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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-01-09 20:03:55 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-01-09 20:04:16 +0100 |
| commit | b38895c5773b00977ca6beff8ebbd2e3f55f1f84 (patch) | |
| tree | 1e37bac72abf29ab1a3a14c427c3610939438876 | |
| parent | c4ede3d3821a732120fd671846c2606a1eb4e8b3 (diff) | |
netfilter: nft_meta: fix lack of validation of the input register
We have to validate that the input register is in the range of
allowed registers, otherwise we can take a incorrect register
value as input that may lead us to a crash.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | net/netfilter/nft_meta.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c index b43975a43309..e8254ad2e5a9 100644 --- a/net/netfilter/nft_meta.c +++ b/net/netfilter/nft_meta.c @@ -239,6 +239,9 @@ static int nft_meta_init(const struct nft_ctx *ctx, const struct nft_expr *expr, return err; priv->sreg = ntohl(nla_get_be32(tb[NFTA_META_SREG])); + err = nft_validate_input_register(priv->sreg); + if (err < 0) + return err; return 0; } |