e 1a
    //          62 db b5 3d 56 9a 74 f0 97 9f 03 43 f5 f7 d1 c7 3c 54 83 65 34
    //          05 77 32 2c 4c 1f 67 5d 45 b6 e2 7b f3 1c 14 67 aa 62 12 13 cb
    //          4c 56 7a a7 07 18 fa 68 83 fa 9a 99 60 10 f3 65 13 24 24 b2 20
    //          75 a3 38 2c 91 cc c0 79 2b 22 bd b1 f1 6a 5f 38 fa 3e 85 02 57
    //          ae 8e 55 93 ff 45 95 5e 62 b3 66 4c 10 cc 13 3f b6 7a e9 8a 61
    //          2d f7 53 78 2b eb 1b 27 bc b4 41 98 84 8a 99 98 ca 45 68 48 83
    //          17 3b 1e 45 e8 a3 ce b8 76 de 3d 81 82 e4 cc a2 4e dc b6 d0 4f
    //          27 10 41 b3 de 56 2e 8f 7d 65 97 3c 14 7a 15 6e 30 d4 be b8 98
    //          00 00 00 00 00 00 00 00 00 00 00 00 00} (length 0x12d)
    //        }
    //      }
    //    }
    //    count: len = 0xfdef (8 bytes)
    //  ]
    memcpy(
        (void*)0x200000000380,
        "\x00\x00\x86\xdd\x00\x03\x11\x00\x04\x00\x00\xbe\x00\x44\x11\x8f\x8e"
        "\xec\x67\x77\x2b\x5a\x83\x80\x3f\x18\x80\x4b\xd0\x71\xe6\x76\xd4\x6d"
        "\xc8\xab\x97\x22\x32\x0e\xd3\xca\xa2\x1e\x75\xd9\xf8\xe5\x3f\x29\xe9"
        "\xa5\x0c\x24\xcc\x07\x35\xf3\x63\xfc\xa8\x5c\x3b\xbf\xd0\xb2\x41\x57"
        "\x54\xee\xa2\x93\xcd\xa0\x87\x9b\xa8\x4d\x87\x56\x86\x8c\x29\x36\xf8"
        "\x52\xb9\x58\xaf\xfa\xf4\x9d\xcc\x53\x48\x7f\x02\x69\xb3\xb8\xd8\x88"
        "\x3e\x9a\x2f\x57\x05\x70\x97\x77\xde\xcd\xac\x29\x0c\x4a\x85\x58\x7e"
        "\x1a\x62\xdb\xb5\x3d\x56\x9a\x74\xf0\x97\x9f\x03\x43\xf5\xf7\xd1\xc7"
        "\x3c\x54\x83\x65\x34\x05\x77\x32\x2c\x4c\x1f\x67\x5d\x45\xb6\xe2\x7b"
        "\xf3\x1c\x14\x67\xaa\x62\x12\x13\xcb\x4c\x56\x7a\xa7\x07\x18\xfa\x68"
        "\x83\xfa\x9a\x99\x60\x10\xf3\x65\x13\x24\x24\xb2\x20\x75\xa3\x38\x2c"
        "\x91\xcc\xc0\x79\x2b\x22\xbd\xb1\xf1\x6a\x5f\x38\xfa\x3e\x85\x02\x57"
        "\xae\x8e\x55\x93\xff\x45\x95\x5e\x62\xb3\x66\x4c\x10\xcc\x13\x3f\xb6"
        "\x7a\xe9\x8a\x61\x2d\xf7\x53\x78\x2b\xeb\x1b\x27\xbc\xb4\x41\x98\x84"
        "\x8a\x99\x98\xca\x45\x68\x48\x83\x17\x3b\x1e\x45\xe8\xa3\xce\xb8\x76"
        "\xde\x3d\x81\x82\xe4\xcc\xa2\x4e\xdc\xb6\xd0\x4f\x27\x10\x41\xb3\xde"
        "\x56\x2e\x8f\x7d\x65\x97\x3c\x14\x7a\x15\x6e\x30\xd4\xbe\xb8\x98\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
        301);
    syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000380ul,
            /*count=*/0xfdeful);
    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 < 3; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}