From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Sat, 22 Dec 2018 10:34:54 +0000 (+0000)
Subject: cw1200: fix missing unlock on error in cw1200_hw_scan()
X-Git-Tag: v4.9.177~22
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8663a3619807f685813658608c1addff2c9cd22f;p=platform%2Fkernel%2Flinux-amlogic.git

cw1200: fix missing unlock on error in cw1200_hw_scan()

commit 51c8d24101c79ffce3e79137e2cee5dfeb956dd7 upstream.

Add the missing unlock before return from function cw1200_hw_scan()
in the error handling case.

Fixes: 4f68ef64cd7f ("cw1200: Fix concurrency use-after-free bugs in cw1200_hw_scan()")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/wireless/st/cw1200/scan.c b/drivers/net/wireless/st/cw1200/scan.c
index c5492d7..b35f470 100644
--- a/drivers/net/wireless/st/cw1200/scan.c
+++ b/drivers/net/wireless/st/cw1200/scan.c
@@ -84,8 +84,11 @@ int cw1200_hw_scan(struct ieee80211_hw *hw,
 
 	frame.skb = ieee80211_probereq_get(hw, priv->vif->addr, NULL, 0,
 		req->ie_len);
-	if (!frame.skb)
+	if (!frame.skb) {
+		mutex_unlock(&priv->conf_mutex);
+		up(&priv->scan.lock);
 		return -ENOMEM;
+	}
 
 	if (req->ie_len)
 		memcpy(skb_put(frame.skb, req->ie_len), req->ie, req->ie_len);