Xenial update to v4.4.23 stable release

[Tim Gardner]

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 v4.4.23 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 v4.4.23 stable release shall be applied:

include/linux/kernel.h: change abs() macro so it uses consistent return type
Fix build warning in kernel/cpuset.c
reiserfs: fix "new_insert_key may be used uninitialized ..."
ipv4: panic in leaf_walk_rcu due to stale node pointer
ipv6: release dst in ping_v6_sendmsg
tcp: cwnd does not increase in TCP YeAH
tcp: properly scale window in tcp_v[46]_reqsk_send_ack()
crypto: arm64/aes-ctr - fix NULL dereference in tail processing
crypto: arm/aes-ctr - fix NULL dereference in tail processing
crypto: skcipher - Fix blkcipher walk OOM crash
crypto: echainiv - Replace chaining with multiplication
ocfs2/dlm: fix race between convert and migration
ocfs2: fix start offset to ocfs2_zero_range_for_truncate()
kbuild: Do not run modules_install and install in paralel
Makefile: revert "Makefile: Document ability to make file.lst and file.S" partially
tools: Support relative directory path for 'O='
kbuild: forbid kernel directory to contain spaces and colons
Kbuild: disable 'maybe-uninitialized' warning for CONFIG_PROFILE_ALL_BRANCHES
gcov: disable -Wmaybe-uninitialized warning
Disable "maybe-uninitialized" warning globally
Disable "frame-address" warning
Makefile: Mute warning for __builtin_return_address(>0) for tracing only
net: caif: fix misleading indentation
Add braces to avoid "ambiguous ‘else’" compiler warnings
am437x-vfpe: fix typo in vpfe_get_app_input_index
ath9k: fix misleading indentation
iwlegacy: avoid warning about missing braces
Staging: iio: adc: fix indent on break statement
nouveau: fix nv40_perfctr_next() cleanup regression
bonding: Fix bonding crash
Revert "af_unix: Fix splice-bind deadlock"
af_unix: split 'u->readlock' into two: 'iolock' and 'bindlock'
vti: flush x-netns xfrm cache when vti interface is removed
net/irda: handle iriap_register_lsap() allocation failure
tipc: fix NULL pointer dereference in shutdown()
net/mlx5: Added missing check of msg length in verifying its signature
net: dsa: bcm_sf2: Fix race condition while unmasking interrupts
Revert "phy: IRQ cannot be shared"
net: smc91x: fix SMC accesses
bridge: re-introduce 'fix parsing of MLDv2 reports'
autofs races
autofs: use dentry flags to block walks during expire
xfs: prevent dropping ioend completions during buftarg wait
fsnotify: add a way to stop queueing events on group shutdown
fanotify: fix list corruption in fanotify_get_response()
fix fault_in_multipages_...() on architectures with no-op access_ok()
mtd: maps: sa1100-flash: potential NULL dereference
mtd: pmcmsp-flash: Allocating too much in init_msp_flash()
power: reset: hisi-reboot: Unmap region obtained by of_iomap
fix memory leaks in tracing_buffers_splice_read()
tracing: Move mutex to protect against resetting of seq data
mm: delete unnecessary and unsafe init_tlb_ubc()
can: flexcan: fix resume function
nl80211: validate number of probe response CSA counters
btrfs: ensure that file descriptor used with subvol ioctls is a dir
i2c-eg20t: fix race between i2c init and interrupt enable
i2c: qup: skip qup_i2c_suspend if the device is already runtime suspended
MIPS: Fix pre-r6 emulation FPU initialisation
MIPS: SMP: Fix possibility of deadlock when bringing CPUs online
MIPS: vDSO: Fix Malta EVA mapping to vDSO page structs
MIPS: Remove compact branch policy Kconfig entries
MIPS: Avoid a BUG warning during prctl(PR_SET_FP_MODE, ...)
MIPS: Add a missing ".set pop" in an early commit
MIPS: paravirt: Fix undefined reference to smp_bootstrap
PM / hibernate: Restore processor state before using per-CPU variables
PM / hibernate: Fix rtree_next_node() to avoid walking off list ends
power_supply: tps65217-charger: fix missing platform_set_drvdata()
power: supply: max17042_battery: fix model download bug.
qxl: check for kmap failures
hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()
Linux 4.4.23

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-47.68

---------------
linux (4.4.0-47.68) xenial; urgency=low

  [ Kamal Mostafa ]

  * Release Tracking Bug
    - LP: #1636941

  * Add a driver for Amazon Elastic Network Adapters (ENA) (LP: #1635721)
    - lib/bitmap.c: conversion routines to/from u32 array
    - net: ethtool: add new ETHTOOL_xLINKSETTINGS API
    - net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)
    - [config] enable CONFIG_ENA_ETHERNET=m (Amazon ENA driver)

  * unexpectedly large memory usage of mounted snaps (LP: #1636847)
    - [Config] switch squashfs to single threaded decode

 -- Kamal Mostafa <email address hidden> Wed, 26 Oct 2016 10:47:55 -0700