linux-kernel - linux-next: OOPS at boot time

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Message-Id: <20100720164145.e06242b3.sfr@canb.auug.org.au>
Date:	Tue, 20 Jul 2010 16:41:45 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: linux-next: OOPS at boot time

Hi Al,

All of my PowerPC boot tests are getting this after getting to user mode
(sometimes several times):

------------[ cut here ]------------
kernel BUG at fs/inode.c:1244!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=128 NUMA pSeries
last sysfs file: /sys/kernel/uevent_seqnum
Modules linked in: ehea xt_tcpudp iptable_filter ip_tables nfnetlink nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT x_tables dm_mirror dm_region_hash dm_log dm_zero dm_snapshot parport_pc parport dm_multipath autofs4
NIP: c000000000168074 LR: c000000000168064 CTR: 0000000000000000
REGS: c0000000063d39f0 TRAP: 0700   Not tainted  (2.6.35-rc5-autokern1)
MSR: 8000000000029032 <EE,ME,CE,IR,DR>  CR: 22008422  XER: 20000001
TASK = c000000003a25840[4995] 'rm' THREAD: c0000000063d0000 CPU: 2
GPR00: 0000000000000001 c0000000063d3c70 c000000000bfdea0 c0000000015f2090 
GPR04: 0000000000000003 0000000000000001 c0000000063d3bd0 c000000000c5a388 
GPR08: 80c0000000000000 0000000000000006 6000000000000000 8000000000000000 
GPR12: c0000000056c0598 c0000000074d6400 0000000003100000 0000000000779b68 
GPR16: 00000000007782f0 0000000010018875 00000000ff9c74b8 0000000000000000 
GPR20: 0000000000000000 0000000000000000 0000000010010000 0000000010010000 
GPR24: 0000000000000001 00000000fffba994 0000000000000002 000000001001a038 
GPR28: c000000006617800 c000000000aefd40 c000000000b586b8 c0000000056c0748 
NIP [c000000000168074] .iput+0x288/0x2d0
LR [c000000000168064] .iput+0x278/0x2d0
Call Trace:
[c0000000063d3c70] [c000000000168064] .iput+0x278/0x2d0 (unreliable)
[c0000000063d3d00] [c00000000015e964] .do_unlinkat+0x124/0x1b8
[c0000000063d3e30] [c000000000008554] syscall_exit+0x0/0x40
Instruction dump:
38000000 f81f0008 f81f0000 e87e8090 48457d8d 60000000 7fe3fb78 4bfff339 
e81f03b0 68000060 3120ffff 7c090110 <0b000000> 38210090 7fe3fb78 e8010010 
---[ end trace 9ace9d3884bc0aac ]---
Trace/breakpoint trap
------------[ cut here ]------------

This is:
	BUG_ON(inode->i_state != (I_FREEING | I_CLEAR));
in iput_final().

That BUG_ON was added by commit c0ae81f2 ("Make ->drop_inode() just
return whether inode needs to be dropped").

Has anyone seen this or something similar?
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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