diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2023-05-16 17:06:12 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-30 12:42:12 +0100 |
| commit | f56012aecadb80ff127a1f1590ff65a41ba19786 (patch) | |
| tree | 26058ae979315983c6b732555035e91dd53b4011 /net | |
| parent | 835fd72f61c6162f10471df197f0e4b92b1a7b76 (diff) | |
| download | linux-stable-f56012aecadb80ff127a1f1590ff65a41ba19786.tar.gz linux-stable-f56012aecadb80ff127a1f1590ff65a41ba19786.tar.bz2 linux-stable-f56012aecadb80ff127a1f1590ff65a41ba19786.zip | |
netfilter: nf_tables: validate NFTA_SET_ELEM_OBJREF based on NFT_SET_OBJECT flag
[ 5a2f3dc31811e93be15522d9eb13ed61460b76c8 ]
If the NFTA_SET_ELEM_OBJREF netlink attribute is present and
NFT_SET_OBJECT flag is set on, report EINVAL.
Move existing sanity check earlier to validate that NFT_SET_OBJECT
requires NFTA_SET_ELEM_OBJREF.
Fixes: 8aeff920dcc9 ("netfilter: nf_tables: add stateful object reference to set elements")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index ab1e0f0962a2..5cafa90f9d80 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -4440,6 +4440,15 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, return -EINVAL; } + if (set->flags & NFT_SET_OBJECT) { + if (!nla[NFTA_SET_ELEM_OBJREF] && + !(flags & NFT_SET_ELEM_INTERVAL_END)) + return -EINVAL; + } else { + if (nla[NFTA_SET_ELEM_OBJREF]) + return -EINVAL; + } + if ((flags & NFT_SET_ELEM_INTERVAL_END) && (nla[NFTA_SET_ELEM_DATA] || nla[NFTA_SET_ELEM_OBJREF] || @@ -4474,10 +4483,6 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, } if (nla[NFTA_SET_ELEM_OBJREF] != NULL) { - if (!(set->flags & NFT_SET_OBJECT)) { - err = -EINVAL; - goto err2; - } obj = nft_obj_lookup(ctx->table, nla[NFTA_SET_ELEM_OBJREF], set->objtype, genmask); if (IS_ERR(obj)) { |