linux-kernel - Re: [Bug 8473] New: Oops: 0010 [1] SMP

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Message-Id: <1180206615.3430.8.camel@rousalka.dyndns.org>
Date:	Sat, 26 May 2007 21:10:15 +0200
From:	Nicolas Mailhot <nicolas.mailhot@...oste.net>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...zilla.kernel.org>, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@....ul.ie>,
	Christoph Lameter <clameter@....com>
Subject: Re: [Bug 8473] New: Oops: 0010 [1] SMP

Le jeudi 17 mai 2007 à 18:59 +0200, Nicolas Mailhot a écrit :
> Le jeudi 17 mai 2007 à 09:45 -0700, Randy Dunlap a écrit :
> 
> > Can you boot with "kstack=32" so that we can see more of the stack?
> 
> I can try. It's not triggering quickly though

Seems I was completely wrong about the trigger, but anyway it happened
again, this time on 2.6.22-rc2.mm1.cfs14 (and I had kept kstack=32)

 BUG: using smp_processor_id() in preemptible [00000001] code: bash/3857
 caller is oops_begin+0xb/0x6f
 
 Call Trace:
 [<ffffffff8020ab4d>] show_trace+0x34/0x4f
 [<ffffffff8020ab7a>] dump_stack+0x12/0x17
 [<ffffffff8030d92d>] debug_smp_processor_id+0xad/0xbc
 [<ffffffff8042388f>] oops_begin+0xb/0x6f
 [<ffffffff8042520b>] do_page_fault+0x66a/0x7c0
 [<ffffffff804234bd>] error_exit+0x0/0x84
 
 Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: 
 [<0000000000000000>]
 PGD bdd2067 PUD c133067 PMD 0 
 Oops: 0010 [1] PREEMPT SMP 
 CPU 1 
 Pid: 3857, comm: bash Not tainted 2.6.22-0.8.rc2.mm1.cfs14.fc8.nim #1
 RIP: 0010:[<0000000000000000>]  [<0000000000000000>]
 RSP: 0018:ffff81000cb03ee0  EFLAGS: 00010296
 RAX: ffffffff8044dbc0 RBX: ffff81000c3aa8c0 RCX: 00007fff549dcae4
 RDX: 0000000000005410 RSI: ffff81000c3aa8c0 RDI: ffff81000ba913d8
 RBP: 00007fff549dcae4 R08: 0000000000000000 R09: 00000000ffffffff
 R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000005410
 R13: 00000000000000ff R14: 00000000000000ff R15: 0000000000000000
 FS:  00002b06560d8f40(0000) GS:ffff810004017180(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
 CR2: 0000000000000000 CR3: 000000000bc55000 CR4: 00000000000006e0
 Process bash (pid: 3857, threadinfo ffff81000cb02000, task ffff81000adc59a0)
 Stack:  ffffffff8028ada9 ffff81000c3aa8c0 00007fff549dcae4 00007fff549dcae4
 ffffffff8028b016 0000000000005410 00000000000000ff ffff81000c3aa8c0
 0000000000000000 00007fff549dcae4 0000000000005410 00000000000000ff
 ffffffff8028b088 0000000000000000 0000000080209571 00000000ffffffff
 00007fff549dce87 0000000000000f11 00007fff549dcfb8 00007fff549dddb0
 ffffffff802095dc 0000000000000246 0000000000000008 00000000ffffffff
 0000000000000000 ffffffffffffffda ffffffffffffffff 00007fff549dcae4
 0000000000005410 00000000000000ff 0000000000000010 0000003d340c9117
 Call Trace:
 Inexact backtrace:
 [<ffffffff8028ada9>] do_ioctl+0x55/0x6b
 [<ffffffff8028b016>] vfs_ioctl+0x257/0x270
 [<ffffffff8028b088>] sys_ioctl+0x59/0x79
 [<ffffffff802095dc>] tracesys+0xdc/0xe1
 
 INFO: lockdep is turned off.
 
 Code:  Bad RIP value.
 RIP  [<0000000000000000>]
 RSP <ffff81000cb03ee0>
 CR2: 0000000000000000

-- 
Nicolas Mailhot

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