Fix possible SEGFAULT conditions

[project/odhcpd.git] / src / router.c

diff --git a/src/router.c b/src/router.c
index 5abf1e6..83da938 100644 (file)
--- a/src/router.c
+++ b/src/router.c
@@ -353,6 +353,11 @@ static void send_router_advert(struct uloop_timeout *event)
                uint32_t lifetime;
                uint8_t name[];
        } *search = alloca(sizeof(*search) + search_padded);
                uint32_t lifetime;
                uint8_t name[];
        } *search = alloca(sizeof(*search) + search_padded);

+
+       if (!search) {
+               syslog(LOG_ERR, "Alloca failed for dns search on interface %s", iface->ifname);
+               return;
+       }

        search->type = ND_OPT_DNS_SEARCH;
        search->len = search_len ? ((sizeof(*search) + search_padded) / 8) : 0;
        search->pad = 0;
        search->type = ND_OPT_DNS_SEARCH;
        search->len = search_len ? ((sizeof(*search) + search_padded) / 8) : 0;
        search->pad = 0;