sd-dhcp-client: fix busy loop reading zero sized DHCP UDP packets. (#3299)

2016-05-20 04:26:27 -07:00 · 2016-05-20 04:26:27 -07:00 · ad5ae47a0d
parent 35b132e8ad
commit ad5ae47a0d
1 changed files with 3 additions and 0 deletions
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@ -1636,6 +1636,9 @@ static int client_receive_message_udp(
        if (buflen < 0)
                return buflen;

+        if (buflen == 0)
+                buflen = 1;
+
        message = malloc0(buflen);
        if (!message)
                return -ENOMEM;