drm/i915: Hold mutex across i915_gem_release

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Inorder to serialise the closing of the file descriptor and its
subsequent release of client requests with i915_gem_free_request(), we
need to hold the struct_mutex in i915_gem_release(). Failing to do so
has the potential to trigger an OOPS, later with a use-after-free.

Testcase: igt/gem_close_race
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70874
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71029
Reported-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Chris Wilson 2013-12-04 14:52:06 +00:00 • committed by Daniel Vetter

parent 5ae68b4132

commit 0d1430a3f4

2 changed files with 2 additions and 2 deletions

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2

drivers/gpu/drm/i915/i915_dma.c

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2

drivers/gpu/drm/i915/i915_gem_context.c

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