// https://syzkaller.appspot.com/bug?id=ff1010c7eb802434fa13f8a03fdf6752d043c77c
// 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");
}

#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[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0xa, 5, 0x84);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20002c00 = 0x20000940;
  *(uint16_t*)0x20000940 = 1;
  *(uint8_t*)0x20000942 = 0;
  *(uint32_t*)0x20000944 = 0x4e21;
  *(uint32_t*)0x20002c08 = 0x6e;
  *(uint64_t*)0x20002c10 = 0;
  *(uint64_t*)0x20002c18 = 0;
  *(uint64_t*)0x20002c20 = 0;
  *(uint64_t*)0x20002c28 = 0;
  *(uint32_t*)0x20002c30 = 0x84;
  syscall(__NR_sendmsg, r[0], 0x20002c00, 0x20000000);
  *(uint16_t*)0x20002c40 = 2;
  *(uint16_t*)0x20002c42 = htobe16(0x4e22);
  *(uint32_t*)0x20002c44 = htobe32(0);
  *(uint16_t*)0x20002c50 = 2;
  *(uint16_t*)0x20002c52 = htobe16(0x4e20);
  *(uint32_t*)0x20002c54 = htobe32(1);
  *(uint16_t*)0x20002c60 = 0xa;
  *(uint16_t*)0x20002c62 = htobe16(0x4e21);
  *(uint32_t*)0x20002c64 = htobe32(6);
  *(uint8_t*)0x20002c68 = 0;
  *(uint8_t*)0x20002c69 = 0;
  *(uint8_t*)0x20002c6a = 0;
  *(uint8_t*)0x20002c6b = 0;
  *(uint8_t*)0x20002c6c = 0;
  *(uint8_t*)0x20002c6d = 0;
  *(uint8_t*)0x20002c6e = 0;
  *(uint8_t*)0x20002c6f = 0;
  *(uint8_t*)0x20002c70 = 0;
  *(uint8_t*)0x20002c71 = 0;
  *(uint8_t*)0x20002c72 = -1;
  *(uint8_t*)0x20002c73 = -1;
  *(uint8_t*)0x20002c74 = 0xac;
  *(uint8_t*)0x20002c75 = 0x1e;
  *(uint8_t*)0x20002c76 = 1;
  *(uint8_t*)0x20002c77 = 1;
  *(uint32_t*)0x20002c78 = 8;
  *(uint16_t*)0x20002c7c = 0xa;
  *(uint16_t*)0x20002c7e = htobe16(0x4e22);
  *(uint32_t*)0x20002c80 = htobe32(0x8000);
  *(uint8_t*)0x20002c84 = 0;
  *(uint8_t*)0x20002c85 = 0;
  *(uint8_t*)0x20002c86 = 0;
  *(uint8_t*)0x20002c87 = 0;
  *(uint8_t*)0x20002c88 = 0;
  *(uint8_t*)0x20002c89 = 0;
  *(uint8_t*)0x20002c8a = 0;
  *(uint8_t*)0x20002c8b = 0;
  *(uint8_t*)0x20002c8c = 0;
  *(uint8_t*)0x20002c8d = 0;
  *(uint8_t*)0x20002c8e = 0;
  *(uint8_t*)0x20002c8f = 0;
  *(uint8_t*)0x20002c90 = 0;
  *(uint8_t*)0x20002c91 = 0;
  *(uint8_t*)0x20002c92 = 0;
  *(uint8_t*)0x20002c93 = 0;
  *(uint32_t*)0x20002c94 = 0x1f;
  *(uint16_t*)0x20002c98 = 2;
  *(uint16_t*)0x20002c9a = htobe16(0x4e22);
  *(uint32_t*)0x20002c9c = htobe32(0xe0000001);
  *(uint16_t*)0x20002ca8 = 0xa;
  *(uint16_t*)0x20002caa = htobe16(0x4e20);
  *(uint32_t*)0x20002cac = htobe32(0x8000);
  *(uint8_t*)0x20002cb0 = -1;
  *(uint8_t*)0x20002cb1 = 1;
  *(uint8_t*)0x20002cb2 = 0;
  *(uint8_t*)0x20002cb3 = 0;
  *(uint8_t*)0x20002cb4 = 0;
  *(uint8_t*)0x20002cb5 = 0;
  *(uint8_t*)0x20002cb6 = 0;
  *(uint8_t*)0x20002cb7 = 0;
  *(uint8_t*)0x20002cb8 = 0;
  *(uint8_t*)0x20002cb9 = 0;
  *(uint8_t*)0x20002cba = 0;
  *(uint8_t*)0x20002cbb = 0;
  *(uint8_t*)0x20002cbc = 0;
  *(uint8_t*)0x20002cbd = 0;
  *(uint8_t*)0x20002cbe = 0;
  *(uint8_t*)0x20002cbf = 1;
  *(uint32_t*)0x20002cc0 = 8;
  syscall(__NR_setsockopt, r[0], 0x84, 0x64, 0x20002c40, 0x84);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  setup_leak();
  loop();
  return 0;
}