linux-kernel - [PATCH] drm/of: Fix device node reference leak in drm_of_panel_bridge

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Message-Id: <20251028060918.65688-1-linmq006@gmail.com>
Date: Tue, 28 Oct 2025 14:09:18 +0800
From: Miaoqian Lin <linmq006@...il.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	"benjamin.gaignard@...aro.org" <benjamin.gaignard@...aro.org>,
	Philippe Cornu <philippe.cornu@...com>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Cc: linmq006@...il.com,
	stable@...r.kernel.org
Subject: [PATCH] drm/of: Fix device node reference leak in drm_of_panel_bridge_remove

of_graph_get_remote_node() returns a device node
with its reference count incremented. The caller is responsible for
releasing this reference when the node is no longer needed.

Add of_node_put(remote) to fix the reference leak.

Found via static analysis.

Fixes: c70087e8f16f ("drm/drm_of: add drm_of_panel_bridge_remove function")
Cc: stable@...r.kernel.org
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 include/drm/drm_of.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h
index 7f0256dae3f1..5940b1cd542b 100644
--- a/include/drm/drm_of.h
+++ b/include/drm/drm_of.h
@@ -171,6 +171,7 @@ static inline int drm_of_panel_bridge_remove(const struct device_node *np,
 		return -ENODEV;
 
 	bridge = of_drm_find_bridge(remote);
+	of_node_put(remote);
 	drm_panel_bridge_remove(bridge);
 
 	return 0;
-- 
2.39.5 (Apple Git-154)