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virtio-serial: save/load: Ensure we have hot-plugged ports instantiated 

If some ports that were hot-plugged on the source are not available on
the destination, fail migration instead of trying to deref a NULL
pointer.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reported-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Amit Shah 2010-04-27 18:03:57 +05:30 committed by Anthony Liguori
parent 295587f747
commit 16af2e3c35
1 changed files with 7 additions and 0 deletions
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7
hw/virtio-serial-bus.c
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@ -451,6 +451,13 @@ static int virtio_serial_load(QEMUFile *f, void *opaque, int version_id)
id = qemu_get_be32(f);
port = find_port_by_id(s, id);
if (!port) {
/*
* The requested port was hot-plugged on the source but we
* don't have it
*/
return -EINVAL;
}
port->guest_connected = qemu_get_byte(f);
}