From nobody Wed Dec 17 05:47:50 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1765372838; cv=none; d=zohomail.com; s=zohoarc; b=FEXN5FvZXN5WWz1bWJwmpE/iUkJsY8eLPy1439hWnM8ucKEFqrLiY7fy5GQUn8jP9zXu299ywdBbb3vVUAbW6Zn3/ncox5MKWd9ZKkBQTCbeyr3lK6JbHHTkVp7aTREbsZB25nIRP2JngCwAYScmqElkxEWc2inEXqq1ClmQWrI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1765372838; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=6jBtFYWwdIR8B69gtY/Q+wADcN5do127ZO/G3eZnzAQ=; b=epcjwR/xez/8De/ALanrS6U69a3CU3qlcUbkdtlAXxb/2g3+FML+qvjFX4mp/61oaJ2ZIYpimu9R2uDqS3/ReIjpizxZbu/f73yrZxAMiCPmbaMXqCV/6KntVWcl5MRsccvdcTO4P6qU/kYW5xJWr0atkpwDd4l86ZUA1NGVhLM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 176537283860319.150892381571794; Wed, 10 Dec 2025 05:20:38 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vTK4E-0004oW-S7; Wed, 10 Dec 2025 08:17:18 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vTK42-0004lt-0B for qemu-devel@nongnu.org; Wed, 10 Dec 2025 08:17:07 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vTK3y-0002xX-53 for qemu-devel@nongnu.org; Wed, 10 Dec 2025 08:17:05 -0500 Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-621-4Yw7rOD0OpmXr2uiWTcM1A-1; Wed, 10 Dec 2025 08:16:59 -0500 Received: by mail-wr1-f69.google.com with SMTP id ffacd0b85a97d-42e2e3c2cccso5060653f8f.3 for ; Wed, 10 Dec 2025 05:16:58 -0800 (PST) Received: from [192.168.10.48] ([151.95.145.106]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42f7d352a52sm38531284f8f.38.2025.12.10.05.16.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Dec 2025 05:16:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1765372620; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6jBtFYWwdIR8B69gtY/Q+wADcN5do127ZO/G3eZnzAQ=; b=BiSRCmPOOdl4YTZ5o4W10uMLTPWf1CWhi8J4S8KTrP0zBK0rlnnRZku6iqpvCee7ANjwPh nKe6wQPo2YCdW7CVKVPaC2Dx8zsJwm1MMd6KggtIMVU7Tq3TK+wd/D855tmvba3u+upSh1 jJhRpxpMloTBHZqSMALTlsLWWG0GMU4= X-MC-Unique: 4Yw7rOD0OpmXr2uiWTcM1A-1 X-Mimecast-MFC-AGG-ID: 4Yw7rOD0OpmXr2uiWTcM1A_1765372618 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1765372617; x=1765977417; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=6jBtFYWwdIR8B69gtY/Q+wADcN5do127ZO/G3eZnzAQ=; b=EoP3+rp+BKk0BfB4FNqUgkB+ARfPlXNDwVDZfnDwa4R8GNQSJEYxOY8G6ZnT/c7knw ltoLJZ4znwXFjxJpyFgB8JgvgCRYH/2wwMP0ZHHzcLM2so+qyrwZVbOvt+TXv4VmRTtJ DMyFoq60R5po9XRQ5SxPnveVab/wqT+tLRg2DgWqQFM1dHf0agmPVVeWIEaamYN/wHh5 VxQsLylhdZoC+84NhM/GHHgvAWjXpbJAzFqDDhK3r0OCJfoJNELxkrHxiIcbl2jecCpW t4wISW7aKSi9FHl7RR8N+n+A3j50oL7eZOXrYFEXxIoOEHQ681dL//jiHnndUvEo916s uqlw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765372617; x=1765977417; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=6jBtFYWwdIR8B69gtY/Q+wADcN5do127ZO/G3eZnzAQ=; b=l47QelvMdMqsLM2pJJUGKtlTEQ6iqjagzrzpiVZy1IiWE+hmr9w7Ivs+CBIeYj3C3q NszY5gjsFtY7OIbS2m4S8ux2O+o2gqz/vfJkgAJ9S2XhDnPcd3tPQz5+xeLKcX6w+1l2 qgtVfgKi6EiYZENtvvSvp5OdaYv3VikppY8Dki6txeGty1nIsaUPfeQUwI2KiFjkHZJZ dO9hQ5qlw/9JwUxAOlBk40GnfETz82JeesVSvWfH+7x89X3TI//cuB3xvsjRtqRn5xVx 1Tk4yvA7yHroKVAq81BjXslTUInmDWkFPBkYynhY7taXDxshJej3EldRfNI3jJ5oxAR7 575Q== X-Gm-Message-State: AOJu0YzbLF7Sr4CtgEh8XL4z6kITJrDedARGyIC96lDiXsQS93XMOtF3 lfc+gMoox7XmrfQE/re3Cj5fqj0Zs78l/gwQkJ3Rd4LMbK/wZS6/6taVpJ8AlIkupOYGoP7VZe+ MsEKIOKOSasR2cwsTawJMvnVtWvMjV3f7G2yP5MECbv/bQ0EiiIUxW4pT2HioEepuIVDEV7wvlh ODFvITnBR96OjrgYvHlkzJCPfvluzAJWxgxUm/sbfu X-Gm-Gg: AY/fxX7hDB7PZgMweaV3siyZoB22dMxlm/dA77YHsVcGb7eAUqkXp+trliSFZsPgwi1 zl1rEpfFRMGCTOs/QCnZKxr0d5wVmoOIslGVc6aitfdKsLIsTEO6s/c/VuxjsZEWY4uOV1LPBkz 94DAoD8xAvOZPxpjNDNxm1luvcjGSkUfMooUmtJSxK5s3lqlku2iY6ZLQ+WIiD8sTwo4nkx4V9k ARtYJG+ejtg3T/CQmhNzwliAYTKzAmDWTCh8ONQtx5oQwAAwlCQTX43gaJINjpseB/sPPRICmlY FBCaCXOS/MQy1M8yMknm1kDUw6k9LEMCR5s4Ft0ZeU+vKK+H7impRi2NLMUM/ScJFAae/9YHErs j+wJBKzKNx8gynfHwmFdl1q+fGil6ax3/fjb0NzfxISSNwb2KGuCbn3J9Ra+t5orqm+twymr08L eMtJ2MilUGNAJhoHk= X-Received: by 2002:a05:6000:2681:b0:42b:3592:1bbd with SMTP id ffacd0b85a97d-42fa3b01833mr2554515f8f.33.1765372616661; Wed, 10 Dec 2025 05:16:56 -0800 (PST) X-Google-Smtp-Source: AGHT+IHbGGucd7hsJVDgYg8QHJJt4D+DnO+e1hdzwo1iqeAfjMbXjAXPZKkNDNNUwr4QrrHdOFCdiA== X-Received: by 2002:a05:6000:2681:b0:42b:3592:1bbd with SMTP id ffacd0b85a97d-42fa3b01833mr2554483f8f.33.1765372616127; Wed, 10 Dec 2025 05:16:56 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org Subject: [PATCH 01/18] target/i386/tcg: fix check for invalid VSIB instruction Date: Wed, 10 Dec 2025 14:16:36 +0100 Message-ID: <20251210131653.852163-2-pbonzini@redhat.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251210131653.852163-1-pbonzini@redhat.com> References: <20251210131653.852163-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1765372839499158500 Content-Type: text/plain; charset="utf-8" VSIB instructions (VEX class 12) must not have an address prefix. Checking s->aflag =3D=3D MO_16 is not enough because in 64-bit mode the address prefix changes aflag to MO_32. Add a specific check bit instead. Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini --- target/i386/tcg/decode-new.h | 3 +++ target/i386/tcg/decode-new.c.inc | 27 +++++++++++++-------------- 2 files changed, 16 insertions(+), 14 deletions(-) diff --git a/target/i386/tcg/decode-new.h b/target/i386/tcg/decode-new.h index 7f23d373ea7..38882b5c6ab 100644 --- a/target/i386/tcg/decode-new.h +++ b/target/i386/tcg/decode-new.h @@ -181,6 +181,9 @@ typedef enum X86InsnCheck { /* Vendor-specific checks for Intel/AMD differences */ X86_CHECK_i64_amd =3D 2048, X86_CHECK_o64_intel =3D 4096, + + /* No 0x67 prefix allowed */ + X86_CHECK_no_adr =3D 8192, } X86InsnCheck; =20 typedef enum X86InsnSpecial { diff --git a/target/i386/tcg/decode-new.c.inc b/target/i386/tcg/decode-new.= c.inc index 0f8c5d16938..0b85b0f6513 100644 --- a/target/i386/tcg/decode-new.c.inc +++ b/target/i386/tcg/decode-new.c.inc @@ -623,10 +623,10 @@ static const X86OpEntry opcodes_0F38_00toEF[240] =3D { [0x46] =3D X86_OP_ENTRY3(VPSRAV, V,x, H,x, W,x, vex6 chk(= W0) cpuid(AVX2) p_66), [0x47] =3D X86_OP_ENTRY3(VPSLLV, V,x, H,x, W,x, vex6 cpui= d(AVX2) p_66), =20 - [0x90] =3D X86_OP_ENTRY3(VPGATHERD, V,x, H,x, M,d, vex12 cpuid(AVX2= ) p_66), /* vpgatherdd/q */ - [0x91] =3D X86_OP_ENTRY3(VPGATHERQ, V,x, H,x, M,q, vex12 cpuid(AVX2= ) p_66), /* vpgatherqd/q */ - [0x92] =3D X86_OP_ENTRY3(VPGATHERD, V,x, H,x, M,d, vex12 cpuid(AVX2= ) p_66), /* vgatherdps/d */ - [0x93] =3D X86_OP_ENTRY3(VPGATHERQ, V,x, H,x, M,q, vex12 cpuid(AVX2= ) p_66), /* vgatherqps/d */ + [0x90] =3D X86_OP_ENTRY3(VPGATHERD, V,x, H,x, M,d, vex12 chk(no_adr= ) cpuid(AVX2) p_66), /* vpgatherdd/q */ + [0x91] =3D X86_OP_ENTRY3(VPGATHERQ, V,x, H,x, M,q, vex12 chk(no_adr= ) cpuid(AVX2) p_66), /* vpgatherqd/q */ + [0x92] =3D X86_OP_ENTRY3(VPGATHERD, V,x, H,x, M,d, vex12 chk(no_adr= ) cpuid(AVX2) p_66), /* vgatherdps/d */ + [0x93] =3D X86_OP_ENTRY3(VPGATHERQ, V,x, H,x, M,q, vex12 chk(no_adr= ) cpuid(AVX2) p_66), /* vgatherqps/d */ =20 /* Should be exception type 2 but they do not have legacy SSE equivale= nts? */ [0x96] =3D X86_OP_ENTRY3(VFMADDSUB132Px, V,x, H,x, W,x, vex6 cpuid(F= MA) p_66), @@ -2435,8 +2435,8 @@ static bool validate_vex(DisasContext *s, X86DecodedI= nsn *decode) break; case 12: /* Must have a VSIB byte and no address prefix. */ - assert(s->has_modrm); - if ((s->modrm & 7) !=3D 4 || s->aflag =3D=3D MO_16) { + assert(s->has_modrm && (decode->e.check & X86_CHECK_no_adr)); + if ((s->modrm & 7) !=3D 4) { goto illegal; } =20 @@ -2740,15 +2740,14 @@ static void disas_insn(DisasContext *s, CPUState *c= pu) goto illegal_op; } } - if (decode.e.check & X86_CHECK_prot_or_vm86) { - if (!PE(s)) { - goto illegal_op; - } + if ((decode.e.check & X86_CHECK_prot_or_vm86) && !PE(s)) { + goto illegal_op; } - if (decode.e.check & X86_CHECK_no_vm86) { - if (VM86(s)) { - goto illegal_op; - } + if ((decode.e.check & X86_CHECK_no_vm86) && VM86(s)) { + goto illegal_op; + } + if ((decode.e.check & X86_CHECK_no_adr) && (s->prefix & PREFIX_ADR= )) { + goto illegal_op; } } =20 --=20 2.52.0