From: Marc Kleine-Budde <mkl@pengutronix.de>
To: netdev@vger.kernel.org, linux-can <linux-can@vger.kernel.org>
Cc: davem@davemloft.net, kernel@pengutronix.de,
jhofstee@victronenergy.com,
"Martin Hundebøll" <martin@geanix.com>,
"Kurt Van Dijck" <dev.kurt@vandijck-laurijssen.be>,
"Johan Hovold" <johan@kernel.org>,
stable <stable@vger.kernel.org>,
"Remigiusz Kołłątaj" <remigiusz.kollataj@mobica.com>,
syzbot+e29b17e5042bbc56fae9@syzkaller.appspotmail.com,
"Marc Kleine-Budde" <mkl@pengutronix.de>
Subject: [PATCH 03/29] can: mcba_usb: fix use-after-free on disconnect
Date: Thu, 10 Oct 2019 14:17:24 +0200 [thread overview]
Message-ID: <20191010121750.27237-4-mkl@pengutronix.de> (raw)
In-Reply-To: <20191010121750.27237-1-mkl@pengutronix.de>
From: Johan Hovold <johan@kernel.org>
The driver was accessing its driver data after having freed it.
Fixes: 51f3baad7de9 ("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>
---
drivers/net/can/usb/mcba_usb.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c
index 19a702ac49e4..21faa2ec4632 100644
--- a/drivers/net/can/usb/mcba_usb.c
+++ b/drivers/net/can/usb/mcba_usb.c
@@ -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 = {
--
2.23.0
next prev parent reply other threads:[~2019-10-10 12:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191010121750.27237-1-mkl@pengutronix.de>
2019-10-10 12:17 ` [PATCH 01/29] can: dev: add missing of_node_put() after calling of_get_child_by_name() Marc Kleine-Budde
2019-10-10 12:17 ` [PATCH 02/29] can: gs_usb: gs_can_open(): prevent memory leak Marc Kleine-Budde
2019-10-10 12:17 ` Marc Kleine-Budde [this message]
2019-10-10 12:17 ` [PATCH 04/29] can: usb_8dev: fix use-after-free on disconnect Marc Kleine-Budde
2019-10-10 12:17 ` [PATCH 05/29] can: flexcan: disable completely the ECC mechanism Marc Kleine-Budde
2019-10-10 12:17 ` [PATCH 06/29] can: peak_usb: fix a potential out-of-sync while decoding packets Marc Kleine-Budde
2019-10-10 12:17 ` [PATCH 08/29] can: c_can: c_can_poll(): only read status register after status IRQ Marc Kleine-Budde
2019-10-10 12:17 ` [PATCH 12/29] can: rx-offload: can_rx_offload_queue_sorted(): fix error handling, avoid skb mem leak Marc Kleine-Budde
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