text ematch: check for NULL pointer before destroying textsearch config

While validating the configuration em_ops is already set, thus the individual destroy functions are called, but the ematch data has not been allocated and associated with the ematch yet. Signed-off-by: Thomas Graf <tgraf@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>

text ematch: check for NULL pointer before destroying textsearch config
While validating the configuration em_ops is already set, thus the individual destroy functions are called, but the ematch data has not been allocated and associated with the ematch yet. Signed-off-by: Thomas Graf <tgraf@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Thomas Graf · David S. Miller
1 parent 636f8c6f68
Showing 1 changed file with 2 additions and 1 deletions Side-by-side Diff
net/sched/em_text.c
@@ -103,7 +103,8 @@
  
 static void em_text_destroy(struct tcf_proto *tp, struct tcf_ematch *m)
 {
-	textsearch_destroy(EM_TEXT_PRIV(m)->config);
+	if (EM_TEXT_PRIV(m) && EM_TEXT_PRIV(m)->config)
+		textsearch_destroy(EM_TEXT_PRIV(m)->config);
 }
  
 static int em_text_dump(struct sk_buff *skb, struct tcf_ematch *m)
...	...	@@ -103,7 +103,8 @@
103	103
104	104	static void em_text_destroy(struct tcf_proto tp, struct tcf_ematch m)
105	105	{
106		- textsearch_destroy(EM_TEXT_PRIV(m)->config);
	106	+ if (EM_TEXT_PRIV(m) && EM_TEXT_PRIV(m)->config)
	107	+ textsearch_destroy(EM_TEXT_PRIV(m)->config);
107	108	}
108	109
109	110	static int em_text_dump(struct sk_buff skb, struct tcf_ematch m)