From: Johan Hovold <johan@kernel.org>
To: Wolfgang Grandegger <wg@grandegger.com>,
Marc Kleine-Budde <mkl@pengutronix.de>
Cc: "David S. Miller" <davem@davemloft.net>,
linux-can@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
Johan Hovold <johan@kernel.org>, stable <stable@vger.kernel.org>,
Bernd Krumboeck <b.krumboeck@gmail.com>
Subject: [PATCH 2/2] can: usb_8dev: fix use-after-free on disconnect
Date: Tue, 1 Oct 2019 12:29:14 +0200 [thread overview]
Message-ID: <20191001102914.4567-3-johan@kernel.org> (raw)
In-Reply-To: <20191001102914.4567-1-johan@kernel.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@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>
---
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
next prev parent reply other threads:[~2019-10-01 10:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-01 10:29 [PATCH 0/2] can: fix use-after-free on USB disconnect Johan Hovold
2019-10-01 10:29 ` [PATCH 1/2] can: mcba_usb: fix use-after-free on disconnect Johan Hovold
2019-10-01 10:29 ` Johan Hovold [this message]
2019-10-04 20:45 ` [PATCH 0/2] can: fix use-after-free on USB disconnect Marc Kleine-Budde
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