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can: usb_8dev: fix use-after-free on disconnect

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commit 3759739426186a924675651b388d1c3963c5710e upstream.

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

Fixes: 0024d8ad16 ("can: usb_8dev: Add support for USB2CAN interface from 8 devices")
Cc: stable <stable@vger.kernel.org>     # 3.9
Cc: Bernd Krumboeck <b.krumboeck@gmail.com>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2019-10-01 12:29:14 +02:00 • committed by Greg Kroah-Hartman
parent 119f371c09
commit 4096b1402e
1 changed files with 1 additions and 2 deletions
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3
drivers/net/can/usb/usb_8dev.c
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@ -1010,9 +1010,8 @@ static void usb_8dev_disconnect(struct usb_interface *intf)
netdev_info(priv->netdev, "device disconnected\n");
unregister_netdev(priv->netdev);
free_candev(priv->netdev);
unlink_all_urbs(priv);
free_candev(priv->netdev);
}
}