commit: 4045f72bcf3c293c7c5932ef001742d8bb5ded76 From: Stanislaw Gruszka <[email protected]> Date: Tue, 2 Oct 2012 21:34:23 +0200 Subject: mac80211: check if key has TKIP type before updating IV
This patch fix corruption which can manifest itself by following crash when switching on rfkill switch with rt2x00 driver: https://bugzilla.redhat.com/attachment.cgi?id=615362 Pointer key->u.ccmp.tfm of group key get corrupted in: ieee80211_rx_h_michael_mic_verify(): /* update IV in key information to be able to detect replays */ rx->key->u.tkip.rx[rx->security_idx].iv32 = rx->tkip_iv32; rx->key->u.tkip.rx[rx->security_idx].iv16 = rx->tkip_iv16; because rt2x00 always set RX_FLAG_MMIC_STRIPPED, even if key is not TKIP. We already check type of the key in different path in ieee80211_rx_h_michael_mic_verify() function, so adding additional check here is reasonable. Cc: [email protected] # 3.0+ Signed-off-by: Stanislaw Gruszka <[email protected]> Signed-off-by: John W. Linville <[email protected]> --- net/mac80211/wpa.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c index bdb53ab..e72562a 100644 --- a/net/mac80211/wpa.c +++ b/net/mac80211/wpa.c @@ -106,7 +106,8 @@ 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) && rx->key) + if (!(status->flag & RX_FLAG_IV_STRIPPED) && rx->key && + rx->key->conf.cipher == WLAN_CIPHER_SUITE_TKIP) goto update_iv; return RX_CONTINUE; -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
