From b38895c5773b00977ca6beff8ebbd2e3f55f1f84 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Thu, 9 Jan 2014 20:03:55 +0100 Subject: [PATCH] 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 --- 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 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; } -- 2.20.1