Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933038Ab3FEVqz (ORCPT ); Wed, 5 Jun 2013 17:46:55 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:37987 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933004Ab3FEVgB (ORCPT ); Wed, 5 Jun 2013 17:36:01 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Paolo Bonzini , Gleb Natapov Subject: [ 092/127] KVM: fix sil/dil/bpl/spl in the mod/rm fields Date: Wed, 5 Jun 2013 14:34:19 -0700 Message-Id: <20130605213228.385910585@linuxfoundation.org> X-Mailer: git-send-email 1.8.3.rc0.20.gb99dd2e In-Reply-To: <20130605213217.966891866@linuxfoundation.org> References: <20130605213217.966891866@linuxfoundation.org> User-Agent: quilt/0.60-5.1.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1437 Lines: 45 3.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Paolo Bonzini commit 8acb42070ec4c87a9baab5c7bac626030d5bef28 upstream. The x86-64 extended low-byte registers were fetched correctly from reg, but not from mod/rm. This fixes another bug in the boot of RHEL5.9 64-bit, but it is still not enough. Signed-off-by: Paolo Bonzini Signed-off-by: Gleb Natapov Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/emulate.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -1239,9 +1239,12 @@ static int decode_modrm(struct x86_emula ctxt->modrm_seg = VCPU_SREG_DS; if (ctxt->modrm_mod == 3) { + int highbyte_regs = ctxt->rex_prefix == 0; + op->type = OP_REG; op->bytes = (ctxt->d & ByteOp) ? 1 : ctxt->op_bytes; - op->addr.reg = decode_register(ctxt, ctxt->modrm_rm, ctxt->d & ByteOp); + op->addr.reg = decode_register(ctxt, ctxt->modrm_rm, + highbyte_regs && (ctxt->d & ByteOp)); if (ctxt->d & Sse) { op->type = OP_XMM; op->bytes = 16; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/