[PATCH v2] lsm,io_uring: add LSM hooks for the new uring_cmd file op

[Luis Chamberlain]

On Wed, Aug 10, 2022 at 02:39:54PM -0400, Paul Moore wrote:
> On Wed, Aug 10, 2022 at 2:14 PM Luis Chamberlain <mcgrof at kernel.org> wrote:
> >
> > On Fri, Jul 15, 2022 at 01:28:35PM -0600, Jens Axboe wrote:
> > > On 7/15/22 1:16 PM, Luis Chamberlain wrote:
> > > > io-uring cmd support was added through ee692a21e9bf ("fs,io_uring:
> > > > add infrastructure for uring-cmd"), this extended the struct
> > > > file_operations to allow a new command which each subsystem can use
> > > > to enable command passthrough. Add an LSM specific for the command
> > > > passthrough which enables LSMs to inspect the command details.
> > > >
> > > > This was discussed long ago without no clear pointer for something
> > > > conclusive, so this enables LSMs to at least reject this new file
> > > > operation.
> > >
> > > From an io_uring perspective, this looks fine to me. It may be easier if
> > > I take this through my tree due to the moving of the files, or the
> > > security side can do it but it'd have to then wait for merge window (and
> > > post io_uring branch merge) to do so. Just let me know. If done outside
> > > of my tree, feel free to add:
> > >
> > > Acked-by: Jens Axboe <axboe at kernel.dk>
> >
> > Paul, Casey, Jens,
> >
> > should this be picked up now that we're one week into the merge window?
> 
> Your timing is spot on!  I wrapped up a SELinux/SCTP issue by posting
> the patches yesterday and started on the io_uring/CMD patches this
> morning :)
> 
> Give me a few days to get this finished, tested, etc. and I'll post a
> patchset with your main patch, the Smack patch from Casey, the SELinux
> patch, and the /dev/null patch so we can all give it a quick sanity
> check before I merge it into the LSM/stable branch and send it to
> Linus.  Does that sound okay?

Works with me! But just note I'll be away on vacation starting tomorrow
in the woods looking for Bigfoot with my dog, so I won't be around. And
I suspect Linus plans to release 6.0 on Sunday, if the phb-crystall-ball [0]
is still as accurate.

[0] http://deb.tandrin.de/phb-crystal-ball.htm

  Luis