[PATCH 5.4 75/76] netfilter: nf_nat: Fix memleak in nf_nat_init

[Greg Kroah-Hartman]

From: Dinghao Liu <dinghao....@zju.edu.cn>

commit 869f4fdaf4ca7bb6e0d05caf6fa1108dddc346a7 upstream.

When register_pernet_subsys() fails, nf_nat_bysource
should be freed just like when nf_ct_extend_register()
fails.

Fixes: 1cd472bf036ca ("netfilter: nf_nat: add nat hook register functions to 
nf_nat")
Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
Acked-by: Florian Westphal <f...@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 net/netfilter/nf_nat_core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -1174,6 +1174,7 @@ static int __init nf_nat_init(void)
        ret = register_pernet_subsys(&nat_net_ops);
        if (ret < 0) {
                nf_ct_extend_unregister(&nat_extend);
+               kvfree(nf_nat_bysource);
                return ret;
        }