drm/panfrost: Fix shrinker list corruption by madvise IOCTL
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.56 by commit 1807d8867402a58b831a7fc16832747ff559a0d1, it was introduced in version v5.4 by commit 013b6510131568ce4e01856d5360bfdfe9c3632f. For more details please see the references link.