ioctl: fix NULL check after dereference (CID 1204326)

diff --git a/src/util-ioctl.c b/src/util-ioctl.c
index 99a84a7e62c891b0726439e7b1e4546425147a11..e0b5ef824b2d52a1fc246ab703b2bf88869e2c21 100644 (file)
--- a/src/util-ioctl.c
+++ b/src/util-ioctl.c
@@ -117,18 +117,16 @@ int GetIfaceMTU(const char *pcap_dev)
  */
 int GetIfaceMaxPacketSize(const char *pcap_dev)
 {
-    int ll_header = GetIfaceMaxHWHeaderLength(pcap_dev);
-    int mtu = 0;
-
     if ((pcap_dev == NULL) || strlen(pcap_dev) == 0)
         return 0;
 
-    mtu = GetIfaceMTU(pcap_dev);
+    int mtu = GetIfaceMTU(pcap_dev);
     switch (mtu) {
         case 0:
         case -1:
             return 0;
     }
+    int ll_header = GetIfaceMaxHWHeaderLength(pcap_dev);
     if (ll_header == -1) {
         /* be conservative, choose a big one */
         ll_header = 16;