kern/39294: usb crash during shutdown

[apb%cequrux.com@localhost]

>Number:         39294
>Category:       kern
>Synopsis:       usb crash during shutdown
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Aug 05 16:00:00 +0000 2008
>Originator:     Alan Barrett
>Release:        NetBSD 4.99.71
>Organization:
Not much
>Environment:
System: NetBSD 4.99.71
Architecture: i386
Machine: i386
>Description:
        The system crashed during shutdown.  The panic message was

        panic: kernel diagnostic assertion "(l->l_pflag & LP_INTR) == 0"
        failed, file .../kern_sync.c, line 189

>How-To-Repeat:
        Note that a usb hard disk was plugged in, but not in use in any way.

        shutdown -r now

        panic: kernel diagnostic assertion "(l->l_pflag & LP_INTR) == 0"
        failed, file .../kern_sync.c, line 189
        db{0}> bt
        panic ...
        __kernassert ...
        ltsleep ...
        usbd_transfer ...
        umass_setup_transfer ...
        umass_bbb_state ...
        usb_transfer_complete ...
        ehci_softintr ...
        softint_dispatch ...

>Fix:
        Unknown