Re: [RFC] ext2 and ext3 block reservations can be bypassed

Christoph Hellwig (hch@infradead.org)
Mon, 13 May 2002 18:57:23 +0100


On Mon, May 13, 2002 at 10:52:50AM -0700, Elladan wrote:
> > It is _not_ a security feature, it is meant to keep the filesystem from
> > fragmenting too badly. root can use that space, since root can do whatever
> > she wants anyway.
>
> But it *appears* to be a security feature. Thus, someone might
> incorrectly depend on it, unless it's clearly documented as otherwise.

So what. People rely on chroot() as security feature all the time and
we don't "fix" it either. If you need security nothing but gaining
knowledge about all details helps.

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