On 02/02/2017 10:44, Christoph Hellwig wrote:
> ec8013bedd ("dm: do not forward ioctls from logical volumes to the
> underlying device"),
>
> The trivial fix would be to add a select of the SCSI_REQUEST symbol
> to dm, but my gut feeling teels me the call is simply wrong, and
> should be removed and instead all ioctls on DM devices that don't
> map to a full underlying devices should be rejected.
I would certainly be fine with that. It would not be surprising if
something broke, but a middle ground could be to allow all ioctls if you
have CAP_SYS_RAWIO and none if you don't.
Paolo
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