1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 1fe02e0e801c..8a82c61d83df 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4113,9 +4113,9 @@ long sched_setaffinity(pid_t pid, const struct cpumask *in_mask)
         rcu_read_lock();
 
         p = find_process_by_pid(pid);
-        if (!p) {
+        if (!p || is_realtime(p)) {
                 rcu_read_unlock();
-                return -ESRCH;
+                return p ? -EPERM : -ESRCH;
         }
 
         /* Prevent p going away */