From owner-freebsd-stable@freebsd.org Thu Apr 26 10:06:26 2018 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2DBA8FA8F2D for ; Thu, 26 Apr 2018 10:06:26 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from tensor.andric.com (tensor.andric.com [87.251.56.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "tensor.andric.com", Issuer "COMODO RSA Domain Validation Secure Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B5F8A7C5EA for ; Thu, 26 Apr 2018 10:06:25 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from coleburn.home.andric.com (coleburn.home.andric.com [192.168.0.15]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tensor.andric.com (Postfix) with ESMTPSA id 8990031852; Thu, 26 Apr 2018 12:06:24 +0200 (CEST) From: Dimitry Andric Message-Id: <3A857D03-607A-4983-A4C2-D3A93119297A@FreeBSD.org> Content-Type: multipart/signed; boundary="Apple-Mail=_FBD8AFD1-4377-4F69-9417-97F5F1704BD9"; protocol="application/pgp-signature"; micalg=pgp-sha1 Mime-Version: 1.0 (Mac OS X Mail 11.3 \(3445.6.18\)) Subject: Re: gptboot broken when compiled with clang 6 and WITHOUT_LOADER_GELI -- clang 5 is OK Date: Thu, 26 Apr 2018 12:06:21 +0200 In-Reply-To: Cc: Andre Albsmeier , FreeBSD Stable To: Dewayne Geraghty References: <20180425165840.GA1330@bali> X-Mailer: Apple Mail (2.3445.6.18) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Apr 2018 10:06:26 -0000 --Apple-Mail=_FBD8AFD1-4377-4F69-9417-97F5F1704BD9 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii On 26 Apr 2018, at 06:17, Dewayne Geraghty = wrote: >=20 > Andre, You're not alone. I think there's a problem with clang6 on = i386 > FreeBSD 11.1X, refer: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D227552 > https://forums.freebsd.org/threads/uptime-w-i386-breakage.65584/ > and perhaps also on amd64, search for > = https://bugs.freebsd.org/bugzilla/buglist.cgi?quicksearch=3Dclang&list_id=3D= 226390. >=20 > Without time to investigate I've reverted userland > FreeBSD 11.2-PRERELEASE r332843M amd64 1101515 1101509 > FreeBSD 11.2-PRERELEASE r332843M i386 1101515 1101509 As noted in another post, I cannot reproduce the problems with gptboot, but with FreeBSD-11.2-PRERELEASE-i386-20180420-r332802, I do indeed see w and uptime crashing in libxo: (gdb) bt #0 ifree (tsd=3D0x28000000) at arena.h:799 #1 0x2814b506 in __free (ptr=3D0x280601ef) at tsd.h:716 #2 0x2808bb07 in xo_do_emit_fields () at = /usr/src/contrib/libxo/libxo/libxo.c:6419 #3 0x28089a1c in xo_do_emit (xop=3D, flags=3D, fmt=3D0x804ad4d "{:time-of-day/%s} ") at = /usr/src/contrib/libxo/libxo/libxo.c:6470 #4 0x28089b61 in xo_emit (fmt=3D0x804ad4d "{:time-of-day/%s} ") at = /usr/src/contrib/libxo/libxo/libxo.c:6541 #5 0x08049f50 in main (argc=3D, argv=3D) at /usr/src/usr.bin/w/w.c:475 #6 0x080494cd in _start1 () #7 0x08049448 in _start () #8 0x00000000 in ?? () Not sure if this has anything to do with clang though, it looks more like a double free to me, at first glance. I'll do some debugging. -Dimitry --Apple-Mail=_FBD8AFD1-4377-4F69-9417-97F5F1704BD9 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.2 iF0EARECAB0WIQR6tGLSzjX8bUI5T82wXqMKLiCWowUCWuGknQAKCRCwXqMKLiCW o/EBAKDxBJJ7xA0p4eoQRt/xd+cTcIBTzwCeOkHqM3pfTLLR6F9LVvBPxl2L7jc= =dpf3 -----END PGP SIGNATURE----- --Apple-Mail=_FBD8AFD1-4377-4F69-9417-97F5F1704BD9--