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authorBen Warren <ben@skyportsystems.com>2017-03-02 13:36:50 -0800
committerMichael S. Tsirkin <mst@redhat.com>2017-03-15 19:37:19 +0200
commit72d9196f1ef588c19821d0a4fb563836fdb2a0b7 (patch)
treedaaf24fe3ebdadc506c2f22caf1f66714ea2a964
parentd84f714eafedd8bb9d4aaec8b76417bef8e3535e (diff)
downloadfocaccia-qemu-72d9196f1ef588c19821d0a4fb563836fdb2a0b7.tar.gz
focaccia-qemu-72d9196f1ef588c19821d0a4fb563836fdb2a0b7.zip
Bugfix: Handle error if VM Generation ID device not present
This was crashing due to NULL-pointer dereference

QMP Test case:
==============

(QEMU) query-vm-generation-id
{"error": {"class": "GenericError", "desc": "VM Generation ID device not
found"}}

HMP Test case:
==============
virsh # qemu-monitor-command --hmp 3 info vm-generation-id
VM Generation ID device not found

Signed-off-by: Ben Warren <ben@skyportsystems.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
-rw-r--r--hmp.c4
-rw-r--r--hw/acpi/vmgenid.c1
2 files changed, 4 insertions, 1 deletions
diff --git a/hmp.c b/hmp.c
index 261843f7a2..edb8970461 100644
--- a/hmp.c
+++ b/hmp.c
@@ -2608,9 +2608,11 @@ void hmp_hotpluggable_cpus(Monitor *mon, const QDict *qdict)
 
 void hmp_info_vm_generation_id(Monitor *mon, const QDict *qdict)
 {
-    GuidInfo *info = qmp_query_vm_generation_id(NULL);
+    Error *err = NULL;
+    GuidInfo *info = qmp_query_vm_generation_id(&err);
     if (info) {
         monitor_printf(mon, "%s\n", info->guid);
     }
+    hmp_handle_error(mon, &err);
     qapi_free_GuidInfo(info);
 }
diff --git a/hw/acpi/vmgenid.c b/hw/acpi/vmgenid.c
index 744f2847da..7a3ad17d66 100644
--- a/hw/acpi/vmgenid.c
+++ b/hw/acpi/vmgenid.c
@@ -248,6 +248,7 @@ GuidInfo *qmp_query_vm_generation_id(Error **errp)
     Object *obj = find_vmgenid_dev();
 
     if (!obj) {
+        error_setg(errp, "VM Generation ID device not found");
         return NULL;
     }
     vms = VMGENID(obj);