linux-kernel - [PATCH] drm/komeda: Add check for komeda_get_layer_fourcc

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Message-Id: <20241211025712.824391-1-haoxiang_li2024@163.com>
Date: Wed, 11 Dec 2024 10:57:12 +0800
From: Haoxiang Li <haoxiang_li2024@....com>
To: liviu.dudau@....com,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch,
	ayan.halder@....com,
	james.qian.wang@....com
Cc: dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Haoxiang Li <haoxiang_li2024@....com>,
	stable@...r.kernel.org
Subject: [PATCH] drm/komeda: Add check for komeda_get_layer_fourcc_list()

Add check for the return value of komeda_get_layer_fourcc_list()
to catch the potential exception.

Fixes: 5d51f6c0da1b ("drm/komeda: Add writeback support")
Cc: stable@...r.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@....com>
---
 drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
index ebccb74306a7..f30b3d5eeca5 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
@@ -160,6 +160,10 @@ static int komeda_wb_connector_add(struct komeda_kms_dev *kms,
 	formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
 					       kwb_conn->wb_layer->layer_type,
 					       &n_formats);
+	if (!formats) {
+		kfree(kwb_conn);
+		return -ENOMEM;
+	}
 
 	err = drm_writeback_connector_init(&kms->base, wb_conn,
 					   &komeda_wb_connector_funcs,
-- 
2.25.1