From: Igor Mammedov <imamm...@redhat.com>
QEMU will crash when device-memory-region-size property is read if
ms->device_memory
wasn't initialized yet.
Crash can be reproduced with:
$QEMU -preconfig -qmp unix:qmp_socket,server,nowait &
./scripts/qmp/qom-get -s qmp_socket /machine.device-memory-region-size
Instead of crashing return 0 if ms->device_memory hasn't been initialized.
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
Message-Id: <20190624090200.5383-1-imamm...@redhat.com>
Signed-off-by: Eduardo Habkost <ehabk...@redhat.com>
---
hw/i386/pc.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 9921ce4f5e..9b953eeeea 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -2489,7 +2489,11 @@ pc_machine_get_device_memory_region_size(Object *obj,
Visitor *v,
Error **errp)
{
MachineState *ms = MACHINE(obj);
- int64_t value = memory_region_size(&ms->device_memory->mr);
+ int64_t value = 0;
+
+ if (ms->device_memory) {
+ value = memory_region_size(&ms->device_memory->mr);
+ }
visit_type_int(v, name, &value, errp);
}
--
2.18.0.rc1.1.g3f1ff2140
