[PATCH 5.4 04/61] ath9k: Clear key cache explicitly on disabling hardware

Sasha Levin
2021-08-24T17:14:46Z

From: Jouni Malinen <jouni@codeaurora.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@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>
---
drivers/net/wireless/ath/ath9k/main.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index d14e01da3c31..eae7b7e58429 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -896,6 +896,11 @@ 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;
--
2.30.2