Given the following code containing errors, provide Common Weakness Enumeration (CWE) identifiers and corresponding messages in JSON format. Each identified weakness should have a unique entry in the JSON array.
    Code: static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
	struct sock *sk = sock->sk;
	struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
	ax25_dev *ax25_dev = NULL;
	ax25_uid_assoc *user;
	ax25_address call;
	ax25_cb *ax25;
	int err = 0;

	if (addr_len != sizeof(struct sockaddr_ax25) &&
	    addr_len != sizeof(struct full_sockaddr_ax25))
		/* support for old structure may go away some time
		 * ax25_bind(): uses old (6 digipeater) socket structure.
		 */
		if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
		    (addr_len > sizeof(struct full_sockaddr_ax25)))
			return -EINVAL;

	if (addr->fsa_ax25.sax25_family != AF_AX25)
		return -EINVAL;

	user = ax25_findbyuid(current_euid());
	if (user) {
		call = user->call;
		ax25_uid_put(user);
	} else {
		if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
			return -EACCES;

		call = addr->fsa_ax25.sax25_call;
	}

	lock_sock(sk);

	ax25 = sk_to_ax25(sk);
	if (!sock_flag(sk, SOCK_ZAPPED)) {
		err = -EINVAL;
		goto out;
	}

	ax25->source_addr = call;

	/*
	 * User already set interface with SO_BINDTODEVICE
	 */
	if (ax25->ax25_dev != NULL)
		goto done;

	if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
		if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
		    (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
			err = -EADDRNOTAVAIL;
			goto out;
		}
	} else {
		if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
			err = -EADDRNOTAVAIL;
			goto out;
		}
	}

	if (ax25_dev != NULL)
		ax25_fillin_cb(ax25, ax25_dev);

done:
	ax25_cb_add(ax25);
	sock_reset_flag(sk, SOCK_ZAPPED);

out:
	release_sock(sk);

	return err;
} ; Sample JSON Format Confermily Expected output: "examples" => "cwe": "xxx"; "message": "xxx"
    
 'cwe': ['CWE-416'], 'message': 'ax25: fix UAF bugs of net_device caused by rebinding operation

The ax25_kill_by_device() will set s->ax25_dev = NULL and
call ax25_disconnect() to change states of ax25_cb and
sock, if we call ax25_bind() before ax25_kill_by_device().

However, if we call ax25_bind() again between the window of
ax25_kill_by_device() and ax25_dev_device_down(), the values
and states changed by ax25_kill_by_device() will be reassigned.

Finally, ax25_dev_device_down() will deallocate net_device.
If we dereference net_device in syscall functions such as
ax25_release(), ax25_sendmsg(), ax25_getsockopt(), ax25_getname()
and ax25_info_show(), a UAF bug will occur.

One of the possible race conditions is shown below:

      (USE)                   |      (FREE)
ax25_bind()                   |
                              |  ax25_kill_by_device()
ax25_bind()                   |
ax25_connect()                |    ...
                              |  ax25_dev_device_down()
                              |    ...
                              |    dev_put_track(dev, ...) //FREE
ax25_release()                |    ...
  ax25_send_control()         |
    alloc_skb()      //USE    |

the corresponding fail log is shown below:
===============================================================
BUG: KASAN: use-after-free in ax25_send_control+0x43/0x210
...
Call Trace:
  ...
  ax25_send_control+0x43/0x210
  ax25_release+0x2db/0x3b0
  __sock_release+0x6d/0x120
  sock_close+0xf/0x20
  __fput+0x11f/0x420
  ...
Allocated by task 1283:
  ...
  __kasan_kmalloc+0x81/0xa0
  alloc_netdev_mqs+0x5a/0x680
  mkiss_open+0x6c/0x380
  tty_ldisc_open+0x55/0x90
  ...
Freed by task 1969:
  ...
  kfree+0xa3/0x2c0
  device_release+0x54/0xe0
  kobject_put+0xa5/0x120
  tty_ldisc_kill+0x3e/0x80
  ...

In order to fix these UAF bugs caused by rebinding operation,
this patch adds dev_hold_track() into ax25_bind() and
corresponding dev_put_track() into ax25_kill_by_device().

Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>'