* [MPTCP] [PATCH mptcp-next v2 02/12] mptcp: Return EPIPE if sending is shut down during a sendmsg
@ 2020-07-23 0:32 Mat Martineau
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From: Mat Martineau @ 2020-07-23 0:32 UTC (permalink / raw)
To: mptcp
[-- Attachment #1: Type: text/plain, Size: 767 bytes --]
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(a)linux.intel.com>
---
net/mptcp/protocol.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 56cb47439ca3..9e812011c635 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);
--
2.27.0
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2020-07-23 0:32 [MPTCP] [PATCH mptcp-next v2 02/12] mptcp: Return EPIPE if sending is shut down during a sendmsg Mat Martineau
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