// 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 <fcntl.h>
#include <linux/futex.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysmacros.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 uintptr_t syz_fuse_mount(uintptr_t a0, uintptr_t a1, uintptr_t a2,
                                uintptr_t a3, uintptr_t a4, uintptr_t a5)
{
  uint64_t target = a0;
  uint64_t mode = a1;
  uint64_t uid = a2;
  uint64_t gid = a3;
  uint64_t maxread = a4;
  uint64_t flags = a5;

  int fd = open("/dev/fuse", O_RDWR);
  if (fd == -1)
    return fd;
  char buf[1024];
  sprintf(buf, "fd=%d,user_id=%ld,group_id=%ld,rootmode=0%o", fd, (long)uid,
          (long)gid, (unsigned)mode & ~3u);
  if (maxread != 0)
    sprintf(buf + strlen(buf), ",max_read=%ld", (long)maxread);
  if (mode & 1)
    strcat(buf, ",default_permissions");
  if (mode & 2)
    strcat(buf, ",allow_other");
  syscall(SYS_mount, "", target, "fuse", flags, buf);
  return fd;
}

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 int collide;

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);
        if (collide && call % 2)
          break;
        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[4];
void execute_call(int call)
{
  switch (call) {
  case 0:
    syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0);
    break;
  case 1:
    syscall(__NR_getresgid, 0x20436000, 0x209beffc, 0x2087affc);
    break;
  case 2:
    memcpy((void*)0x208ce000, "./file0", 8);
    r[0] = syscall(__NR_openat, -1, 0x208ce000, 0x8000, 0x140);
    break;
  case 3:
    syscall(__NR_ioctl, r[0], 0x4b49, 0x2058b000);
    break;
  case 4:
    *(uint32_t*)0x20a88ffc = 0xc;
    if (syscall(__NR_getsockopt, 0xffffff9c, 1, 0x11, 0x20ac6000, 0x20a88ffc) !=
        -1)
      r[1] = *(uint32_t*)0x20ac6000;
    break;
  case 5:
    syscall(__NR_sched_rr_get_interval, r[1], 0x2052f000);
    break;
  case 6:
    syscall(__NR_pwritev, -1, 0x20623ff0, 0, 0x7fffc);
    break;
  case 7:
    memcpy((void*)0x20bf5ff6, "./control", 10);
    syscall(__NR_mkdir, 0x20bf5ff6, 0);
    break;
  case 8:
    memcpy((void*)0x20559ff6, "/dev/ptmx", 10);
    r[2] = syscall(__NR_openat, 0xffffffffffffff9c, 0x20559ff6, 0x106, 0);
    break;
  case 9:
    *(uint64_t*)0x20343ff0 = 0x208eb000;
    *(uint64_t*)0x20343ff8 = 0;
    syscall(__NR_writev, r[0], 0x20343ff0, 1);
    break;
  case 10:
    memcpy((void*)0x20057000, "./control", 10);
    memcpy((void*)0x20649ff6, "./control", 10);
    memcpy((void*)0x200e9000, "hpfs", 5);
    syscall(__NR_mount, 0x20057000, 0x20649ff6, 0x200e9000, 0x4000, 0x2075cf5a);
    break;
  case 11:
    *(uint8_t*)0x20933000 = 7;
    *(uint8_t*)0x20933001 = -1;
    syscall(__NR_ioctl, r[2], 0x541c, 0x20933000);
    break;
  case 12:
    *(uint32_t*)0x20201ffc = 0x7fff;
    syscall(__NR_ioctl, r[2], 0x5420, 0x20201ffc);
    break;
  case 13:
    memcpy((void*)0x20cf1ff6, "./control", 10);
    syz_fuse_mount(0x20cf1ff6, 0x6000, 0, 0, 0x1cc8, 0xffe);
    break;
  case 14:
    syscall(__NR_epoll_create, 0x88);
    break;
  case 15:
    *(uint64_t*)0x20060000 = 0xffff;
    syscall(__NR_sched_setaffinity, r[1], 8, 0x20060000);
    break;
  case 16:
    memcpy((void*)0x20e48000, "/dev/sg#", 9);
    r[3] = syz_open_dev(0x20e48000, 0, 2);
    break;
  case 17:
    *(uint64_t*)0x20016000 = 0x207bb000;
    *(uint64_t*)0x20016008 = 1;
    syscall(__NR_readv, r[3], 0x20016000, 1);
    break;
  case 18:
    *(uint64_t*)0x20001000 = 0;
    *(uint64_t*)0x20001008 = 6;
    *(uint16_t*)0x20001010 = 0;
    *(uint16_t*)0x20001012 = 0;
    *(uint32_t*)0x20001014 = 0;
    *(uint64_t*)0x20001018 = 0;
    *(uint64_t*)0x20001020 = 0;
    *(uint16_t*)0x20001028 = 0;
    *(uint16_t*)0x2000102a = 0;
    *(uint32_t*)0x2000102c = 0;
    *(uint64_t*)0x20001030 = 0;
    *(uint64_t*)0x20001038 = 0x2710;
    *(uint16_t*)0x20001040 = 0;
    *(uint16_t*)0x20001042 = 0;
    *(uint32_t*)0x20001044 = 0;
    *(uint64_t*)0x20001048 = 0;
    *(uint64_t*)0x20001050 = 0;
    *(uint16_t*)0x20001058 = 0;
    *(uint16_t*)0x2000105a = 0;
    *(uint32_t*)0x2000105c = 0;
    syscall(__NR_write, r[3], 0x20001000, 0x60);
    break;
  }
}

void test()
{
  memset(r, -1, sizeof(r));
  execute(19);
  collide = 1;
  execute(19);
}

int main()
{
  for (;;) {
    loop();
  }
}