From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C00C1C433DB for ; Fri, 5 Mar 2021 13:41:55 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2B17964F56 for ; Fri, 5 Mar 2021 13:41:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2B17964F56 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:57408 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lIAiI-0001uw-1N for qemu-devel@archiver.kernel.org; Fri, 05 Mar 2021 08:41:54 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:59252) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lIAhe-0001SS-I8 for qemu-devel@nongnu.org; Fri, 05 Mar 2021 08:41:14 -0500 Received: from indium.canonical.com ([91.189.90.7]:34284) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lIAhc-0008Nc-GI for qemu-devel@nongnu.org; Fri, 05 Mar 2021 08:41:14 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1lIAha-0007fL-6o for ; Fri, 05 Mar 2021 13:41:10 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id ECBC42E815F for ; Fri, 5 Mar 2021 13:41:09 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Fri, 05 Mar 2021 13:33:13 -0000 From: =?utf-8?q?Alex_Benn=C3=A9e?= <1915925@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Confirmed; importance=Undecided; assignee=alex.bennee@linaro.org; X-Launchpad-Bug-Tags: semihosting testcase X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: inver7 pmaydell X-Launchpad-Bug-Reporter: iNvEr7 (inver7) X-Launchpad-Bug-Modifier: =?utf-8?q?Alex_Benn=C3=A9e_=28ajbennee=29?= References: <161356438332.24036.4652954745285513495.malonedeb@chaenomeles.canonical.com> Message-Id: <161495119446.16770.15459043241781988005.launchpad@chaenomeles.canonical.com> Subject: [Bug 1915925] Re: ARM semihosting HEAPINFO results wrote to wrong address X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="fc09074b06b3b9178bd28175bdab646b3b5abfce"; Instance="production" X-Launchpad-Hash: a3014be46e2975cf6ba9a2fcc4ef947aa3685f8f Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1915925 <1915925@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" ** Changed in: qemu Assignee: (unassigned) =3D> Alex Benn=C3=A9e (ajbennee) -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1915925 Title: ARM semihosting HEAPINFO results wrote to wrong address Status in QEMU: Confirmed Bug description: This affects latest development branch of QEMU. According to the ARM spec of the HEAPINFO semihosting call: https://developer.arm.com/documentation/100863/0300/Semihosting- operations/SYS-HEAPINFO--0x16-?lang=3Den > the PARAMETER REGISTER contains the address of a pointer to a four- field data block. However, QEMU treated the PARAMETER REGISTER as pointing to a four- field data block directly. Here is a simple program that can demonstrate this problem: https://github.com/iNvEr7/qemu-learn/tree/newlib-bug/semihosting- newlib This code links with newlib with semihosting mode, which will call the HEAPINFO SVC during crt0 routine. When running in QEMU (make run), it may crash the program either because of invalid write or memory curruption, depending on the compiled program structure. Also refer to my discussion with newlib folks: https://sourceware.org/pipermail/newlib/2021/018260.html To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1915925/+subscriptions