// https://syzkaller.appspot.com/bug?id=282e2b3c76b4d2fc3e28d16518b757336a40b4f7
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <linux/futex.h>
#include <pthread.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <time.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 <string.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 uint64_t current_time_ms()
{
  struct timespec ts;

  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    fail("clock_gettime failed");
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void execute_one();
extern unsigned long long procid;

static void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      fail("clone failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      execute_one();
      int fd;
      for (fd = 3; fd < 30; fd++)
        close(fd);
      doexit(0);
    }

    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      int res = waitpid(-1, &status, __WALL | WNOHANG);
      if (res == pid) {
        break;
      }
      usleep(1000);
      if (current_time_ms() - start < 5 * 1000)
        continue;
      kill(-pid, SIGKILL);
      kill(pid, SIGKILL);
      while (waitpid(-1, &status, __WALL) != pid) {
      }
      break;
    }
  }
}

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 (__atomic_load_n(&running, __ATOMIC_RELAXED))
          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, 0x2b, 1, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    *(uint64_t*)0x200024c0 = 0;
    *(uint32_t*)0x200024c8 = 0;
    *(uint64_t*)0x200024d0 = 0x20000340;
    *(uint64_t*)0x20000340 = 0x20000080;
    *(uint64_t*)0x20000348 = 0;
    *(uint64_t*)0x20000350 = 0x20000380;
    memcpy((void*)0x20000380,
           "\xfe\xb4\x97\xaa\xe7\x39\x11\xfb\x88\xc3\xd6\x1c\xec\x83\xb0\x03"
           "\x62\x5b\x82\x39\xaa\x7c\xab\x61\x79\xb8\xaf\xee\x90\x96\x29\xc3"
           "\x72\x46\x75\x7e\xae\x1c\x22\xc0\x8c\xf5\x9d\x8c\x4a\xdb\xd6\xeb"
           "\x8e\x81\x33\xf3\x2b\xb7\x1f\x73\xd9\xe8\x17\x59\x95\x9f\xff\x51"
           "\x68\x26\x84\x44\x98\x05\xd0\x7b\xf3\xa3\x0f\x84\x34\x7b\x80\xd8"
           "\x65\x8c\xed\x3c\x6a\x76\xf0\x3e\x3e\xac\xd5\xdd\x49\xfc\x46\x8b"
           "\x93\x30\xdd\xd6\xe4\xe6\xf7\xe8\xf4\x21\x67\xb8\xd1\xec\x96\x91"
           "\xa0\xb7\xb0\x3f\x95\x7b\x07\xbb\x7c\xf8\x9c\x20\x63\xc1\x01\x98"
           "\xc3\xe3\x29\xaa\xea\xab\x5b\x81\xac\xcd\x11\x80\x8b\x85\x44\xd9"
           "\x96\xcf\x90\x7f\xa3\xc8\x40\xae\xda\x5d\x14\xdf\x25\xcc\x23\x4f"
           "\xde\xc8\x4e\x28\x3f\xf4\x3d\x07\xfb\xb6\x0a\xe2\x55\x62\x32\x1b"
           "\xfb\x54\xda\x3c\xe1\xdb\xc4\xa0\xef\xdb\x51\x74\x9b\xe5\xfe\xbf"
           "\xe2\x77\x13\x57\xbd\x9e\x99\xa4\xc5\xdf\x79\xb6\xa1\x64\x90\x57",
           208);
    *(uint64_t*)0x20000358 = 0xd0;
    *(uint64_t*)0x20000360 = 0x20000240;
    *(uint64_t*)0x20000368 = 0;
    *(uint64_t*)0x200024d8 = 3;
    *(uint64_t*)0x200024e0 = 0;
    *(uint64_t*)0x200024e8 = 0;
    *(uint32_t*)0x200024f0 = 0;
    syscall(__NR_sendmsg, r[0], 0x200024c0, 0x20008010);
    break;
  case 2:
    syscall(__NR_listen, r[0], 0);
    break;
  }
}

void execute_one()
{
  execute(3);
}

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