// https://syzkaller.appspot.com/bug?id=5b91762c24dc0a4ff2a974ddf8d10713e0026f5a
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <linux/futex.h>
#include <pthread.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/syscall.h>
#include <unistd.h>

struct thread_t {
  int created, running, call;
  pthread_t th;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;
static int collide;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE))
      syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE);
    syscall(SYS_futex, &th->running, FUTEX_WAKE);
  }
  return 0;
}

static void execute(int num_calls)
{
  int call, thread;
  running = 0;
  for (call = 0; call < num_calls; call++) {
    for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        pthread_attr_t attr;
        pthread_attr_init(&attr);
        pthread_attr_setstacksize(&attr, 128 << 10);
        pthread_create(&th->th, &attr, thr, th);
      }
      if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) {
        th->call = call;
        __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE);
        syscall(SYS_futex, &th->running, FUTEX_WAKE);
        if (collide && call % 2)
          break;
        struct timespec ts;
        ts.tv_sec = 0;
        ts.tv_nsec = 20 * 1000 * 1000;
        syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts);
        if (running)
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    memcpy((void*)0x20000140, "./file0/file0", 14);
    syscall(__NR_open, 0x20000140, 0, 0);
    break;
  case 1:
    memcpy((void*)0x200001c0, "./file0", 8);
    res = syscall(__NR_open, 0x200001c0, 0x1fffe, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    res = syscall(__NR_socket, 2, 6, 0);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    memcpy((void*)0x20000880, "\x73\x65\x63\x75\x72\x69\x74\x79\x00\x00\x00\x00"
                              "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                              "\x00\x00\x00\x00\x00\x00\x00\x00",
           32);
    *(uint32_t*)0x200008a0 = 3;
    *(uint64_t*)0x200008a8 = 0;
    *(uint64_t*)0x200008b0 = 0;
    *(uint64_t*)0x200008b8 = 0;
    *(uint64_t*)0x200008c0 = 0;
    *(uint64_t*)0x200008c8 = 0;
    *(uint64_t*)0x200008d0 = 0;
    syscall(__NR_setsockopt, r[1], 0, 0x41, 0x20000880, 0x58);
    break;
  case 4:
    *(uint64_t*)0x20000840 = 0x20000100;
    *(uint64_t*)0x20000848 = 0;
    syscall(__NR_pwritev, -1, 0x20000840, 1, 0);
    break;
  case 5:
    syscall(__NR_lseek, r[0], 0, 1);
    break;
  case 6:
    memcpy((void*)0x20000500, "./file0", 8);
    res = syscall(__NR_open, 0x20000500, 2, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 7:
    memcpy((void*)0x20000300,
           "\xd8\x8a\x8d\x38\x14\x4e\x50\x13\xd4\x73\xc0\xac\x2c\xa6\x1f\xf3"
           "\xb7\x49\xa4\xf5\xc7\xe6\xe9\xc2\xce\x58\x6e\x5c\xfc\xa5\xd6\x0f"
           "\xfc\x9a\x4d\xf7\x18\x56\x92\x5b\x30\x0a\xb3\x9b\x1d\xd5\x92\x38"
           "\x58\x21\xfa\xec\xb0\x39\xbc\xdc\x47\x5f\xfb\xac\xb9\x82\x18\x70"
           "\x73\xfc\x47\x9f\x1c\xc6\xff\xa0\x00\x0a\xf0\x02\x6e\x75\x92\x1d"
           "\x8a\x83\x10\x07\x1e\xc2\x8e\x0e\x62\x92\x68\x07\x55\xe4\x70\xaa"
           "\x73",
           97);
    syscall(__NR_write, r[2], 0x20000300, 0x61);
    break;
  case 8:
    *(uint64_t*)0x20000040 = 0;
    syscall(__NR_sendfile, r[2], r[2], 0x20000040, 0x7527fb3200000000);
    break;
  }
}

void loop()
{
  execute(9);
  collide = 1;
  execute(9);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  loop();
  return 0;
}