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can: mcba_usb: fix use-after-free on disconnect

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The driver was accessing its driver data after having freed it.

Fixes: 51f3baad7d ("can: mcba_usb: Add support for Microchip CAN BUS Analyzer")
Cc: stable <stable@vger.kernel.org>     # 4.12
Cc: Remigiusz Kołłątaj <remigiusz.kollataj@mobica.com>
Reported-by: syzbot+e29b17e5042bbc56fae9@syzkaller.appspotmail.com
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Johan Hovold 2019-10-01 12:29:13 +02:00 committed by Marc Kleine-Budde
parent fb5be6a7b4
commit 4d6636498c
1 changed files with 1 additions and 2 deletions
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3
drivers/net/can/usb/mcba_usb.c
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@ -876,9 +876,8 @@ static void mcba_usb_disconnect(struct usb_interface *intf)
netdev_info(priv->netdev, "device disconnected\n");
unregister_candev(priv->netdev);
free_candev(priv->netdev);
mcba_urb_unlink(priv);
free_candev(priv->netdev);
}
static struct usb_driver mcba_usb_driver = {