From: Hangyu Hua hbh25y@gmail.com
[ 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 --- 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 b084659bd34bc..733e61fc50433 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -1906,12 +1906,15 @@ 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: