* [PATCH v2] media: mtk-vcodec: potential dereference of null pointer
@ 2021-12-15 5:21 Jiasheng Jiang
2021-12-15 5:55 ` Tzung-Bi Shih
0 siblings, 1 reply; 2+ messages in thread
From: Jiasheng Jiang @ 2021-12-15 5:21 UTC (permalink / raw)
To: tiffany.lin, andrew-ct.chen, mchehab, matthias.bgg
Cc: linux-media, linux-arm-kernel, linux-mediatek, linux-kernel,
Jiasheng Jiang
The return value of devm_kzalloc() needs to be checked.
To avoid use of null pointer in case of thefailure of alloc.
Fixes: 46233e91fa24 ("media: mtk-vcodec: move firmware implementations into their own files")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
Changelog:
v1 -> v2
*Change 1. Change the return value from "-EINVAL" to "-ENOMEM".
---
drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_vpu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_vpu.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_vpu.c
index cd27f637dbe7..769228093e48 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_vpu.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_fw_vpu.c
@@ -102,6 +102,8 @@ struct mtk_vcodec_fw *mtk_vcodec_fw_vpu_init(struct mtk_vcodec_dev *dev,
vpu_wdt_reg_handler(fw_pdev, mtk_vcodec_vpu_reset_handler, dev, rst_id);
fw = devm_kzalloc(&dev->plat_dev->dev, sizeof(*fw), GFP_KERNEL);
+ if (!fw)
+ return ERR_PTR(-ENOMEM);
fw->type = VPU;
fw->ops = &mtk_vcodec_vpu_msg;
fw->pdev = fw_pdev;
--
2.25.1
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* Re: [PATCH v2] media: mtk-vcodec: potential dereference of null pointer
2021-12-15 5:21 [PATCH v2] media: mtk-vcodec: potential dereference of null pointer Jiasheng Jiang
@ 2021-12-15 5:55 ` Tzung-Bi Shih
0 siblings, 0 replies; 2+ messages in thread
From: Tzung-Bi Shih @ 2021-12-15 5:55 UTC (permalink / raw)
To: Jiasheng Jiang
Cc: tiffany.lin, andrew-ct.chen, mchehab, matthias.bgg, linux-media,
linux-arm-kernel, linux-mediatek, linux-kernel
On Wed, Dec 15, 2021 at 01:21:57PM +0800, Jiasheng Jiang wrote:
> The return value of devm_kzalloc() needs to be checked.
> To avoid use of null pointer in case of thefailure of alloc.
>
> Fixes: 46233e91fa24 ("media: mtk-vcodec: move firmware implementations into their own files")
> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
With a nit:
s/thefailure/the failure/
Reviewed-by: Tzung-Bi Shih <tzungbi@google.com>
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