linux-kernel - [PATCH v6 3/5] media: imx-jpeg: Cleanup after an allocation error

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Message-ID: <20250421081301.1304-4-ming.qian@oss.nxp.com>
Date: Mon, 21 Apr 2025 16:12:54 +0800
From: ming.qian@....nxp.com
To: mchehab@...nel.org,
	hverkuil-cisco@...all.nl,
	mirela.rabulea@....nxp.com
Cc: nicolas@...fresne.ca,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	xiahong.bao@....com,
	eagle.zhou@....com,
	linux-imx@....com,
	imx@...ts.linux.dev,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v6 3/5] media: imx-jpeg: Cleanup after an allocation error

From: Ming Qian <ming.qian@....nxp.com>

When allocation failures are not cleaned up by the driver, further
allocation errors will be false-positives, which will cause buffers to
remain uninitialized and cause NULL pointer dereferences.
Ensure proper cleanup of failed allocations to prevent these issues.

Fixes: 2db16c6ed72c ("media: imx-jpeg: Add V4L2 driver for i.MX8 JPEG Encoder/Decoder")
Signed-off-by: Ming Qian <ming.qian@....nxp.com>
Reviewed-by: Frank Li <Frank.Li@....com>
---
v3
- Split the moving of code into a separate patch

v2
- Add the Fixes tag
- Improve commit message
---
 drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
index 29d3d4b08dd1..8a25ea8905ae 100644
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
@@ -820,6 +820,7 @@ static bool mxc_jpeg_alloc_slot_data(struct mxc_jpeg_dev *jpeg)
 	return true;
 err:
 	dev_err(jpeg->dev, "Could not allocate descriptors for slot %d", jpeg->slot_data.slot);
+	mxc_jpeg_free_slot_data(jpeg);
 
 	return false;
 }
-- 
2.43.0-rc1