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Message #148646
[Bug 1520427] Re: drm/fbdev: Return -EBUSY when oopsing
I built a test kernel with a cherry pick of commit c50bfd08. The test
kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1520427/
Can you test this kernel and see if it resolves this bug?
Thanks in advance!
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https://bugs.launchpad.net/bugs/1520427
Title:
drm/fbdev: Return -EBUSY when oopsing
Status in linux package in Ubuntu:
Confirmed
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:
Confirmed
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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References