linux-kernel - [PATCH 4.9 011/175] ath9k: Clear key cache explicitly on disabling hardware

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210920163918.438147356@linuxfoundation.org>
Date:   Mon, 20 Sep 2021 18:41:00 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jouni Malinen <jouni@...eaurora.org>,
        Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 4.9 011/175] ath9k: Clear key cache explicitly on disabling hardware

From: Jouni Malinen <jouni@...eaurora.org>

commit 73488cb2fa3bb1ef9f6cf0d757f76958bd4deaca upstream.

Now that ath/key.c may not be explicitly clearing keys from the key
cache, clear all key cache entries when disabling hardware to make sure
no keys are left behind beyond this point.

Signed-off-by: Jouni Malinen <jouni@...eaurora.org>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Link: https://lore.kernel.org/r/20201214172118.18100-3-jouni@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/wireless/ath/ath9k/main.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -894,6 +894,11 @@ static void ath9k_stop(struct ieee80211_
 
 	spin_unlock_bh(&sc->sc_pcu_lock);
 
+	/* Clear key cache entries explicitly to get rid of any potentially
+	 * remaining keys.
+	 */
+	ath9k_cmn_init_crypto(sc->sc_ah);
+
 	ath9k_ps_restore(sc);
 
 	sc->ps_idle = prev_idle;