// https://syzkaller.appspot.com/bug?id=2995483a2e379c98732c3d3ec2db746e460f2444
// 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 unsigned long long procid;

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");
}

#define KMEMLEAK_FILE "/sys/kernel/debug/kmemleak"

static void setup_leak()
{
  if (!write_file(KMEMLEAK_FILE, "scan"))
    exit(1);
  sleep(5);
  if (!write_file(KMEMLEAK_FILE, "scan"))
    exit(1);
  if (!write_file(KMEMLEAK_FILE, "clear"))
    exit(1);
}

static void check_leaks(void)
{
  int fd = open(KMEMLEAK_FILE, O_RDWR);
  if (fd == -1)
    exit(1);
  uint64_t start = current_time_ms();
  if (write(fd, "scan", 4) != 4)
    exit(1);
  sleep(1);
  while (current_time_ms() - start < 4 * 1000)
    sleep(1);
  if (write(fd, "scan", 4) != 4)
    exit(1);
  static char buf[128 << 10];
  ssize_t n = read(fd, buf, sizeof(buf) - 1);
  if (n < 0)
    exit(1);
  int nleaks = 0;
  if (n != 0) {
    sleep(1);
    if (write(fd, "scan", 4) != 4)
      exit(1);
    if (lseek(fd, 0, SEEK_SET) < 0)
      exit(1);
    n = read(fd, buf, sizeof(buf) - 1);
    if (n < 0)
      exit(1);
    buf[n] = 0;
    char* pos = buf;
    char* end = buf + n;
    while (pos < end) {
      char* next = strstr(pos + 1, "unreferenced object");
      if (!next)
        next = end;
      char prev = *next;
      *next = 0;
      fprintf(stderr, "BUG: memory leak\n%s\n", pos);
      *next = prev;
      pos = next;
      nleaks++;
    }
  }
  if (write(fd, "clear", 5) != 5)
    exit(1);
  close(fd);
  if (nleaks)
    exit(1);
}

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;
    }
    check_leaks();
  }
}

uint64_t r[4] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_pipe2, 0x20000240ul, 0ul);
  if (res != -1) {
    r[0] = *(uint32_t*)0x20000240;
    r[1] = *(uint32_t*)0x20000244;
  }
  memcpy((void*)0x20000100, "./file0\000", 8);
  syscall(__NR_mkdir, 0x20000100ul, 0ul);
  memcpy((void*)0x20000680,
         "\x15\x00\x00\x00\x65\xff\xff\x01\x80\x00\x00\x08\x00\x39\x50\x32\x30"
         "\x30\x30\x2e\x75\xd9\x08\xc9\x20\x5e\xd3\xb7\x1e\xa1\x39\x52\xfe\x4c"
         "\xbe\x6f\xe9\x48\x15\xd4\x29\x6f\x6e\x66\xde\x94\xf4\x2c\xfa\x66\x86"
         "\x25\x35\x18\x8b\xc7\x31\x14\xcc\x5b\x7e\x45\xad\xbc\x96\xad\xa2\xc9"
         "\x6f\xcd\xf5\x6a\xc7\xd8\xc5\xdf\x0d\x62\x17\xf0\x49\x41\x34\x54\xc4"
         "\x71\xde\x84\x0c\xdf\x46\x2e\x7b\x21\xaf\x76\xc2\xdd\x85\xcf\xd2\xaf"
         "\x27\x51\x32\xf7\x8a\x7a\x2a\x40\x78\x4f\x2c\x84\x8c\xfe\x3e\x12\x0e"
         "\xa0\x12\x4e\xe0\x7f\xab\xe1\xab\x30\x35\x5d\x1d\xa3\x79\x2e\xd0\x37"
         "\x34\xc9\xd2\x31\x1b\x8c\x49\x21\x41\xe4\x9b\xbd\x12\x98\x84\x25\xf3"
         "\xe6\x41\x6d\x98\x39\x7d\x0c\x77\x2f\x66\x62\x5b\x09\x84\xa4\x11\x11"
         "\xe8\x65\x5d\xe4\xc8\x7c\x3f\xfc\x5a\x61\x20\x04\xb1\x91\x58\x17\x4c"
         "\x2f\x52\x68\x0b\x3b\xf2\xe4\x18\xbc\x4e\x9b\x4a\x0b\x87\x3e\x7f\x69"
         "\x26\x10\x2d\x5c\xc7\xe6\xee\xbb\x2a\x84\x07\xb6\x84\x60\x7e\x44\x1c"
         "\xa5\x2e\xab\xfe\xca\x04\x02\x54\xd8\x7b\x62\x7d\xe2\x5f\x8e\x68\x99"
         "\xde\x16\x1d\x19\x94\x68",
         244);
  syscall(__NR_write, r[1], 0x20000680ul, 0x15ul);
  res = syscall(__NR_dup, r[1]);
  if (res != -1)
    r[2] = res;
  *(uint32_t*)0x200000c0 = 0x14c;
  *(uint32_t*)0x200000c4 = 5;
  *(uint64_t*)0x200000c8 = 0;
  *(uint64_t*)0x200000d0 = 0;
  *(uint64_t*)0x200000d8 = 0;
  *(uint64_t*)0x200000e0 = 0;
  *(uint32_t*)0x200000e8 = 0;
  *(uint32_t*)0x200000ec = 0;
  syscall(__NR_write, r[2], 0x200000c0ul, 0x26ful);
  memcpy((void*)0x20000040, "/dev/vcs#\000", 10);
  res = syz_open_dev(0x20000040, 0xc4, 1);
  if (res != -1)
    r[3] = res;
  memcpy((void*)0x20000140, "./file0\000", 8);
  memcpy((void*)0x20000180, "9p\000", 3);
  memcpy((void*)0x20000540, "trans=fd,", 9);
  memcpy((void*)0x20000549, "rfdno", 5);
  *(uint8_t*)0x2000054e = 0x3d;
  sprintf((char*)0x2000054f, "0x%016llx", (long long)r[0]);
  *(uint8_t*)0x20000561 = 0x2c;
  memcpy((void*)0x20000562, "wfdno", 5);
  *(uint8_t*)0x20000567 = 0x3d;
  sprintf((char*)0x20000568, "0x%016llx", (long long)r[3]);
  *(uint8_t*)0x2000057a = 0x2c;
  memcpy((void*)0x2000057b, "cachetag", 8);
  *(uint8_t*)0x20000583 = 0x3d;
  memcpy((void*)0x20000584, "eth1nodevvboxnet0", 17);
  *(uint8_t*)0x20000595 = 0x2c;
  *(uint8_t*)0x20000596 = 0;
  syscall(__NR_mount, 0ul, 0x20000140ul, 0x20000180ul, 0ul, 0x20000540ul);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0ul);
  setup_leak();
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}