static int key_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c)
{
	struct sk_buff *out_skb;
	struct sadb_msg *out_hdr;
	int err;

	out_skb = pfkey_xfrm_policy2msg_prep(xp);
	if (IS_ERR(out_skb))
		return PTR_ERR(out_skb);

	err = pfkey_xfrm_policy2msg(out_skb, xp, dir);
	if (err < 0)
		return err;

	out_hdr = (struct sadb_msg *) out_skb->data;
	out_hdr->sadb_msg_version = PF_KEY_V2;

	if (c->data.byid && c->event == XFRM_MSG_DELPOLICY)
		out_hdr->sadb_msg_type = SADB_X_SPDDELETE2;
	else
		out_hdr->sadb_msg_type = event2poltype(c->event);
	out_hdr->sadb_msg_errno = 0;
	out_hdr->sadb_msg_seq = c->seq;
	out_hdr->sadb_msg_pid = c->portid;
	pfkey_broadcast(out_skb, GFP_ATOMIC, BROADCAST_ALL, NULL, xp_net(xp));
	return 0;

}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.