From 7ac21b920ee6dd29574fc9fe58c8f1933e8864f6 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sat, 13 Aug 2022 15:22:05 +0200
Subject: [PATCH] netfilter: nf_tables: disallow NFT_SET_ELEM_CATCHALL and
NFT_SET_ELEM_INTERVAL_END
commit fc0ae524b5fd2938c94d56da3f749f11eb3273d5 upstream.
These flags are mutually exclusive, report EINVAL in this case.
Fixes: aaa31047a6d2 ("netfilter: nftables: add catch-all set element support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/netfilter/nf_tables_api.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index de889bc87d580..2a81369ad17d3 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -5101,6 +5101,9 @@ static int nft_setelem_parse_flags(const struct nft_set *set,
if (!(set->flags & NFT_SET_INTERVAL) &&
*flags & NFT_SET_ELEM_INTERVAL_END)
return -EINVAL;
+ if ((*flags & (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL)) ==
+ (NFT_SET_ELEM_INTERVAL_END | NFT_SET_ELEM_CATCHALL))
+ return -EINVAL;
return 0;
}
--
2.30.2