From ac4893980bbe79ce383daf9a0885666a30fe4c83 Mon Sep 17 00:00:00 2001 From: Hangyu Hua Date: Fri, 10 Feb 2023 15:17:30 +0800 Subject: [PATCH] netfilter: ctnetlink: fix possible refcount leak in ctnetlink_create_conntrack() nf_ct_put() needs to be called to put the refcount got by nf_conntrack_find_get() to avoid refcount leak when nf_conntrack_hash_check_insert() fails. Fixes: 7d367e06688d ("netfilter: ctnetlink: fix soft lockup when netlink adds new entries (v2)") Signed-off-by: Hangyu Hua Acked-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_conntrack_netlink.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 1286ae7..ca4d5bb 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -2375,12 +2375,15 @@ ctnetlink_create_conntrack(struct net *net, err = nf_conntrack_hash_check_insert(ct); if (err < 0) - goto err2; + goto err3; rcu_read_unlock(); return ct; +err3: + if (ct->master) + nf_ct_put(ct->master); err2: rcu_read_unlock(); err1: -- 2.7.4