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authorPablo Neira Ayuso <pablo@netfilter.org>2020-08-20 14:12:54 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2020-08-21 19:00:14 +0200
commit6f03bf43ee05b31d3822def2a80f11b3591c55b3 (patch)
treec241a011e256f28d022f960143a9f3a348840a48 /net
parent0726763043dc10dd4c12481f050b1a5ef8f15410 (diff)
netfilter: nf_tables: add NFTA_SET_USERDATA if not null
Kernel sends an empty NFTA_SET_USERDATA attribute with no value if userspace adds a set with no NFTA_SET_USERDATA attribute. Fixes: e6d8ecac9e68 ("netfilter: nf_tables: Add new attributes into nft_set to store user data.") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
-rw-r--r--net/netfilter/nf_tables_api.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index fd814e514f94..71e501c5ad21 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3770,7 +3770,8 @@ static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
goto nla_put_failure;
}
- if (nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
+ if (set->udata &&
+ nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
goto nla_put_failure;
nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);