// https://syzkaller.appspot.com/bug?id=78e9ad0e6952a3ca16e8234724b2fa92d041b9b8
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.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;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0x0};
unsigned long long procid;
void execute_one()
{
  long res = 0;
  memcpy((void*)0x20000000, "/dev/nullb0", 12);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000000, 0x4002, 0);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000cc0, "/dev/vcs", 9);
  syscall(__NR_openat, 0xffffffffffffff9c, 0x20000cc0, 0x8040, 0);
  res = syscall(__NR_io_setup, 0x45ab, 0x20000240);
  if (res != -1)
    r[1] = *(uint64_t*)0x20000240;
  *(uint64_t*)0x20001540 = 0x20000140;
  *(uint64_t*)0x20000140 = 0;
  *(uint32_t*)0x20000148 = 0;
  *(uint32_t*)0x2000014c = 0;
  *(uint16_t*)0x20000150 = 1;
  *(uint16_t*)0x20000152 = 0;
  *(uint32_t*)0x20000154 = r[0];
  *(uint64_t*)0x20000158 = 0x20000000;
  *(uint64_t*)0x20000160 = 0xfffffce4;
  *(uint64_t*)0x20000168 = 0;
  *(uint64_t*)0x20000170 = 0;
  *(uint32_t*)0x20000178 = 0;
  *(uint32_t*)0x2000017c = -1;
  syscall(__NR_io_submit, r[1], 0x111, 0x20001540);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      for (;;) {
        loop();
      }
    }
  }
  sleep(1000000);
  return 0;
}