[SRU Bionic/Focal/OEM-5.10/OEM-5.14/HWE-5.11/Impish 0/1] CVE-2022-0330

[Thadeu Lima de Souza Cascardo]

[Impact]
A missing GPU TLB flush on i915 may allow userspace to have access to
random memory pages.

[Backport]
Backports for upstream stable series have been provided by author and
adjusted for the respective Ubuntu kernels.

[Potential regression]
i915 users would be impacted.

Tvrtko Ursulin (1):
  drm/i915: Flush TLBs before releasing backing store

 drivers/gpu/drm/i915/i915_drv.h        |  2 +
 drivers/gpu/drm/i915/i915_gem.c        | 84 +++++++++++++++++++++++++-
 drivers/gpu/drm/i915/i915_gem_object.h |  1 +
 drivers/gpu/drm/i915/i915_reg.h        |  6 ++
 drivers/gpu/drm/i915/i915_vma.c        |  4 ++
 5 files changed, 96 insertions(+), 1 deletion(-)

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2.32.0