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@xxxxxxxxxxxxx> --- net/netfilter/nft_meta.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c index b43975a..e8254ad 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; } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
