From owner-svn-src-head@freebsd.org Sat Mar 14 15:15:28 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2A62225BF15; Sat, 14 Mar 2020 15:15:28 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 48fmMz4KzNz4Zyg; Sat, 14 Mar 2020 15:15:27 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 7738020C8E; Sat, 14 Mar 2020 15:15:27 +0000 (UTC) (envelope-from kevans@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 02EFFRXq031468; Sat, 14 Mar 2020 15:15:27 GMT (envelope-from kevans@FreeBSD.org) Received: (from kevans@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 02EFFRIe031467; Sat, 14 Mar 2020 15:15:27 GMT (envelope-from kevans@FreeBSD.org) Message-Id: <202003141515.02EFFRIe031467@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kevans set sender to kevans@FreeBSD.org using -f From: Kyle Evans Date: Sat, 14 Mar 2020 15:15:27 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r358993 - head/lib/libssp X-SVN-Group: head X-SVN-Commit-Author: kevans X-SVN-Commit-Paths: head/lib/libssp X-SVN-Commit-Revision: 358993 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 14 Mar 2020 15:15:28 -0000 Author: kevans Date: Sat Mar 14 15:15:27 2020 New Revision: 358993 URL: https://svnweb.freebsd.org/changeset/base/358993 Log: libssp: don't compile with -fstack-protector* This similarly matches what we do in libc; compiling libssp with -fstack-protector* is actively harmful. For instance, if the canary ctor ends up with a stack protector then it will trivially trigger a false positive as the canary's being initialized. This was noted by the reporter as irc/ircd-hybrid started crashing at start after our libssp was MFC'd to stable/11, as its build will explicitly link in libssp. On FreeBSD, this isn't necessary as SSP bits are included in libc, but it should absolutely not trigger runtime breakage -- it does mean that the canary will get initialized twice, but as this is happening early on in application startup it should just be redundant work. Reported by: Tod McQuillin MFC after: 3 days Modified: head/lib/libssp/Makefile Modified: head/lib/libssp/Makefile ============================================================================== --- head/lib/libssp/Makefile Sat Mar 14 14:04:55 2020 (r358992) +++ head/lib/libssp/Makefile Sat Mar 14 15:15:27 2020 (r358993) @@ -17,4 +17,8 @@ SRCS= stack_protector.c fortify_stubs.c CFLAGS.fortify_stubs.c= -Wno-unused-parameter +# Stack protection on libssp symbols should be considered harmful, as we may +# be talking about, for example, the guard setup constructor. +SSP_CFLAGS:= + .include