Merge patch series "nsfs: validate ioctls"

Christian Brauner <brauner@kernel.org> says:

This series ensures that nsfs protects against ioctl overloading.

* patches from https://lore.kernel.org/r/20250219-work-nsfs-v1-0-21128d73c5e8@kernel.org:
  selftests/nsfs: add ioctl validation tests
  nsfs: validate ioctls

Link: https://lore.kernel.org/r/20250219-work-nsfs-v1-0-21128d73c5e8@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>