user is able to crash running QEMU when following monitor
command is called:
device_add intel-hda-generic
crash is caused by assertion in object_initialize_with_type()
when type is abstract.
Checking if type is abstract before instance is created in
qdev_device_add() allows to prevent crash on incorrect user input.
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
qdev-monitor.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/qdev-monitor.c b/qdev-monitor.c
index 410cdcb..bb2e1b6 100644
--- a/qdev-monitor.c
+++ b/qdev-monitor.c
@@ -472,6 +472,12 @@ DeviceState *qdev_device_add(QemuOpts *opts)
return NULL;
}
+ if (object_class_is_abstract(obj)) {
+ qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver",
+ "non-abstract device type");
+ return NULL;
+ }
+
k = DEVICE_CLASS(obj);
/* find bus */
--
1.7.1
