diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-07-02 04:16:30 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-07-02 21:04:10 +0200 |
| commit | 7e6bc1f6cabcd30aba0b11219d8e01b952eacbb6 (patch) | |
| tree | a4418248c8ef89042ae48ab8e2cb11da4f59da2c /net | |
| parent | f8ebb3ac881b17712e1d5967c97ab1806b16d3d6 (diff) | |
netfilter: nf_tables: stricter validation of element data
Make sure element data type and length do not mismatch the one specified
by the set declaration.
Fixes: 7d7402642eaf ("netfilter: nf_tables: variable sized set element keys / data")
Reported-by: Hugues ANGUELKOV <hanguelkov@randorisec.fr>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 51144fc66889..d6b59beab3a9 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -5213,13 +5213,20 @@ static int nft_setelem_parse_data(struct nft_ctx *ctx, struct nft_set *set, struct nft_data *data, struct nlattr *attr) { + u32 dtype; int err; err = nft_data_init(ctx, data, NFT_DATA_VALUE_MAXLEN, desc, attr); if (err < 0) return err; - if (desc->type != NFT_DATA_VERDICT && desc->len != set->dlen) { + if (set->dtype == NFT_DATA_VERDICT) + dtype = NFT_DATA_VERDICT; + else + dtype = NFT_DATA_VALUE; + + if (dtype != desc->type || + set->dlen != desc->len) { nft_data_release(data, desc->type); return -EINVAL; } |