linux-kernel - Re: [PATCH] kmemleak: Protect the seq start/next/stop sequence by rcu_read

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Date:	Wed, 29 Jul 2009 17:00:07 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Catalin Marinas <catalin.marinas@....com>
Cc:	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kmemleak: Protect the seq start/next/stop sequence by
 rcu_read_lock()

On Wed, 29 Jul 2009 16:26:57 +0100
Catalin Marinas <catalin.marinas@....com> wrote:

> Objects passed to kmemleak_seq_next() have an incremented reference
> count (hence not freed) but they may point via object_list.next to
> other freed objects. To avoid this, the whole start/next/stop sequence
> must be protected by rcu_read_lock().
> 
> Signed-off-by: Catalin Marinas <catalin.marinas@....com>
> ---
> 
> This is a fix for bug #13761 in buzilla.kernel.org. If there are no
> objections, please apply it before 2.6.31. Thanks.

Administrivia:

When referencing a bugzilla report, please quote the full URL within
the changelog (not after the ^---$).  I use:

	Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13761

This is because people ocassionally troll the commit logs, closing off
bugzilla reports.  Using a standardised format simplifies that job, and
makes it more reliable.

Also, it's nice to give the original bug reporter a Reported-by: in the
changelog.  As a little thank-you, and so they know what's going on.

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