| Message ID | 20190603010131.16773-1-masneyb@onstation.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/msm: correct attempted NULL pointer dereference in put_iova | expand |
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c index 35f55dd25994..d31d9f927887 100644 --- a/drivers/gpu/drm/msm/msm_gem.c +++ b/drivers/gpu/drm/msm/msm_gem.c @@ -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) { - msm_gem_purge_vma(vma->aspace, vma); - msm_gem_close_vma(vma->aspace, vma); + if (vma->aspace) { + msm_gem_purge_vma(vma->aspace, vma); + msm_gem_close_vma(vma->aspace, vma); + } del_vma(vma); } }
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> --- drivers/gpu/drm/msm/msm_gem.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)