// https://syzkaller.appspot.com/bug?id=6fba8c186d97cf1011ab17660e633b1cc4e080c9
// 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 long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf) - 1);
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

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

void execute_one(void)
{
  intptr_t res = 0;
  res = syz_open_dev(0xc, 4, 1);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20001780 = 0x20000780;
  memcpy((void*)0x20000780,
         "\x7f\xbb\x97\xbd\x77\x27\xd3\xde\xb5\x49\xa8\x55\x6b\xfa\x7c\xa9\x1b"
         "\xce\xd2\x91\x4b\x4a\x35\x3e\x61\x48\x0d\xc2\xb0\xb2\xc3\xbd\x8f\xf6"
         "\x3d\xc9\xfe\xa0\xe6\xcc\x61\xfe\x96\x4f\x32\x0a\xd7\x5c\xa7\xe7\x66"
         "\xda\xc5\x59\xb8\x37\x6b\xa1\x9f\x0b\xae\xd2\xd4\x80\x36\x2a\xd6\x5e"
         "\xd2\x56\xdd\xe6\x65\x94\x67\x19\x7b\xd0\xe6\x70\xfe\x3e\x35\x2b\x9b"
         "\x5c\x9c\x0e\xd0\x2c\x8d\xed\xea\xe6\x00\x39\xab\xc7\x8a\x97\x5e\xf3"
         "\x86\x10\xcc\xe6\xee\xdb\x05\x1e\x1f\xb4\x07\x5e\x6c\x1c\x76\xd0\xeb"
         "\x70\x8d\xa4\x86\x94\x32\x81\x86\x8c\x7d\x13\xf4\x66\x57\xc6\x1d\x3f"
         "\xd1\xc5\xac\xe4\xae\x29\x3b\x98\x32\x85\x72\x8c\x76\x6a\x0c\xc7\x78"
         "\x7e\x26\xc1\x11\x6d\x5f\x81\x63\x9c\xf3\xe1\x8f\x1b\x4a\x4e\x04\x0f"
         "\xc3\xae\xc7\x38\x1a\x77\x53\x40\x32\x90\x21\x31\xf4\x52\x97\x9e\xf1"
         "\x16\x9e\x5b\x03\xc4\x74\x21\xb5\xa8\x13\xb9\xbb\x39\xa5\x3f\xa9\x29"
         "\x9a\x2d\x8f\xe6\xeb\x5c\xc9\xdf\x6d\x2e\x66\xde\x77\x68\x12\x79\x8c"
         "\x75\xc9\x63\xb2\xd7",
         226);
  *(uint64_t*)0x20001788 = 0xe2;
  syscall(__NR_writev, r[0], 0x20001780ul, 1ul);
  res = syz_open_dev(0xc, 4, 1);
  if (res != -1)
    r[1] = res;
  *(uint16_t*)0x20000200 = 0;
  *(uint16_t*)0x20000202 = 0x1000;
  *(uint16_t*)0x20000204 = 0;
  *(uint16_t*)0x20000206 = 0x20;
  *(uint16_t*)0x20000208 = 1;
  *(uint16_t*)0x2000020a = 0;
  syscall(__NR_ioctl, r[1], 0x560aul, 0x20000200ul);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0);
  loop();
  return 0;
}