panic: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x73602e616000, opte 0xffffffffffffffff
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
429731 581 0 0x8000000 0 1 syz-executor
*419980 57905 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff83078d9d) at panic+0x1e5 sys/kern/subr_prf.c:198
pmap_remove_pte(fffffd806b0217d0,fffffd80078e3060,7fb9b0173000,73602e600000,73602e667000,0) at pmap_remove_pte
pmap_do_remove(fffffd806b0217d0,73602df67000,73602e667000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1911
uvm_unmap_kill_entry_withlock(fffffd805fc3b538,fffffd806045c818,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
uvm_map_teardown(fffffd805fc3b538) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd805fc3b538) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd9448) at reaper+0x256 sys/kern/kern_exit.c:483
end trace frame: 0x0, count: 7
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: pmap_remove_ptes: unmanaged page marked PG_PVLIST: va 0x73602e616000, opte 0xffffffffffffffff
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff83078d9d) at panic+0x1e5 sys/kern/subr_prf.c:198
pmap_remove_pte(fffffd806b0217d0,fffffd80078e3060,7fb9b0173000,73602e600000,73602e667000,0) at pmap_remove_pte
pmap_do_remove(fffffd806b0217d0,73602df67000,73602e667000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1911
uvm_unmap_kill_entry_withlock(fffffd805fc3b538,fffffd806045c818,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
uvm_map_teardown(fffffd805fc3b538) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd805fc3b538) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd9448) at reaper+0x256 sys/kern/kern_exit.c:483
end trace frame: 0x0, count: -8
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800029fe5700
rbx 0xffffffff834bad87 cpu_info_full_primary+0x2d87
rdx 0
rcx 0xffff800029fd9448
rax 0xffffffff834b9ff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x3f6b9faff3213a31
r11 0xaa5bb5077d092383
r12 0xffffffff834bab88 cpu_info_full_primary+0x2b88
r13 0
r14 0
r15 0x1
rip 0xffffffff822d8415 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff800029fe56f0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (reaper) tid=419980 pid=57905 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
runpri=4, usrpri=79, slppri=4, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800029fd96d0,0xffff800029fd91d0
process=0xffff800029febaf0 user=0xffff800029fe0000, vmspace=0xffffffff835a0218
estcpu=29, cpticks=1, pctcpu=13.6, user=0, sys=4581, intr=12
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
581 429731 62520 0 7 0x8000000 syz-executor
581 367223 62520 0 2 0xc000000 syz-executor
581 313909 62520 0 2 0xc000000 syz-executor
21080 216040 85881 0 2 0x8000000 syz-executor
34484 269625 54337 0 2 0x8000000 syz-executor
73993 159660 69924 0 2 0x8000000 syz-executor
5306 290088 63823 0 2 0x8000000 syz-executor
5306 420562 63823 0 3 0xc000080 fsleep syz-executor
27661 333352 42320 0 2 0x8000000 syz-executor
27661 315360 42320 0 3 0xc000080 fsleep syz-executor
12879 134779 18916 0 2 0x9000000 syz-executor
12879 341745 18916 0 3 0xd000080 fsleep syz-executor
12879 194263 18916 0 3 0xd000080 fsleep syz-executor
12879 24437 18916 0 3 0xd000080 fsleep syz-executor
42320 493166 36848 0 3 0x8000082 nanoslp syz-executor
69924 334015 36848 0 3 0x8000082 nanoslp syz-executor
85881 490103 36848 0 3 0x8000082 nanoslp syz-executor
62520 70001 36848 0 2 0x8000002 syz-executor
63823 58730 36848 0 3 0x8000082 nanoslp syz-executor
18916 171625 36848 0 2 0x8000002 syz-executor
54337 427174 36848 0 2 0x8000002 syz-executor
39699 268723 1 0 3 0x18100083 ttyin getty
76668 279758 0 0 3 0x14280 nfsidl nfsio
64415 508834 0 0 3 0x14280 nfsidl nfsio
36012 330608 0 0 3 0x14280 nfsidl nfsio
32905 317337 0 0 3 0x14280 nfsidl nfsio
69342 266024 0 0 3 0x14280 nfsidl nfsio
70658 201736 0 0 3 0x14280 nfsidl nfsio
11302 495109 0 0 3 0x14280 nfsidl nfsio
58354 95511 0 0 3 0x14280 nfsidl nfsio
62911 236351 0 0 3 0x14280 nfsidl nfsio
14316 211391 0 0 3 0x14280 nfsidl nfsio
91773 351822 0 0 3 0x14280 nfsidl nfsio
99289 414558 0 0 3 0x14280 nfsidl nfsio
10885 192616 0 0 3 0x14280 nfsidl nfsio
89726 218238 0 0 3 0x14280 nfsidl nfsio
60846 413500 0 0 3 0x14280 nfsidl nfsio
37342 431257 0 0 3 0x14280 nfsidl nfsio
66271 275021 0 0 3 0x14280 nfsidl nfsio
15411 182767 0 0 3 0x14280 nfsidl nfsio
10424 247561 0 0 3 0x14280 nfsidl nfsio
16601 364416 0 0 3 0x14280 nfsidl nfsio
79467 429121 0 0 3 0x14200 bored sosplice
36848 323152 17959 0 2 0x8000082 syz-executor
17959 505620 39100 0 3 0x810008a sigsusp ksh
39100 309938 89813 0 3 0x18000098 kqread sshd-session
89813 83570 1178 0 3 0x18000092 kqread sshd-session
1178 268769 1 0 3 0x18000088 kqread sshd
69017 410908 13704 74 3 0x19100092 bpf pflogd
13704 377341 1 0 3 0x18000080 sbwait pflogd
7155 432436 1740 73 2 0x19100010 syslogd
1740 370134 1 0 3 0x18100082 sbwait syslogd
47901 461047 1 0 3 0x18100080 kqread resolvd
4281 70524 32341 77 3 0x18100092 kqread dhcpleased
95175 30716 32341 77 3 0x18100092 kqread dhcpleased
32341 203066 1 0 3 0x18000080 kqread dhcpleased
92740 375717 0 0 3 0x14200 bored smr
1042 149064 0 0 2 0x14200 zerothread
41711 440258 0 0 3 0x14200 aiodoned aiodoned
71940 160526 0 0 3 0x14200 syncer update
5122 259704 0 0 3 0x14200 cleaner cleaner
*57905 419980 0 0 7 0x14200 reaper
7236 277619 0 0 3 0x14200 pgdaemon pagedaemon
48120 5148 0 0 3 0x14200 bored viomb
8227 228157 0 0 3 0x40014200 acpi0 acpi0
60057 405673 0 0 3 0x40014200 idle1
54956 459715 0 0 3 0x14200 bored softnet3
98145 457023 0 0 3 0x14200 bored softnet2
79323 9002 0 0 3 0x14200 bored softnet1
48381 184254 0 0 3 0x14200 bored softnet0
73678 341404 0 0 3 0x14200 bored systqmp
583 318837 0 0 3 0x14200 bored systq
98296 427109 0 0 3 0x14200 tmoslp softclockmp
40689 60677 0 0 3 0x40014200 tmoslp softclock
4255 167018 0 0 3 0x40014200 idle0
1 232129 0 0 3 0x8000082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b0217e0)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline]
#3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline]
#3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1815
#4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
#5 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
#6 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
#7 reaper+0x256 sys/kern/kern_exit.c:483
#8 proc_trampoline+0x10
Process 581 (syz-executor) thread 0xffff8000ffffdbe8 (429731)
shared rwlock vmmaplk r = 0 (0xfffffd806af5d990)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785
#2 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672
#3 uvm_fault+0x112 sys/uvm/uvm_fault.c:600
#4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
#5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
#6 recall_trap+0x8
Process 7155 (syslogd) thread 0xffff8000ffffd6d8 (432436)
exclusive rrwlock inode r = 0 (0xfffffd806e4885f0)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2927
#6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#7 Xsyscall+0x128
Process 57905 (reaper) thread 0xffff800029fd9448 (419980)
exclusive rwlock vmmaplk r = 0 (0xfffffd805fc3b628)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252
#3 uvm_map_teardown+0x5e sys/uvm/uvm_map.c:2466
#4 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
#5 reaper+0x256 sys/kern/kern_exit.c:483
#6 proc_trampoline+0x10
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b0217e0)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 mtx_enter_try+0x178
#2 mtx_enter+0x60 sys/kern/kern_lock.c:239
#3 pmap_do_remove+0xa9 rcr3 machine/cpufunc.h:139 [inline]
#3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline]
#3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1815
#4 uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
#5 uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
#6 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
#7 reaper+0x256 sys/kern/kern_exit.c:483
#8 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10256 10330K 10794K 166960K 12657 0
pcb 18 16K 18K 166960K 233 0
rtable 228 11K 12K 166960K 1249 0
pf 36 18K 25K 166960K 182 0
ifaddr 39 6K 8K 166960K 175 0
ifgroup 55 2K 2K 166960K 215 0
sysctl 4 1K 1K 166960K 4 0
counters 64 36K 37K 166960K 154 0
ioctlops 0 0K 5K 166960K 1592 0
iov 0 0K 14K 166960K 129 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1422 89K 90K 166960K 2746 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 19 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 71 0
dirhash 12 2K 3K 166960K 36 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 16 57K 97K 166960K 1232 0
sigio 0 0K 0K 166960K 22 0
proc 70 91K 140K 166960K 1332 0
subproc 91 5K 6K 166960K 442 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 106 0
in_multi 87 6K 7K 166960K 406 0
ether_multi 1 0K 0K 166960K 3 0
mrt 1 0K 0K 166960K 3 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 181 811K 811K 166960K 181 0
exec 0 0K 1K 166960K 860 0
pfkey data 0 0K 2K 166960K 4 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 230 76K 95K 166960K 11874 0
UVM aobj 38 6K 6K 166960K 39 0
pinsyscall 41 82K 106K 166960K 2999 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 51 0
NDP 12 0K 1K 166960K 125 0
temp 60 6815K 6888K 166960K 55573 0
kqueue 13 20K 30K 166960K 166 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 211 0 208 2 1 1 2 0 8 0
rtentry 112 422 0 324 4 0 4 4 0 8 0
unpcb 144 1162 0 1145 15 9 6 6 0 8 5
syncache 336 6 0 6 2 2 0 1 0 8 0
tcpcb 808 497 0 491 25 24 1 14 0 8 0
arp 120 74 0 58 1 0 1 1 0 8 0
inpcb 336 1722 0 1710 46 44 2 13 0 8 0
nd6 136 108 0 85 1 0 1 1 0 8 0
pkpcb 40 15 0 15 6 6 0 1 0 8 0
kcovpl 48 34 0 27 1 0 1 1 0 8 0
ppxss 1168 12 0 12 6 6 0 1 0 8 0
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 6 0 5 1 0 1 1 0 482 0
pffrnode 88 6 0 5 1 0 1 1 0 8 0
pffrent 40 8 0 7 1 0 1 1 0 8 0
pfosfp 40 1429 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1429 0 714 21 0 21 21 0 8 0
pfrktable 1344 6 0 2 1 0 1 1 0 8 0
pfanchor 1288 6 0 0 1 0 1 1 0 8 0
pftag 88 10 0 8 1 0 1 1 0 8 0
pfqueue 264 2 0 0 1 0 1 1 0 8 0
pfstitem 24 95 0 60 1 0 1 1 0 8 0
pfstkey 128 101 0 66 2 0 2 2 0 8 0
pfstate 376 97 0 63 5 0 5 5 0 8 0
pfrule 1344 32 0 22 2 0 2 2 0 8 0
art_heap8 4096 2 0 1 2 1 1 2 0 8 0
art_heap4 256 1688 0 1279 35 6 29 30 0 8 0
art_table 32 1690 0 1280 4 0 4 4 0 8 0
art_node 16 419 0 330 1 0 1 1 0 8 0
sysvmsgpl 40 9 0 3 1 0 1 1 0 8 0
semupl 112 2 0 2 1 1 0 1 0 8 0
semapl 112 68 0 58 1 0 1 1 0 8 0
shmpl 112 36 0 1 1 0 1 1 0 8 0
dirhash 1024 33 0 16 3 0 3 3 0 8 0
dino2pl 256 3151 0 1598 98 0 98 98 0 8 0
ffsino 272 3151 0 1598 104 0 104 104 0 8 0
nchpl 144 4558 0 3969 64 40 24 64 0 8 0
uvmvnodes 80 4286 0 0 88 0 88 88 0 8 0
vnodes 216 4286 0 0 239 0 239 239 0 8 0
namei 1024 19253 0 19253 4 3 1 2 0 8 1
percpumem 16 91 0 45 1 0 1 1 0 8 0
vcpupl 3904 8 0 1 1 0 1 1 0 8 0
vmpool 696 11 0 4 1 0 1 1 0 8 0
pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0
kstatmem 264 114 0 90 4 1 3 3 0 8 0
scsiplug 72 2 0 2 1 1 0 1 0 8 0
scxspl 216 22368 0 22368 13 12 1 8 1 8 1
plimitpl 152 375 0 358 1 0 1 1 0 8 0
sigapl 424 1506 0 1436 9 0 9 9 0 8 0
futexpl 64 14279 0 14274 4 3 1 1 0 8 0
knotepl 120 563 0 0 18 0 18 18 0 8 0
kqueuepl 216 483 0 473 11 10 1 5 0 8 0
pipepl 320 281 0 254 3 0 3 3 0 8 0
fdescpl 496 1466 0 1436 8 3 5 6 0 8 0
filepl 152 11115 0 10882 51 32 19 22 0 8 6
lockfpl 104 555 0 553 3 2 1 2 0 8 0
lockfspl 48 202 0 200 1 0 1 1 0 8 0
sessionpl 144 51 0 42 1 0 1 1 0 8 0
pgrppl 48 136 0 119 1 0 1 1 0 8 0
ucredpl 104 1732 0 1718 1 0 1 1 0 8 0
zombiepl 144 1437 0 1436 3 2 1 1 0 8 0
processpl 1160 1506 0 1436 6 0 6 6 0 8 0
procpl 648 2890 0 2813 9 1 8 9 0 8 0
srpgc 96 16 0 16 4 4 0 1 0 8 0
sosppl 168 7 0 7 5 5 0 1 0 8 0
sockpl 664 3117 0 3085 62 47 15 15 0 8 12
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl16k 16384 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 271 0 0 34 0 34 34 0 8 0
mtagpl 96 5 0 0 1 0 1 1 0 8 0
mbufpl 256 410 0 0 23 0 23 23 0 8 0
bufpl 280 8153 0 1981 442 1 441 442 0 8 0
anonpl 24 261474 0 258100 104 74 30 72 0 185 0
amapchunkpl 152 38119 0 37665 50 27 23 33 0 158 2
amappl16 200 5848 0 5829 52 47 5 24 0 8 3
amappl15 192 18 0 17 1 0 1 1 0 8 0
amappl14 184 172 0 160 1 0 1 1 0 8 0
amappl13 176 33 0 33 1 1 0 1 0 8 0
amappl12 168 2530 0 2499 4 2 2 3 0 8 0
amappl11 160 54 0 40 1 0 1 1 0 8 0
amappl10 152 13 0 13 1 1 0 1 0 8 0
amappl9 144 130 0 130 1 1 0 1 0 8 0
amappl8 136 39 0 37 1 0 1 1 0 8 0
amappl7 128 163 0 151 1 0 1 1 0 8 0
amappl6 120 433 0 432 1 0 1 1 0 8 0
amappl5 112 244 0 232 1 0 1 1 0 8 0
amappl4 104 407 0 386 1 0 1 1 0 8 0
amappl3 96 7701 0 7593 4 0 4 4 0 8 0
amappl2 88 1014 0 951 2 0 2 2 0 8 0
amappl1 80 12754 0 12168 17 3 14 15 0 8 0
amappl 88 11238 0 11077 5 0 5 5 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 8 0 8 2 2 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 38 0 1 1 0 1 1 0 8 0
uaddrrnd 24 1477 0 1440 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1477 0 1440 1 0 1 1 0 8 0
vmmpekpl 168 13130 0 13064 4 0 4 4 0 8 0
vmmpepl 168 97667 0 95807 123 36 87 105 0 357 2
vmsppl 440 1476 0 1439 7 2 5 5 0 8 0
rwobjpl 56 34460 0 29214 79 4 75 75 0 8 0
pdppl 4096 2961 0 2885 152 74 78 87 0 8 2
pvpl 32 28659 0 0 231 0 231 231 0 265 0
pmappl 248 1476 0 1439 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 541 0 162 13 1 12 12 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff83078d9d) at panic+0x1e5 sys/kern/subr_prf.c:198
pmap_remove_pte(fffffd806b0217d0,fffffd80078e3060,7fb9b0173000,73602e600000,73602e667000,0) at pmap_remove_pte
pmap_do_remove(fffffd806b0217d0,73602df67000,73602e667000,0) at pmap_do_remove+0x533 sys/arch/amd64/amd64/pmap.c:1911
uvm_unmap_kill_entry_withlock(fffffd805fc3b538,fffffd806045c818,0) at uvm_unmap_kill_entry_withlock+0x274 sys/uvm/uvm_map.c:1865
uvm_map_teardown(fffffd805fc3b538) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd805fc3b538) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422
reaper(ffff800029fd9448) at reaper+0x256 sys/kern/kern_exit.c:483
end trace frame: 0x0, count: -8
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
end of kernel
end trace frame: 0x7488333647b0, count: 12
ddb{1}> trace
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
end of kernel
end trace frame: 0x7488333647b0, count: -3