diff options
| author | Mat Martineau | 2020-07-28 15:12:00 -0700 |
|---|---|---|
| committer | David S. Miller | 2020-07-28 17:02:41 -0700 |
| commit | 57baaf2875404b555587391608da1625863086fa (patch) | |
| tree | c3e53379430b46a00916652aabd22bee8fd78e04 | |
| parent | 0bac966a1f2ae0e3cbc259c5bb10aab7bbcf8f4b (diff) | |
mptcp: Return EPIPE if sending is shut down during a sendmsg
A MPTCP socket where sending has been shut down should not attempt to
send additional data, since DATA_FIN has already been sent.
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/mptcp/protocol.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index 2891ae8a1028..b3c3dbc89b3f 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -748,6 +748,11 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) restart: mptcp_clean_una(sk); + if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN)) { + ret = -EPIPE; + goto out; + } + wait_for_sndbuf: __mptcp_flush_join_list(msk); ssk = mptcp_subflow_get_send(msk); |