netdev - [PATCH] wifi: cfg80211: fix a possible memory leak

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Date:   Tue,  1 Nov 2022 15:19:31 -0500
From:   Dinh Nguyen <dinguyen@...nel.org>
To:     johannes@...solutions.net
Cc:     dinguyen@...nel.org, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] wifi: cfg80211: fix a possible memory leak

Klockworks reported a possible memory leak when
cfg80211_inform_single_bss_data() return on an error and ies is left
allocated.

Fixes: 0e227084aee3 ("cfg80211: clarify BSS probe response vs. beacon data")
Signed-off-by: Dinh Nguyen <dinguyen@...nel.org>
---
 net/wireless/scan.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 806a5f1330ff..3c81dc17e079 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -2015,8 +2015,10 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
 
 	signal_valid = data->chan == channel;
 	res = cfg80211_bss_update(wiphy_to_rdev(wiphy), &tmp, signal_valid, ts);
-	if (!res)
+	if (!res) {
+		kfree(ies);
 		return NULL;
+	}
 
 	if (channel->band == NL80211_BAND_60GHZ) {
 		bss_type = res->pub.capability & WLAN_CAPABILITY_DMG_TYPE_MASK;
-- 
2.25.1