[PATCH 7/9] xen/xenbus: Check before dereferencing it.

[Konrad Rzeszutek Wilk]

. we do the check whether 'xdev' is NULL - but after we have
dereferenced it.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 drivers/xen/xenbus/xenbus_probe_backend.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/xen/xenbus/xenbus_probe_backend.c b/drivers/xen/xenbus/xenbus_probe_backend.c
index 60adf91..331589a 100644
--- a/drivers/xen/xenbus/xenbus_probe_backend.c
+++ b/drivers/xen/xenbus/xenbus_probe_backend.c
@@ -103,10 +103,11 @@ static int xenbus_uevent_backend(struct device *dev,
 		return -ENODEV;
 
 	xdev = to_xenbus_device(dev);
-	bus = container_of(xdev->dev.bus, struct xen_bus_type, bus);
 	if (xdev == NULL)
 		return -ENODEV;
 
+	bus = container_of(xdev->dev.bus, struct xen_bus_type, bus);
+
 	if (add_uevent_var(env, "MODALIAS=xen-backend:%s", xdev->devicetype))
 		return -ENOMEM;
 
-- 
1.7.4.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/