From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by sourceware.org (Postfix) with ESMTPS id BB2753858C20 for ; Wed, 16 Feb 2022 17:01:21 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org BB2753858C20 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 7AF0FB81F70; Wed, 16 Feb 2022 17:01:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8C348C340ED; Wed, 16 Feb 2022 17:01:17 +0000 (UTC) Date: Wed, 16 Feb 2022 17:01:14 +0000 From: Mark Brown To: Szabolcs Nagy Cc: Catalin Marinas , Will Deacon , linux-arch@vger.kernel.org, Yu-cheng Yu , libc-alpha@sourceware.org, Jeremy Linton , linux-arm-kernel@lists.infradead.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> <20220216164954.GH2692478@arm.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="IDIQYRRmJXIEAoCv" Content-Disposition: inline In-Reply-To: <20220216164954.GH2692478@arm.com> X-Cookie: Fremen add life to spice! X-Spam-Status: No, score=-5.5 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: Wed, 16 Feb 2022 17:01:23 -0000 --IDIQYRRmJXIEAoCv Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Feb 16, 2022 at 04:49:54PM +0000, Szabolcs Nagy wrote: > if we ever wanted to map bti marked binaries without PROT_BTI > and introduced a knob to do that in ld.so, then this change > would be problematic (we cannot easily remove PROT_BTI from > the exe), but we don't have such plans. In general or only in the case where MWDE is enabled (in which case it's the same problem as exists today trying to enable BTI in the presence of MWDE)? --IDIQYRRmJXIEAoCv Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmINLdkACgkQJNaLcl1U h9B3Vgf9Gf4hM0r0r3E8yAJ65goIc2UaT7kWPfaSGqjaIG3+qS8yv9KVfXzhEkgx vzPb8pmp35UYVRmzy+YwOncM19icLq9YGv4955W2q+e+gmALZkzQ5qfNGVVlmJ5C SU1pLwRnsNmmCTqiET4vKhjwiRxiHAExirnJWJWk5+sFjF28hdXBOxeQDjyGwVC4 buo3gcZKIkEl/uu+JsMtak/hFyVy8/roRjfEeTlLKN8RqFftSZdjV7jF8EwD4gGc Wk2YMbMAnYjFXm15gmMYp4cgLbWdvLprGuSRK/2/pXg3NawF3ja7NIpJimr8ZS2u KlgT0n1ed0+dj3Kyq7hlifTVqZ8vfw== =+V3F -----END PGP SIGNATURE----- --IDIQYRRmJXIEAoCv--