linux-kernel - [PATCH 2/3] memory: mtk-smi: fix device leak on larb probe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20251121164624.13685-3-johan@kernel.org>
Date: Fri, 21 Nov 2025 17:46:23 +0100
From: Johan Hovold <johan@...nel.org>
To: Yong Wu <yong.wu@...iatek.com>,
	Krzysztof Kozlowski <krzk@...nel.org>
Cc: Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	linux-mediatek@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Johan Hovold <johan@...nel.org>,
	stable@...r.kernel.org,
	Miaoqian Lin <linmq006@...il.com>
Subject: [PATCH 2/3] memory: mtk-smi: fix device leak on larb probe

Make sure to drop the reference taken when looking up the SMI device
during larb probe on late probe failure (e.g. probe deferral) and on
driver unbind.

Fixes: cc8bbe1a8312 ("memory: mediatek: Add SMI driver")
Fixes: 038ae37c510f ("memory: mtk-smi: add missing put_device() call in mtk_smi_device_link_common")
Cc: stable@...r.kernel.org	# 4.6: 038ae37c510f
Cc: Yong Wu <yong.wu@...iatek.com>
Cc: Miaoqian Lin <linmq006@...il.com>
Signed-off-by: Johan Hovold <johan@...nel.org>
---
 drivers/memory/mtk-smi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index dd6150d200e8..3609bfd3c64b 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -685,6 +685,7 @@ static void mtk_smi_larb_remove(struct platform_device *pdev)
 	device_link_remove(&pdev->dev, larb->smi_common_dev);
 	pm_runtime_disable(&pdev->dev);
 	component_del(&pdev->dev, &mtk_smi_larb_component_ops);
+	put_device(larb->smi_common_dev);
 }
 
 static int __maybe_unused mtk_smi_larb_resume(struct device *dev)
-- 
2.51.2