linux-ext4 - Re: [Bug 11175] New: ext3 BUG in add_dirent_to

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Message-ID: <488FDA0A.5020408@redhat.com>
Date:	Tue, 29 Jul 2008 22:03:38 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Theodore Tso <tytso@....EDU>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-ext4@...r.kernel.org, bugme-daemon@...zilla.kernel.org,
	kernel.bugzilla@...eesh.org
Subject: Re: [Bug 11175] New: ext3 BUG in add_dirent_to_buf+0x6c/0x269

Theodore Tso wrote:
> Hmm... disassembling the code, it's pretty clear the problem is here
> in do_split(), around line 1208:
> 
> 	map = (struct dx_map_entry *) (data2 + blocksize);
> 	count = dx_make_map ((struct ext3_dir_entry_2 *) data1,
> 			     blocksize, hinfo, map);
> 	map -= count;
> 	dx_sort_map (map, count);
> 	/* Split the existing block in the middle, size-wise */
> 	size = 0;
> 	move = 0;
> 	for (i = count-1; i >= 0; i--) {
> 		/* is more than half of this entry in 2nd half of the block? */
> 		if (size + map[i].size/2 > blocksize/2)  <====

You sure this isn't our old friend
https://bugzilla.redhat.com/show_bug.cgi?id=451068 ?

which version of gcc compiled this?

-Eric
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