Fix a crash.

diff --git a/dhcpcd.c b/dhcpcd.c
index e06d513836674fee4d2a5c43cf8feab944699239..fd6851223967c832d02e5a836ed14176ef06bf8d 100644 (file)
--- a/dhcpcd.c
+++ b/dhcpcd.c
@@ -73,7 +73,7 @@ const char copyright[] = "Copyright (c) 2006-2013 Roy Marples";
 #define RELEASE_DELAY_S                0
 #define RELEASE_DELAY_NS       10000000
 
-struct if_head *ifaces;
+struct if_head *ifaces = NULL;
 char vendor[VENDORCLASSID_MAX_LEN];
 int pidfd = -1;
 struct if_options *if_options = NULL;
@@ -140,11 +140,13 @@ cleanup(void)
 
        free_options(if_options);
 
-       while ((ifp = TAILQ_FIRST(ifaces))) {
-               TAILQ_REMOVE(ifaces, ifp, next);
-               free_interface(ifp);
+       if (ifaces) {
+               while ((ifp = TAILQ_FIRST(ifaces))) {
+                       TAILQ_REMOVE(ifaces, ifp, next);
+                       free_interface(ifp);
+               }
+               free(ifaces);
        }
-       free(ifaces);
 
        for (i = 0; i < ifac; i++)
                free(ifav[i]);