linux-kernel - [PATCH v2] media: mediatek: vcodec: Fix a resource leak related to the scp device in FW initialization

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Message-Id: <20250218185809.37130-1-jiashengjiangcool@gmail.com>
Date: Tue, 18 Feb 2025 18:58:09 +0000
From: Jiasheng Jiang <jiashengjiangcool@...il.com>
To: sebastian.fricke@...labora.com
Cc: andrew-ct.chen@...iatek.com,
	angelogioacchino.delregno@...labora.com,
	fullwaywang@...look.com,
	jiashengjiangcool@...il.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org,
	linux-mediatek@...ts.infradead.org,
	matthias.bgg@...il.com,
	mchehab@...nel.org,
	tiffany.lin@...iatek.com,
	yunfei.dong@...iatek.com
Subject: [PATCH v2] media: mediatek: vcodec: Fix a resource leak related to the scp device in FW initialization

On Mediatek devices with a system companion processor (SCP) the mtk_scp
structure has to be removed explicitly to avoid a resource leak.
Free the structure in case the allocation of the firmware structure fails
during the firmware initialization.

Fixes: 53dbe0850444 ("media: mtk-vcodec: potential null pointer deference in SCP")
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@...il.com>
---
Changelog:

v1 -> v2:

1. Reword the commit message to give more context.
---
 .../platform/mediatek/vcodec/common/mtk_vcodec_fw_scp.c      | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_scp.c b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_scp.c
index ff23b225db70..1b0bc47355c0 100644
--- a/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_scp.c
+++ b/drivers/media/platform/mediatek/vcodec/common/mtk_vcodec_fw_scp.c
@@ -79,8 +79,11 @@ struct mtk_vcodec_fw *mtk_vcodec_fw_scp_init(void *priv, enum mtk_vcodec_fw_use
 	}
 
 	fw = devm_kzalloc(&plat_dev->dev, sizeof(*fw), GFP_KERNEL);
-	if (!fw)
+	if (!fw) {
+		scp_put(scp);
 		return ERR_PTR(-ENOMEM);
+	}
+
 	fw->type = SCP;
 	fw->ops = &mtk_vcodec_rproc_msg;
 	fw->scp = scp;
-- 
2.25.1