netdev - [PATCH net 2/2] net/sched: flower: add missing validation of TCA_FLOWER

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Message-Id: <6f39f0296c4cd7b339764c863cde8fdf04b83ec6.1581444848.git.dcaratti@redhat.com>
Date:   Tue, 11 Feb 2020 19:33:40 +0100
From:   Davide Caratti <dcaratti@...hat.com>
To:     Amir Vadai <amir@...ai.me>, Yotam Gigi <yotamg@...lanox.com>,
        Jiri Pirko <jiri@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org
Subject: [PATCH net 2/2] net/sched: flower: add missing validation of TCA_FLOWER_FLAGS

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 <dcaratti@...hat.com>
---
 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
-- 
2.24.1