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authorJeremy Fitzhardinge <jeremy@goop.org>2008-08-03 09:33:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-04 17:16:20 -0700
commit725aad24c3ba96a7c06448c14c265a466cdbd663 (patch)
treebbe0eae923736950030751651f70f3ace4cc7693
parent5941de8eadc287f3f47b87ce9888734ee07d210b (diff)
__sched_setscheduler: don't do any policy checks when not "user"
The "user" parameter to __sched_setscheduler indicates whether the change is being done on behalf of a user process or not. If not, we shouldn't apply any permissions checks, so don't call security_task_setscheduler(). Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org> Tested-by: Steve Wise <swise@opengridcomputing.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--kernel/sched.c22
1 files changed, 12 insertions, 10 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 21f7da94662..04160d277e7 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5004,19 +5004,21 @@ recheck:
return -EPERM;
}
+ if (user) {
#ifdef CONFIG_RT_GROUP_SCHED
- /*
- * Do not allow realtime tasks into groups that have no runtime
- * assigned.
- */
- if (user
- && rt_policy(policy) && task_group(p)->rt_bandwidth.rt_runtime == 0)
- return -EPERM;
+ /*
+ * Do not allow realtime tasks into groups that have no runtime
+ * assigned.
+ */
+ if (rt_policy(policy) && task_group(p)->rt_bandwidth.rt_runtime == 0)
+ return -EPERM;
#endif
- retval = security_task_setscheduler(p, policy, param);
- if (retval)
- return retval;
+ retval = security_task_setscheduler(p, policy, param);
+ if (retval)
+ return retval;
+ }
+
/*
* make sure no PI-waiters arrive (or leave) while we are
* changing the priority of the task: