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netfilter: nf_tables: fix a missing check of nla_put_failure

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If nla_nest_start() may fail. The fix checks its return value and goes
to nla_put_failure if it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Kangjie Lu 2018-12-21 00:46:23 -06:00 committed by Pablo Neira Ayuso
parent a3c9311f62
commit eb8950861c
1 changed files with 2 additions and 0 deletions
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net/netfilter/nf_tables_api.c
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@ -5727,6 +5727,8 @@ static int nf_tables_fill_flowtable_info(struct sk_buff *skb, struct net *net,
goto nla_put_failure;
nest = nla_nest_start(skb, NFTA_FLOWTABLE_HOOK);
if (!nest)
goto nla_put_failure;
if (nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_NUM, htonl(flowtable->hooknum)) ||
nla_put_be32(skb, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(flowtable->priority)))
goto nla_put_failure;