[ Upstream commit
292781c3c5485ce33bd22b2ef1b2bed709b4d672 ]
Flag (1 << 0) is ignored is set, never used, reject it it with EINVAL
instead.
Fixes:
0ca743a55991 ("netfilter: nf_tables: add compatibility layer for x_tables")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
/**
* enum nft_rule_compat_flags - nf_tables rule compat flags
*
+ * @NFT_RULE_COMPAT_F_UNUSED: unused
* @NFT_RULE_COMPAT_F_INV: invert the check result
*/
enum nft_rule_compat_flags {
+ NFT_RULE_COMPAT_F_UNUSED = (1 << 0),
NFT_RULE_COMPAT_F_INV = (1 << 1),
NFT_RULE_COMPAT_F_MASK = NFT_RULE_COMPAT_F_INV,
};
return -EINVAL;
flags = ntohl(nla_get_be32(tb[NFTA_RULE_COMPAT_FLAGS]));
- if (flags & ~NFT_RULE_COMPAT_F_MASK)
+ if (flags & NFT_RULE_COMPAT_F_UNUSED ||
+ flags & ~NFT_RULE_COMPAT_F_MASK)
return -EINVAL;
if (flags & NFT_RULE_COMPAT_F_INV)
*inv = true;