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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2011-08-24 00:44:32 +0400
committerJohn W. Linville <linville@tuxdriver.com>2011-08-24 13:52:27 -0400
commit66cb54bd24086b2d871a03035de9b0e79b2b725e (patch)
tree0d8c6a8790026404bfb18e3bb00f78488a811db4
parent7a5e4877c14de0827dbda8efa5080089757a8733 (diff)
carl9170: Fix mismatch in carl9170_op_set_key mutex lock-unlock
If is_main_vif(ar, vif) reports that we have to fall back to software encryption, we goto err_softw; before locking ar->mutex. As a result, we have unprotected call to carl9170_set_operating_mode and unmatched mutex_unlock. The patch fix the issue by adding mutex_lock before goto. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Cc: <stable@kernel.org> Acked-By: Christian Lamparter <chunkeey@googlemail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/ath/carl9170/main.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c
index 0122930..0474e663 100644
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -1066,8 +1066,10 @@ static int carl9170_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
* the high througput speed in 802.11n networks.
*/
- if (!is_main_vif(ar, vif))
+ if (!is_main_vif(ar, vif)) {
+ mutex_lock(&ar->mutex);
goto err_softw;
+ }
/*
* While the hardware supports *catch-all* key, for offloading