From: Oliver Neukum Date: Fri, 30 Mar 2007 08:52:16 +0000 (+0200) Subject: USB: cypress_cy7c63: race disconnect/sysfs read-write leading to following NULL pointer X-Git-Tag: v2.6.22-rc1~1117^2~34 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=949ce47168a34618c3e24cb7dd4ab52233a4653c;p=karo-tx-linux.git USB: cypress_cy7c63: race disconnect/sysfs read-write leading to following NULL pointer this driver sets intfdata to NULL while it still can be read and happily followed. Signed-off-by: Oliver Neukum Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/misc/cypress_cy7c63.c b/drivers/usb/misc/cypress_cy7c63.c index b63b5f34b2aa..d721380b242d 100644 --- a/drivers/usb/misc/cypress_cy7c63.c +++ b/drivers/usb/misc/cypress_cy7c63.c @@ -246,11 +246,13 @@ static void cypress_disconnect(struct usb_interface *interface) struct cypress *dev; dev = usb_get_intfdata(interface); - usb_set_intfdata(interface, NULL); /* remove device attribute files */ device_remove_file(&interface->dev, &dev_attr_port0); device_remove_file(&interface->dev, &dev_attr_port1); + /* the intfdata can be set to NULL only after the + * device files have been removed */ + usb_set_intfdata(interface, NULL); usb_put_dev(dev->udev);