linux-kernel - [PATCH] wifi: ath11k: Fix memory leak in ath11k_peer_rx_frag

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Message-Id: <20221229073849.1388315-1-linmq006@gmail.com>
Date:   Thu, 29 Dec 2022 11:38:48 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Manikanta Pubbisetty <mpubbise@...eaurora.org>,
        ath11k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] wifi: ath11k: Fix memory leak in ath11k_peer_rx_frag_setup

crypto_alloc_shash() allocates resources, which should be released by
crypto_free_shash(). When ath11k_peer_find() fails, there has memory
leak. Move crypto_alloc_shash() after ath11k_peer_find() to fix this.

Fixes: 243874c64c81 ("ath11k: handle RX fragments")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/net/wireless/ath/ath11k/dp_rx.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
index c5a4c34d7749..1297caa2b09a 100644
--- a/drivers/net/wireless/ath/ath11k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
@@ -3116,10 +3116,6 @@ int ath11k_peer_rx_frag_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id
 	struct dp_rx_tid *rx_tid;
 	int i;
 
-	tfm = crypto_alloc_shash("michael_mic", 0, 0);
-	if (IS_ERR(tfm))
-		return PTR_ERR(tfm);
-
 	spin_lock_bh(&ab->base_lock);
 
 	peer = ath11k_peer_find(ab, vdev_id, peer_mac);
@@ -3129,6 +3125,10 @@ int ath11k_peer_rx_frag_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id
 		return -ENOENT;
 	}
 
+	tfm = crypto_alloc_shash("michael_mic", 0, 0);
+	if (IS_ERR(tfm))
+		return PTR_ERR(tfm);
+
 	for (i = 0; i <= IEEE80211_NUM_TIDS; i++) {
 		rx_tid = &peer->rx_tid[i];
 		rx_tid->ab = ab;
-- 
2.25.1