6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ahmed Zaki <ahmed.zaki@xxxxxxxxx>
commit 6ebbe97a488179f5dc85f2f1e0c89b486e99ee97 upstream.
While the iavf driver adds a s/w limit (128) on the number of FDIR
filters that the VF can request, a malicious VF driver can request more
than that and exhaust the resources for other VFs.
Add a similar limit in ice.
CC: stable@xxxxxxxxxxxxxxx
Fixes: 1f7ea1cd6a37 ("ice: Enable FDIR Configure for AVF")
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@xxxxxxxxx>
Suggested-by: Sridhar Samudrala <sridhar.samudrala@xxxxxxxxx>
Signed-off-by: Ahmed Zaki <ahmed.zaki@xxxxxxxxx>
Reviewed-by: Wojciech Drewek <wojciech.drewek@xxxxxxxxx>
Tested-by: Rafal Romanowski <rafal.romanowski@xxxxxxxxx>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c | 2 +-
drivers/net/ethernet/intel/ice/ice_fdir.h | 3 +++
drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c | 16 ++++++++++++++++
drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h | 1 +
4 files changed, 21 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c
@@ -531,7 +531,7 @@ ice_parse_rx_flow_user_data(struct ethto
*
* Returns the number of available flow director filters to this VSI
*/
-static int ice_fdir_num_avail_fltr(struct ice_hw *hw, struct ice_vsi *vsi)
+int ice_fdir_num_avail_fltr(struct ice_hw *hw, struct ice_vsi *vsi)
{
u16 vsi_num = ice_get_hw_vsi_num(hw, vsi->idx);
u16 num_guar;
--- a/drivers/net/ethernet/intel/ice/ice_fdir.h
+++ b/drivers/net/ethernet/intel/ice/ice_fdir.h
@@ -202,6 +202,8 @@ struct ice_fdir_base_pkt {
const u8 *tun_pkt;
};
+struct ice_vsi;
+
int ice_alloc_fd_res_cntr(struct ice_hw *hw, u16 *cntr_id);
int ice_free_fd_res_cntr(struct ice_hw *hw, u16 cntr_id);
int ice_alloc_fd_guar_item(struct ice_hw *hw, u16 *cntr_id, u16 num_fltr);
@@ -213,6 +215,7 @@ int
ice_fdir_get_gen_prgm_pkt(struct ice_hw *hw, struct ice_fdir_fltr *input,
u8 *pkt, bool frag, bool tun);
int ice_get_fdir_cnt_all(struct ice_hw *hw);
+int ice_fdir_num_avail_fltr(struct ice_hw *hw, struct ice_vsi *vsi);
bool ice_fdir_is_dup_fltr(struct ice_hw *hw, struct ice_fdir_fltr *input);
bool ice_fdir_has_frag(enum ice_fltr_ptype flow);
struct ice_fdir_fltr *
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c
@@ -551,6 +551,8 @@ static void ice_vc_fdir_reset_cnt_all(st
fdir->fdir_fltr_cnt[flow][0] = 0;
fdir->fdir_fltr_cnt[flow][1] = 0;
}
+
+ fdir->fdir_fltr_cnt_total = 0;
}
/**
@@ -1567,6 +1569,7 @@ ice_vc_add_fdir_fltr_post(struct ice_vf
resp->status = status;
resp->flow_id = conf->flow_id;
vf->fdir.fdir_fltr_cnt[conf->input.flow_type][is_tun]++;
+ vf->fdir.fdir_fltr_cnt_total++;
ret = ice_vc_send_msg_to_vf(vf, ctx->v_opcode, v_ret,
(u8 *)resp, len);
@@ -1631,6 +1634,7 @@ ice_vc_del_fdir_fltr_post(struct ice_vf
resp->status = status;
ice_vc_fdir_remove_entry(vf, conf, conf->flow_id);
vf->fdir.fdir_fltr_cnt[conf->input.flow_type][is_tun]--;
+ vf->fdir.fdir_fltr_cnt_total--;
ret = ice_vc_send_msg_to_vf(vf, ctx->v_opcode, v_ret,
(u8 *)resp, len);
@@ -1797,6 +1801,7 @@ int ice_vc_add_fdir_fltr(struct ice_vf *
struct virtchnl_fdir_add *stat = NULL;
struct virtchnl_fdir_fltr_conf *conf;
enum virtchnl_status_code v_ret;
+ struct ice_vsi *vf_vsi;
struct device *dev;
struct ice_pf *pf;
int is_tun = 0;
@@ -1805,6 +1810,17 @@ int ice_vc_add_fdir_fltr(struct ice_vf *
pf = vf->pf;
dev = ice_pf_to_dev(pf);
+ vf_vsi = ice_get_vf_vsi(vf);
+
+#define ICE_VF_MAX_FDIR_FILTERS 128
+ if (!ice_fdir_num_avail_fltr(&pf->hw, vf_vsi) ||
+ vf->fdir.fdir_fltr_cnt_total >= ICE_VF_MAX_FDIR_FILTERS) {
+ v_ret = VIRTCHNL_STATUS_ERR_PARAM;
+ dev_err(dev, "Max number of FDIR filters for VF %d is reached\n",
+ vf->vf_id);
+ goto err_exit;
+ }
+
ret = ice_vc_fdir_param_check(vf, fltr->vsi_id);
if (ret) {
v_ret = VIRTCHNL_STATUS_ERR_PARAM;
--- a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h
+++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h
@@ -29,6 +29,7 @@ struct ice_vf_fdir_ctx {
struct ice_vf_fdir {
u16 fdir_fltr_cnt[ICE_FLTR_PTYPE_MAX][ICE_FD_HW_SEG_MAX];
int prof_entry_cnt[ICE_FLTR_PTYPE_MAX][ICE_FD_HW_SEG_MAX];
+ u16 fdir_fltr_cnt_total;
struct ice_fd_hw_prof **fdir_prof;
struct idr fdir_rule_idr;
