linux-ext4 - Re: [PATCH 50/74] libext2fs: support allocating uninit blocks in bmap2()

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Message-ID: <20140115222331.GB12057@thunk.org>
Date:	Wed, 15 Jan 2014 17:23:31 -0500
From:	Theodore Ts'o <tytso@....edu>
To:	"Darrick J. Wong" <darrick.wong@...cle.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 50/74] libext2fs: support allocating uninit blocks in
 bmap2()

On Wed, Jan 15, 2014 at 05:19:51PM -0500, Theodore Ts'o wrote:
> 	{
> 		struct ext2_inode t;
> 
> 		ext2fs_read_inode(fs, *ino, &t);
> 		printf("i_size_high: %lu size: %llu\n", t.i_size_high,
> 		       EXT2_I_SIZE(&t));
> 	}

Oops, ignore this debugging code.  This was to find a bug in
ext2fs_extents_insert() where under some circumstances it end up
running into a buffer overrun bug which causes it to wipe out
i_size_high.

						- Ted
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