// https://syzkaller.appspot.com/bug?id=d24b4ec7e5e1012fd107fa6f3a163fd14a0bade9
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <sys/types.h>

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

static void kill_and_wait(int pid, int* status)
{
  kill(pid, SIGKILL);
  while (waitpid(-1, status, 0) != pid) {
  }
}

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 void use_temporary_dir(void)
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    exit(1);
  if (chmod(tmpdir, 0777))
    exit(1);
  if (chdir(tmpdir))
    exit(1);
}

static void __attribute__((noinline)) remove_dir(const char* dir)
{
  DIR* dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EACCES) {
      if (rmdir(dir))
        exit(1);
      return;
    }
    exit(1);
  }
  struct dirent* ep = 0;
  while ((ep = readdir(dp))) {
    if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
      continue;
    char filename[FILENAME_MAX];
    snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    if (unlink(filename))
      exit(1);
  }
  closedir(dp);
  if (rmdir(dir))
    exit(1);
}

static void execute_one(void);

#define WAIT_FLAGS 0

static void loop(void)
{
  int iter = 0;
  for (;; iter++) {
    char cwdbuf[32];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      exit(1);
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      if (chdir(cwdbuf))
        exit(1);
      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 < 5000) {
        continue;
      }
      kill_and_wait(pid, &status);
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x200000c0, "/dev/pf\000", 8);
  res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x200000c0ul, 0x18189ul, 0ul);
  if (res != -1)
    r[0] = res;
  memcpy(
      (void*)0x20000100,
      "\xd7\x5c\x46\xe7\xa8\x0b\xc9\xe4\xf4\x6a\xdb\xc9\x95\xe9\xa5\x83\x6a\x7b"
      "\x48\xab\xe4\x3d\x5b\xf2\x50\xc1\x96\x0a\xd2\x9c\x87\x21\x5a\xe2\x63\x32"
      "\x47\x4d\xea\x1e\x35\x24\x2e\x6a\x18\x50\xfe\xa9\x08\xcc\x45\x67\xc8\xad"
      "\x50\x0e\x85\xc5\x67\x49\x9e\xe4\xfc\xaf\xcb\xd1\xb6\x6f\xdc\x21\xad\xb5"
      "\xad\xd4\x6e\xd4\x91\x31\x2b\xe8\x19\xa0\x49\x80\xfd\xd0\x7b\x41\xe6\x06"
      "\x98\xb9\xb2\x24\x23\x40\xe1\x0f\xc2\x91\xbd\x8a\x16\xe9\x50\xce\xdc\x28"
      "\x71\x57\xb5\xa0\xed\x00\xde\x0d\xa5\x4e\x97\x9b\xea\x8c\xf0\x87\x80\x52"
      "\xcc\x63\xb7\x5a\x6c\x5a\xa9\x67\x85\x15\x75\x20\x83\x48\xed\xe6\x02\xb3"
      "\x36\x6b\x5c\xd6\x78\x60\x9c\x12\xb0\xe0\xb6\xac\xf9\xd9\x7b\x54\xd1\x80"
      "\x1c\x05\xaa\xa1\xe8\x5b\x55\x7f\xd1\xd3\x64\x18\xce\xcf\x3f\x10\x41\x5a"
      "\x90\x39\x33\xa9\x63\x12\x1b\x86\x71\xfd\xeb\xf2\x7f\x81\xf5\x01\x93\x30"
      "\xe1\xe3\xd0\x5a\x69\xad\x7b\x9b\xa0\x31\xf5\xac\x6d\xfe\x6b\x89\x1b\x2a"
      "\x1d\x0b\x74\xe1\xb4\x4f\xa8\xf0\xb6\x39\x92\x73\xf0\x5d\x23\xc1\x7e\x01"
      "\x70\x96\x02\xd5\xb7\xd1\x81\x5c\x87\x3b\x27\xc6",
      246);
  syscall(SYS_ioctl, r[0], 0xc0e04412ul, 0x20000100ul);
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
  use_temporary_dir();
  loop();
  return 0;
}