Re: [PATCH] Fix root hole in pktcdvd

[Al Viro]

On Tue, May 17, 2005 at 06:00:25AM +0100, Al Viro wrote:
> Same comment as for previous patch.  I'll take a look at that sucker,
> it might happen to be OK, seeing that most of the bdev ->ioctl() instances
> ignore file argument and we might get away with passing odd stuff to
> anything that could occur here.

Oh, lovely - pkt_open() opens underlying device, unless we already have our
device opened.  Guess what happens if you open() with O_RDONLY and
then - with O_RDWR?
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