[libvirt] [libvirt-glib] Check arguments to public GVirConfigObject methods
Daniel P. Berrange
berrange at redhat.com
Mon May 21 12:21:42 UTC 2012
On Mon, May 21, 2012 at 02:14:19PM +0200, Christophe Fergeau wrote:
> GVirConfigObject public methods don't have g_return_if_fail checks
> on their arguments. It happens that GNOME Boxes tries to call
> gvir_config_object_to_xml with a NULL GVirConfigObject causing a
> crash https://bugzilla.gnome.org/show_bug.cgi?id=676308
> While GNOME Boxes needs to be fixed not to pass an invalid value
> to gvir_config_object_to_xml, it's better if libvirt-gconfig sanity
> checks the argument it is passed by the caller before using them.
> ---
> libvirt-gconfig/libvirt-gconfig-object.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/libvirt-gconfig/libvirt-gconfig-object.c b/libvirt-gconfig/libvirt-gconfig-object.c
> index 8286bcb..1474393 100644
> --- a/libvirt-gconfig/libvirt-gconfig-object.c
> +++ b/libvirt-gconfig/libvirt-gconfig-object.c
> @@ -191,11 +191,16 @@ static void gvir_config_object_init(GVirConfigObject *conn)
> void gvir_config_object_validate(GVirConfigObject *config,
> GError **err)
> {
> - GVirConfigObjectPrivate *priv = config->priv;
> + GVirConfigObjectPrivate *priv;
> xmlRelaxNGParserCtxtPtr rngParser = NULL;
> xmlRelaxNGPtr rng = NULL;
> xmlRelaxNGValidCtxtPtr rngValid = NULL;
>
> + g_return_if_fail(GVIR_CONFIG_IS_OBJECT(config));
> + g_return_if_fail(err == NULL || *err == NULL);
> +
> + priv = config->priv;
> +
> xmlSetGenericErrorFunc(NULL, gvir_xml_generic_error_nop);
> xmlSetStructuredErrorFunc(NULL, gvir_xml_structured_error_nop);
>
> @@ -256,13 +261,16 @@ void gvir_config_object_validate(GVirConfigObject *config,
>
> gchar *gvir_config_object_to_xml(GVirConfigObject *config)
> {
> + g_return_val_if_fail(GVIR_CONFIG_IS_OBJECT(config), NULL);
> +
> return gvir_config_xml_node_to_string(config->priv->node);
> }
>
> const gchar *gvir_config_object_get_schema(GVirConfigObject *config)
> {
> - GVirConfigObjectPrivate *priv = config->priv;
> - return priv->schema;
> + g_return_val_if_fail(GVIR_CONFIG_IS_OBJECT(config), NULL);
> +
> + return config->priv->schema;
> }
>
> /* FIXME: will we always have one xmlNode per GConfig object? */
ACK
Daniel
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