kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Dave Greve, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11-rc5

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags added: bios-outdated-a16

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

-- 
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https://bugs.launchpad.net/bugs/918312

Title:
  Imprecise instruction pointer for 64bit SIGSEGV

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  The instruction pointer passed to a SIGSEGV handler following a (long int) write
  to a protected memory region appears to be imprecise.  In particular, it appears
  to point to the previous instruction.

  This does not appear to be the case for a similar (int) write.

  I have attached a small test program to illustrate this problem.  Below I have included
  a copy of the output of the test program that illustrates what I am seeing.  Note
  that the offending instruction location is identified to the handler as 0x400ea9
  but the offending instruction lives at 0x400eaa.

  The test program requires the library package "libdisasm0" to compile.

  Start of protected memory : 0x1537000

  Disassembly starting at llabel: 
  0x400ea5 : dec	eax (1)
  0x400ea6 : mov	eax, [ebp-0x38] (3)
  0x400ea9 : dec	eax (1)
  0x400eaa : mov	[eax], 0x0000000D (6)
  0x400eb0 : call	0xFFFFFB13 (5)
  0x400eb5 : mov	edi, 0x00000000 (5)
  0x400eba : call	0xFFFFFA93 (5)
  0x400ebf : nop	 (1)
  0x400ec0 : repz ret	 (2)

  SIGSEGV at address : 0x1537000

  Disassembly starting at offending instruction : 
  pc = 0x400ea9
  0x400ea9 : dec	eax (1)
  0x400eaa : mov	[eax], 0x0000000D (6)
  0x400eb0 : call	0xFFFFFB0F (5)
  0x400eb5 : mov	edi, 0x00000000 (5)
  0x400eba : call	0xFFFFFA8F (5)
  0x400ebf : nop	 (1)
  0x400ec0 : repz ret	 (2)

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: linux-generic 2.6.32.37.43
  Regression: No
  Reproducible: Yes
  ProcVersionSignature: Ubuntu 2.6.32-37.81-generic 2.6.32.49+drm33.21
  Uname: Linux 2.6.32-37-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  dagreve    4377 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf7ffc000 irq 16'
     Mixer name	: 'Analog Devices AD1984A'
     Components	: 'HDA:11d4194a,1028026d,00100400'
     Controls      : 34
     Simple ctrls  : 20
  Date: Wed Jan 18 11:11:26 2012
  HibernationDevice: RESUME=UUID=f389f9ee-5683-4f5b-9a5f-1864f8e45b1f
  InstallationMedia: Ubuntu 10.04.2 LTS "Lucid Lynx" - Release amd64 (20110211.1)
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: Dell Inc. Precision WorkStation T7500
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-37-generic root=UUID=08095835-1692-4b9c-8f85-e9b81988317c ro quiet splash
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, user)
   LANG=en_US.UTF-8
  RelatedPackageVersions: linux-firmware 1.34.7
  RfKill:
   
  SourcePackage: linux
  dmi.bios.date: 10/08/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 06FW8P
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 7
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd10/08/2010:svnDellInc.:pnPrecisionWorkStationT7500:pvr:rvnDellInc.:rn06FW8P:rvrA01:cvnDellInc.:ct7:cvr:
  dmi.product.name: Precision WorkStation T7500
  dmi.sys.vendor: Dell Inc.

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