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netfilter: nft_dynset: report EOPNOTSUPP on missing set feature

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commit 95cd4bca7b1f4a25810f3ddfc5e767fb46931789 upstream.

If userspace requests a feature which is not available the original set
definition, then bail out with EOPNOTSUPP. If userspace sends
unsupported dynset flags (new feature not supported by this kernel),
then report EOPNOTSUPP to userspace. EINVAL should be only used to
report malformed netlink messages from userspace.

Fixes: 22fe54d5fe ("netfilter: nf_tables: add support for dynamic set updates")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pablo Neira Ayuso 2020-12-27 12:33:44 +01:00 committed by Greg Kroah-Hartman
parent 5e401ea716
commit a798b367a0
1 changed files with 3 additions and 3 deletions
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6
net/netfilter/nft_dynset.c
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@ -146,7 +146,7 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
u32 flags = ntohl(nla_get_be32(tb[NFTA_DYNSET_FLAGS]));
if (flags & ~NFT_DYNSET_F_INV)
return -EINVAL;
return -EOPNOTSUPP;
if (flags & NFT_DYNSET_F_INV)
priv->invert = true;
}
@ -179,7 +179,7 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
timeout = 0;
if (tb[NFTA_DYNSET_TIMEOUT] != NULL) {
if (!(set->flags & NFT_SET_TIMEOUT))
return -EINVAL;
return -EOPNOTSUPP;
err = nf_msecs_to_jiffies64(tb[NFTA_DYNSET_TIMEOUT], &timeout);
if (err)
@ -193,7 +193,7 @@ static int nft_dynset_init(const struct nft_ctx *ctx,
if (tb[NFTA_DYNSET_SREG_DATA] != NULL) {
if (!(set->flags & NFT_SET_MAP))
return -EINVAL;
return -EOPNOTSUPP;
if (set->dtype == NFT_DATA_VERDICT)
return -EOPNOTSUPP;