// https://syzkaller.appspot.com/bug?id=b5095bfec44ec84213bac54742a82483aad578ce
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>

#include <stdint.h>
#include <string.h>

static uintptr_t syz_open_procfs(uintptr_t a0, uintptr_t a1)
{

  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == (uintptr_t)-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;
}

static void test();

void loop()
{
  while (1) {
    test();
  }
}

long r[5];
void* thr(void* arg)
{
  switch ((long)arg) {
  case 0:
    syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
            0xfffffffffffffffful, 0x0ul);
    break;
  case 1:
    syscall(__NR_clone, 0x200ul, 0x20fbf000ul, 0x20744000ul,
            0x20f8b000ul, 0x200d5000ul);
    break;
  case 2:
    memcpy((void*)0x20f80000, "./file0", 8);
    syscall(__NR_mknod, 0x20f80000ul, 0x1040ul, 0x0ul);
    break;
  case 3:
    memcpy((void*)0x207c7000, "./file0", 8);
    syscall(__NR_execve, 0x207c7000ul, 0x20a7bfc8ul, 0x20f56000ul);
    break;
  case 4:
    memcpy((void*)0x20f9dffa, "stack", 6);
    r[0] = syz_open_procfs(0x0ul, 0x20f9dffaul);
    break;
  case 5:
    syscall(__NR_read, r[0], 0x20cb0ff8ul, 0x8ul);
    break;
  case 6:
    memcpy((void*)0x20c84feb, "net/ip6_tables_names", 21);
    r[1] = syz_open_procfs(0x0ul, 0x20c84febul);
    break;
  case 7:
    r[2] = syscall(__NR_socket, 0x2ul, 0x1ul, 0x0ul);
    break;
  case 8:
    r[3] = syscall(__NR_dup2, r[1], r[2]);
    break;
  case 9:
    if (syscall(__NR_pipe2, 0x20fdf000ul, 0x0ul) != -1) {
      r[4] = *(uint32_t*)0x20fdf004;
    }
    break;
  case 10:
    syscall(__NR_splice, r[3], 0x0ul, r[4], 0x0ul, 0x82ul, 0x0ul);
    break;
  }
  return 0;
}

void test()
{
  long i;
  pthread_t th[22];

  memset(r, -1, sizeof(r));
  for (i = 0; i < 11; i++) {
    pthread_create(&th[i], 0, thr, (void*)i);
    usleep(rand() % 10000);
  }
  usleep(rand() % 100000);
}

int main()
{
  int i;
  for (i = 0; i < 8; i++) {
    if (fork() == 0) {
      loop();
      return 0;
    }
  }
  sleep(1000000);
  return 0;
}