3.2.95-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Guillaume Nault <g.nault@xxxxxxxxxxxx>
commit 8c0e421525c9eb50d68e8f633f703ca31680b746 upstream.
We need to make sure the tunnel is not going to be destroyed by
l2tp_tunnel_destruct() concurrently.
Fixes: 309795f4bec2 ("l2tp: Add netlink control API for L2TP")
Signed-off-by: Guillaume Nault <g.nault@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
net/l2tp/l2tp_netlink.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -211,8 +211,8 @@ static int l2tp_nl_cmd_tunnel_modify(str
}
tunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);
- tunnel = l2tp_tunnel_find(net, tunnel_id);
- if (tunnel == NULL) {
+ tunnel = l2tp_tunnel_get(net, tunnel_id);
+ if (!tunnel) {
ret = -ENODEV;
goto out;
}
@@ -220,6 +220,8 @@ static int l2tp_nl_cmd_tunnel_modify(str
if (info->attrs[L2TP_ATTR_DEBUG])
tunnel->debug = nla_get_u32(info->attrs[L2TP_ATTR_DEBUG]);
+ l2tp_tunnel_dec_refcount(tunnel);
+
out:
return ret;
}