linux-kernel - Re: tty_ldisc_try_get(): BUG kmalloc-8: Poison overwritten

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Message-ID: <tnxhbyhuaky.fsf@pc1117.cambridge.arm.com>
Date:	Mon, 15 Jun 2009 10:10:05 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Pekka Enberg <penberg@...helsinki.fi>,
	Vegard Nossum <vegard.nossum@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: tty_ldisc_try_get(): BUG kmalloc-8: Poison overwritten

Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> On Sun, 14 Jun 2009 10:10:52 +0200
> Ingo Molnar <mingo@...e.hu> wrote:
>> Ok, this is one for those who like to look at weird crashes/bugs.
>> 
>> Here's a new regression that popped up in this merge window, there's 
>> some sort of slab corruption going on in tty data structures:
>
> I split the ldisc and tty apart and redid the ldisc locking so its a fair
> bet I know what changeset is to blame, will just need to hunt it down a
> bit. kmemcheck found one leak case on Friday which I've fixed but not yet
> scribbles.

That was kmemleak :-).

-- 
Catalin
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