linux-kernel - Re: NFS/AFS/Selinux issues with 2.26.29

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Date:	Wed, 25 Mar 2009 19:24:49 -0400
From:	Marc Dionne <marc.c.dionne@...il.com>
To:	Richard A Nelson <cowboy@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org,
	openafs-devel@...nafs.org
Subject: Re: NFS/AFS/Selinux issues with 2.26.29

On 03/25/2009 06:09 PM, Richard A Nelson wrote:
> -- AFS --
> Mar 24 14:33:54 bandit-hall kernel: BUG: unable to handle kernel NULL pointer dereference at 00000010
> Mar 24 14:33:54 bandit-hall kernel: IP: [<c021ba99>] selinux_key_alloc+0x26/0x3b
> Mar 24 14:33:54 bandit-hall kernel: *pde = 00000000
> Mar 24 14:33:54 bandit-hall kernel: Oops: 0000 [#1] PREEMPT SMP
> Mar 24 14:33:54 bandit-hall kernel: last sysfs file: /sys/class/power_supply/BAT0/energy_full
> Mar 24 14:33:54 bandit-hall kernel: Modules linked in: radeon drm binfmt_misc ppdev lp openafs(P) bnep rfcomm l2cap ipt_ULOG nsc_irc
> Mar 24 14:33:54 bandit-hall kernel: snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi irtty_sir snd_seq_midi_event ipw2100 thinkpad
> Mar 24 14:33:54 bandit-hall kernel:
> Mar 24 14:33:54 bandit-hall kernel: Pid: 20144, comm: ckpasswd Tainted: P           (2.6.29 #2) 2373MU3
> Mar 24 14:33:54 bandit-hall kernel: EIP: 0060:[<c021ba99>] EFLAGS: 00010286 CPU: 0
> Mar 24 14:33:54 bandit-hall kernel: EIP is at selinux_key_alloc+0x26/0x3b
> Mar 24 14:33:54 bandit-hall kernel: EAX: fffffff4 EBX: ce673170 ECX: dd6232a0 EDX: 00000000
> Mar 24 14:33:54 bandit-hall kernel: ESI: f66fb9c0 EDI: f66fba14 EBP: dd645d94 ESP: dd645d8c
> Mar 24 14:33:54 bandit-hall kernel: DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
> Mar 24 14:33:54 bandit-hall kernel: Process ckpasswd (pid: 20144, ti=dd644000 task=ce673170 task.ti=dd644000)
> Mar 24 14:33:54 bandit-hall kernel: Stack:
> Mar 24 14:33:54 bandit-hall kernel: c0495f78 d5cf63c0 dd645da0 c0217eff f66fb9c0 dd645dd4 c02130e6 00000009
> Mar 24 14:33:54 bandit-hall kernel: dd645df4 c0495898 0000000a 00000000 0000000b 0000001b 00004e20 ce673170
> Mar 24 14:33:54 bandit-hall kernel: 00000009 00000009 dd645e14 f887a658 00000009 ce673170 1f3f0000 00000000
> Mar 24 14:33:54 bandit-hall kernel: Call Trace:
> Mar 24 14:33:54 bandit-hall kernel: [<c0217eff>] ? security_key_alloc+0x10/0x13
> Mar 24 14:33:54 bandit-hall kernel: [<c02130e6>] ? key_alloc+0x185/0x2e6
> Mar 24 14:33:54 bandit-hall kernel: [<f887a658>] ? setpag+0xa1/0x17d [openafs]

The arguments to key_alloc() changed with 2.6.29, but this was fixed 
only recently in the OpenAFS source - it wasn't fixed in the original 
patches for 2.6.29.  I would guess that's the cause of the oops.

You might want to try current OpenAFS source or a 1.4.9 pre-release.

Marc
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