Re: [PATCH 5.15.x] RDMA/irdma: Prevent zero-length STAG registration

[Greg KH <gregkh@linuxfoundation.org>]

On Fri, Dec 15, 2023 at 01:29:39PM -0600, Shiraz Saleem wrote:
> From: Christopher Bednarz <christopher.n.bednarz@intel.com>
> 
> [Upstream commit bb6d73d9add68ad270888db327514384dfa44958]
> 
> Currently irdma allows zero-length STAGs to be programmed in HW during
> the kernel mode fast register flow. Zero-length MR or STAG registration
> disable HW memory length checks.
> 
> Improve gaps in bounds checking in irdma by preventing zero-length STAG or
> MR registrations except if the IB_PD_UNSAFE_GLOBAL_RKEY is set.
> 
> This addresses the disclosure CVE-2023-25775.
> 
> The kernel version to apply this patch is 5.15.x.
> 
> Fixes: b48c24c2d710 ("RDMA/irdma: Implement device supported verb APIs")
> Signed-off-by: Christopher Bednarz <christopher.n.bednarz@intel.com>
> Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
> ---
>  drivers/infiniband/hw/irdma/ctrl.c  |  6 ++++++
>  drivers/infiniband/hw/irdma/type.h  |  2 ++
>  drivers/infiniband/hw/irdma/verbs.c | 10 ++++++++--
>  3 files changed, 16 insertions(+), 2 deletions(-)

Now queued up, thanks.

greg k-h