linux-kernel - [PATCH 006/241] mac80211: Only process mesh config header on frames that RA

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Message-Id: <1355407206-17100-7-git-send-email-herton.krzesinski@canonical.com>
Date:	Thu, 13 Dec 2012 11:56:11 -0200
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Javier Cardona <javier@...ybit.com>,
	Johannes Berg <johannes.berg@...el.com>,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Subject: [PATCH 006/241] mac80211: Only process mesh config header on frames that RA_MATCH

3.5.7.2 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Javier Cardona <javier@...ybit.com>

commit 555cb715be8ef98b8ec362b23dfc254d432a35b1 upstream.

Doing otherwise is wrong, and may wreak havoc on the mpp tables,
specially if the frame is encrypted.

Reported-by: Chaoxing Lin <Chaoxing.Lin@...ra-3eti.com>
Signed-off-by: Javier Cardona <javier@...ybit.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
---
 net/mac80211/rx.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 965e6ec..33c49d5 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1900,7 +1900,8 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 	    mesh_rmc_check(hdr->addr3, mesh_hdr, rx->sdata))
 		return RX_DROP_MONITOR;
 
-	if (!ieee80211_is_data(hdr->frame_control))
+	if (!ieee80211_is_data(hdr->frame_control) ||
+	    !(status->rx_flags & IEEE80211_RX_RA_MATCH))
 		return RX_CONTINUE;
 
 	if (!mesh_hdr->ttl)
@@ -1944,9 +1945,6 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 	}
 	skb_set_queue_mapping(skb, q);
 
-	if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
-		goto out;
-
 	if (!--mesh_hdr->ttl) {
 		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
 		return RX_DROP_MONITOR;
-- 
1.7.9.5

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