Patch "batman-adv: verify tt len does not exceed packet len" has been added to the 3.8-stable tree

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This is a note to let you know that I've just added the patch titled

    batman-adv: verify tt len does not exceed packet len

to the 3.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     batman-adv-verify-tt-len-does-not-exceed-packet-len.patch
and it can be found in the queue-3.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From dfc8b938216b524800a183791072032a0390c2d1 Mon Sep 17 00:00:00 2001
From: Marek Lindner <lindner_marek@xxxxxxxx>
Date: Mon, 4 Mar 2013 10:39:49 +0800
Subject: batman-adv: verify tt len does not exceed packet len


From: Marek Lindner <lindner_marek@xxxxxxxx>

[ Upstream commit b47506d91259c29b9c75c404737eb6525556f9b4 ]

batadv_iv_ogm_process() accesses the packet using the tt_num_changes
attribute regardless of the real packet len (assuming the length check
was done before). Therefore a length check is needed to avoid reading
random memory.

Signed-off-by: Marek Lindner <lindner_marek@xxxxxxxx>
Signed-off-by: Antonio Quartulli <ordex@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/batman-adv/bat_iv_ogm.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/net/batman-adv/bat_iv_ogm.c
+++ b/net/batman-adv/bat_iv_ogm.c
@@ -1298,7 +1298,8 @@ static int batadv_iv_ogm_receive(struct
 	batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff;
 
 	/* unpack the aggregated packets and process them one by one */
-	do {
+	while (batadv_iv_ogm_aggr_packet(buff_pos, packet_len,
+					 batadv_ogm_packet->tt_num_changes)) {
 		tt_buff = packet_buff + buff_pos + BATADV_OGM_HLEN;
 
 		batadv_iv_ogm_process(ethhdr, batadv_ogm_packet, tt_buff,
@@ -1309,8 +1310,7 @@ static int batadv_iv_ogm_receive(struct
 
 		packet_pos = packet_buff + buff_pos;
 		batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos;
-	} while (batadv_iv_ogm_aggr_packet(buff_pos, packet_len,
-					   batadv_ogm_packet->tt_num_changes));
+	}
 
 	kfree_skb(skb);
 	return NET_RX_SUCCESS;


Patches currently in stable-queue which might be from lindner_marek@xxxxxxxx are

queue-3.8/batman-adv-verify-tt-len-does-not-exceed-packet-len.patch
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