From 703ba88548082f91970ee91c9fb64ab582e391cd Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Mon, 20 Mar 2017 12:03:03 +0000 Subject: [PATCH] i40evf: dereference VSI after VSI has been null checked VSI is being dereferenced before the VSI null check; if VSI is null we end up with a null pointer dereference. Fix this by performing VSI deference after the VSI null check. Also remove the need for using adapter by using vsi->back->cinst. Detected by CoverityScan, CID#1419696, CID#1419697 ("Dereference before null check") Fixes: ed0e894de7c133 ("i40evf: add client interface") Signed-off-by: Colin Ian King Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/i40evf/i40evf_client.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_client.c b/drivers/net/ethernet/intel/i40evf/i40evf_client.c index 5b43e5b6e2eb..ee737680a0e9 100644 --- a/drivers/net/ethernet/intel/i40evf/i40evf_client.c +++ b/drivers/net/ethernet/intel/i40evf/i40evf_client.c @@ -34,12 +34,12 @@ static struct i40e_ops i40evf_lan_ops = { **/ void i40evf_notify_client_message(struct i40e_vsi *vsi, u8 *msg, u16 len) { - struct i40evf_adapter *adapter = vsi->back; - struct i40e_client_instance *cinst = adapter->cinst; + struct i40e_client_instance *cinst; if (!vsi) return; + cinst = vsi->back->cinst; if (!cinst || !cinst->client || !cinst->client->ops || !cinst->client->ops->virtchnl_receive) { dev_dbg(&vsi->back->pdev->dev, @@ -58,12 +58,13 @@ void i40evf_notify_client_message(struct i40e_vsi *vsi, u8 *msg, u16 len) **/ void i40evf_notify_client_l2_params(struct i40e_vsi *vsi) { - struct i40evf_adapter *adapter = vsi->back; - struct i40e_client_instance *cinst = adapter->cinst; + struct i40e_client_instance *cinst; struct i40e_params params; if (!vsi) return; + + cinst = vsi->back->cinst; memset(¶ms, 0, sizeof(params)); params.mtu = vsi->netdev->mtu; params.link_up = vsi->back->link_up; -- 2.30.2