From: Holger Eitzenberger Date: Wed, 25 Mar 2009 17:44:01 +0000 (+0100) Subject: netfilter: limit the length of the helper name X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=af9d32ad6718b9a80fa89f557cc1fbb63a93ec15;p=linux-beck.git netfilter: limit the length of the helper name This is necessary in order to have an upper bound for Netlink message calculation, which is not a problem at all, as there are no helpers with a longer name. Signed-off-by: Holger Eitzenberger Signed-off-by: Patrick McHardy --- diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h index 66d65a7caa39..ee2a4b369a04 100644 --- a/include/net/netfilter/nf_conntrack_helper.h +++ b/include/net/netfilter/nf_conntrack_helper.h @@ -14,6 +14,8 @@ struct module; +#define NF_CT_HELPER_NAME_LEN 16 + struct nf_conntrack_helper { struct hlist_node hnode; /* Internal use. */ diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c index a51bdac9f3a0..805cfdd42303 100644 --- a/net/netfilter/nf_conntrack_helper.c +++ b/net/netfilter/nf_conntrack_helper.c @@ -142,6 +142,7 @@ int nf_conntrack_helper_register(struct nf_conntrack_helper *me) BUG_ON(me->expect_policy == NULL); BUG_ON(me->expect_class_max >= NF_CT_MAX_EXPECT_CLASSES); + BUG_ON(strlen(me->name) > NF_CT_HELPER_NAME_LEN - 1); mutex_lock(&nf_ct_helper_mutex); hlist_add_head_rcu(&me->hnode, &nf_ct_helper_hash[h]);