media: mtk-vcodec: Fix reference count leak in mtk_vcodec_fw_scp_init

Commit Message

Miaoqian Lin March 18, 2025, 11:05 a.m. UTC

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 <[e-mail]>
---
 .../platform/mediatek/vcodec/common/mtk_vcodec_fw_scp.c      | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Patch

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;