netdev - [PATCH net-next V2 2/2] net/sched: act_tunnel_key: Don't dump dst port if it wasn't set

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Date:   Sun,  2 Dec 2018 14:55:21 +0200
From:   Or Gerlitz <ogerlitz@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Adi Nissim <adin@...lanox.com>,
        Oz Shlomo <ozsh@...lanox.com>, Jiri Pirko <jiri@...lanox.com>
Subject: [PATCH net-next V2 2/2] net/sched: act_tunnel_key: Don't dump dst port if it wasn't set

From: Adi Nissim <adin@...lanox.com>

It's possible to set a tunnel without a destination port. However,
on dump(), a zero dst port is returned to user space even if it was not
set, fix that.

Note that so far it wasn't required, b/c key less tunnels were not
supported and the UDP tunnels do require destination port.

Signed-off-by: Adi Nissim <adin@...lanox.com>
Reviewed-by: Oz Shlomo <ozsh@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
---
 net/sched/act_tunnel_key.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c
index fad438c0f7a7..c3b90fadaff6 100644
--- a/net/sched/act_tunnel_key.c
+++ b/net/sched/act_tunnel_key.c
@@ -512,7 +512,9 @@ static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
 		     nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) ||
 		    tunnel_key_dump_addresses(skb,
 					      &params->tcft_enc_metadata->u.tun_info) ||
-		    nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, key->tp_dst) ||
+		    (key->tp_dst &&
+		      nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
+				   key->tp_dst)) ||
 		    nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
 			       !(key->tun_flags & TUNNEL_CSUM)) ||
 		    tunnel_key_opts_dump(skb, info))
-- 
2.17.0.2884.g4ede3d4