APPLIED: [SRU][F][PATCH 0/2] Upstream fix for i915_active_acquire crash

[Khaled Elmously]

On 2020-05-13 11:10:47 , Sultan Alsawaf wrote:
> BugLink: https://bugs.launchpad.net/bugs/1868551
> 
> SRU Justification:
> 
> [Impact]
> Users are experiencing a frequent NULL pointer dereference crash in
> i915_active_acquire when using kms, which is used by default.
> 
> [Fix]
> The fix is a cherry pick from upstream which was supposed to be backported to
> 5.4 by upstream, but was neglected. The fix has a subsequent Fixes patch to
> resolve some uninitialized pointer usage.
> 
> [Test]
> Verified by multiple bug reporters.
> 
> [Regression Potential]
> Low. Although there are a lot of lines added, they're mostly boilerplate, and
> this patch is confirmed by multiple users to fix a crash.
> 
> Chris Wilson (1):
>   drm/i915: Hold reference to intel_frontbuffer as we track activity
> 
> Colin Ian King (1):
>   drm/i915: fix uninitialized pointer reads on pointers to and from
> 
>  drivers/gpu/drm/i915/display/intel_display.c  |  2 +-
>  .../gpu/drm/i915/display/intel_frontbuffer.c  | 16 ++++-----
>  .../gpu/drm/i915/display/intel_frontbuffer.h  | 34 +++++++++++++++++--
>  drivers/gpu/drm/i915/display/intel_overlay.c  | 17 +++++++---
>  drivers/gpu/drm/i915/gem/i915_gem_clflush.c   |  3 +-
>  drivers/gpu/drm/i915/gem/i915_gem_domain.c    |  4 +--
>  drivers/gpu/drm/i915/gem/i915_gem_object.c    | 26 +++++++++++++-
>  drivers/gpu/drm/i915/gem/i915_gem_object.h    | 23 ++++++++++++-
>  .../gpu/drm/i915/gem/i915_gem_object_types.h  |  2 +-
>  drivers/gpu/drm/i915/i915_gem.c               | 10 +++---
>  drivers/gpu/drm/i915/i915_vma.c               | 14 +++++---
>  11 files changed, 118 insertions(+), 33 deletions(-)
> 
> -- 
> 2.20.1
> 
> 
> -- 
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