From 889a4cd27f7d1e1b4ee1474c727861921c1dc9d8 Mon Sep 17 00:00:00 2001 From: Gao feng Date: Thu, 21 Jun 2012 04:36:42 +0000 Subject: [PATCH] netfilter: nf_conntrack: fix memory leak if sysctl registration fails In nf_ct_l4proto_register_sysctl, if l4proto sysctl registration fails, we have to make sure that we release the compat sysctl table. This can happen if TCP has been registered compat for IPv4, and IPv6 compat registration fails. Signed-off-by: Gao feng Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nf_conntrack_proto.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c index 63612e6d7238f..21b850c4b3ab6 100644 --- a/net/netfilter/nf_conntrack_proto.c +++ b/net/netfilter/nf_conntrack_proto.c @@ -341,11 +341,14 @@ int nf_ct_l4proto_register_sysctl(struct net *net, kfree(pn->ctl_table); pn->ctl_table = NULL; } - goto out; } } #ifdef CONFIG_NF_CONNTRACK_PROC_COMPAT if (l4proto->l3proto != AF_INET6 && pn->ctl_compat_table != NULL) { + if (err < 0) { + nf_ct_kfree_compat_sysctl_table(pn); + goto out; + } err = nf_ct_register_sysctl(net, &pn->ctl_compat_header, "net/ipv4/netfilter", @@ -358,8 +361,8 @@ int nf_ct_l4proto_register_sysctl(struct net *net, &pn->ctl_table, pn->users); } -#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */ out: +#endif /* CONFIG_NF_CONNTRACK_PROC_COMPAT */ #endif /* CONFIG_SYSCTL */ return err; } -- 2.39.5