// https://syzkaller.appspot.com/bug?id=645f06d8747346b61bd90a5a3a23e2f33d7f0d6f
// 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 <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>

unsigned long long procid;

static void sleep_ms(uint64_t ms)
{
  usleep(ms * 1000);
}

static uint64_t current_time_ms()
{
  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 long syz_open_procfs(long a0, long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == -1) {
    snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1);
  } else {
    snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1);
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  return fd;
}

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) {
  }
}

#define SYZ_HAVE_SETUP_TEST 1
static void setup_test()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
}

#define SYZ_HAVE_RESET_TEST 1
static void reset_test()
{
  int fd;
  for (fd = 3; fd < 30; fd++)
    close(fd);
}

static void execute_one();

#define WAIT_FLAGS __WALL

static void loop()
{
  int iter;
  for (iter = 0;; iter++) {
    int pid = fork();
    if (pid < 0)
      exit(1);
    if (pid == 0) {
      setup_test();
      execute_one();
      reset_test();
      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[6] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};

void execute_one()
{
  long res = 0;
  res = syscall(__NR_socket, 0x26, 5, 0);
  if (res != -1)
    r[0] = res;
  *(uint16_t*)0x20000100 = 0x26;
  memcpy((void*)0x20000102,
         "\x68\x61\x73\x68\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 14);
  *(uint32_t*)0x20000110 = 0;
  *(uint32_t*)0x20000114 = 0;
  memcpy((void*)0x20000118,
         "\x73\x68\x61\x35\x31\x32\x5f\x6d\x62\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         64);
  syscall(__NR_bind, r[0], 0x20000100, 0x58);
  *(uint32_t*)0x200000c0 = 0;
  res = syscall(__NR_accept4, r[0], 0, 0x200000c0, 0);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000000, "net/ipv6_route", 15);
  res = syz_open_procfs(0, 0x20000000);
  if (res != -1)
    r[2] = res;
  *(uint64_t*)0x200002c0 = 0x300;
  syscall(__NR_sendfile, r[1], r[2], 0x200002c0, 0xf6a);
  res = syscall(__NR_socket, 0x26, 5, 0);
  if (res != -1)
    r[3] = res;
  *(uint16_t*)0x20000100 = 0x26;
  memcpy((void*)0x20000102,
         "\x68\x61\x73\x68\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 14);
  *(uint32_t*)0x20000110 = 0;
  *(uint32_t*)0x20000114 = 0;
  memcpy((void*)0x20000118,
         "\x73\x68\x61\x35\x31\x32\x5f\x6d\x62\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00",
         64);
  syscall(__NR_bind, r[3], 0x20000100, 0x58);
  *(uint32_t*)0x200000c0 = 0;
  res = syscall(__NR_accept4, r[3], 0, 0x200000c0, 0);
  if (res != -1)
    r[4] = res;
  memcpy((void*)0x20000000, "net/ipv6_route", 15);
  res = syz_open_procfs(0, 0x20000000);
  if (res != -1)
    r[5] = res;
  *(uint64_t*)0x200002c0 = 0;
  syscall(__NR_sendfile, r[4], r[5], 0x200002c0, 0x2ee);
  *(uint32_t*)0x200000c0 = 0;
  syscall(__NR_accept4, -1, 0, 0x200000c0, 0);
  *(uint32_t*)0x200000c0 = 0;
  syscall(__NR_accept4, -1, 0, 0x200000c0, 0);
  *(uint64_t*)0x200002c0 = 0;
  syscall(__NR_sendfile, -1, -1, 0x200002c0, 0xbcd);
  *(uint64_t*)0x200002c0 = 0;
  syscall(__NR_sendfile, -1, -1, 0x200002c0, 0x9f8);
  *(uint64_t*)0x200002c0 = 0;
  syscall(__NR_sendfile, -1, -1, 0x200002c0, 0x80008);
}
int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}