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

[Paul Moore]

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?

-- 
paul-moore.com