netfilter: nf_tables: reject constant set with timeout
commit5f4fc4bd5c
upstream. This set combination is weird: it allows for elements to be added/deleted, but once bound to the rule it cannot be updated anymore. Eventually, all elements expire, leading to an empty set which cannot be updated anymore. Reject this flags combination. Cc: stable@vger.kernel.org Fixes:761da2935d
("netfilter: nf_tables: add set timeout API support") Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -5003,6 +5003,9 @@ static int nf_tables_newset(struct sk_buff *skb, const struct nfnl_info *info,
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if ((flags & (NFT_SET_ANONYMOUS | NFT_SET_TIMEOUT | NFT_SET_EVAL)) ==
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(NFT_SET_ANONYMOUS | NFT_SET_TIMEOUT))
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return -EOPNOTSUPP;
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if ((flags & (NFT_SET_CONSTANT | NFT_SET_TIMEOUT)) ==
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(NFT_SET_CONSTANT | NFT_SET_TIMEOUT))
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return -EOPNOTSUPP;
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}
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desc.dtype = 0;
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