| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 13/92] ieee802154: atusb: fix use-after-free at disconnect | Date | Wed, 16 Oct 2019 14:49:46 -0700 |
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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 @@ -838,10 +838,11 @@ 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("atusb_disconnect done\n"); }
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