From: Liping Zhang <zlpnob...@gmail.com>
We should call module_put when the time policy is not found. Otherwise,
the related cthelper module cannot be removed anymore.
It is easy to reproduce by typing the following command:
# iptables -t raw -A OUTPUT -p tcp -j CT --helper ftp --timeout xxx
Signed-off-by: Liping Zhang <zlpnob...@gmail.com>
---
net/netfilter/xt_CT.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/xt_CT.c b/net/netfilter/xt_CT.c
index b008db0..841cfba 100644
--- a/net/netfilter/xt_CT.c
+++ b/net/netfilter/xt_CT.c
@@ -200,6 +200,7 @@ static int xt_ct_tg_check(const struct xt_tgchk_param *par,
struct xt_ct_target_info_v1 *info)
{
struct nf_conntrack_zone zone;
+ struct nf_conn_help *help;
struct nf_conn *ct;
int ret = -EOPNOTSUPP;
@@ -248,7 +249,7 @@ static int xt_ct_tg_check(const struct xt_tgchk_param *par,
if (info->timeout[0]) {
ret = xt_ct_set_timeout(ct, par, info->timeout);
if (ret < 0)
- goto err3;
+ goto err4;
}
__set_bit(IPS_CONFIRMED_BIT, &ct->status);
nf_conntrack_get(&ct->ct_general);
@@ -256,6 +257,10 @@ static int xt_ct_tg_check(const struct xt_tgchk_param *par,
info->ct = ct;
return 0;
+err4:
+ help = nfct_help(ct);
+ if (help)
+ module_put(help->helper->me);
err3:
nf_ct_tmpl_free(ct);
err2:
--
2.5.5
--
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