// https://syzkaller.appspot.com/bug?id=3c1f47967b7cbd399d3ba3e65f297a29aa1c5f92
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <fcntl.h>
#include <linux/futex.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>

static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t 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));
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

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 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);
        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;
      }
    }
  }
}

#ifndef __NR_mmap
#define __NR_mmap 192
#endif
#ifndef __NR_write
#define __NR_write 4
#endif
#ifndef __NR_read
#define __NR_read 3
#endif
#undef __NR_mmap
#define __NR_mmap __NR_mmap2

long r[1];
uint64_t procid;
void execute_call(int call)
{
  switch (call) {
  case 0:
    syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0);
    break;
  case 1:
    memcpy((void*)0x20005000, "/dev/sg#", 9);
    r[0] = syz_open_dev(0x20005000, 0, 0x8002);
    break;
  case 2:
    memcpy((void*)0x205c7f24,
           "\x61\x2e\x78\xba\x3b\x60\x81\x6f\x46\x44\x28\xce\x64\x7e\xad\xa7"
           "\xf3\x8b\xc4\x71\x87\x45\xae\xf5\x50\xfb\xe8\x2c\xae\x86\xf2\x6f"
           "\x6c\x9f\x92\x26\x46\xfd\xf1\x9f\xbd\x83\x44\xb5\x19\xa4\x2b\x6c"
           "\xe5\xe4\x15\x23\x6a\x97\xde\x15\x0d\x38\xa7\x99\xfb\x05\x35\x89"
           "\xf4\xe4\xd0\xeb\x69\x60\x9f\x01\x84\x78\x67\xdd\xbc\x61\x32\x13"
           "\x5b\xa6\xac\xd1\xc4\xd3\x35\xf8\x7c\x28\x0c\xce\x2d\x35\x7a\x55"
           "\x99\x7a\xea\x83\xf3\xe7\x8c\xb1\x2f\x72\x12\xa1\x01\x7f\xe5\x88"
           "\xef\xb9\x75\x61\x1e\xdc\xf3\x73\xfd\xdf\x21\x48\x9b\x26\xca\x9f"
           "\x8f\xdc\x42\xcb\x61\xa5\xf9\x76\xe3\x86\x1d\xe9\x05\x08\x02\x8c"
           "\x26\x99\x4a\x4c\xe2\x36\xda\xd5\x21\xc6\x4c\xdd\xbb\xeb\x9b\xce"
           "\xa2\x28\xb9\xff\xa6\xb8\x32\x29\x1c\xc3\x66\x3b\x27\x65\x0d\x0b"
           "\xd5\xf4\xb0\x17\x95\xc8\x73\xbc\x35\x8a\x9c\xa9\x83\xc1\x28\xed"
           "\xef\x4e\xe2\xa7\x40\x1c\xa3\xca\xd4\xe1\x4c\x3e\x85\xac\x16\x16"
           "\x88\x5f\xce\x4d\x44\x97\xe4\x74\xd3\x11\xcd\x69",
           220);
    syscall(__NR_write, r[0], 0x205c7f24, 0xdc);
    break;
  case 3:
    syscall(__NR_read, r[0], 0x20861000, 0);
    break;
  }
}

void test()
{
  memset(r, -1, sizeof(r));
  execute(4);
}

int main()
{
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      for (;;) {
        loop();
      }
    }
  }
  sleep(1000000);
  return 0;
}