Commit e3e86b51 authored Jun 04, 2017 by David S. Miller

ipv6: Fix leak in ipv6_gso_segment().



If ip6_find_1stfragopt() fails and we return an error we have to free
up 'segs' because nobody else is going to.

Fixes: 2423496a ("ipv6: Prevent overrun when parsing v6 header options")
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 9a1c44d9

net/ipv6/ip6_offload.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -116,8 +116,10 @@ static struct sk_buff ipv6_gso_segment(struct sk_buff skb,

		if (udpfrag) {
		int err = ip6_find_1stfragopt(skb, &prevhdr);
		if (err < 0)
		if (err < 0) {
		kfree_skb_list(segs);
		return ERR_PTR(err);
		}
		fptr = (struct frag_hdr )((u8 )ipv6h + err);
		fptr->frag_off = htons(offset);
		if (skb->next)