From 79cac2a221ce18642550a13bed0f0203514923ea Mon Sep 17 00:00:00 2001 From: David Kimdon Date: Mon, 26 Dec 2005 17:27:10 -0800 Subject: [PATCH] [BR_NETFILTER]: Fix leak if skb traverses > 1 bridge Call nf_bridge_put() before allocating a new nf_bridge structure and potentially overwriting the pointer to a previously allocated one. This fixes a memory leak which can occur when the bridge topology allows for an skb to traverse more than one bridge. Signed-off-by: David Kimdon Signed-off-by: David S. Miller --- net/bridge/br_netfilter.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c index 43a0b35dfe6f..23422bd53a5e 100644 --- a/net/bridge/br_netfilter.c +++ b/net/bridge/br_netfilter.c @@ -369,6 +369,7 @@ static unsigned int br_nf_pre_routing_ipv6(unsigned int hook, if (hdr->nexthdr == NEXTHDR_HOP && check_hbh_len(skb)) goto inhdr_error; + nf_bridge_put(skb->nf_bridge); if ((nf_bridge = nf_bridge_alloc(skb)) == NULL) return NF_DROP; setup_pre_routing(skb); @@ -452,6 +453,7 @@ static unsigned int br_nf_pre_routing(unsigned int hook, struct sk_buff **pskb, skb->ip_summed = CHECKSUM_NONE; } + nf_bridge_put(skb->nf_bridge); if ((nf_bridge = nf_bridge_alloc(skb)) == NULL) return NF_DROP; setup_pre_routing(skb); -- 2.20.1