RDMA/irdma: Prevent zero-length STAG registration

mainline inclusion
from mainline-v6.6-rc1
commit bb6d73d9
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7YFVN
CVE: CVE-2023-25775

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bb6d73d9add68ad270888db327514384dfa44958



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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.

Fixes: b48c24c2 ("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>
Link: https://lore.kernel.org/r/20230818144838.1758-1-shiraz.saleem@intel.com


Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Liu Jian <liujian56@huawei.com>

Conflicts:
	drivers/infiniband/hw/i40iw/i40iw_ctrl.c
	drivers/infiniband/hw/i40iw/i40iw_type.h
	drivers/infiniband/hw/i40iw/i40iw_verbs.c
	drivers/infiniband/hw/irdma/ctrl.c
	drivers/infiniband/hw/irdma/type.h
	drivers/infiniband/hw/irdma/verbs.c