All of lore.kernel.org
 help / color / mirror / Atom feed
From: Thomas Gleixner <tglx@linutronix.de>
To: Nikolay Borisov <kernel@kyup.com>
Cc: "Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>,
	Jiri Slaby <jslaby@suse.cz>, Oleg Nesterov <oleg@redhat.com>,
	SiteGround Operations <operations@siteground.com>
Subject: Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code
Date: Thu, 4 Feb 2016 09:56:00 +0100 (CET)	[thread overview]
Message-ID: <alpine.DEB.2.11.1602040954310.25254@nanos> (raw)
In-Reply-To: <56B1DD62.9030900@kyup.com>

On Wed, 3 Feb 2016, Nikolay Borisov wrote:
> 
> It seems when the code tries to do prev->next = next in __list_del from detach_timer, 
> rax has a value of dead000000200200 (LIST_POISON2).

> So in this case the prev/next entries do not look like corrupted, whereas
> when manipulating the list inside detach_timer they do. This is really
> odd, any ideas how to further debug this?

Please enable

CONFIG_DEBUG_OBJECTS
CONFIG_DEBUG_OBJECTS_TIMERS
CONFIG_DEBUG_OBJECTS_WORK

That should pinpoint the offending code.

Thanks,

	tglx

  reply	other threads:[~2016-02-04  8:57 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-03 10:58 crash in 3.12.51 (likely in 3.12.52 as well) in timer code Nikolay Borisov
2016-02-04  8:56 ` Thomas Gleixner [this message]
2016-02-04 11:32 ` Mike Galbraith
2016-02-04 11:51   ` Nikolay Borisov
2016-02-04 12:17     ` Mike Galbraith
2016-02-04 12:21       ` Nikolay Borisov
2016-02-04 12:27         ` Mike Galbraith

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.DEB.2.11.1602040954310.25254@nanos \
    --to=tglx@linutronix.de \
    --cc=jslaby@suse.cz \
    --cc=kernel@kyup.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=oleg@redhat.com \
    --cc=operations@siteground.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.