diff options
| author | Patrick McHardy <kaber@trash.net> | 2015-04-11 02:27:30 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-04-13 16:25:50 +0200 |
| commit | d07db9884a5fba8c8020166c86183c79a18d066a (patch) | |
| tree | 74579f0a339d2fa8f8586b5971311ba3ba62ecff /net/netfilter/nft_cmp.c | |
| parent | 27e6d2017abdfbdb8b790c34c93d65ee10ce2fc5 (diff) | |
netfilter: nf_tables: introduce nft_validate_register_load()
Change nft_validate_input_register() to not only validate the input
register number, but also the length of the load, and rename it to
nft_validate_register_load() to reflect that change.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nft_cmp.c')
| -rw-r--r-- | net/netfilter/nft_cmp.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/net/netfilter/nft_cmp.c b/net/netfilter/nft_cmp.c index e2b3f51c81f1..17e9b8beaa1d 100644 --- a/net/netfilter/nft_cmp.c +++ b/net/netfilter/nft_cmp.c @@ -75,12 +75,15 @@ static int nft_cmp_init(const struct nft_ctx *ctx, const struct nft_expr *expr, struct nft_data_desc desc; int err; - priv->sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG])); - priv->op = ntohl(nla_get_be32(tb[NFTA_CMP_OP])); - err = nft_data_init(NULL, &priv->data, &desc, tb[NFTA_CMP_DATA]); BUG_ON(err < 0); + priv->sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG])); + err = nft_validate_register_load(priv->sreg, desc.len); + if (err < 0) + return err; + + priv->op = ntohl(nla_get_be32(tb[NFTA_CMP_OP])); priv->len = desc.len; return 0; } @@ -122,13 +125,17 @@ static int nft_cmp_fast_init(const struct nft_ctx *ctx, u32 mask; int err; - priv->sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG])); - err = nft_data_init(NULL, &data, &desc, tb[NFTA_CMP_DATA]); BUG_ON(err < 0); - desc.len *= BITS_PER_BYTE; + priv->sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG])); + err = nft_validate_register_load(priv->sreg, desc.len); + if (err < 0) + return err; + + desc.len *= BITS_PER_BYTE; mask = nft_cmp_fast_mask(desc.len); + priv->data = data.data[0] & mask; priv->len = desc.len; return 0; @@ -167,7 +174,6 @@ nft_cmp_select_ops(const struct nft_ctx *ctx, const struct nlattr * const tb[]) { struct nft_data_desc desc; struct nft_data data; - enum nft_registers sreg; enum nft_cmp_ops op; int err; @@ -176,11 +182,6 @@ nft_cmp_select_ops(const struct nft_ctx *ctx, const struct nlattr * const tb[]) tb[NFTA_CMP_DATA] == NULL) return ERR_PTR(-EINVAL); - sreg = ntohl(nla_get_be32(tb[NFTA_CMP_SREG])); - err = nft_validate_input_register(sreg); - if (err < 0) - return ERR_PTR(err); - op = ntohl(nla_get_be32(tb[NFTA_CMP_OP])); switch (op) { case NFT_CMP_EQ: |