From: Ahmed Zaki ahmed.zaki@intel.com

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@vger.kernel.org Fixes: 1f7ea1cd6a37 ("ice: Enable FDIR Configure for AVF") Reviewed-by: Przemek Kitszel przemyslaw.kitszel@intel.com Suggested-by: Sridhar Samudrala sridhar.samudrala@intel.com Signed-off-by: Ahmed Zaki ahmed.zaki@intel.com Reviewed-by: Wojciech Drewek wojciech.drewek@intel.com Tested-by: Rafal Romanowski rafal.romanowski@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org [Sherry: bp to fix CVE-2024-42291. Ignore context change in ice_fdir.h to resolve conflicts.] Signed-off-by: Sherry Yang sherry.yang@oracle.com --- .../net/ethernet/intel/ice/ice_ethtool_fdir.c | 2 +- drivers/net/ethernet/intel/ice/ice_fdir.h | 3 +++ .../net/ethernet/intel/ice/ice_virtchnl_fdir.c | 16 ++++++++++++++++ .../net/ethernet/intel/ice/ice_virtchnl_fdir.h | 1 + 4 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c index 0106ea3519a0..b52b77579c7f 100644 --- a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c +++ b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c @@ -456,7 +456,7 @@ ice_parse_rx_flow_user_data(struct ethtool_rx_flow_spec *fsp, * * 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; diff --git a/drivers/net/ethernet/intel/ice/ice_fdir.h b/drivers/net/ethernet/intel/ice/ice_fdir.h index d2d40e18ae8a..32e9258d27d7 100644 --- a/drivers/net/ethernet/intel/ice/ice_fdir.h +++ b/drivers/net/ethernet/intel/ice/ice_fdir.h @@ -201,6 +201,8 @@ struct ice_fdir_base_pkt { const u8 *tun_pkt; };

+struct ice_vsi; + enum ice_status ice_alloc_fd_res_cntr(struct ice_hw *hw, u16 *cntr_id); enum ice_status ice_free_fd_res_cntr(struct ice_hw *hw, u16 cntr_id); enum ice_status @@ -214,6 +216,7 @@ enum ice_status 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 * diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c index 412deb36b645..2ca8102e8f36 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.c @@ -744,6 +744,8 @@ static void ice_vc_fdir_reset_cnt_all(struct ice_vf_fdir *fdir) fdir->fdir_fltr_cnt[flow][0] = 0; fdir->fdir_fltr_cnt[flow][1] = 0; } + + fdir->fdir_fltr_cnt_total = 0; }

/** @@ -1837,6 +1839,7 @@ ice_vc_add_fdir_fltr_post(struct ice_vf *vf, struct ice_vf_fdir_ctx *ctx, 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); @@ -1901,6 +1904,7 @@ ice_vc_del_fdir_fltr_post(struct ice_vf *vf, struct ice_vf_fdir_ctx *ctx, 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); @@ -2065,6 +2069,7 @@ int ice_vc_add_fdir_fltr(struct ice_vf *vf, u8 *msg) 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; @@ -2073,6 +2078,17 @@ int ice_vc_add_fdir_fltr(struct ice_vf *vf, u8 *msg)

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; diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h index f4e629f4c09b..6258af1ff0aa 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl_fdir.h @@ -28,6 +28,7 @@ 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;