[PATCH 1/9] netfilter: nf_tables: fix a missing check of nla_put_failure

[Pablo Neira Ayuso]

From: Kangjie Lu <k...@umn.edu>

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 <k...@umn.edu>
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index fec814dace5a..2b0a93300dd7 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -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;
-- 
2.11.0