From patchwork Wed Aug 24 06:43:04 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: 12952971 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 8A4FCC00140 for ; Wed, 24 Aug 2022 06:56:23 +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=W028KSp2kdsRzvI0GrvkhR1STyD/EmoiR/lIUK6/qPg=; b=evMX1ueuTed2jz eNodzv4PaPY0ToSIKLV6fxZPvC/UwFPQzAPtUhqn7RglpgIE+9qEhnKQVclxi6wtxmD0x3hpzoAqT LjDoJxiPhUOA8VuCIqZGGrz11bayuEJT9nfQdHdWoeIhW7GCpURok6/ekF2op2fqWPX5mNhyCnMxn A+FOrHoVJYwNcXgo0UsTMbjTvciXu5eFvBkeh4SR53ZZWdQXnedB+y/9QxxeVq3GZUzToyOn6pBvG Bp2Rmqyq8qyC5BvuafNzOh7g/7xxAW5iT3EA2wyethqCCH2IZDUuNlKyFUbjBMX08geOaQoTMtDzR gBRIn6PjddjK1zVhv6MA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oQkIO-00B0lS-2k; Wed, 24 Aug 2022 06:55:24 +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 1oQkIJ-00B0kF-Lc; Wed, 24 Aug 2022 06:55:21 +0000 X-UUID: 37699a537b164f0487a34635f5e7472b-20220823 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=p10kD+gTdAN7sPfTgPFIBsiL3UbFKgINASKfJF4tRJE=; b=K6j1eQqh9J+BbgHB8I+yj5u5yc/5tHzOO/zRHxKDz2XPElOsFLo3f+z5zmv5TFF/Nf6GBD1mgBBk3cckv5baeE4IA9q33WXDdTnInCY8Els+oY7SZ/24nh5vzfWxSNIMzblZppMFGRZYtDyjeDVdMXwPMXaN/s8I9+0RmK/XLs4=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.10,REQID:7ef212b9-64b1-4752-87fa-d27186e5fd18,OB:0,L OB:0,IP:0,URL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Releas e_Ham,ACTION:release,TS:-25 X-CID-META: VersionHash:84eae18,CLOUDID:60b2a1c9-6b09-4f60-bf82-12f039f5d530,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,Bulk:nil,QS:nil,BEC:nil,COL:0 X-UUID: 37699a537b164f0487a34635f5e7472b-20220823 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 1154917871; Tue, 23 Aug 2022 23:55:13 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Wed, 24 Aug 2022 14:44:00 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Wed, 24 Aug 2022 14:43:59 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Will Deacon CC: Robin Murphy , , , , , , "Yong Wu" , AngeloGioacchino Del Regno , , , , , , , , Guenter Roeck , "Dan Carpenter" Subject: [PATCH v4 4/6] iommu/mediatek: Validate number of phandles associated with "mediatek,larbs" Date: Wed, 24 Aug 2022 14:43:04 +0800 Message-ID: <20220824064306.21495-5-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220824064306.21495-1-yong.wu@mediatek.com> References: <20220824064306.21495-1-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-20220823_235519_713367_5D18A8C0 X-CRM114-Status: GOOD ( 16.50 ) 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 f63d4210043d..21195ac060f1 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -1048,6 +1048,8 @@ 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; @@ -1066,6 +1068,11 @@ 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); @@ -1073,6 +1080,11 @@ 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) {