panic: worklist_remove: 0xca327d00 allocdirect(0x20005) not on list

Hi,
	I ran into this panic when doing a crypto intensive workload while running a buildworld in the background. I haven’t seen this panic before.
	My world and kernel were build recently (in the past 3 days).
Thanks!
-Garrett

# kgdb /boot/kernel/kernel vmcore.0 
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Unread portion of the kernel message buffer:
panic: worklist_remove: 0xca327d00 allocdirect(0x20005) not on list
cpuid = 2
KDB: enter: panic

Reading symbols from /usr/local/lib/vmware-tools/modules/drivers/vmmemctl.ko...done.
Loaded symbols for /usr/local/lib/vmware-tools/modules/drivers/vmmemctl.ko
Reading symbols from /usr/local/lib/vmware-tools/modules/drivers/vmxnet.ko...done.
Loaded symbols for /usr/local/lib/vmware-tools/modules/drivers/vmxnet.ko
Reading symbols from /usr/local/lib/vmware-tools/modules/drivers/vmblock.ko...done.
Loaded symbols for /usr/local/lib/vmware-tools/modules/drivers/vmblock.ko
Reading symbols from /usr/local/lib/vmware-tools/modules/drivers/vmhgfs.ko...done.
Loaded symbols for /usr/local/lib/vmware-tools/modules/drivers/vmhgfs.ko
Reading symbols from /boot/kernel/aio.ko.symbols...done.
Loaded symbols for /boot/kernel/aio.ko.symbols
Reading symbols from /boot/kernel/mqueuefs.ko.symbols...done.
Loaded symbols for /boot/kernel/mqueuefs.ko.symbols
Reading symbols from /boot/kernel/if_vlan.ko...done.
Loaded symbols for /boot/kernel/if_vlan.ko
#0  doadump (textdump=0) at pcpu.h:233
233	pcpu.h: No such file or directory.
	in pcpu.h
(kgdb) bt
#0  doadump (textdump=0) at pcpu.h:233
#1  0xc04c764d in db_fncall (dummy1=-1063112532, dummy2=0, dummy3=-1068053257, dummy4=0xe271b11c "_at_?q?([??0??Ƭ0??\001") at /usr/src/sys/ddb/db_command.c:568
#2  0xc04c732b in db_command (cmd_table=<value optimized out>) at /usr/src/sys/ddb/db_command.c:440
#3  0xc04c7070 in db_command_loop () at /usr/src/sys/ddb/db_command.c:493
#4  0xc04c9aa0 in db_trap (type=<value optimized out>, code=<value optimized out>) at /usr/src/sys/ddb/db_main.c:251
#5  0xc06d5b84 in kdb_trap (type=<value optimized out>, code=<value optimized out>, tf=<value optimized out>) at /usr/src/sys/kern/subr_kdb.c:654
#6  0xc0930657 in trap (frame=<value optimized out>) at /usr/src/sys/i386/i386/trap.c:693
#7  0xc091883c in calltrap () at /usr/src/sys/i386/i386/exception.s:169
#8  0xc06d540d in kdb_enter (why=0xc099dc65 "panic", msg=<value optimized out>) at cpufunc.h:71
#9  0xc0690b7f in panic (fmt=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:739
#10 0xc0874fca in softdep_disk_write_complete (bp=<value optimized out>) at /usr/src/sys/ufs/ffs/ffs_softdep.c:1036
#11 0xc073b033 in bufdone_finish (bp=0xe25a24f0) at buf.h:420
#12 0xc073ae40 in bufdone (bp=<value optimized out>) at /usr/src/sys/kern/vfs_bio.c:3795
#13 0xc05dda61 in g_vfs_done (bip=<value optimized out>) at /usr/src/sys/geom/geom_vfs.c:157
#14 0xc05d82ff in g_io_deliver (bp=0xc6f6eab0, error=<value optimized out>) at /usr/src/sys/geom/geom_io.c:669
#15 0xc05dc03e in g_std_done (bp=<value optimized out>) at /usr/src/sys/geom/geom_subr.c:1026
#16 0xc05d82ff in g_io_deliver (bp=0xc7096be0, error=<value optimized out>) at /usr/src/sys/geom/geom_io.c:669
#17 0xc05d51a0 in g_disk_done_single (bp=0xc7096be0) at /usr/src/sys/geom/geom_disk.c:254
#18 0xc048ea6d in dadone (periph=<value optimized out>, done_ccb=<value optimized out>) at /usr/src/sys/cam/scsi/scsi_da.c:3021
#19 0xc0466ee4 in xpt_done_process (ccb_h=0xcd2b9000) at /usr/src/sys/cam/cam_xpt.c:5248
#20 0xc046bbf4 in xpt_done_td (arg=0xc0a1d480) at /usr/src/sys/cam/cam_xpt.c:5275
#21 0xc06502e3 in fork_exit (callout=0xc046ba00 <xpt_done_td>) at /usr/src/sys/kern/kern_fork.c:977
#22 0xc09188e4 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:278
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