[PATCH 4.14 22/43] dccp: check sk for closed state in dccp_sendmsg()

4.14-stable review patch. If anyone has any objections, please let me know. -- From: Alexey Kodanev [ Upstream commit 67f93df79aeefc3add4e4b31a752600f834236e2 ] dccp_disconnect() sets 'dp->dccps_hc_tx_ccid' tx handler to NULL, therefore if DCCP

[PATCH 4.14 22/43] dccp: check sk for closed state in dccp_sendmsg()

4.14-stable review patch. If anyone has any objections, please let me know. -- From: Alexey Kodanev [ Upstream commit 67f93df79aeefc3add4e4b31a752600f834236e2 ] dccp_disconnect() sets 'dp->dccps_hc_tx_ccid' tx handler to NULL, therefore if DCCP socket is disconnected and