UPSTREAM: seccomp: Remove bogus __user annotations

Buffers that are passed to read_actions_logged() and write_actions_logged()
are in kernel memory; the sysctl core takes care of copying from/to
userspace.

Fixes: 32927393 ("sysctl: pass kernel pointers to ->proc_handler")
Reviewed-by: Tyler Hicks <code@tyhicks.com>
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201120170545.1419332-1-jannh@google.com


(cherry picked from commit fab686eb)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: I378d1eb73ff01928d3255191ed4443cd7b87c720
Bug: 176068146