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net_sched: cancel nest attribute on failure in tcf_exts_dump()

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Like other places, we need to cancel the nest attribute after
we start. Fortunately the netlink message will not be sent on
failure, so it's not a big problem at all.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang 2014-07-16 14:25:30 -07:00 committed by David S. Miller
parent 4bbe3f5c71
commit 9cc63db5e1
1 changed files with 8 additions and 3 deletions
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11
net/sched/cls_api.c
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@ -561,13 +561,14 @@ EXPORT_SYMBOL(tcf_exts_change);
int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
struct nlattr *nest;
if (exts->action && !list_empty(&exts->actions)) {
/*
* again for backward compatible mode - we want
* to work with both old and new modes of entering
* tc data even if iproute2 was newer - jhs
*/
struct nlattr *nest;
if (exts->type != TCA_OLD_COMPAT) {
nest = nla_nest_start(skb, exts->action);
if (nest == NULL)
@ -585,10 +586,14 @@ int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts)
nla_nest_end(skb, nest);
}
}
#endif
return 0;
nla_put_failure: __attribute__ ((unused))
nla_put_failure:
nla_nest_cancel(skb, nest);
return -1;
#else
return 0;
#endif
}
EXPORT_SYMBOL(tcf_exts_dump);