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[Bug 1520427] Re: drm/fbdev: Return -EBUSY when oopsing

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From: Andy Whitcroft <apw@xxxxxxxxxxxxx>
Date: Tue, 02 Feb 2016 11:48:54 -0000
Reply-to: Bug 1520427 <1520427@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Fix released in 4.2.0-27.32

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

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https://bugs.launchpad.net/bugs/1520427

Title:
   drm/fbdev: Return -EBUSY when oopsing

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Vivid:
  Fix Released
Status in linux source package in Wily:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Issue: 
  Between upstream kernel v3.19 to v4.2,when Intel SMEP/SMAP protection was triggered by some wild function call or data access,  the screen would be frozen and never come back,but the system does not hang.

  Generally, an SMEP/SMAP violation should cause the involved process
  killed, an oops from page fault exception generated to the syslog, and
  the system survived.

  Fix:
  One patch from 4.3 kernel fix this issue
  commit c50bfd08d60cefbe1714c4a53b1c325982858549
  Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
  Date:   Tue Jul 28 13:18:40 2015 +0200

      drm/fbdev: Return -EBUSY when oopsing

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