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ipv6: Fix leak in ipv6_gso_segment().

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

Fixes: 2423496af3 ("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>
This commit is contained in:
David S. Miller 2017-06-04 21:41:10 -04:00
parent 9a1c44d989
commit e3e86b5119
1 changed files with 3 additions and 1 deletions
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4
net/ipv6/ip6_offload.c
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@ -116,8 +116,10 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
if (udpfrag) { if (udpfrag) {
int err = ip6_find_1stfragopt(skb, &prevhdr); int err = ip6_find_1stfragopt(skb, &prevhdr);
if (err < 0) if (err < 0) {
kfree_skb_list(segs);
return ERR_PTR(err); return ERR_PTR(err);
}
fptr = (struct frag_hdr *)((u8 *)ipv6h + err); fptr = (struct frag_hdr *)((u8 *)ipv6h + err);
fptr->frag_off = htons(offset); fptr->frag_off = htons(offset);
if (skb->next) if (skb->next)