linux-kernel - Re: [PATCH] Forbid user to change file flags on quota files

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Message-ID: <20071105103230.GA9561@duck.suse.cz>
Date:	Mon, 5 Nov 2007 11:32:30 +0100
From:	Jan Kara <jack@...e.cz>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
Cc:	linux-kernel@...r.kernel.org,
	LIOU Payphone <lioupayphone@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Forbid user to change file flags on quota files

On Fri 02-11-07 18:32:08, Jan Engelhardt wrote:
> 
> On Nov 1 2007 16:52, Jan Kara wrote:
> 
> >--- linux-2.6.24-rc1/fs/ext2/ioctl.c	2007-10-24 20:43:56.000000000 +0200
> >+++ linux-2.6.24-rc1-1-forbid_setflags/fs/ext2/ioctl.c	2007-11-01 16:01:26.000000000 +0100
> >@@ -47,6 +47,11 @@ int ext2_ioctl (struct inode * inode, st
> > 			flags &= ~EXT2_DIRSYNC_FL;
> > 
> > 		mutex_lock(&inode->i_mutex);
> >+		/* Is it quota file? Don't allow user mess with it */
> 
> "Do not allow user to mess with it".
  I think both "allow user mess" and "allow user to mess" are possible, maybe
with a slightly different meanings. If you are confident that the first one
is not correct in this place, I can change it :)

> >--- linux-2.6.24-rc1/fs/ext3/ioctl.c	2007-10-11 12:01:23.000000000 +0200
> >--- linux-2.6.24-rc1/fs/ext4/ioctl.c	2007-10-11 12:01:23.000000000 +0200
> >--- linux-2.6.24-rc1/fs/jfs/ioctl.c	2007-10-11 12:01:23.000000000 +0200
> >--- linux-2.6.24-rc1/fs/reiserfs/ioctl.c	2007-10-24 20:43:58.000000000 +0200
> 
> And the other filesystems are all fine?
  I'm not sure what you mean... Forbidding IOC_SETFLAGS for them on quota
files is fine.

									Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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