diff --git a/sys/gdb/netgdb.c b/sys/gdb/netgdb.c
--- a/sys/gdb/netgdb.c
+++ b/sys/gdb/netgdb.c
@@ -111,12 +111,11 @@
 /* TODO(CEM) disable ack mode */
 
 /*
- * Receive non-TX ACK packets on the client port.
+ * Attempt to accept the incoming packet. If we run into ENOBUFS or another
+ * error, return it.
  *
  * The mbuf chain will have all framing headers removed (ethernet, inet, udp,
- * debugnet). If the handler frees the mbuf chain, it should set the mbuf pointer
- * to NULL. Otherwise, the debugnet input framework will free the
- * chain.
+ * debugnet).
  */
 static int
 netgdb_rx(struct mbuf *m)