From 0bcfbafbcd345f285db0c3788e6359ceac6a008c Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Mon, 11 Apr 2022 13:01:25 +0200 Subject: [PATCH] netfilter: conntrack: avoid unconditional local_bh_disable Now that the conntrack entry isn't placed on the pcpu list anymore the bh only needs to be disabled in the 'expectation present' case. Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_conntrack_core.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index de1547a2830e..22492f7eb819 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -1736,10 +1736,9 @@ init_conntrack(struct net *net, struct nf_conn *tmpl, ecache ? ecache->expmask : 0, GFP_ATOMIC); - local_bh_disable(); cnet = nf_ct_pernet(net); if (cnet->expect_count) { - spin_lock(&nf_conntrack_expect_lock); + spin_lock_bh(&nf_conntrack_expect_lock); exp = nf_ct_find_expectation(net, zone, tuple); if (exp) { pr_debug("expectation arrives ct=%p exp=%p\n", @@ -1762,7 +1761,7 @@ init_conntrack(struct net *net, struct nf_conn *tmpl, #endif NF_CT_STAT_INC(net, expect_new); } - spin_unlock(&nf_conntrack_expect_lock); + spin_unlock_bh(&nf_conntrack_expect_lock); } if (!exp) __nf_ct_try_assign_helper(ct, tmpl, GFP_ATOMIC); @@ -1770,8 +1769,6 @@ init_conntrack(struct net *net, struct nf_conn *tmpl, /* Now it is going to be associated with an sk_buff, set refcount to 1. */ refcount_set(&ct->ct_general.use, 1); - local_bh_enable(); - if (exp) { if (exp->expectfn) exp->expectfn(ct, exp);