linux-kernel - Re: [PATCH] posix-timer: fix deletion race

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1184824221.12353.526.camel@chaos>
Date:	Thu, 19 Jul 2007 07:50:21 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Jeremy Katz <jeremy.katz@...driver.com>
Cc:	linux-kernel@...r.kernel.org, Andrew Morton <akpm@...l.org>,
	Ingo Molnar <mingo@...e.hu>, Oleg Nesterov <oleg@...sign.ru>,
	Stable Team <stable@...nel.org>
Subject: Re: [PATCH] posix-timer: fix deletion race

On Wed, 2007-07-18 at 16:43 -0700, Jeremy Katz wrote:
> On Wed, 18 Jul 2007, Jeremy Katz wrote:
> 
> > On Wed, 18 Jul 2007, Thomas Gleixner wrote:
> >
> >>> Also can you please enable CONFIG_PROVE_LOCKING, which might catch any
> >>> locking problem, which might be related to this.
> >> 
> >> Another test: Can you please disable CONFIG_SCHED_SMT to narrow it down
> >> further ?
> >
> > I'll try both of these.
> 
> I'm still seeing the sys_timer_delete version with your patch, and 
> sys_timer_delete and posix_timer_event without. The itimer_delete version 
> is currently missing in action, but getting any particular one to perform 
> on demand is currently not in my power.

Ok, let me summarize:

2.6.22 + hrt6

Both problems are there whether CONFIG_SCHED_SMT is on or not

2.6.22 + hrt6 + posixtimer patch

Both problems are there whether CONFIG_SCHED_SMT is on
The timer callback problem is gone when CONFIG_SCHED_SMT is off

Correct ?

	tglx


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/