cred: add missing return error code when set_cred_ucounts() failed

If set_cred_ucounts() failed, we need return the error code.

Fixes: 905ae01 ("Add a reference to ucounts for each cred")
Reported-by: Hulk Robot <[email protected]>
Signed-off-by: Yang Yingliang <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Reviewed-by: Alexey Gladkov <[email protected]>
Signed-off-by: Eric W. Biederman <[email protected]>

Author: Yang Yingliang

kernel/cred.c

@@ -372,7 +372,8 @@ int copy_creds(struct task_struct *p, unsigned long clone_flags)
 		ret = create_user_ns(new);
 		if (ret < 0)
 			goto error_put;
-		if (set_cred_ucounts(new) < 0)
+		ret = set_cred_ucounts(new);
+		if (ret < 0)
 			goto error_put;
 	}