libsystemd-dhcp: DNS name option must be a multiple of 4 bytes

diff --git a/src/libsystemd-dhcp/sd-dhcp-client.c b/src/libsystemd-dhcp/sd-dhcp-client.c
index 7e5c36a857b897a09b24b35e47605b976558dff7..8115b7f769f8e20e1149d55c41fae95682a732c5 100644 (file)
--- a/src/libsystemd-dhcp/sd-dhcp-client.c
+++ b/src/libsystemd-dhcp/sd-dhcp-client.c
@@ -760,7 +760,7 @@ static int client_parse_offer(uint8_t code, uint8_t len, const uint8_t *option,
                 break;
 
         case DHCP_OPTION_DOMAIN_NAME_SERVER:
-                if (len >= 4) {
+                if (len && !(len % 4)) {
                         unsigned i;
 
                         lease->dns_size = len / 4;