linux-kernel - [PATCH] media: atomisp: Add check for rgby

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Message-ID: <20241101154823.3067891-1-lihuafei1@huawei.com>
Date: Fri, 1 Nov 2024 23:48:23 +0800
From: Li Huafei <lihuafei1@...wei.com>
To: <mchehab@...nel.org>
CC: <andy@...nel.org>, <hdegoede@...hat.com>, <sakari.ailus@...ux.intel.com>,
	<gregkh@...uxfoundation.org>, <linux-media@...r.kernel.org>,
	<linux-staging@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
	<lihuafei1@...wei.com>
Subject: [PATCH] media: atomisp: Add check for rgby_data memory allocation failure

In ia_css_3a_statistics_allocate(), there is no check on the allocation
result of the rgby_data memory. If rgby_data is not successfully
allocated, it may trigger the assert(host_stats->rgby_data) assertion in
ia_css_s3a_hmem_decode(). Adding a check to fix this potential issue.

Fixes: ad85094b293e ("Revert "media: staging: atomisp: Remove driver"")
Signed-off-by: Li Huafei <lihuafei1@...wei.com>
---
 drivers/staging/media/atomisp/pci/sh_css_params.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/media/atomisp/pci/sh_css_params.c b/drivers/staging/media/atomisp/pci/sh_css_params.c
index 232744973ab8..b1feb6f6ebe8 100644
--- a/drivers/staging/media/atomisp/pci/sh_css_params.c
+++ b/drivers/staging/media/atomisp/pci/sh_css_params.c
@@ -4181,6 +4181,8 @@ ia_css_3a_statistics_allocate(const struct ia_css_3a_grid_info *grid)
 		goto err;
 	/* No weighted histogram, no structure, treat the histogram data as a byte dump in a byte array */
 	me->rgby_data = kvmalloc(sizeof_hmem(HMEM0_ID), GFP_KERNEL);
+	if (!me->rgby_data)
+		goto err;
 
 	IA_CSS_LEAVE("return=%p", me);
 	return me;
-- 
2.25.1