lkml.org 
[lkml]   [2019]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 4.14 26/61] ieee802154: atusb: fix use-after-free at disconnect
    Date
    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
    @@ -907,10 +907,11 @@ 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");
    }

    \
     
     \ /
      Last update: 2019-10-10 10:52    [W:6.143 / U:0.632 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site