Author: jceel
Date: Sat Nov 12 01:41:43 2016
New Revision: 308566
URL: https://svnweb.freebsd.org/changeset/base/308566

Log:
  Reserve space for control message payload (currently a port name).
  
  Approved by:  trasz (mentor)
  Sponsored by: iXsystems, Inc.

Modified:
  head/sys/dev/virtio/console/virtio_console.c

Modified: head/sys/dev/virtio/console/virtio_console.c
==============================================================================
--- head/sys/dev/virtio/console/virtio_console.c        Sat Nov 12 00:23:09 
2016        (r308565)
+++ head/sys/dev/virtio/console/virtio_console.c        Sat Nov 12 01:41:43 
2016        (r308566)
@@ -600,7 +600,7 @@ vtcon_ctrl_event_enqueue(struct vtcon_so
 
        sglist_init(&sg, 2, segs);
        error = sglist_append(&sg, control,
-           sizeof(struct virtio_console_control));
+           sizeof(struct virtio_console_control) + VTCON_BULK_BUFSZ);
        KASSERT(error == 0, ("%s: error %d adding control to sglist",
            __func__, error));
 
@@ -633,7 +633,8 @@ vtcon_ctrl_event_requeue(struct vtcon_so
 {
        int error;
 
-       bzero(control, sizeof(struct virtio_console_control));
+       bzero(control, sizeof(struct virtio_console_control) +
+           VTCON_BULK_BUFSZ);
 
        error = vtcon_ctrl_event_enqueue(sc, control);
        KASSERT(error == 0,
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