// https://syzkaller.appspot.com/bug?id=534c3e964e6834c4ec17463f583965943a9ad68f
// 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[2] = {0xffffffffffffffff, 0xffffffffffffffff};
unsigned long long procid;
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    syscall(__NR_mmap, 0x20000000, 0xe73000, 3, 0x400000000000036, -1, 0);
    break;
  case 1:
    res = syscall(__NR_socket, 0xa, 2, 0);
    if (res != -1)
      r[0] = res;
    break;
  case 2:
    res = syscall(__NR_socket, 0x18, 1, 1);
    if (res != -1)
      r[1] = res;
    break;
  case 3:
    *(uint16_t*)0x20e71000 = 0x18;
    *(uint32_t*)0x20e71002 = 1;
    *(uint32_t*)0x20e71006 = 0;
    *(uint32_t*)0x20e7100a = r[0];
    *(uint16_t*)0x20e7100e = 3;
    *(uint16_t*)0x20e71010 = 0;
    *(uint16_t*)0x20e71012 = 3;
    *(uint16_t*)0x20e71014 = 0;
    *(uint16_t*)0x20e71016 = 0xa;
    *(uint16_t*)0x20e71018 = htobe16(2);
    *(uint32_t*)0x20e7101a = 3;
    *(uint8_t*)0x20e7101e = 0xfe;
    *(uint8_t*)0x20e7101f = 0x80;
    *(uint8_t*)0x20e71020 = 0;
    *(uint8_t*)0x20e71021 = 0;
    *(uint8_t*)0x20e71022 = 0;
    *(uint8_t*)0x20e71023 = 0;
    *(uint8_t*)0x20e71024 = 0;
    *(uint8_t*)0x20e71025 = 0;
    *(uint8_t*)0x20e71026 = 0;
    *(uint8_t*)0x20e71027 = 0;
    *(uint8_t*)0x20e71028 = 0;
    *(uint8_t*)0x20e71029 = 0;
    *(uint8_t*)0x20e7102a = 0;
    *(uint8_t*)0x20e7102b = 0;
    *(uint8_t*)0x20e7102c = 0;
    *(uint8_t*)0x20e7102d = 0;
    *(uint32_t*)0x20e7102e = 4;
    syscall(__NR_connect, r[1], 0x20e71000, 0x32);
    break;
  case 4:
    *(uint16_t*)0x200001c0 = 0x27;
    *(uint32_t*)0x200001c4 = 0;
    *(uint32_t*)0x200001c8 = 1;
    *(uint32_t*)0x200001cc = 7;
    syscall(__NR_sendto, r[1], 0x20000100, 0, 0x20000000, 0x200001c0, 0x80);
    break;
  case 5:
    *(uint16_t*)0x200002c0 = 0xa;
    *(uint16_t*)0x200002c2 = htobe16(0x4e20);
    *(uint32_t*)0x200002c4 = 1;
    *(uint8_t*)0x200002c8 = 0;
    *(uint8_t*)0x200002c9 = 0;
    *(uint8_t*)0x200002ca = 0;
    *(uint8_t*)0x200002cb = 0;
    *(uint8_t*)0x200002cc = 0;
    *(uint8_t*)0x200002cd = 0;
    *(uint8_t*)0x200002ce = 0;
    *(uint8_t*)0x200002cf = 0;
    *(uint8_t*)0x200002d0 = 0;
    *(uint8_t*)0x200002d1 = 0;
    *(uint8_t*)0x200002d2 = 0;
    *(uint8_t*)0x200002d3 = 0;
    *(uint8_t*)0x200002d4 = 0;
    *(uint8_t*)0x200002d5 = 0;
    *(uint8_t*)0x200002d6 = 0;
    *(uint8_t*)0x200002d7 = 0;
    *(uint32_t*)0x200002d8 = 5;
    syscall(__NR_sendto, r[0], 0x20000280, 0, 1, 0x200002c0, 0x1c);
    break;
  }
}

void execute_one()
{
  execute(6);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      for (;;) {
        loop();
      }
    }
  }
  sleep(1000000);
  return 0;
}