netdev - [PATCH net v2 2/3] nfc: st-nci: fix memory leaks in EVT

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Date:   Mon, 21 Nov 2022 18:42:45 -0600
From:   Martin Faltesek <mfaltesek@...gle.com>
To:     kuba@...nel.org, netdev@...r.kernel.org, linux-nfc@...ts.01.org,
        krzysztof.kozlowski@...aro.org, davem@...emloft.net
Cc:     martin.faltesek@...il.com, christophe.ricard@...il.com,
        groeck@...gle.com, jordy@...ing.systems, krzk@...nel.org,
        mfaltesek@...gle.com, sameo@...ux.intel.com,
        theflamefire89@...il.com, duoming@....edu.cn,
        Denis Efremov <denis.e.efremov@...cle.com>
Subject: [PATCH net v2 2/3] nfc: st-nci: fix memory leaks in EVT_TRANSACTION

Error path does not free previously allocated memory. Add devm_kfree() to
the failure path.

Reported-by: Denis Efremov <denis.e.efremov@...cle.com>
Reviewed-by: Guenter Roeck <groeck@...gle.com>
Fixes: 5d1ceb7f5e56 ("NFC: st21nfcb: Add HCI transaction event support")
Signed-off-by: Martin Faltesek <mfaltesek@...gle.com>
---
 drivers/nfc/st-nci/se.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/nfc/st-nci/se.c b/drivers/nfc/st-nci/se.c
index 589e1dec78e7..fc59916ae5ae 100644
--- a/drivers/nfc/st-nci/se.c
+++ b/drivers/nfc/st-nci/se.c
@@ -339,8 +339,10 @@ static int st_nci_hci_connectivity_event_received(struct nci_dev *ndev,
 
 		/* Check next byte is PARAMETERS tag (82) */
 		if (skb->data[transaction->aid_len + 2] !=
-		    NFC_EVT_TRANSACTION_PARAMS_TAG)
+		    NFC_EVT_TRANSACTION_PARAMS_TAG) {
+			devm_kfree(dev, transaction);
 			return -EPROTO;
+		}
 
 		transaction->params_len = skb->data[transaction->aid_len + 3];
 		memcpy(transaction->params, skb->data +
-- 
2.38.1.584.g0f3c55d4c2-goog