// https://syzkaller.appspot.com/bug?id=00aa2c9aba775f0761d3dabd7fb176964685051a
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.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);
  if (pthread_create(&th, &attr, fn, arg))
    exit(1);
  pthread_attr_destroy(&attr);
}

#define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1)

#define BITMASK_LEN_OFF(type, bf_off, bf_len)                                  \
  (type)(BITMASK_LEN(type, (bf_len)) << (bf_off))

#define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len)                      \
  if ((bf_off) == 0 && (bf_len) == 0) {                                        \
    *(type*)(addr) = (type)(val);                                              \
  } else {                                                                     \
    type new_val = *(type*)(addr);                                             \
    new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len));                     \
    new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off);          \
    *(type*)(addr) = new_val;                                                  \
  }

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 long syz_open_dev(long a0, long a1, 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;
  int collide = 0;
again:
  for (call = 0; call < 19; 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);
      if (collide && (call % 2) == 0)
        break;
      event_timedwait(&th->done, 45);
      break;
    }
  }
  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
    sleep_ms(1);
  if (!collide) {
    collide = 1;
    goto again;
  }
}

#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif

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

void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    memcpy((void*)0x200000c0, "/dev/bus/usb/00#/00#", 21);
    res = syz_open_dev(0x200000c0, 0x80000000007, 1);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint32_t*)0x20000000 = 0xa3;
    *(uint32_t*)0x20000004 = 0x6c;
    *(uint32_t*)0x20000008 = 0;
    *(uint32_t*)0x2000000c = 0;
    *(uint32_t*)0x20000010 = 0;
    *(uint64_t*)0x20000018 = 0;
    syscall(__NR_ioctl, r[0], 0xc0185500, 0x20000000);
    break;
  case 2:
    *(uint32_t*)0x20d4effc = 1;
    syscall(__NR_setsockopt, -1, 1, 0x3c, 0x20d4effc, 4);
    break;
  case 3:
    memcpy((void*)0x200001c0,
           "\x76\x63\x61\x6e\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
           16);
    syscall(__NR_setsockopt, -1, 1, 0x19, 0x200001c0, 0x10);
    break;
  case 4:
    *(uint64_t*)0x20000080 = 0;
    *(uint64_t*)0x20000088 = 0x4004400;
    syscall(__NR_ioctl, -1, 0x127f, 0x20000080);
    break;
  case 5:
    memcpy((void*)0x20000040, "cpu.stat", 9);
    syscall(__NR_openat, -1, 0x20000040, 0, 0);
    break;
  case 6:
    *(uint32_t*)0x20000180 = 0;
    *(uint16_t*)0x20000184 = 0x18;
    *(uint16_t*)0x20000186 = 0xfa00;
    *(uint64_t*)0x20000188 = 1;
    *(uint64_t*)0x20000190 = 0x20000140;
    *(uint16_t*)0x20000198 = 2;
    *(uint8_t*)0x2000019a = 0xf;
    *(uint8_t*)0x2000019b = 0;
    *(uint8_t*)0x2000019c = 0;
    *(uint8_t*)0x2000019d = 0;
    *(uint8_t*)0x2000019e = 0;
    *(uint8_t*)0x2000019f = 0;
    syscall(__NR_write, 0xffffff9c, 0x20000180, 0x20);
    break;
  case 7:
    *(uint16_t*)0x20000000 = 2;
    *(uint16_t*)0x20000002 = htobe16(0x4e20);
    *(uint8_t*)0x20000004 = 0xac;
    *(uint8_t*)0x20000005 = 0x14;
    *(uint8_t*)0x20000006 = 0x14;
    *(uint8_t*)0x20000007 = 0x18;
    *(uint8_t*)0x20000008 = 0;
    *(uint8_t*)0x20000009 = 0;
    *(uint8_t*)0x2000000a = 0;
    *(uint8_t*)0x2000000b = 0;
    *(uint8_t*)0x2000000c = 0;
    *(uint8_t*)0x2000000d = 0;
    *(uint8_t*)0x2000000e = 0;
    *(uint8_t*)0x2000000f = 0;
    syscall(__NR_connect, -1, 0x20000000, 0x10);
    break;
  case 8:
    *(uint64_t*)0x20000dc0 = 0x200004c0;
    *(uint16_t*)0x200004c0 = 0x18;
    *(uint32_t*)0x200004c2 = 0;
    *(uint16_t*)0x200004c6 = 3;
    *(uint8_t*)0x200004c8 = 0xaa;
    *(uint8_t*)0x200004c9 = 0xaa;
    *(uint8_t*)0x200004ca = 0xaa;
    *(uint8_t*)0x200004cb = 0xaa;
    *(uint8_t*)0x200004cc = 0xaa;
    *(uint8_t*)0x200004cd = 0xaa;
    memcpy((void*)0x200004ce,
           "\x79\x61\x6d\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
           16);
    *(uint32_t*)0x20000dc8 = 0x80;
    *(uint64_t*)0x20000dd0 = 0x200007c0;
    *(uint64_t*)0x200007c0 = 0x20000700;
    *(uint64_t*)0x200007c8 = 0;
    *(uint64_t*)0x20000dd8 = 1;
    *(uint64_t*)0x20000de0 = 0x20000e00;
    *(uint64_t*)0x20000de8 = 0;
    *(uint32_t*)0x20000df0 = 0x840;
    syscall(__NR_sendmsg, -1, 0x20000dc0, 0x80);
    break;
  case 9:
    memcpy((void*)0x20000300, "/dev/loop#", 11);
    res = syz_open_dev(0x20000300, 0x252, 0x82);
    if (res != -1)
      r[1] = res;
    break;
  case 10:
    *(uint32_t*)0x20000880 = 0;
    syscall(__NR_ioctl, -1, 0x800442d4, 0x20000880);
    break;
  case 11:
    syscall(__NR_ioctl, r[1], 0x4c00, -1);
    break;
  case 12:
    *(uint32_t*)0x20000800 = 0;
    *(uint32_t*)0x20000804 = 0x400;
    *(uint32_t*)0x20000808 = 3;
    *(uint32_t*)0x2000080c = 4;
    syscall(__NR_setsockopt, -1, 0x84, 0, 0x20000800, 0x10);
    break;
  case 13:
    syscall(__NR_write, -1, 0x20000100, 0);
    break;
  case 14:
    memcpy((void*)0x20000280, "cpuacct.usage_user", 19);
    res = syscall(__NR_openat, 0xffffff9c, 0x20000280, 0, 0);
    if (res != -1)
      r[2] = res;
    break;
  case 15:
    syscall(__NR_write, r[2], 0x200008c0, 0);
    break;
  case 16:
    *(uint32_t*)0x20000040 = 1;
    *(uint32_t*)0x20000044 = 0x70;
    *(uint8_t*)0x20000048 = 0;
    *(uint8_t*)0x20000049 = 0;
    *(uint8_t*)0x2000004a = 0;
    *(uint8_t*)0x2000004b = 0;
    *(uint32_t*)0x2000004c = 0;
    *(uint64_t*)0x20000050 = 0x50d;
    *(uint64_t*)0x20000058 = 0;
    *(uint64_t*)0x20000060 = 0;
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 0, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 1, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 2, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 3, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 4, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0xffff, 5, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 6, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 7, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 8, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 9, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 10, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 11, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 12, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 13, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 14, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 15, 2);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 17, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 18, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 19, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 20, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 21, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 22, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 23, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 24, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 25, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 26, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 27, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 28, 1);
    STORE_BY_BITMASK(uint64_t, 0x20000068, 0, 29, 35);
    *(uint32_t*)0x20000070 = 0;
    *(uint32_t*)0x20000074 = 0;
    *(uint64_t*)0x20000078 = 0x20000000;
    *(uint64_t*)0x20000080 = 0;
    *(uint64_t*)0x20000088 = 0;
    *(uint64_t*)0x20000090 = 0;
    *(uint32_t*)0x20000098 = 0;
    *(uint32_t*)0x2000009c = 0;
    *(uint64_t*)0x200000a0 = 0;
    *(uint32_t*)0x200000a8 = 0;
    *(uint16_t*)0x200000ac = 0;
    *(uint16_t*)0x200000ae = 0;
    syscall(__NR_perf_event_open, 0x20000040, 0, -1, -1, 0);
    break;
  case 17:
    memcpy((void*)0x20000380,
           "\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x76"
           "\x8e\x05\xf7\xc1\x55\xad\x7d\xc6\x94\x7c\x57\x3e\x5a\x69\x24\x4e"
           "\x76\x38\x2c\x0a\xa6\x3d\x57\x5e\xa3\x59\x7f\x8b\x17\x28\x27\x7e"
           "\xf7\x6b\x30\x54\x4d\x7b\xa9\x2d\xcf\x97\x8f\x1f\x81\xdc\x1b\x7f"
           "\x8f\x7b\x34\x51\xda\xda\x02\xec\xb4\xf1\xdd\xcc\x8b\x52\x41\xda"
           "\x89\x45\x66\x6e\x00\x73\xc2\x5a\x62\x01\x00\x4d\xbe\xa3\x7a\xab"
           "\xd3\xeb\x98\x88\xc4\xc6\x29\x41\x9f\x50\x93\x7a\x68\x48\xe0\xd2"
           "\x81\xe4\xee\x56\x8c\x4d\xe9\xa0\x36\xc2\x6f\x19\x22\xf6\x49\x71"
           "\xd4\xdf\x97\xfb\xab\x04\xe8\xce\x49\x38\xb3\x1d\xcf\x25\x9b\x4b"
           "\xc6\x09\x01\xe1\x86\x61\xfa\xb8\xfb\x29\x88\xcd\x2b\xc2\x60\xc2"
           "\xf5\x72\x35\x3e\x6b\xb0\xa0\x02\xfc\x16\x4d\x4f\x18\x9b\x06\x80"
           "\x62\xd1\x01\x00\x00\x00\x00\x00\x00\x00\x40\x0c\x0c\x4c\xa5\x7b"
           "\x54\x6b\x94\x30\x17\x2e\xa5\x36\x2e\xe0\x14\x1b\x3d\xf0\x6a\xd2"
           "\x35\xe8\x15\xd8\x9e\xea\xd3\xd9\x47\x34\x09\xc0\x9c\x2e\x27\xa9"
           "\x52\x33\x7a\x24\xf2\x01\x88\xc0\x13\x12\x3c\xc0\x31\x6a\x33\xd8"
           "\xb4\x43\x45\x37\x73\xe4\xa0\x9e\xdd\x80\x31\x12\x4d\xee\x13\xce"
           "\x9c\x75\x28\x8f\x2e\xc8\x33\xc7\xe6\x6a\xf5\xb1\x9a\x00\x00\x00"
           "\x00\x00\x00\x00",
           276);
    syscall(__NR_memfd_create, 0x20000380, 0);
    break;
  case 18:
    syscall(__NR_keyctl, 0xd, 0, 0xe0, 0);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  loop();
  return 0;
}