From 26c346739c8772521b68e4763321d7bdfc49efd4 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Fri, 17 Jan 2014 17:07:54 +0100 Subject: [PATCH 04/11] qdev-monitor: Fix crash when device_add is called with abstract driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit RH-Author: Markus Armbruster Message-id: <1389978479-30595-5-git-send-email-armbru@redhat.com> Patchwork-id: 56787 O-Subject: [PATCH 7.0 qemu-kvm 4/9] qdev-monitor: Fix crash when device_add is called with abstract driver Bugzilla: 669524 RH-Acked-by: Eduardo Habkost RH-Acked-by: Michael S. Tsirkin RH-Acked-by: Marcel Apfelbaum From: Igor Mammedov 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. Cc: qemu-stable@nongnu.org Signed-off-by: Igor Mammedov Signed-off-by: Andreas Färber (cherry picked from commit 2fa4e56d88aa0039062bbc7f9a88e9f90c77ed94) Signed-off-by: Markus Armbruster --- qdev-monitor.c | 6 ++++++ 1 file changed, 6 insertions(+) Signed-off-by: Miroslav Rezanina --- qdev-monitor.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/qdev-monitor.c b/qdev-monitor.c index 5b45d02..f313a94 100644 --- a/qdev-monitor.c +++ b/qdev-monitor.c @@ -482,6 +482,12 @@ DeviceState *qdev_device_add(QemuOpts *opts) return NULL; } + if (object_class_is_abstract(oc)) { + qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", + "non-abstract device type"); + return NULL; + } + dc = DEVICE_CLASS(oc); /* find bus */ -- 1.7.1