uvm_fault(0xfffffd8065088c18, 0x18, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at checkalias+0xb7: movl 0x18(%r13),%ebx
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*148791 32585 0 0x8000000 0x4000000 0K syz-executor
276533 86235 0 0x8000002 0 1 syz-executor
checkalias(fffffd8059b4d210,24900,0) at checkalias+0xb7 sys/kern/vfs_subr.c:564
cdevvp(24900,ffff8000371b7e10) at cdevvp+0xd2 sys/kern/vfs_subr.c:507
spec_open_clone(ffff8000371b7ee8) at spec_open_clone+0x1ee sys/kern/spec_vnops.c:711
spec_open(ffff8000371b7ee8) at spec_open+0x326 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806f23c968,83,fffffd807f7d37b8,ffff80002a03f970) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff8000371b8138,83,0) at vn_open+0x708 sys/kern/vfs_vnops.c:177
doopenat(ffff80002a03f970,ffffff9c,20000700,82,0,ffff8000371b82e0) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123
syscall(ffff8000371b8390) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371b8390) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x26890ab7a0, count: 6
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: uvm_fault(0xfffffd8065088c18, 0x18, 0, 1) -> e
ddb{0}> trace
checkalias(fffffd8059b4d210,24900,0) at checkalias+0xb7 sys/kern/vfs_subr.c:564
cdevvp(24900,ffff8000371b7e10) at cdevvp+0xd2 sys/kern/vfs_subr.c:507
spec_open_clone(ffff8000371b7ee8) at spec_open_clone+0x1ee sys/kern/spec_vnops.c:711
spec_open(ffff8000371b7ee8) at spec_open+0x326 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806f23c968,83,fffffd807f7d37b8,ffff80002a03f970) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff8000371b8138,83,0) at vn_open+0x708 sys/kern/vfs_vnops.c:177
doopenat(ffff80002a03f970,ffffff9c,20000700,82,0,ffff8000371b82e0) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123
syscall(ffff8000371b8390) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371b8390) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x26890ab7a0, count: -9
ddb{0}> show registers
rdi 0xffff80002a167000
rsi 0x9de
rbp 0xffff8000371b7d90
rbx 0x14900 acpi_pdirpa+0x771
rdx 0xffff80002a167000
rcx 0x9dd
rax 0xffffffff8240a8e3 checkalias+0x183
r8 0
r9 0xffffffffffffffff
r10 0xb4c6291c5dd2c591
r11 0x54c54ee48888bc35
r12 0x24900 acpi_pdirpa+0x10771
r13 0
r14 0x24900 acpi_pdirpa+0x10771
r15 0xfffffd80631d51d0
rip 0xffffffff8240a817 checkalias+0xb7
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff8000371b7d20
ss 0x10
checkalias+0xb7: movl 0x18(%r13),%ebx
ddb{0}> show proc
PROC (syz-executor) tid=148791 pid=32585 tcnt=2 stat=onproc
flags process=8000000<PIN> proc=4000000<THREAD>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a03e7b8,0xffffffff83627228
process=0xffff800029fe96b0 user=0xffff8000371b3000, vmspace=0xfffffd8065088c18
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
32585 162580 83112 0 3 0x8000080 fsleep syz-executor
*32585 148791 83112 0 7 0xc000000 syz-executor
12447 268431 905 0 3 0x8000080 fsleep syz-executor
12447 353212 905 0 3 0xc000080 netcon syz-executor
65091 284600 16511 0 3 0x8000080 fsleep syz-executor
65091 141552 16511 0 3 0xc000080 sbwait syz-executor
74065 489491 44630 0 3 0x8000080 fsleep syz-executor
74065 267914 44630 0 3 0xc000080 ttyin syz-executor
46944 338322 76456 0 3 0x8000080 fsleep syz-executor
46944 352478 76456 0 3 0xc000080 kqread syz-executor
86945 217083 33667 0 3 0x8000080 fsleep syz-executor
86945 6947 33667 0 3 0xc000080 pipewr syz-executor
75285 387502 89932 0 3 0x8000080 fsleep syz-executor
75285 439493 89932 0 3 0xc000080 bell syz-executor
86235 276533 85868 0 7 0x8000002 syz-executor
44630 237569 85868 0 2 0x8000482 syz-executor
905 14398 85868 0 2 0x8000482 syz-executor
33667 288442 85868 0 3 0x8000082 nanoslp syz-executor
89932 377795 85868 0 2 0x8000482 syz-executor
76456 126763 85868 0 3 0x8000082 nanoslp syz-executor
83112 488495 85868 0 3 0x8000082 nanoslp syz-executor
16511 56222 85868 0 3 0x8000082 nanoslp syz-executor
82216 279433 1 0 3 0x18100083 ttyin getty
69011 507739 0 0 3 0x14200 bored sosplice
85868 474857 77565 0 3 0x8000082 kqread syz-executor
77565 82175 58713 0 3 0x810008a sigsusp ksh
58713 344755 26291 0 3 0x18000098 kqread sshd-session
26291 268887 28299 0 3 0x18000092 kqread sshd-session
28299 494550 1 0 3 0x18000088 kqread sshd
4497 499743 79320 74 3 0x19100092 bpf pflogd
79320 42880 1 0 3 0x18000080 sbwait pflogd
56040 8898 18354 73 2 0x19100010 syslogd
18354 501812 1 0 3 0x18100082 sbwait syslogd
47248 124572 1 0 3 0x18100080 kqread resolvd
43498 198644 3713 77 3 0x18100092 kqread dhcpleased
91501 255232 3713 77 3 0x18100092 kqread dhcpleased
3713 199529 1 0 3 0x18000080 kqread dhcpleased
53104 125077 0 0 3 0x14200 bored smr
92952 410356 0 0 3 0x14200 pgzero zerothread
71966 475138 0 0 3 0x14200 aiodoned aiodoned
114 420877 0 0 3 0x14200 syncer update
1635 129546 0 0 3 0x14200 cleaner cleaner
92309 143433 0 0 3 0x14200 reaper reaper
18674 349678 0 0 3 0x14200 pgdaemon pagedaemon
16058 498715 0 0 3 0x14200 bored viomb
69627 3436 0 0 3 0x40014200 acpi0 acpi0
3868 306788 0 0 3 0x40014200 idle1
26112 136618 0 0 3 0x14200 bored softnet3
79431 412209 0 0 3 0x14200 bored softnet2
87799 457578 0 0 3 0x14200 bored softnet1
27127 169234 0 0 3 0x14200 bored softnet0
39983 337883 0 0 3 0x14200 bored systqmp
54585 95907 0 0 3 0x14200 bored systq
7522 32712 0 0 3 0x14200 tmoslp softclockmp
75276 160590 0 0 3 0x40014200 tmoslp softclock
35627 270948 0 0 3 0x40014200 idle0
1 70477 0 0 3 0x8000082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 32585 (syz-executor) thread 0xffff80002a03f970 (148791)
exclusive rrwlock inode r = 0 (0xfffffd806f1e1928)
#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 vget+0x2bd sys/kern/vfs_subr.c:676
#6 cache_lookup+0x36e sys/kern/vfs_cache.c:222
#7 ufs_lookup+0x218 sys/ufs/ufs/ufs_lookup.c:160
#8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
#10 namei+0x7aa sys/kern/vfs_lookup.c:250
#11 vn_open+0x13f sys/kern/vfs_vnops.c:140
#12 doopenat+0x31d sys/kern/vfs_syscalls.c:1123
#13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#14 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835f0020)
#0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1 syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#1 syscall+0xad6 sys/arch/amd64/amd64/trap.c:577
#2 Xsyscall+0x128
Process 86235 (syz-executor) thread 0xffff80002a095470 (276533)
exclusive rrwlock inode r = 0 (0xfffffd8063957d58)
#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 vget+0x2bd sys/kern/vfs_subr.c:676
#6 ufs_ihashget+0x171 sys/ufs/ufs/ufs_ihash.c:95
#7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201
#8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478
#9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
#11 namei+0x7aa sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852
#13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806be6c708)
#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 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
#6 namei+0x7aa sys/kern/vfs_lookup.c:250
#7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852
#8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#9 Xsyscall+0x128
Process 56040 (syslogd) thread 0xffff8000ffffdbe8 (8898)
exclusive rrwlock inode r = 0 (0xfffffd806e49b2c0)
#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
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10234 10319K 10682K 166960K 13684 0
pcb 18 16K 18K 166960K 433 0
rtable 238 15K 16K 166960K 3345 0
pf 42 19K 23K 166960K 354 0
ifaddr 44 9K 9K 166960K 464 0
ifgroup 63 2K 2K 166960K 517 0
sysctl 3 0K 0K 166960K 5 0
counters 68 36K 37K 166960K 306 0
ioctlops 0 0K 4K 166960K 1859 0
iov 0 0K 28K 166960K 67 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1457 92K 92K 166960K 4006 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 24 0
VM map 2 1K 1K 166960K 2 0
sem 29 2K 2K 166960K 31 0
dirhash 15 2K 3K 166960K 51 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 17 61K 93K 166960K 2529 0
sigio 0 0K 0K 166960K 29 0
proc 70 91K 140K 166960K 3299 0
subproc 104 6K 6K 166960K 1339 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 2 0K 0K 166960K 138 0
in_multi 98 7K 7K 166960K 1177 0
ether_multi 1 0K 0K 166960K 7 0
mrt 1 0K 0K 166960K 5 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 229 1023K 1023K 166960K 229 0
exec 0 0K 1K 166960K 1753 0
pfkey data 0 0K 0K 166960K 2 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 252 110K 112K 166960K 19633 0
UVM aobj 123 7K 7K 166960K 124 0
pinsyscall 42 84K 106K 166960K 6080 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 53 0
NDP 24 1K 2K 166960K 339 0
temp 69 6818K 6953K 166960K 127396 0
kqueue 14 22K 28K 166960K 174 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 120 453 0 448 5 4 1 3 0 8 0
rtentry 112 1191 0 1084 7 3 4 4 0 8 0
unpcb 144 1357 0 1333 23 21 2 6 0 8 1
syncache 336 6 0 6 3 3 0 1 0 8 0
tcpcb 808 428 0 421 10 9 1 4 0 8 0
arp 120 211 0 193 1 0 1 1 0 8 0
inpcb 336 2355 0 2343 45 43 2 7 0 8 0
nd6 136 327 0 303 1 0 1 1 0 8 0
pkpcb 40 5 0 5 2 2 0 1 0 8 0
kcovpl 48 103 0 95 1 0 1 1 0 8 0
ppxss 1168 15 0 15 7 6 1 1 0 8 1
pfstscr 40 5 0 4 1 0 1 1 0 8 0
pffrag 232 13 0 10 1 0 1 1 0 482 0
pffrnode 88 13 0 10 1 0 1 1 0 8 0
pffrent 40 61 0 58 2 1 1 1 0 8 0
pfosfp 40 1498 0 1071 5 0 5 5 0 8 0
pfosfpen 112 1498 0 779 21 0 21 21 0 8 0
pfrktable 1344 4 0 4 2 2 0 1 0 8 0
pfanchor 1288 7 0 1 1 0 1 1 0 8 0
pftag 88 5 0 4 3 2 1 1 0 8 0
pfstitem 24 196 0 161 1 0 1 1 0 8 0
pfstkey 128 206 0 169 2 0 2 2 0 8 0
pfstate 376 198 0 165 6 1 5 5 0 8 0
pfrule 1344 40 0 33 2 1 1 2 0 8 0
art_heap8 4096 2 0 1 2 0 2 2 0 8 1
art_heap4 256 4750 0 4292 41 12 29 30 0 8 0
art_table 32 4752 0 4293 5 1 4 4 0 8 0
art_node 16 1187 0 1091 1 0 1 1 0 8 0
sysvmsgpl 40 10 0 3 2 1 1 1 0 8 0
semapl 112 27 0 0 1 0 1 1 0 8 0
shmpl 112 121 0 1 4 0 4 4 0 8 0
dirhash 1024 43 0 24 3 0 3 3 0 8 0
dino2pl 256 3881 0 2194 107 0 107 107 0 8 0
ffsino 272 3881 0 2194 115 1 114 114 0 8 0
nchpl 144 5565 0 3755 68 0 68 68 0 8 0
uvmvnodes 80 6076 0 0 124 0 124 124 0 8 0
vnodes 216 6076 0 0 338 0 338 338 0 8 0
vnodes: pool(0xffffffff835a97b0:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd80631d5f90 (p 0xfffffd80631d5000)
namei 1024 30483 0 30483 7 6 1 2 0 8 1
percpumem 16 167 0 119 1 0 1 1 0 8 0
vcpupl 3904 6 0 1 1 0 1 1 0 8 0
vmpool 696 9 0 4 1 0 1 1 0 8 0
pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0
kstatmem 264 266 0 238 3 1 2 3 0 8 0
scsiplug 72 3 0 3 3 3 0 1 0 8 0
scxspl 216 62523 0 62523 17 16 1 8 1 8 1
plimitpl 152 562 0 544 1 0 1 1 0 8 0
sigapl 424 2642 0 2592 10 3 7 7 0 8 0
futexpl 64 27934 0 27927 9 8 1 1 0 8 0
knotepl 120 471 0 0 12 1 11 12 0 8 0
kqueuepl 216 497 0 484 11 10 1 5 0 8 0
pipepl 320 500 0 472 3 0 3 3 0 8 0
fdescpl 496 2622 0 2591 8 3 5 5 0 8 0
filepl 152 16098 0 15827 46 34 12 18 0 8 1
lockfpl 104 670 0 667 2 1 1 2 0 8 0
lockfspl 48 255 0 252 1 0 1 1 0 8 0
sessionpl 144 120 0 111 1 0 1 1 0 8 0
pgrppl 48 246 0 229 1 0 1 1 0 8 0
ucredpl 104 2841 0 2828 1 0 1 1 0 8 0
zombiepl 144 2592 0 2592 1 0 1 1 0 8 1
processpl 1160 2642 0 2592 5 1 4 5 0 8 0
procpl 648 4431 0 4374 8 2 6 7 0 8 0
srpgc 96 17 0 17 5 5 0 1 0 8 0
sosppl 168 6 0 6 3 3 0 1 0 8 0
sockpl 664 4180 0 4139 65 59 6 15 0 8 2
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 302 0 0 30 1 29 30 0 8 1
mtagpl 96 11 0 0 1 0 1 1 0 8 0
mbufpl 256 1044 0 0 54 0 54 54 0 8 0
bufpl 280 10999 0 2804 586 0 586 586 0 8 0
anonpl 24 417171 0 404583 160 54 106 129 0 185 2
amapchunkpl 152 61890 0 61277 66 30 36 42 0 158 10
amappl16 200 7549 0 7077 52 13 39 39 0 8 0
amappl15 192 8 0 8 2 2 0 1 0 8 0
amappl14 184 311 0 298 1 0 1 1 0 8 0
amappl13 176 5 0 5 1 1 0 1 0 8 0
amappl12 168 4790 0 4759 4 2 2 3 0 8 0
amappl11 160 58 0 44 1 0 1 1 0 8 0
amappl10 152 19 0 19 1 1 0 1 0 8 0
amappl9 144 136 0 135 1 0 1 1 0 8 0
amappl8 136 95 0 92 1 0 1 1 0 8 0
amappl7 128 299 0 287 1 0 1 1 0 8 0
amappl6 120 1115 0 1114 1 0 1 1 0 8 0
amappl5 112 517 0 505 1 0 1 1 0 8 0
amappl4 104 615 0 594 1 0 1 1 0 8 0
amappl3 96 11639 0 11521 5 1 4 4 0 8 0
amappl2 88 1959 0 1893 2 0 2 2 0 8 0
amappl1 80 20716 0 20134 16 2 14 15 0 8 0
amappl 88 18500 0 18317 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 72 123 0 1 3 0 3 3 0 8 0
uaddrrnd 24 2631 0 2595 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2631 0 2595 1 0 1 1 0 8 0
vmmpekpl 168 23055 0 23011 3 0 3 3 0 8 0
vmmpepl 168 195765 0 193418 153 29 124 124 0 357 13
vmsppl 440 2630 0 2595 7 2 5 5 0 8 0
rwobjpl 56 55127 0 47523 111 3 108 108 0 8 0
pdppl 4096 5269 0 5195 216 137 79 85 0 8 5
pvpl 32 46727 0 0 378 1 377 377 0 265 0
pmappl 248 2630 0 2595 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 647 0 220 13 0 13 13 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
checkalias(fffffd8059b4d210,24900,0) at checkalias+0xb7 sys/kern/vfs_subr.c:564
cdevvp(24900,ffff8000371b7e10) at cdevvp+0xd2 sys/kern/vfs_subr.c:507
spec_open_clone(ffff8000371b7ee8) at spec_open_clone+0x1ee sys/kern/spec_vnops.c:711
spec_open(ffff8000371b7ee8) at spec_open+0x326 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806f23c968,83,fffffd807f7d37b8,ffff80002a03f970) at VOP_OPEN+0x8b sys/kern/vfs_vops.c:138
vn_open(ffff8000371b8138,83,0) at vn_open+0x708 sys/kern/vfs_vnops.c:177
doopenat(ffff80002a03f970,ffffff9c,20000700,82,0,ffff8000371b82e0) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123
syscall(ffff8000371b8390) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff8000371b8390) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x26890ab7a0, count: -9
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
__mp_lock(ffffffff835efe18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835efe18) at __mp_lock+0x192 sys/kern/kern_lock.c:144
__mp_acquire_count(ffffffff835efe18,1) at __mp_acquire_count+0x58
mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460
sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416
biowait(fffffd8061ef7c48) at biowait+0xc1 sys/kern/vfs_bio.c:1254
bwrite(fffffd8061ef7c48) at bwrite+0x2e2 sys/kern/vfs_bio.c:766
ufs_dirremove(fffffd807aec4528,fffffd8063957cc0,800c,1) at ufs_dirremove+0x2a9 sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a09f078) at ufs_rmdir+0x287 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(fffffd807aec4528,fffffd8059b4d138,ffff80002a09f158) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a095470,ffffff9c,70f881d026b0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1885
syscall(ffff80002a09f2d0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a09f2d0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
end trace frame: 0xffff80002a09f350, count: 0
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
__mp_lock(ffffffff835efe18) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff835efe18) at __mp_lock+0x192 sys/kern/kern_lock.c:144
__mp_acquire_count(ffffffff835efe18,1) at __mp_acquire_count+0x58
mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460
sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416
biowait(fffffd8061ef7c48) at biowait+0xc1 sys/kern/vfs_bio.c:1254
bwrite(fffffd8061ef7c48) at bwrite+0x2e2 sys/kern/vfs_bio.c:766
ufs_dirremove(fffffd807aec4528,fffffd8063957cc0,800c,1) at ufs_dirremove+0x2a9 sys/ufs/ufs/ufs_lookup.c:919
ufs_rmdir(ffff80002a09f078) at ufs_rmdir+0x287 sys/ufs/ufs/ufs_vnops.c:1248
VOP_RMDIR(fffffd807aec4528,fffffd8059b4d138,ffff80002a09f158) at VOP_RMDIR+0x19a sys/kern/vfs_vops.c:413
dounlinkat(ffff80002a095470,ffffff9c,70f881d026b0,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1885
syscall(ffff80002a09f2d0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a09f2d0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x70f881d026a0, count: -15