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authorMarc-André Lureau <marcandre.lureau@redhat.com>2018-05-31 21:51:17 +0200
committerGerd Hoffmann <kraxel@redhat.com>2018-06-12 12:07:30 +0200
commit265b578c584b1a86c7028790deaa2f4392dd0a65 (patch)
tree193f6032791f9c2836fb9508cbbd755a1fab25b7 /hw/core
parentf3d58385a6d3d82f65db602c5506e2d3d8c82394 (diff)
downloadfocaccia-qemu-265b578c584b1a86c7028790deaa2f4392dd0a65.tar.gz
focaccia-qemu-265b578c584b1a86c7028790deaa2f4392dd0a65.zip
object: fix OBJ_PROP_LINK_UNREF_ON_RELEASE ambivalence
A link property can be set during creation, with
object_property_add_link() and later with object_property_set_link().

add_link() doesn't add a reference to the target object, while
set_link() does.

Furthemore, OBJ_PROP_LINK_UNREF_ON_RELEASE flags, set during add_link,
says whether a reference must be released when the property is destroyed.
This can lead to leaks if the property was later set_link(), as the
added reference is never released.

Instead, rename OBJ_PROP_LINK_UNREF_ON_RELEASE to OBJ_PROP_LINK_STRONG
and use that has an indication on how the link handle reference
management in set_link().

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20180531195119.22021-3-marcandre.lureau@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/core')
-rw-r--r--hw/core/qdev-properties.c2
-rw-r--r--hw/core/qdev.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 989778ab7f..35072dec1e 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -1308,7 +1308,7 @@ static void create_link_property(Object *obj, Property *prop, Error **errp)
     object_property_add_link(obj, prop->name, prop->link_type,
                              child,
                              qdev_prop_allow_set_link_before_realize,
-                             OBJ_PROP_LINK_UNREF_ON_RELEASE,
+                             OBJ_PROP_LINK_STRONG,
                              errp);
 }
 
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index ffec461791..cf0db4b6da 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -409,7 +409,7 @@ void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
         object_property_add_link(OBJECT(dev), propname, TYPE_IRQ,
                                  (Object **)&pins[i],
                                  object_property_allow_set_link,
-                                 OBJ_PROP_LINK_UNREF_ON_RELEASE,
+                                 OBJ_PROP_LINK_STRONG,
                                  &error_abort);
         g_free(propname);
     }