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Date: Mon, 11 Nov 2019 19:27:34 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Bernd Krumboeck <b.krumboeck@...il.com>,
Wolfgang Grandegger <wg@...ndegger.com>,
Johan Hovold <johan@...nel.org>,
Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 5.3 072/193] can: usb_8dev: fix use-after-free on disconnect
From: Johan Hovold <johan@...nel.org>
commit 3759739426186a924675651b388d1c3963c5710e upstream.
The driver was accessing its driver data after having freed it.
Fixes: 0024d8ad1639 ("can: usb_8dev: Add support for USB2CAN interface from 8 devices")
Cc: stable <stable@...r.kernel.org> # 3.9
Cc: Bernd Krumboeck <b.krumboeck@...il.com>
Cc: Wolfgang Grandegger <wg@...ndegger.com>
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/can/usb/usb_8dev.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/net/can/usb/usb_8dev.c
+++ b/drivers/net/can/usb/usb_8dev.c
@@ -996,9 +996,8 @@ static void usb_8dev_disconnect(struct u
netdev_info(priv->netdev, "device disconnected\n");
unregister_netdev(priv->netdev);
- free_candev(priv->netdev);
-
unlink_all_urbs(priv);
+ free_candev(priv->netdev);
}
}
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