// https://syzkaller.appspot.com/bug?id=2c2730c5bfc930926519b6ca5edd1c5052e84418
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.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);
  int i = 0;
  for (; i < 100; i++) {
    if (pthread_create(&th, &attr, fn, arg) == 0) {
      pthread_attr_destroy(&attr);
      return;
    }
    if (errno == EAGAIN) {
      usleep(50);
      continue;
    }
    break;
  }
  exit(1);
}

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, 1000000);
}

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_ACQUIRE))
      return 1;
    now = current_time_ms();
    if (now - start > timeout)
      return 0;
  }
}

static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

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 < 10; 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, 50);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    res = syscall(__NR_socket, /*domain=*/0xaul, /*type=*/1ul, /*proto=*/0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint16_t*)0x20000000 = 0xa;
    *(uint16_t*)0x20000002 = htobe16(2);
    *(uint32_t*)0x20000004 = htobe32(0);
    memset((void*)0x20000008, 0, 16);
    *(uint32_t*)0x20000018 = 0;
    syscall(__NR_bind, /*fd=*/r[0], /*addr=*/0x20000000ul, /*addrlen=*/0x1cul);
    break;
  case 2:
    *(uint16_t*)0x20b63fe4 = 0xa;
    *(uint16_t*)0x20b63fe6 = htobe16(2);
    *(uint32_t*)0x20b63fe8 = htobe32(0);
    *(uint64_t*)0x20b63fec = htobe64(0);
    *(uint64_t*)0x20b63ff4 = htobe64(1);
    *(uint32_t*)0x20b63ffc = 0;
    syscall(__NR_sendto, /*fd=*/r[0], /*buf=*/0ul, /*len=*/0x1eul,
            /*f=*/0x2200c851ul, /*addr=*/0x20b63fe4ul, /*addrlen=*/0x1cul);
    break;
  case 3:
    syscall(__NR_fcntl, /*fd=*/r[0], /*cmd=*/8ul, /*pid=*/-1);
    break;
  case 4:
    memcpy(
        (void*)0x20000080,
        "\x44\xf9\xb1\x08\xb1\xcd\xc8\x85\xc9\xc5\x33\xd2\x1f\x47\x4b\xec\x8b"
        "\xfe\xf1\xdf\x1e\x2d\xa7\x1e\x57\x8d\xc6\xb9\x1d\x09\xf7\xab\x15\x37"
        "\x85\x71\xd8\xe2\x75\x46\x09\x00\x11\x00\x6e\x75\x43\x69\x14\xab\x71"
        "\x75\x28\xee\x4b\x7a\x9b\xea\xf9\x08\xd1\x11\x37\xc1\x19\x03\x06\x4e"
        "\x83\xb4\x95\x1f\x4d\x43\x3a\x54\x04\x97\x0c\x85\xd9\x2d\x70\x83\xfd"
        "\x38\x84\x4c\xbb\x0c\x6c\x5e\xb5\x08\xdd\xc2\xdc\x7a\x59\x0a\xa7\x94"
        "\x1b\x1e\x9e\xeb\x5a\x68\x81\x38\xde\xa0\x9b\x77\x6c\xbf\xa7\x84\xcb"
        "\xf5\x50\xbf\x30\x74\xfb\x0d\x77\x5d\xa4\xdf\x5a\x3f\x48\xbb\xdf\x45"
        "\x2e\xeb\x6b\x92\x3d\xa9\xd0\xe2\x5b\x80\xf7\x6a\x87\x36\x64\xb5\x75"
        "\x34\x44\xfe\x05\xf3\x3e\x5f\x91\x04\x55\x40\x83\x6c\x3c\xd6\xaf\x10"
        "\xf0\xcd\x01\x8f\x0c\x6f\x57\xf9\x26\xac\x95\x9a\x56\x28\xc4\x50\x88"
        "\xfb\xe0\xc8\x7f\xbe\x6c\xbc\xda\x46\x62\xd2\xa1\x2f\x6d\x00\x00\x00"
        "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
        215);
    syscall(__NR_sendto, /*fd=*/r[0], /*buf=*/0x20000080ul,
            /*len=*/0xd0d0c2acul, /*f=*/1ul, /*addr=*/0ul, /*addrlen=*/0ul);
    break;
  case 5:
    *(uint16_t*)0x20001080 = 0;
    *(uint16_t*)0x20001082 = 0;
    *(uint16_t*)0x20001084 = 0;
    *(uint16_t*)0x20001086 = 0;
    *(uint16_t*)0x20001088 = 1;
    *(uint16_t*)0x2000108a = 0x74;
    *(uint16_t*)0x2000108c = 2;
    *(uint16_t*)0x20001090 = 0;
    *(uint16_t*)0x20001092 = 0;
    *(uint16_t*)0x20001094 = 0;
    *(uint16_t*)0x20001096 = 0;
    *(uint16_t*)0x20001098 = 0;
    *(uint16_t*)0x2000109a = 0;
    syscall(__NR_ioctl, /*fd=*/-1, /*cmd=*/0x40304580, /*arg=*/0x20001080ul);
    break;
  case 6:
    memcpy((void*)0x200000c0, "/dev/input/event#\000", 18);
    res = -1;
    res = syz_open_dev(/*dev=*/0x200000c0, /*id=*/0, /*flags=*/0x822b01);
    if (res != -1)
      r[1] = res;
    break;
  case 7:
    memcpy((void*)0x200013c0, "/dev/input/event#\000", 18);
    res = -1;
    res = syz_open_dev(/*dev=*/0x200013c0, /*id=*/0, /*flags=*/0);
    if (res != -1)
      r[2] = res;
    break;
  case 8:
    syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x5452, /*arg=*/0x20000000ul);
    break;
  case 9:
    memset((void*)0x20000040, 226, 1);
    syscall(__NR_write, /*fd=*/r[1], /*buf=*/0x20000040ul, /*count=*/0x2ad8ul);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul);
  loop();
  return 0;
}