From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A62D0C4332E for ; Mon, 1 Mar 2021 18:18:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7371C64E38 for ; Mon, 1 Mar 2021 18:18:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239653AbhCASST (ORCPT ); Mon, 1 Mar 2021 13:18:19 -0500 Received: from mail.kernel.org ([198.145.29.99]:34036 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239101AbhCASLp (ORCPT ); Mon, 1 Mar 2021 13:11:45 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1B03E64DEE; Mon, 1 Mar 2021 17:17:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614619077; bh=XpuIIt5tVi/1qFX4GjuPiteoy8HqO4ZifEwwwuaaDCE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SG+QFG1qfDHCtwLAGOXUAaZ065Yz6/rgUE7o0VYsE2ULl7cbajbtTLq1WWxhHQrOA ZTYBSy23LrDnVorABUIDs2rwzhrZGlhcs6QRMn8NMoM5ZUudT1fn1u7rl17nR3wuKT zYhMNl/cfVazcF4KIehyGoCSsRY9Qsj4pPKQMVoI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yong Wu , Robin Murphy , Will Deacon , Sasha Levin Subject: [PATCH 5.10 322/663] iommu: Switch gather->end to the inclusive end Date: Mon, 1 Mar 2021 17:09:30 +0100 Message-Id: <20210301161157.779898055@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161141.760350206@linuxfoundation.org> References: <20210301161141.760350206@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Yong Wu [ Upstream commit 862c3715de8f3e5350489240c951d697f04bd8c9 ] Currently gather->end is "unsigned long" which may be overflow in arch32 in the corner case: 0xfff00000 + 0x100000(iova + size). Although it doesn't affect the size(end - start), it affects the checking "gather->end < end" This patch changes this "end" to the real end address (end = start + size - 1). Correspondingly, update the length to "end - start + 1". Fixes: a7d20dc19d9e ("iommu: Introduce struct iommu_iotlb_gather for batching TLB flushes") Signed-off-by: Yong Wu Reviewed-by: Robin Murphy Acked-by: Will Deacon Link: https://lore.kernel.org/r/20210107122909.16317-5-yong.wu@mediatek.com Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +- drivers/iommu/mtk_iommu.c | 2 +- include/linux/iommu.h | 4 ++-- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index e634bbe605730..7067b7c116260 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2267,7 +2267,7 @@ static void arm_smmu_iotlb_sync(struct iommu_domain *domain, { struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); - arm_smmu_tlb_inv_range(gather->start, gather->end - gather->start, + arm_smmu_tlb_inv_range(gather->start, gather->end - gather->start + 1, gather->pgsize, true, smmu_domain); } diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index c072cee532c20..19387d2bc4b4f 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -445,7 +445,7 @@ static void mtk_iommu_iotlb_sync(struct iommu_domain *domain, struct iommu_iotlb_gather *gather) { struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); - size_t length = gather->end - gather->start; + size_t length = gather->end - gather->start + 1; if (gather->start == ULONG_MAX) return; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 9bbcfe3b0bb12..f11f5072af5dc 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -169,7 +169,7 @@ enum iommu_dev_features { * struct iommu_iotlb_gather - Range information for a pending IOTLB flush * * @start: IOVA representing the start of the range to be flushed - * @end: IOVA representing the end of the range to be flushed (exclusive) + * @end: IOVA representing the end of the range to be flushed (inclusive) * @pgsize: The interval at which to perform the flush * * This structure is intended to be updated by multiple calls to the @@ -536,7 +536,7 @@ static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain, struct iommu_iotlb_gather *gather, unsigned long iova, size_t size) { - unsigned long start = iova, end = start + size; + unsigned long start = iova, end = start + size - 1; /* * If the new page is disjoint from the current range or is mapped at -- 2.27.0