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

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commit 7fd25e6fc035f4b04b75bca6d7e8daa069603a76 upstream.

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

Fixes: 7490b008d123 ("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>
This commit is contained in:
Johan Hovold 2019-09-19 14:12:34 +02:00 committed by Greg Kroah-Hartman
parent baba981bfe
commit 481376cc2c
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ieee802154/atusb.c
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@ -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");
}