Subject: Patch "drm/mediatek/dp: fix memory leak on ->get_edid callback error
 path" has been added to the 6.6-stable tree
To: angelogioacchino.delregno@collabora.com, chunkuang.hu@kernel.org,
 ck.hu@mediatek.com, dmitry.osipenko@collabora.com,
 dri-devel@lists.freedesktop.org, granquet@baylibre.com,
 gregkh@linuxfoundation.org, jani.nikula@intel.com,
 linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org,
 matthias.bgg@gmail.com, msp@baylibre.com, p.zabel@pengutronix.de,
 rex-bc.chen@mediatek.com
From: <gregkh@linuxfoundation.org>
Date: Fri, 24 Nov 2023 13:18:58 +0000
Message-ID: <2023112458-comma-proved-ccbb@gregkh>
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Cc: stable-commits@vger.kernel.org
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This is a note to let you know that I've just added the patch titled

    drm/mediatek/dp: fix memory leak on ->get_edid callback error path

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-mediatek-dp-fix-memory-leak-on-get_edid-callback-error-path.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


From fcaf9761fd5884a64eaac48536f8c27ecfd2e6bc Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Thu, 14 Sep 2023 16:10:58 +0300
Subject: drm/mediatek/dp: fix memory leak on ->get_edid callback error path

From: Jani Nikula <jani.nikula@intel.com>

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@baylibre.com>
Cc: Guillaume Ranquet <granquet@baylibre.com>
Cc: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: <stable@vger.kernel.org> # v6.1+
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Guillaume Ranquet <granquet@baylibre.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20230914131058.2472260-1-jani.nikula@intel.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 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;
 	}
 

Patches currently in stable-queue which might be from jani.nikula@intel.com are

queue-6.6/drm-msm-dp-skip-validity-check-for-dp-cts-edid-check.patch
queue-6.6/i915-perf-fix-null-deref-bugs-with-drm_dbg-calls.patch
queue-6.6/drm-mediatek-dp-fix-memory-leak-on-get_edid-callback-error-path.patch
queue-6.6/drm-edid-fixup-h-vsync_end-instead-of-h-vtotal.patch
queue-6.6/drm-mediatek-dp-fix-memory-leak-on-get_edid-callback-audio-detection.patch
queue-6.6/drm-i915-mtl-avoid-stringop-overflow-warning.patch
queue-6.6/drm-i915-tc-fix-wformat-truncation-in-intel_tc_port_.patch