From 4da057e50c23628dc647b23adeae8f81b04459b5 Mon Sep 17 00:00:00 2001
From: Sven Eckelmann <sven@narfation.org>
Date: Thu, 20 Aug 2015 18:11:33 +0200
Subject: [PATCH] batman-adv: TEST if batadv_frag_clear_chain is valid

---
 net/batman-adv/fragmentation.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/batman-adv/fragmentation.c b/net/batman-adv/fragmentation.c
index 700c96c82a15..701a1cfb9dd7 100644
--- a/net/batman-adv/fragmentation.c
+++ b/net/batman-adv/fragmentation.c
@@ -19,6 +19,7 @@
 #include "main.h"
 
 #include <linux/atomic.h>
+#include <linux/bug.h>
 #include <linux/byteorder/generic.h>
 #include <linux/etherdevice.h>
 #include <linux/fs.h>
@@ -52,6 +53,7 @@ static void batadv_frag_clear_chain(struct hlist_head *head)
 	struct hlist_node *node;
 
 	hlist_for_each_entry_safe(entry, node, head, list) {
+		BUG_ON(entry->list.pprev != &head->first);
 		hlist_del(&entry->list);
 		kfree_skb(entry->skb);
 		kfree(entry);
-- 
2.5.0