// https://syzkaller.appspot.com/bug?id=6225e7b911f6977538f7bd519ba9811d9fc2cb94
// 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}

#include <setjmp.h>
#include <signal.h>
#include <stdint.h>
#include <string.h>
#include <string.h>

static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* uctx)
{
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
      (addr < prog_start || addr > prog_end)) {
    _longjmp(segv_env, 1);
  }
  doexit(sig);
}

static void install_segv_handler()
{
  struct sigaction sa;

  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);

  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                \
  {                                                                    \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);               \
    if (_setjmp(segv_env) == 0) {                                      \
      __VA_ARGS__;                                                     \
    }                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);               \
  }

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;
    NONFAILING(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 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];
uint64_t procid;
void execute_call(int call)
{
  switch (call) {
  case 0:
    NONFAILING(memcpy((void*)0x20f70000, "/dev/input/mice", 16));
    r[0] = syz_open_dev(0x20f70000, 0x0, 0x141000);
    break;
  case 1:
    syscall(__NR_mmap, 0x20000000, 0x1000, 0x3, 0x32, 0xffffffff, 0x0);
    break;
  case 2:
    NONFAILING(*(uint32_t*)0x20000f60 = 0x0);
    NONFAILING(*(uint16_t*)0x20000f64 = 0x2);
    NONFAILING(*(uint16_t*)0x20000f66 =
                   htobe16(0x4e20 + procid * 0x4ul));
    NONFAILING(*(uint8_t*)0x20000f68 = 0xac);
    NONFAILING(*(uint8_t*)0x20000f69 = 0x14);
    NONFAILING(*(uint8_t*)0x20000f6a = 0x0 + procid * 0x1ul);
    NONFAILING(*(uint8_t*)0x20000f6b = 0xbb);
    NONFAILING(*(uint8_t*)0x20000f6c = 0x0);
    NONFAILING(*(uint8_t*)0x20000f6d = 0x0);
    NONFAILING(*(uint8_t*)0x20000f6e = 0x0);
    NONFAILING(*(uint8_t*)0x20000f6f = 0x0);
    NONFAILING(*(uint8_t*)0x20000f70 = 0x0);
    NONFAILING(*(uint8_t*)0x20000f71 = 0x0);
    NONFAILING(*(uint8_t*)0x20000f72 = 0x0);
    NONFAILING(*(uint8_t*)0x20000f73 = 0x0);
    NONFAILING(*(uint64_t*)0x20000f74 = 0x0);
    NONFAILING(*(uint64_t*)0x20000f7c = 0x0);
    NONFAILING(*(uint64_t*)0x20000f84 = 0x0);
    NONFAILING(*(uint64_t*)0x20000f8c = 0x0);
    NONFAILING(*(uint64_t*)0x20000f94 = 0x0);
    NONFAILING(*(uint64_t*)0x20000f9c = 0x0);
    NONFAILING(*(uint64_t*)0x20000fa4 = 0x0);
    NONFAILING(*(uint64_t*)0x20000fac = 0x0);
    NONFAILING(*(uint64_t*)0x20000fb4 = 0x0);
    NONFAILING(*(uint64_t*)0x20000fbc = 0x0);
    NONFAILING(*(uint64_t*)0x20000fc4 = 0x0);
    NONFAILING(*(uint64_t*)0x20000fcc = 0x0);
    NONFAILING(*(uint64_t*)0x20000fd4 = 0x0);
    NONFAILING(*(uint64_t*)0x20000fdc = 0x0);
    NONFAILING(*(uint64_t*)0x20000fe4 = 0x0);
    NONFAILING(*(uint32_t*)0x20000fec = 0xfffffff9);
    NONFAILING(*(uint32_t*)0x20000ff0 = 0xf941);
    NONFAILING(*(uint32_t*)0x20000ff4 = 0x1ff);
    NONFAILING(*(uint32_t*)0x20000ff8 = 0x0);
    NONFAILING(*(uint32_t*)0x20000ffc = 0x49c);
    NONFAILING(*(uint32_t*)0x204a0000 = 0xa0);
    if (syscall(__NR_getsockopt, 0xffffffff, 0x84, 0xf, 0x20000f60,
                0x204a0000) != -1) {
      NONFAILING(r[1] = *(uint32_t*)0x20000f60);
    }
    break;
  case 3:
    NONFAILING(*(uint32_t*)0x20e23ff8 = r[1]);
    NONFAILING(*(uint32_t*)0x20e23ffc = 0x3);
    syscall(__NR_setsockopt, r[0], 0x84, 0x76, 0x20e23ff8, 0x8);
    break;
  case 4:
    syscall(__NR_mmap, 0x20000000, 0xfff000, 0x3, 0x32, 0xffffffff,
            0x0);
    break;
  case 5:
    NONFAILING(memcpy((void*)0x208be000, "/dev/usbmon#", 13));
    r[2] = syz_open_dev(0x208be000, 0x0, 0x0);
    break;
  case 6:
    syscall(__NR_mmap, 0x20000000, 0xfda000, 0x3, 0x32, 0xffffffff,
            0x0);
    break;
  case 7:
    if (syscall(__NR_io_setup, 0x8, 0x20fb1000) != -1) {
      NONFAILING(r[3] = *(uint64_t*)0x20fb1000);
    }
    break;
  case 8:
    NONFAILING(*(uint64_t*)0x20fb1fd8 = 0x20fb1fc0);
    NONFAILING(*(uint64_t*)0x20fb1fc0 = 0x0);
    NONFAILING(*(uint32_t*)0x20fb1fc8 = 0x0);
    NONFAILING(*(uint32_t*)0x20fb1fcc = 0x0);
    NONFAILING(*(uint16_t*)0x20fb1fd0 = 0x0);
    NONFAILING(*(uint16_t*)0x20fb1fd2 = 0x0);
    NONFAILING(*(uint32_t*)0x20fb1fd4 = 0xffffffff);
    NONFAILING(*(uint64_t*)0x20fb1fd8 = 0x20333fd8);
    NONFAILING(*(uint64_t*)0x20fb1fe0 = 0x0);
    NONFAILING(*(uint64_t*)0x20fb1fe8 = 0x0);
    NONFAILING(*(uint64_t*)0x20fb1ff0 = 0x0);
    NONFAILING(*(uint32_t*)0x20fb1ff8 = 0x0);
    NONFAILING(*(uint32_t*)0x20fb1ffc = 0xffffffff);
    syscall(__NR_io_submit, r[3], 0x1, 0x20fb1fd8);
    break;
  case 9:
    syscall(__NR_mmap, 0x20ac6000, 0x4000, 0x1000004, 0x8011, r[2],
            0x0);
    break;
  case 10:
    syscall(__NR_ioctl, r[2], 0x9204, 0xf0b1);
    break;
  }
}

void test()
{
  memset(r, -1, sizeof(r));
  execute(11);
  collide = 1;
  execute(11);
}

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