kern/39324: kernel diagnostic assertion "l->l_stat != LSZOMB" failed

[Bernd Ernesti <pr200813%veego.de@localhost>]

>Number:         39324
>Category:       kern
>Synopsis:       kernel diagnostic assertion "l->l_stat != LSZOMB" failed
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Aug 09 09:20:00 +0000 2008
>Originator:     Bernd Ernesti
>Release:        NetBSD 4.99.71
>Organization:
        
>Environment:
System: NetBSD 4.99.71
Architecture: i386
Machine: i386
>Description:

panic: kernel diagnostic assertion "l->l_stat != LSZOMB" failed: file 
"/src/sys/kern/kern_lwp.c", line 1326
fatal breakpoint trap in supervisor mode
trap type 1 code 0 eip c051034c cs 8 eflags 246 cr2 bbae9000 ilevel 0
Stopped in pid 11852.1 (find) at        netbsd:breakpoint+0x4:  popl    %ebp

db{1}> mach cpu 0
using CPU 0
db{1}> bt
x86_stihlt(cc1c7be0,0,c0420f17,cc1c7be0,0,0,c08a4088,cc1c7be0,c0419e10,cc1c7be0)
 at netbsd:x86_stihlt+0x5
idle_loop(cc1c7be0,0,c01002cd,0,c01002cd,0,0,0,0,0) at netbsd:idle_loop+0x176
db{1}> mach cpu 1
using CPU 1
db{1}> bt
breakpoint(c084082f,d0728a08,c2f2e000,0,0,cc1bb254,d0728a1c,c040bbe0,d0205480,1)
 at netbsd:breakpoint+0x4
panic(c088d1a4,c07e6bbd,c0828ff5,c0828fc3,52e,c32526c0,d0728a3c,c041fd54,c07e6bbd,c0828fc3)
 at netbsd:panic+0x1b8
__kernassert(c07e6bbd,c0828fc3,52e,c0828ff5,d35ea730,d046fd80,d0728abc,c0354243,d046fd80,d0728aac)
 at netbsd:__kernassert+0x39
lwp_addref(d046fd80,d0728aac,3,c035485f,c089f5f4,1,0,d0728b88,d0205480,16d) at 
netbsd:lwp_addref+0xb4
procfs_lookup(d0728ad4,1,0,cc1bb03c,c06eea40,d35ea730,d0728c14,d0728c28,d35ea730,d35ea730)
 at netbsd:procfs_lookup+0x263
VOP_LOOKUP(d35ea730,d0728c14,d0728c28,c049f330,d0728b1c,0,d0728b4c,c044f78f,20,0)
 at netbsd:VOP_LOOKUP+0x8c
lookup(d0728c00,20002,400,d0728c1c,d0205480,16d,d0728b9c,c0491628,d0728c1c,d0205480)
 at netbsd:lookup+0x20b
namei(d0728c00,d020201c,d0728c0c,c04a521b,d35ea7d0,6,d0728c3c,bb91a6cc,0,0) at 
netbsd:namei+0x145
do_sys_stat(bb91a6cc,0,d0728c70,1,d0728c80,1,15,c0412060,d06dfcc8,1) at 
netbsd:do_sys_stat+0x37
sys___lstat30(d06d9020,d0728d00,d0728d28,bbae9000,bbae9000,d056e0d8,1,bb91a6cc,bb91a6d0,0)
 at netbsd:sys___lstat30+0x29
syscall(d0728d48,b3,ab,1f,1f,bb91a6d0,bb91a680,bfbfe5d8,bbbc2f58,bb91a680) at 
netbsd:syscall+0xab

>How-To-Repeat:
        This happend while installating a package.
        In the '=> Generating pre-install file lists' stage.
>Fix: