// https://syzkaller.appspot.com/bug?id=695e56989a39369134b51e9d4036acb65f09a08f
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdarg.h>
#include <stdbool.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 <time.h>
#include <unistd.h>

#include <linux/futex.h>

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;
}

static void thread_start(void* (*fn)(void*), void* arg)
{
  pthread_t th;
  pthread_attr_t attr;
  pthread_attr_init(&attr);
  pthread_attr_setstacksize(&attr, 128 << 10);
  if (pthread_create(&th, &attr, fn, arg))
    exit(1);
  pthread_attr_destroy(&attr);
}

typedef struct {
  int state;
} event_t;

static void event_init(event_t* ev)
{
  ev->state = 0;
}

static void event_reset(event_t* ev)
{
  ev->state = 0;
}

static void event_set(event_t* ev)
{
  if (ev->state)
    exit(1);
  __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
  syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG);
}

static void event_wait(event_t* ev)
{
  while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
  return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
  uint64_t start = current_time_ms();
  uint64_t now = start;
  for (;;) {
    uint64_t remain = timeout - (now - start);
    struct timespec ts;
    ts.tv_sec = remain / 1000;
    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
    syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
    if (__atomic_load_n(&ev->state, __ATOMIC_RELAXED))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static int inject_fault(int nth)
{
  int fd;
  char buf[16];
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  sprintf(buf, "%d", nth + 1);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

struct thread_t {
  int created, call;
  event_t ready, done;
};

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

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    event_wait(&th->ready);
    event_reset(&th->ready);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    event_set(&th->done);
  }
  return 0;
}

static void loop(void)
{
  int i, call, thread;
  for (call = 0; call < 9; call++) {
    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
         thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        event_init(&th->ready);
        event_init(&th->done);
        event_set(&th->done);
        thread_start(thr, th);
      }
      if (!event_isset(&th->done))
        continue;
      event_reset(&th->done);
      th->call = call;
      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
      event_set(&th->ready);
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    syscall(__NR_gettid);
    break;
  case 1:
    *(uint64_t*)0x20044000 = 0;
    *(uint32_t*)0x20044008 = 0x12;
    *(uint32_t*)0x2004400c = 0;
    *(uint32_t*)0x20044010 = 0;
    syscall(__NR_timer_create, 0, 0x20044000, 0x20044000);
    break;
  case 2:
    res = syscall(__NR_socket, 0xa, 1, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 3:
    *(uint32_t*)0x200000c0 = 1;
    syscall(__NR_setsockopt, r[0], 6, 0x13, 0x200000c0, 0x1d4);
    break;
  case 4:
    *(uint16_t*)0x20000080 = 0xa;
    *(uint16_t*)0x20000082 = htobe16(0);
    *(uint32_t*)0x20000084 = 0;
    *(uint8_t*)0x20000088 = 0;
    *(uint8_t*)0x20000089 = 0;
    *(uint8_t*)0x2000008a = 0;
    *(uint8_t*)0x2000008b = 0;
    *(uint8_t*)0x2000008c = 0;
    *(uint8_t*)0x2000008d = 0;
    *(uint8_t*)0x2000008e = 0;
    *(uint8_t*)0x2000008f = 0;
    *(uint8_t*)0x20000090 = 0;
    *(uint8_t*)0x20000091 = 0;
    *(uint8_t*)0x20000092 = 0;
    *(uint8_t*)0x20000093 = 0;
    *(uint8_t*)0x20000094 = 0;
    *(uint8_t*)0x20000095 = 0;
    *(uint8_t*)0x20000096 = 0;
    *(uint8_t*)0x20000097 = 0;
    *(uint32_t*)0x20000098 = 0;
    syscall(__NR_connect, r[0], 0x20000080, 0x1c);
    break;
  case 5:
    *(uint64_t*)0x20002440 = 0x20001640;
    *(uint32_t*)0x20002448 = 0x80;
    *(uint64_t*)0x20002450 = 0x20001b80;
    *(uint64_t*)0x20001b80 = 0x20001840;
    *(uint64_t*)0x20001b88 = 0xc7;
    *(uint64_t*)0x20001b90 = 0x20000180;
    *(uint64_t*)0x20001b98 = 0x4f;
    *(uint64_t*)0x20001ba0 = 0x200019c0;
    *(uint64_t*)0x20001ba8 = 0x7f;
    *(uint64_t*)0x20001bb0 = 0x20001a40;
    *(uint64_t*)0x20001bb8 = 0x36;
    *(uint64_t*)0x20001bc0 = 0x20001a80;
    *(uint64_t*)0x20001bc8 = 0xe4;
    *(uint64_t*)0x20002458 = 5;
    *(uint64_t*)0x20002460 = 0x20001c00;
    *(uint64_t*)0x20002468 = 0xbb;
    *(uint32_t*)0x20002470 = 0;
    *(uint32_t*)0x20002478 = 0;
    *(uint64_t*)0x20002480 = 0x20001e40;
    *(uint32_t*)0x20002488 = 0xffffff26;
    *(uint64_t*)0x20002490 = 0x20002300;
    *(uint64_t*)0x20002300 = 0x20001f80;
    *(uint64_t*)0x20002308 = 0xe5;
    *(uint64_t*)0x20002310 = 0x20002080;
    *(uint64_t*)0x20002318 = 0x1b;
    *(uint64_t*)0x20002320 = 0x200020c0;
    *(uint64_t*)0x20002328 = 4;
    *(uint64_t*)0x20002330 = 0x20002100;
    *(uint64_t*)0x20002338 = 0xf1;
    *(uint64_t*)0x20002340 = 0x20002200;
    *(uint64_t*)0x20002348 = 0xd0;
    *(uint64_t*)0x20002498 = 5;
    *(uint64_t*)0x200024a0 = 0x20002380;
    *(uint64_t*)0x200024a8 = 0xbd;
    *(uint32_t*)0x200024b0 = 0;
    *(uint32_t*)0x200024b8 = 0;
    *(uint64_t*)0x20002500 = 0;
    *(uint64_t*)0x20002508 = 0;
    syscall(__NR_recvmmsg, -1, 0x20002440, 2, 0, 0x20002500);
    break;
  case 6:
    memcpy((void*)0x20006580, "tls", 4);
    syscall(__NR_setsockopt, r[0], 6, 0x1f, 0x20006580, 0x95d59845436eab44);
    break;
  case 7:
    *(uint16_t*)0x20000100 = 0x303;
    *(uint16_t*)0x20000102 = 0x33;
    syscall(__NR_setsockopt, r[0], 0x11a, 1, 0x20000100, 0x28);
    break;
  case 8:
    *(uint64_t*)0x20005f00 = 0x20004980;
    *(uint16_t*)0x20004980 = 3;
    memcpy((void*)0x20004982, "\x55\xf3\xe6\x4e\x65\xaf\xb6", 7);
    *(uint32_t*)0x2000498c = 0;
    *(uint32_t*)0x20005f08 = 0x80;
    *(uint64_t*)0x20005f10 = 0x20001700;
    *(uint64_t*)0x20005f18 = 0x12e;
    *(uint64_t*)0x20005f20 = 0x200017c0;
    *(uint64_t*)0x20005f28 = 0;
    *(uint32_t*)0x20005f30 = 0;
    *(uint32_t*)0x20005f38 = 0;
    write_file("/sys/kernel/debug/failslab/ignore-gfp-wait", "N");
    write_file("/sys/kernel/debug/fail_futex/ignore-private", "N");
    inject_fault(4);
    syscall(__NR_sendmmsg, r[0], 0x20005f00, 1, 0);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  loop();
  return 0;
}