// https://syzkaller.appspot.com/bug?id=650331ea066fb2b02c05bba66d1e50803960966f
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

unsigned long long procid;

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
  struct timespec ts;
  if (clock_gettime(CLOCK_MONOTONIC, &ts))
    exit(1);
  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  int i;
  for (i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      exit(0);
    }
    int status = 0;
    uint64_t start = current_time_ms();
    for (;;) {
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      sleep_ms(1);
      if (current_time_ms() - start < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0xa, 1, 0);
  if (res != -1)
    r[0] = res;
  res = syscall(__NR_dup2, r[0], r[0]);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000180,
         "\x6e\x61\x85\x31\x00\x02\x22\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\xe4\xdb\xb7\x74\x87\xe9\x01\x04\x00\xff\xff\xff\x7f\x00"
         "\x00\x00\x00\x1f\x00\x00\x00\x7d\x09\xd0\xc7\x05\x03\x00\x00\x18\x03"
         "\x00\x00\xcc\x00\x00\x00\xac\x01\x00\x00\x00\x08\x00\x00\x10\x04\xd1"
         "\xe0\x09\x00\x00\x00\x00\x08\x00\x00\xf3\x4f\x8d\xfa\xc0\xdc\x16\x95"
         "\xc4\xf8\x00\x0a\xe7\xb8\xbb\xb7\x6c\xab\x10\x04\x00\x00\x10\x04\x00"
         "\x02\xd3\x23\x79\xb8\x7c\x5a\xde\x6e\x68\xb6\x46\x9a\x22\x46\xd8\x17"
         "\x51\xc2\xf2\xd3\xc0\x0f\x3f\x72\xe2\x11\x77\x74\x24\xc9\x81\x4f\x1f"
         "\x85\x21\x10\xe5\xd4\x82\x0b\x06\x00\x00\x00\x6b\x63\x01\x28\x12\xd0"
         "\x4b\x94\xd6\x60\xaa\x85\x5e\xcf\xe8\xd6\x8c\x22\xb8\x66\xcd\x44\x5d"
         "\x5d\x0f\x4d\x67\x15\xba\x08\x59\x00\x32\x3e\x00\x00\x06\x70\x00\xe4"
         "\xe8\xc7\xcf\xd3\xf3\x7b\xbf\x2c\x96\xb9\x87\x14\x74\x82\x23\xb6\x78"
         "\x48\x74\x12\xdb\x88\x74\xe0\xdf\x9a\x15\xc8\x8c\xa3\xba\x72\x0c\xde"
         "\xc5\xc6\x05\x75\x60\x24\x2a\xbf\xd4\xf4\xfe\x77\x1b\x56\x53\x81\xfe"
         "\xa2\xe1\x1d\x39\x0d\xa3\x6d\xed\xb3\xb6\xb7\x15\x16\xe9\xf2\x5a\xb2"
         "\xc5\x32\x0c\x8f\xfe\x39\xfa\x96\x7b\x15\x83\x54\x4f\x80\xa4\xa3\xe9"
         "\x36\x63\x12\xad\x05\xd9\x1c\x2e\x2d\x1e\xbc\x7b\x89\x09\x6b\xa2\x14"
         "\x1b\x08\x10\x8c\x07\x02\xa0\x2a\xc9\x6f\x43\x96\x0d\x58\xac\xab\x6b"
         "\xd9\xf1\x62\x39\x55\x5c\x10\x66\x1f\xe0\xc9\x9f\xa4\x79\xf6\x8e\x6c"
         "\x0e\x41\xab\x02\x6a\x97\xb0\x22\x1b\xc8\xb4\xcb\xcb\x51\x43\x55\xca"
         "\x4b\x66\x62\x96\x37\xfc\xd8\xad\x05\xad\x43\xb8\xe0\x0e\xc5\xbc\xf6"
         "\x23\x13\xc4\xeb\xc8\x8b\x58\xb0",
         365);
  syscall(__NR_setsockopt, r[1], 0, 0x40, 0x20000180, 1);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}