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authorJohannes Berg <johannes.berg@intel.com>2011-07-06 22:00:35 +0200
committerJohn W. Linville <linville@tuxdriver.com>2011-07-08 11:11:20 -0400
commit75396ae6d433b49482e377e6f8dbf1f42ad53f3a (patch)
tree07fb506f08f3cca7d67d2fd365cc059240b6957b /net/mac80211/cfg.c
parentaba83a0b301c32dbb91c017f33307611e1a1d384 (diff)
downloadop-kernel-dev-75396ae6d433b49482e377e6f8dbf1f42ad53f3a.zip
op-kernel-dev-75396ae6d433b49482e377e6f8dbf1f42ad53f3a.tar.gz
mac80211: fix CMAC races
Just like TKIP and CCMP, CMAC has the PN race. It might not actually be possible to hit it now since there aren't multiple ACs for management frames, but fix it anyway. Also move scratch buffers onto the stack. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/cfg.c')
-rw-r--r--net/mac80211/cfg.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 3000b4c..bfc36e9 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -268,12 +268,13 @@ static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,
params.seq_len = 6;
break;
case WLAN_CIPHER_SUITE_AES_CMAC:
- seq[0] = key->u.aes_cmac.tx_pn[5];
- seq[1] = key->u.aes_cmac.tx_pn[4];
- seq[2] = key->u.aes_cmac.tx_pn[3];
- seq[3] = key->u.aes_cmac.tx_pn[2];
- seq[4] = key->u.aes_cmac.tx_pn[1];
- seq[5] = key->u.aes_cmac.tx_pn[0];
+ pn64 = atomic64_read(&key->u.aes_cmac.tx_pn);
+ seq[0] = pn64;
+ seq[1] = pn64 >> 8;
+ seq[2] = pn64 >> 16;
+ seq[3] = pn64 >> 24;
+ seq[4] = pn64 >> 32;
+ seq[5] = pn64 >> 40;
params.seq = seq;
params.seq_len = 6;
break;
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