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[Launchpad Bug Tracker <1577748@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.19.0-61.69

---------------
linux (3.19.0-61.69) vivid; urgency=low

  [ Kamal Mostafa ]

  * CVE-2016-1583 (LP: #1588871)
    - ecryptfs: fix handling of directory opening
    - SAUCE: proc: prevent stacking filesystems on top
    - SAUCE: ecryptfs: forbid opening files without mmap handler
    - SAUCE: sched: panic on corrupted stack end

 -- Andy Whitcroft <apw@xxxxxxxxxxxxx>  Wed, 08 Jun 2016 22:25:58 +0100

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

** CVE added: http://www.cve.mitre.org/cgi-
bin/cvename.cgi?name=2016-1583

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

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https://bugs.launchpad.net/bugs/1577748

Title:
  OOPS on wily+ for Haswell-ULT and Broadwell

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Vivid:
  Fix Released
Status in linux source package in Wily:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  After upgrading to the wily 4.2 kernel, we see early OOPSes similar to
  the following on Haswell-ULT and Broadwell processors:

  ------------[ cut here ]------------
  WARNING: CPU: 1 PID: 1 at /build/linux-lts-wily-MVxxD8/linux-lts-wily-4.2.0/arch/x86/mm/ioremap.c:198 __ioremap_caller+0x2a2/0x360()
  Info: mapping multiple BARs. Your kernel is fine.
  Modules linked in:
  CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.2.0-34-generic #39~14.04.1-Ubuntu
  Hardware name: Hewlett-Packard HP EliteBook Folio 1040 G1/213E, BIOS L83 Ver. 01.07 03/28/2014
   ffffffff81a91c80 ffff88023522bad8 ffffffff817b5fed 0000000000000001
   ffff88023522bb28 ffff88023522bb18 ffffffff8107799a ffffc90000cbe000
   ffffc90000cb8000 ffffc90000cb8000 0000000000006000 ffff880230297040
  Call Trace:
   [<ffffffff817b5fed>] dump_stack+0x45/0x57
   [<ffffffff8107799a>] warn_slowpath_common+0x8a/0xc0
   [<ffffffff81077a16>] warn_slowpath_fmt+0x46/0x50
   [<ffffffff81064942>] __ioremap_caller+0x2a2/0x360
   [<ffffffff81064a17>] ioremap_nocache+0x17/0x20
   [<ffffffff810393c5>] snb_uncore_imc_init_box+0x65/0x90
   [<ffffffff81037955>] uncore_pci_probe+0xd5/0x1c0
   [<ffffffff813f3a75>] local_pci_probe+0x45/0xa0
   [<ffffffff813f4c34>] ? pci_match_device+0xf4/0x120
   [<ffffffff813f4d6a>] pci_device_probe+0xca/0x110
   [<ffffffff814f6293>] driver_probe_device+0x213/0x460
   [<ffffffff814f6570>] __driver_attach+0x90/0xa0
   [<ffffffff814f64e0>] ? driver_probe_device+0x460/0x460
   [<ffffffff814f409d>] bus_for_each_dev+0x5d/0x90
   [<ffffffff814f5c0e>] driver_attach+0x1e/0x20
   [<ffffffff814f5760>] bus_add_driver+0x1d0/0x290
   [<ffffffff81d606cf>] ? uncore_cpu_setup+0x12/0x12
   [<ffffffff814f6f30>] driver_register+0x60/0xe0
   [<ffffffff813f33dc>] __pci_register_driver+0x4c/0x50
   [<ffffffff81d607b5>] intel_uncore_init+0xe6/0x2fc
   [<ffffffff81d606cf>] ? uncore_cpu_setup+0x12/0x12
   [<ffffffff8100213d>] do_one_initcall+0xcd/0x1f0
   [<ffffffff81094e00>] ? parse_args+0x120/0x470
   [<ffffffff810b7528>] ? __wake_up+0x48/0x60
   [<ffffffff81d512c5>] kernel_init_freeable+0x199/0x226
   [<ffffffff81d509a1>] ? initcall_blacklist+0xc0/0xc0
   [<ffffffff817a5f50>] ? rest_init+0x80/0x80
   [<ffffffff817a5f5e>] kernel_init+0xe/0xe0
   [<ffffffff817bd81f>] ret_from_fork+0x3f/0x70
   [<ffffffff817a5f50>] ? rest_init+0x80/0x80
  ---[ end trace 5f5beae5b9d2dc45 ]---

  the issue is fixed in upstream kernels, via two patches:

  https://lkml.org/lkml/2015/12/11/165
  http://lkml.iu.edu/hypermail/linux/kernel/1601.3/03815.html

  each is a one-liner against the mch_quirk_devices[] structure.

  [nlb-glaptop](0) $ cat /proc/version_signature 
  Ubuntu 4.2.0-35.40~14.04.1-generic 4.2.8-ckt5
  [nlb-glaptop](0) $ 

  [nlb-glaptop](0) $ lsb_release -rd
  Description:	Ubuntu 14.04 LTS
  Release:	14.04
  [nlb-glaptop](0) $ 

  [nlb-glaptop](0) $ apt-cache policy linux-generic-lts-wily
  linux-generic-lts-wily:
    Installed: 4.2.0.35.28
    Candidate: 4.2.0.35.28
    Version table:
   *** 4.2.0.35.28 0
          600 https://rapture-prod.corp.google.com/ goobuntu-trusty-testing-laptop@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/main amd64 Packages
          100 /var/lib/dpkg/status
  [nlb-glaptop](0) $

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