// https://syzkaller.appspot.com/bug?id=b61716c2020c98e885af88c7de5896425947313f
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <linux/futex.h>
#include <pthread.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void execute_one();
extern unsigned long long procid;

static void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("clone failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      execute_one();
      int fd;
      for (fd = 3; fd < 30; fd++)
        close(fd);
      doexit(0);
    }

    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid) {
        break;
      }
      usleep(1000);
      if (current_time_ms() - start < 5 * 1000)
        continue;
      kill(-pid, SIGKILL);
      kill(pid, SIGKILL);
      while (waitpid(-1, &status, __WALL) != pid) {
      }
      break;
    }
  }
}

struct thread_t {
  int created, running, call;
  pthread_t th;
};

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

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE))
      syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE);
    syscall(SYS_futex, &th->running, FUTEX_WAKE);
  }
  return 0;
}

static void execute(int num_calls)
{
  int call, thread;
  running = 0;
  for (call = 0; call < num_calls; call++) {
    for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        pthread_attr_t attr;
        pthread_attr_init(&attr);
        pthread_attr_setstacksize(&attr, 128 << 10);
        pthread_create(&th->th, &attr, thr, th);
      }
      if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) {
        th->call = call;
        __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE);
        syscall(SYS_futex, &th->running, FUTEX_WAKE);
        if (collide && call % 2)
          break;
        struct timespec ts;
        ts.tv_sec = 0;
        ts.tv_nsec = 20 * 1000 * 1000;
        syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts);
        if (__atomic_load_n(&running, __ATOMIC_RELAXED))
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    memcpy((void*)0x20000000, "./file0", 8);
    syscall(__NR_mkdirat, 0xffffff9c, 0x20000000, 0);
    break;
  case 1:
    memcpy((void*)0x20000100, "/dev/fuse", 10);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 2, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    memcpy((void*)0x20000200, "./file0", 8);
    memcpy((void*)0x20000300, "fuse", 5);
    memcpy((void*)0x20000400, "fd", 2);
    *(uint8_t*)0x20000402 = 0x3d;
    sprintf((char*)0x20000403, "0x%016llx", (long long)r[0]);
    *(uint8_t*)0x20000415 = 0x2c;
    memcpy((void*)0x20000416, "rootmode", 8);
    *(uint8_t*)0x2000041e = 0x3d;
    sprintf((char*)0x2000041f, "%023llo", (long long)0x4000);
    *(uint8_t*)0x20000436 = 0x2c;
    memcpy((void*)0x20000437, "user_id", 7);
    *(uint8_t*)0x2000043e = 0x3d;
    sprintf((char*)0x2000043f, "%020llu", (long long)0);
    *(uint8_t*)0x20000453 = 0x2c;
    memcpy((void*)0x20000454, "group_id", 8);
    *(uint8_t*)0x2000045c = 0x3d;
    sprintf((char*)0x2000045d, "%020llu", (long long)0);
    *(uint8_t*)0x20000471 = 0x2c;
    *(uint8_t*)0x20000472 = 0;
    syscall(__NR_mount, 0, 0x20000200, 0x20000300, 0, 0x20000400);
    break;
  case 3:
    syscall(__NR_read, r[0], 0x20001000, 0x1000);
    break;
  case 4:
    *(uint32_t*)0x20000100 = 0x50;
    *(uint32_t*)0x20000104 = 0;
    *(uint64_t*)0x20000108 = 1;
    *(uint32_t*)0x20000110 = 7;
    *(uint32_t*)0x20000114 = 0x1b;
    *(uint32_t*)0x20000118 = 0xffff0000;
    *(uint32_t*)0x2000011c = 0;
    *(uint16_t*)0x20000120 = 3;
    *(uint16_t*)0x20000122 = 0;
    *(uint32_t*)0x20000124 = 0;
    *(uint32_t*)0x20000128 = 0;
    *(uint32_t*)0x2000012c = 0;
    *(uint32_t*)0x20000130 = 0;
    *(uint32_t*)0x20000134 = 0;
    *(uint32_t*)0x20000138 = 0;
    *(uint32_t*)0x2000013c = 0;
    *(uint32_t*)0x20000140 = 0;
    *(uint32_t*)0x20000144 = 0;
    *(uint32_t*)0x20000148 = 0;
    *(uint32_t*)0x2000014c = 0;
    syscall(__NR_write, r[0], 0x20000100, 0x50);
    break;
  case 5:
    memcpy((void*)0x20000000, "./file0", 8);
    syscall(__NR_mkdirat, 0xffffff9c, 0x20000000, 0);
    break;
  case 6:
    memcpy((void*)0x200004c0, "/dev/fuse", 10);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x200004c0, 2, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 7:
    memcpy((void*)0x20000200, "./file0", 8);
    memcpy((void*)0x20000300, "fuse", 5);
    memcpy((void*)0x20000400, "fd", 2);
    *(uint8_t*)0x20000402 = 0x3d;
    sprintf((char*)0x20000403, "0x%016llx", (long long)r[1]);
    *(uint8_t*)0x20000415 = 0x2c;
    memcpy((void*)0x20000416, "rootmode", 8);
    *(uint8_t*)0x2000041e = 0x3d;
    sprintf((char*)0x2000041f, "%023llo", (long long)0x4000);
    *(uint8_t*)0x20000436 = 0x2c;
    memcpy((void*)0x20000437, "user_id", 7);
    *(uint8_t*)0x2000043e = 0x3d;
    sprintf((char*)0x2000043f, "%020llu", (long long)0);
    *(uint8_t*)0x20000453 = 0x2c;
    memcpy((void*)0x20000454, "group_id", 8);
    *(uint8_t*)0x2000045c = 0x3d;
    sprintf((char*)0x2000045d, "%020llu", (long long)0);
    *(uint8_t*)0x20000471 = 0x2c;
    *(uint8_t*)0x20000472 = 0;
    syscall(__NR_mount, 0, 0x20000200, 0x20000300, 0, 0x20000400);
    break;
  case 8:
    syscall(__NR_read, r[1], 0x20002000, 0x1000);
    break;
  case 9:
    *(uint32_t*)0x20000040 = 0x30;
    *(uint32_t*)0x20000044 = 5;
    *(uint64_t*)0x20000048 = 0;
    *(uint64_t*)0x20000050 = 0;
    *(uint64_t*)0x20000058 = 1;
    *(uint64_t*)0x20000060 = 0;
    *(uint32_t*)0x20000068 = 0;
    *(uint32_t*)0x2000006c = 0;
    syscall(__NR_write, r[1], 0x20000040, 0x30);
    break;
  case 10:
    syscall(__NR_read, r[1], 0x20001000, 0x1000);
    break;
  case 11:
    memcpy((void*)0x20000080, "/dev/autofs", 12);
    syscall(__NR_openat, 0xffffffffffffff9c, 0x20000080, 0x4000, 0);
    break;
  case 12:
    *(uint32_t*)0x20000100 = 0x50;
    *(uint32_t*)0x20000104 = 0;
    *(uint64_t*)0x20000108 = 1;
    *(uint32_t*)0x20000110 = 7;
    *(uint32_t*)0x20000114 = 0x1b;
    *(uint32_t*)0x20000118 = 0;
    *(uint32_t*)0x2000011c = 0;
    *(uint16_t*)0x20000120 = 0;
    *(uint16_t*)0x20000122 = 0;
    *(uint32_t*)0x20000124 = 0;
    *(uint32_t*)0x20000128 = 0;
    *(uint32_t*)0x2000012c = 0;
    *(uint32_t*)0x20000130 = 0;
    *(uint32_t*)0x20000134 = 0;
    *(uint32_t*)0x20000138 = 0;
    *(uint32_t*)0x2000013c = 0;
    *(uint32_t*)0x20000140 = 0;
    *(uint32_t*)0x20000144 = 0;
    *(uint32_t*)0x20000148 = 0;
    *(uint32_t*)0x2000014c = 0;
    syscall(__NR_write, r[1], 0x20000100, 0x50);
    break;
  case 13:
    memcpy((void*)0x20000040, "./file0", 8);
    syscall(__NR_mkdirat, 0xffffff9c, 0x20000040, 0);
    break;
  case 14:
    memcpy((void*)0x20000200, "./file0", 8);
    memcpy((void*)0x20000300, "fuse", 5);
    memcpy((void*)0x20000400, "fd", 2);
    *(uint8_t*)0x20000402 = 0x3d;
    sprintf((char*)0x20000403, "0x%016llx", (long long)-1);
    *(uint8_t*)0x20000415 = 0x2c;
    memcpy((void*)0x20000416, "rootmode", 8);
    *(uint8_t*)0x2000041e = 0x3d;
    sprintf((char*)0x2000041f, "%023llo", (long long)0x4000);
    *(uint8_t*)0x20000436 = 0x2c;
    memcpy((void*)0x20000437, "user_id", 7);
    *(uint8_t*)0x2000043e = 0x3d;
    sprintf((char*)0x2000043f, "%020llu", (long long)0);
    *(uint8_t*)0x20000453 = 0x2c;
    memcpy((void*)0x20000454, "group_id", 8);
    *(uint8_t*)0x2000045c = 0x3d;
    sprintf((char*)0x2000045d, "%020llu", (long long)0);
    *(uint8_t*)0x20000471 = 0x2c;
    *(uint8_t*)0x20000472 = 0;
    syscall(__NR_mount, 0, 0x20000200, 0x20000300, 4, 0x20000400);
    break;
  case 15:
    memcpy((void*)0x20000000, "./file0", 8);
    syscall(__NR_mkdirat, 0xffffff9c, 0x20000000, 0);
    break;
  case 16:
    memcpy((void*)0x20000100, "/dev/fuse", 10);
    res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 2, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 17:
    memcpy((void*)0x20000040, "./file0", 8);
    memcpy((void*)0x20000300, "fuse", 5);
    memcpy((void*)0x20000400, "fd", 2);
    *(uint8_t*)0x20000402 = 0x3d;
    sprintf((char*)0x20000403, "0x%016llx", (long long)r[2]);
    *(uint8_t*)0x20000415 = 0x2c;
    memcpy((void*)0x20000416, "rootmode", 8);
    *(uint8_t*)0x2000041e = 0x3d;
    sprintf((char*)0x2000041f, "%023llo", (long long)0x4000);
    *(uint8_t*)0x20000436 = 0x2c;
    memcpy((void*)0x20000437, "user_id", 7);
    *(uint8_t*)0x2000043e = 0x3d;
    sprintf((char*)0x2000043f, "%020llu", (long long)0);
    *(uint8_t*)0x20000453 = 0x2c;
    memcpy((void*)0x20000454, "group_id", 8);
    *(uint8_t*)0x2000045c = 0x3d;
    sprintf((char*)0x2000045d, "%020llu", (long long)0);
    *(uint8_t*)0x20000471 = 0x2c;
    *(uint8_t*)0x20000472 = 0;
    syscall(__NR_mount, 0, 0x20000040, 0x20000300, 0, 0x20000400);
    break;
  case 18:
    syscall(__NR_read, r[2], 0x20001000, 0x1000);
    break;
  case 19:
    *(uint32_t*)0x20000100 = 0x50;
    *(uint32_t*)0x20000104 = 0;
    *(uint64_t*)0x20000108 = 1;
    *(uint32_t*)0x20000110 = 7;
    *(uint32_t*)0x20000114 = 0x1b;
    *(uint32_t*)0x20000118 = 0;
    *(uint32_t*)0x2000011c = 0x40800;
    *(uint16_t*)0x20000120 = 0;
    *(uint16_t*)0x20000122 = 0;
    *(uint32_t*)0x20000124 = 0;
    *(uint32_t*)0x20000128 = 0;
    *(uint32_t*)0x2000012c = 0;
    *(uint32_t*)0x20000130 = 0;
    *(uint32_t*)0x20000134 = 0;
    *(uint32_t*)0x20000138 = 0;
    *(uint32_t*)0x2000013c = 0;
    *(uint32_t*)0x20000140 = 0;
    *(uint32_t*)0x20000144 = 0;
    *(uint32_t*)0x20000148 = 0;
    *(uint32_t*)0x2000014c = 0;
    syscall(__NR_write, r[2], 0x20000100, 0x50);
    break;
  case 20:
    memcpy((void*)0x20000500, "./file0/file0", 14);
    syscall(__NR_mkdirat, 0xffffff9c, 0x20000500, 0);
    break;
  case 21:
    syscall(__NR_read, r[2], 0x20001000, 0x1000);
    break;
  case 22:
    *(uint32_t*)0x20002000 = 0x90;
    *(uint32_t*)0x20002004 = 0;
    *(uint64_t*)0x20002008 = 2;
    *(uint64_t*)0x20002010 = 0;
    *(uint64_t*)0x20002018 = 0;
    *(uint64_t*)0x20002020 = 0;
    *(uint64_t*)0x20002028 = 0;
    *(uint32_t*)0x20002030 = 0;
    *(uint32_t*)0x20002034 = 0;
    *(uint64_t*)0x20002038 = 0;
    *(uint64_t*)0x20002040 = 0;
    *(uint64_t*)0x20002048 = 0;
    *(uint64_t*)0x20002050 = 0;
    *(uint64_t*)0x20002058 = 0;
    *(uint64_t*)0x20002060 = 0;
    *(uint32_t*)0x20002068 = 0;
    *(uint32_t*)0x2000206c = 0;
    *(uint32_t*)0x20002070 = 0;
    *(uint32_t*)0x20002074 = 0;
    *(uint32_t*)0x20002078 = 0;
    *(uint32_t*)0x2000207c = 0;
    *(uint32_t*)0x20002080 = 0;
    *(uint32_t*)0x20002084 = 0;
    *(uint32_t*)0x20002088 = 0;
    *(uint32_t*)0x2000208c = 0;
    syscall(__NR_write, r[2], 0x20002000, 0x90);
    break;
  case 23:
    syscall(__NR_read, r[2], 0x20001000, 0x1000);
    break;
  case 24:
    *(uint32_t*)0x20003000 = 0x90;
    *(uint32_t*)0x20003004 = 0;
    *(uint64_t*)0x20003008 = 3;
    *(uint64_t*)0x20003010 = 2;
    *(uint64_t*)0x20003018 = 0;
    *(uint64_t*)0x20003020 = 0;
    *(uint64_t*)0x20003028 = 0;
    *(uint32_t*)0x20003030 = 0;
    *(uint32_t*)0x20003034 = 0;
    *(uint64_t*)0x20003038 = 0;
    *(uint64_t*)0x20003040 = 0;
    *(uint64_t*)0x20003048 = 0;
    *(uint64_t*)0x20003050 = 0;
    *(uint64_t*)0x20003058 = 0;
    *(uint64_t*)0x20003060 = 0;
    *(uint32_t*)0x20003068 = 0;
    *(uint32_t*)0x2000306c = 0;
    *(uint32_t*)0x20003070 = 0;
    *(uint32_t*)0x20003074 = 0x4000;
    *(uint32_t*)0x20003078 = 0;
    *(uint32_t*)0x2000307c = 0;
    *(uint32_t*)0x20003080 = 0;
    *(uint32_t*)0x20003084 = 0;
    *(uint32_t*)0x20003088 = 0;
    *(uint32_t*)0x2000308c = 0;
    syscall(__NR_write, r[2], 0x20003000, 0x90);
    break;
  case 25:
    syscall(__NR_read, -1, 0x20001000, 0x1000);
    break;
  case 26:
    *(uint32_t*)0x20000100 = 0x50;
    *(uint32_t*)0x20000104 = 0;
    *(uint64_t*)0x20000108 = 1;
    *(uint32_t*)0x20000110 = 7;
    *(uint32_t*)0x20000114 = 0x1b;
    *(uint32_t*)0x20000118 = 0;
    *(uint32_t*)0x2000011c = 0;
    *(uint16_t*)0x20000120 = 0;
    *(uint16_t*)0x20000122 = 0;
    *(uint32_t*)0x20000124 = 0;
    *(uint32_t*)0x20000128 = 0;
    *(uint32_t*)0x2000012c = 0;
    *(uint32_t*)0x20000130 = 0;
    *(uint32_t*)0x20000134 = 0;
    *(uint32_t*)0x20000138 = 0;
    *(uint32_t*)0x2000013c = 0;
    *(uint32_t*)0x20000140 = 0;
    *(uint32_t*)0x20000144 = 0;
    *(uint32_t*)0x20000148 = 0;
    *(uint32_t*)0x2000014c = 0;
    syscall(__NR_write, -1, 0x20000100, 0x50);
    break;
  case 27:
    syscall(__NR_read, -1, 0x20001000, 0x1000);
    break;
  case 28:
    *(uint32_t*)0x20002000 = 0x90;
    *(uint32_t*)0x20002004 = 0;
    *(uint64_t*)0x20002008 = 2;
    *(uint64_t*)0x20002010 = 0;
    *(uint64_t*)0x20002018 = 0;
    *(uint64_t*)0x20002020 = 0;
    *(uint64_t*)0x20002028 = 0;
    *(uint32_t*)0x20002030 = 0;
    *(uint32_t*)0x20002034 = 0;
    *(uint64_t*)0x20002038 = 0;
    *(uint64_t*)0x20002040 = 0;
    *(uint64_t*)0x20002048 = 0;
    *(uint64_t*)0x20002050 = 0;
    *(uint64_t*)0x20002058 = 0;
    *(uint64_t*)0x20002060 = 0;
    *(uint32_t*)0x20002068 = 0;
    *(uint32_t*)0x2000206c = 0;
    *(uint32_t*)0x20002070 = 0;
    *(uint32_t*)0x20002074 = 0;
    *(uint32_t*)0x20002078 = 0;
    *(uint32_t*)0x2000207c = 0;
    *(uint32_t*)0x20002080 = 0;
    *(uint32_t*)0x20002084 = 0;
    *(uint32_t*)0x20002088 = 0;
    *(uint32_t*)0x2000208c = 0;
    syscall(__NR_write, -1, 0x20002000, 0x90);
    break;
  case 29:
    syscall(__NR_read, -1, 0x20001000, 0x1000);
    break;
  case 30:
    *(uint32_t*)0x20003000 = 0x90;
    *(uint32_t*)0x20003004 = 0;
    *(uint64_t*)0x20003008 = 3;
    *(uint64_t*)0x20003010 = 2;
    *(uint64_t*)0x20003018 = 0;
    *(uint64_t*)0x20003020 = 0;
    *(uint64_t*)0x20003028 = 0x3ff;
    *(uint32_t*)0x20003030 = 8;
    *(uint32_t*)0x20003034 = 0;
    *(uint64_t*)0x20003038 = 0;
    *(uint64_t*)0x20003040 = 0;
    *(uint64_t*)0x20003048 = 0;
    *(uint64_t*)0x20003050 = 0;
    *(uint64_t*)0x20003058 = 0;
    *(uint64_t*)0x20003060 = 0;
    *(uint32_t*)0x20003068 = 0;
    *(uint32_t*)0x2000306c = 0;
    *(uint32_t*)0x20003070 = 0;
    *(uint32_t*)0x20003074 = 0x4000;
    *(uint32_t*)0x20003078 = 0;
    *(uint32_t*)0x2000307c = 0;
    *(uint32_t*)0x20003080 = 0;
    *(uint32_t*)0x20003084 = 0;
    *(uint32_t*)0x20003088 = 0;
    *(uint32_t*)0x2000308c = 0;
    syscall(__NR_write, -1, 0x20003000, 0x90);
    break;
  case 31:
    syscall(__NR_read, -1, 0x20002000, 0x1000);
    break;
  case 32:
    *(uint32_t*)0x20000100 = 0x50;
    *(uint32_t*)0x20000104 = 0;
    *(uint64_t*)0x20000108 = 1;
    *(uint32_t*)0x20000110 = 7;
    *(uint32_t*)0x20000114 = 0x1b;
    *(uint32_t*)0x20000118 = 0;
    *(uint32_t*)0x2000011c = 0xffff0000;
    *(uint16_t*)0x20000120 = 0;
    *(uint16_t*)0x20000122 = 0;
    *(uint32_t*)0x20000124 = 0;
    *(uint32_t*)0x20000128 = 0;
    *(uint32_t*)0x2000012c = 0;
    *(uint32_t*)0x20000130 = 0;
    *(uint32_t*)0x20000134 = 0;
    *(uint32_t*)0x20000138 = 0;
    *(uint32_t*)0x2000013c = 0;
    *(uint32_t*)0x20000140 = 0;
    *(uint32_t*)0x20000144 = 0;
    *(uint32_t*)0x20000148 = 0;
    *(uint32_t*)0x2000014c = 0;
    syscall(__NR_write, -1, 0x20000100, 0x50);
    break;
  }
}

void execute_one()
{
  execute(33);
  collide = 1;
  execute(33);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (;;) {
    loop();
  }
}