Fix XFRM flags validity check

[Bodong Wang]

* Explain the bug(s)
commit a3ca11eec78 introduced a flags validity check for XFRM , the check excluded flag XFRM_OFFLOAD_FULL from the check hence the flag is being blocked from getting to the kernel space.
The above is preventing IPsec states from being added with the full_offload option.

* Brief explanation of fixes
The commit restricted unknown flags from being configured from user space by adding a validity check,
since the Bluefield feature added such a flag , the fix expands the validity check to include this flag which is added
only in Bluefield kernel .

* How to test
Need to make sure that configuring IPsec with full_offload option using IProute2 can be done successfully with no issues.
(Not getting the RTNETLINK answers: Invalid argument error anymore)

* What it could break.
NA, this patch allows a specific flag to get passed to the kernel space, the kernel was using this flag already however after validity check got introduced the flag just got blocked from getting to the kernel.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the linux-bluefield/5.4.0-1040.44 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-bluefield - 5.4.0-1040.44

---------------
linux-bluefield (5.4.0-1040.44) focal; urgency=medium

  * focal/linux-bluefield: 5.4.0-1040.44 -proposed tracker (LP: #1978639)

  * fix ref leak when switching zones (LP: #1979009)
    - net/sched: act_ct: fix ref leak when switching zones

  * Fix XFRM flags validity check (LP: #1978967)
    - SAUCE: net/xfrm: Fix XFRM flags validity check

  [ Ubuntu: 5.4.0-121.137 ]

  * focal/linux: 5.4.0-121.137 -proposed tracker (LP: #1978666)
  * Packaging resync (LP: #1786013)
    - debian/dkms-versions -- update from kernel-versions (main/2022.05.30)
  * CVE-2022-28388
    - can: usb_8dev: usb_8dev_start_xmit(): fix double dev_kfree_skb() in error
      path
  * test_vxlan_under_vrf.sh in net from ubuntu_kernel_selftests failed (Check VM
    connectivity through VXLAN (underlay in the default VRF) [FAIL])
    (LP: #1871015)
    - selftests: net: test_vxlan_under_vrf: fix HV connectivity test
  * [UBUNTU 20.04] CPU-MF: add extended counter set definitions for new IBM z16
    (LP: #1974433)
    - s390/cpumf: add new extended counter set for IBM z16
  * [UBUNTU 20.04] KVM nesting support leaks too much memory, might result in
    stalls during cleanup (LP: #1974017)
    - KVM: s390: vsie/gmap: reduce gmap_rmap overhead
  * [UBUNTU 20.04] Null Pointer issue in nfs code running Ubuntu on IBM Z
    (LP: #1968096)
    - NFS: Fix up nfs_ctx_key_to_expire()

  [ Ubuntu: 5.4.0-120.136 ]

  * CVE-2022-21123 // CVE-2022-21125 // CVE-2022-21166
    - cpu/speculation: Add prototype for cpu_show_srbds()
    - x86/cpu: Add Jasper Lake to Intel family
    - x86/cpu: Add Lakefield, Alder Lake and Rocket Lake models to the to Intel
      CPU family
    - x86/cpu: Add another Alder Lake CPU to the Intel family
    - Documentation: Add documentation for Processor MMIO Stale Data
    - x86/speculation/mmio: Enumerate Processor MMIO Stale Data bug
    - x86/speculation: Add a common function for MD_CLEAR mitigation update
    - x86/speculation/mmio: Add mitigation for Processor MMIO Stale Data
    - x86/bugs: Group MDS, TAA & Processor MMIO Stale Data mitigations
    - x86/speculation/mmio: Enable CPU Fill buffer clearing on idle
    - x86/speculation/mmio: Add sysfs reporting for Processor MMIO Stale Data
    - x86/speculation/srbds: Update SRBDS mitigation selection
    - x86/speculation/mmio: Reuse SRBDS mitigation for SBDS
    - KVM: x86/speculation: Disable Fill buffer clear within guests
    - x86/speculation/mmio: Print SMT warning

 -- Zachary Tahenakos <email address hidden> Tue, 21 Jun 2022 13:59:23 -0400