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[Bug 1366120] [NEW] [Hyper-V] reloading LIS Hyper-V modules can result in a kernel panic on Ubuntu 14.10

 

Public bug reported:

Reloading the Hyper-V LIS modules can sometime result in a kernel panic. 
Technical details: a hypercall can return “invalid alignment”  error if the input parameter spans a page boundary. Updated LIS code handles properly the error without returning bug().

We've triaged this issue internally and the following 2 patches have been created.
Please include them in 14.10 (Utopic Unicorn)  daily builds and let us know when we can test.

https://lkml.org/lkml/2014/8/27/725
https://lkml.org/lkml/2014/8/28/649

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


** Tags: hyperv utopic

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https://bugs.launchpad.net/bugs/1366120

Title:
  [Hyper-V] reloading LIS Hyper-V modules can result in a kernel panic
  on Ubuntu 14.10

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Reloading the Hyper-V LIS modules can sometime result in a kernel panic. 
  Technical details: a hypercall can return “invalid alignment”  error if the input parameter spans a page boundary. Updated LIS code handles properly the error without returning bug().

  We've triaged this issue internally and the following 2 patches have been created.
  Please include them in 14.10 (Utopic Unicorn)  daily builds and let us know when we can test.

  https://lkml.org/lkml/2014/8/27/725
  https://lkml.org/lkml/2014/8/28/649

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