i40e: check that pointer VSI is not null before dereferencing it

Function i40e_find_vsi_from_id can potentially return null, hence
VSI may be null, so defensively check it is non-null before
dereferencing it to check the seid.

Fixes: e284fc280473 ("i40e: Add and delete cloud filter")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Avinash Dayanand <avinash.dayanand@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 5cca083da93c7c416722fb68c3c90b67d82b9b60..14bbd5c1db7884f91d2d354d82fedc537f139d2c 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -3062,7 +3062,7 @@ static struct i40e_vsi *i40e_find_vsi_from_seid(struct i40e_vf *vf, u16 seid)
 
        for (i = 0; i < vf->num_tc ; i++) {
                vsi = i40e_find_vsi_from_id(pf, vf->ch[i].vsi_id);
-               if (vsi->seid == seid)
+               if (vsi && vsi->seid == seid)
                        return vsi;
        }
        return NULL;