From 89f1fb57952ba45f5f76b586a7c4b31cdea1a280 Mon Sep 17 00:00:00 2001
From: Thomas Schoebel-Theuer <mars@asus>
Date: Sat, 28 May 2022 09:58:46 +0200
Subject: [PATCH] brick: thighten callback checking

---
 kernel/brick.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/brick.h b/kernel/brick.h
index 9ca1b51f..105f40be 100644
--- a/kernel/brick.h
+++ b/kernel/brick.h
@@ -235,6 +235,7 @@ struct callback_object {
 		CHECK_PTR(obj, done);					\
 		__cb = (obj)->object_cb;				\
 		CHECK_PTR_NULL(__cb, done);				\
+		CHECK_PTR_NULL(__cb->cb_fn, done);			\
 		__cb->cb_error = (err);					\
 		__cb->cb_fn(__cb);					\
 	}