linux-kernel - [PATCH] cw1200: Fix memory leak in cw1200_set

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Date:   Thu, 26 May 2022 11:30:03 +0800
From:   Jianglei Nie <niejianglei2021@....com>
To:     pizza@...ftnet.org, kvalo@...nel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jianglei Nie <niejianglei2021@....com>
Subject: [PATCH] cw1200: Fix memory leak in cw1200_set_key()

When wsm_key.index > WSM_KEY_MAX_INDEX, cw1200_set_key() returns without
calling cw1200_free_key() like other wrong paths, which may lead to a
potential memory leak.

We can fix it by calling cw1200_free_key() when some error occurs.

Signed-off-by: Jianglei Nie <niejianglei2021@....com>
---
 drivers/net/wireless/st/cw1200/sta.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/st/cw1200/sta.c b/drivers/net/wireless/st/cw1200/sta.c
index 236022d4ae2a..c0097577978d 100644
--- a/drivers/net/wireless/st/cw1200/sta.c
+++ b/drivers/net/wireless/st/cw1200/sta.c
@@ -823,6 +823,7 @@ int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
 		};
 
 		if (wsm_key.index > WSM_KEY_MAX_INDEX) {
+			cw1200_free_key(priv, idx);
 			ret = -EINVAL;
 			goto finally;
 		}
-- 
2.25.1