Subject: [PATCH 6/6] net/sched: flower: add missing validation of TCA_FLOWER_FLAGS

From: Davide Caratti <[email-masked]>
Date: Tue, 11 Feb 2020 19:33:40 +0100

[ Upstream commit e2debf0852c4d66ba1a8bde12869b196094c70a7 ]

unlike other classifiers that can be offloaded (i.e. users can set flags
like 'skip_hw' and 'skip_sw'), 'cls_flower' doesn't validate the size of
netlink attribute 'TCA_FLOWER_FLAGS' provided by user: add a proper entry
to fl_policy.

Fixes: 5b33f48842fa ("net/flower: Introduce hardware offload support")
Signed-off-by: Davide Caratti <[email-masked]>
Acked-by: Jiri Pirko <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 net/sched/cls_flower.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index f9c0d1e8d380..7e54d2ab5254 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -691,6 +691,7 @@ static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
 					    .len = 128 / BITS_PER_BYTE },
 	[TCA_FLOWER_KEY_CT_LABELS_MASK]	= { .type = NLA_BINARY,
 					    .len = 128 / BITS_PER_BYTE },
+	[TCA_FLOWER_FLAGS]		= { .type = NLA_U32 },
 };
 
 static const struct nla_policy
-- 
2.20.1