ixgbe: fix possible NULL pointer deference in shutdown path

After freeing the rings we were not zeroing out the ring count values.
This patch now clears these counts correctly.

Reported-by: Yinghai Lu <[email protected]>
Signed-off-by: Don Skidmore <[email protected]>
Tested-by: Stephen Ko <[email protected]>
Signed-off-by: Jeff Kirsher <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index fbad4d819608f234d0eff25175bccf9a8545c20b..eee0b298bd3616558ca8d9f5cf44a02fe95c68e7 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -4771,6 +4771,9 @@ void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
                adapter->rx_ring[i] = NULL;
        }
 
+       adapter->num_tx_queues = 0;
+       adapter->num_rx_queues = 0;
+
        ixgbe_free_q_vectors(adapter);
        ixgbe_reset_interrupt_capability(adapter);
 }