drm/dp/mst: fix a possible memory leak in fetch_monitor_name()

commit 6e03b13cc7d9427c2c77feed1549191015615202 upstream.

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@gmail.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20220516032042.13166-1-hbh25y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 86d13d6bc46313411c781aba075d35786a291863..b3e3babe18c0ed29b008b364bbce6e9cb450c4e0 100644 (file)
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -4834,6 +4834,7 @@ 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);
 }
 
 /**