linux-kernel - Re: [PATCH] fs-writeback: fix NULL pointer dereference in, __mark_inode

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Message-ID: <4D7F5E2B.6090805@secunet.com>
Date:	Tue, 15 Mar 2011 13:40:11 +0100
From:	Torsten Hilbrich <torsten.hilbrich@...unet.com>
To:	Anton Altaparmakov <aia21@....ac.uk>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Andreas Bießmann 
	<biessmann@...science.de>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH] fs-writeback: fix NULL pointer dereference in, __mark_inode_dirty

On 15.03.2011 13:11, Anton Altaparmakov wrote:

> This is already being handled.  It is the same as other bug reports, i.e. the fact that sb->s_bdi is made NULL on device removal and if it happens at the wrong time you then get a NULL pointer dereference.
> 
> Jens Axboe just only yesterday posted an initial patch for this.  Can you please test it and report back if it does indeed cure the problem?
> 
> The patch can be found here for example:
> 
> 	https://lkml.org/lkml/2011/3/14/25
> 

This patch fixes the problem for my test szenario.

	Torsten

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