Commit fbb88fad authored Mar 06, 2010 by Stefani Seibold Committed by Greg Kroah-Hartman May 21, 2010

driver-core: fix potential race condition in drivers/base/dd.c



This patch fix a potential race condition in the driver_bound() function
in the file driver/base/dd.c.

The broadcast of the BUS_NOTIFY_BOUND_DRIVER notifier should be done
after adding the new device to the driver list. Otherwise notifier
listener will fail if they use functions like usb_find_interface().

The patch is against kernel 2.6.33. Please merge it.

Signed-off-by: Stefani Seibold <stefani@seibold.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent 6f18ff91

drivers/base/dd.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -40,11 +40,11 @@ static void driver_bound(struct device *dev)
		pr_debug("driver: '%s': %s: bound to device '%s'\n", dev_name(dev),
		__func__, dev->driver->name);

		klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);

		if (dev->bus)
		blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
		BUS_NOTIFY_BOUND_DRIVER, dev);

		klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
		}

		static int driver_sysfs_add(struct device *dev)