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Patch from Stanislaw Gruszka to fix NULL ptr deref in mac80211 (rhbz 769766)

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This commit is contained in:
Josh Boyer 2012-01-11 11:12:31 -05:00
parent 8ee86905b0
commit 34e654d965
2 changed files with 55 additions and 0 deletions
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8
kernel.spec
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@ -754,6 +754,9 @@ Patch21065: Bluetooth-Add-support-for-BCM20702A0-0a5c-21e3.patch
Patch21070: ext4-Support-check-none-nocheck-mount-options.patch
Patch21071: ext4-Fix-error-handling-on-inode-bitmap-corruption.patch
#rhbz 769766
Patch21072: mac80211-fix-rx-key-NULL-ptr-deref-in-promiscuous-mode.patch
# compat-wireless patches
Patch50000: compat-wireless-config-fixups.patch
Patch50001: compat-wireless-pr_fmt-warning-avoidance.patch
@ -1462,6 +1465,8 @@ ApplyPatch ext4-Support-check-none-nocheck-mount-options.patch
ApplyPatch ext4-Fix-error-handling-on-inode-bitmap-corruption.patch
ApplyPatch mac80211-fix-rx-key-NULL-ptr-deref-in-promiscuous-mode.patch
# END OF PATCH APPLICATIONS
%endif
@ -2296,6 +2301,9 @@ fi
# ||----w |
# || ||
%changelog
* Wed Jan 11 2012 Josh Boyer <jwboyer@redhat.com>
- Patch from Stanislaw Gruszka to fix NULL ptr deref in mac80211 (rhbz 769766)
* Tue Jan 10 2012 John W. Linville <linville@redhat.com>
- Update compat-wireless snapshot with version from 2012-01-09

47
mac80211-fix-rx-key-NULL-ptr-deref-in-promiscuous-mode.patch Normal file
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@ -0,0 +1,47 @@
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
Cc: stable@vger.kernel.org # 3.0+
Reported-by: Stuart D Gathman <stuart@gathman.org>
Reported-by: Kai Wohlfahrt <kai.scorpio@gmail.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
---
net/mac80211/wpa.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 93aab07..422b798 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -106,7 +106,7 @@ 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;
--
1.7.1
--
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