From f92a80a9972175a6a1d36c6c44be47fb0efd020d Mon Sep 17 00:00:00 2001 From: Daniele Di Proietto Date: Mon, 28 Nov 2016 15:43:53 -0800 Subject: [PATCH] openvswitch: Fix skb leak in IPv6 reassembly. If nf_ct_frag6_gather() returns an error other than -EINPROGRESS, it means that we still have a reference to the skb. We should free it before returning from handle_fragments, as stated in the comment above. Fixes: daaa7d647f81 ("netfilter: ipv6: avoid nf_iterate recursion") CC: Florian Westphal CC: Pravin B Shelar CC: Joe Stringer Signed-off-by: Daniele Di Proietto Acked-by: Pravin B Shelar Signed-off-by: David S. Miller --- net/openvswitch/conntrack.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c index 31045ef44a82..fecefa2dc94e 100644 --- a/net/openvswitch/conntrack.c +++ b/net/openvswitch/conntrack.c @@ -370,8 +370,11 @@ static int handle_fragments(struct net *net, struct sw_flow_key *key, skb_orphan(skb); memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm)); err = nf_ct_frag6_gather(net, skb, user); - if (err) + if (err) { + if (err != -EINPROGRESS) + kfree_skb(skb); return err; + } key->ip.proto = ipv6_hdr(skb)->nexthdr; ovs_cb.mru = IP6CB(skb)->frag_max_size; -- 2.30.2