diff --git a/hw/net/trace-events b/hw/net/trace-events
index 23efa91d05..001a20b0e2 100644
--- a/hw/net/trace-events
+++ b/hw/net/trace-events
@@ -527,3 +527,4 @@ xen_netdev_rx(int dev, int idx, int status, int flags) "vif%u idx %d status %d f
 # xilinx_ethlite.c
 ethlite_pkt_lost(uint32_t rx_ctrl) "rx_ctrl:0x%" PRIx32
 ethlite_pkt_size_too_big(uint64_t size) "size:0x%" PRIx64
+ethlite_pkt_tx_size_too_big(uint64_t size) "size:0x%" PRIx64
diff --git a/hw/net/xilinx_ethlite.c b/hw/net/xilinx_ethlite.c
index ba3acd4c77..7ea194475f 100644
--- a/hw/net/xilinx_ethlite.c
+++ b/hw/net/xilinx_ethlite.c
@@ -162,9 +162,15 @@ static void port_tx_write(void *opaque, hwaddr addr, uint64_t value,
         break;
     case TX_CTRL:
         if ((value & (CTRL_P | CTRL_S)) == CTRL_S) {
-            qemu_send_packet(qemu_get_queue(s->nic),
-                             txbuf_ptr(s, port_index),
-                             s->port[port_index].reg.tx_len);
+            uint32_t tx_size = s->port[port_index].reg.tx_len;
+
+            if (tx_size >= BUFSZ_MAX) {
+                trace_ethlite_pkt_tx_size_too_big(tx_size);
+            } else {
+                qemu_send_packet(qemu_get_queue(s->nic),
+                                 txbuf_ptr(s, port_index),
+                                 tx_size);
+            }
             if (s->port[port_index].reg.tx_ctrl & CTRL_I) {
                 eth_pulse_irq(s);
             }