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[3/9] virtio-serial: save/load: Ensure we have hot-plugged ports instantiated

Message ID 1268999926-29560-4-git-send-email-amit.shah@redhat.com
State New
Headers show

Commit Message

Amit Shah March 19, 2010, 11:58 a.m. UTC 
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>
---
 hw/virtio-serial-bus.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
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Patch

diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index f43d1fc..830eb75 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -450,6 +450,13 @@  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);
     }