MFC r352652:

Plumb a memory leak.
Thnanks to Felix Weinrank for finding this issue using fuzz testing
and reporting it for the userland stack:
sctplab/usrsctp#378


git-svn-id: https://svn.freebsd.org/base/stable/12@353034 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f

sys/netinet/sctp_indata.c

@@ -472,6 +472,11 @@ sctp_clean_up_control(struct sctp_tcb *stcb, struct sctp_queued_to_read *control
 		chk->data = NULL;
 		sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
 	}
+	sctp_free_remote_addr(control->whoFrom);
+	if (control->data) {
+		sctp_m_freem(control->data);
+		control->data = NULL;
+	}
 	sctp_free_a_readq(stcb, control);
 }