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[Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1675789

Title:
  Xenial update to v4.4.56 stable release

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Fix Released

Bug description:
  SRU Justification

      Impact:
         The upstream process for stable tree updates is quite similar
         in scope to the Ubuntu SRU process, e.g., each patch has to
         demonstrably fix a bug, and each patch is vetted by upstream
         by originating either directly from a mainline/stable Linux tree or
         a minimally backported form of that patch. The v4.4.56 upstream stable
         patch set is now available. It should be included in the Ubuntu
         kernel as well.

         git://git.kernel.org/

      TEST CASE: TBD

         The following patches from the v4.4.56 stable release shall be
  applied:

  netlink: remove mmapped netlink support
  UBUNTU: [Config] CONFIG_NETLINK_MMAP disappeared
  vxlan: correctly validate VXLAN ID against VXLAN_N_VID
  vti6: return GRE_KEY for vti6
  ipv4: mask tos for input route
  l2tp: avoid use-after-free caused by l2tp_ip_backlog_recv
  net: don't call strlen() on the user buffer in packet_bind_spkt()
  net: net_enable_timestamp() can be called from irq contexts
  dccp: Unlock sock before calling sk_free()
  tcp: fix various issues for sockets morphing to listen state
  net: fix socket refcounting in skb_complete_wifi_ack()
  net: fix socket refcounting in skb_complete_tx_timestamp()
  dccp: fix use-after-free in dccp_feat_activate_values
  vrf: Fix use-after-free in vrf_xmit
  uapi: fix linux/packet_diag.h userspace compilation error
  act_connmark: avoid crashing on malformed nlattrs with null parms
  mpls: Send route delete notifications when router module is unloaded
  ipv6: make ECMP route replacement less greedy
  ipv6: avoid write to a possibly cloned skb
  bridge: drop netfilter fake rtable unconditionally
  dccp/tcp: fix routing redirect race
  dccp: fix memory leak during tear-down of unsuccessful connection request
  net sched actions: decrement module reference count after table flush.
  fscrypt: fix renaming and linking special files
  fscrypto: lock inode while setting encryption policy
  x86/kasan: Fix boot with KASAN=y and PROFILE_ANNOTATED_BRANCHES=y
  x86/perf: Fix CR4.PCE propagation to use active_mm instead of mm
  futex: Fix potential use-after-free in FUTEX_REQUEUE_PI
  futex: Add missing error handling to FUTEX_REQUEUE_PI
  Linux 4.4.56

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