From: Zilin Guan <zilin@seu.edu.cn>
To: nbd@nbd.name
Cc: lorenzo@kernel.org, ryder.lee@mediatek.com,
shayne.chen@mediatek.com, sean.wang@mediatek.com,
matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, jianhao.xu@seu.edu.cn,
Zilin Guan <zilin@seu.edu.cn>
Subject: [PATCH net] mt76: mt7615: Fix memory leak in mt7615_mcu_wtbl_sta_add()
Date: Thu, 13 Nov 2025 06:24:15 +0000 [thread overview]
Message-ID: <20251113062415.103611-1-zilin@seu.edu.cn> (raw)
In mt7615_mcu_wtbl_sta_add(), an skb sskb is allocated. If the
subsequent call to mt76_connac_mcu_alloc_wtbl_req() fails, the function
returns an error without freeing sskb, leading to a memory leak.
Fix this by calling dev_kfree_skb() on sskb in the error handling path
to ensure it is properly released.
Fixes: 99c457d902cf9 ("mt76: mt7615: move mt7615_mcu_set_bmc to mt7615_mcu_ops")
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
---
drivers/net/wireless/mediatek/mt76/mt7615/mcu.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
index 4064e193d4de..08ee2e861c4e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
@@ -874,8 +874,10 @@ mt7615_mcu_wtbl_sta_add(struct mt7615_phy *phy, struct ieee80211_vif *vif,
wtbl_hdr = mt76_connac_mcu_alloc_wtbl_req(&dev->mt76, &msta->wcid,
WTBL_RESET_AND_SET, NULL,
&wskb);
- if (IS_ERR(wtbl_hdr))
+ if (IS_ERR(wtbl_hdr)) {
+ dev_kfree_skb(sskb);
return PTR_ERR(wtbl_hdr);
+ }
if (enable) {
mt76_connac_mcu_wtbl_generic_tlv(&dev->mt76, wskb, vif, sta,
--
2.34.1
next reply other threads:[~2025-11-13 6:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-13 6:24 Zilin Guan [this message]
2025-11-13 7:17 ` [PATCH net] mt76: mt7615: Fix memory leak in mt7615_mcu_wtbl_sta_add() Lorenzo Bianconi
2025-11-13 9:41 ` Zilin Guan
2025-11-13 10:57 ` Lorenzo Bianconi
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