From: Guillaume Nault <[email protected]> commit af87ae465abdc070de0dc35d6c6a9e7a8cd82987 upstream.
There's no point in checking for duplicate sessions at the beginning of l2tp_nl_cmd_session_create(); the ->session_create() callbacks already return -EEXIST when the session already exists. Furthermore, even if l2tp_session_find() returns NULL, a new session might be created right after the test. So relying on ->session_create() to avoid duplicate session is the only sane behaviour. Signed-off-by: Guillaume Nault <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Giuliano Procida <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/l2tp/l2tp_netlink.c | 5 ----- 1 file changed, 5 deletions(-) --- a/net/l2tp/l2tp_netlink.c +++ b/net/l2tp/l2tp_netlink.c @@ -513,11 +513,6 @@ static int l2tp_nl_cmd_session_create(st goto out; } session_id = nla_get_u32(info->attrs[L2TP_ATTR_SESSION_ID]); - session = l2tp_session_find(net, tunnel, session_id); - if (session) { - ret = -EEXIST; - goto out; - } if (!info->attrs[L2TP_ATTR_PEER_SESSION_ID]) { ret = -EINVAL;
