From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752975AbbBZGZ7 (ORCPT ); Thu, 26 Feb 2015 01:25:59 -0500 Received: from ozlabs.org ([103.22.144.67]:43459 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751403AbbBZGZ6 (ORCPT ); Thu, 26 Feb 2015 01:25:58 -0500 Date: Thu, 26 Feb 2015 17:25:47 +1100 From: Stephen Rothwell To: Andrew Morton Cc: Denys Vlasenko , Sabrina Dubroca , Andy Lutomirski , Denys Vlasenko , Andrey Wagin , Ingo Molnar , Linus Torvalds , Oleg Nesterov , Borislav Petkov , "H. Peter Anvin" , Frederic Weisbecker , X86 ML , Alexei Starovoitov , Will Drewry , Kees Cook , LKML Subject: Re: [PATCH 2/3 v3] x86: entry_64.S: always allocate complete "struct pt_regs" Message-ID: <20150226172547.565a6729@canb.auug.org.au> In-Reply-To: <20150225211852.428143fb78e921fd6e4d4e9e@linux-foundation.org> References: <1423778052-21038-1-git-send-email-dvlasenk@redhat.com> <1423778052-21038-2-git-send-email-dvlasenk@redhat.com> <54EE1799.2000602@redhat.com> <54EE3E94.7060208@redhat.com> <20150225224055.GA3678@kria> <20150225233414.GA3299@kria> <20150225211852.428143fb78e921fd6e4d4e9e@linux-foundation.org> X-Mailer: Claws Mail 3.11.1 (GTK+ 2.24.25; i586-pc-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; boundary="Sig_/CXZBI06oxPgK3QMK6m0mtUb"; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --Sig_/CXZBI06oxPgK3QMK6m0mtUb Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi all, On Wed, 25 Feb 2015 21:18:52 -0800 Andrew Morton wrote: > > On Thu, 26 Feb 2015 02:12:57 +0100 Denys Vlasenko wrote: >=20 > > On Thu, Feb 26, 2015 at 12:34 AM, Sabrina Dubroca = wrote: > > > 2015-02-25, 23:40:55 +0100, Sabrina Dubroca wrote: > > >> I can run some userspace programs, but I have no idea what would be > > >> helpful. > > >> I can also try booting a real machine with archlinux/systemd tomorro= w. > > > > > > I got a good boot out of kernels that normally fail. I booted > > > systemd's emergency shell and enabled a few services, in the same > > > order they normally start. journald started cleanly, but after that, > > > every single command produced a "traps:" output and an "audit:" line. > > > > > > I disabled systemd-journald (chmod -x, because `systemctl disable` > > > didn't really disable it), and now it boots, no "traps:" in the log. > > > If I run it, everything fails again (zsh has traps for simply pressing > > > enter on an empty cmd). > >=20 > > That's some progress! > >=20 > > It's strange how one process manages to affect everything else. > >=20 > > "If I run it, everything fails again". How do you run it? Directly, > > or via systemd services mechanism? > > If you just run it directly, can you try running it under > > "strace -f -tt -oLOG"? Does it have the same effect? What's in the LOG? >=20 > I'm hitting this bug as well, bisected to this commit. On an old > x64_64 box, no vms, paravirt, etc. Running FC6 userspace (heh). >=20 > Quite late in initscripts, binaries start getting segmentation faults > and init gives up. Seems to only affect /usr/bin/rhgb-client. There's > one instance where /bin/rm is said to segfault, but I suspect that's > init lying to me. I note that that commit has been removed from today's version of the luto-misc tree and thus linux-next. --=20 Cheers, Stephen Rothwell sfr@canb.auug.org.au --Sig_/CXZBI06oxPgK3QMK6m0mtUb Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJU7rxzAAoJEMDTa8Ir7ZwVHQgP/AmwvkJnYs9UtNGBvgx9CbYA 9DVIM64XnI+mzf4OdtO+wL3IugudYZAd9z9bYOtJnsuFan0tc7UaI+L5qNvr9c9S tgAdHlwxQqX2CDGhFip26PhKKMZ216MDrVEo0Jvlxt3GJtcH4QiVSd0ud79I+2H/ vl7azJbI1ldGKb+0GXhF2AwPZlPdyN5mKpDNmWtrpiStoBwwMEY0K1RIuSKF8hZw JdGDKziH9pZfrRHJon5pN7dnLr6FC3Dd+HvYOl21nOsM41KsRzaMVeluU2nbE5AI uAR3swRRNUnIiAW+bB3uIUZEMh+TXL1QQyNQH9U/wNcENIVpdmr6cQ6UR9zdbGsq M8yrQgfGv02nZJ3j5qiMhmM4Un75FVVflHQa7Q9/5jymiGUH2TiWk3Dd7hxfd8VR 2wY3sMn984UBNDqK3Ng8lLYeURaEtdH98DRkar47CoZL6MXNM/st9Jqheg8EDO4S xvw8ixx/JRY6ttuJfYv6HMKL8ZjoVPa3GVHq24ecwramaJQLXHkbR2OBePHSAMhS 1zw+RSBZ8gqAi+oY0GlCT+o4y7iHw7vqVTzWySMuSH4ZsMmAygZvkZEcLKQi5DCr WkfjojS+IvbYgZzuSA9Ejp3qvXhEyDsowun2KHmH4qOEsCVzF3ufr3QbD4kgqXRD O4kvUJsRlU5fd5I3IFdb =Rqrf -----END PGP SIGNATURE----- --Sig_/CXZBI06oxPgK3QMK6m0mtUb--