// https://syzkaller.appspot.com/bug?id=39bf2d96fc10cd031b128ba7ecd997bc68b44b5a
// 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 <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 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);
  if (pthread_create(&th, &attr, fn, arg))
    exit(1);
  pthread_attr_destroy(&attr);
}

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);
}

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_RELAXED))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  int i;
  for (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) {
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

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)
{
  int i, call, thread;
  for (call = 0; call < 7; 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, 45);
      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;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      reset_test();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    syscall(__NR_clone, 0x8000000000000200, 0x200000c0, 0x20000900, 0x20000340,
            0x20000640);
    break;
  case 1:
    memcpy((void*)0x20000140, "./file0", 8);
    syscall(__NR_mknod, 0x20000140, 0x4000103e, 0);
    break;
  case 2:
    memcpy((void*)0x20000240, "./file0", 8);
    syscall(__NR_execve, 0x20000240, 0x20000200, 0x20000440);
    break;
  case 3:
    res = syscall(__NR_pipe, 0x20000040);
    if (res != -1) {
      r[0] = *(uint32_t*)0x20000040;
      r[1] = *(uint32_t*)0x20000044;
    }
    break;
  case 4:
    memcpy((void*)0x20000000, "/proc/thread-self/attr/exec", 28);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000000, 2, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 5:
    syscall(__NR_splice, r[0], 0, r[2], 0, 0x8ec0, 1);
    break;
  case 6:
    *(uint64_t*)0x20002180 = 0x20000280;
    memcpy((void*)0x20000280,
           "\x02\x23\xb1\x92\x4e\x7a\x40\x5e\x0c\xbc\xe5\x38\x38\x3f\x9b\x8c"
           "\x40\x38\x44\xf2\x8a\xd6\xca\x6a\x68\x30\xa4\x51\xd6\xd9\x04\x57"
           "\x97\xae\x13\xee\x1d\xa1\x8e\x5b\xc1\xdd\x98\x01\x46\xae\x97\xf3"
           "\xda\x5a\x53\xdd\x93\x5b\x89\x74\x00\x04\x00\x00\x00\x00\x00\x00"
           "\x56\x16\xb3\xaf\x74\xfd\xea\x3f\x94\x14\x07\xc9\xcb\x0b\x9a\xa7"
           "\xeb\x35\xcb\xd0\xac\x4c\x65\xc7\xdb\x8e\xee\x38\xa3\xb7\xe7\x72"
           "\x36\x33\x80\x4e\xa4\x4d\x2b\xaf\xe8\x12\x43\x1a\xdd\x29\x0e\xe3"
           "\xd8\x66\x8a\x3f\x8a\x7a\x2f\xd9\x71\x44\x6c\x1b\x83\x6a\xac\x23"
           "\x80\x89\xc0\xf7\xa7\x33\xfd\x3d\x34\x26\x6b\xc2\x72\x0c\xa6\x78"
           "\xeb\x05\xcc\x04\x83\x4d\x58\x7d\x4c\x52\xa4\xfa\xb1\xe5\x6c\xa3"
           "\xae\xd8\xdc\xcf\x31\xdf\x6b\x70\xf8\x1c\x23\x2a\x67\x35\xc7\x0b"
           "\x45\x9e\x20\x41\x58\xbf\x05\xe7\xe7\x8f\x06\xde\x85\x31\x2e\x80"
           "\xb8\x93\x29\x48\x32\x15\x6c\xeb\xb6\x13\x01\x7e\x10\xb1\x48\x9f"
           "\xb6\xf2\xed\x9f\x78\xa9\x8b\x8c\x12\x6f\x72\x4e\xba\xe1\x2a\xa5"
           "\x03\xec\x78\x16\x60\x78\xe2\x5f\x73\xe7\xc4\xbd\x85\x6b\x95\xdd"
           "\xe2\x99\x55\x0a\xe3\xdc\xf4\x66\x2e\xab\x90\x8d\xaa\xb0\x25\x15"
           "\x79\x93\xf3\x27\x29\x0b\x37\xf9\x99\xea\xf5\x4b\x3d\x7a\x6d\x23"
           "\x43\x04\xdf\x45\xfd\x04\xfb\xa4\x35\x9e\x7d\xe1\xff\x9d\xfc\x16"
           "\x9f\x46\x8c\x82\x74\xe8\xd5\x58\x7c\x56\x46\x7a\xcb\x8d\x72\x0b"
           "\x03\x08\xf5\x8a\x0f\x37\xe3\xdc\xf9\x33\xd0\x1b\x70\x35\x8c\x6f"
           "\x9e\x30\xa1\x20\x5e\xf3\xe9\x54\x91\xa2\xce\x51\x6f\x4f\x40\x50"
           "\xd3\xe0\x08\x67\xa5\x53\x02\x89\x9b\xf0\xb6\x71\x40\x86\x9e\x0f"
           "\x1e\x1d\x4a\xbc\xaa\xa2\x32\x54\x7c\xed\xd5\x05\x0d\xb0\x45\x9d"
           "\x4b\x26\xcf\x2f\xd2\x57\x4b\x69\x4b\xd6\x51\xd0\x25\xd6\x02\x91"
           "\xb1\xbe\x68\x9f\x5f\x25\x29\xe4\x6c\x8d\x44\x45\x88\x89\xdb\x01"
           "\xaa\xa2\x91\x3b\x7a\xfb\xcb\x5b\xce",
           409);
    *(uint64_t*)0x20002188 = 0x199;
    syscall(__NR_vmsplice, r[1], 0x20002180, 1, 0);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  loop();
  return 0;
}