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Mon, 29 Jan 2024 22:36:59 +0000 (UTC) From: Jonathan Corbet To: jeffxu@chromium.org, akpm@linux-foundation.org, keescook@chromium.org, jannh@google.com, sroettger@google.com, willy@infradead.org, gregkh@linuxfoundation.org, torvalds@linux-foundation.org, usama.anjum@collabora.com, rdunlap@infradead.org Cc: jeffxu@google.com, jorgelo@chromium.org, groeck@chromium.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, pedro.falcato@gmail.com, dave.hansen@intel.com, linux-hardening@vger.kernel.org, deraadt@openbsd.org, Jeff Xu Subject: Re: [PATCH v7 0/4] Introduce mseal() In-Reply-To: <20240122152905.2220849-1-jeffxu@chromium.org> References: <20240122152905.2220849-1-jeffxu@chromium.org> Date: Mon, 29 Jan 2024 15:36:58 -0700 Message-ID: <87a5ong41h.fsf@meer.lwn.net> MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Queue-Id: 81B24140017 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: p9nq9o4zunewgw3fkt8zsfyzicm3ecno X-HE-Tag: 1706567821-761001 X-HE-Meta: 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 LOnIa2rO 0Qg7qDmt6pEWeF7mbSvkDpFGpTqLQeKiXny1JU2+/2Ji/qunCOmQ8dlMpIG5kRlkaIXhIdj69JqlTq7eovJw8ZEMm0TAj9ZNA8Xap78Aj3km2TCTUzpdOyJ/UwATLQBoqaF5Tmq6iZbLHIZbAMsyx5pe/6bF0KUwfG5RIZUbi8XAolMXAHVUKwPVMEsXv7o8lJoRjObzYnOWcxUGEmk9OFyctcxL49Tlgha5bg3E0pb8OfcB/T0bMCOlJqPpa3HHUbnGXgV2g6kfTYvDMpu1GTqkyUg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: jeffxu@chromium.org writes: > Although the initial version of this patch series is targeting the > Chrome browser as its first user, it became evident during upstream > discussions that we would also want to ensure that the patch set > eventually is a complete solution for memory sealing and compatible > with other use cases. The specific scenario currently in mind is > glibc's use case of loading and sealing ELF executables. To this end, > Stephen is working on a change to glibc to add sealing support to the > dynamic linker, which will seal all non-writable segments at startup. > Once this work is completed, all applications will be able to > automatically benefit from these new protections. Is this work posted somewhere? Having a second - and more generally useful - user for this API would do a lot to show that the design is, in fact, right and useful beyond the Chrome browser. Thanks, jon