| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 045/114] ieee802154: atusb: fix use-after-free at disconnect | Date | Thu, 10 Oct 2019 10:35:52 +0200 |
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From: Johan Hovold <johan@kernel.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@vger.kernel.org> # 4.2 Cc: Alexander Aring <alex.aring@gmail.com> Reported-by: syzbot+f4509a9138a1472e7e80@syzkaller.appspotmail.com Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 @@ -1140,10 +1140,11 @@ 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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