diff -u dropbear-2013.60/debian/changelog dropbear-2013.60/debian/changelog
--- dropbear-2013.60/debian/changelog
+++ dropbear-2013.60/debian/changelog
@@ -1,3 +1,10 @@
+dropbear (2013.60-1ubuntu2.2) trusty; urgency=medium
+
+  * Cat of long files breaks dropbear ssh connection (LP: #1497883)
+    Patch can be found in comment #10
+
+ -- Gerald Yang <gerald.yang@canonical.com>  Tue, 02 May 2017 16:57:00 +0800
+
 dropbear (2013.60-1ubuntu2.1) trusty; urgency=medium
 
   * Enable hmac-sha2-256 and hmac-sha2-512 MAC algorithms (LP: #1409798)
only in patch2:
unchanged:
--- dropbear-2013.60.orig/packet.c
+++ dropbear-2013.60/packet.c
@@ -60,14 +60,27 @@
 	struct iovec *iov = NULL;
 	int i;
 	struct Link *l;
+	int iov_max_count;
 #endif
 	
 	TRACE2(("enter write_packet"))
 	dropbear_assert(!isempty(&ses.writequeue));
 
-#ifdef HAVE_WRITEV
-	iov = m_malloc(sizeof(*iov) * ses.writequeue.count);
-	for (l = ses.writequeue.head, i = 0; l; l = l->link, i++)
+#if defined(HAVE_WRITEV) && (defined(IOV_MAX) || defined(UIO_MAXIOV))
+
+#ifndef IOV_MAX
+#define IOV_MAX UIO_MAXIOV
+#endif
+
+	/* Make sure the size of the iov is below the maximum allowed by the OS. */
+	iov_max_count = ses.writequeue.count;
+	if (iov_max_count > IOV_MAX)
+	{
+		iov_max_count = IOV_MAX;
+	}
+
+	iov = m_malloc(sizeof(*iov) * iov_max_count);
+	for (l = ses.writequeue.head, i = 0; i < iov_max_count; l = l->link, i++)
 	{
 		writebuf = (buffer*)l->item;
 		packet_type = writebuf->data[writebuf->len-1];
@@ -79,7 +92,7 @@
 		iov[i].iov_base = buf_getptr(writebuf, len);
 		iov[i].iov_len = len;
 	}
-	written = writev(ses.sock_out, iov, ses.writequeue.count);
+	written = writev(ses.sock_out, iov, iov_max_count);
 	if (written < 0) {
 		if (errno == EINTR) {
 			m_free(iov);
@@ -109,8 +122,7 @@
 	}
 
 	m_free(iov);
-
-#else
+#else /* No writev () */
 	/* Get the next buffer in the queue of encrypted packets to write*/
 	writebuf = (buffer*)examine(&ses.writequeue);
 
@@ -146,7 +158,7 @@
 		buf_incrpos(writebuf, written);
 	}
 
-#endif
+#endif /* writev */
 	now = time(NULL);
 	ses.last_trx_packet_time = now;