diff options
| author | Laura Garcia Liebana <nevola@gmail.com> | 2016-09-14 15:00:02 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-09-23 09:29:02 +0200 |
| commit | 36b701fae12ac763a568037e4e7c96b5727a8b3e (patch) | |
| tree | 51cf6649e755c9ee786cfdbbd9d03a6d22baf37c /net/netfilter/nft_immediate.c | |
| parent | 2b03bf732488a3c2e920afe22c03b82cb8477e28 (diff) | |
netfilter: nf_tables: validate maximum value of u32 netlink attributes
Fetch value and validate u32 netlink attribute. This validation is
usually required when the u32 netlink attributes are being stored in a
field whose size is smaller.
This patch revisits 4da449ae1df9 ("netfilter: nft_exthdr: Add size check
on u8 nft_exthdr attributes").
Fixes: 96518518cc41 ("netfilter: add nftables")
Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Laura Garcia Liebana <nevola@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nft_immediate.c')
| -rw-r--r-- | net/netfilter/nft_immediate.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/netfilter/nft_immediate.c b/net/netfilter/nft_immediate.c index db3b746858e3..d17018ff54e6 100644 --- a/net/netfilter/nft_immediate.c +++ b/net/netfilter/nft_immediate.c @@ -53,6 +53,10 @@ static int nft_immediate_init(const struct nft_ctx *ctx, tb[NFTA_IMMEDIATE_DATA]); 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]); |