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Tue, 5 Jan 2021 15:22:12 -0500 (EST) Date: Tue, 5 Jan 2021 15:22:10 -0500 From: Leo Famulari Message-ID: References: <8735zf30yw.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <8735zf30yw.fsf@gmail.com> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-guix@gnu.org List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: 45676@debbugs.gnu.org Errors-To: bug-guix-bounces+larch=yhetil.org@gnu.org Sender: "bug-Guix" X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -1.34 Authentication-Results: aspmx1.migadu.com; dkim=fail (headers rsa verify failed) header.d=famulari.name header.s=mesmtp header.b=O89nLZ1R; dkim=fail (headers rsa verify failed) header.d=messagingengine.com header.s=fm1 header.b=GzbWMVkQ; dmarc=none; spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Migadu-Queue-Id: 5EB7D9402A0 X-Spam-Score: -1.34 X-Migadu-Scanner: scn0.migadu.com X-TUID: 1u44octsfaMz On Tue, Jan 05, 2021 at 03:36:07PM +0100, Miguel Ángel Arruga Vivas wrote: > There are several binary formats that allow compression of the > executable image, or some of its data, which is decompress at runtime: > > - Kernel images. > - Compressed libraries: e.g. Smalltalk modules. > - Compressed executable or data files: e.g. library.el.gz. > > These aren't taken into account by the grafting process, which may lead > to issues when store paths are located inside that kind of files. It's a serious problem, and not just because of grafting. These obscured references can cause things to be garbage collected inappropriately. Here is an older case of the same problem: https://bugs.gnu.org/24703 It was resolved by patching GCC.