From: Hangyu Hua <hbh25y@gmail.com>
Date: Fri, 10 Feb 2023 15:17:30 +0800
Subject: [PATCH] netfilter: ctnetlink: fix possible refcount leak in
ctnetlink_create_conntrack()
References: bsc#1012628
Patch-mainline: 6.2.5
Git-commit: ac4893980bbe79ce383daf9a0885666a30fe4c83
[ Upstream commit ac4893980bbe79ce383daf9a0885666a30fe4c83 ]
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 <hbh25y@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
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 1286ae7d..ca4d5bb1 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:
--
2.35.3