// https://syzkaller.appspot.com/bug?id=ca73228d70ce8bdc08a253f931708a15f2e777e1
// 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>

static void test();

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

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[5] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff};
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    memcpy((void*)0x20000100, "/dev/ppp", 9);
    syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 1, 0);
    break;
  case 1:
    res = syscall(__NR_socket, 0x18, 1, 1);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    *(uint16_t*)0x20e71000 = 0x18;
    *(uint32_t*)0x20e71002 = 1;
    *(uint32_t*)0x20e71006 = 0;
    *(uint32_t*)0x20e7100a = -1;
    *(uint16_t*)0x20e7100e = 2;
    *(uint16_t*)0x20e71010 = 0;
    *(uint16_t*)0x20e71012 = 0;
    *(uint16_t*)0x20e71014 = 0;
    *(uint16_t*)0x20e71016 = 0xa;
    *(uint16_t*)0x20e71018 = htobe16(0x4e20);
    *(uint32_t*)0x20e7101a = 0;
    *(uint8_t*)0x20e7101e = -1;
    *(uint8_t*)0x20e7101f = 1;
    *(uint8_t*)0x20e71020 = 0;
    *(uint8_t*)0x20e71021 = 0;
    *(uint8_t*)0x20e71022 = 0;
    *(uint8_t*)0x20e71023 = 0;
    *(uint8_t*)0x20e71024 = 0;
    *(uint8_t*)0x20e71025 = 0;
    *(uint8_t*)0x20e71026 = 0;
    *(uint8_t*)0x20e71027 = 0;
    *(uint8_t*)0x20e71028 = 0;
    *(uint8_t*)0x20e71029 = 0;
    *(uint8_t*)0x20e7102a = 0;
    *(uint8_t*)0x20e7102b = 0;
    *(uint8_t*)0x20e7102c = 0;
    *(uint8_t*)0x20e7102d = 1;
    *(uint32_t*)0x20e7102e = 0;
    syscall(__NR_connect, r[0], 0x20e71000, 0x32);
    break;
  case 3:
    res = syscall(__NR_ioctl, r[0], 0x8904, 0x20000080);
    if (res != -1)
      r[1] = *(uint32_t*)0x20000080;
    break;
  case 4:
    syscall(__NR_ioprio_set, 3, r[1], 6);
    break;
  case 5:
    syscall(__NR_socket, 0xa, 0x80000, 5);
    break;
  case 6:
    memcpy((void*)0x20000000, "/selinux/mls", 13);
    syscall(__NR_openat, 0xffffffffffffff9c, 0x20000000, 0, 0);
    break;
  case 7:
    res = syscall(__NR_socket, 0xa, 2, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 8:
    res = syscall(__NR_socket, 0x18, 1, 1);
    if (res != -1)
      r[3] = res;
    break;
  case 9:
    *(uint16_t*)0x20e71000 = 0x18;
    *(uint32_t*)0x20e71002 = 1;
    *(uint32_t*)0x20e71006 = 0;
    *(uint32_t*)0x20e7100a = r[2];
    *(uint16_t*)0x20e7100e = 3;
    *(uint16_t*)0x20e71010 = 0;
    *(uint16_t*)0x20e71012 = 2;
    *(uint16_t*)0x20e71014 = 0;
    *(uint16_t*)0x20e71016 = 0xa;
    *(uint16_t*)0x20e71018 = htobe16(0x4e21);
    *(uint32_t*)0x20e7101a = 3;
    *(uint8_t*)0x20e7101e = -1;
    *(uint8_t*)0x20e7101f = 1;
    *(uint8_t*)0x20e71020 = 0;
    *(uint8_t*)0x20e71021 = 0;
    *(uint8_t*)0x20e71022 = 0;
    *(uint8_t*)0x20e71023 = 0;
    *(uint8_t*)0x20e71024 = 0;
    *(uint8_t*)0x20e71025 = 0;
    *(uint8_t*)0x20e71026 = 0;
    *(uint8_t*)0x20e71027 = 0;
    *(uint8_t*)0x20e71028 = 0;
    *(uint8_t*)0x20e71029 = 0;
    *(uint8_t*)0x20e7102a = 0;
    *(uint8_t*)0x20e7102b = 0;
    *(uint8_t*)0x20e7102c = 0;
    *(uint8_t*)0x20e7102d = 1;
    *(uint32_t*)0x20e7102e = 4;
    syscall(__NR_connect, r[3], 0x20e71000, 0x32);
    break;
  case 10:
    res = syscall(__NR_socket, 0x18, 1, 1);
    if (res != -1)
      r[4] = res;
    break;
  case 11:
    syscall(__NR_close, r[3]);
    break;
  case 12:
    syscall(__NR_dup2, r[4], r[2]);
    break;
  }
}

void test()
{
  execute(13);
  collide = 1;
  execute(13);
}

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