From 1bc4e0136cb32282d7968e11cfabc40763fdb03c Mon Sep 17 00:00:00 2001 From: Liping Zhang Date: Mon, 18 Jul 2016 20:44:16 +0800 Subject: [PATCH] netfilter: nft_log: check the validity of log level User can specify the log level larger than 7(debug level) via nfnetlink, this is invalid. So in this case, we should report EINVAL to the userspace. Signed-off-by: Liping Zhang Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_log.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/netfilter/nft_log.c b/net/netfilter/nft_log.c index e1b34ff0ebd0..5f6f088ff06e 100644 --- a/net/netfilter/nft_log.c +++ b/net/netfilter/nft_log.c @@ -79,6 +79,11 @@ static int nft_log_init(const struct nft_ctx *ctx, } else { li->u.log.level = LOGLEVEL_WARNING; } + if (li->u.log.level > LOGLEVEL_DEBUG) { + err = -EINVAL; + goto err1; + } + if (tb[NFTA_LOG_FLAGS] != NULL) { li->u.log.logflags = ntohl(nla_get_be32(tb[NFTA_LOG_FLAGS])); -- 2.20.1