// https://syzkaller.appspot.com/bug?id=ebdd919d6b0b31f25602378e9f934129e122e808
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

unsigned long long procid;

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

uint64_t current_time_ms()
{
  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()
{
  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 setup_common()
{
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();
  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 160 << 20;
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 136 << 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);
  if (unshare(CLONE_NEWNS)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(0x02000000)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
}

int wait_for_loop(int pid)
{
  if (pid < 0)
    exit(1);
  int status = 0;
  while (waitpid(-1, &status, __WALL) != pid) {
  }
  return WEXITSTATUS(status);
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid != 0)
    return wait_for_loop(pid);
  setup_common();
  sandbox_common();
  if (unshare(CLONE_NEWNET)) {
  }
  loop();
  exit(1);
}

static void remove_dir(const char* dir)
{
  DIR* dp;
  struct dirent* ep;
  int iter = 0;
retry:
  while (umount2(dir, MNT_DETACH) == 0) {
  }
  dp = opendir(dir);
  if (dp == NULL) {
    if (errno == EMFILE) {
      exit(1);
    }
    exit(1);
  }
  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);
    while (umount2(filename, MNT_DETACH) == 0) {
    }
    struct stat st;
    if (lstat(filename, &st))
      exit(1);
    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)
        exit(1);
      if (umount2(filename, MNT_DETACH))
        exit(1);
    }
  }
  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))
          exit(1);
        continue;
      }
      if (errno == ENOTEMPTY) {
        if (iter < 100) {
          iter++;
          goto retry;
        }
      }
    }
    exit(1);
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

static void execute_one();

#define WAIT_FLAGS __WALL

static void loop()
{
  int iter;
  for (iter = 0;; 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) {
      setup_test();
      if (chdir(cwdbuf))
        exit(1);
      execute_one();
      reset_test();
      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 < 5 * 1000)
        continue;
      kill(-pid, SIGKILL);
      kill(pid, SIGKILL);
      while (waitpid(-1, &status, WAIT_FLAGS) != pid) {
      }
      break;
    }
    remove_dir(cwdbuf);
  }
}

uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one()
{
  long res = 0;
  memcpy((void*)0x20000000, "memory.events", 14);
  res = syscall(__NR_openat, 0xffffff9c, 0x20000000, 0x26e1, 0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x20000100 = 0x17e;
  *(uint32_t*)0x20000104 = 0;
  *(uint32_t*)0x20000108 = 0;
  *(uint32_t*)0x2000010c = 0;
  *(uint32_t*)0x20000110 = 0;
  *(uint64_t*)0x20000118 = 0;
  syscall(__NR_ioctl, r[0], 0x40086602, 0x20000100);
  res = syscall(__NR_socket, 0xa, 2, 0);
  if (res != -1)
    r[1] = res;
  res = syscall(__NR_socket, 0xf, 3, 2);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x20000140 = 0;
  *(uint32_t*)0x20000148 = 0;
  *(uint64_t*)0x20000150 = 0x20000100;
  *(uint64_t*)0x20000100 = 0x20000000;
  *(uint8_t*)0x20000000 = 2;
  *(uint8_t*)0x20000001 = 7;
  *(uint8_t*)0x20000002 = 0;
  *(uint8_t*)0x20000003 = 8;
  *(uint16_t*)0x20000004 = 2;
  *(uint16_t*)0x20000006 = 0;
  *(uint32_t*)0x20000008 = 0;
  *(uint32_t*)0x2000000c = 0;
  *(uint64_t*)0x20000108 = 0x10;
  *(uint64_t*)0x20000158 = 1;
  *(uint64_t*)0x20000160 = 0;
  *(uint64_t*)0x20000168 = 0;
  *(uint32_t*)0x20000170 = 0;
  syscall(__NR_sendmsg, r[2], 0x20000140, 0);
  *(uint64_t*)0x20000200 = htobe64(0);
  *(uint64_t*)0x20000208 = htobe64(1);
  *(uint32_t*)0x20000210 = htobe32(0xe0000002);
  *(uint16_t*)0x20000220 = htobe16(0);
  *(uint16_t*)0x20000222 = htobe16(0);
  *(uint16_t*)0x20000224 = htobe16(0);
  *(uint16_t*)0x20000226 = htobe16(0);
  *(uint16_t*)0x20000228 = 2;
  *(uint8_t*)0x2000022a = 0;
  *(uint8_t*)0x2000022b = 0;
  *(uint8_t*)0x2000022c = 0;
  *(uint32_t*)0x20000230 = 0;
  *(uint32_t*)0x20000234 = 0;
  *(uint64_t*)0x20000238 = 0;
  *(uint64_t*)0x20000240 = 0;
  *(uint64_t*)0x20000248 = 0;
  *(uint64_t*)0x20000250 = 0;
  *(uint64_t*)0x20000258 = 0;
  *(uint64_t*)0x20000260 = 0;
  *(uint64_t*)0x20000268 = 0;
  *(uint64_t*)0x20000270 = 0;
  *(uint64_t*)0x20000278 = 0;
  *(uint64_t*)0x20000280 = 0;
  *(uint64_t*)0x20000288 = 0;
  *(uint64_t*)0x20000290 = 0;
  *(uint32_t*)0x20000298 = 0;
  *(uint32_t*)0x2000029c = 0;
  *(uint8_t*)0x200002a0 = 1;
  *(uint8_t*)0x200002a1 = 0;
  *(uint8_t*)0x200002a2 = 0;
  *(uint8_t*)0x200002a3 = 0;
  *(uint32_t*)0x200002a8 = htobe32(0xe0000001);
  *(uint32_t*)0x200002b8 = htobe32(0);
  *(uint8_t*)0x200002bc = 0x2b;
  *(uint16_t*)0x200002c0 = 0;
  *(uint8_t*)0x200002c4 = 0xfe;
  *(uint8_t*)0x200002c5 = 0x80;
  *(uint8_t*)0x200002c6 = 0;
  *(uint8_t*)0x200002c7 = 0;
  *(uint8_t*)0x200002c8 = 0;
  *(uint8_t*)0x200002c9 = 0;
  *(uint8_t*)0x200002ca = 0;
  *(uint8_t*)0x200002cb = 0;
  *(uint8_t*)0x200002cc = 0;
  *(uint8_t*)0x200002cd = 0;
  *(uint8_t*)0x200002ce = 0;
  *(uint8_t*)0x200002cf = 0;
  *(uint8_t*)0x200002d0 = 0;
  *(uint8_t*)0x200002d1 = 0;
  *(uint8_t*)0x200002d2 = 0;
  *(uint8_t*)0x200002d3 = 0;
  *(uint32_t*)0x200002d4 = 0;
  *(uint8_t*)0x200002d8 = 0;
  *(uint8_t*)0x200002d9 = 0;
  *(uint8_t*)0x200002da = 1;
  *(uint32_t*)0x200002dc = 0;
  *(uint32_t*)0x200002e0 = 0;
  *(uint32_t*)0x200002e4 = 0;
  syscall(__NR_setsockopt, r[1], 0x29, 0x23, 0x20000200, 0xe8);
  *(uint64_t*)0x20002000 = 0x20000740;
  *(uint16_t*)0x20000740 = 2;
  *(uint16_t*)0x20000742 = htobe16(0xc67a);
  *(uint32_t*)0x20000744 = htobe32(0);
  *(uint8_t*)0x20000748 = 0;
  *(uint8_t*)0x20000749 = 0;
  *(uint8_t*)0x2000074a = 0;
  *(uint8_t*)0x2000074b = 0;
  *(uint8_t*)0x2000074c = 0;
  *(uint8_t*)0x2000074d = 0;
  *(uint8_t*)0x2000074e = 0;
  *(uint8_t*)0x2000074f = 0;
  *(uint32_t*)0x20002008 = 0x80;
  *(uint64_t*)0x20002010 = 0x20000600;
  *(uint64_t*)0x20002018 = 0;
  *(uint64_t*)0x20002020 = 0x20000280;
  *(uint64_t*)0x20002028 = 0;
  *(uint32_t*)0x20002030 = 0;
  *(uint32_t*)0x20002038 = 0;
  syscall(__NR_sendmmsg, r[1], 0x20002000, 1, 0);
}
int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      use_temporary_dir();
      do_sandbox_none();
    }
  }
  sleep(1000000);
  return 0;
}