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 <[email protected]> know about it.
>From dfc8b938216b524800a183791072032a0390c2d1 Mon Sep 17 00:00:00 2001
From: Marek Lindner <[email protected]>
Date: Mon, 4 Mar 2013 10:39:49 +0800
Subject: batman-adv: verify tt len does not exceed packet len
From: Marek Lindner <[email protected]>
[ 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 <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
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 [email protected] are
queue-3.8/batman-adv-verify-tt-len-does-not-exceed-packet-len.patch
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