Xenial update: v4.4.243 upstream stable release

This bug was fixed in the package linux - 4.4.0-198.230

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linux (4.4.0-198.230) xenial; urgency=medium

  * xenial/linux: 4.4.0-198.230 -proposed tracker (LP: #1906052)

  * Xenial update: v4.4.244 upstream stable release (LP: #1904914)
    - ring-buffer: Fix recursion protection transitions between interrupt context
    - gfs2: Wake up when sd_glock_disposal becomes zero
    - mm: mempolicy: fix potential pte_unmap_unlock pte error
    - time: Prevent undefined behaviour in timespec64_to_ns()
    - btrfs: reschedule when cloning lots of extents
    - net: xfrm: fix a race condition during allocing spi
    - perf tools: Add missing swap for ino_generation
    - ALSA: hda: prevent undefined shift in snd_hdac_ext_bus_get_link()
    - can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ
      context
    - can: dev: __can_get_echo_skb(): fix real payload length return value for RTR
      frames
    - can: can_create_echo_skb(): fix echo skb generation: always use skb_clone()
    - can: peak_usb: add range checking in decode operations
    - can: peak_usb: peak_usb_get_ts_time(): fix timestamp wrapping
    - Btrfs: fix missing error return if writeback for extent buffer never started
    - i40e: Wrong truncation from u16 to u8
    - i40e: Fix of memory leak and integer truncation in i40e_virtchnl.c
    - ath9k_htc: Use appropriate rs_datalen type
    - usb: gadget: goku_udc: fix potential crashes in probe
    - gfs2: Free rd_bits later in gfs2_clear_rgrpd to fix use-after-free
    - gfs2: check for live vs. read-only file system in gfs2_fitrim
    - drm/amdgpu: perform srbm soft reset always on SDMA resume
    - mac80211: fix use of skb payload instead of header
    - cfg80211: regulatory: Fix inconsistent format argument
    - iommu/amd: Increase interrupt remapping table limit to 512 entries
    - xfs: fix a missing unlock on error in xfs_fs_map_blocks
    - of/address: Fix of_node memory leak in of_dma_is_coherent
    - cosa: Add missing kfree in error path of cosa_write
    - perf: Fix get_recursion_context()
    - ext4: correctly report "not supported" for {usr,grp}jquota when
      !CONFIG_QUOTA
    - ext4: unlock xattr_sem properly in ext4_inline_data_truncate()
    - usb: cdc-acm: Add DISABLE_ECHO for Renesas USB Download mode
    - mei: protect mei_cl_mtu from null dereference
    - ocfs2: initialize ip_next_orphan
    - don't dump the threads that had been already exiting when zapped.
    - drm/gma500: Fix out-of-bounds access to struct drm_device.vblank[]
    - pinctrl: amd: use higher precision for 512 RtcClk
    - pinctrl: amd: fix incorrect way to disable debounce filter
    - swiotlb: fix "x86: Don't panic if can not alloc buffer for swiotlb"
    - IPv6: Set SIT tunnel hard_header_len to zero
    - net/af_iucv: fix null pointer dereference on shutdown
    - net/x25: Fix null-ptr-deref in x25_connect
    - net: Update window_clamp if SOCK_RCVBUF is set
    - random32: make prandom_u32() output unpredictable
    - x86/speculation: Allow IBPB to be conditionally enabled on CPUs with always-
      on STIBP
    - xen/events: avoid removing an event channel while handling it
    - xen/events: add a proper ...