linux-kernel - [PATCH AUTOSEL 6.6 19/20] wifi: mac80211: free skb on error path in ieee80211_beacon_get

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Message-ID: <20240903192425.1107562-19-sashal@kernel.org>
Date: Tue,  3 Sep 2024 15:23:51 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Dmitry Antipov <dmantipov@...dex.ru>,
	Johannes Berg <johannes.berg@...el.com>,
	Sasha Levin <sashal@...nel.org>,
	johannes@...solutions.net,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 19/20] wifi: mac80211: free skb on error path in ieee80211_beacon_get_ap()

From: Dmitry Antipov <dmantipov@...dex.ru>

[ Upstream commit 786c5be9ac29a39b6f37f1fdd2ea59d0fe35d525 ]

In 'ieee80211_beacon_get_ap()', free allocated skb in case of error
returned by 'ieee80211_beacon_protect()'. Compile tested only.

Signed-off-by: Dmitry Antipov <dmantipov@...dex.ru>
Link: https://patch.msgid.link/20240805142035.227847-1-dmantipov@yandex.ru
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/mac80211/tx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 46b02a6ae0a36..415e951e4138a 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -5311,8 +5311,10 @@ ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
 	if (beacon->tail)
 		skb_put_data(skb, beacon->tail, beacon->tail_len);
 
-	if (ieee80211_beacon_protect(skb, local, sdata, link) < 0)
+	if (ieee80211_beacon_protect(skb, local, sdata, link) < 0) {
+		dev_kfree_skb(skb);
 		return NULL;
+	}
 
 	ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
 				    chanctx_conf, csa_off_base);
-- 
2.43.0