From: Roy Marples <roy@marples.name>
Date: Wed, 4 Sep 2019 11:11:31 +0000 (+0100)
Subject: control: Add safety check to queue data
X-Git-Tag: v8.0.4~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b34ed81fddc3ec22c90bbd3ff73df2c13e9b2099;p=thirdparty%2Fdhcpcd.git

control: Add safety check to queue data
---

diff --git a/src/control.c b/src/control.c
index 6060e897..4ae22793 100644
--- a/src/control.c
+++ b/src/control.c
@@ -381,6 +381,9 @@ control_queue(struct fd_list *fd, void *data, size_t data_len, bool fit)
 {
 	struct fd_data *d;
 
+	if (data_len == 0)
+		return 0;
+
 #ifdef CTL_FREE_LIST
 	struct fd_data *df;