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netfilter: nf_tables: remove useless U8_MAX validation

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After call nft_data_init, size is already validated and desc.len will
not exceed the sizeof(struct nft_data), i.e. 16 bytes. So it will never
exceed U8_MAX.

Furthermore, in nft_immediate_init, we forget to call nft_data_uninit
when desc.len exceeds U8_MAX, although this will not happen, but it's
a logical mistake.

Now remove these redundant validation introduced by commit 36b701fae1
("netfilter: nf_tables: validate maximum value of u32 netlink attributes")

Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Liping Zhang 2016-10-29 21:56:27 +08:00 committed by Pablo Neira Ayuso
parent 2fa841938c
commit e41e9d623c
2 changed files with 0 additions and 6 deletions
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3
net/netfilter/nft_cmp.c
View file

@ -84,9 +84,6 @@ static int nft_cmp_init(const struct nft_ctx *ctx, const struct nft_expr *expr,
if (err < 0)
return err;
if (desc.len > U8_MAX)
return -ERANGE;
priv->op = ntohl(nla_get_be32(tb[NFTA_CMP_OP]));
priv->len = desc.len;
return 0;

3
net/netfilter/nft_immediate.c
View file

@ -54,9 +54,6 @@ static int nft_immediate_init(const struct nft_ctx *ctx,
if (err < 0)
return err;
if (desc.len > U8_MAX)
return -ERANGE;
priv->dlen = desc.len;
priv->dreg = nft_parse_register(tb[NFTA_IMMEDIATE_DREG]);