diff options
| -rw-r--r-- | net/mptcp/subflow.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index a4cc4591bd4e..96f4f2fe50ad 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -1137,6 +1137,12 @@ int mptcp_subflow_create_socket(struct sock *sk, struct socket **new_sock) struct socket *sf; int err; + /* un-accepted server sockets can reach here - on bad configuration + * bail early to avoid greater trouble later + */ + if (unlikely(!sk->sk_socket)) + return -EINVAL; + err = sock_create_kern(net, sk->sk_family, SOCK_STREAM, IPPROTO_TCP, &sf); if (err) |