From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28168 invoked by alias); 10 Jun 2018 15:23:04 -0000 Mailing-List: contact elfutils-devel-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Post: List-Help: List-Subscribe: Sender: elfutils-devel-owner@sourceware.org Received: (qmail 28157 invoked by uid 89); 10 Jun 2018 15:23:03 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Checked: by ClamAV 0.99.4 on sourceware.org X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=ham version=3.3.2 spammy=58pm, consumers, 58PM, Hx-languages-length:508 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=ham version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on sourceware.org X-Spam-Level: X-HELO: gnu.wildebeest.org Received: from wildebeest.demon.nl (HELO gnu.wildebeest.org) (212.238.236.112) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Sun, 10 Jun 2018 15:23:02 +0000 Received: from librem.wildebeest.org (deer0x15.wildebeest.org [172.31.17.151]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by gnu.wildebeest.org (Postfix) with ESMTPSA id 82E513014705 for ; Sun, 10 Jun 2018 17:23:00 +0200 (CEST) Received: by librem.wildebeest.org (Postfix, from userid 1000) id 6A027141A87; Sun, 10 Jun 2018 17:23:00 +0200 (CEST) Date: Sun, 10 Jun 2018 15:23:00 -0000 From: Mark Wielaard To: elfutils-devel@sourceware.org Subject: Re: [PATCH] libdw: Detect bad DWARF in store_implicit_value. Message-ID: <20180610152300.GC7539@wildebeest.org> References: <1528467538-8005-1-git-send-email-mark@klomp.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1528467538-8005-1-git-send-email-mark@klomp.org> User-Agent: Mutt/1.9.5 (2018-04-13) X-Spam-Flag: NO X-IsSubscribed: yes X-SW-Source: 2018-q2/txt/msg00198.txt.bz2 On Fri, Jun 08, 2018 at 04:18:58PM +0200, Mark Wielaard wrote: > The afl fuzzer running against the varlocs test detected we didn't report > the value block of a DW_OP_implicit_value consistently when the DWARF was > bad. Although this doesn't cause a crash it might result in consumers > using dwarf_getlocation_implicit_value seeing an inconsistent block length > value. To fix this detect and report bad DWARF data earlier. Pushed to master.