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From: Peter Zijlstra <peterz@infradead.org>
To: Fengguang Wu <fengguang.wu@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Byungchul Park <byungchul.park@lge.com>,
	Ingo Molnar <mingo@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	LKP <lkp@01.org>
Subject: Re: [lockdep] b09be676e0 BUG: unable to handle kernel NULL pointer dereference at 000001f2
Date: Mon, 9 Oct 2017 14:54:04 +0200	[thread overview]
Message-ID: <20171009125404.nxo5zke62cv42x2s@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20171009122113.nj2tn22mt2oxptvr@wfg-t540p.sh.intel.com>

On Mon, Oct 09, 2017 at 08:21:13PM +0800, Fengguang Wu wrote:
> > > From e7840ad76515f0b5061fcdd098b57b7c01b61482 Mon Sep 17 00:00:00 2001
> > > Message-Id: <e7840ad76515f0b5061fcdd098b57b7c01b61482.1507215196.git.jpoimboe@redhat.com>
> > > From: Josh Poimboeuf <jpoimboe@redhat.com>
> > > Date: Thu, 5 Oct 2017 09:43:59 -0500
> > > Subject: [PATCH 1/2] unwinder fixes
> > > 
> > > ---
> > >  arch/x86/kernel/unwind_frame.c | 33 ++++++++++++++++++++++++++++++---
> 
> I just test 316 boots and see 7 WARNINGs:
> 
> [  404.948035] WARNING: kernel stack frame pointer at c6ea3ecd in init:212 has bad value   (null)
> [  298.118383] WARNING: kernel stack frame pointer at cde07dad in init:1 has bad value bc000000
> [  112.848677] WARNING: kernel stack frame pointer at cde07dbd in swapper/0:1 has bad value c2000000
> [  127.942417] WARNING: kernel stack frame pointer at cf95de71 in rb_producer:50 has bad value 03cf95de
> [    4.736938] WARNING: kernel stack frame pointer at bf643d59 in kworker/0:1:15 has bad value b5000000
> [  308.260066] WARNING: kernel stack frame pointer at bde07da5 in udevd:155 has bad value b5bfa17b
> 
> [  277.473596] WARNING: CPU: 0 PID: 520 at kernel/locking/lockdep.c:3841 check_flags+0x119/0x1b0

That's much better than NULL pointer derefs. Is there any chance I could
get your userspace image such that I can try and repro?

It appears to run trinity..

And you're still using the same .config from the original report?

WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: lkp@lists.01.org
Subject: Re: [lockdep] b09be676e0 BUG: unable to handle kernel NULL pointer dereference at 000001f2
Date: Mon, 09 Oct 2017 14:54:04 +0200	[thread overview]
Message-ID: <20171009125404.nxo5zke62cv42x2s@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20171009122113.nj2tn22mt2oxptvr@wfg-t540p.sh.intel.com>

[-- Attachment #1: Type: text/plain, Size: 1482 bytes --]

On Mon, Oct 09, 2017 at 08:21:13PM +0800, Fengguang Wu wrote:
> > > From e7840ad76515f0b5061fcdd098b57b7c01b61482 Mon Sep 17 00:00:00 2001
> > > Message-Id: <e7840ad76515f0b5061fcdd098b57b7c01b61482.1507215196.git.jpoimboe@redhat.com>
> > > From: Josh Poimboeuf <jpoimboe@redhat.com>
> > > Date: Thu, 5 Oct 2017 09:43:59 -0500
> > > Subject: [PATCH 1/2] unwinder fixes
> > > 
> > > ---
> > >  arch/x86/kernel/unwind_frame.c | 33 ++++++++++++++++++++++++++++++---
> 
> I just test 316 boots and see 7 WARNINGs:
> 
> [  404.948035] WARNING: kernel stack frame pointer at c6ea3ecd in init:212 has bad value   (null)
> [  298.118383] WARNING: kernel stack frame pointer at cde07dad in init:1 has bad value bc000000
> [  112.848677] WARNING: kernel stack frame pointer at cde07dbd in swapper/0:1 has bad value c2000000
> [  127.942417] WARNING: kernel stack frame pointer at cf95de71 in rb_producer:50 has bad value 03cf95de
> [    4.736938] WARNING: kernel stack frame pointer at bf643d59 in kworker/0:1:15 has bad value b5000000
> [  308.260066] WARNING: kernel stack frame pointer at bde07da5 in udevd:155 has bad value b5bfa17b
> 
> [  277.473596] WARNING: CPU: 0 PID: 520 at kernel/locking/lockdep.c:3841 check_flags+0x119/0x1b0

That's much better than NULL pointer derefs. Is there any chance I could
get your userspace image such that I can try and repro?

It appears to run trinity..

And you're still using the same .config from the original report?

  reply	other threads:[~2017-10-09 12:54 UTC|newest]

Thread overview: 102+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-03 14:06 [lockdep] b09be676e0 BUG: unable to handle kernel NULL pointer dereference at 000001f2 Fengguang Wu
2017-10-03 14:06 ` Fengguang Wu
2017-10-03 14:31 ` Josh Poimboeuf
2017-10-03 14:31   ` Josh Poimboeuf
2017-10-03 14:41   ` Josh Poimboeuf
2017-10-03 14:41     ` Josh Poimboeuf
2017-10-03 15:05     ` Josh Poimboeuf
2017-10-03 15:05       ` Josh Poimboeuf
2017-10-03 16:28       ` Josh Poimboeuf
2017-10-03 16:28         ` Josh Poimboeuf
2017-10-03 17:34         ` Josh Poimboeuf
2017-10-03 17:34           ` Josh Poimboeuf
2017-10-03 21:44           ` Tetsuo Handa
2017-10-03 21:44             ` Tetsuo Handa
2017-10-04 21:06             ` Josh Poimboeuf
2017-10-04 21:06               ` Josh Poimboeuf
2017-10-04 21:30               ` Linus Torvalds
2017-10-04 21:30                 ` Linus Torvalds
2017-10-04 22:15                 ` Josh Poimboeuf
2017-10-04 22:15                   ` Josh Poimboeuf
2017-10-04 22:40             ` Josh Poimboeuf
2017-10-04 22:40               ` Josh Poimboeuf
2017-10-05 11:02               ` Tetsuo Handa
2017-10-05 11:02                 ` Tetsuo Handa
2017-10-05 13:57                 ` Josh Poimboeuf
2017-10-05 13:57                   ` Josh Poimboeuf
2017-10-04  8:34       ` Peter Zijlstra
2017-10-04  8:34         ` Peter Zijlstra
2017-10-10  5:57         ` Byungchul Park
2017-10-10  5:57           ` Byungchul Park
2017-10-03 16:54 ` Linus Torvalds
2017-10-03 16:54   ` Linus Torvalds
2017-10-03 16:57   ` Linus Torvalds
2017-10-03 16:57     ` Linus Torvalds
2017-10-10  5:48     ` Byungchul Park
2017-10-10  5:48       ` Byungchul Park
2017-10-10 16:22       ` Linus Torvalds
2017-10-10 16:22         ` Linus Torvalds
2017-10-10 16:56         ` Linus Torvalds
2017-10-10 16:56           ` Linus Torvalds
2017-10-10 18:14           ` Peter Zijlstra
2017-10-10 18:14             ` Peter Zijlstra
2017-10-10 18:38             ` Linus Torvalds
2017-10-10 18:38               ` Linus Torvalds
2017-10-11  1:14             ` Byungchul Park
2017-10-11  1:14               ` Byungchul Park
2017-10-11  2:36           ` Byungchul Park
2017-10-11  2:36             ` Byungchul Park
2017-10-11  0:56         ` Byungchul Park
2017-10-11  0:56           ` Byungchul Park
2017-10-11  1:02           ` Byungchul Park
2017-10-11  1:02             ` Byungchul Park
2017-10-12  1:15           ` Byungchul Park
2017-10-12  1:15             ` Byungchul Park
2017-10-03 17:18   ` Ingo Molnar
2017-10-03 17:18     ` Ingo Molnar
2017-10-04  9:20     ` Peter Zijlstra
2017-10-04  9:20       ` Peter Zijlstra
2017-10-04 10:31       ` Ingo Molnar
2017-10-04 10:31         ` Ingo Molnar
2017-10-04 14:15       ` Josh Poimboeuf
2017-10-04 14:15         ` Josh Poimboeuf
2017-10-10  5:30     ` Byungchul Park
2017-10-10  5:30       ` Byungchul Park
2017-10-05 13:01   ` Josh Poimboeuf
2017-10-05 13:01     ` Josh Poimboeuf
2017-10-05 14:54     ` Josh Poimboeuf
2017-10-05 14:54       ` Josh Poimboeuf
2017-10-09 10:50       ` Peter Zijlstra
2017-10-09 10:50         ` Peter Zijlstra
2017-10-09 12:21         ` Fengguang Wu
2017-10-09 12:21           ` Fengguang Wu
2017-10-09 12:54           ` Peter Zijlstra [this message]
2017-10-09 12:54             ` Peter Zijlstra
2017-10-09 12:59             ` Fengguang Wu
2017-10-09 12:59               ` Fengguang Wu
2017-10-09 13:03             ` Josh Poimboeuf
2017-10-09 13:03               ` Josh Poimboeuf
2017-10-09 12:55           ` Fengguang Wu
2017-10-09 12:55             ` Fengguang Wu
2017-10-09 13:26             ` Josh Poimboeuf
2017-10-09 13:26               ` Josh Poimboeuf
2017-10-09 14:17               ` Fengguang Wu
2017-10-09 14:17                 ` Fengguang Wu
2017-10-09 15:28                 ` Peter Zijlstra
2017-10-09 15:28                   ` Peter Zijlstra
2017-10-09 15:41                   ` Fengguang Wu
2017-10-09 15:41                     ` Fengguang Wu
2017-10-09 15:44                     ` Peter Zijlstra
2017-10-09 15:44                       ` Peter Zijlstra
2017-10-09 15:47                       ` Fengguang Wu
2017-10-09 15:47                         ` Fengguang Wu
2017-10-10  5:08   ` Byungchul Park
2017-10-10  5:08     ` Byungchul Park
2017-10-12  8:47 ` Peter Zijlstra
2017-10-12  8:47   ` Peter Zijlstra
2017-10-12  9:21   ` Fengguang Wu
2017-10-12  9:21     ` Fengguang Wu
2017-10-12  9:28     ` Fengguang Wu
2017-10-12  9:28       ` Fengguang Wu
2017-10-12 11:45       ` Peter Zijlstra
2017-10-12 11:45         ` Peter Zijlstra

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