kern/46193: 6.0_BETA crash

[cheusov%tut.by@localhost]

>Number:         46193
>Category:       kern
>Synopsis:       6.0_BETA crash
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Mar 14 15:25:00 +0000 2012
>Originator:     Aleksey Cheusov
>Release:        NetBSD 6.0_BETA
>Organization:
>Environment:
System: NetBSD work.imb.invention.com 6.0_BETA NetBSD 6.0_BETA (GENERIC) #0: 
Mon Mar 12 17:25:05 FET 2012 
cheusov%work.imb.invention.com@localhost:/srv/obj-current/sys/arch/i386/compile/GENERIC
 i386
Architecture: i386
Machine: i386
>Description:
NetBSD-6.0_BETA crashes. Stacktrace is below.
Two days old netbsd-6 sources.

Kernel is mostly GENERIC. Changes:
  options        DEBUG
  makeoptions    DEBUG="-g"

#0  0xc05c4a03 in maybe_dump (howto=260) at 
/srv/src_netbsd_current/sys/arch/i386/i386/machdep.c:878
878                     dumpsys();
#0  0xc05c4a03 in maybe_dump (howto=260) at 
/srv/src_netbsd_current/sys/arch/i386/i386/machdep.c:878
#1  cpu_reboot (howto=260, bootstr=0x0) at 
/srv/src_netbsd_current/sys/arch/i386/i386/machdep.c:903
#2  0xc07c1c1a in vpanic (fmt=0xc0c174a8 "kmem_free(%p, %zu) != allocated size 
%zu", ap=0xf3a46968 "\210\034\237I\371") at 
/srv/src_netbsd_current/sys/kern/subr_prf.c:308
#3  0xc07c1cbf in panic (fmt=0xc0c174a8 "kmem_free(%p, %zu) != allocated size 
%zu") at /srv/src_netbsd_current/sys/kern/subr_prf.c:205
#4  0xc07b881a in kmem_size_check (sz=<unavailable>, p=0xcd9f1c80) at 
/srv/src_netbsd_current/sys/kern/subr_kmem.c:439
#5  kmem_intr_free (p=0xcd9f1c80, size=248) at 
/srv/src_netbsd_current/sys/kern/subr_kmem.c:236
#6  0xc08ad91a in amap_extend (entry=0xcba81900, addsize=36864, flags=2) at 
/srv/src_netbsd_current/sys/uvm/uvm_amap.c:616
#7  0xc08bcad2 in uvm_mapent_trymerge (map=0xc59c487c, entry=0xca802dc8, 
flags=1) at /srv/src_netbsd_current/sys/uvm/uvm_map.c:4481
#8  0xc08ad1de in amap_copy (map=0xc59c487c, entry=0xca802dc8, flags=2, 
startva=<optimized out>, endva=<optimized out>) at 
/srv/src_netbsd_current/sys/uvm/uvm_amap.c:812
#9  0xc08b4e74 in uvmfault_amapcopy (ufi=<optimized out>) at 
/srv/src_netbsd_current/sys/uvm/uvm_fault.c:237
#10 uvm_fault_check (maxprot=false, ranons=<optimized out>, flt=0xf3a46c40, 
ufi=0xf3a46c60) at /srv/src_netbsd_current/sys/uvm/uvm_fault.c:1022
#11 uvm_fault_internal (orig_map=0xc59c487c, vaddr=2037485568, access_type=2, 
fault_flag=0) at /srv/src_netbsd_current/sys/uvm/uvm_fault.c:877
#12 0xc081df28 in trap (frame=0xf3a46d48) at 
/srv/src_netbsd_current/sys/arch/i386/i386/trap.c:678
#13 0xc010d08f in ?? ()

>How-To-Repeat:
No idea. This happens after two days of work.
>Fix:
unknown