diff --git a/kernel/fork.c b/kernel/fork.c
index ccdfbb16c86d..46060cb24af0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1569,7 +1569,7 @@ asmlinkage long sys_unshare(unsigned long unshare_flags)
 
 		if (new_sigh) {
 			sigh = current->sighand;
-			current->sighand = new_sigh;
+			rcu_assign_pointer(current->sighand, new_sigh);
 			new_sigh = sigh;
 		}