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Commit 7f91ed8c authored by Andrea Mayer's avatar Andrea Mayer Committed by David S. Miller
Browse files

seg6: fix srh pointer in get_srh() 



pskb_may_pull may change pointers in header. For this reason, it is
mandatory to reload any pointer that points into skb header.

Signed-off-by: default avatarAndrea Mayer <andrea.mayer@uniroma2.it>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent acb9bdc1

net/ipv6/seg6_local.c

+5 −0
Original line number Diff line number Diff line
@@ -81,6 +81,11 @@ static struct ipv6_sr_hdr *get_srh(struct sk_buff *skb) 
	if (!pskb_may_pull(skb, srhoff + len))

		return NULL;



	/* note that pskb_may_pull may change pointers in header;

	 * for this reason it is necessary to reload them when needed.

	 */

	srh = (struct ipv6_sr_hdr *)(skb->data + srhoff);



	if (!seg6_validate_srh(srh, len))

		return NULL;