--- zzzz-none-000/linux-4.4.60/drivers/net/ethernet/intel/igb/igb_main.c	2017-04-08 07:53:53.000000000 +0000
+++ jet-2400-727/linux-4.4.60/drivers/net/ethernet/intel/igb/igb_main.c	2021-03-17 14:36:41.000000000 +0000
@@ -1034,6 +1034,12 @@
 	if (!q_vector)
 		return;
 
+	/* Coming from igb_set_interrupt_capability, the vectors are not yet
+	 * allocated. So, q_vector is NULL so we should stop here.
+	 */
+	if (!q_vector)
+		return;
+
 	if (q_vector->tx.ring)
 		adapter->tx_ring[q_vector->tx.ring->queue_index] = NULL;