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


It looks like you already submitted an SRU request, so please ignore
comment #4.  And it looks like apw has performed the backport for #5.

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   drm/fbdev: Return -EBUSY when oopsing

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

Bug description:
  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.

  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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