// https://syzkaller.appspot.com/bug?id=a74718ca902617e6aa7327aa008b25844eccf2d3
// 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>

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;
}

#define __syscall syscall

static void execute_one(void);

#define WAIT_FLAGS 0

static void loop(void)
{
  int iter;
  for (iter = 0;; 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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(SYS_socketpair, 1, 1, 0, 0x20000040);
  if (res != -1) {
    r[0] = *(uint32_t*)0x20000040;
    r[1] = *(uint32_t*)0x20000044;
  }
  memcpy((void*)0x20000200, "/dev/bpf\000", 9);
  res = syscall(SYS_openat, 0xffffffffffffff9c, 0x20000200, 0, 0);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x200000c0 = 0;
  *(uint32_t*)0x200000c8 = 0;
  *(uint64_t*)0x200000d0 = 0;
  *(uint64_t*)0x200000d8 = 0;
  *(uint64_t*)0x200000e0 = 0x20000100;
  memcpy((void*)0x20000100,
         "\x28\x00\x00\x00\xff\xff\x00\x00\x01\x00\x00\x00\x08\xcd\x7f\xdf\x03"
         "\x00\x00\x00",
         20);
  *(uint32_t*)0x20000114 = r[1];
  *(uint32_t*)0x20000118 = r[2];
  *(uint32_t*)0x2000011c = 0;
  *(uint32_t*)0x20000120 = r[0];
  *(uint32_t*)0x20000124 = r[1];
  *(uint64_t*)0x200000e8 = 0x28;
  *(uint32_t*)0x200000f0 = 0;
  syscall(SYS_sendmsg, r[1], 0x200000c0, 0);
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000, 0x1000000, 3, 0x1012, -1, 0, 0);
  loop();
  return 0;
}