linux-kernel - Re: security: oops on boot in __key_link

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Message-ID: <23131.1406545804@warthog.procyon.org.uk>
Date:	Mon, 28 Jul 2014 12:10:04 +0100
From:	David Howells <dhowells@...hat.com>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	dhowells@...hat.com, James Morris <james.l.morris@...cle.com>,
	serge@...lyn.com, keyrings@...ux-nfs.org,
	linux-security-module@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: security: oops on boot in __key_link_begin

Sasha Levin <sasha.levin@...cle.com> wrote:

> I'm (sometimes) seeing the following when booting the most recent -next
> kernel:

Can you try with my keys-next branch?

	http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=keys-next

That should cut out any interference from other -next stuff.

> [   31.330473] RIP: assoc_array_insert (lib/assoc_array.c:480 lib/assoc_array.c:1021)
> ...
> [   31.330473] ? get_parent_ip (kernel/sched/core.c:2561)
> [   31.330473] ? preempt_count_sub (kernel/sched/core.c:2617)
> [   31.330473] ? put_lock_stats.isra.13 (./arch/x86/include/asm/preempt.h:98 kernel/locking/lockdep.c:254)
> [   31.330473] ? __key_link_begin (./arch/x86/include/asm/bitops.h:311 security/keys/keyring.c:1073)
> [   31.330473] ? __key_link_begin (./arch/x86/include/asm/bitops.h:311 security/keys/keyring.c:1073)
> [   31.330473] __key_link_begin (security/keys/keyring.c:1088)
> [   31.330473] key_create_or_update (security/keys/key.c:840 (discriminator 4))
> [   31.330473] load_system_certificate_list (kernel/system_keyring.c:88)

Given where this is happening, I'm surprised that it doesn't break every
time.  I wonder if it might be some uninitialised memory somewhere:-/

David
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