// https://syzkaller.appspot.com/bug?id=28f3c6f048653756fa6d137e67309ad83c7f2fde
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <linux/futex.h>
#include <pthread.h>
#include <stdlib.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 <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static void use_temporary_dir()
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    fail("failed to mkdtemp");
  if (chmod(tmpdir, 0777))
    fail("failed to chmod");
  if (chdir(tmpdir))
    fail("failed to chdir");
}

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;
      }
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    res = syscall(__NR_socket, 2, 0x4000000000000001, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint16_t*)0x20deb000 = 2;
    *(uint16_t*)0x20deb002 = htobe16(0x4e23);
    *(uint32_t*)0x20deb004 = htobe32(0xe0000001);
    *(uint8_t*)0x20deb008 = 0;
    *(uint8_t*)0x20deb009 = 0;
    *(uint8_t*)0x20deb00a = 0;
    *(uint8_t*)0x20deb00b = 0;
    *(uint8_t*)0x20deb00c = 0;
    *(uint8_t*)0x20deb00d = 0;
    *(uint8_t*)0x20deb00e = 0;
    *(uint8_t*)0x20deb00f = 0;
    syscall(__NR_bind, r[0], 0x20deb000, 0x10);
    break;
  case 2:
    *(uint16_t*)0x20e68000 = 2;
    *(uint16_t*)0x20e68002 = htobe16(0x4e23);
    *(uint32_t*)0x20e68004 = htobe32(0x7f000001);
    *(uint8_t*)0x20e68008 = 0;
    *(uint8_t*)0x20e68009 = 0;
    *(uint8_t*)0x20e6800a = 0;
    *(uint8_t*)0x20e6800b = 0;
    *(uint8_t*)0x20e6800c = 0;
    *(uint8_t*)0x20e6800d = 0;
    *(uint8_t*)0x20e6800e = 0;
    *(uint8_t*)0x20e6800f = 0;
    syscall(__NR_sendto, r[0], 0x20a88f88, 0x29f, 0x200007fd, 0x20e68000, 0x10);
    break;
  case 3:
    *(uint32_t*)0x200000c0 = -1;
    syscall(__NR_write, r[0], 0x200000c0, 0xffffffe7);
    break;
  case 4:
    *(uint64_t*)0x20000140 = 0x20000080;
    *(uint16_t*)0x20000080 = 0x10;
    *(uint16_t*)0x20000082 = 0;
    *(uint32_t*)0x20000084 = 0;
    *(uint32_t*)0x20000088 = 0;
    *(uint32_t*)0x20000148 = 0xc;
    *(uint64_t*)0x20000150 = 0x20000100;
    *(uint64_t*)0x20000100 = 0x200003c0;
    *(uint32_t*)0x200003c0 = 0x14;
    *(uint8_t*)0x200003c4 = 0;
    *(uint8_t*)0x200003c5 = 0;
    *(uint16_t*)0x200003c6 = 0;
    *(uint32_t*)0x200003c8 = 0;
    *(uint32_t*)0x200003cc = 0;
    *(uint8_t*)0x200003d0 = 0;
    *(uint8_t*)0x200003d1 = 0;
    *(uint16_t*)0x200003d2 = htobe16(0);
    *(uint64_t*)0x20000108 = 0x14;
    *(uint64_t*)0x20000158 = 1;
    *(uint64_t*)0x20000160 = 0;
    *(uint64_t*)0x20000168 = 0;
    *(uint32_t*)0x20000170 = 0;
    syscall(__NR_sendmsg, r[0], 0x20000140, 0);
    break;
  case 5:
    *(uint16_t*)0x20000000 = 0;
    *(uint8_t*)0x20000002 = 0;
    *(uint32_t*)0x20000004 = 0;
    syscall(__NR_connect, r[0], 0x20000000, 0x80);
    break;
  case 6:
    *(uint16_t*)0x20000180 = 2;
    *(uint16_t*)0x20000182 = htobe16(0x4e23);
    *(uint32_t*)0x20000184 = htobe32(0x7f000001);
    *(uint8_t*)0x20000188 = 0;
    *(uint8_t*)0x20000189 = 0;
    *(uint8_t*)0x2000018a = 0;
    *(uint8_t*)0x2000018b = 0;
    *(uint8_t*)0x2000018c = 0;
    *(uint8_t*)0x2000018d = 0;
    *(uint8_t*)0x2000018e = 0;
    *(uint8_t*)0x2000018f = 0;
    syscall(__NR_connect, r[0], 0x20000180, 0x10);
    break;
  }
}

void loop()
{
  execute(7);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  use_temporary_dir();
  loop();
  return 0;
}