linux-kernel - Re: [PATCH] kernfs: fix a subdir count leak

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Message-ID: <20140417131918.GI26632@htj.dyndns.org>
Date:	Thu, 17 Apr 2014 09:19:18 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Jianyu Zhan <nasa4836@...il.com>
Cc:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernfs: fix a subdir count leak

On Thu, Apr 17, 2014 at 05:52:10PM +0800, Jianyu Zhan wrote:
> Currently kernfs_link_sibling() increates parent->dir.subdirs before
> adding the node into parent's chidren rb tree.
> 
> Because it is possible that kernfs_link_sibling() couldn't find
> a suitable slot and bail out, this leads to a mismatch between
> elevated subdir count with actual children node numbers.
> 
> This patches fix this problem, by moving the subdir accouting
> after the actual addtion happening.
> 
> Signed-off-by: Jianyu Zhan <nasa4836@...il.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun
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