linux-kernel - Re: [PATCH] Kprobes: Fix locking imbalance in kretprobes

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Message-ID: <20090318115158.GF32233@elte.hu>
Date:	Wed, 18 Mar 2009 12:51:58 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Jim Keniston <jkenisto@...ibm.com>, bharata@...ux.vnet.ibm.com
Subject: Re: [PATCH] Kprobes: Fix locking imbalance in kretprobes


* Ananth N Mavinakayanahalli <ananth@...ibm.com> wrote:

> Fix locking imbalance in kretprobes:
> 
> =====================================
> [ BUG: bad unlock balance detected! ]
> -------------------------------------
> kthreadd/2 is trying to release lock (&rp->lock) at:
> [<c06b3080>] pre_handler_kretprobe+0xea/0xf4

Applied it to tip:tracing/kprobes, thanks Ananth!

The bug has been introduced in v2.6.27-rc1 so i've marked it for a 
-stable backport for .27.x, 28.x and 29.x.

	Ingo
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