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[Launchpad Bug Tracker <1479093@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux - 3.13.0-61.100

---------------
linux (3.13.0-61.100) trusty; urgency=low

  [ Luis Henriques]

  * Re-work previous CVE backports to fix regression
    - LP: #1479093

  [ Upstream Kernel Changes ]

  * Revert "x86/nmi/64: Use DF to avoid userspace RSP confusing nested NMI
    detection"
  * Revert "x86/nmi/64: Reorder nested NMI checks"
  * Revert "x86/nmi/64: Improve nested NMI comments"
  * Revert "x86/nmi/64: Switch stacks on userspace NMI entry"
  * Revert "x86/nmi/64: Remove asm code that saves cr2"
  * Revert "x86/nmi: Enable nested do_nmi handling for 64-bit kernels"
  * Revert "x86/asm/entry/64: Remove pointless jump to irq_return"
  * Revert "x86/asm/entry/64: Remove a redundant jump"
  * Revert "x86/asm/entry/64: Fold the 'test_in_nmi' macro into its only
    user"
  * Revert "x86/asm/entry/64: Always allocate a complete "struct pt_regs"
    on the kernel stack"
  * Revert "x86/asm/64: Open-code register save/restore in
    trace_hardirqs*() thunks"
  * Revert "x86: entry_64.S: fold SAVE_ARGS_IRQ macro into its sole user"
  * Revert "x86: ia32entry.S: fix wrong symbolic constant usage:
    R11->ARGOFFSET"
  * Revert "x86: entry_64.S: delete unused code"
  * Revert "x86, entry: Switch stacks on a paranoid entry from userspace"
  * Revert "x86: Speed up ___preempt_schedule*() by using THUNK helpers"
  * Revert "x86_64, entry: Treat regs->ax the same in fastpath and slowpath
    syscalls"
  * Revert "x86, entry: Only call user_exit if TIF_NOHZ"
  * Revert "x86/debug: Drop several unnecessary CFI annotations"
  * Revert "x86_64, entry: Add missing 'DEFAULT_FRAME 0' entry annotations"
  * x86/asm/entry/64: Fold the 'test_in_nmi' macro into its only user
  * x86/asm/entry/64: Remove a redundant jump
  * x86/nmi: Enable nested do_nmi handling for 64-bit kernels
  * x86/nmi/64: Remove asm code that saves cr2
  * x86/nmi/64: Switch stacks on userspace NMI entry
    - CVE-2015-3290, CVE-2015-5157
  * x86/nmi/64: Improve nested NMI comments
  * x86/nmi/64: Reorder nested NMI checks
  * x86/nmi/64: Use DF to avoid userspace RSP confusing nested NMI
    detection
    - CVE-2015-3291

 -- Luis Henriques <luis.henriques@xxxxxxxxxxxxx>  Wed, 29 Jul 2015
10:58:25 +0100

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

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https://bugs.launchpad.net/bugs/1479093

Title:
  Segfault in ld-2.19.so while starting Steam after upgrade to
  3.13.0-59.98

Status in linux package in Ubuntu:
  Invalid
Status in linux-lts-trusty package in Ubuntu:
  Invalid
Status in linux-lts-utopic package in Ubuntu:
  Invalid
Status in linux-lts-vivid package in Ubuntu:
  Invalid
Status in linux source package in Precise:
  Invalid
Status in linux-lts-trusty source package in Precise:
  Fix Released
Status in linux-lts-utopic source package in Precise:
  Invalid
Status in linux-lts-vivid source package in Precise:
  Invalid
Status in linux source package in Trusty:
  Fix Released
Status in linux-lts-trusty source package in Trusty:
  Invalid
Status in linux-lts-utopic source package in Trusty:
  Invalid
Status in linux-lts-vivid source package in Trusty:
  Invalid
Status in linux source package in Vivid:
  Invalid
Status in linux-lts-trusty source package in Vivid:
  Invalid
Status in linux-lts-utopic source package in Vivid:
  Invalid
Status in linux-lts-vivid source package in Vivid:
  Invalid
Status in linux source package in Wily:
  Invalid
Status in linux-lts-trusty source package in Wily:
  Invalid
Status in linux-lts-utopic source package in Wily:
  Invalid
Status in linux-lts-vivid source package in Wily:
  Invalid

Bug description:
  The previous kernel 3.13.0-58.97 does not show the issue when booting back into it. Currently only noticed on starting Steam but there its is reproducable every time on X230 laptop (Intel graphics). Might be related to Steam using 32bit libraries.
  Attaching some log and dump that steam produces but fails to upload (wherever).

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-59-generic 3.13.0-59.98
  ProcVersionSignature: Ubuntu 3.13.0-59.98-generic 3.13.11-ckt22
  Uname: Linux 3.13.0-59-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  smb        2678 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Jul 28 21:42:17 2015
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=7aacd0c3-12d4-4f50-baf7-e1fd8f871f95
  InstallationDate: Installed on 2013-07-25 (733 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: LENOVO 2324CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-59-generic.efi.signed root=UUID=5d3281d3-0142-4039-bb9b-28653778aca0 ro quiet splash mmc-core.removable=0 nomdmonddf nomdmonisw vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-59-generic N/A
   linux-backports-modules-3.13.0-59-generic  N/A
   linux-firmware                             1.127.14
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-29 (455 days ago)
  dmi.bios.date: 04/30/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET94WW (2.54 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2324CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 Pro DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG2ET94WW(2.54):bd04/30/2013:svnLENOVO:pn2324CTO:pvrThinkPadX230:rvnLENOVO:rn2324CTO:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2324CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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