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Date: Thu, 10 Oct 2019 14:17:25 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org, linux-can <linux-can@...r.kernel.org>
Cc: davem@...emloft.net, kernel@...gutronix.de,
jhofstee@...tronenergy.com,
Martin Hundebøll <martin@...nix.com>,
Kurt Van Dijck <dev.kurt@...dijck-laurijssen.be>,
Johan Hovold <johan@...nel.org>,
stable <stable@...r.kernel.org>,
Bernd Krumboeck <b.krumboeck@...il.com>,
Wolfgang Grandegger <wg@...ndegger.com>,
Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 04/29] can: usb_8dev: fix use-after-free on disconnect
From: Johan Hovold <johan@...nel.org>
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>
---
drivers/net/can/usb/usb_8dev.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c
index d596a2ad7f78..8fa224b28218 100644
--- 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 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);
}
}
--
2.23.0
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