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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2012-04-03 14:50:07 +02:00 committed by David S. Miller
parent ca53e44053
commit ee14186f8d
1 changed files with 19 additions and 5 deletions
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24
net/netfilter/xt_CT.c
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@ -150,6 +150,17 @@ static int xt_ct_tg_check_v0(const struct xt_tgchk_param *par)
return ret;
}
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
static void __xt_ct_tg_timeout_put(struct ctnl_timeout *timeout)
{
typeof(nf_ct_timeout_put_hook) timeout_put;
timeout_put = rcu_dereference(nf_ct_timeout_put_hook);
if (timeout_put)
timeout_put(timeout);
}
#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 +169,9 @@ 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 +229,6 @@ 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 +257,7 @@ 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 +270,13 @@ 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 +294,8 @@ static int xt_ct_tg_check_v1(const struct xt_tgchk_param *par)
return 0;
#ifdef CONFIG_NF_CONNTRACK_TIMEOUT
err5:
__xt_ct_tg_timeout_put(timeout);
err4:
rcu_read_unlock();
#endif