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Date: Thu, 10 Oct 2019 10:35:45 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Alexander Aring <alex.aring@...il.com>,
syzbot+f4509a9138a1472e7e80@...kaller.appspotmail.com,
Johan Hovold <johan@...nel.org>,
Stefan Schmidt <stefan@...enfreihafen.org>
Subject: [PATCH 5.3 084/148] ieee802154: atusb: fix use-after-free at disconnect
From: Johan Hovold <johan@...nel.org>
commit 7fd25e6fc035f4b04b75bca6d7e8daa069603a76 upstream.
The disconnect callback was accessing the hardware-descriptor private
data after having having freed it.
Fixes: 7490b008d123 ("ieee802154: add support for atusb transceiver")
Cc: stable <stable@...r.kernel.org> # 4.2
Cc: Alexander Aring <alex.aring@...il.com>
Reported-by: syzbot+f4509a9138a1472e7e80@...kaller.appspotmail.com
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Stefan Schmidt <stefan@...enfreihafen.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/ieee802154/atusb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ieee802154/atusb.c
+++ b/drivers/net/ieee802154/atusb.c
@@ -1137,10 +1137,11 @@ static void atusb_disconnect(struct usb_
ieee802154_unregister_hw(atusb->hw);
+ usb_put_dev(atusb->usb_dev);
+
ieee802154_free_hw(atusb->hw);
usb_set_intfdata(interface, NULL);
- usb_put_dev(atusb->usb_dev);
pr_debug("%s done\n", __func__);
}
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