// https://syzkaller.appspot.com/bug?id=edc4bdcf9437492a8287e70f7c3c4231511fe690
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <pwd.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#ifndef SYS_mknod
#define SYS_mknod 450
#endif
#ifndef SYS_mmap
#define SYS_mmap 197
#endif
#ifndef SYS_open
#define SYS_open 5
#endif
#ifndef SYS_writev
#define SYS_writev 121
#endif

static unsigned long long procid;

static void kill_and_wait(int pid, int* status)
{
  kill(pid, SIGKILL);
  while (waitpid(-1, status, 0) != pid) {
  }
}

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 execute_one(void);

#define WAIT_FLAGS 0

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      execute_one();
      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 < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x20001200, "./file0\000", 8);
  syscall(SYS_mknod, /*file=*/0x20001200ul, /*mode=*/0x2000ul, /*dev=*/0x400ul);
  memcpy((void*)0x20000000, "./file0\000", 8);
  res = syscall(SYS_open, /*file=*/0x20000000ul, /*flags=*/2ul, /*mode=*/0ul);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000180 = 0x20000080;
  memcpy((void*)0x20000080,
         "\xac\x7e\x5a\x9c\x34\x89\xc6\x9a\xb3\x47\x09\xac\x27\x05\xd5\xef\xba"
         "\x2d\x62\x06\xf2\xfc\xd0\x81\x21\xca\xbb\x6d\x3b\x53\xe2\xb9\x3b\x23"
         "\xad\xa7\x99\xfc\x32\x54\xfc\xc2\x6c\xdc\x3c\x63\xfd\xfb\xde\xef\xe9"
         "\x79\xbf\x1a\x21\xa3\xf7\x7d\x17\x0c\xd2\x01\x5f\x31\x70\x90\x67\xdd"
         "\xe1\xa3\x47\xfd\xa4\xed\x35\xe7\xbe\x69\xe8\xb4\x15\x7f\xd8\x93\xf9"
         "\x10\xf9\x07\xba\x76\x1a\xc5\x9a\x74\xd2\xe9\x78\x13\xd4\xcc\x26\x34"
         "\x2b\x6c\x41\x93\x2b\x94\x22\xba\x13\xb2\x95\x97\x99\xab\x3f\x1a\x43"
         "\x8f\x9b\x15\xdb\xf2\xcd\x6f\x6d\xd0\x26\xc5\x38\xda\x60\x15\x58\xa9"
         "\x3f\xa8\x6c\xe9\x4e\x39\x99\xf8\xfe\xdd\xca\x4c\xab\x06\x3e\x31\xf0"
         "\xef\xd1\xa8\xf5\x91\xe0\x62\xd1\xd9\xe7\x92\xdc\xe3\xf2\x7d\x68\x92",
         170);
  *(uint64_t*)0x20000188 = 0xaa;
  *(uint64_t*)0x20000190 = 0x20000140;
  memcpy((void*)0x20000140,
         "\x08\x3d\xc7\x59\x15\x20\x83\x95\x21\xc5\xf8\x5d\x89\xc4\xda\xfa\x02"
         "\x2a\x7b\xb5\x69\x49\xdb",
         23);
  *(uint64_t*)0x20000198 = 0x17;
  *(uint64_t*)0x200001a0 = 0;
  *(uint64_t*)0x200001a8 = 0;
  syscall(SYS_writev, /*fd=*/r[0], /*vec=*/0x20000180ul, /*vlen=*/3ul);
}
int main(void)
{
  syscall(SYS_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/3ul,
          /*flags=*/0x1012ul, /*fd=*/-1, /*pad=*/0ul, /*offset=*/0ul);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}