Subject: [PATCH v2] bridge: Reset IPCB on forward non-local packets in br_handle_frame_finish()

From: Vasily Averin <[email-masked]>
Date: Wed, 02 Nov 2011 23:37:29 +0400

v2: extra bracket was removed

if dst is not local br_handle_frame_finish() does not clone original skb and
forgets to reset IPCB before return to IP stack. it can lead to stack corruption
in icmp_send()

Signed-off-by: Vasily Averin <[email-masked]>
---
 net/bridge/br_input.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index f06ee39..6be8d00 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -93,10 +93,11 @@ int br_handle_frame_finish(struct sk_buff *skb)
 			skb2 = skb;

 		br->dev->stats.multicast++;
-	} else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
+	} else if ((dst = __br_fdb_get(br, dest)) != NULL) {
 		skb2 = skb;
 		/* Do not forward the packet since it's local. */
-		skb = NULL;
+		if (dst->is_local)
+			skb = NULL;
 	}

 	if (skb) {
-- 1.7.5.4