ath9k: Clear key cache explicitly on disabling hardware

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@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201214172118.18100-3-jouni@codeaurora.org
Cc: Pali Rohár <pali@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index a678dd8035f318c0d241c9ff4fe61d11f501229c..63081b445f45d56be4dea38207f16153f356c7fa 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -895,6 +895,11 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 
        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;