[PATCH 2/3] SELinux: add security_task_setmempolicy hooks to mm code

[James Morris <jmorris@namei.org>]

From: David Quigley <dpquigl@tycho.nsa.gov>

This patch inserts the security hook calls into the setmempolicy function 
to enable security modules to mediate this operation between tasks.

This patch is aimed at 2.6.18 inclusion.

Please apply.

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>

---

 mempolicy.c |    5 +++++
 migrate.c   |    6 ++++++
 2 files changed, 11 insertions(+)

diff -purN -X dontdiff linux-2.6.17-mm1.p/mm/mempolicy.c linux-2.6.17-mm1.w/mm/mempolicy.c
--- linux-2.6.17-mm1.p/mm/mempolicy.c	2006-06-21 13:09:22.000000000 -0400
+++ linux-2.6.17-mm1.w/mm/mempolicy.c	2006-06-21 13:10:09.000000000 -0400
@@ -88,6 +88,7 @@
 #include <linux/proc_fs.h>
 #include <linux/migrate.h>
 #include <linux/rmap.h>
+#include <linux/security.h>
 
 #include <asm/tlbflush.h>
 #include <asm/uaccess.h>
@@ -946,6 +947,10 @@ asmlinkage long sys_migrate_pages(pid_t 
 		goto out;
 	}
 
+	err = security_task_setmempolicy(task);
+	if (err)
+		goto out;
+
 	err = do_migrate_pages(mm, &old, &new,
 		capable(CAP_SYS_NICE) ? MPOL_MF_MOVE_ALL : MPOL_MF_MOVE);
 out:
diff -purN -X dontdiff linux-2.6.17-mm1.p/mm/migrate.c linux-2.6.17-mm1.w/mm/migrate.c
--- linux-2.6.17-mm1.p/mm/migrate.c	2006-06-21 13:09:22.000000000 -0400
+++ linux-2.6.17-mm1.w/mm/migrate.c	2006-06-21 13:10:09.000000000 -0400
@@ -27,6 +27,7 @@
 #include <linux/writeback.h>
 #include <linux/mempolicy.h>
 #include <linux/vmalloc.h>
+#include <linux/security.h>
 
 #include "internal.h"
 
@@ -903,6 +904,11 @@ asmlinkage long sys_move_pages(pid_t pid
 		goto out2;
 	}
 
+ 	err = security_task_setmempolicy(task);
+ 	if (err)
+ 		goto out2;
+ 	
+
 	task_nodes = cpuset_mems_allowed(task);
 
 	/* Limit nr_pages so that the multiplication may not overflow */
-
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