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[NETFILTER]: nfnetlink_log: fix crash on bridged packet

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physoutdev is only set on purely bridged packet, when nfnetlink_log is used
in the OUTPUT/FORWARD/POSTROUTING hooks on packets forwarded from or to a
bridge it crashes when trying to dereference skb->nf_bridge->physoutdev.

Reported by Holger Eitzenberger <heitzenberger@astaro.com>

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-03-06 20:24:53 -08:00 committed by David S. Miller
parent 881dbfe8ac
commit ba5dcee128
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/nfnetlink_log.c
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@ -486,7 +486,7 @@ __build_packet_message(struct nfulnl_instance *inst,
* for physical device (when called from ipv4) */
NFA_PUT(inst->skb, NFULA_IFINDEX_OUTDEV,
sizeof(tmp_uint), &tmp_uint);
if (skb->nf_bridge) {
if (skb->nf_bridge && skb->nf_bridge->physoutdev) {
tmp_uint =
htonl(skb->nf_bridge->physoutdev->ifindex);
NFA_PUT(inst->skb, NFULA_IFINDEX_PHYSOUTDEV,