linux-kernel - [PATCH] media: mtk-vcodec: Fix reference count leak in mtk_vcodec_fw_scp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20250318110556.903-1-linmq006@gmail.com>
Date: Tue, 18 Mar 2025 19:05:53 +0800
From: Miaoqian Lin <linmq006@...il.com>
To: Tiffany Lin <tiffany.lin@...iatek.com>,
	Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
	Yunfei Dong <yunfei.dong@...iatek.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Fullway Wang <fullwaywang@...look.com>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Cc: linmq006@...il.com
Subject: [PATCH] media: mtk-vcodec: Fix reference count leak in mtk_vcodec_fw_scp_init

scp_get() returns a reference that needs to be released with scp_put().
Add missing scp_put() before returning error in mtk_vcodec_fw_scp_init().

Fixes: 53dbe0850444 ("media: mtk-vcodec: potential null pointer deference in SCP")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 .../platform/mediatek/vcodec/common/mtk_vcodec_fw_scp.c      | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

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..11ab3bc60217 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
@@ -71,7 +71,6 @@ struct mtk_vcodec_fw *mtk_vcodec_fw_scp_init(void *priv, enum mtk_vcodec_fw_use
 		pr_err("Invalid fw_use %d (use a reasonable fw id here)\n", fw_use);
 		return ERR_PTR(-EINVAL);
 	}
-
 	scp = scp_get(plat_dev);
 	if (!scp) {
 		dev_err(&plat_dev->dev, "could not get vdec scp handle");
@@ -79,8 +78,10 @@ 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;
-- 
2.39.5 (Apple Git-154)