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Subject[29/70] bridge: Reset IPCB when entering IP stack on NF_FORWARD
2.6.38-stable review patch.  If anyone has any objections, please let us know.


From: Herbert Xu <>

[ Upstream commit 6b1e960fdbd75dcd9bcc3ba5ff8898ff1ad30b6e ]

Whenever we enter the IP stack proper from bridge netfilter we
need to ensure that the skb is in a form the IP stack expects
it to be in.

The entry point on NF_FORWARD did not meet the requirements of
the IP stack, therefore leading to potential crashes/panics.

This patch fixes the problem.

Signed-off-by: Herbert Xu <>
Acked-by: Stephen Hemminger <>
Signed-off-by: David S. Miller <>
Signed-off-by: Greg Kroah-Hartman <>
net/bridge/br_netfilter.c | 3 +++
1 file changed, 3 insertions(+)

--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -741,6 +741,9 @@ static unsigned int br_nf_forward_ip(uns
nf_bridge->mask |= BRNF_PKT_TYPE;

+ if (br_parse_ip_options(skb))
+ return NF_DROP;
/* The physdev module checks on this */
nf_bridge->mask |= BRNF_BRIDGED;
nf_bridge->physoutdev = skb->dev;

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