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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS 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 8878DC3A59E for ; Mon, 26 Aug 2019 07:53:37 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 621FD2173E for ; Mon, 26 Aug 2019 07:53:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 621FD2173E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:50592 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i29ol-0001sS-S5 for qemu-devel@archiver.kernel.org; Mon, 26 Aug 2019 03:53:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41950) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i29mp-00006u-4T for qemu-devel@nongnu.org; Mon, 26 Aug 2019 03:51:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i29mn-0002m2-3x for qemu-devel@nongnu.org; Mon, 26 Aug 2019 03:51:35 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34274) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i29ml-0002lB-7t; Mon, 26 Aug 2019 03:51:31 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7FB9C307D915; Mon, 26 Aug 2019 07:51:30 +0000 (UTC) Received: from t460s.redhat.com (ovpn-116-227.ams2.redhat.com [10.36.116.227]) by smtp.corp.redhat.com (Postfix) with ESMTP id D2F746CE58; Mon, 26 Aug 2019 07:51:27 +0000 (UTC) From: David Hildenbrand To: qemu-devel@nongnu.org Date: Mon, 26 Aug 2019 09:51:07 +0200 Message-Id: <20190826075112.25637-3-david@redhat.com> In-Reply-To: <20190826075112.25637-1-david@redhat.com> References: <20190826075112.25637-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Mon, 26 Aug 2019 07:51:30 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 2/7] s390x/tcg: Fix length calculation in probe_write_access() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , Riku Voipio , Eduardo Habkost , David Hildenbrand , Aleksandar Rikalo , Cornelia Huck , Richard Henderson , Aleksandar Markovic , qemu-s390x@nongnu.org, Paolo Bonzini , Aurelien Jarno , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hm... how did that "-" slip in (-TAGRET_PAGE_SIZE would be correct). This currently makes us exceed one page in a single probe_write() call, essentially leaving some memory unchecked. Fixes: c5a7392cfb96 ("s390x/tcg: Provide probe_write_access helper") Reviewed-by: Richard Henderson Signed-off-by: David Hildenbrand --- target/s390x/mem_helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 7819aca15d..4b43440e89 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -2623,7 +2623,7 @@ void probe_write_access(CPUS390XState *env, uint64_= t addr, uint64_t len, #else /* test the actual access, not just any access to the page due to LA= P */ while (len) { - const uint64_t pagelen =3D -(addr | -TARGET_PAGE_MASK); + const uint64_t pagelen =3D -(addr | TARGET_PAGE_MASK); const uint64_t curlen =3D MIN(pagelen, len); =20 probe_write(env, addr, curlen, cpu_mmu_index(env, false), ra); --=20 2.21.0