drm/i915: Avoid use-after-free of ctx in request tracepoints

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trace_i915_gem_request_out may be used after the request is completed,
and so the request may have been retired on another thread, invalidating
the rq->ctx. Avoid dereferencing rq->ctx in the tracepoint by switching
to the fence context id instead, updating all tracepoints to match.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170316204235.27786-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

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Chris Wilson 2017-03-16 20:42:35 +00:00

parent a533b4ba77

commit 60367132a2

1 changed files with 4 additions and 4 deletions

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drivers/gpu/drm/i915/i915_trace.h

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