linux-kernel - [PATCH] Bluetooth: mediatek: Fix memory leak

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Message-ID: <20180814151031.GA25096@embeddedor.com>
Date:   Tue, 14 Aug 2018 10:10:31 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Sean Wang <sean.wang@...iatek.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-bluetooth@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] Bluetooth: mediatek: Fix memory leak

In case memory resources for *fw* were allocated, release them before
return.

Addresses-Coverity-ID: 1472611 ("Resource leak")
Fixes: 7237c4c9ec92 ("Bluetooth: mediatek: Add protocol support for MediaTek serial devices")
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/bluetooth/btmtkuart.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/bluetooth/btmtkuart.c b/drivers/bluetooth/btmtkuart.c
index ed2a5c7..4593baf 100644
--- a/drivers/bluetooth/btmtkuart.c
+++ b/drivers/bluetooth/btmtkuart.c
@@ -144,8 +144,10 @@ static int mtk_setup_fw(struct hci_dev *hdev)
 	fw_size = fw->size;
 
 	/* The size of patch header is 30 bytes, should be skip */
-	if (fw_size < 30)
-		return -EINVAL;
+	if (fw_size < 30) {
+		err = -EINVAL;
+		goto free_fw;
+	}
 
 	fw_size -= 30;
 	fw_ptr += 30;
@@ -172,8 +174,8 @@ static int mtk_setup_fw(struct hci_dev *hdev)
 		fw_ptr += dlen;
 	}
 
+free_fw:
 	release_firmware(fw);
-
 	return err;
 }
 
-- 
2.7.4