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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 DB6FFC3F2D7 for ; Wed, 4 Mar 2020 00:14:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AEE8B20716 for ; Wed, 4 Mar 2020 00:14:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="eOE1eePM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728122AbgCDAOG (ORCPT ); Tue, 3 Mar 2020 19:14:06 -0500 Received: from hqnvemgate25.nvidia.com ([216.228.121.64]:14366 "EHLO hqnvemgate25.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727274AbgCDAOF (ORCPT ); Tue, 3 Mar 2020 19:14:05 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Tue, 03 Mar 2020 16:13:24 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Tue, 03 Mar 2020 16:14:05 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Tue, 03 Mar 2020 16:14:05 -0800 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 4 Mar 2020 00:14:02 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Wed, 4 Mar 2020 00:14:02 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Tue, 03 Mar 2020 16:14:01 -0800 From: Ralph Campbell To: , , , , CC: Jerome Glisse , John Hubbard , Christoph Hellwig , Jason Gunthorpe , "Andrew Morton" , Ben Skeggs , "Ralph Campbell" Subject: [PATCH v3 1/4] nouveau/hmm: fix vma range check for migration Date: Tue, 3 Mar 2020 16:13:36 -0800 Message-ID: <20200304001339.8248-2-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200304001339.8248-1-rcampbell@nvidia.com> References: <20200304001339.8248-1-rcampbell@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1583280804; bh=SQ1eDvDeCWzDB8hOaPPk8mCkrZrA+UiK7QY7KhDn+vA=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=eOE1eePM6U4kNNM329y8Gl5WGeldxDqUGJerZpgExUrCrxqEr4jbbUGTAOhN2xm1o aaNfMgd7ckUMRK8ruFmK+eahQJg0BgPnK9Pn/GlnWvCeCFKox5NGwWHxW4PzAergFs Qm+fdUwKbtmbvSFzOY5UnOyBcUhTh+E+U7M+mTSKAFITuIFO8bZV2f4pKuEPpVlX5g BbgkY2zK0/nvGs+5jxz/qZt8sgEoY3CCQZkLIN1nbYIN2iv7haj++OACEmoFZPfcA5 Kpnn9ffUGAQdJH3Fi8THjVMYgw6LYWRWh9Ri0qW/ciznn9oOQLzh93LFovaetPdvub s4ixUac8AM/DQ== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org find_vma_intersection(mm, start, end) only guarantees that end is greater than or equal to vma->vm_start but doesn't guarantee that start is greater than or equal to vma->vm_start. The calculation for the intersecting range in nouveau_svmm_bind() isn't accounting for this and can call migrate_vma_setup() with a starting address less than vma->vm_start. This results in migrate_vma_setup() returning -EINVAL for the range instead of nouveau skipping that part of the range and migrating the rest. Signed-off-by: Ralph Campbell --- drivers/gpu/drm/nouveau/nouveau_svm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouvea= u/nouveau_svm.c index df9bf1fd1bc0..169320409286 100644 --- a/drivers/gpu/drm/nouveau/nouveau_svm.c +++ b/drivers/gpu/drm/nouveau/nouveau_svm.c @@ -179,6 +179,7 @@ nouveau_svmm_bind(struct drm_device *dev, void *data, if (!vma) break; =20 + addr =3D max(addr, vma->vm_start); next =3D min(vma->vm_end, end); /* This is a best effort so we ignore errors */ nouveau_dmem_migrate_vma(cli->drm, vma, addr, next); --=20 2.20.1