RDMA: Verify port when creating flow rule

In the Linux kernel, the following vulnerability has been resolved:

RDMA: Verify port when creating flow rule

Validate port value provided by the user and with that remove no longer

needed validation by the driver. The missing check in the mlx5_ib driver

could cause to the below oops.

Call trace:

_create_flow_rule+0x2d4/0xf28 [mlx5_ib]

mlx5_ib_create_flow+0x2d0/0x5b0 [mlx5_ib]

ib_uverbs_ex_create_flow+0x4cc/0x624 [ib_uverbs]

ib_uverbs_handler_UVERBS_METHOD_INVOKE_WRITE+0xd4/0x150 [ib_uverbs]

ib_uverbs_cmd_verbs.isra.7+0xb28/0xc50 [ib_uverbs]

ib_uverbs_ioctl+0x158/0x1d0 [ib_uverbs]

do_vfs_ioctl+0xd0/0xaf0

ksys_ioctl+0x84/0xb4

__arm64_sys_ioctl+0x28/0xc4

el0_svc_common.constprop.3+0xa4/0x254

el0_svc_handler+0x84/0xa0

el0_svc+0x10/0x26c

Code: b9401260 f9615681 51000400 8b001c20 (f9403c1a)