[PATCH] SELinux: add task_movememory hook

This patch adds new security hook, task_movememory, to be called when memory
owened by a task is to be moved (e.g.  when migrating pages to a this hook is
identical to the setscheduler implementation, but a separate hook introduced
to allow this check to be specialized in the future if necessary.

Since the last posting, the hook has been renamed following feedback from
Christoph Lameter.

Signed-off-by: David Quigley <dpquigl@tycho.nsa.gov>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@muc.de>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/security/dummy.c b/security/dummy.c
index 879a98523b1b..c3c5493581e2 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -537,6 +537,11 @@ static int dummy_task_getscheduler (struct task_struct *p)
         return 0;
 }
 
+static int dummy_task_movememory (struct task_struct *p)
+{
+        return 0;
+}
+
 static int dummy_task_wait (struct task_struct *p)
 {
         return 0;
@@ -981,6 +986,7 @@ void security_fixup_ops (struct security_operations *ops)
         set_to_dummy_if_null(ops, task_setrlimit);
         set_to_dummy_if_null(ops, task_setscheduler);
         set_to_dummy_if_null(ops, task_getscheduler);
+        set_to_dummy_if_null(ops, task_movememory);
         set_to_dummy_if_null(ops, task_wait);
         set_to_dummy_if_null(ops, task_kill);
         set_to_dummy_if_null(ops, task_prctl);