linux-ext4 - Re: [PATCH] mke2fs: add support to align hugefiles relative to beginning of the disk

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Date:	Fri, 11 Jul 2014 12:48:10 -0700
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	"Theodore Ts'o" <tytso@....edu>
Cc:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] mke2fs: add support to align hugefiles relative to
 beginning of the disk

On Fri, Jul 11, 2014 at 03:37:33PM -0400, Theodore Ts'o wrote:
> On Fri, Jul 11, 2014 at 11:25:58AM -0700, Darrick J. Wong wrote:
> > The third argument is the maximum number of bytes to concatenate from the
> > second argument ("/start").  Though it's unlikely that we'll ever find anything
> > in /sys/block approaching 255 characters, we might as well guard against stack
> > corruption:
> > 
> > 	if (strlen(path) > SYSFS_PATH_LEN - strlen("/start") - 1)
> > 		return 0;
> > 	strcat(path, "/start");
> > 
> > Oh, I guess coverity is complaining about this too.
> > 
> > Though FWIW, "find /sys | while read f; do echo "$f" | wc -c; done | sort -g |
> > tail -n 5" spits out "133" as the longest sysfs path ever.  I guess that could
> > be much longer on some multi-node NUMA box or whatever.
> > 
> > <shrug> /me codes up a fix, tosses it on the patch pile.
> 
> Already fixed on the maint branch.

Oh, I guess git.kernel.org is out of date. :/

--D
> 
> Cheers,
> 
> 						- Ted
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