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[BR_NETFILTER]: Fix leak if skb traverses > 1 bridge

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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 <david.kimdon@devicescape.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Kimdon 2005-12-26 17:27:10 -08:00 committed by David S. Miller
parent 6f4353d891
commit 79cac2a221
1 changed files with 2 additions and 0 deletions
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2
net/bridge/br_netfilter.c
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@ -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);