linux-kernel - Re: [BUG][reiserfs] page fault during kernel boot

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Message-ID: <20100817223026.GB5461@nowhere>
Date:	Wed, 18 Aug 2010 00:30:28 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Marin Mitov <mitov@...p.bas.bg>
Cc:	linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
	Andrew Benton <b3nton@...il.com>
Subject: Re: [BUG][reiserfs] page fault during kernel boot

On Tue, Aug 17, 2010 at 11:25:25AM +0300, Marin Mitov wrote:
> Hi all,
> 
> The function: reiserfs_evict_inode() ends with:
> 
> <snip>
> out:
> 	end_writeback(inode);	/* note this must go after the journal_end to prevent deadlock */
> 	dquot_drop(inode);
> 	inode->i_blocks = 0;
> 	reiserfs_write_unlock_once(inode->i_sb, depth);
> 
> no_delete:
> 	end_writeback(inode);
> 	dquot_drop(inode);
> }
> <snip>
> 
> When goto out path is taken,
> 
> end_writeback(inode);
> dquot_drop(inode);
> 
> are executed twice, leading to page fault (in my case) during the kernel boot.
> 
> Add return; before no_delete label (but I am not quite sure that this is correct :-).
> 
> Signed-off-by: Marin Mitov <mitov@...p.bas.bg>


In fact the sam patch has been submitted and applied to the vfs tree already:

http://lkml.org/lkml/2010/8/11/98

The patch will probably reach mainline soon.

Thanks.

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