diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-08-26 08:49:16 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2022-08-31 12:12:32 +0200 |
| commit | b118509076b39cc5e616c0680312b5caaca535fe (patch) | |
| tree | e5b4b13aaf965c1dbe031e047e18d69be848eeab /net/netfilter/nf_conntrack_core.c | |
| parent | 13a9d08c296228d18289de60b83792c586e1d073 (diff) | |
| download | linux-b118509076b39cc5e616c0680312b5caaca535fe.tar.gz | |
netfilter: remove nf_conntrack_helper sysctl and modparam toggles
__nf_ct_try_assign_helper() remains in place but it now requires a
template to configure the helper.
A toggle to disable automatic helper assignment was added by:
a9006892643a ("netfilter: nf_ct_helper: allow to disable automatic helper assignment")
in 2012 to address the issues described in "Secure use of iptables and
connection tracking helpers". Automatic conntrack helper assignment was
disabled by:
3bb398d925ec ("netfilter: nf_ct_helper: disable automatic helper assignment")
back in 2016.
This patch removes the sysctl and modparam toggles, users now have to
rely on explicit conntrack helper configuration via ruleset.
Update tools/testing/selftests/netfilter/nft_conntrack_helper.sh to
check that auto-assignment does not happen anymore.
Acked-by: Aaron Conole <aconole@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_conntrack_core.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_core.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 71c2f4f95d369d..1357a2729a4ba6 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1782,7 +1782,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl, } spin_unlock_bh(&nf_conntrack_expect_lock); } - if (!exp) + if (!exp && tmpl) __nf_ct_try_assign_helper(ct, tmpl, GFP_ATOMIC); /* Other CPU might have obtained a pointer to this object before it was @@ -2068,10 +2068,6 @@ void nf_conntrack_alter_reply(struct nf_conn *ct, ct->tuplehash[IP_CT_DIR_REPLY].tuple = *newreply; if (ct->master || (help && !hlist_empty(&help->expectations))) return; - - rcu_read_lock(); - __nf_ct_try_assign_helper(ct, NULL, GFP_ATOMIC); - rcu_read_unlock(); } EXPORT_SYMBOL_GPL(nf_conntrack_alter_reply); @@ -2797,7 +2793,6 @@ int nf_conntrack_init_net(struct net *net) nf_conntrack_acct_pernet_init(net); nf_conntrack_tstamp_pernet_init(net); nf_conntrack_ecache_pernet_init(net); - nf_conntrack_helper_pernet_init(net); nf_conntrack_proto_pernet_init(net); return 0; |