linux-kernel - Re: [PATCH 2/3 v3] x86: entry_64.S: always allocate complete "struct pt

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Message-ID: <20150225233414.GA3299@kria>
Date:	Thu, 26 Feb 2015 00:34:14 +0100
From:	Sabrina Dubroca <sd@...asysnail.net>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Denys Vlasenko <dvlasenk@...hat.com>,
	Andrey Wagin <avagin@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	X86 ML <x86@...nel.org>, Alexei Starovoitov <ast@...mgrid.com>,
	Will Drewry <wad@...omium.org>,
	Kees Cook <keescook@...omium.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3 v3] x86: entry_64.S: always allocate complete "struct
 pt_regs"

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 tomorrow.

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).

-- 
Sabrina
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