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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 A5B8CC282DD for ; Wed, 8 Jan 2020 15:28:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7A95420720 for ; Wed, 8 Jan 2020 15:28:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=citrix.com header.i=@citrix.com header.b="diAYzHGk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728600AbgAHP2T (ORCPT ); Wed, 8 Jan 2020 10:28:19 -0500 Received: from esa5.hc3370-68.iphmx.com ([216.71.155.168]:3495 "EHLO esa5.hc3370-68.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726556AbgAHP2T (ORCPT ); Wed, 8 Jan 2020 10:28:19 -0500 X-Greylist: delayed 426 seconds by postgrey-1.27 at vger.kernel.org; Wed, 08 Jan 2020 10:28:18 EST DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=citrix.com; s=securemail; t=1578497298; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=CBiNfqLK+RYJY53+Zy5oTUVCpIc9aHTTwEyGVMnpP8M=; b=diAYzHGkzhe/SyNTm70SpGJgD0TDMxnQDhHQRZBFqrr7RPMV33KJOLMq ZLHFlSvE/a8mzS0NBjoM976NJUqSAa8CLXIGCp8y69k+UYqQY6VWyJEAl euWqyrBtgu8l8VqgRU6mHf3Ka/D1VPGrwnejLExUW3elUOdrgq4xE9ceU k=; Authentication-Results: esa5.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none; spf=None smtp.pra=sergey.dyasli@citrix.com; spf=Pass smtp.mailfrom=sergey.dyasli@citrix.com; spf=None smtp.helo=postmaster@mail.citrix.com Received-SPF: None (esa5.hc3370-68.iphmx.com: no sender authenticity information available from domain of sergey.dyasli@citrix.com) identity=pra; client-ip=162.221.158.21; receiver=esa5.hc3370-68.iphmx.com; envelope-from="sergey.dyasli@citrix.com"; x-sender="sergey.dyasli@citrix.com"; x-conformance=sidf_compatible Received-SPF: Pass (esa5.hc3370-68.iphmx.com: domain of sergey.dyasli@citrix.com designates 162.221.158.21 as permitted sender) identity=mailfrom; client-ip=162.221.158.21; receiver=esa5.hc3370-68.iphmx.com; envelope-from="sergey.dyasli@citrix.com"; x-sender="sergey.dyasli@citrix.com"; x-conformance=sidf_compatible; x-record-type="v=spf1"; x-record-text="v=spf1 ip4:209.167.231.154 ip4:178.63.86.133 ip4:195.66.111.40/30 ip4:85.115.9.32/28 ip4:199.102.83.4 ip4:192.28.146.160 ip4:192.28.146.107 ip4:216.52.6.88 ip4:216.52.6.188 ip4:162.221.158.21 ip4:162.221.156.83 ip4:168.245.78.127 ~all" Received-SPF: None (esa5.hc3370-68.iphmx.com: no sender authenticity information available from domain of postmaster@mail.citrix.com) identity=helo; client-ip=162.221.158.21; receiver=esa5.hc3370-68.iphmx.com; envelope-from="sergey.dyasli@citrix.com"; x-sender="postmaster@mail.citrix.com"; x-conformance=sidf_compatible IronPort-SDR: TqQkzmi9JuPNn7Gy/JzerQopbW+J7Eg/HSvyodqgKwy6liyt49GclLM2WQADT6NXTl/kZ1p9du CB4UFLD6ASxEzL/NopyZoPRTvUJtMdivzl3aoQZxabTiYizCWjwv79t8XuBMkzX7EwggzZ5f7f akop21WbU3fEBVEfVMqKZd4pJlcm3cFSfFwHD9lr0HEnFYtOObpdUw54kRdENEoSPEmA10/AUG I/1BaEq0Xz7pvyfyQ5KUeoqXtJZyfi9TrJLmDoPbTN07bw6Li+uwoY0bWydcCWLSGwnyQoo4SG iuU= X-SBRS: 2.7 X-MesageID: 11004133 X-Ironport-Server: esa5.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.69,410,1571716800"; d="scan'208";a="11004133" From: Sergey Dyasli To: , , , CC: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Boris Ostrovsky , Juergen Gross , "Stefano Stabellini" , George Dunlap , Ross Lagerwall , Andrew Morton , Sergey Dyasli Subject: [PATCH v1 3/4] xen: teach KASAN about grant tables Date: Wed, 8 Jan 2020 15:20:59 +0000 Message-ID: <20200108152100.7630-4-sergey.dyasli@citrix.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200108152100.7630-1-sergey.dyasli@citrix.com> References: <20200108152100.7630-1-sergey.dyasli@citrix.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ross Lagerwall Otherwise it produces lots of false positives when a guest starts using PV I/O devices. Signed-off-by: Ross Lagerwall Signed-off-by: Sergey Dyasli --- RFC --> v1: - Slightly clarified the commit message --- drivers/xen/grant-table.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c index 7b36b51cdb9f..ce95f7232de6 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -1048,6 +1048,7 @@ int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops, foreign = xen_page_foreign(pages[i]); foreign->domid = map_ops[i].dom; foreign->gref = map_ops[i].ref; + kasan_alloc_pages(pages[i], 0); break; } @@ -1084,8 +1085,10 @@ int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops, if (ret) return ret; - for (i = 0; i < count; i++) + for (i = 0; i < count; i++) { ClearPageForeign(pages[i]); + kasan_free_pages(pages[i], 0); + } return clear_foreign_p2m_mapping(unmap_ops, kunmap_ops, pages, count); } -- 2.17.1