From 6b9599e7a092a241e86e376d14bb1b45902f19b5 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Tue, 3 Apr 2012 14:50:07 +0200
Subject: [PATCH] netfilter: xt_CT: fix missing put timeout object in error path
The error path misses putting the timeout object. This patch adds
new function xt_ct_tg_timeout_put() to put the timeout object.
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/xt_CT.c | 28 +++++++++++++++++++++++-----
1 files changed, 23 insertions(+), 5 deletions(-)
@@ -150,6 +150,21 @@ err1:
return ret;
}
+#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
+static inline void xt_ct_tg_timeout_put(struct ctnl_timeout *timeout)
+{
+ typeof(nf_ct_timeout_put_hook) timeout_put;
+
+ rcu_read_lock();
+ timeout_put = rcu_dereference(nf_ct_timeout_put_hook);
+
+ if (timeout_put)
+ timeout_put(timeout);
+
+ rcu_read_unlock();
+}
+#endif
+
static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
{
struct xt_ct_target_info_v1 *info = par->targinfo;
@@ -158,7 +173,9 @@ static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
struct nf_conn *ct;
int ret = 0;
u8 proto;
-
+#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
+ struct ctnl_timeout *timeout;
+#endif
if (info->flags & ~XT_CT_NOTRACK)
return -EINVAL;
@@ -216,7 +233,6 @@ static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
if (info->timeout) {
typeof(nf_ct_timeout_find_get_hook) timeout_find_get;
- struct ctnl_timeout *timeout;
struct nf_conn_timeout *timeout_ext;
rcu_read_lock();
@@ -245,7 +261,7 @@ static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
pr_info("Timeout policy `%s' can only be "
"used by L3 protocol number %d\n",
info->timeout, timeout->l3num);
- goto err4;
+ goto err5;
}
/* Make sure the timeout policy matches any existing
* protocol tracker, otherwise default to generic.
@@ -258,13 +274,13 @@ static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
"used by L4 protocol number %d\n",
info->timeout,
timeout->l4proto->l4proto);
- goto err4;
+ goto err5;
}
timeout_ext = nf_ct_timeout_ext_add(ct, timeout,
GFP_ATOMIC);
if (timeout_ext == NULL) {
ret = -ENOMEM;
- goto err4;
+ goto err5;
}
} else {
ret = -ENOENT;
@@ -282,6 +298,8 @@ out:
return 0;
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
+err5:
+ xt_ct_tg_timeout_put(timeout);
err4:
rcu_read_unlock();
#endif
--
1.7.2.5