From: Johan Hovold <johan@kernel.org>
To: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
Guangshuo Li <lgs201920130244@gmail.com>,
linux-media@vger.kernel.org, linux-mediatek@lists.infradead.org,
linux-kernel@vger.kernel.org, Johan Hovold <johan@kernel.org>,
stable@vger.kernel.org, Moudy Ho <moudy.ho@mediatek.com>
Subject: [PATCH] media: platform: mtk-mdp3: fix NULL deref on failed SCP lookup
Date: Mon, 6 Jul 2026 08:59:27 +0200 [thread overview]
Message-ID: <20260706065927.389604-1-johan@kernel.org> (raw)
Add the missing sanity check after looking up the SCP to avoid
dereferencing a NULL-pointer in case its driver has not yet been bound.
Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Cc: stable@vger.kernel.org # 6.1
Cc: Moudy Ho <moudy.ho@mediatek.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
This one applies on top of Guangshuo's fix:
https://lore.kernel.org/r/20260704173119.254975-1-lgs201920130244@gmail.com
Johan
drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
index 121b1006ffdc..f412aadb5996 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
@@ -296,6 +296,11 @@ static int mdp_probe(struct platform_device *pdev)
mdp->scp = platform_get_drvdata(mm_pdev);
}
+ if (!mdp->scp) {
+ ret = -EPROBE_DEFER;
+ goto err_destroy_clock_wq;
+ }
+
mdp->rproc_handle = scp_get_rproc(mdp->scp);
dev_dbg(&pdev->dev, "MDP rproc_handle: %p", mdp->rproc_handle);
--
2.54.0
reply other threads:[~2026-07-06 6:59 UTC|newest]
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