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Subject[PATCH] ieee802154: atusb: fix use-after-free at disconnect
Date
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>
---

#syz test: https://github.com/google/kasan.git f0df5c1b

drivers/net/ieee802154/atusb.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ieee802154/atusb.c b/drivers/net/ieee802154/atusb.c
index ceddb424f887..0dd0ba915ab9 100644
--- a/drivers/net/ieee802154/atusb.c
+++ b/drivers/net/ieee802154/atusb.c
@@ -1137,10 +1137,11 @@ static void atusb_disconnect(struct usb_interface *interface)

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__);
}
--
2.23.0
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