// 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;
      }
    }
  }
}

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:
    *(uint64_t*)0x201b6f90 = 0x20e43000;
    *(uint64_t*)0x201b6f98 = 0x6a;
    *(uint64_t*)0x201b6fa0 = 0x2012afff;
    *(uint64_t*)0x201b6fa8 = 0;
    *(uint64_t*)0x201b6fb0 = 0x202f5f0b;
    *(uint64_t*)0x201b6fb8 = 0;
    *(uint64_t*)0x201b6fc0 = 0x20634f5d;
    *(uint64_t*)0x201b6fc8 = 0;
    *(uint64_t*)0x201b6fd0 = 0x202e3fa8;
    *(uint64_t*)0x201b6fd8 = 0;
    *(uint64_t*)0x201b6fe0 = 0x20de5f59;
    *(uint64_t*)0x201b6fe8 = 0;
    *(uint64_t*)0x201b6ff0 = 0x20288000;
    *(uint64_t*)0x201b6ff8 = 0;
    memcpy((void*)0x20e43000,
           "\xe5\x9b\xc0\x53\xdc\xe4\x04\x31\x7b\xb5\x1f\x59\x7e\xa6\xfe\xb2"
           "\x7c\x63\x71\x10\x0c\xa6\xf5\xc5\x3d\xed\x1c\x2f\x0f\xd1\xc9\x2c"
           "\x1f\x80\x82\xc2\x12\xf7\xfe\xad\xb3\xaf\x9f\x07\x69\x4a\x7a\x99"
           "\x03\x07\x95\x98\xae\x4e\xf5\xd5\x9f\x23\x0f\xb5\x50\x1c\xc9\x70"
           "\xe2\x62\x4d\xb6\x29\x27\x59\xf2\x04\xd3\x0c\xf0\xd6\x34\x6d\x8e"
           "\xa5\xde\x77\x3c\x25\x57\xd5\xaa\x36\x7d\x15\x8c\x63\xff\xa7\x7b"
           "\x1f\x08\x77\x92\xca\x17\x5d\xb2\x19\x9c",
           106);
    syscall(__NR_writev, r[0], 0x201b6f90, 7);
    break;
  case 3:
    *(uint64_t*)0x200b8fb0 = 0x2041bf1a;
    *(uint64_t*)0x200b8fb8 = 0;
    *(uint64_t*)0x200b8fc0 = 0x20858f42;
    *(uint64_t*)0x200b8fc8 = 0;
    *(uint64_t*)0x200b8fd0 = 0x20a42ffe;
    *(uint64_t*)0x200b8fd8 = 0x1d;
    *(uint64_t*)0x200b8fe0 = 0x20e3f000;
    *(uint64_t*)0x200b8fe8 = 0;
    *(uint64_t*)0x200b8ff0 = 0x20859ff7;
    *(uint64_t*)0x200b8ff8 = 0;
    syscall(__NR_readv, r[0], 0x200b8fb0, 5);
    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;
}