[PATCH 4.9 17/62] nfc: st-nci: fix memory leaks in EVT_TRANSACTION

Greg Kroah-Hartman
2022-12-05T19:13:18Z

From: Martin Faltesek <mfaltesek@google.com>

[ Upstream commit 440f2ae9c9f06e26f5dcea697a53717fc61a318c ]

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

Reported-by: Denis Efremov <denis.e.efremov@oracle.com>
Reviewed-by: Guenter Roeck <groeck@google.com>
Fixes: 5d1ceb7f5e56 ("NFC: st21nfcb: Add HCI transaction event support")
Signed-off-by: Martin Faltesek <mfaltesek@google.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 e75929ff330e..b1d23b35aac4 100644
--- a/drivers/nfc/st-nci/se.c
+++ b/drivers/nfc/st-nci/se.c
@@ -352,8 +352,10 @@ 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 +
--
2.35.1