From nobody Sun Feb 8 03:53:42 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4E0AC32772 for ; Tue, 23 Aug 2022 09:29:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350454AbiHWJ3z (ORCPT ); Tue, 23 Aug 2022 05:29:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348812AbiHWJ1e (ORCPT ); Tue, 23 Aug 2022 05:27:34 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 017BF915F7; Tue, 23 Aug 2022 01:37:19 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A558BB81C4F; Tue, 23 Aug 2022 08:36:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6C44C433C1; Tue, 23 Aug 2022 08:36:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1661243782; bh=B3zwTcB/xhXEugosPjzJlf0j/Duf78YLQt3ExNWz/Co=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=coJ2cnWm016p45/vdQMGvPwK7rkcS/KcBB7njdKEC81/R6fzWlZqZia6ujE0Awh2m KB4ICjG3alO+S/56NdDVD2P5mb1phD/pcWOAxZvXTl9B6lu38UTY5umONGi3NX7jhh 7wDgU0TYwyHCPcYlnccKUS+zv6C5LoPUirDuUeQU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sean Christopherson , Maxim Levitsky Subject: [PATCH 4.14 020/229] KVM: x86: Set error code to segment selector on LLDT/LTR non-canonical #GP Date: Tue, 23 Aug 2022 10:23:01 +0200 Message-Id: <20220823080054.161410421@linuxfoundation.org> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20220823080053.202747790@linuxfoundation.org> References: <20220823080053.202747790@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Sean Christopherson commit 2626206963ace9e8bf92b6eea5ff78dd674c555c upstream. When injecting a #GP on LLDT/LTR due to a non-canonical LDT/TSS base, set the error code to the selector. Intel SDM's says nothing about the #GP, but AMD's APM explicitly states that both LLDT and LTR set the error code to the selector, not zero. Note, a non-canonical memory operand on LLDT/LTR does generate a #GP(0), but the KVM code in question is specific to the base from the descriptor. Fixes: e37a75a13cda ("KVM: x86: Emulator ignores LDTR/TR extended base on L= LDT/LTR") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson Reviewed-by: Maxim Levitsky Link: https://lore.kernel.org/r/20220711232750.1092012-3-seanjc@google.com Signed-off-by: Sean Christopherson Signed-off-by: Greg Kroah-Hartman --- arch/x86/kvm/emulate.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -1758,8 +1758,8 @@ static int __load_segment_descriptor(str if (ret !=3D X86EMUL_CONTINUE) return ret; if (emul_is_noncanonical_address(get_desc_base(&seg_desc) | - ((u64)base3 << 32), ctxt)) - return emulate_gp(ctxt, 0); + ((u64)base3 << 32), ctxt)) + return emulate_gp(ctxt, err_code); } =20 if (seg =3D=3D VCPU_SREG_TR) {