Commit 481376cc authored Sep 19, 2019 by Johan Hovold Committed by Greg Kroah-Hartman Oct 11, 2019

ieee802154: atusb: fix use-after-free at disconnect



commit 7fd25e6fc035f4b04b75bca6d7e8daa069603a76 upstream.

The disconnect callback was accessing the hardware-descriptor private
data after having having freed it.

Fixes: 7490b008 ("ieee802154: add support for atusb transceiver")
Cc: stable <stable@vger.kernel.org>     # 4.2
Cc: Alexander Aring <alex.aring@gmail.com>
Reported-by:  <syzbot+f4509a9138a1472e7e80@syzkaller.appspotmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent baba981b

drivers/net/ieee802154/atusb.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -907,10 +907,11 @@ static void atusb_disconnect(struct usb_interface *interface)

		ieee802154_unregister_hw(atusb->hw);

		usb_put_dev(atusb->usb_dev);

		ieee802154_free_hw(atusb->hw);

		usb_set_intfdata(interface, NULL);
		usb_put_dev(atusb->usb_dev);

		pr_debug("atusb_disconnect done\n");
		}