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[Bug 1647400] Re: system freeze when swapping to encrypted swap partition

 

This bug was fixed in the package linux - 4.4.0-59.80

---------------
linux (4.4.0-59.80) xenial; urgency=low

  [ John Donnelly ]

  * Release Tracking Bug
    - LP: #1654282

  * [2.1.1] MAAS has nvme0n1 set as boot disk, curtin fails (LP: #1651602)
    - (fix) nvme: only require 1 interrupt vector, not 2+

linux (4.4.0-58.79) xenial; urgency=low

  [ Luis Henriques ]

  * Release Tracking Bug
    - LP: #1651402

  * Support ACPI probe for IIO sensor drivers from ST Micro (LP: #1650123)
    - SAUCE: iio: st_sensors: match sensors using ACPI handle
    - SAUCE: iio: st_accel: Support sensor i2c probe using acpi
    - SAUCE: iio: st_pressure: Support i2c probe using acpi
    - [Config] CONFIG_HTS221=m, CONFIG_HTS221_I2C=m, CONFIG_HTS221_SPI=m

  * Fix channel data parsing in ST Micro sensor IIO drivers (LP: #1650189)
    - SAUCE: iio: common: st_sensors: fix channel data parsing

  * ST Micro lng2dm 3-axis "femto" accelerometer support (LP: #1650112)
    - SAUCE: iio: st-accel: add support for lis2dh12
    - SAUCE: iio: st_sensors: support active-low interrupts
    - SAUCE: iio: accel: Add support for the h3lis331dl accelerometer
    - SAUCE: iio: st_sensors: verify interrupt event to status
    - SAUCE: iio: st_sensors: support open drain mode
    - SAUCE: iio:st_sensors: fix power regulator usage
    - SAUCE: iio: st_sensors: switch to a threaded interrupt
    - SAUCE: iio: accel: st_accel: Add lis3l02dq support
    - SAUCE: iio: st_sensors: fix scale configuration for h3lis331dl
    - SAUCE: iio: accel: st_accel: add support to lng2dm
    - SAUCE: iio: accel: st_accel: inline per-sensor data
    - SAUCE: Documentation: dt: iio: accel: add lng2dm sensor device binding

  * ST Micro hts221 relative humidity sensor support (LP: #1650116)
    - SAUCE: iio: humidity: add support to hts221 rh/temp combo device
    - SAUCE: Documentation: dt: iio: humidity: add hts221 sensor device binding
    - SAUCE: iio: humidity: remove
    - SAUCE: iio: humidity: Support acpi probe for hts211

  * crypto : tolerate new crypto hardware for z Systems (LP: #1644557)
    - s390/zcrypt: Introduce CEX6 toleration

  * Acer, Inc ID 5986:055a is useless after 14.04.2 installed. (LP: #1433906)
    - uvcvideo: uvc_scan_fallback() for webcams with broken chain

  * vmxnet3 driver could causes kernel panic with v4.4 if LRO enabled.
    (LP: #1650635)
    - vmxnet3: segCnt can be 1 for LRO packets

  * system freeze when swapping to encrypted swap partition (LP: #1647400)
    - mm, oom: rework oom detection
    - mm: throttle on IO only when there are too many dirty and writeback pages

  * Kernel Fixes to get TCMU File Backed Optical to work (LP: #1646204)
    - target/user: Use sense_reason_t in tcmu_queue_cmd_ring
    - target/user: Return an error if cmd data size is too large
    - target/user: Fix comments to not refer to data ring
    - SAUCE: (no-up) target/user: Fix use-after-free of tcmu_cmds if they are
      expired

  * CVE-2016-9756
    - KVM: x86: drop error recovery in em_jmp_far and em_ret_far

  * Dell Precision 5520 & 3520 freezes at login screent (LP: #1650054)
    - ACPI / blacklist: add _REV quirks for Dell Precision 5520 and 3520

  * CVE-2016-9794
    - ALSA: pcm : Call kill_fasync() in stream lock

  * Allow fuse user namespace mounts by default in xenial (LP: #1634964)
    - (namespace) mnt: Move the FS_USERNS_MOUNT check into sget_userns
    - (namespace) Revert "UBUNTU: SAUCE: fs: Refuse uid/gid changes which don't
      map into s_user_ns"
    - (namespace) fs: Refuse uid/gid changes which don't map into s_user_ns
    - (namespace) Revert "UBUNTU: SAUCE: fs: Update posix_acl support to handle
      user namespace mounts"
    - (namespace) vfs: Verify acls are valid within superblock's s_user_ns.
    - SAUCE: (namespace) posix_acl: Export posix_acl_fix_xattr_userns() to modules
    - SAUCE: (namespace) fuse: Translate ids in posix acl xattrs
    - (namespace) vfs: Don't modify inodes with a uid or gid unknown to the vfs
    - (namespace) vfs: Don't create inodes with a uid or gid unknown to the vfs
    - (namespace) Revert "UBUNTU: SAUCE: quota: Require that qids passed to
      dqget() be valid and map into s_user_ns"
    - (namespace) Revert "UBUNTU: SAUCE: quota: Convert ids relative to s_user_ns"
    - (namespace) quota: Ensure qids map to the filesystem
    - (namespace) quota: Handle quota data stored in s_user_ns in quota_setxquota
    - (namespace) dquot: For now explicitly don't support filesystems outside of
      init_user_ns
    - (namespace) Revert "UBUNTU: SAUCE: ima/evm: Allow root in s_user_ns to set
      xattrs"
    - SAUCE: (namespace) security/integrity: Harden against malformed xattrs
    - (namespace) Revert "UBUNTU: SAUCE: fs: Allow superblock owner to change
      ownership of inodes with unmappable ids"
    - SAUCE: (namespace) fs: Allow superblock owner to change ownership of inodes
    - (namespace) Revert "UBUNTU: SAUCE: fs: Don't remove suid for CAP_FSETID in
      s_user_ns"
    - SAUCE: (namespace) fs: Don't remove suid for CAP_FSETID for userns root
    - SAUCE: (namespace) fuse: Allow user namespace mounts by default

  * Boot crash in xen_send_IPI_one (LP: #1649821)
    - xen/qspinlock: Don't kick CPU if IRQ is not initialized

  * linux: Staging modules should be unsigned (LP: #1642368)
    - [Debian] Suppress module signing for staging drivers
    - SAUCE: Add rtl drivers to signature inclusion list

  * Ethernet not work after upgrade from kernel 3.19 to 4.4 [10ec:8168]
    (LP: #1648279)
    - ACPI / blacklist: Make Dell Latitude 3350 ethernet work

  * CVE-2016-9793
    - net: avoid signed overflows for SO_{SND|RCV}BUFFORCE

  * [Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10, 15.04, and
    15.10 (LP: #1400319)
    - Drivers: hv: avoid vfree() on crash

  * [Hyper-V] netvsc: fix incorrect receive checksum offloading (LP: #1636656)
    - netvsc: fix incorrect receive checksum offloading

 -- John Donnelly <john.donnelly@xxxxxxxxxxxxx>  Thu, 05 Jan 2017
12:49:16 +0000

** Changed in: linux (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-9756

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-9793

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-9794

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https://bugs.launchpad.net/bugs/1647400

Title:
  system freeze when swapping to encrypted swap partition

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Released

Bug description:
  == Comment: #0 - Bernd-Rainer Bresser <BRESSERB@xxxxxxxxxx> - 2016-12-05 04:27:00 ==
  +++ This bug was initially created as a clone of Bug #147836 +++

  ---Problem Description---
  When the system is installed with encrypted swap partition the attempt to swap ends in a system freeze. No error, no dump, the system needs to be reloaded.
   
  Contact Information = Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG Gao/China/IBM 
   
  ---uname output---
  Linux s38lp65 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:05:09 UTC 2016 s390x s390x s390x GNU/Linux
   
  Machine Type = z13 LPAR 
   
  ---System Hang---
   System is frozen. No error, no dump, the system needs to be reloaded.
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   1. install a system with encrypted swap partition. This can be done using the installer or via manual updates to /etc/fstab and /etc/crypttab.

  2. Verify encrypted swap partition exists
   cryptsetup status kvmibm-swap
  /dev/mapper/kvmibm-swap is active and is in use.
    type:    PLAIN
    cipher:  aes-xts-plain64:sha256
    keysize: 256 bits
    device:  /dev/dasda2
    offset:  0 sectors
    size:    8388672 sectors
    mode:    read/write

  3. force swapping
  this can be done by a command like this (if the system has 8GB memory)
  dd if=/dev/zero of=/dev/null ibs=16k obs=8G count=2MB
   
  Stack trace output:
   no
   
  Oops output:
   no
   
  System Dump Location:
   
   
  *Additional Instructions for Bernd-Rainer Bresser/Germany/IBM, Wen Yi AG Gao/China/IBM: 
  -Attach sysctl -a output output to the bug.

  == Comment: #1 - Bernd-Rainer Bresser <BRESSERB@xxxxxxxxxx> - 2016-12-05 04:33:24 ==
  - the problem was originally found on KVM for IBM z 1.1.3
  - test on Ubuntu 16.04.1 showed the same issue here
  - on KVM for IBM z 1.1.3 the problem could be solved/circumvented by reverting
         commit 564e81a57f9788b1475127012e0fd44e9049e342
        Author: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
        Date:   Fri Feb 5 15:36:30 2016 -0800
              mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make any progress

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