// https://syzkaller.appspot.com/bug?id=28bc35dd6f026b2878e30804670f6f0c39932f16
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

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

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 bool write_file(const char* file, const char* what, ...)
{
  char buf[1024];
  va_list args;
  va_start(args, what);
  vsnprintf(buf, sizeof(buf), what, args);
  va_end(args);
  buf[sizeof(buf) - 1] = 0;
  int len = strlen(buf);
  int fd = open(file, O_WRONLY | O_CLOEXEC);
  if (fd == -1)
    return false;
  if (write(fd, buf, len) != len) {
    int err = errno;
    close(fd);
    errno = err;
    return false;
  }
  close(fd);
  return true;
}

static void kill_and_wait(int pid, int* status)
{
  kill(-pid, SIGKILL);
  kill(pid, SIGKILL);
  int i;
  for (i = 0; i < 100; i++) {
    if (waitpid(-1, status, WNOHANG | __WALL) == pid)
      return;
    usleep(1000);
  }
  DIR* dir = opendir("/sys/fs/fuse/connections");
  if (dir) {
    for (;;) {
      struct dirent* ent = readdir(dir);
      if (!ent)
        break;
      if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
        continue;
      char abort[300];
      snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
               ent->d_name);
      int fd = open(abort, O_WRONLY);
      if (fd == -1) {
        continue;
      }
      if (write(fd, abort, 1) < 0) {
      }
      close(fd);
    }
    closedir(dir);
  } else {
  }
  while (waitpid(-1, status, __WALL) != pid) {
  }
}

static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      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 < 5 * 1000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  memcpy((void*)0x200003c0, "./cgroup\000", 9);
  res = syscall(__NR_openat, 0xffffffffffffff9c, 0x200003c0, 0x200002, 0);
  if (res != -1)
    r[0] = res;
  syscall(__NR_fchdir, r[0]);
  memcpy((void*)0x20000080, "./file1\000", 8);
  res = syscall(__NR_creat, 0x20000080, 0);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000100, "./file1\000", 8);
  res = syscall(__NR_creat, 0x20000100, 0);
  if (res != -1)
    r[2] = res;
  memcpy((void*)0x20000280,
         "\x07\xf9\xbf\xe2\x31\x32\xe9\x7e\xbf\x82\x29\x87\xaa\x63\x2b\x7a\xa4"
         "\x36\x5b\xb1\xd1\x19\x85\x87\x5f\xa3\x8a\x15\x6e\xc5\xa7\x1d\xe7\xf7"
         "\xf2\xae\x7f\xed\xc6\xc5\xa1\x09\x2b\x34\xa0\xab\xee\xa7\x05\x80\x69"
         "\xba\x27\x76\x49\x96\xce\xc1\xd4\x3a\x86\x61\x46\x8e\x30\x9a\x62\x03"
         "\x14\x72\x91\xb5\x34\x4f\xb6\x6c\x8f\x4e\xce\x1b\x2c\xa2\xa6\x3c\x90"
         "\x73\x1a\x6f\xda\xa6\xc4\x23\x3d\x2d\x1c\x91\x68\x51\x53\xf4\xba\xfe"
         "\x5c\x4c\x39\x48\x67\x0d\xf4\xe6\x0c\x3f\x18\x78\x8c\x1a\xaf\xee\x63"
         "\x23\xc3\xa3\x88\x08\xe0\x02\x18\x4a\x12\x7a\xde\x01\xdf\xc3\xfb\x18"
         "\x79\x0f\xc5\xd7\xf6\x0e\xec\x06\xdb\xdb\xc9\x59\xa2\x52\x6b\x7f\x59"
         "\xa7\xcf\xa5\x67\xa6\xba\xc2\x7e\x3c\x1a\x39\x29\x5a\x7c\xb6\x11\x67"
         "\xaf\xb2\xbb\x1b\xd5\xc0\x8e\x6b\xb7\xec\xe5\x11\x34\xce\xf2\xca\xfd"
         "\x44\x2a\x90\x48\x9e\x96\xa4\x4c\x33\x69\x56\x9f\x09\xbb\x83\xd5\xb0"
         "\x55\x3d\xe1\x7f\xc4\x73\x2b\x29\x26\x0b\x8d\xa4\x11\xe6\x93\xb3\x73"
         "\xc6\x76\x85\xa1\x26\x0e\x06\x5b\x80\x0f\xda\xc8\x93\x5b\x42\xb9\xbc"
         "\xf7\x4d\x45\x24\xd4\x6c\xa3\xb3\xa0\x3b\x5b\xf6\x25\xda\x10\x58\xc3"
         "\x60\x60\xe9\xac\x49\x9a\x22\xec\xf7\x4d\x0c\x2e\x0e\x76\x66\x23\x03"
         "\x99\x90\x8d\x90\x76\x8a\x87\x15\xe3\x7d\xde\x93\x0c\xf1\xfc\x35\xf0"
         "\x7b\x5d\x58\x8e\xcf",
         294);
  syscall(__NR_write, r[2], 0x20000280, 1);
  syscall(__NR_fallocate, r[2], 0x20, 0, 0x80000008000);
  syscall(__NR_lseek, r[1], 0, 3);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  loop();
  return 0;
}