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netfilter: nf_tables: relax NFTA_SET_ELEM_KEY_END set flags requirements

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Otherwise EINVAL is bogusly reported to userspace when deleting a set
element. NFTA_SET_ELEM_KEY_END does not need to be set in case of:

- insertion: if not present, start key is used as end key.
- deletion: only start key needs to be specified, end key is ignored.

Hence, relax the sanity check.

Fixes: 88cccd908d ("netfilter: nf_tables: NFTA_SET_ELEM_KEY_END requires concat and interval flags")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2022-10-17 14:12:58 +02:00
parent 1fcc064b30
commit 96df8360db
1 changed files with 3 additions and 2 deletions
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5
net/netfilter/nf_tables_api.c
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@ -5865,8 +5865,9 @@ static bool nft_setelem_valid_key_end(const struct nft_set *set,
(NFT_SET_CONCAT | NFT_SET_INTERVAL)) {
if (flags & NFT_SET_ELEM_INTERVAL_END)
return false;
if (!nla[NFTA_SET_ELEM_KEY_END] &&
!(flags & NFT_SET_ELEM_CATCHALL))
if (nla[NFTA_SET_ELEM_KEY_END] &&
flags & NFT_SET_ELEM_CATCHALL)
return false;
} else {
if (nla[NFTA_SET_ELEM_KEY_END])