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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 <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Liping Zhang 2016-07-18 20:44:16 +08:00 committed by Pablo Neira Ayuso
parent c2d9a4293c
commit 1bc4e0136c
1 changed files with 5 additions and 0 deletions
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5
net/netfilter/nft_log.c
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@ -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]));