[dpdk-dev] [PATCH 3/4] i40e: fix out-of-bounds access

[Beilei Xing <beilei.xing@intel.com>]

When calling i40e_flowtype_to_pctype in
i40e_get_hash_filter_global_config and
i40e_set_hash_filter_global_config, function
i40e_flowtype_to_pctype will be possibly
out-of-bounds accessed, because size of callee's array
is 15. So judge flow type before calling
i40e_flowtype_to_pctype.
Meanwhile do the same change in other functions.

Fixes: 782c8c92f13f ("i40e: add hash configuration")
Fixes: f2b2e2354bbd ("i40e: split function for hash and flow director input")
Fixes: 98f055707685 ("i40e: configure input fields for RSS or flow director")

Signed-off-by: Beilei Xing <beilei.xing@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 78ed6d0..678e23a 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -6625,6 +6625,9 @@ i40e_get_hash_filter_global_config(struct i40e_hw *hw,
 		mask &= ~(1UL << i);
 		/* Bit set indicats the coresponding flow type is supported */
 		g_cfg->valid_bit_mask[0] |= (1UL << i);
+		/* if flowtype is invalid, continue */
+		if (!I40E_VALID_FLOW(i))
+			continue;
 		pctype = i40e_flowtype_to_pctype(i);
 		reg = i40e_read_rx_ctl(hw, I40E_GLQF_HSYM(pctype));
 		if (reg & I40E_GLQF_HSYM_SYMH_ENA_MASK)
@@ -6696,6 +6699,9 @@ i40e_set_hash_filter_global_config(struct i40e_hw *hw,
 		if (!(mask0 & (1UL << i)))
 			continue;
 		mask0 &= ~(1UL << i);
+		/* if flowtype is invalid, continue */
+		if (!I40E_VALID_FLOW(i))
+			continue;
 		pctype = i40e_flowtype_to_pctype(i);
 		reg = (g_cfg->sym_hash_enable_mask[0] & (1UL << i)) ?
 				I40E_GLQF_HSYM_SYMH_ENA_MASK : 0;
@@ -7258,13 +7264,11 @@ i40e_hash_filter_inset_select(struct i40e_hw *hw,
 		return -EINVAL;
 	}
 
-	pctype = i40e_flowtype_to_pctype(conf->flow_type);
-	if (pctype == 0 || pctype > I40E_FILTER_PCTYPE_L2_PAYLOAD) {
-		PMD_DRV_LOG(ERR, "Not supported flow type (%u)",
-			    conf->flow_type);
+	if (!I40E_VALID_FLOW(conf->flow_type)) {
+		PMD_DRV_LOG(ERR, "invalid flow_type input.");
 		return -EINVAL;
 	}
-
+	pctype = i40e_flowtype_to_pctype(conf->flow_type);
 	ret = i40e_parse_input_set(&input_set, pctype, conf->field,
 				   conf->inset_size);
 	if (ret) {
@@ -7329,12 +7333,11 @@ i40e_fdir_filter_inset_select(struct i40e_pf *pf,
 		return -EINVAL;
 	}
 
-	pctype = i40e_flowtype_to_pctype(conf->flow_type);
-	if (pctype == 0 || pctype > I40E_FILTER_PCTYPE_L2_PAYLOAD) {
-		PMD_DRV_LOG(ERR, "Not supported flow type (%u)",
-			    conf->flow_type);
+	if (!I40E_VALID_FLOW(conf->flow_type)) {
+		PMD_DRV_LOG(ERR, "invalid flow_type input.");
 		return -EINVAL;
 	}
+	pctype = i40e_flowtype_to_pctype(conf->flow_type);
 	ret = i40e_parse_input_set(&input_set, pctype, conf->field,
 				   conf->inset_size);
 	if (ret) {
-- 
2.5.0