[Intel-wired-lan] [next-queue S2 02/15] i40e: validate VSI param from VFs
Jeff Kirsher
jeffrey.t.kirsher at intel.com
Wed Mar 25 04:30:12 UTC 2015
From: Mitch Williams <mitch.a.williams at intel.com>
Validate that the VF has sent us a valid VSI index before actually using
that index. Without this code, a malicious or buggy VF driver could
panic the host by sending an invalid index into the VSI array.
Change-ID: I66a177687a0dcc281ec83e714d3813d70d18c8b4
Reported-by: Nick Nunley <nicholas.d.nunley at intel.com>
Signed-off-by: Mitch Williams <mitch.a.williams at intel.com>
---
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 0a93684..bb18412 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -57,6 +57,8 @@ static inline bool i40e_vc_isvalid_vsi_id(struct i40e_vf *vf, u8 vsi_id)
{
struct i40e_pf *pf = vf->pf;
+ if (vsi_id > pf->num_alloc_vsi)
+ return false;
return pf->vsi[vsi_id]->vf_id == vf->vf_id;
}
--
1.9.3
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