[PATCH 5.13 052/151] netfilter: nf_conntrack_bridge: Fix memory leak when error

Greg Kroah-Hartman
2021-08-16T13:22:46Z

From: Yajun Deng <yajun.deng@linux.dev>

[ Upstream commit 38ea9def5b62f9193f6bad96c5d108e2830ecbde ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/bridge/netfilter/nf_conntrack_bridge.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/net/bridge/netfilter/nf_conntrack_bridge.c b/net/bridge/netfilter/nf_conntrack_bridge.c
index 8d033a75a766..fdbed3158555 100644
--- 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:
--
2.30.2