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netfilter: nf_tables: relax NFTA_SET_ELEM_KEY_END set flags requirements
[ Upstream commit 96df836 ] 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: 88cccd9 ("netfilter: nf_tables: NFTA_SET_ELEM_KEY_END requires concat and interval flags") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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