From nobody Wed Feb 11 19:09:39 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8C54D2D7DE1; Tue, 7 Oct 2025 09:44:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759830295; cv=none; b=W3RmJ0MdALSMQQAml37WDJRIzUXTE2aDiIUd0ybIkeK9RDpS5GucJZA5nHQqa1ckPI2Af+ZyB8sV++9MaZ8AQDfEBr1A7EisoF4oeXx16KtGZ/Wd3gJ2UTHsQgvm6CtO6RqJVh3ujVIwjhW+i5UKZWYO995rFocIDNKeH113hRw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759830295; c=relaxed/simple; bh=9ziipJ8QVhUYl7FNrii/r8Of1QWBSla3JzJXj5jEDSw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=f9cENwavobUBYOAcHW4UsmvqZfTB4EahSQKTsAOtrZXbYnWi61E1V7FFvSZbH4gStfjTYQkA3L8a44s1jniKch/wZtpizADUXqLn0lQWvJkVycAYs8YbwH/jZ8HrCgvmIyBg2BEzknQwWqOuExMmo2JgcbmCWGLhD/MTqxdRjTM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Seh52KZa; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Seh52KZa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A15BC113D0; Tue, 7 Oct 2025 09:44:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1759830295; bh=9ziipJ8QVhUYl7FNrii/r8Of1QWBSla3JzJXj5jEDSw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Seh52KZapGgBNv6ZL64OcFd52RIRCpmMwMMXK5xKW5E2BXJvTmqAPm3oOgO+62FuM zMenW9mjUVCzNaMreSsf3ziEiihxrE3PGW24UzqdNQuFY8q4f8StFFll/UoqfGt3UR Bcg5PapxghkaLj47JFwxkPItBrMvmD8DxJyGZkwetrBsCMNyTNNQmx59FJiykSuzFR x9XzDw17QU3/vk9sU4Sf+w6ckhpY0+EJX+ZTkUC0TD71D9qk/4zSZ1Wdx2Ze8aJot3 hZyigUZTiQ7+ygIcZe7tU/zTLf9wUwnYIFB40i5TdPn9ZeqD4GlrEK/ygMl+v2rzAi Nhn+fzizPzJNA== Received: from johan by xi.lan with local (Exim 4.98.2) (envelope-from ) id 1v64FZ-00000000360-2r37; Tue, 07 Oct 2025 11:44:53 +0200 From: Johan Hovold To: Joerg Roedel , Will Deacon Cc: Robin Murphy , Sven Peter , Janne Grunau , Rob Clark , Marek Szyprowski , Yong Wu , Matthias Brugger , AngeloGioacchino Del Regno , Chen-Yu Tsai , Thierry Reding , Krishna Reddy , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH v2 10/14] iommu/mediatek-v1: add missing larb count sanity check Date: Tue, 7 Oct 2025 11:43:23 +0200 Message-ID: <20251007094327.11734-11-johan@kernel.org> X-Mailer: git-send-email 2.49.1 In-Reply-To: <20251007094327.11734-1-johan@kernel.org> References: <20251007094327.11734-1-johan@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add the missing larb count sanity check to avoid writing beyond a fixed sized array in case of a malformed devicetree. Acked-by: Robin Murphy Signed-off-by: Johan Hovold Reviewed-by: Yong Wu --- drivers/iommu/mtk_iommu_v1.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index 44b965a2db92..55d6615a41a9 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -643,6 +643,9 @@ static int mtk_iommu_v1_probe(struct platform_device *p= dev) if (larb_nr < 0) return larb_nr; =20 + if (larb_nr > MTK_LARB_NR_MAX) + return -EINVAL; + for (i =3D 0; i < larb_nr; i++) { struct device_node *larbnode; struct platform_device *plarbdev; --=20 2.49.1