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Subject[PATCH] carl9170: Fix mismatch in carl9170_op_set_key mutex lock-unlock
Date
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>
---
drivers/net/wireless/ath/carl9170/main.c | 4 +++-
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
--
1.7.4.1


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