kern/45833: Occasional crash of 5.99.59: SPL NOT LOWERED ON TRAP EXIT

[Aleksej Saushev <asau%inbox.ru@localhost>]

>Number:         45833
>Category:       kern
>Synopsis:       Occasional crash of 5.99.59: SPL NOT LOWERED ON TRAP EXIT
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 14 07:50:00 +0000 2012
>Originator:     asau%inbox.ru@localhost
>Release:        NetBSD 5.99.59
>Organization:
>Environment:
System: NetBSD asaushev 5.99.59 NetBSD 5.99.59 (GENERIC) #1: Wed Jan 11 
11:21:15 MSK 2012
Architecture: i386
Machine: i386
>Description:
        NetBSD 5.99.56-59 occasionally crashes producing the following (or 
similar):

$ crash -M netbsd.44.core -N netbsd.44
Crash version 5.99.59, image version 5.99.59.
System panicked: SPL NOT LOWERED ON TRAP EXIT

Backtrace from time of crash is available.
crash> bt
_KERNEL_OPT_NAPMBIOS(e0ed4a80,104,c05ad453,8,5,0,0,e0f00ce8,0,0) at 0
_KERNEL_OPT_IPX(104,0,ffff,c0c06e8f,c07a7995,e0ed4a80,bfbfc668,c010d01f,e0f00d08
,b3) at e0f00d48
vpanic(c010d0c9,e0f00d48,0,0,4,8c,e0f00cfc,c010d0b8,c010d0c9,b3) at c07a7bea
printf_nolog(c010d0c9,b3,ab,bfbf0023,8060023,0,bfa00000,bfbfc668,bb9da178,0) at 
c
07a7c8f
Bad frame pointer: 0xe0f00cfc

        It may be that the following factors contribute: X11, mplayer
        At least I haven't seen the crash without running mplayer,
        and crashes frequently occur when pausing mplayer.
>How-To-Repeat:
        Run NetBSD 5.99.59 for some time with X11 and mplayer,
        pause music (or video), continue, repeat again. Wait few days.
>Fix:
        None.