kern/48954: USB diagconstic message: actlen (-15996) > len (4)

[alnsn%NetBSD.org@localhost]

>Number:         48954
>Category:       kern
>Synopsis:       USB diagconstic message: actlen (-15996) > len (4)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jun 27 09:50:00 +0000 2014
>Originator:     Alexander Nasonov
>Release:        NetBSD 6.99.44
>Organization:
        TNF
>Environment:
        $NetBSD: usb.c,v 1.149 2014/03/16 05:20:29 dholland Exp $
        $NetBSD: usb_mem.c,v 1.64 2013/12/22 18:29:25 mlelstv Exp $
        $NetBSD: usb_pci.c,v 1.7 2008/04/28 20:23:55 martin Exp $
        $NetBSD: usb_quirks.c,v 1.80 2013/11/14 16:33:20 nonaka Exp $
        $NetBSD: usb_subr.c,v 1.196 2014/02/17 07:34:21 skrll Exp $
        $NetBSD: usbdi.c,v 1.160 2013/11/30 12:16:14 skrll Exp $
        $NetBSD: usbdi_util.c,v 1.62 2013/09/26 07:25:31 skrll Exp $
        $NetBSD: if_urtwn.c,v 1.30 2014/05/08 05:59:09 mrg Exp $
System: NetBSD neva 6.99.44 NetBSD 6.99.44 (GENERIC) #1: Thu Jun 26 11:53:57 
BST 2014  
alnsn@neva:/home/alnsn/netbsd-current/src/sys/arch/amd64/compile/obj/GENERIC 
amd64
Architecture: x86_64
Machine: amd64
>Description:
        urtwn driver is a bit unstable for me. I suspect something
        is corrupting memory. This diagnostic message is an extra
        confirmation of my suspicion:

        urtwn0: link state UP (was UNKNOWN)
        urtwn1: link state UP (was UNKNOWN)
        urtwn0: link state DOWN (was UP)
        urtwn0: link state UP (was DOWN)
        urtwn0: link state DOWN (was UP)
        urtwn0: link state UP (was DOWN)
        urtwn0: link state DOWN (was UP)
        usb_transfer_complete: actlen (-15996) > len (4)

        The kernel is built with DIAGNOSTIC, DEBUG, LOCKDEBUG, USB_DEBUG
        and URTWN_DEBUG options.
>How-To-Repeat:
        Not easily reproducable.
>Fix:
        Not known.