From nobody Mon Feb 9 17:37:39 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1552384520059412.2173048332942; Tue, 12 Mar 2019 02:55:20 -0700 (PDT) Received: from localhost ([127.0.0.1]:48534 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h3e7x-00034B-1W for importer@patchew.org; Tue, 12 Mar 2019 05:55:17 -0400 Received: from eggs.gnu.org ([209.51.188.92]:52365) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h3dU2-0007RC-Ms for qemu-devel@nongnu.org; Tue, 12 Mar 2019 05:14:03 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h3dHc-0006KZ-T8 for qemu-devel@nongnu.org; Tue, 12 Mar 2019 05:01:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52452) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h3dHc-0006KA-MC; Tue, 12 Mar 2019 05:01:12 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id C89CC3082B3F; Tue, 12 Mar 2019 08:54:27 +0000 (UTC) Received: from umbus.redhat.com (vpn2-54-33.bne.redhat.com [10.64.54.33]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5364E6013E; Tue, 12 Mar 2019 08:54:24 +0000 (UTC) From: David Gibson To: peter.maydell@linaro.org Date: Tue, 12 Mar 2019 19:52:32 +1100 Message-Id: <20190312085316.8054-19-dgibson@redhat.com> In-Reply-To: <20190312085316.8054-1-dgibson@redhat.com> References: <20190312085316.8054-1-dgibson@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.45]); Tue, 12 Mar 2019 08:54:27 +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] [PULL 18/62] spapr: Force SPAPR_MEMORY_BLOCK_SIZE to be a hwaddr (64-bit) X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: lvivier@redhat.com, clg@kaod.org, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, groug@kaod.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: David Gibson SPAPR_MEMORY_BLOCK_SIZE is logically a difference in memory addresses, and hence of type hwaddr which is 64-bit. Previously it wasn't marked as such which means that it could be treated as 32-bit. That will work in some circumstances but if multiplied by another 32-bit value it could lead to a 32-bit overflow and an incorrect result. One specific instance of this in spapr_lmb_dt_populate() was spotted by Coverity (CID 1399145). Reported-by: Peter Maydell Signed-off-by: David Gibson --- include/hw/ppc/spapr.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index ff1bd60615..1311ebe28e 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -792,7 +792,7 @@ int spapr_rtc_import_offset(sPAPRRTCState *rtc, int64_t= legacy_offset); =20 #define TYPE_SPAPR_RNG "spapr-rng" =20 -#define SPAPR_MEMORY_BLOCK_SIZE (1 << 28) /* 256MB */ +#define SPAPR_MEMORY_BLOCK_SIZE ((hwaddr)1 << 28) /* 256MB */ =20 /* * This defines the maximum number of DIMM slots we can have for sPAPR --=20 2.20.1