// https://syzkaller.appspot.com/bug?id=40ba6706cc749e6df21236a0da62fcfaa4f0e4f4
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

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 __syscall syscall

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;
  NONFAILING(*(uint32_t*)0x20000240 = 0);
  NONFAILING(*(uint32_t*)0x20000244 = 0);
  NONFAILING(*(uint64_t*)0x20000248 = 0);
  NONFAILING(*(uint64_t*)0x20000250 = 0);
  NONFAILING(*(uint64_t*)0x20000258 = 0);
  NONFAILING(*(uint64_t*)0x20000260 = 0);
  NONFAILING(*(uint64_t*)0x20000268 = 0);
  NONFAILING(*(uint64_t*)0x20000270 = 0);
  NONFAILING(*(uint64_t*)0x20000278 = 0);
  NONFAILING(*(uint64_t*)0x20000280 = 0);
  NONFAILING(*(uint64_t*)0x20000288 = 0);
  NONFAILING(*(uint64_t*)0x20000290 = 0);
  NONFAILING(*(uint64_t*)0x20000298 = 0);
  NONFAILING(*(uint64_t*)0x200002a0 = 0);
  NONFAILING(*(uint64_t*)0x200002a8 = 0);
  NONFAILING(*(uint64_t*)0x200002b0 = 0);
  NONFAILING(*(uint64_t*)0x200002b8 = 0);
  NONFAILING(*(uint64_t*)0x200002c0 = 0);
  NONFAILING(*(uint64_t*)0x200002c8 = 0);
  NONFAILING(*(uint64_t*)0x200002d0 = 0);
  NONFAILING(*(uint64_t*)0x200002d8 = 0);
  NONFAILING(*(uint64_t*)0x200002e0 = 0);
  NONFAILING(*(uint64_t*)0x200002e8 = 0);
  NONFAILING(*(uint64_t*)0x200002f0 = 0);
  NONFAILING(*(uint64_t*)0x200002f8 = 0);
  NONFAILING(*(uint64_t*)0x20000300 = 7);
  NONFAILING(*(uint64_t*)0x20000308 = -1);
  NONFAILING(*(uint64_t*)0x20000310 = 0);
  NONFAILING(*(uint64_t*)0x20000318 = 0);
  NONFAILING(*(uint64_t*)0x20000320 = 0);
  NONFAILING(*(uint64_t*)0x20000328 = 0);
  NONFAILING(*(uint64_t*)0x20000330 = 0);
  NONFAILING(*(uint64_t*)0x20000338 = 0);
  NONFAILING(*(uint64_t*)0x20000340 = 0);
  NONFAILING(*(uint64_t*)0x20000348 = 0);
  NONFAILING(*(uint64_t*)0x20000350 = 0);
  NONFAILING(*(uint64_t*)0x20000358 = 0);
  NONFAILING(*(uint64_t*)0x20000360 = 0);
  NONFAILING(*(uint64_t*)0x20000368 = 0);
  NONFAILING(*(uint64_t*)0x20000370 = 0);
  NONFAILING(*(uint64_t*)0x20000378 = 0);
  NONFAILING(*(uint64_t*)0x20000380 = 0);
  NONFAILING(*(uint64_t*)0x20000388 = 0);
  NONFAILING(*(uint16_t*)0x20000390 = 0);
  NONFAILING(*(uint32_t*)0x20000394 = 0);
  NONFAILING(*(uint32_t*)0x20000398 = 0);
  NONFAILING(*(uint64_t*)0x200003a0 = 0);
  NONFAILING(*(uint16_t*)0x200003a8 = 0);
  NONFAILING(*(uint32_t*)0x200003ac = 0);
  NONFAILING(*(uint32_t*)0x200003b0 = 0);
  NONFAILING(*(uint64_t*)0x200003b8 = 0);
  NONFAILING(*(uint16_t*)0x200003c0 = 0);
  NONFAILING(*(uint32_t*)0x200003c4 = 0);
  NONFAILING(*(uint32_t*)0x200003c8 = 0);
  NONFAILING(*(uint64_t*)0x200003d0 = 0);
  NONFAILING(*(uint16_t*)0x200003d8 = 0);
  NONFAILING(*(uint32_t*)0x200003dc = 0);
  NONFAILING(*(uint32_t*)0x200003e0 = 0);
  NONFAILING(*(uint64_t*)0x200003e8 = 0);
  NONFAILING(*(uint16_t*)0x200003f0 = 0);
  NONFAILING(*(uint32_t*)0x200003f4 = 0);
  NONFAILING(*(uint32_t*)0x200003f8 = 0);
  NONFAILING(*(uint64_t*)0x20000400 = 0);
  NONFAILING(*(uint16_t*)0x20000408 = 0);
  NONFAILING(*(uint32_t*)0x2000040c = 0);
  NONFAILING(*(uint32_t*)0x20000410 = 0);
  NONFAILING(*(uint64_t*)0x20000418 = 0);
  NONFAILING(*(uint16_t*)0x20000420 = 0);
  NONFAILING(*(uint32_t*)0x20000424 = 0);
  NONFAILING(*(uint32_t*)0x20000428 = 0);
  NONFAILING(*(uint64_t*)0x20000430 = 0);
  NONFAILING(*(uint16_t*)0x20000438 = 0);
  NONFAILING(*(uint32_t*)0x2000043c = 0);
  NONFAILING(*(uint32_t*)0x20000440 = 0);
  NONFAILING(*(uint64_t*)0x20000448 = 0);
  NONFAILING(*(uint16_t*)0x20000450 = 0);
  NONFAILING(*(uint32_t*)0x20000454 = 0);
  NONFAILING(*(uint32_t*)0x20000458 = 0);
  NONFAILING(*(uint64_t*)0x20000460 = 0);
  NONFAILING(*(uint16_t*)0x20000468 = 0);
  NONFAILING(*(uint32_t*)0x2000046c = 0);
  NONFAILING(*(uint32_t*)0x20000470 = 0);
  NONFAILING(*(uint64_t*)0x20000478 = 0);
  syscall(SYS_ioctl, -1, 0x82405605ul, 0x20000240ul);
  syscall(SYS_socket, 1ul, 2ul, 0);
  syscall(SYS_pipe, 0x20000140ul);
  {
    int i;
    for (i = 0; i < 64; i++) {
      syscall(SYS_pipe, 0x20000140ul);
    }
  }
  res = syscall(SYS_kqueue);
  if (res != -1)
    r[0] = res;
  res = syscall(SYS_dup, r[0]);
  if (res != -1)
    r[1] = res;
  syscall(SYS_fcntl, -1, 0ul, -1);
  NONFAILING(*(uint32_t*)0x200000c0 = r[1]);
  NONFAILING(*(uint16_t*)0x200000c8 = -1);
  NONFAILING(*(uint16_t*)0x200000ca = 0x103);
  NONFAILING(*(uint32_t*)0x200000cc = 0);
  NONFAILING(*(uint64_t*)0x200000d0 = 0);
  NONFAILING(*(uint64_t*)0x200000d8 = 0);
  syscall(SYS_kevent, r[0], 0x200000c0ul, 0x81, 0ul, 0x401, 0ul);
}
int main(void)
{
  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul);
  install_segv_handler();
  use_temporary_dir();
  do_sandbox_none();
  return 0;
}