// https://syzkaller.appspot.com/bug?id=acc91fc5738dacbfaa1163219fc6bf0685224b60
// 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>

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);
  for (int 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 = 0;
  for (;; 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 < 15000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x20000040, "/dev/ptmx\000", 10);
  res = syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000040ul, 0x401ul, 0ul);
  if (res != -1)
    r[0] = res;
  syscall(__NR_ioctl, r[0], 0x5403, 0ul);
  memcpy(
      (void*)0x20000140,
      "\x06\xfe\x30\x76\x4f\x5b\xb2\xca\x92\xe5\xcc\x63\x56\x74\x0d\x36\xdb\xc8"
      "\xc1\x4a\x81\x65\x46\x98\xb2\x96\xd2\xd0\xb8\x59\x63\x8b\x96\x02\xf9\xa6"
      "\x61\x0e\xce\xbb\x23\xa9\xb2\xda\x70\x1b\x5d\x08\x8b\x11\xb1\x83\xb2\x94"
      "\x5d\x1a\x6a\x2e\x24\x9c\xef\xd4\xf9\xe2\x24\x10\xb2\x22\xe4\x43\xc4\x57"
      "\x33\xc3\x4b\xd1\x0f\x48\xaa\x22\xe3\x16\x7b\x16\xa4\x85\x28\xc3\x5b\x92"
      "\x5a\x48\x7c\xa8\x37\x60\x59\x5a\x0e\x1a\xdd\x4d\x2c\xc9\xc8\x1d\x13\xd6"
      "\x7c\x2d\xd2\x7f\xa5\x66\x6d\xa4\xfc\x1e\xc5\x43\x85\xd2\x89\xe3\x71\x39"
      "\x07\x26\xa1\x13\x58\xd8\xa2\x9d\x18\xde\xcc\x5e\x09\x2c\x80\x03\x7b\xa4"
      "\x49\x21\x90\x67\xec\xa0\x87\x4d\xb8\x49\xdf\xa0\xee\xe4\xa8\x29\xa4\xbd"
      "\x4a\xe6\xb8\x7d\xab\x89\x11\x53\xa9\x00\x93\x99\xf5\xb8\xad\x31\xd5\xed"
      "\x80\xe9\xd9\xaf\xfc\x6c\x5b\x0a",
      188);
  syscall(__NR_write, r[0], 0x20000140ul, 0xbcul);
}
int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  loop();
  return 0;
}