Quoting Alexandru Chirvasitu (2018-01-05 22:05:18)
> Here we go.
>
> I have
>
> CONFIG_PAGE_POISONING not set
> CONFIG_SLUB_STATS=y
> CONFIG_SLUB_DEBUG not set
> CONFIG_KASAN=y
>
> .config attached along as well for verification, in case I missed
> anything.
>
> Again crashed by an attempt to open a terminal window.
Gotcha,
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index b21322b50419..96cf46a10b4e 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -472,7 +472,7 @@ static void __fence_set_priority(struct dma_fence *fence, int prio)
struct drm_i915_gem_request *rq;
struct intel_engine_cs *engine;
- if (!dma_fence_is_i915(fence))
+ if (dma_fence_is_signaled(fence) || !dma_fence_is_i915(fence))
return;
rq = to_request(fence);
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