linux-kernel - [PATCH] staging: rtl8723au: fix potential leak in update_bcn_wps

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Date:	Thu, 1 May 2014 13:57:27 +0200
From:	Christian Engelmayer <cengelma@....at>
To:	devel@...verdev.osuosl.org
Cc:	Larry.Finger@...inger.net, Jes.Sorensen@...hat.com,
	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: rtl8723au: fix potential leak in
 update_bcn_wps_ie()

Fix a potential leak in the error path of function update_bcn_wps_ie().
Make sure that allocated memory for 'pbackup_remainder_ie' is freed
upon return. Detected by Coverity - CID 1077718.

Signed-off-by: Christian Engelmayer <cengelma@....at>
---
Compile tested and applies against branch staging-next of tree
git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
---
 drivers/staging/rtl8723au/core/rtw_ap.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/rtl8723au/core/rtw_ap.c b/drivers/staging/rtl8723au/core/rtw_ap.c
index 9b31412..f2c78a7 100644
--- a/drivers/staging/rtl8723au/core/rtw_ap.c
+++ b/drivers/staging/rtl8723au/core/rtw_ap.c
@@ -1276,7 +1276,7 @@ static void update_bcn_wps_ie(struct rtw_adapter *padapter)
 
 	pwps_ie_src = pmlmepriv->wps_beacon_ie;
 	if (pwps_ie_src == NULL)
-		return;
+		goto exit;
 
 	wps_ielen = (uint)pwps_ie_src[1];/* to get ie data len */
 	if ((wps_offset+wps_ielen+2+remainder_ielen)<= MAX_IE_SZ)
@@ -1291,8 +1291,8 @@ static void update_bcn_wps_ie(struct rtw_adapter *padapter)
 		pnetwork->IELength = wps_offset + (wps_ielen+2) + remainder_ielen;
 	}
 
-	if (pbackup_remainder_ie)
-		kfree(pbackup_remainder_ie);
+exit:
+	kfree(pbackup_remainder_ie);
 }
 
 static void update_bcn_p2p_ie(struct rtw_adapter *padapter)
-- 
1.9.1

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