linux-kernel - [PATCH 3.16.y-ckt 009/144] mac80211: drop unencrypted frames in mesh fwding

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Message-Id: <1429630329-21748-10-git-send-email-luis.henriques@canonical.com>
Date:	Tue, 21 Apr 2015 16:29:54 +0100
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Bob Copeland <me@...copeland.com>,
	Johannes Berg <johannes.berg@...el.com>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 009/144] mac80211: drop unencrypted frames in mesh fwding

3.16.7-ckt10 -stable review patch.  If anyone has any objections, please let me know.

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

From: Bob Copeland <me@...copeland.com>

commit d0c22119f574b851e63360c6b8660fe9593bbc3c upstream.

The mesh forwarding path was not checking that data
frames were protected when running an encrypted network;
add the necessary check.

Reported-by: Johannes Berg <johannes@...solutions.net>
Signed-off-by: Bob Copeland <me@...copeland.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 net/mac80211/rx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 247b41be695b..a70f4ce4f652 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2076,6 +2076,9 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 	hdr = (struct ieee80211_hdr *) skb->data;
 	mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
 
+	if (ieee80211_drop_unencrypted(rx, hdr->frame_control))
+		return RX_DROP_MONITOR;
+
 	/* frame is in RMC, don't forward */
 	if (ieee80211_is_data(hdr->frame_control) &&
 	    is_multicast_ether_addr(hdr->addr1) &&
--
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