// https://syzkaller.appspot.com/bug?id=898819aa10260a468a0191c309b066cc36437d7d
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

static long syz_open_procfs(long a0, long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == -1) {
    snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1);
  } else {
    snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1);
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  return fd;
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  long res = 0;
  memcpy((void*)0x20000140, "stack", 6);
  res = syz_open_procfs(0, 0x20000140);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_socketpair, 1, 2, 0, 0x200000c0);
  if (res != -1)
    r[1] = *(uint32_t*)0x200000c0;
  syscall(__NR_sendfile, r[1], r[0], 0, 4);
  memcpy((void*)0x20000040, "./file0", 8);
  syscall(__NR_mknod, 0x20000040, 0x808000001040, 0);
  syscall(__NR_clone, 0x3102001ffe, 0, 0x9999999999999999, 0, -1);
  memcpy((void*)0x20000140, "./file0", 8);
  syscall(__NR_execve, 0x20000140, 0, 0);
  res = syscall(__NR_pipe2, 0x20000080, 0);
  if (res != -1)
    r[2] = *(uint32_t*)0x20000084;
  memcpy((void*)0x20000180, "/proc/self/net/pfkey", 21);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000180, 0, 0);
  if (res != -1)
    r[3] = res;
  syscall(__NR_splice, r[3], 0, r[2], 0, 2, 0);
  return 0;
}