From 949ce47168a34618c3e24cb7dd4ab52233a4653c Mon Sep 17 00:00:00 2001 From: Oliver Neukum <oneukum@suse.de> Date: Fri, 30 Mar 2007 10:52:16 +0200 Subject: [PATCH] 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 <oneukum@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- drivers/usb/misc/cypress_cy7c63.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/misc/cypress_cy7c63.c b/drivers/usb/misc/cypress_cy7c63.c index b63b5f34b2aa5..d721380b242d6 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); -- GitLab