From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by sourceware.org (Postfix) with ESMTPS id AC5FD385802B for ; Fri, 25 Feb 2022 15:11:51 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org AC5FD385802B Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 8D6F5B83204; Fri, 25 Feb 2022 15:11:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45960C340E7; Fri, 25 Feb 2022 15:11:47 +0000 (UTC) Date: Fri, 25 Feb 2022 15:11:43 +0000 From: Mark Brown To: Will Deacon Cc: Catalin Marinas , Szabolcs Nagy , Jeremy Linton , "H . J . Lu" , Yu-cheng Yu , linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, libc-alpha@sourceware.org Subject: Re: [PATCH v8 0/4] arm64: Enable BTI for the executable as well as the interpreter Message-ID: References: <20220124150704.2559523-1-broonie@kernel.org> <20220215183456.GB9026@willie-the-truck> <20220225135350.GA19698@willie-the-truck> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="6hJfgwb1yMHoRrnk" Content-Disposition: inline In-Reply-To: <20220225135350.GA19698@willie-the-truck> X-Cookie: I smell a wumpus. X-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Feb 2022 15:11:53 -0000 --6hJfgwb1yMHoRrnk Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Feb 25, 2022 at 01:53:51PM +0000, Will Deacon wrote: > I still think this new behaviour should be opt-in, so adding a sysctl for > that would be my preference if we proceed with this approach. I'm happy to have a sysctl but I'd rather it be opt out rather than opt in since it seems better to default to enabling the security feature when there is a strong expectation that it would seem better to enable it by default sine it's not expected to be disruptive and the sysctl is more of a "what if there's a problem" thing. --6hJfgwb1yMHoRrnk Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmIY8a8ACgkQJNaLcl1U h9Bpagf/Qa3XQwrrpcD8o5hL6Hcly0nN3c1oddDQMVn8t95ZxqdVD58AFN2xKULJ dUJyThV6a83oQT3bzLZB3lCFXKwaIDXPB/i/Q5+i0v7zMryNllxQeBuALWG6Fxru qPTh4s3kEzMVQZiJmQJqxFw1hw1KIKZtCYIQCdHXe/8nxbYqlWo1CCu7MH88zpMu lu4DQGel9GA2kMfKKvFc2sV371HfYohcTxuqjZkXIJu6v/3+C8sp/yHArIfRK/aY 4n2AmN8NDTVgFYW+Joy1KzHXUN7AmCyf53bQEu1LlC3NjyXYbnh4vjLG/MDB3gtl r2wx9Y5Sj2FQwFc7Jywjrf2sF21Bbg== =ve8P -----END PGP SIGNATURE----- --6hJfgwb1yMHoRrnk--