// https://syzkaller.appspot.com/bug?id=8d094d6bc5fba75ff8d065959e44152c39e58690
// 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);
  for (int 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 = 0;
  for (;; 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 < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 0x21ul, 2ul, 2);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000000 = 0x20000080;
  *(uint16_t*)0x20000080 = 0x21;
  *(uint16_t*)0x20000082 = 0;
  *(uint16_t*)0x20000084 = 2;
  *(uint16_t*)0x20000086 = 0x10;
  *(uint16_t*)0x20000088 = 2;
  *(uint16_t*)0x2000008a = htobe16(0x4e22);
  *(uint8_t*)0x2000008c = 0xac;
  *(uint8_t*)0x2000008d = 0x14;
  *(uint8_t*)0x2000008e = 0x14;
  *(uint8_t*)0x2000008f = 0x46;
  *(uint32_t*)0x20000008 = 0x80;
  *(uint64_t*)0x20000010 = 0;
  *(uint64_t*)0x20000018 = 0;
  *(uint64_t*)0x20000020 = 0x20001a00;
  memcpy((void*)0x20001a00,
         "\x18\x00\x00\x00\x00\x00\x00\x00\x10\x01\x00\x00\x01\x00\x00\x00\x7d"
         "\x95\xdf\x16\xa3\x9b\x1a\x6c\x90\x00\x00\x00\x00\x00\x00\x00\x01\x00"
         "\x00\x00\x04\x05\x00\x00\x2b\x24\xec\x10\x06\x4b\x6f\x2f\x01\x00\x01"
         "\x00\x71\x8a\xef\x93\x2f\x38\x89\xd1\xfd\xda\x5b\x00\x00\x00\x01\x86"
         "\x0f\x58\x78\xc3\x7f\xfe\x36\xe1\x16\x5d\x14\xd4\x35\xbe\x5b\x31\x7c"
         "\x6c\x81\x89\x76\x7d\x2f\x97\x87\x9f\x07\xa5\x15\xbb\x7c\x16\x9f\x46"
         "\x93\x3d\x93\x38\xf4\xab\x04\x83\x69\x6f\x61\x89\x88\xc5\x94\x47\x41"
         "\xaf\xe4\x03\x46\x13\x23\x11\x0f\x62\x05\x53\x94\x41\x21\x58\xe7\xa3"
         "\xad\xb1\x64\xd6\x41\xaa\x40\xd4\xab\x07\x7f\xe3\x42\x32\xaa\x8b\x31"
         "\x9d\x76\x66\xd0\x99\x8a\x61\xd7\xda\x0c\x86\xd7\x00\x00\x00\x10\x10",
         170);
  *(uint64_t*)0x20000028 = 0x10b8;
  *(uint32_t*)0x20000030 = 4;
  syscall(__NR_sendmsg, r[0], 0x20000000ul, 0ul);
  syscall(__NR_sendmsg, r[0], 0ul, 0x186ul);
}
int main(void)
{
  syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
  syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
  loop();
  return 0;
}