** Information type changed from Private Security to Public Security

** Description changed:

  Quan Luo and ycq from Codesafe Team of Legendsec at Qi'anxin Group
  reported a use-after-free issue in the i915 driver. This issue has been
  fixed in the upstream kernel starting in v5.2 with the following commit:
  The flaw was introduced in v4.14 with this change:
  The problem can be fixed by expanding the usage of struct_mutex to
- include the GEM context lookup.
+ include the GEM context lookup. A fix has been submitted to the upstream
+ stable list:
  [Test Case]
  Enable KASAN and exercise the affected code path using the PoC provided
  by Quan Luo.
  [Regression Potential]
  Low. This approach was suggested by upstream and has been well tested.

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  use-after-free in i915_ppgtt_close

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