panic: vref used where vget required
Stopped at db_enter+0x1c: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 67426 66213 0 0x8000002 0 0 syz-executor.7
117445 79029 0 0x1a000002 0x4000000 1 syz-fuzzer
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828d2a8c) at panic+0x17b sys/kern/subr_prf.c:198
vref(fffffd8066417640) at vref+0xc7 sys/kern/vfs_subr.c:698
namei(ffff800031150c68) at namei+0x3b2 sys/kern/vfs_lookup.c:221
vn_open(ffff800031150c68,30001,0) at vn_open+0x101 sys/kern/vfs_vnops.c:140
doopenat(ffff80002a20e540,ffffff9c,73544240d850,30000,0,ffff800031150e10) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff800031150ec0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff800031150ec0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73544240d350, 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: vref used where vget required
ddb{0}> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828d2a8c) at panic+0x17b sys/kern/subr_prf.c:198
vref(fffffd8066417640) at vref+0xc7 sys/kern/vfs_subr.c:698
namei(ffff800031150c68) at namei+0x3b2 sys/kern/vfs_lookup.c:221
vn_open(ffff800031150c68,30001,0) at vn_open+0x101 sys/kern/vfs_vnops.c:140
doopenat(ffff80002a20e540,ffffff9c,73544240d850,30000,0,ffff800031150e10) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff800031150ec0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff800031150ec0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73544240d350, count: -8
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff800031150900
rbx 0xffffffff82c9bcdf cpu_info_full_primary+0x2cdf
rdx 0
rcx 0xffff80002a20e540
rax 0xffffffff82c9aff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xd17ebd474ac2dfa
r11 0x3ea4dfabad6dbb99
r12 0xffffffff82c9bae0 cpu_info_full_primary+0x2ae0
r13 0
r14 0
r15 0x1
rip 0xffffffff815a061c db_enter+0x1c
cs 0x8
rflags 0x246
rsp 0xffff8000311508f0
ss 0x10
db_enter+0x1c: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.7) tid=67426 pid=66213 tcnt=1 stat=onproc
flags process=8000002<EXEC> proc=0
runpri=32, usrpri=83, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff8000ffffcce0,0xffff8000373af240
process=0xffff800030d19ad0 user=0xffff80003114b000, vmspace=0xfffffd806ca16a68
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
96203 41689 83621 0 2 0x8000000 syz-executor.3
96203 48138 83621 0 2 0xc000000 syz-executor.3
49213 62419 13381 0 2 0x8000000 syz-executor.5
49213 306448 13381 0 3 0xc000080 fsleep syz-executor.5
10879 292744 16573 0 2 0x8000000 syz-executor.2
10879 2376 16573 0 3 0xc000080 ttyin syz-executor.2
99592 418649 77801 0 2 0x8000480 syz-executor.4
99592 457454 77801 0 3 0xc000080 sbwait syz-executor.4
99592 344018 77801 0 3 0xc000000 smrbar syz-executor.4
*66213 67426 79029 0 7 0x8000002 syz-executor.7
77801 25043 79029 0 2 0x8000002 syz-executor.4
46224 252682 79029 0 2 0x8000002 syz-executor.6
83621 259041 79029 0 3 0x8000082 nanoslp syz-executor.3
54338 421729 0 0 3 0x14200 acct acct
82128 21403 79029 0 2 0x8000002 syz-executor.0
13381 504867 79029 0 3 0x8000082 nanoslp syz-executor.5
42113 462223 0 0 3 0x14280 nfsidl nfsio
93878 426366 0 0 3 0x14280 nfsidl nfsio
9923 292950 0 0 3 0x14280 nfsidl nfsio
75102 60978 0 0 3 0x14280 nfsidl nfsio
55958 257489 0 0 3 0x14280 nfsidl nfsio
40072 474707 0 0 3 0x14280 nfsidl nfsio
29710 308490 0 0 3 0x14280 nfsidl nfsio
68112 258655 0 0 3 0x14280 nfsidl nfsio
10550 499761 0 0 3 0x14280 nfsidl nfsio
13082 98482 0 0 3 0x14280 nfsidl nfsio
25751 404453 0 0 3 0x14280 nfsidl nfsio
34128 208919 0 0 3 0x14280 nfsidl nfsio
81628 120228 0 0 3 0x14280 nfsidl nfsio
62868 212601 0 0 3 0x14280 nfsidl nfsio
88276 3779 0 0 3 0x14280 nfsidl nfsio
82827 410055 0 0 3 0x14280 nfsidl nfsio
84395 255436 0 0 3 0x14280 nfsidl nfsio
6624 86228 0 0 3 0x14280 nfsidl nfsio
83688 150650 0 0 3 0x14280 nfsidl nfsio
3307 276199 0 0 3 0x14280 nfsidl nfsio
16573 249762 79029 0 3 0x8000082 nanoslp syz-executor.2
17467 492266 79029 0 2 0x8000002 syz-executor.1
96585 308579 0 0 3 0x14200 bored sosplice
79029 232103 66243 0 3 0x1a000082 thrsleep syz-fuzzer
79029 363892 66243 0 2 0x1e000482 syz-fuzzer
79029 407789 66243 0 3 0x1e000082 thrsleep syz-fuzzer
79029 155918 66243 0 3 0x1e000082 thrsleep syz-fuzzer
79029 199913 66243 0 3 0x1e000082 wait syz-fuzzer
79029 117445 66243 0 7 0x1e000002 syz-fuzzer
79029 458504 66243 0 3 0x1e000082 wait syz-fuzzer
79029 502825 66243 0 3 0x1e000082 wait syz-fuzzer
79029 46892 66243 0 3 0x1e000082 wait syz-fuzzer
79029 469544 66243 0 3 0x1e000082 wait syz-fuzzer
79029 314753 66243 0 3 0x1e000082 thrsleep syz-fuzzer
79029 517166 66243 0 2 0x1e000082 syz-fuzzer
79029 164281 66243 0 3 0x1e000082 wait syz-fuzzer
79029 515505 66243 0 3 0x1e000082 wait syz-fuzzer
79029 54792 66243 0 3 0x1e000082 wait syz-fuzzer
79029 440907 66243 0 3 0x1e000082 thrsleep syz-fuzzer
66243 293559 93507 0 3 0x810008a sigsusp ksh
93507 147476 81564 0 3 0x1800009a kqread sshd
4975 502651 1 0 3 0x18100083 ttyin getty
81564 177475 1 0 3 0x18000088 kqread sshd
96407 443208 19401 74 3 0x19100092 bpf pflogd
19401 92915 1 0 3 0x18000080 sbwait pflogd
91650 470070 34777 73 3 0x19100090 kqread syslogd
34777 171286 1 0 3 0x18100082 sbwait syslogd
10891 461471 1 0 3 0x18100080 kqread resolvd
20515 394075 71669 77 3 0x18100092 kqread dhcpleased
3652 50831 71669 77 3 0x18100092 kqread dhcpleased
71669 401608 1 0 3 0x18000080 kqread dhcpleased
45868 160674 0 0 3 0x14200 bored smr
71502 467632 0 0 2 0x14200 zerothread
9105 416304 0 0 3 0x14200 aiodoned aiodoned
49731 364339 0 0 3 0x14200 syncer update
58421 195855 0 0 3 0x14200 cleaner cleaner
38852 215929 0 0 3 0x14200 reaper reaper
95580 232833 0 0 3 0x14200 pgdaemon pagedaemon
66024 10481 0 0 3 0x14200 bored viomb
82733 337577 0 0 3 0x40014200 acpi0 acpi0
31984 69277 0 0 3 0x40014200 idle1
88982 131783 0 0 3 0x14200 bored softnet3
10190 30792 0 0 3 0x14200 bored softnet2
73237 2196 0 0 3 0x14200 bored softnet1
72415 338466 0 0 2 0x14200 softnet0
36362 458582 0 0 3 0x14200 bored systqmp
98914 89534 0 0 3 0x14200 bored systq
84304 504632 0 0 3 0x14200 tmoslp softclockmp
88742 146922 0 0 3 0x40014200 tmoslp softclock
44235 404181 0 0 3 0x40014200 idle0
1 510995 0 0 3 0x8080082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 99592 (syz-executor.4) thread 0xffff8000ffff39c8 (457454)
exclusive rrwlock inode r = 0 (0xfffffd806e1caf80)
#0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x446 sys/kern/subr_witness.c:1187
#1 rw_enter+0x32d sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 ufs_ihashins+0x46
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1230
#6 ufs_lookup+0x1113 sys/ufs/ufs/ufs_lookup.c:573
#7 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
#8 vfs_lookup+0x6f8 sys/kern/vfs_lookup.c:566
#9 namei+0x56a sys/kern/vfs_lookup.c:250
#10 vn_open+0x101 sys/kern/vfs_vnops.c:140
#11 vndioctl+0x988 sys/dev/vnd.c:457
#12 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:264
#13 vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525
#14 sys_ioctl+0x4a9
#15 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
#15 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
#16 Xsyscall+0x128
Process 99592 (syz-executor.4) thread 0xffff8000ffff3738 (344018)
exclusive rwlock clonelk r = 0 (0xffffffff82d416f0)
#0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x446 sys/kern/subr_witness.c:1187
#1 if_clone_destroy+0x4d sys/net/if.c:1367
#2 tun_dev_close+0x141 sys/net/if_tun.c:521
#3 spec_close+0x2d4 sys/kern/spec_vnops.c:538
#4 VOP_CLOSE+0xeb sys/kern/vfs_vops.c:156
#5 vn_close+0x76 sys/kern/vfs_vnops.c:292
#6 sys_ktrace+0xf6 sys/kern/kern_ktrace.c:552
#7 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
#7 syscall+0x854 sys/arch/amd64/amd64/trap.c:577
#8 Xsyscall+0x128
Process 66213 (syz-executor.7) thread 0xffff80002a20e540 (67426)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82db4508)
#0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x446 sys/kern/subr_witness.c:1187
#1 syscall+0x83b mi_syscall sys/sys/syscall_mi.h:180 [inline]
#1 syscall+0x83b sys/arch/amd64/amd64/trap.c:577
#2 Xsyscall+0x128
Process 17467 (syz-executor.1) thread 0xffff8000ffff27d8 (492266)
exclusive rrwlock inode r = 0 (0xfffffd806d2e5928)
#0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x446 sys/kern/subr_witness.c:1187
#1 rw_enter+0x32d sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 ufs_ihashins+0x46
#5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1230
#6 ffs_inode_alloc+0x1e4 sys/ufs/ffs/ffs_alloc.c:393
#7 ufs_mkdir+0xe6 sys/ufs/ufs/ufs_vnops.c:1117
#8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388
#9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3077
#10 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
#10 syscall+0x854 sys/arch/amd64/amd64/trap.c:577
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8069022e68)
#0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x446 sys/kern/subr_witness.c:1187
#1 rw_enter+0x32d sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x91 sys/kern/kern_rwlock.c:464
#3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518
#4 vn_lock+0x85 sys/kern/vfs_vnops.c:564
#5 vfs_lookup+0xd3 sys/kern/vfs_lookup.c:418
#6 namei+0x56a sys/kern/vfs_lookup.c:250
#7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3062
#8 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
#8 syscall+0x854 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
Process 79029 (syz-fuzzer) thread 0xffff80002a1487b8 (117445)
exclusive rwlock pipelk r = 0 (0xfffffd806f908c60)
#0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x446 sys/kern/subr_witness.c:1187
#1 filt_pipeprocess+0x3b knote_process sys/sys/event.h:356 [inline]
#1 filt_pipeprocess+0x3b sys/kern/sys_pipe.c:986
#2 kqueue_scan+0x6e7 sys/kern/kern_event.c:1494
#3 sys_kevent+0x567 sys/kern/kern_event.c:1062
#4 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
#4 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
#5 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10207 6521K 6960K 166960K 14005 0
pcb 17 12K 12K 166960K 491 0
rtable 209 7K 9K 166960K 1444 0
pf 41 11K 11K 166960K 206 0
ifaddr 45 15K 17K 166960K 204 0
ifgroup 72 3K 3K 166960K 342 0
sysctl 4 1K 1K 166960K 14 0
counters 72 37K 37K 166960K 202 0
ioctlops 0 0K 4K 166960K 1670 0
iov 0 0K 28K 166960K 212 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1450 91K 91K 166960K 3252 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 72 0
VM map 2 1K 1K 166960K 2 0
sem 17 1K 1K 166960K 73 0
dirhash 12 2K 2K 166960K 75 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 14 49K 93K 166960K 3493 0
sigio 0 0K 0K 166960K 84 0
proc 70 91K 152K 166960K 1546 0
subproc 104 6K 8K 166960K 444 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 490 0
in_multi 86 6K 7K 166960K 507 0
ether_multi 1 0K 0K 166960K 20 0
mrt 1 0K 0K 166960K 11 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 97 440K 440K 166960K 97 0
exec 0 0K 1K 166960K 1155 0
pfkey data 0 0K 0K 166960K 9 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 299 182K 182K 166960K 32257 0
UVM aobj 110 3K 4K 166960K 130 0
pinsyscall 38 76K 108K 166960K 5364 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 305 0
NDP 16 0K 2K 166960K 149 0
temp 76 6816K 7320K 166960K 90195 0
kqueue 12 18K 28K 166960K 531 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 120 370 0 367 1 0 1 1 0 8 0
rtentry 112 483 0 389 5 1 4 4 0 8 0
unpcb 144 2856 0 2839 19 18 1 6 0 8 0
syncache 336 4 0 4 1 1 0 1 0 8 0
tcpqe 32 107 0 107 1 1 0 1 0 8 0
tcpcb 808 1195 0 1190 30 25 5 14 0 8 4
arp 120 98 0 80 1 0 1 1 0 8 0
inpcb 384 3769 0 3761 40 35 5 15 0 8 4
nd6 136 121 0 100 2 0 2 2 0 8 0
pkpcb 40 23 0 23 8 7 1 1 0 8 1
kcovpl 48 34 0 26 1 0 1 1 0 8 0
ppxss 1168 9 0 9 7 7 0 1 0 8 0
pffrag 232 29 0 24 1 0 1 1 0 482 0
pffrnode 88 27 0 23 1 0 1 1 0 8 0
pffrent 40 267 0 262 1 0 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 296 0 225 1 0 1 1 0 8 0
pfstkey 128 296 0 225 3 0 3 3 0 8 0
pfstate 376 296 0 225 9 0 9 9 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1761 0 1352 40 8 32 33 0 8 0
art_table 32 1762 0 1352 5 0 5 5 0 8 0
art_node 16 477 0 391 1 0 1 1 0 8 0
sysvmsgpl 40 25 0 20 2 1 1 1 0 8 0
semupl 112 5 0 5 1 1 0 1 0 8 0
semapl 112 66 0 51 1 0 1 1 0 8 0
shmpl 112 127 0 20 4 0 4 4 0 8 0
dirhash 1024 59 0 42 3 0 3 3 0 8 0
dino2pl 256 6876 0 5351 96 0 96 96 0 8 0
ffsino 272 6876 0 5351 103 0 103 103 0 8 0
nchpl 144 12189 0 10462 67 0 67 67 0 8 0
uvmvnodes 80 8091 0 0 166 0 166 166 0 8 0
vnodes 216 8091 0 0 450 0 450 450 0 8 0
vnodes: pool(0xffffffff82d8e1d0:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd8066417f90 (p 0xfffffd8066417000)
namei 1024 41675 0 41673 5 4 1 2 0 8 0
percpumem 16 115 0 65 1 0 1 1 0 8 0
vcpupl 3904 19 0 3 2 0 2 2 0 8 0
vmpool 696 22 0 6 3 1 2 2 0 8 0
kstatmem 264 162 0 130 5 2 3 3 0 8 0
scsiplug 72 3 0 3 3 3 0 1 0 8 0
scxspl 216 64469 0 64469 23 22 1 8 1 8 1
plimitpl 152 480 0 463 1 0 1 1 0 8 0
sigapl 424 3779 0 3711 12 3 9 9 0 8 0
futexpl 64 51573 0 51572 3 2 1 1 0 8 0
knotepl 120 627 0 0 19 0 19 19 0 8 0
kqueuepl 216 984 0 976 1 0 1 1 0 8 0
pipepl 320 763 0 735 5 2 3 4 0 8 0
fdescpl 496 3737 0 3710 9 4 5 5 0 8 0
filepl 152 24194 0 23948 30 18 12 15 0 8 0
lockfpl 104 1027 0 1025 2 1 1 2 0 8 0
lockfspl 48 436 0 434 1 0 1 1 0 8 0
sessionpl 144 50 0 33 1 0 1 1 0 8 0
pgrppl 48 123 0 106 1 0 1 1 0 8 0
ucredpl 104 3860 0 3847 1 0 1 1 0 8 0
zombiepl 144 3712 0 3711 2 1 1 1 0 8 0
processpl 1136 3779 0 3711 7 1 6 6 0 8 0
procpl 656 7626 0 7538 11 2 9 9 0 8 0
srpgc 96 8 0 8 2 2 0 1 0 8 0
sosppl 168 61 0 61 11 10 1 1 0 8 1
sockpl 664 7065 0 7037 53 46 7 14 0 8 4
mcl64k 65536 7 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 10 0 0 2 0 2 2 0 8 0
mcl4k 4096 7 0 0 1 0 1 1 0 8 0
mcl2k 2048 423 0 0 42 0 42 42 0 8 0
mtagpl 96 30 0 0 1 0 1 1 0 8 0
mbufpl 256 1204 0 0 63 0 63 63 0 8 0
bufpl 280 14925 0 6834 579 0 579 579 0 8 0
anonpl 24 553042 0 546810 113 48 65 77 0 186 0
amapchunkpl 152 104707 0 104057 74 41 33 41 0 158 0
amappl16 200 12502 0 12368 80 67 13 22 0 8 0
amappl15 192 22 0 22 3 3 0 1 0 8 0
amappl14 184 239 0 224 2 1 1 2 0 8 0
amappl13 176 7 0 7 1 1 0 1 0 8 0
amappl12 168 4817 0 4788 3 1 2 2 0 8 0
amappl11 160 73 0 59 1 0 1 1 0 8 0
amappl10 152 95 0 84 1 0 1 1 0 8 0
amappl9 144 246 0 246 2 2 0 1 0 8 0
amappl8 136 187 0 148 2 0 2 2 0 8 0
amappl7 128 59 0 41 1 0 1 1 0 8 0
amappl6 120 732 0 712 2 0 2 2 0 8 0
amappl5 112 288 0 273 1 0 1 1 0 8 0
amappl4 104 817 0 779 2 0 2 2 0 8 0
amappl3 96 19825 0 19747 3 0 3 3 0 8 0
amappl2 88 4195 0 4121 4 2 2 4 0 8 0
amappl1 80 21577 0 21037 23 9 14 23 0 8 0
amappl 88 31288 0 31095 7 1 6 6 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 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 129 0 20 2 0 2 2 0 8 0
uaddrrnd 24 3759 0 3716 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 3759 0 3716 1 0 1 1 0 8 0
vmmpekpl 168 29540 0 29480 4 0 4 4 0 8 0
vmmpepl 168 240943 0 239032 160 59 101 118 0 357 0
vmsppl 440 3758 0 3716 11 5 6 6 0 8 0
rwobjpl 56 68301 0 58929 137 4 133 133 0 8 0
pdppl 4096 7525 0 7448 216 132 84 86 0 8 7
pvpl 32 45846 0 0 370 0 370 370 0 265 0
pmappl 248 3758 0 3716 4 1 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 615 0 179 13 0 13 13 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff828d2a8c) at panic+0x17b sys/kern/subr_prf.c:198
vref(fffffd8066417640) at vref+0xc7 sys/kern/vfs_subr.c:698
namei(ffff800031150c68) at namei+0x3b2 sys/kern/vfs_lookup.c:221
vn_open(ffff800031150c68,30001,0) at vn_open+0x101 sys/kern/vfs_vnops.c:140
doopenat(ffff80002a20e540,ffffff9c,73544240d850,30000,0,ffff800031150e10) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff800031150ec0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff800031150ec0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73544240d350, count: -8
ddb{0}> machine ddbcpu 1