Commit fc6fb41c authored Oct 18, 2014 by Li RongQing Committed by David S. Miller Oct 18, 2014

ipv6: fix a potential use after free in ip6_offload.c



pskb_may_pull() maybe change skb->data and make opth pointer oboslete,
so set the opth again

Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent b4e3cef7

net/ipv6/ip6_offload.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -46,6 +46,7 @@ static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
		if (unlikely(!pskb_may_pull(skb, len)))
		break;

		opth = (void *)skb->data;
		proto = opth->nexthdr;
		__skb_pull(skb, len);
		}