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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-10-13 21:50:22 +0400 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-10-13 22:42:00 +0400 |
| commit | 7210e4e38f945dfa173c4a4e59ad827c9ecad541 (patch) | |
| tree | f86826588257abd66235761163e113bfdd82594f /net/ipv4 | |
| parent | ab2d7251d666995740da17b2a51ca545ac5dd037 (diff) | |
| download | linux-7210e4e38f945dfa173c4a4e59ad827c9ecad541.tar.xz | |
netfilter: nf_tables: restrict nat/masq expressions to nat chain type
This adds the missing validation code to avoid the use of nat/masq from
non-nat chains. The validation assumes two possible configuration
scenarios:
1) Use of nat from base chain that is not of nat type. Reject this
configuration from the nft_*_init() path of the expression.
2) Use of nat from non-base chain. In this case, we have to wait until
the non-base chain is referenced by at least one base chain via
jump/goto. This is resolved from the nft_*_validate() path which is
called from nf_tables_check_loops().
The user gets an -EOPNOTSUPP in both cases.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/netfilter/nft_masq_ipv4.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/nft_masq_ipv4.c b/net/ipv4/netfilter/nft_masq_ipv4.c index 1c636d6b5b50..c1023c445920 100644 --- a/net/ipv4/netfilter/nft_masq_ipv4.c +++ b/net/ipv4/netfilter/nft_masq_ipv4.c @@ -39,6 +39,7 @@ static const struct nft_expr_ops nft_masq_ipv4_ops = { .eval = nft_masq_ipv4_eval, .init = nft_masq_init, .dump = nft_masq_dump, + .validate = nft_masq_validate, }; static struct nft_expr_type nft_masq_ipv4_type __read_mostly = { |