linux-kernel - [PATCH] media: coda: jpeg: Add check for kmalloc

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Message-Id: <20220927012813.6097-1-jiasheng@iscas.ac.cn>
Date:   Tue, 27 Sep 2022 09:28:13 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     p.zabel@...gutronix.de, mchehab@...nel.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] media: coda: jpeg: Add check for kmalloc

As kmalloc can return NULL pointer, it should be better to
check the return value and return error, same as
coda_jpeg_decode_header.

Fixes: 96f6f62c4656 ("media: coda: jpeg: add CODA960 JPEG encoder support")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/media/platform/chips-media/coda-jpeg.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/chips-media/coda-jpeg.c b/drivers/media/platform/chips-media/coda-jpeg.c
index a0b22b07f69a..2284e0420934 100644
--- a/drivers/media/platform/chips-media/coda-jpeg.c
+++ b/drivers/media/platform/chips-media/coda-jpeg.c
@@ -1053,10 +1053,16 @@ static int coda9_jpeg_start_encoding(struct coda_ctx *ctx)
 		v4l2_err(&dev->v4l2_dev, "error loading Huffman tables\n");
 		return ret;
 	}
-	if (!ctx->params.jpeg_qmat_tab[0])
+	if (!ctx->params.jpeg_qmat_tab[0]) {
 		ctx->params.jpeg_qmat_tab[0] = kmalloc(64, GFP_KERNEL);
-	if (!ctx->params.jpeg_qmat_tab[1])
+		if (!ctx->params.jpeg_qmat_tab[0])
+			return -ENOMEM;
+	}
+	if (!ctx->params.jpeg_qmat_tab[1]) {
 		ctx->params.jpeg_qmat_tab[1] = kmalloc(64, GFP_KERNEL);
+		if (!ctx->params.jpeg_qmat_tab[1])
+			return -ENOMEM;
+	}
 	coda_set_jpeg_compression_quality(ctx, ctx->params.jpeg_quality);
 
 	return 0;
-- 
2.25.1