linux-kernel - [PATCH] drm: dp: fix a possible memory leak in fetch_monitor

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Message-Id: <20220516032042.13166-1-hbh25y@gmail.com>
Date:   Mon, 16 May 2022 11:20:42 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     airlied@...ux.ie, daniel@...ll.ch, lyude@...hat.com,
        tzimmermann@...e.de, jani.nikula@...el.com,
        Bhawanpreet.Lakha@....com, Wayne.Lin@....com
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Hangyu Hua <hbh25y@...il.com>
Subject: [PATCH] drm: dp: fix a possible memory leak in fetch_monitor_name()

drm_dp_mst_get_edid call kmemdup to create mst_edid. So mst_edid need to be
freed after use.

Signed-off-by: Hangyu Hua <hbh25y@...il.com>
---
 drivers/gpu/drm/dp/drm_dp_mst_topology.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/dp/drm_dp_mst_topology.c b/drivers/gpu/drm/dp/drm_dp_mst_topology.c
index 11300b53d24f..7a7cc44686f9 100644
--- a/drivers/gpu/drm/dp/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/dp/drm_dp_mst_topology.c
@@ -4852,6 +4852,7 @@ static void fetch_monitor_name(struct drm_dp_mst_topology_mgr *mgr,
 
 	mst_edid = drm_dp_mst_get_edid(port->connector, mgr, port);
 	drm_edid_get_monitor_name(mst_edid, name, namelen);
+	kfree(mst_edid);
 }
 
 /**
-- 
2.25.1