tree 958736377d5e39adaf64b37805479eecf94166fb
parent 4555a71526ce067113ebdadba11f87b44d51fdd0
author Min Li <lm0963hack@gmail.com> 1685106091 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1687940061 +0200

drm/exynos: fix race condition UAF in exynos_g2d_exec_ioctl

[ Upstream commit 48bfd02569f5db49cc033f259e66d57aa6efc9a3 ]

If it is async, runqueue_node is freed in g2d_runqueue_worker on another
worker thread. So in extreme cases, if g2d_runqueue_worker runs first, and
then executes the following if statement, there will be use-after-free.

Signed-off-by: Min Li <lm0963hack@gmail.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>