netfilter: nf_conntrack_bridge: Fix memory leak when error

It should be added kfree_skb_list() when err is not equal to zero
in nf_br_ip_fragment().

v2: keep this aligned with IPv6.
v3: modify iter.frag_list to iter.frag.

Fixes: 3c171f496ef5 ("netfilter: bridge: add connection tracking system")
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/bridge/netfilter/nf_conntrack_bridge.c b/net/bridge/netfilter/nf_conntrack_bridge.c
index 8d033a7..fdbed31 100644 (file)
--- a/net/bridge/netfilter/nf_conntrack_bridge.c
+++ b/net/bridge/netfilter/nf_conntrack_bridge.c
@@ -88,6 +88,12 @@ static int nf_br_ip_fragment(struct net *net, struct sock *sk,
 
                        skb = ip_fraglist_next(&iter);
                }
+
+               if (!err)
+                       return 0;
+
+               kfree_skb_list(iter.frag);
+
                return err;
        }
 slow_path: