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| author | Oliver Neukum <oliver@neukum.org> | 2007-10-28 08:21:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-11-28 13:58:33 -0800 |
| commit | ed206ec9ab398e1c3756ff0eb9507db1d009e65f (patch) | |
| tree | d13e50319c8a0f870ffe04b561e7688ea44deb1a | |
| parent | 7ced46c3ad1dfaaabf9ec6c98cbb0a48e080fb11 (diff) | |
| download | op-kernel-dev-ed206ec9ab398e1c3756ff0eb9507db1d009e65f.zip op-kernel-dev-ed206ec9ab398e1c3756ff0eb9507db1d009e65f.tar.gz | |
USB: fix usbled disconnect read race #2
usbled has a race where show methods for attributes in sysfs can
follow a NULL pointer during disconnect. The correct ordering fixes
it.
Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/misc/usbled.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/misc/usbled.c b/drivers/usb/misc/usbled.c index 49c5c5c..06cb719 100644 --- a/drivers/usb/misc/usbled.c +++ b/drivers/usb/misc/usbled.c @@ -144,12 +144,14 @@ static void led_disconnect(struct usb_interface *interface) struct usb_led *dev; dev = usb_get_intfdata (interface); - usb_set_intfdata (interface, NULL); device_remove_file(&interface->dev, &dev_attr_blue); device_remove_file(&interface->dev, &dev_attr_red); device_remove_file(&interface->dev, &dev_attr_green); + /* first remove the files, then set the pointer to NULL */ + usb_set_intfdata (interface, NULL); + usb_put_dev(dev->udev); kfree(dev); |
