// https://syzkaller.appspot.com/bug?id=665ea434ad520b56eb5069dfcd7753fedf617745
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.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/event.h>
#include <sys/ioctl.h>
#include <sys/ktrace.h>
#include <sys/mman.h>
#include <sys/msg.h>
#include <sys/resource.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

static unsigned long long procid;

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);
  while (rmdir(dir)) {
    exit(1);
  }
}

#define CAST

static void sandbox_common()
{
  if (setsid() == -1)
    exit(1);
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 256;
  setrlimit(RLIMIT_NOFILE, &rlim);
}

static void loop();

static int do_sandbox_none(void)
{
  sandbox_common();
  loop();
  return 0;
}

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

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x20000080, "/dev/rvnd0c\000", 12);
  res = -1;
  res = ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t))CAST(openat))(
      /*fd=*/0xffffffffffffff9c, /*file=*/0x20000080, /*flags=*/0, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  ((intptr_t(*)(intptr_t, intptr_t, intptr_t))CAST(ioctl))(
      /*fd=*/r[0], /*cmd=*/0x20006473, /*arg=*/0);
  *(uint64_t*)0x20000180 = 0;
  *(uint64_t*)0x20000188 = 1;
  *(uint64_t*)0x20000190 = 0;
  *(uint32_t*)0x20000198 = 0;
  ((intptr_t(*)(intptr_t, intptr_t, intptr_t))CAST(ioctl))(
      /*fd=*/r[0], /*cmd=*/0x80384601, /*arg=*/0x20000180);
  memcpy((void*)0x20000040, "./file0\000", 8);
  res = -1;
  res = ((intptr_t(*)(intptr_t, intptr_t, intptr_t))CAST(open))(
      /*file=*/0x20000040, /*flags=*/0x70e, /*mode=*/0);
  if (res != -1)
    r[1] = res;
  memcpy(
      (void*)0x20000340,
      "\xe1\x81\x90\xfc\x52\xf7\x15\xcd\x49\x97\xf6\x96\x7c\xb6\x32\xcb\x56\x0f"
      "\x2f\xa0\xc3\x60\xc0\x0c\xd3\xd4\x6c\xb3\xab\xec\x38\xad\x7f\x08\x7d\x2a"
      "\x07\xdf\xd3\x02\x54\x7e\x00\x00\x00\x00\x00\x00\xc2\x16\xf5\x2b\x8a\x80"
      "\xa3\xca\xff\x24\x33\xfe\x36\xbb\xa6\x34\x89\xd1\x06\x02\x00\x00\x08\x00"
      "\x02\x00\x00\x18\x98\x0e\x71\x80\x33\x1b\x37\xc0\x23\x2c\xb6\x54\xfa\x8f"
      "\x01\x1d\x48\x3c\xd4\xd3\x30\x7f\xaf\x64\x92\xbe\x2b\x64\x83\xb3\x9a",
      107);
  ((intptr_t(*)(intptr_t, intptr_t, intptr_t))CAST(write))(
      /*fd=*/r[1], /*buf=*/0x20000340, /*count=*/0xfffffe7f);
  *(uint64_t*)0x200006c0 = 0x200002c0;
  memcpy((void*)0x200002c0, "./file0\000", 8);
  *(uint64_t*)0x200006c8 = 1;
  *(uint64_t*)0x200006d0 = 0x20000680;
  memcpy((void*)0x20000680, "./file0/file0\000", 14);
  *(uint32_t*)0x200006d8 = 0xe;
  ((intptr_t(*)(intptr_t, intptr_t, intptr_t))CAST(ioctl))(
      /*fd=*/r[0], /*cmd=*/0xc0384600, /*arg=*/0x200006c0);
}
int main(void)
{
  ((intptr_t(*)(intptr_t, intptr_t, intptr_t, intptr_t, intptr_t,
                intptr_t))CAST(mmap))(/*addr=*/0x20000000, /*len=*/0x1000000,
                                      /*prot=*/3, /*flags=*/0x1012, /*fd=*/-1,
                                      /*offset=*/0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}