// 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 01 11 00 05 00 00 00 a6 0c 6e
    //          ec 00 be 00 45 2b 2f aa 04 63 b8 1c b0 c3 ca 01 f7 78 e8 a8 2d
    //          4f c7 d3 9c 75 2a ee 4d 2a 85 0c 03 9c b3 e1 6d 50 c4 ea 9e ff
    //          fd 9f f4 c2 04 42 3d 7f e9 cf 26 fc 73 9d d6 ab 37 87 61 b0 84
    //          6a 71 27 ff 73 a1 d1 b1 61 2c b2 38 e6 51 61 c2 43 12 f2 7c 4e
    //          d2 ea 21 55 78} (length 0x68)
    //        }
    //      }
    //    }
    //    count: len = 0xfdef (8 bytes)
    //  ]
    memcpy((void*)0x200000000440,
           "\x00\x00\x86\xdd\x00\x01\x11\x00\x05\x00\x00\x00\xa6\x0c\x6e\xec"
           "\x00\xbe\x00\x45\x2b\x2f\xaa\x04\x63\xb8\x1c\xb0\xc3\xca\x01\xf7"
           "\x78\xe8\xa8\x2d\x4f\xc7\xd3\x9c\x75\x2a\xee\x4d\x2a\x85\x0c\x03"
           "\x9c\xb3\xe1\x6d\x50\xc4\xea\x9e\xff\xfd\x9f\xf4\xc2\x04\x42\x3d"
           "\x7f\xe9\xcf\x26\xfc\x73\x9d\xd6\xab\x37\x87\x61\xb0\x84\x6a\x71"
           "\x27\xff\x73\xa1\xd1\xb1\x61\x2c\xb2\x38\xe6\x51\x61\xc2\x43\x12"
           "\xf2\x7c\x4e\xd2\xea\x21\x55\x78",
           104);
    syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000440ul,
            /*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;
}