[PATCH 6.6 461/530] drm/mediatek/dp: fix memory leak on ->get_edid callback error path

[Greg Kroah-Hartman]

6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jani Nikula <jani.nikula@xxxxxxxxx>

commit fcaf9761fd5884a64eaac48536f8c27ecfd2e6bc upstream.

Setting new_edid to NULL leaks the buffer.

Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver")
Cc: Markus Schneider-Pargmann <msp@xxxxxxxxxxxx>
Cc: Guillaume Ranquet <granquet@xxxxxxxxxxxx>
Cc: Bo-Chen Chen <rex-bc.chen@xxxxxxxxxxxx>
Cc: CK Hu <ck.hu@xxxxxxxxxxxx>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Cc: Dmitry Osipenko <dmitry.osipenko@xxxxxxxxxxxxx>
Cc: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-mediatek@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v6.1+
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Reviewed-by: Guillaume Ranquet <granquet@xxxxxxxxxxxx>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20230914131058.2472260-1-jani.nikula@xxxxxxxxx/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/mediatek/mtk_dp.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/mediatek/mtk_dp.c
+++ b/drivers/gpu/drm/mediatek/mtk_dp.c
@@ -2048,6 +2048,7 @@ static struct edid *mtk_dp_get_edid(stru
 	 */
 	if (mtk_dp_parse_capabilities(mtk_dp)) {
 		drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
+		kfree(new_edid);
 		new_edid = NULL;
 	}