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| author | Eduardo Habkost <ehabkost@redhat.com> | 2016-01-28 12:22:35 -0200 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2016-06-17 10:42:21 -0300 |
| commit | f9a8b5530d438f836f9697639814f585aaec554d (patch) | |
| tree | 22d2d7b648d2fc15f4848e486b8a340f170edaa2 | |
| parent | 4acc8fdfd315f7ee474bea28fcbcc4dca9717d13 (diff) | |
| download | qemu-f9a8b5530d438f836f9697639814f585aaec554d.zip qemu-f9a8b5530d438f836f9697639814f585aaec554d.tar.gz qemu-f9a8b5530d438f836f9697639814f585aaec554d.tar.bz2 | |
qdev: Use GList for global properties
If the same GlobalProperty struct is registered twice, the list
entry gets corrupted, making tqe_next points to itself, and
qdev_prop_set_globals() gets stuck in a loop. The bug can be
easily reproduced by running:
$ qemu-system-x86_64 -rtc-td-hack -rtc-td-hack
Change global_props to use GList instead of queue.h, making the
code simpler and able to deal with properties being registered
twice.
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
| -rw-r--r-- | hw/core/qdev-properties.c | 15 | ||||
| -rw-r--r-- | include/hw/qdev-core.h | 1 |
2 files changed, 8 insertions, 8 deletions
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c index 737d29c..e3b2184 100644 --- a/hw/core/qdev-properties.c +++ b/hw/core/qdev-properties.c @@ -1020,12 +1020,11 @@ void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value) *ptr = value; } -static QTAILQ_HEAD(, GlobalProperty) global_props = - QTAILQ_HEAD_INITIALIZER(global_props); +static GList *global_props; void qdev_prop_register_global(GlobalProperty *prop) { - QTAILQ_INSERT_TAIL(&global_props, prop, next); + global_props = g_list_append(global_props, prop); } void qdev_prop_register_global_list(GlobalProperty *props) @@ -1039,10 +1038,11 @@ void qdev_prop_register_global_list(GlobalProperty *props) int qdev_prop_check_globals(void) { - GlobalProperty *prop; + GList *l; int ret = 0; - QTAILQ_FOREACH(prop, &global_props, next) { + for (l = global_props; l; l = l->next) { + GlobalProperty *prop = l->data; ObjectClass *oc; DeviceClass *dc; if (prop->used) { @@ -1073,9 +1073,10 @@ int qdev_prop_check_globals(void) static void qdev_prop_set_globals_for_type(DeviceState *dev, const char *typename) { - GlobalProperty *prop; + GList *l; - QTAILQ_FOREACH(prop, &global_props, next) { + for (l = global_props; l; l = l->next) { + GlobalProperty *prop = l->data; Error *err = NULL; if (strcmp(typename, prop->driver) != 0) { diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index 1ce02b2..24aa0a7 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -266,7 +266,6 @@ typedef struct GlobalProperty { const char *value; bool user_provided; bool used; - QTAILQ_ENTRY(GlobalProperty) next; } GlobalProperty; /*** Board API. This should go away once we have a machine config file. ***/ |