kernel-packages team mailing list archive

[Giuseppe Mazzotta <giuseppe@xxxxxxxxxx>]

Public bug reported:

Current stable kernel is affected by an issue that happens when
releasing grants. It is a communication issue between dom0 and domU and
there is a temptative patch upstream (konrad's tree) that might fix the
issue:

https://git.kernel.org/cgit/linux/kernel/git/konrad/xen.git/patch/?id=c43cf3ea838541ea9f066f4f1aa7b197cba6276e
(also in attachment)

I have not been able to backport this patch on top of current 3.13.0-48
sources.

When this panic is triggered (on a server for example), there is a
complete dom0 kernel crash (as documented by attachment log) with data &
services loss.

/proc/version_signature: Ubuntu 3.13.0-48.80-generic 3.13.11-ckt16

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: kernel-bug xen

** Attachment added: "xen_crash_xcrpt.log"
   https://bugs.launchpad.net/bugs/1438677/+attachment/4361961/+files/xen_crash_xcrpt.log

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https://bugs.launchpad.net/bugs/1438677

Title:
  dom0 kernel panic - xen_blkbk_unmap+0x5c/0x2f0 [xen_blkback]

Status in linux package in Ubuntu:
  New

Bug description:
  Current stable kernel is affected by an issue that happens when
  releasing grants. It is a communication issue between dom0 and domU
  and there is a temptative patch upstream (konrad's tree) that might
  fix the issue:

  https://git.kernel.org/cgit/linux/kernel/git/konrad/xen.git/patch/?id=c43cf3ea838541ea9f066f4f1aa7b197cba6276e
  (also in attachment)

  I have not been able to backport this patch on top of current
  3.13.0-48 sources.

  When this panic is triggered (on a server for example), there is a
  complete dom0 kernel crash (as documented by attachment log) with data
  & services loss.

  /proc/version_signature: Ubuntu 3.13.0-48.80-generic 3.13.11-ckt16

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