From patchwork Fri Jul 1 05:39:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WW9uZyBXdSAo5ZC05YuHKQ==?= X-Patchwork-Id: 12902722 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 264EFC43334 for ; Fri, 1 Jul 2022 05:42:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=6YasBD41FwhfOmjo5cvgxXi80t0Gk3e3vNv1Z0pdEKk=; b=PU3CbCyuQlq23O P904N6j88gEWrrCgq96vNCZOGrblX9aIdKTNCEygZDsAdG8saPGSg5ksNPX+7MSeB30/8E9LvsUpq 8oNnyMcdYRwN8XRul+2PePVJlanZPM6MeYJWaAE/YtW+04F7ck8etEpJnaCws96on51xHOBBbbUCt sj+9w8F2s1RKq5v4XuZwaH94XvuCwYnjFAe0Z9NBz3JA9dF7k33f1ZhtQ4VGFSpr2ZkgAH1FFNUSy QMxVHETM4RDPcSvz7mHxtFB1AHgci2uzfiwJcrkia1uopexdUvri5RFXHoI7GX95/qrP+lrs1emzM ogRKnLJqBB+vloYmU53A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o79Os-002zNO-LA; Fri, 01 Jul 2022 05:41:06 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o79Oh-002zIh-Bk; Fri, 01 Jul 2022 05:40:56 +0000 X-UUID: 9b78f8e2bf6c4196a10e7bad08d0f19a-20220630 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.7,REQID:441fb66d-fe31-4c37-af28-e87e7d6fb7a0,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACT ION:release,TS:-5 X-CID-META: VersionHash:87442a2,CLOUDID:9cc353d6-5d6d-4eaf-a635-828a3ee48b7c,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: 9b78f8e2bf6c4196a10e7bad08d0f19a-20220630 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1992468695; Thu, 30 Jun 2022 22:40:51 -0700 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Fri, 1 Jul 2022 13:40:47 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 1 Jul 2022 13:40:45 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: , , , , , Yong Wu , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , Dan Carpenter Subject: [PATCH v3 5/7] iommu/mediatek: Validate number of phandles associated with "mediatek,larbs" Date: Fri, 1 Jul 2022 13:39:40 +0800 Message-ID: <20220701053942.3266-6-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220701053942.3266-1-yong.wu@mediatek.com> References: <20220701053942.3266-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220630_224055_445134_D57316A5 X-CRM114-Status: GOOD ( 14.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Guenter Roeck Fix the smatch warnings: drivers/iommu/mtk_iommu.c:878 mtk_iommu_mm_dts_parse() error: uninitialized symbol 'larbnode'. If someone abuse the dtsi node(Don't follow the definition of dt-binding), for example "mediatek,larbs" is provided as boolean property, "larb_nr" will be zero and cause abnormal. To fix this problem and improve the code safety, add some checking for the invalid input from dtsi, e.g. checking the larb_nr/larbid valid range, and avoid "mediatek,larb-id" property conflicts in the smi-larb nodes. Fixes: d2e9a1102cfc ("iommu/mediatek: Contain MM IOMMU flow with the MM TYPE") Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Guenter Roeck Signed-off-by: Yong Wu Reviewed-by: AngeloGioacchino Del Regno --- drivers/iommu/mtk_iommu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index aa0973bafde1..88d0dad36067 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1052,6 +1052,8 @@ static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **m larb_nr = of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NULL); if (larb_nr < 0) return larb_nr; + if (larb_nr == 0 || larb_nr > MTK_LARB_NR_MAX) + return -EINVAL; for (i = 0; i < larb_nr; i++) { u32 id; @@ -1070,6 +1072,11 @@ static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **m ret = of_property_read_u32(larbnode, "mediatek,larb-id", &id); if (ret)/* The id is consecutive if there is no this property */ id = i; + if (id >= MTK_LARB_NR_MAX) { + of_node_put(larbnode); + ret = -EINVAL; + goto err_larbdev_put; + } plarbdev = of_find_device_by_node(larbnode); of_node_put(larbnode); @@ -1077,6 +1084,11 @@ static int mtk_iommu_mm_dts_parse(struct device *dev, struct component_match **m ret = -ENODEV; goto err_larbdev_put; } + if (data->larb_imu[id].dev) { + platform_device_put(plarbdev); + ret = -EEXIST; + goto err_larbdev_put; + } data->larb_imu[id].dev = &plarbdev->dev; if (!plarbdev->dev.driver) {