This is a note to let you know that I've just added the patch titled
mac80211: drop spoofed packets in ad-hoc mode
to the 3.4-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:
mac80211-drop-spoofed-packets-in-ad-hoc-mode.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f9ec1e9afbfea2bac94d54dd92d969755798160d Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@xxxxxxxxxxx>
Date: Tue, 17 Sep 2013 11:15:43 +0200
Subject: mac80211: drop spoofed packets in ad-hoc mode
From: Felix Fietkau <nbd@xxxxxxxxxxx>
commit 6329b8d917adc077caa60c2447385554130853a3 upstream.
If an Ad-Hoc node receives packets with the Cell ID or its own MAC
address as source address, it hits a WARN_ON in sta_info_insert_check()
With many packets, this can massively spam the logs. One way that this
can easily happen is through having Cisco APs in the area with rouge AP
detection and countermeasures enabled.
Such Cisco APs will regularly send fake beacons, disassoc and deauth
packets that trigger these warnings.
To fix this issue, drop such spoofed packets early in the rx path.
Reported-by: Thomas Huehn <thomas@xxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
[bwh: Backported to 3.2: use compare_ether_addr() instead of ether_addr_equal()]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: Qiang Huang <h.huangqiang@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/rx.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2828,6 +2828,9 @@ static int prepare_for_handlers(struct i
case NL80211_IFTYPE_ADHOC:
if (!bssid)
return 0;
+ if (compare_ether_addr(sdata->vif.addr, hdr->addr2) == 0 ||
+ compare_ether_addr(sdata->u.ibss.bssid, hdr->addr2) == 0)
+ return 0;
if (ieee80211_is_beacon(hdr->frame_control)) {
return 1;
}
Patches currently in stable-queue which might be from nbd@xxxxxxxxxxx are
queue-3.4/mac80211-drop-spoofed-packets-in-ad-hoc-mode.patch
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