// https://syzkaller.appspot.com/bug?id=3600bb95d29f679b10596a509fe14da871b45b70
// 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_dup2
#define SYS_dup2 90
#endif
#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[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x20000000, "./file0\000", 8);
  syscall(SYS_mknod, /*file=*/0x20000000ul, /*mode=*/0x80002005ul, /*dev=*/0ul);
  memcpy((void*)0x20000000, "./file0\000", 8);
  res = syscall(SYS_open, /*file=*/0x20000000ul, /*flags=*/2ul, /*mode=*/0ul);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000000, "./file0\000", 8);
  res = syscall(SYS_open, /*file=*/0x20000000ul, /*flags=*/0ul, /*mode=*/0ul);
  if (res != -1)
    r[1] = res;
  res = syscall(SYS_dup2, /*oldfd=*/r[0], /*newfd=*/r[1]);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x20000200 = -1;
  *(uint64_t*)0x20000208 = 0x45;
  *(uint64_t*)0x20000210 = 0x20000240;
  memcpy((void*)0x20000240,
         "\x09\xa9\x45\x46\x8a\x23\x5d\xe1\x98\x65\xc2\xe4\x77\xa6\x00\x27\x0d"
         "\x5c\xe2\x32\xbb\x6d\x62\xdd\x78\xcd\xf8\x46\xe2\x6e\xfb\x50\x22\x7c"
         "\x7d\x80\x3d\x59\xf6\x56\x09\x4d\x86\x60\x51\xdb\xac\x8f\x92\x66\x53"
         "\x47\xe1\xd2\x67\x8c\x12\x43\x72\x25\xf0\x41\x59\x74\x3b\x67\xac\xbd"
         "\x49\x2b\x50\x18\x27\xc0\x2f\x66\x3b\xee\xb9\x13\x42\x3e",
         82);
  *(uint64_t*)0x20000218 = 0x52;
  *(uint64_t*)0x20000220 = 0x20000140;
  memcpy((void*)0x20000140,
         "\x7c\xa1\xe3\x7a\x9b\x2c\x86\xec\xbe\xf9\xb8\x64\x8b\xa0\xb7\xc2\x51"
         "\xc6\xa2\x02\xce\xdf\x15\x7e\x49\xab\x47\xf2\x3c\x92\xa9\xc5\xc7\xdc"
         "\xb0\x92\x75\x30\x78\xfd\xb8\x7f\x8d\x21\x70\x32\x27\x7d\x55\xc3\x81"
         "\x36\x3d\x39\x20\x32\x81\xd4\xa5\x92\x03\x72\x50\xde\x4a\xc2\x93\xbd"
         "\x3f\x3a\x2e\xd3\x17\xcd\xd9\x46\x87\xd3\x99\x66\xc2\x9e\x62\x7d\x6d"
         "\xd1\x89\xab\x11\xb0\x29\x78\x37\x5c\xd1\x2b\x32\x1a\xf5\x48\xa9\x1d"
         "\xf9\x1e\xc7\xf1\x9d\x04\xa1\xe7\xd9\x89\x53\x1e\x14\x1e\xa8\x0e\xf4"
         "\x04\x6a\xc1\x9b\xe1\xac\xcf\x1b\x17\xe0\xc3\x4d\x5f\x08\xf5\x50\x18"
         "\x7b\x5b\xe7\xd0\x21\x74\x13\xa4\xc4\xee\x86\xea\x52\x94\xaa\xa1\x03"
         "\xf2\xb7\x91\x89\x8f\x09\x5d\x93\x2e\x3c",
         163);
  *(uint64_t*)0x20000228 = 0xa3;
  syscall(SYS_writev, /*fd=*/r[2], /*vec=*/0x20000200ul, /*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;
}