Commit d67f1b6d authored Jun 02, 2019 by Brian Masney Committed by Rob Clark Jun 18, 2019

drm/msm: correct attempted NULL pointer dereference in put_iova



put_iova() would attempt to dereference a NULL pointer via the
address space pointer when no IOMMU is present. Correct this by adding
the appropriate check.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

parent 61f04797

drivers/gpu/drm/msm/msm_gem.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -352,8 +352,10 @@ put_iova(struct drm_gem_object *obj)
		WARN_ON(!mutex_is_locked(&msm_obj->lock));

		list_for_each_entry_safe(vma, tmp, &msm_obj->vmas, list) {
		if (vma->aspace) {
		msm_gem_purge_vma(vma->aspace, vma);
		msm_gem_close_vma(vma->aspace, vma);
		}
		del_vma(vma);
		}
		}