// https://syzkaller.appspot.com/bug?id=e2dc9aea0465d1eea101bb24cb463e2a7efe7d17
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/mount.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 <stdlib.h>
#include <string.h>
#include <sys/stat.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 void exitf(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(kRetryStatus);
}

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

static void remove_dir(const char* dir)
{
  DIR* dp;
  struct dirent* ep;
  int iter = 0;
retry:
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exitf("opendir(%s) failed due to NOFILE, exiting");
    }
    exitf("opendir(%s) failed", dir);
  }
  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))
      exitf("lstat(%s) failed", filename);
    if (S_ISDIR(st.st_mode)) {
      remove_dir(filename);
      continue;
    }
    int i;
    for (i = 0;; i++) {
      if (unlink(filename) == 0)
        break;
      if (errno == EROFS) {
        break;
      }
      if (errno != EBUSY || i > 100)
        exitf("unlink(%s) failed", filename);
      if (umount2(filename, MNT_DETACH))
        exitf("umount(%s) failed", filename);
    }
  }
  closedir(dp);
  int i;
  for (i = 0;; i++) {
    if (rmdir(dir) == 0)
      break;
    if (i < 100) {
      if (errno == EROFS) {
        break;
      }
      if (errno == EBUSY) {
        if (umount2(dir, MNT_DETACH))
          exitf("umount(%s) failed", dir);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exitf("rmdir(%s) failed", dir);
  }
}

static void test();

void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    char cwdbuf[256];
    sprintf(cwdbuf, "./%d", iter);
    if (mkdir(cwdbuf, 0777))
      fail("failed to mkdir");
    int pid = fork();
    if (pid < 0)
      fail("loop fork failed");
    if (pid == 0) {
      prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
      setpgrp();
      if (chdir(cwdbuf))
        fail("failed to chdir");
      test();
      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) {
        kill(-pid, SIGKILL);
        kill(pid, SIGKILL);
        while (waitpid(-1, &status, __WALL) != pid) {
        }
        break;
      }
    }
    remove_dir(cwdbuf);
  }
}

long r[2];
void test()
{
  memset(r, -1, sizeof(r));
  syscall(__NR_mmap, 0x20000000, 0xfff000, 0x3, 0x32, 0xffffffff, 0x0);
  r[0] = syscall(__NR_socket, 0x26, 0x5, 0x0);
  *(uint16_t*)0x2038c000 = 0x26;
  memcpy((void*)0x2038c002,
         "\x73\x6b\x63\x69\x70\x68\x65\x72\x00\x00\x00\x00\x00\x00",
         14);
  *(uint32_t*)0x2038c010 = 0x0;
  *(uint32_t*)0x2038c014 = 0x0;
  memcpy((void*)0x2038c018,
         "\x65\x63\x62\x2d\x74\x77\x6f\x66\x69\x73\x68\x2d\x61\x76\x78"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00",
         64);
  syscall(__NR_bind, r[0], 0x2038c000, 0x58);
  memcpy((void*)0x201ec000, "\x0a\x07\x75\xb0\xd5\xe3\x83\xe5\xb3\xb6"
                            "\x0c\xed\x5c\x54\xdb\xb7",
         16);
  syscall(__NR_setsockopt, r[0], 0x117, 0x1, 0x201ec000, 0x10);
  r[1] = syscall(__NR_accept, r[0], 0x0, 0x0);
  *(uint64_t*)0x20f74fc8 = 0x0;
  *(uint32_t*)0x20f74fd0 = 0x0;
  *(uint64_t*)0x20f74fd8 = 0x20381ff0;
  *(uint64_t*)0x20f74fe0 = 0x1;
  *(uint64_t*)0x20f74fe8 = 0x2090efb8;
  *(uint64_t*)0x20f74ff0 = 0x18;
  *(uint32_t*)0x20f74ff8 = 0x0;
  *(uint64_t*)0x20381ff0 = 0x2091c000;
  *(uint64_t*)0x20381ff8 = 0x280;
  memcpy(
      (void*)0x2091c000,
      "\x5d\xfb\xc3\x3d\xc1\x9c\xb8\x70\x84\x3d\xf3\x02\x73\xb3\x81\xfa"
      "\xa8\xd6\x2a\x74\xea\xc9\x3d\x92\x5f\x73\x14\x76\x83\xc8\x0e\x60"
      "\x33\x71\x91\xa5\x8d\xf0\xc2\xc6\xd5\xb8\x70\xca\x6e\x04\xca\xf4"
      "\x1e\xab\x5e\x60\x6a\x54\x00\xab\x3f\x2b\x56\xcf\xac\x84\x40\x12"
      "\x00\x88\x5e\x8e\xd0\x98\xaa\x66\x15\xba\x7d\x2e\x3a\x54\x5e\x7c"
      "\x9e\xbb\x48\x84\x3f\x0a\x66\x11\x47\x64\x42\x88\xac\x33\xc0\x34"
      "\xe2\x1d\x98\x66\xce\xa3\x16\x44\x1b\x3f\xca\x92\x94\x25\xac\x31"
      "\xac\x96\xfa\xe3\x8c\x27\x9f\xaa\x18\xcb\xd3\xfc\x29\x2a\xab\x32"
      "\xde\x88\x5d\x74\x9a\xf3\xdb\x38\x9d\x1e\x12\x8e\x78\x08\x0b\x2c"
      "\x00\x2a\x5f\xa9\xc8\xab\x59\xac\x3a\xaa\x03\x44\x84\x9a\x06\x16"
      "\xe8\x11\xf0\x92\xef\x32\xd1\x56\xb4\xdb\x5b\x36\xb9\x68\x94\x37"
      "\xda\x01\xe8\xf9\x6d\x5a\x7b\x94\x33\x60\x2b\xc3\x59\x98\x91\x12"
      "\x9d\x5a\xa3\xb8\x84\xcd\x91\x5f\x01\x2b\xf4\x05\x46\x3e\xef\x85"
      "\x8d\x87\x49\x7d\xf9\x69\x35\xbd\x9f\x53\xc7\x34\xc1\x8b\x29\x8a"
      "\xd7\xa9\xb3\x78\xe8\xc5\x4c\x28\xa8\x9e\xa5\x7a\x59\x45\xaf\xd1"
      "\xb2\x3f\x6a\x45\x99\x37\x26\x9a\x10\x6e\x46\x7a\x29\x76\x6c\xbe"
      "\x0c\xc9\x6f\xd3\x06\xd6\x87\xdb\x2f\x13\x30\x84\x74\x5e\xa5\x73"
      "\xf3\x26\x39\x19\x88\x12\x34\xd9\x3a\xc5\x4d\xe6\x5e\xc1\x91\x13"
      "\x12\xfa\x2b\x2a\xfc\x9b\x16\xc6\x5d\x8a\xb8\x67\x82\xef\xf4\xfc"
      "\xfb\x00\xa1\x23\x63\x86\x28\x3f\x41\xe0\x95\x47\x40\xab\x75\x14"
      "\xc8\x50\x12\x6c\x40\x7f\xe2\x87\xec\x7a\x91\x76\xf3\xb2\xcc\xdd"
      "\x5b\x97\x01\x48\x84\x61\x88\xff\x57\xce\x85\xc4\x51\x63\xaf\x7d"
      "\xab\xcf\x89\x7f\x35\x8a\x20\xe7\x19\xc6\x9c\xd0\xc8\x93\xc3\x61"
      "\xdd\x8f\x5f\x5d\x86\x5a\xa8\x32\x4b\xe5\x76\xac\xb6\x60\x24\xb4"
      "\x60\x75\xaf\x67\x42\xd5\xf4\x4b\xf3\x4c\x86\x2f\x4f\xee\x23\x2c"
      "\x5d\x64\xc5\xbe\x17\x6d\x4f\x7d\x42\x2e\x69\xb7\xe5\xca\x45\xbe"
      "\x4c\xca\x3e\x6a\xe0\x4d\x90\x2f\x4d\x4f\xbd\x3c\x61\x37\x8d\x03"
      "\xd7\x84\x8e\x1e\xd6\x65\xf7\xe5\xa7\xcf\xe3\x9c\x7b\xb1\xd8\x50"
      "\xcf\x18\x88\x92\x30\x5f\xdc\x51\xf3\x2b\xc7\x22\xd2\x2b\x01\xf9"
      "\x77\x89\xd1\x9f\xcb\x6d\x7b\xf0\x43\xfb\x79\xfe\xde\x42\x7f\x43"
      "\x39\xc5\xe7\x0f\xb5\x3d\xf8\x15\xed\x0e\xd8\x6c\x29\x5b\xa5\xc8"
      "\x12\x7b\xe8\x3c\x02\x5f\xc0\x5e\x5f\x2e\x78\x21\x91\x60\x6c\x46"
      "\x3f\x77\xfc\x5c\xba\xb6\x3d\x19\x78\x71\x85\x58\x23\xc3\xb7\x92"
      "\x45\xa2\x93\x62\x18\x14\xc7\xc1\x13\x53\x51\x95\x75\xa8\xb9\xb6"
      "\x5a\x14\x92\x78\xa1\xa4\xa8\xf6\x99\xee\x0f\x7b\x4c\x3a\x29\x4b"
      "\xa6\x20\x2b\xaf\x49\x4b\x8a\x31\x58\x51\x3f\xab\x94\xb9\x82\xe2"
      "\x2a\x13\x85\x44\xc9\xdb\x8a\xfd\xf9\xf7\x1a\xb9\x30\x7f\x23\x71"
      "\x06\x34\xca\x6c\x7f\x7a\x02\x32\x76\xeb\x8f\x95\x30\xa8\x63\x29"
      "\xd8\x1e\xd4\xc2\xe4\x3d\xd1\x0d\x3d\x4b\xd0\xf9\x78\xd2\x5d\x58"
      "\x54\xd5\x43\x74\x48\x72\x1d\x7f\x5a\x2e\x3d\x1f\x99\xd7\xf3"
      "\xf6",
      640);
  *(uint64_t*)0x2090efb8 = 0x18;
  *(uint32_t*)0x2090efc0 = 0x117;
  *(uint32_t*)0x2090efc4 = 0x3;
  *(uint32_t*)0x2090efc8 = 0x1;
  syscall(__NR_sendmsg, r[1], 0x20f74fc8, 0x0);
  *(uint64_t*)0x20b2dfc8 = 0x207ebffa;
  *(uint32_t*)0x20b2dfd0 = 0x6;
  *(uint64_t*)0x20b2dfd8 = 0x20f75000;
  *(uint64_t*)0x20b2dfe0 = 0x2;
  *(uint64_t*)0x20b2dfe8 = 0x20ec7000;
  *(uint64_t*)0x20b2dff0 = 0x6b;
  *(uint32_t*)0x20b2dff8 = 0x0;
  *(uint64_t*)0x20f75000 = 0x2074b000;
  *(uint64_t*)0x20f75008 = 0x95;
  *(uint64_t*)0x20f75010 = 0x20f11000;
  *(uint64_t*)0x20f75018 = 0x1000;
  syscall(__NR_recvmsg, r[1], 0x20b2dfc8, 0x0);
}

int main()
{
  use_temporary_dir();
  loop();
  return 0;
}