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authorStanislaw Gruszka <sgruszka@redhat.com>2012-01-11 09:26:54 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-25 17:24:43 -0800
commitb9e11747e1227d7ad67c5b80be4b206e4059687e (patch)
treeb75224b77cf1dd440d8763cdd2ea228624a4a072
parent93d150e945fdaceb9e8fe18c7b9014569123195d (diff)
mac80211: fix rx->key NULL pointer dereference in promiscuous mode
commit 1140afa862842ac3e56678693050760edc4ecde9 upstream. Since: commit 816c04fe7ef01dd9649f5ccfe796474db8708be5 Author: Christian Lamparter <chunkeey@googlemail.com> Date: Sat Apr 30 15:24:30 2011 +0200 mac80211: consolidate MIC failure report handling is possible to that we dereference rx->key == NULL when driver set RX_FLAG_MMIC_STRIPPED and not RX_FLAG_IV_STRIPPED and we are in promiscuous mode. This happen with rt73usb and rt61pci at least. Before the commit we always check rx->key against NULL, so I assume fix should be done in mac80211 (also mic_fail path has similar check). References: https://bugzilla.redhat.com/show_bug.cgi?id=769766 http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/2012-January/004395.html Reported-by: Stuart D Gathman <stuart@gathman.org> Reported-by: Kai Wohlfahrt <kai.scorpio@gmail.com> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--net/mac80211/wpa.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 8f6a302d2ac..aa1c40ab6a7 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -109,7 +109,7 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
if (status->flag & RX_FLAG_MMIC_ERROR)
goto mic_fail;
- if (!(status->flag & RX_FLAG_IV_STRIPPED))
+ if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key)
goto update_iv;
return RX_CONTINUE;