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nfnetlink_log: fix crash on bridged packet

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[NETFILTER]: nfnetlink_log: fix crash on bridged packet

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: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Patrick McHardy
2007-03-07 22:34:45 +01:00
committed by Greg Kroah-Hartman
parent d00aff4419
commit 7f5c005cb1
1 changed files with 1 additions and 1 deletions
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net/netfilter/nfnetlink_log.c
+1 -1
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@@ -491,7 +491,7 @@ __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,