[PATCH v22 06/12] fs,security: Add sb_delete hook

[Jann Horn]

On Tue, Oct 27, 2020 at 9:04 PM Mickaël Salaün <mic at digikod.net> wrote:
> The sb_delete security hook is called when shutting down a superblock,
> which may be useful to release kernel objects tied to the superblock's
> lifetime (e.g. inodes).
>
> This new hook is needed by Landlock to release (ephemerally) tagged
> struct inodes.  This comes from the unprivileged nature of Landlock
> described in the next commit.
>
> Cc: Al Viro <viro at zeniv.linux.org.uk>
> Cc: James Morris <jmorris at namei.org>
> Cc: Jann Horn <jannh at google.com>
> Cc: Kees Cook <keescook at chromium.org>
> Cc: Serge E. Hallyn <serge at hallyn.com>
> Signed-off-by: Mickaël Salaün <mic at linux.microsoft.com>

Reviewed-by: Jann Horn <jannh at google.com>