kernel-packages team mailing list archive

[Stefan Bader <stefan.bader@xxxxxxxxxxxxx>]

** Summary changed:

- DomU crach on xen <3.2 due to NMI call
+ DomU crash on xen <3.2 due to NMI call

** Also affects: linux (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Description changed:

  Request from Amazon:
  
  Our engineering team has reported that the kernel in 14.04 LTS is making
  a call to NMI which in turn causes DomU instances to crash under Xen
  <3.2. This affects only a particular range of kernel versions from
  3.12.25 to 3.15.6, and the kernel in 14.04 seems to be 3.14.x. There is
  already a patch in the mainstream kernel version to apply that would
  address the situation. The probability of a DomU crash with the current
  ubuntu 14.04 kernel on a Dom0 running Xen <3.2 is always. Our customers
  sometimes run on instance types that route them to >3.2 Xen so this does
  not impact all customers.
+ 
+ break-fix: 6efa20e49b9cb1db1ab66870cc37323474a75a13
+ ea9f9274bf4337ba7cbab241c780487651642d63

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

** Changed in: linux (Ubuntu Trusty)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Trusty)
       Status: New => In Progress

** Changed in: linux (Ubuntu Trusty)
     Assignee: (unassigned) => Stefan Bader (smb)

** Tags added: kernel-bug-break-fix

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https://bugs.launchpad.net/bugs/1350375

Title:
  DomU crash on xen <3.2 due to NMI call

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Trusty:
  In Progress

Bug description:
  Request from Amazon:

  Our engineering team has reported that the kernel in 14.04 LTS is
  making a call to NMI which in turn causes DomU instances to crash
  under Xen <3.2. This affects only a particular range of kernel
  versions from 3.12.25 to 3.15.6, and the kernel in 14.04 seems to be
  3.14.x. There is already a patch in the mainstream kernel version to
  apply that would address the situation. The probability of a DomU
  crash with the current ubuntu 14.04 kernel on a Dom0 running Xen <3.2
  is always. Our customers sometimes run on instance types that route
  them to >3.2 Xen so this does not impact all customers.

  break-fix: 6efa20e49b9cb1db1ab66870cc37323474a75a13
  ea9f9274bf4337ba7cbab241c780487651642d63

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