1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/sys.c b/kernel/sys.c
index 9968c5fb55b..bc1dc61c31e 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -163,6 +163,7 @@ SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval)
         if (niceval > 19)
                 niceval = 19;
 
+        rcu_read_lock();
         read_lock(&tasklist_lock);
         switch (which) {
                 case PRIO_PROCESS:
@@ -200,6 +201,7 @@ SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval)
         }
 out_unlock:
         read_unlock(&tasklist_lock);
+        rcu_read_unlock();
 out:
         return error;
 }