From patchwork Mon Dec 3 10:04:14 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Bolshakov X-Patchwork-Id: 1006764 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=yadro.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=yadro.com header.i=@yadro.com header.b="u98JpKKD"; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 437ghK5tC5z9s47 for ; Mon, 3 Dec 2018 21:09:21 +1100 (AEDT) Received: from localhost ([::1]:47709 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTlAF-0005md-8m for incoming@patchwork.ozlabs.org; Mon, 03 Dec 2018 05:09:19 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36554) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTl73-0003dv-Os for qemu-devel@nongnu.org; Mon, 03 Dec 2018 05:06:07 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gTl6x-0004Ci-Fx for qemu-devel@nongnu.org; Mon, 03 Dec 2018 05:06:01 -0500 Received: from mta-01.yadro.com ([89.207.88.251]:37864) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gTl6x-0004Bi-87; Mon, 03 Dec 2018 05:05:55 -0500 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 58FA04194F; Mon, 3 Dec 2018 10:05:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:mime-version:x-mailer:message-id:date :date:subject:subject:from:from:received:received:received; s= mta-01; t=1543831552; x=1545645953; bh=ZvvJ4BQXqXmafltvUVBAGwAQY KmPeaIvMXBoo8ll3ZU=; b=u98JpKKDqYvus0pm1QiU11BR5+ooFVbD7BEhkdNWU vdsB87zrqVuyNBc+7gGBYLmbvCG5exWP+10GNwk94GZ7mpvzyuxEwNOPUPuUjBmM 10w7pb/AhoGcYwmHg6+mDQoSboHF3YstsC3MRs9mKUQ8uVF7Vp/7MwY8UFMFd+Hz ms= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 538s4iMJt3SU; Mon, 3 Dec 2018 13:05:52 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 049214194D; Mon, 3 Dec 2018 13:05:51 +0300 (MSK) Received: from localhost (172.17.128.60) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 3 Dec 2018 13:05:50 +0300 From: Roman Bolshakov To: Date: Mon, 3 Dec 2018 13:04:14 +0300 Message-ID: <20181203100415.53027-1-r.bolshakov@yadro.com> X-Mailer: git-send-email 2.17.2 (Apple Git-113) MIME-Version: 1.0 X-Originating-IP: [172.17.128.60] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 89.207.88.251 Subject: [Qemu-devel] [PATCH for-3.1 1/2] i386: hvf: Fix overrun of _decode_tbl1 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: qemu-trivial@nongnu.org, Paolo Bonzini , Roman Bolshakov , Eduardo Habkost , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Single opcode instructions in ff group were incorrectly processed because an overrun of _decode_tbl1[0xff] resulted in access of _decode_tbl2[0x0]. Thus, decode_sldtgroup was called instead of decode_ffgroup: 7d71: decode_sldtgroup: 1 Unimplemented handler (7d71) for 108 (ff 0) While at it correct maximum length for _decode_tbl2 and _decode_tbl3. Signed-off-by: Roman Bolshakov --- target/i386/hvf/x86_decode.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/target/i386/hvf/x86_decode.c b/target/i386/hvf/x86_decode.c index 2e33b69541..d125a6ef83 100644 --- a/target/i386/hvf/x86_decode.c +++ b/target/i386/hvf/x86_decode.c @@ -454,9 +454,9 @@ struct decode_x87_tbl { struct decode_tbl invl_inst = {0x0, 0, 0, false, NULL, NULL, NULL, NULL, decode_invalid}; -struct decode_tbl _decode_tbl1[255]; -struct decode_tbl _decode_tbl2[255]; -struct decode_x87_tbl _decode_tbl3[255]; +struct decode_tbl _decode_tbl1[256]; +struct decode_tbl _decode_tbl2[256]; +struct decode_x87_tbl _decode_tbl3[256]; static void decode_x87_ins(CPUX86State *env, struct x86_decode *decode) {