// https://syzkaller.appspot.com/bug?id=286166aa4744abfe4a5d2b5f6eb4796575004992
// 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/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/genetlink.h>
#include <linux/netlink.h>

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 long syz_genetlink_get_family_id(long name)
{
  char buf[512] = {0};
  struct nlmsghdr* hdr = (struct nlmsghdr*)buf;
  struct genlmsghdr* genlhdr = (struct genlmsghdr*)NLMSG_DATA(hdr);
  struct nlattr* attr = (struct nlattr*)(genlhdr + 1);
  hdr->nlmsg_len =
      sizeof(*hdr) + sizeof(*genlhdr) + sizeof(*attr) + GENL_NAMSIZ;
  hdr->nlmsg_type = GENL_ID_CTRL;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
  genlhdr->cmd = CTRL_CMD_GETFAMILY;
  attr->nla_type = CTRL_ATTR_FAMILY_NAME;
  attr->nla_len = sizeof(*attr) + GENL_NAMSIZ;
  strncpy((char*)(attr + 1), (char*)name, GENL_NAMSIZ);
  struct iovec iov = {hdr, hdr->nlmsg_len};
  struct sockaddr_nl addr = {0};
  addr.nl_family = AF_NETLINK;
  int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (fd == -1) {
    return -1;
  }
  struct msghdr msg = {&addr, sizeof(addr), &iov, 1, NULL, 0, 0};
  if (sendmsg(fd, &msg, 0) == -1) {
    close(fd);
    return -1;
  }
  ssize_t n = recv(fd, buf, sizeof(buf), 0);
  close(fd);
  if (n <= 0) {
    return -1;
  }
  if (hdr->nlmsg_type != GENL_ID_CTRL) {
    return -1;
  }
  for (; (char*)attr < buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID)
      return *(uint16_t*)(attr + 1);
  }
  return -1;
}

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

void execute_one(void)
{
  long res = 0;
  syscall(__NR_ioctl, -1, 0x400454d4, 0);
  res = syscall(__NR_socket, 2, 2, 0);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000900,
         "\x6d\x61\x6e\x67\x6c\x65\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
         "\x00\x9b\x97\x9c\xd5\x03\x05\x12\xa0\x00\x00\x00\x00\x00\x00\x1f\x00"
         "\x00\x00\x06\x00\x00\x00\xf8\xe3\xff\xff\xff\xff\xff\xff\xf7\x00\x00"
         "\x00\xb0\x02\x00\x00\x70\x03\x00\x00\x00\x00\x00\x00\x90\x05\x00\x00"
         "\x90\x05\x00\x00\x90\x05\x00\x00\x90\x05\x00\x00\x90\x05\x00\x00\x06"
         "\x00\x08\x00",
         88);
  *(uint64_t*)0x20000958 = 0;
  syscall(__NR_setsockopt, r[0], 0, 0x40, 0x20000900, 3);
  syscall(__NR_socketpair, 1, 0, 0, 0x20000240);
  syscall(__NR_openat, 0xffffffffffffff9c, 0, 0x100, 0);
  memcpy((void*)0x20000100, "/dev/net/tun\x00", 13);
  syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 0, 0);
  syscall(__NR_clone, 0x8860000, 0, 0, 0, 0);
  syscall(__NR_socket, 0x10, 3, 0);
  res = syscall(__NR_accept4, -1, 0, 0, 0);
  if (res != -1)
    r[1] = res;
  memcpy((void*)0x20000400, "IPVS\x00", 5);
  syz_genetlink_get_family_id(0x20000400);
  syscall(__NR_write, r[1], 0, 0);
  *(uint8_t*)0x20000680 = 0;
  *(uint8_t*)0x20000681 = 0xfb;
  *(uint8_t*)0x20000682 = 0x15;
  *(uint8_t*)0x20000683 = 0;
  *(uint8_t*)0x20000684 = 0xa;
  memcpy((void*)0x20000685,
         "\xb0\x53\x24\x50\xd9\xc8\x64\x8c\x27\x91\x1f\x4d\x32\x76\x0a\xd5",
         16);
  syscall(__NR_lsetxattr, 0, 0, 0x20000680, 0x15, 0);
  syscall(__NR_openat, 0xffffffffffffff9c, 0, 0, 0);
  syscall(__NR_clone, 0x2102001ffc, 0, 0x9999999999999999, 0x20000640, -1);
  syscall(__NR_ioctl, -1, 0xc018620b, 0);
}
int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 6; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}