[PATCH net-next V3 1/7] net/sched: cls_flower: Properly handle classifier flags dumping

[Or Gerlitz]

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 <ogerl...@mellanox.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;
-- 
2.3.7