From: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Date: Tue, 16 Apr 2024 14:43:19 +0000 (+0000)
Subject: i40e: flower: validate control flags
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=174ee5bcfeb7a194b107a8e1a6fa9a1b98de399a;p=linux.git

i40e: flower: validate control flags

This driver currently doesn't support any control flags.

Use flow_rule_has_control_flags() to check for control flags,
such as can be set through `tc flower ... ip_flags frag`.

In case any control flags are masked, flow_rule_has_control_flags()
sets a NL extended error message, and we return -EOPNOTSUPP.

Only compile-tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 143e37ae88efd..1f188c052828b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -8671,6 +8671,10 @@ static int i40e_parse_cls_flower(struct i40e_vsi *vsi,
 
 		flow_rule_match_control(rule, &match);
 		addr_type = match.key->addr_type;
+
+		if (flow_rule_has_control_flags(match.mask->flags,
+						f->common.extack))
+			return -EOPNOTSUPP;
 	}
 
 	if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {