Focal update: v5.4.173 upstream stable release

This bug was fixed in the package linux - 5.4.0-105.119

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linux (5.4.0-105.119) focal; urgency=medium

  * CVE-2022-0847
    - lib/iov_iter: initialize "flags" in new pipe_buffer

  * Broken network on some AWS instances with focal/impish kernels
    (LP: #1961968)
    - SAUCE: Revert "PCI/MSI: Mask MSI-X vectors only on success"

  * [UBUNTU 20.04] kernel: Add support for CPU-MF counter second version 7
    (LP: #1960182)
    - s390/cpumf: Support for CPU Measurement Facility CSVN 7
    - s390/cpumf: Support for CPU Measurement Sampling Facility LS bit

  * Hipersocket page allocation failure on Ubuntu 20.04 based SSC environments
    (LP: #1959529)
    - s390/qeth: use memory reserves to back RX buffers

  * CVE-2022-0516
    - KVM: s390: Return error on SIDA memop on normal guest

  * CVE-2022-0435
    - tipc: improve size validations for received domain records

  * CVE-2022-0492
    - cgroup-v1: Require capabilities to set release_agent

  * Recalled NFSv4 files delegations overwhelm server (LP: #1957986)
    - NFSv4: Fix delegation handling in update_open_stateid()
    - NFSv4: nfs4_callback_getattr() should ignore revoked delegations
    - NFSv4: Delegation recalls should not find revoked delegations
    - NFSv4: fail nfs4_refresh_delegation_stateid() when the delegation was
      revoked
    - NFS: Rename nfs_inode_return_delegation_noreclaim()
    - NFSv4: Don't remove the delegation from the super_list more than once
    - NFSv4: Hold the delegation spinlock when updating the seqid
    - NFSv4: Clear the NFS_DELEGATION_REVOKED flag in
      nfs_update_inplace_delegation()
    - NFSv4: Update the stateid seqid in nfs_revoke_delegation()
    - NFSv4: Revoke the delegation on success in nfs4_delegreturn_done()
    - NFSv4: Ignore requests to return the delegation if it was revoked
    - NFSv4: Don't reclaim delegations that have been returned or revoked
    - NFSv4: nfs4_return_incompatible_delegation() should check delegation
      validity
    - NFSv4: Fix nfs4_inode_make_writeable()
    - NFS: nfs_inode_find_state_and_recover() fix stateid matching
    - NFSv4: Fix races between open and delegreturn
    - NFSv4: Handle NFS4ERR_OLD_STATEID in delegreturn
    - NFSv4: Don't retry the GETATTR on old stateid in nfs4_delegreturn_done()
    - NFSv4: nfs_inode_evict_delegation() should set NFS_DELEGATION_RETURNING
    - NFS: Clear NFS_DELEGATION_RETURN_IF_CLOSED when the delegation is returned
    - NFSv4: Try to return the delegation immediately when marked for return on
      close
    - NFSv4: Add accounting for the number of active delegations held
    - NFSv4: Limit the total number of cached delegations
    - NFSv4: Ensure the delegation is pinned in nfs_do_return_delegation()
    - NFSv4: Ensure the delegation cred is pinned when we call delegreturn

  * Focal update: v5.4.174 upstream stable release (LP: #1960566)
    - HID: uhid: Fix worker destroying device without any protection
    - HID: wacom: Reset expected and received contact counts at the same time
    - HID: wacom: Ignore the confidence flag when a touch is removed
    - HID: wacom: Avoid using stale array indicies to read contact count
    - f2fs: fix to ...

This bug is awaiting verification that the linux-xilinx-zynqmp/5.4.0-1019.22 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!