linux-kernel - Bug in UDF, setting larger file size when data in ICB

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Date:	Mon, 23 Jul 2012 16:19:35 +0100
From:	Ian Abbott <abbotti@....co.uk>
To:	lkml <linux-kernel@...r.kernel.org>
CC:	Jan Kara <jack@...e.cz>
Subject: Bug in UDF, setting larger file size when data in ICB

Hi folks,

in fs/udf/inode.c, udf_setsize(), if the new size is larger than the old 
size and the old data is in the ICB and the new size still fits in the 
ICB (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB and iinfo->i_lenAlloc 
= newsize), udf_extend_file() is called which promptly calls BUG() 
because it does not like this i_alloc_type value.

I think the simplest fix would be to add a 'goto' after the assignment 
to iinfo->i_lenAlloc, bypassing the call to udf_extend_file().

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk>        )=-
-=( Tel: +44 (0)161 477 1898   FAX: +44 (0)161 718 3587         )=-
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