866bb22d6b
There is a race where the BO refcount might drop to 0 before the dmabuf/name import paths had a chance to grab a reference for a BO found in the handle_table. The easiest solution is to keep the refcount stable as long as the table_lock is held. While a more involved scheme of rechecking the refcount before actually destroying the BO might also work, the bo_del path isn't called very often, so micro-optimizing a single mutex_lock seems to be over-engineered, so go for the easy solution. Cc: <mesa-stable@lists.freedesktop.org> Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7367> |
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