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Since:
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commit 816c04fe7ef01dd9649f5ccfe796474db8708be5
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Author: Christian Lamparter <chunkeey@googlemail.com>
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Date: Sat Apr 30 15:24:30 2011 +0200
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mac80211: consolidate MIC failure report handling
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is possible to that we dereference rx->key == NULL when driver set
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RX_FLAG_MMIC_STRIPPED and not RX_FLAG_IV_STRIPPED and we are in
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promiscuous mode. This happen with rt73usb and rt61pci at least.
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Before the commit we always check rx->key against NULL, so I assume
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fix should be done in mac80211 (also mic_fail path has similar check).
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References:
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https://bugzilla.redhat.com/show_bug.cgi?id=769766
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http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/2012-January/004395.html
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Cc: stable@vger.kernel.org # 3.0+
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Reported-by: Stuart D Gathman <stuart@gathman.org>
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Reported-by: Kai Wohlfahrt <kai.scorpio@gmail.com>
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Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
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---
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net/mac80211/wpa.c | 2 +-
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1 files changed, 1 insertions(+), 1 deletions(-)
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diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
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index 93aab07..422b798 100644
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--- a/net/mac80211/wpa.c
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+++ b/net/mac80211/wpa.c
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@@ -106,7 +106,7 @@ ieee80211_rx_h_michael_mic_verify(struct ieee80211_rx_data *rx)
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if (status->flag & RX_FLAG_MMIC_ERROR)
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goto mic_fail;
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- if (!(status->flag & RX_FLAG_IV_STRIPPED))
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+ if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key)
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goto update_iv;
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return RX_CONTINUE;
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--
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1.7.1
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--
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