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 524D9C43603 for ; Tue, 17 Dec 2019 14:15:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 270C721739 for ; Tue, 17 Dec 2019 14:15:42 +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="bBIh7z6x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728874AbfLQOPl (ORCPT ); Tue, 17 Dec 2019 09:15:41 -0500 Received: from esa2.hc3370-68.iphmx.com ([216.71.145.153]:49040 "EHLO esa2.hc3370-68.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728661AbfLQOPj (ORCPT ); Tue, 17 Dec 2019 09:15:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=citrix.com; s=securemail; t=1576592139; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=BCebZje1JdGYax7/evCubLel44DqnREiV6HOFXN0mVg=; b=bBIh7z6xktk8ZaBv3ABEHRHNcenTwhgGX3sEBSGAjrI1ZK1ApnZG7BLI ATQCjX/xHdR5p13T8wXz8Ugkh+cZynirHKJF9tWxszVMCikRpF7aFawFJ ToCDKsNtfCQHywnOjA+7AK5ESWPTVwHA+NGQBJi+EO0WAsTdEV6gu2x2o c=; Authentication-Results: esa2.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 (esa2.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=esa2.hc3370-68.iphmx.com; envelope-from="sergey.dyasli@citrix.com"; x-sender="sergey.dyasli@citrix.com"; x-conformance=sidf_compatible Received-SPF: Pass (esa2.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=esa2.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 (esa2.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=esa2.hc3370-68.iphmx.com; envelope-from="sergey.dyasli@citrix.com"; x-sender="postmaster@mail.citrix.com"; x-conformance=sidf_compatible IronPort-SDR: OnwOB8MZFY2HS+S16GgpO2BJod5tklhela04K9EMRgoIVuY+Bz+fAliKtL764jlR3H7RnoDJP5 fTRq9lM3PDOKpdhp351Sx3ptSDf6L1I2NYsKWNenDJGdSeotvZGp0NsZRrnoPNJ5IxRWhRvnSi x+PQgPTxbwiBlbCJ1h7yiOikObwD2yYLF+VrinHQVCXiVJ9buTQh7F+F8yTJb02QNMymHBvwH9 xIfi1VXB6pmA92ICsMD0NODPSViQqpwUzeGxlvOMCK+g4weQE2drcJL+lPJMlMuvIAOZaWdity 8+w= X-SBRS: 2.7 X-MesageID: 9817030 X-Ironport-Server: esa2.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.69,325,1571716800"; d="scan'208";a="9817030" From: Sergey Dyasli To: , , CC: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Boris Ostrovsky , Juergen Gross , "Stefano Stabellini" , George Dunlap , Ross Lagerwall , Sergey Dyasli Subject: [RFC PATCH 2/3] xen: teach KASAN about grant tables Date: Tue, 17 Dec 2019 14:08:03 +0000 Message-ID: <20191217140804.27364-3-sergey.dyasli@citrix.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191217140804.27364-1-sergey.dyasli@citrix.com> References: <20191217140804.27364-1-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. Signed-off-by: Ross Lagerwall Signed-off-by: Sergey Dyasli --- 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 49b381e104ef..0f844c14d5b9 100644 --- a/drivers/xen/grant-table.c +++ b/drivers/xen/grant-table.c @@ -1049,6 +1049,7 @@ 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; } @@ -1085,8 +1086,10 @@ 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