From patchwork Fri Jun 19 20:35:57 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 6648601 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 33CD09F399 for ; Fri, 19 Jun 2015 21:11:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 65B46208F9 for ; Fri, 19 Jun 2015 21:11:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C6D0208F1 for ; Fri, 19 Jun 2015 21:11:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933735AbbFSVKz (ORCPT ); Fri, 19 Jun 2015 17:10:55 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:51574 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756230AbbFSUjj (ORCPT ); Fri, 19 Jun 2015 16:39:39 -0400 Received: from localhost (c-50-170-35-168.hsd1.wa.comcast.net [50.170.35.168]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 08518C00; Fri, 19 Jun 2015 20:39:04 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nicholas Mc Guire , James Hogan , Gleb Natapov , Paolo Bonzini , kvm@vger.kernel.org, linux-mips@linux-mips.org, Ralf Baechle Subject: [PATCH 4.0 067/105] MIPS: KVM: Do not sign extend on unsigned MMIO load Date: Fri, 19 Jun 2015 13:35:57 -0700 Message-Id: <20150619203600.162034362@linuxfoundation.org> X-Mailer: git-send-email 2.4.4 In-Reply-To: <20150619203558.187802739@linuxfoundation.org> References: <20150619203558.187802739@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-7.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 4.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nicholas Mc Guire commit ed9244e6c534612d2b5ae47feab2f55a0d4b4ced upstream. Fix possible unintended sign extension in unsigned MMIO loads by casting to uint16_t in the case of mmio_needed != 2. Signed-off-by: Nicholas Mc Guire Reviewed-by: James Hogan Tested-by: James Hogan Cc: Gleb Natapov Cc: Paolo Bonzini Cc: kvm@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/9985/ Signed-off-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman --- arch/mips/kvm/emulate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in --- a/arch/mips/kvm/emulate.c +++ b/arch/mips/kvm/emulate.c @@ -2101,7 +2101,7 @@ enum emulation_result kvm_mips_complete_ if (vcpu->mmio_needed == 2) *gpr = *(int16_t *) run->mmio.data; else - *gpr = *(int16_t *) run->mmio.data; + *gpr = *(uint16_t *)run->mmio.data; break; case 1: