panic: missing alias
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*410813 85387 0 0x2 0 1K syz-executor.3
282795 28602 0 0x2 0 0 syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff82487574) at panic+0x177 sys/kern/subr_prf.c:202
vgonel(fffffd80714c2ac8,ffff800021236000) at vgonel+0x4f8 sys/kern/vfs_subr.c:1175
vrecycle(fffffd80714c2ac8,ffff800021236000) at vrecycle+0x54 sys/kern/vfs_subr.c:1102
ufs_inactive(ffff8000246de6e8) at ufs_inactive+0x2ae sys/ufs/ufs/ufs_inode.c:122
VOP_INACTIVE(fffffd80714c2ac8,ffff800021236000) at VOP_INACTIVE+0xc4 sys/kern/vfs_vops.c:505
vput(fffffd80714c2ac8) at vput+0xb6 sys/kern/vfs_subr.c:779
ufs_remove(ffff8000246de7e8) at ufs_remove+0x137 sys/ufs/ufs/ufs_vnops.c:618
VOP_REMOVE(fffffd80714c2828,fffffd80714c2ac8,ffff8000246de8c8) at VOP_REMOVE+0x118 sys/kern/vfs_vops.c:349
dounlinkat(ffff800021236000,ffffff9c,7f7ffffd5b90,0) at dounlinkat+0x10c sys/kern/vfs_syscalls.c:1885
syscall(ffff8000246dea40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246dea40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd6040, count: 3
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: missing alias
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff82487574) at panic+0x177 sys/kern/subr_prf.c:202
vgonel(fffffd80714c2ac8,ffff800021236000) at vgonel+0x4f8 sys/kern/vfs_subr.c:1175
vrecycle(fffffd80714c2ac8,ffff800021236000) at vrecycle+0x54 sys/kern/vfs_subr.c:1102
ufs_inactive(ffff8000246de6e8) at ufs_inactive+0x2ae sys/ufs/ufs/ufs_inode.c:122
VOP_INACTIVE(fffffd80714c2ac8,ffff800021236000) at VOP_INACTIVE+0xc4 sys/kern/vfs_vops.c:505
vput(fffffd80714c2ac8) at vput+0xb6 sys/kern/vfs_subr.c:779
ufs_remove(ffff8000246de7e8) at ufs_remove+0x137 sys/ufs/ufs/ufs_vnops.c:618
VOP_REMOVE(fffffd80714c2828,fffffd80714c2ac8,ffff8000246de8c8) at VOP_REMOVE+0x118 sys/kern/vfs_vops.c:349
dounlinkat(ffff800021236000,ffffff9c,7f7ffffd5b90,0) at dounlinkat+0x10c sys/kern/vfs_syscalls.c:1885
syscall(ffff8000246dea40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246dea40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd6040, count: -12
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff8000246de510
rbx 0xffff800020d39bff
rdx 0
rcx 0
rax 0xffff800021236000
r8 0x101010101010101
r9 0x8080808080808080
r10 0xbe94d4bacf6a1a04
r11 0x40fb147f3c453caf
r12 0xffff800020d39a00
r13 0
r14 0
r15 0x1
rip 0xffffffff8167b298 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000246de500
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.3) pid=410813 stat=onproc
flags process=2<EXEC> proc=0
pri=17, usrpri=82, nice=20
forw=0xffffffffffffffff, list=0xffff800021236540,0xffff8000ffff4018
process=0xffff8000211f2dc8 user=0xffff8000246d9000, vmspace=0xfffffd806ee0de68
estcpu=36, cpticks=1, pctcpu=0.13
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
18256 460318 46347 0 2 0 syz-executor.2
18256 334752 46347 0 3 0x4000080 poll syz-executor.2
54709 178075 0 0 3 0x14200 bored sosplice
*85387 410813 97042 0 7 0x2 syz-executor.3
46347 234800 97042 0 3 0x82 nanoslp syz-executor.2
93793 107294 97042 0 2 0x2 syz-executor.1
28602 282795 97042 0 7 0x2 syz-executor.0
97042 252364 79816 0 3 0x82 thrsleep syz-fuzzer
97042 110443 79816 0 3 0x4000082 nanoslp syz-fuzzer
97042 126745 79816 0 3 0x4000082 kqread syz-fuzzer
97042 20954 79816 0 3 0x4000082 thrsleep syz-fuzzer
97042 281671 79816 0 3 0x4000082 thrsleep syz-fuzzer
97042 100917 79816 0 3 0x4000082 thrsleep syz-fuzzer
97042 190027 79816 0 3 0x4000082 thrsleep syz-fuzzer
97042 364632 79816 0 3 0x4000082 thrsleep syz-fuzzer
79816 26514 34133 0 3 0x10008a sigsusp ksh
34133 282830 18996 0 3 0x9a poll sshd
13516 337910 1 0 3 0x100083 ttyin getty
18996 392658 1 0 3 0x88 poll sshd
51851 117007 52918 74 3 0x100092 bpf pflogd
52918 178183 1 0 3 0x80 netio pflogd
58405 303887 22956 73 3 0x100090 kqread syslogd
22956 459659 1 0 3 0x100082 netio syslogd
2346 190258 1 0 3 0x100080 kqread resolvd
46356 509306 43447 77 3 0x100092 kqread dhcpleased
38986 31576 43447 77 3 0x100092 kqread dhcpleased
43447 436003 1 0 3 0x80 kqread dhcpleased
58770 478871 0 0 3 0x14200 bored smr
59749 71198 0 0 2 0x14200 zerothread
99756 126281 0 0 3 0x14200 aiodoned aiodoned
50006 122357 0 0 3 0x14200 syncer update
1829 117986 0 0 3 0x14200 cleaner cleaner
79711 519017 0 0 3 0x14200 reaper reaper
80353 43662 0 0 3 0x14200 pgdaemon pagedaemon
31001 284905 0 0 3 0x14200 bored viomb
84354 498512 0 0 3 0x40014200 acpi0 acpi0
28697 386203 0 0 3 0x40014200 idle1
54441 272766 0 0 3 0x14200 bored softnet
53556 275753 0 0 3 0x14200 bored systqmp
40060 499766 0 0 3 0x14200 bored systq
41763 459191 0 0 3 0x40014200 bored softclock
31851 299337 0 0 3 0x40014200 idle0
1 30899 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 85387 (syz-executor.3) thread 0xffff800021236000 (410813)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8292d590)
#0 witness_lock+0x44d
#1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
#2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433
#4 tsleep+0x12c sys/kern/kern_synch.c:158
#5 biowait+0x91 sys/kern/vfs_bio.c:1271
#6 bwrite+0x21b sys/kern/vfs_bio.c:772
#7 ufs_dirremove+0x28b
#8 ufs_remove+0x154 sys/ufs/ufs/ufs_vnops.c:611
#9 VOP_REMOVE+0x118 sys/kern/vfs_vops.c:349
#10 dounlinkat+0x10c sys/kern/vfs_syscalls.c:1885
#11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#12 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd80789e12c0)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461
#3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534
#4 vn_lock+0x84 sys/kern/vfs_vnops.c:579
#5 vget+0x1d3 sys/kern/vfs_subr.c:677
#6 cache_lookup+0x2b4 sys/kern/vfs_cache.c:224
#7 ufs_lookup+0x1ac sys/ufs/ufs/ufs_lookup.c:162
#8 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85
#9 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561
#10 namei+0x36a sys/kern/vfs_lookup.c:245
#11 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1849
#12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#13 Xsyscall+0x128
Process 93793 (syz-executor.1) thread 0xffff8000212367e0 (107294)
exclusive rwlock vmmaplk r = 0 (0xfffffd8068e815e8)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458
#3 uvmspace_fork+0x103 sys/uvm/uvm_map.c:4110
#4 process_new+0x181 sys/kern/kern_fork.c:263
#5 fork1+0x30b sys/kern/kern_fork.c:382
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffffd8008586018)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458
#3 uvmspace_fork+0x37 sys/uvm/uvm_map.c:4101
#4 process_new+0x181 sys/kern/kern_fork.c:263
#5 fork1+0x30b sys/kern/kern_fork.c:382
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
Process 28602 (syz-executor.0) thread 0xffff8000212377a0 (282795)
exclusive rwlock vmmaplk r = 0 (0xfffffd8068e81758)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458
#3 uvmspace_fork+0x103 sys/uvm/uvm_map.c:4110
#4 process_new+0x181 sys/kern/kern_fork.c:263
#5 fork1+0x30b sys/kern/kern_fork.c:382
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffffd8008586468)
#0 witness_lock+0x44d
#1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458
#3 uvmspace_fork+0x37 sys/uvm/uvm_map.c:4101
#4 process_new+0x181 sys/kern/kern_fork.c:263
#5 fork1+0x30b sys/kern/kern_fork.c:382
#6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#7 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10168 6475K 6731K 78643K 11605 0
pcb 13 8K 8K 78643K 49 0
rtable 134 5K 7K 78643K 316 0
ifaddr 59 12K 14K 78643K 99 0
counters 48 34K 34K 78643K 54 0
ioctlops 0 0K 4K 78643K 1575 0
iov 0 0K 12K 78643K 140 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 5 0
vnodes 1296 81K 82K 78643K 2058 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 23 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 9 29K 49K 78643K 694 0
proc 70 87K 111K 78643K 405 0
subproc 52 3K 3K 78643K 52 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 18 0
in_multi 44 2K 3K 78643K 70 0
ether_multi 1 0K 0K 78643K 7 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 55 254K 254K 78643K 55 0
exec 0 0K 2K 78643K 527 0
tdb 3 0K 0K 78643K 3 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 216 43K 45K 78643K 10074 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 8 0
NDP 9 0K 1K 78643K 20 0
temp 68 4189K 4253K 78643K 5179 0
kqueue 10 14K 18K 78643K 45 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 22 0 0 1 0 1 1 0 8 0
rtpcb 120 36 0 33 1 0 1 1 0 8 0
rtentry 112 72 0 16 2 0 2 2 0 8 0
unpcb 136 212 0 197 3 0 3 3 0 8 2
syncache 296 4 0 4 1 1 0 1 0 8 0
tcpqe 32 187 0 187 2 2 0 2 0 8 0
tcpcb 736 284 0 280 20 13 7 14 0 8 6
arp 120 10 0 2 1 0 1 1 0 8 0
inpcb 304 619 0 612 16 7 9 11 0 8 8
nd6 48 13 0 4 1 0 1 1 0 8 0
kcovpl 48 4 0 0 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
pfrktable 1344 28 0 28 1 1 0 1 0 8 0
pfstitem 24 21 0 5 1 0 1 1 0 8 0
pfstkey 112 21 0 5 1 0 1 1 0 8 0
pfstate 320 21 0 5 2 0 2 2 0 8 0
pfrule 1360 32 0 27 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 303 0 70 18 0 18 18 0 8 2
art_table 32 304 0 70 3 0 3 3 0 8 0
art_node 16 71 0 21 1 0 1 1 0 8 0
sysvmsgpl 40 25 0 10 1 0 1 1 0 8 0
semupl 112 5 0 5 1 1 0 1 0 8 0
semapl 112 21 0 11 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 3108 0 1698 89 0 89 89 0 8 0
ffsino 272 3108 0 1698 95 0 95 95 0 8 0
nchpl 144 4118 0 2497 61 0 61 61 0 8 0
uvmvnodes 80 3305 0 0 68 0 68 68 0 8 0
vnodes 224 3305 0 0 195 0 195 195 0 8 0
namei 1024 11257 0 11257 1 0 1 1 0 8 1
percpumem 16 39 0 3 1 0 1 1 0 8 0
pfiaddrpl 120 8 0 8 1 1 0 1 0 8 0
scxspl 216 10158 0 10158 11 9 2 8 0 8 2
plimitpl 152 196 0 185 1 0 1 1 0 8 0
sigapl 424 933 0 896 5 0 5 5 0 8 0
futexpl 64 7325 0 7325 1 0 1 1 0 8 1
knotepl 112 79 0 0 3 0 3 3 0 8 0
kqueuepl 216 99 0 93 3 2 1 3 0 8 0
pipepl 336 97 0 81 2 0 2 2 0 8 0
fdescpl 496 918 0 896 4 1 3 4 0 8 0
filepl 152 4999 0 4846 15 4 11 11 0 8 5
lockfpl 104 72 0 70 1 0 1 1 0 8 0
lockfspl 48 34 0 32 1 0 1 1 0 8 0
sessionpl 144 20 0 7 1 0 1 1 0 8 0
pgrppl 48 20 0 7 1 0 1 1 0 8 0
ucredpl 96 259 0 247 1 0 1 1 0 8 0
zombiepl 144 1023 0 1023 2 1 1 1 0 8 1
processpl 1064 933 0 896 3 0 3 3 0 8 0
procpl 672 1949 0 1904 5 0 5 5 0 8 0
srpgc 96 2 0 2 1 0 1 1 0 8 1
sosppl 168 1 0 1 1 1 0 1 0 8 0
sockpl 480 870 0 845 28 16 12 20 0 8 8
mcl64k 65536 7 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 3 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 8 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 233 0 0 29 0 29 29 0 8 0
mtagpl 96 19 0 0 1 0 1 1 0 8 0
mbufpl 256 291 0 0 18 0 18 18 0 8 0
bufpl 288 4244 0 141 294 0 294 294 0 8 0
anonpl 24 235940 0 219634 131 2 129 129 0 186 23
amapchunkpl 152 24055 0 23386 35 4 31 31 0 158 1
amappl16 200 2705 0 2206 40 0 40 40 0 8 13
amappl15 192 165 0 164 1 0 1 1 0 8 0
amappl14 184 3 0 1 1 0 1 1 0 8 0
amappl13 176 42 0 40 1 0 1 1 0 8 0
amappl12 168 17 0 15 1 0 1 1 0 8 0
amappl11 160 376 0 359 1 0 1 1 0 8 0
amappl10 152 202 0 193 1 0 1 1 0 8 0
amappl9 144 486 0 484 1 0 1 1 0 8 0
amappl8 136 382 0 346 2 0 2 2 0 8 0
amappl7 128 79 0 69 1 0 1 1 0 8 0
amappl6 120 155 0 139 1 0 1 1 0 8 0
amappl5 112 793 0 774 1 0 1 1 0 8 0
amappl4 104 1090 0 1066 1 0 1 1 0 8 0
amappl3 96 188 0 170 1 0 1 1 0 8 0
amappl2 88 373 0 334 2 1 1 2 0 8 0
amappl1 80 19435 0 18970 13 2 11 13 0 8 0
amappl 88 9734 0 9566 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 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 72 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 918 0 896 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 918 0 896 1 0 1 1 0 8 0
vmmpekpl 168 10221 0 10192 2 0 2 2 0 8 0
vmmpepl 168 86050 0 84156 117 15 102 104 0 357 16
vmsppl 368 917 0 896 3 0 3 3 0 8 0
rwobjpl 56 25564 0 20954 69 0 69 69 0 8 0
pdppl 4096 1844 0 1792 74 20 54 62 0 8 2
pvpl 32 478544 0 458766 209 4 205 205 0 265 34
pmappl 248 917 0 896 2 0 2 2 0 8 0
extentpl 40 57 0 38 1 0 1 1 0 8 0
phpool 112 656 0 36 18 0 18 18 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffffffff8279bff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8292d388) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8292d388) at __mp_lock+0x122 sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff8292d388,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416
yield() at yield+0x5a sys/kern/sched_bsd.c:291
pool_get(ffffffff8292e8d0,1) at pool_get+0x199 sys/kern/subr_pool.c:591
uvm_mapent_alloc(fffffd8068e81740,0) at uvm_mapent_alloc+0x2c9 sys/uvm/uvm_map.c:1779
uvm_map_mkentry(fffffd8068e81740,fffffd806820f658,fffffd806820f658,9c43f249000,1000,0,21dccea07d2e80af,1000) at uvm_map_mkentry+0x75 sys/uvm/uvm_map.c:1684
uvm_mapent_clone(fffffd8068e81740,9c43f249000,1000,0,1,7,1e498d7b8d51e7d6,fffffd8068202838,1000,fffffd8068e81740) at uvm_mapent_clone+0x9b sys/uvm/uvm_map.c:3814
uvm_mapent_forkcopy(1,fffffd8068e81740,fffffd8008586450,fffffd8068202838,ffff8000212765b0) at uvm_mapent_forkcopy+0x60 sys/uvm/uvm_map.c:3915
uvmspace_fork(ffff8000211f10b0) at uvmspace_fork+0x23d
process_new(ffff8000ffff5a48,ffff8000211f10b0,1) at process_new+0x181 sys/kern/kern_fork.c:263
end trace frame: 0xffff800021276740, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff8279bff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8292d388) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8292d388) at __mp_lock+0x122 sys/kern/kern_lock.c:147
__mp_acquire_count(ffffffff8292d388,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416
yield() at yield+0x5a sys/kern/sched_bsd.c:291
pool_get(ffffffff8292e8d0,1) at pool_get+0x199 sys/kern/subr_pool.c:591
uvm_mapent_alloc(fffffd8068e81740,0) at uvm_mapent_alloc+0x2c9 sys/uvm/uvm_map.c:1779
uvm_map_mkentry(fffffd8068e81740,fffffd806820f658,fffffd806820f658,9c43f249000,1000,0,21dccea07d2e80af,1000) at uvm_map_mkentry+0x75 sys/uvm/uvm_map.c:1684
uvm_mapent_clone(fffffd8068e81740,9c43f249000,1000,0,1,7,1e498d7b8d51e7d6,fffffd8068202838,1000,fffffd8068e81740) at uvm_mapent_clone+0x9b sys/uvm/uvm_map.c:3814
uvm_mapent_forkcopy(1,fffffd8068e81740,fffffd8008586450,fffffd8068202838,ffff8000212765b0) at uvm_mapent_forkcopy+0x60 sys/uvm/uvm_map.c:3915
uvmspace_fork(ffff8000211f10b0) at uvmspace_fork+0x23d
process_new(ffff8000ffff5a48,ffff8000211f10b0,1) at process_new+0x181 sys/kern/kern_fork.c:263
fork1(ffff8000212377a0,1,ffffffff82306b10,0,ffff8000212767b0,0) at fork1+0x30b sys/kern/kern_fork.c:382
syscall(ffff800021276820) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021276820) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff9dc0, count: -17
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff82487574) at panic+0x177 sys/kern/subr_prf.c:202
vgonel(fffffd80714c2ac8,ffff800021236000) at vgonel+0x4f8 sys/kern/vfs_subr.c:1175
vrecycle(fffffd80714c2ac8,ffff800021236000) at vrecycle+0x54 sys/kern/vfs_subr.c:1102
ufs_inactive(ffff8000246de6e8) at ufs_inactive+0x2ae sys/ufs/ufs/ufs_inode.c:122
VOP_INACTIVE(fffffd80714c2ac8,ffff800021236000) at VOP_INACTIVE+0xc4 sys/kern/vfs_vops.c:505
vput(fffffd80714c2ac8) at vput+0xb6 sys/kern/vfs_subr.c:779
ufs_remove(ffff8000246de7e8) at ufs_remove+0x137 sys/ufs/ufs/ufs_vnops.c:618
VOP_REMOVE(fffffd80714c2828,fffffd80714c2ac8,ffff8000246de8c8) at VOP_REMOVE+0x118 sys/kern/vfs_vops.c:349
dounlinkat(ffff800021236000,ffffff9c,7f7ffffd5b90,0) at dounlinkat+0x10c sys/kern/vfs_syscalls.c:1885
syscall(ffff8000246dea40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246dea40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd6040, count: 3
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff82487574) at panic+0x177 sys/kern/subr_prf.c:202
vgonel(fffffd80714c2ac8,ffff800021236000) at vgonel+0x4f8 sys/kern/vfs_subr.c:1175
vrecycle(fffffd80714c2ac8,ffff800021236000) at vrecycle+0x54 sys/kern/vfs_subr.c:1102
ufs_inactive(ffff8000246de6e8) at ufs_inactive+0x2ae sys/ufs/ufs/ufs_inode.c:122
VOP_INACTIVE(fffffd80714c2ac8,ffff800021236000) at VOP_INACTIVE+0xc4 sys/kern/vfs_vops.c:505
vput(fffffd80714c2ac8) at vput+0xb6 sys/kern/vfs_subr.c:779
ufs_remove(ffff8000246de7e8) at ufs_remove+0x137 sys/ufs/ufs/ufs_vnops.c:618
VOP_REMOVE(fffffd80714c2828,fffffd80714c2ac8,ffff8000246de8c8) at VOP_REMOVE+0x118 sys/kern/vfs_vops.c:349
dounlinkat(ffff800021236000,ffffff9c,7f7ffffd5b90,0) at dounlinkat+0x10c sys/kern/vfs_syscalls.c:1885
syscall(ffff8000246dea40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000246dea40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd6040, count: -12