// https://syzkaller.appspot.com/bug?id=5a34035b13d7f4215357b46093ca6d5c45c93f93
// 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/mount.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 {
    unsigned long nb = a1;
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(nb % 10);
      nb /= 10;
    }
    return open(buf, a2 & ~O_CREAT, 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)
{
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  int i, call, thread;
  for (call = 0; call < 4; 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[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_call(int call)
{
  intptr_t res = 0;
  switch (call) {
  case 0:
    //  syz_open_dev$loop arguments: [
    //    dev: ptr[in, buffer] {
    //      buffer: {2f 64 65 76 2f 6c 6f 6f 70 23 00} (length 0xb)
    //    }
    //    id: intptr = 0x195d (8 bytes)
    //    flags: open_flags = 0xec4d2770249a3ef5 (8 bytes)
    //  ]
    //  returns fd_loop
    memcpy((void*)0x200000000240, "/dev/loop#\000", 11);
    res = -1;
    res = syz_open_dev(
        /*dev=*/0x200000000240, /*id=*/0x195d,
        /*flags=O_TRUNC|O_SYNC|O_NONBLOCK|O_NOFOLLOW|O_EXCL|O_CREAT|0xec4d277024882435*/
        0xec4d2770249a3ef5);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    //  openat$sysfs arguments: [
    //    fd: const = 0xffffffffffffff9c (8 bytes)
    //    dir: ptr[in, buffer] {
    //      buffer: {2f 73 79 73 2f 70 6f 77 65 72 2f 70 6d 5f 66 72 65 65 7a 65
    //      5f 74 69 6d 65 6f 75 74} (length 0x1c)
    //    }
    //    flags: open_flags = 0x82803 (4 bytes)
    //    mode: open_mode = 0x8e (2 bytes)
    //  ]
    //  returns fd
    memcpy((void*)0x200000000000, "/sys/power/pm_freeze_timeout", 28);
    res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul,
                  /*dir=*/0x200000000000ul,
                  /*flags=O_NONBLOCK|O_CLOEXEC|FASYNC|O_RDWR|0x1*/ 0x82803,
                  /*mode=S_IWOTH|S_IROTH|S_IXGRP|S_IWUSR*/ 0x8e);
    if (res != -1)
      r[1] = res;
    break;
  case 2:
    //  ioctl$LOOP_CONFIGURE arguments: [
    //    fd: fd_loop (resource)
    //    cmd: const = 0x4c0a (4 bytes)
    //    arg: ptr[in, loop_config] {
    //      loop_config {
    //        fd: fd_loop (resource)
    //        block_size: int32 = 0x0 (4 bytes)
    //        info: loop_info64 {
    //          lo_device: const = 0x0 (8 bytes)
    //          lo_inode: const = 0x0 (8 bytes)
    //          lo_rdevice: const = 0x0 (8 bytes)
    //          lo_offset: int64 = 0x6 (8 bytes)
    //          lo_sizelimit: int64 = 0x4000000000000ffd (8 bytes)
    //          lo_number: const = 0x0 (4 bytes)
    //          lo_enc_type: lo_encrypt_type = 0x0 (4 bytes)
    //          lo_enc_key_size: int32 = 0x1d (4 bytes)
    //          lo_flags: lo_flags = 0xc (4 bytes)
    //          lo_file_name: buffer: {fa f9 83 17 e5 a1 14 99 89 fc 8d be 43 ea
    //          6a cc 96 e3 a2 50 3d c3 bd 3f e3 7d 58 12 8b ba d0 09 9c eb dc
    //          25 f5 d6 90 98 c8 b5 34 46 4c 51 6b dd 8a 0f 35 00 00 e3 5a bd
    //          b8 0e 38 f5 eb 01 00 01} (length 0x40) lo_crypt_name: buffer:
    //          {32 d8 cc 26 3d 9e 23 4b 30 c5 09 97 d3 be f4 cd 4a 5d 83 cd d3
    //          df e7 80 0b 2d 7b 6a a5 4c c5 00 1f ca ed 1e 83 1f a7 9a 00 00
    //          00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //          00} (length 0x40) lo_enc_key: buffer: {67 52 37 60 fd 40 f7 8d
    //          2c fc 03 d8 1a 8c a5 5b a1 39 c0 18 02 c4 da e4 16 2e 43 ac 61
    //          b7 ad 33} (length 0x20) lo_init: array[int64] {
    //            int64 = 0x8 (8 bytes)
    //            int64 = 0x5 (8 bytes)
    //          }
    //        }
    //        reserved: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    //        00 00 00 00} (length 0x40)
    //      }
    //    }
    //  ]
    *(uint32_t*)0x200000000080 = r[1];
    *(uint32_t*)0x200000000084 = 0;
    *(uint64_t*)0x200000000088 = 0;
    *(uint64_t*)0x200000000090 = 0;
    *(uint64_t*)0x200000000098 = 0;
    *(uint64_t*)0x2000000000a0 = 6;
    *(uint64_t*)0x2000000000a8 = 0x4000000000000ffd;
    *(uint32_t*)0x2000000000b0 = 0;
    *(uint32_t*)0x2000000000b4 = 0;
    *(uint32_t*)0x2000000000b8 = 0x1d;
    *(uint32_t*)0x2000000000bc = 0xc;
    memcpy((void*)0x2000000000c0,
           "\xfa\xf9\x83\x17\xe5\xa1\x14\x99\x89\xfc\x8d\xbe\x43\xea\x6a\xcc"
           "\x96\xe3\xa2\x50\x3d\xc3\xbd\x3f\xe3\x7d\x58\x12\x8b\xba\xd0\x09"
           "\x9c\xeb\xdc\x25\xf5\xd6\x90\x98\xc8\xb5\x34\x46\x4c\x51\x6b\xdd"
           "\x8a\x0f\x35\x00\x00\xe3\x5a\xbd\xb8\x0e\x38\xf5\xeb\x01\x00\x01",
           64);
    memcpy((void*)0x200000000100,
           "\x32\xd8\xcc\x26\x3d\x9e\x23\x4b\x30\xc5\x09\x97\xd3\xbe\xf4\xcd"
           "\x4a\x5d\x83\xcd\xd3\xdf\xe7\x80\x0b\x2d\x7b\x6a\xa5\x4c\xc5\x00"
           "\x1f\xca\xed\x1e\x83\x1f\xa7\x9a\x00\x00\x00\x02\x00\x00\x00\x00"
           "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
           64);
    memcpy((void*)0x200000000140,
           "\x67\x52\x37\x60\xfd\x40\xf7\x8d\x2c\xfc\x03\xd8\x1a\x8c\xa5\x5b"
           "\xa1\x39\xc0\x18\x02\xc4\xda\xe4\x16\x2e\x43\xac\x61\xb7\xad\x33",
           32);
    *(uint64_t*)0x200000000160 = 8;
    *(uint64_t*)0x200000000168 = 5;
    memset((void*)0x200000000170, 0, 64);
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x4c0a, /*arg=*/0x200000000080ul);
    break;
  case 3:
    //  ioctl$LOOP_CHANGE_FD arguments: [
    //    fd: fd_loop (resource)
    //    cmd: const = 0x4c06 (4 bytes)
    //    arg: fd (resource)
    //  ]
    syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x4c06, /*arg=*/r[1]);
    break;
  }
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}