netdev - [PATCH net-next V4 1/7] net/sched: cls_flower: Properly handle classifier flags dumping

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Message-Id: <1487233876-28576-2-git-send-email-ogerlitz@mellanox.com>
Date:   Thu, 16 Feb 2017 10:31:10 +0200
From:   Or Gerlitz <ogerlitz@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Jamal Hadi Salim <jhs@...atatu.com>, Roi Dayan <roid@...lanox.com>,
        netdev@...r.kernel.org, Or Gerlitz <ogerlitz@...lanox.com>
Subject: [PATCH net-next V4 1/7] net/sched: cls_flower: Properly handle classifier flags dumping

Dump the classifier flags only if non zero and make sure to check
the return status of the handler that puts them into the netlink msg.

Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
---
 net/sched/cls_flower.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 0826c8e..850d982 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -1229,7 +1229,8 @@ static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
 	if (fl_dump_key_flags(skb, key->control.flags, mask->control.flags))
 		goto nla_put_failure;
 
-	nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags);
+	if (f->flags && nla_put_u32(skb, TCA_FLOWER_FLAGS, f->flags))
+		goto nla_put_failure;
 
 	if (tcf_exts_dump(skb, &f->exts))
 		goto nla_put_failure;
-- 
2.5.5