// https://syzkaller.appspot.com/bug?id=00fadf9a6326e13098672b601d57f644cae380e9
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <netinet/in.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/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/if_addr.h>
#include <linux/if_link.h>
#include <linux/in6.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/veth.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;
}

struct nlmsg {
  char* pos;
  int nesting;
  struct nlattr* nested[8];
  char buf[4096];
};

static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
                         const void* data, int size)
{
  memset(nlmsg, 0, sizeof(*nlmsg));
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_type = typ;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
  memcpy(hdr + 1, data, size);
  nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}

static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data,
                         int size)
{
  struct nlattr* attr = (struct nlattr*)nlmsg->pos;
  attr->nla_len = sizeof(*attr) + size;
  attr->nla_type = typ;
  if (size > 0)
    memcpy(attr + 1, data, size);
  nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}

static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type,
                            int* reply_len, bool dofail)
{
  if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
    exit(1);
  struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
  hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
  struct sockaddr_nl addr;
  memset(&addr, 0, sizeof(addr));
  addr.nl_family = AF_NETLINK;
  ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
                     (struct sockaddr*)&addr, sizeof(addr));
  if (n != (ssize_t)hdr->nlmsg_len) {
    if (dofail)
      exit(1);
    return -1;
  }
  n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  if (reply_len)
    *reply_len = 0;
  if (n < 0) {
    if (dofail)
      exit(1);
    return -1;
  }
  if (n < (ssize_t)sizeof(struct nlmsghdr)) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type == NLMSG_DONE)
    return 0;
  if (reply_len && hdr->nlmsg_type == reply_type) {
    *reply_len = n;
    return 0;
  }
  if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  if (hdr->nlmsg_type != NLMSG_ERROR) {
    errno = EINVAL;
    if (dofail)
      exit(1);
    return -1;
  }
  errno = -((struct nlmsgerr*)(hdr + 1))->error;
  return -errno;
}

static int netlink_query_family_id(struct nlmsg* nlmsg, int sock,
                                   const char* family_name, bool dofail)
{
  struct genlmsghdr genlhdr;
  memset(&genlhdr, 0, sizeof(genlhdr));
  genlhdr.cmd = CTRL_CMD_GETFAMILY;
  netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
  netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name,
               strnlen(family_name, GENL_NAMSIZ - 1) + 1);
  int n = 0;
  int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
  if (err < 0) {
    return -1;
  }
  uint16_t id = 0;
  struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
                                         NLMSG_ALIGN(sizeof(genlhdr)));
  for (; (char*)attr < nlmsg->buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
      id = *(uint16_t*)(attr + 1);
      break;
    }
  }
  if (!id) {
    errno = EINVAL;
    return -1;
  }
  recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
  return id;
}

const int kInitNetNsFd = 201;

static long syz_init_net_socket(volatile long domain, volatile long type,
                                volatile long proto)
{
  return syscall(__NR_socket, domain, type, proto);
}

static long syz_genetlink_get_family_id(volatile long name,
                                        volatile long sock_arg)
{
  bool dofail = false;
  int fd = sock_arg;
  if (fd < 0) {
    dofail = true;
    fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
    if (fd == -1) {
      return -1;
    }
  }
  struct nlmsg nlmsg_tmp;
  int ret = netlink_query_family_id(&nlmsg_tmp, fd, (char*)name, dofail);
  if ((int)sock_arg < 0)
    close(fd);
  if (ret < 0) {
    return -1;
  }
  return ret;
}

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[5] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff,
                 0x0, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  res = syscall(__NR_socket, 2ul, 2ul, 0);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000040,
         "filter\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000\000",
         32);
  *(uint32_t*)0x20000060 = 0xe;
  *(uint32_t*)0x20000064 = 4;
  *(uint32_t*)0x20000068 = 0x2a8;
  *(uint32_t*)0x2000006c = -1;
  *(uint32_t*)0x20000070 = 0;
  *(uint32_t*)0x20000074 = 0x98;
  *(uint32_t*)0x20000078 = 0x98;
  *(uint32_t*)0x2000007c = -1;
  *(uint32_t*)0x20000080 = -1;
  *(uint32_t*)0x20000084 = 0x210;
  *(uint32_t*)0x20000088 = 0x210;
  *(uint32_t*)0x2000008c = 0x210;
  *(uint32_t*)0x20000090 = -1;
  *(uint32_t*)0x20000094 = 4;
  *(uint64_t*)0x20000098 = 0;
  *(uint32_t*)0x200000a0 = htobe32(-1);
  *(uint32_t*)0x200000a4 = htobe32(-1);
  *(uint32_t*)0x200000a8 = htobe32(0);
  *(uint32_t*)0x200000ac = htobe32(0);
  memcpy((void*)0x200000b0,
         "hsr0\000\000\000\000\000\000\000\000\000\000\000\000", 16);
  memcpy((void*)0x200000c0, "veth1_to_bridge\000", 16);
  *(uint8_t*)0x200000d0 = 0;
  *(uint8_t*)0x200000e0 = 0;
  *(uint16_t*)0x200000f0 = 0;
  *(uint8_t*)0x200000f2 = 0;
  *(uint8_t*)0x200000f3 = 0;
  *(uint32_t*)0x200000f4 = 0;
  *(uint16_t*)0x200000f8 = 0x70;
  *(uint16_t*)0x200000fa = 0x98;
  *(uint32_t*)0x200000fc = 0;
  *(uint64_t*)0x20000100 = 0;
  *(uint64_t*)0x20000108 = 0;
  *(uint16_t*)0x20000110 = 0x28;
  memcpy((void*)0x20000112,
         "REJECT\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x2000012f = 0;
  *(uint32_t*)0x20000130 = 0;
  *(uint32_t*)0x20000138 = htobe32(0);
  *(uint32_t*)0x2000013c = htobe32(0);
  *(uint32_t*)0x20000140 = htobe32(0);
  *(uint32_t*)0x20000144 = htobe32(0);
  memcpy((void*)0x20000148, "wlan0\000\000\000\000\000\000\000\000\000\000\000",
         16);
  memcpy((void*)0x20000158, "batadv0\000\000\000\000\000\000\000\000\000", 16);
  *(uint8_t*)0x20000168 = 0;
  *(uint8_t*)0x20000178 = 0;
  *(uint16_t*)0x20000188 = 6;
  *(uint8_t*)0x2000018a = 0;
  *(uint8_t*)0x2000018b = 0;
  *(uint32_t*)0x2000018c = 0;
  *(uint16_t*)0x20000190 = 0x98;
  *(uint16_t*)0x20000192 = 0xc0;
  *(uint32_t*)0x20000194 = 0;
  *(uint64_t*)0x20000198 = 0;
  *(uint64_t*)0x200001a0 = 0;
  *(uint16_t*)0x200001a8 = 0x28;
  memcpy((void*)0x200001aa,
         "tcpmss\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x200001c7 = 0;
  *(uint16_t*)0x200001c8 = 0;
  *(uint16_t*)0x200001ca = 0;
  *(uint8_t*)0x200001cc = 0;
  *(uint16_t*)0x200001d0 = 0x28;
  memcpy((void*)0x200001d2,
         "REJECT\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x200001ef = 0;
  *(uint32_t*)0x200001f0 = 0;
  *(uint32_t*)0x200001f8 = htobe32(0xe0000001);
  *(uint32_t*)0x200001fc = htobe32(0);
  *(uint32_t*)0x20000200 = htobe32(0);
  *(uint32_t*)0x20000204 = htobe32(0);
  memcpy((void*)0x20000208, "netpci0\000\000\000\000\000\000\000\000\000", 16);
  memcpy((void*)0x20000218, "rose0\000\000\000\000\000\000\000\000\000\000\000",
         16);
  *(uint8_t*)0x20000228 = 0;
  *(uint8_t*)0x20000238 = 0;
  *(uint16_t*)0x20000248 = 0;
  *(uint8_t*)0x2000024a = 0;
  *(uint8_t*)0x2000024b = 0;
  *(uint32_t*)0x2000024c = 0;
  *(uint16_t*)0x20000250 = 0x70;
  *(uint16_t*)0x20000252 = 0xb8;
  *(uint32_t*)0x20000254 = 0;
  *(uint64_t*)0x20000258 = 0;
  *(uint64_t*)0x20000260 = 0;
  *(uint16_t*)0x20000268 = 0x48;
  memcpy((void*)0x2000026a,
         "TEE\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
         "\000\000\000\000\000\000\000\000\000\000",
         29);
  *(uint8_t*)0x20000287 = 1;
  *(uint32_t*)0x20000288 = htobe32(0xe0000001);
  memcpy((void*)0x20000298, "ip6gretap0\000\000\000\000\000\000", 16);
  *(uint64_t*)0x200002a8 = 0;
  memset((void*)0x200002b0, 0, 84);
  *(uint32_t*)0x20000304 = 0;
  *(uint16_t*)0x20000308 = 0x70;
  *(uint16_t*)0x2000030a = 0x98;
  *(uint32_t*)0x2000030c = 0;
  *(uint64_t*)0x20000310 = 0;
  *(uint64_t*)0x20000318 = 0;
  *(uint16_t*)0x20000320 = 0x28;
  memset((void*)0x20000322, 0, 29);
  *(uint8_t*)0x2000033f = 0;
  *(uint32_t*)0x20000340 = 0xfffffffe;
  syscall(__NR_setsockopt, r[0], 0, 0x40, 0x20000040ul, 0x308ul);
  res = -1;
  res = syz_init_net_socket(0x10, 3, 0x10);
  if (res != -1)
    r[1] = res;
  res = -1;
  res = syz_init_net_socket(0x10, 3, 0x10);
  if (res != -1)
    r[2] = res;
  memcpy((void*)0x200000c0, "802.15.4 MAC\000", 13);
  res = -1;
  res = syz_genetlink_get_family_id(0x200000c0, r[2]);
  if (res != -1)
    r[3] = res;
  *(uint64_t*)0x200003c0 = 0;
  *(uint32_t*)0x200003c8 = 0;
  *(uint64_t*)0x200003d0 = 0x20000380;
  *(uint64_t*)0x20000380 = 0x20000340;
  *(uint32_t*)0x20000340 = 0x20;
  *(uint16_t*)0x20000344 = r[3];
  *(uint16_t*)0x20000346 = 1;
  *(uint32_t*)0x20000348 = 0;
  *(uint32_t*)0x2000034c = 0;
  *(uint8_t*)0x20000350 = 0x22;
  *(uint8_t*)0x20000351 = 0;
  *(uint16_t*)0x20000352 = 0;
  *(uint16_t*)0x20000354 = 0xa;
  *(uint16_t*)0x20000356 = 1;
  memcpy((void*)0x20000358, "wpan1\000", 6);
  *(uint64_t*)0x20000388 = 0x20;
  *(uint64_t*)0x200003d8 = 1;
  *(uint64_t*)0x200003e0 = 0;
  *(uint64_t*)0x200003e8 = 0;
  *(uint32_t*)0x200003f0 = 0;
  syscall(__NR_sendmsg, r[1], 0x200003c0ul, 0ul);
  res = syscall(__NR_socket, 0x10ul, 3ul, 0xc);
  if (res != -1)
    r[4] = res;
  *(uint64_t*)0x20000200 = 0;
  *(uint32_t*)0x20000208 = 0;
  *(uint64_t*)0x20000210 = 0x200001c0;
  *(uint64_t*)0x200001c0 = 0x20000140;
  memcpy((void*)0x20000140,
         "\x57\x00\x00\x00\x00\x0b\x01\x02\x00\x00\x00\x00\x00\x00\x00\x00\x0a"
         "\x00\x00\x07\x08\x00\x01\x00\x2c\x2d\x27\x00\x05\x00\x01\x00\x00\x00"
         "\x00\x00\x08\x00\x03\x40\x00\x00\x00\x00\x08\x00\x02\x40\x00\x00\x00"
         "\x05\x0b\x00\x01\x00\x3a\x50\x26\x26\x2e\x23\x00\x00\x08\x00\x02\x40"
         "\x00\x00\x00\x05\x07\x00\x01\x00\x5c\x2d\x00\x00\x08\x00\x02\x40\x00"
         "\x00\x00\x05\x06\x00\x01",
         91);
  *(uint64_t*)0x200001c8 = 0x68;
  *(uint64_t*)0x20000218 = 1;
  *(uint64_t*)0x20000220 = 0;
  *(uint64_t*)0x20000228 = 0;
  *(uint32_t*)0x20000230 = 0;
  syscall(__NR_sendmsg, r[4], 0x20000200ul, 0ul);
}
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;
}