uvm_fault(0xfffffd8065d7d1c8, 0x18, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at checkalias+0xa7: movl 0x18(%r13),%ebx
TID PID UID PRFLAGS PFLAGS CPU COMMAND
363328 33595 0 0x8000000 0 0 syz-executor.4
*301346 33595 0 0x8000000 0x4000000 1K syz-executor.4
checkalias(fffffd80673d5b58,31700,0) at checkalias+0xa7 sys/kern/vfs_subr.c:564
cdevvp(31700,ffff80002c6b9b50) at cdevvp+0x9c getdevvp sys/kern/vfs_subr.c:533 [inline]
cdevvp(31700,ffff80002c6b9b50) at cdevvp+0x9c sys/kern/vfs_subr.c:507
spec_open_clone(ffff80002c6b9c28) at spec_open_clone+0x18f sys/kern/spec_vnops.c:711
spec_open(ffff80002c6b9c28) at spec_open+0x242 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806f0e46f0,1,fffffd807f7d76e8,ffff8000373a6550) at VOP_OPEN+0x76 sys/kern/vfs_vops.c:138
vn_open(ffff80002c6b9e78,1,0) at vn_open+0x4e4 sys/kern/vfs_vnops.c:177
doopenat(ffff8000373a6550,ffffff9c,20000040,0,0,ffff80002c6ba020) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff80002c6ba0d0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002c6ba0d0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5191a50e3b0, 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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xfffffd8065d7d1c8, 0x18, 0, 1) -> e
ddb{1}> trace
checkalias(fffffd80673d5b58,31700,0) at checkalias+0xa7 sys/kern/vfs_subr.c:564
cdevvp(31700,ffff80002c6b9b50) at cdevvp+0x9c getdevvp sys/kern/vfs_subr.c:533 [inline]
cdevvp(31700,ffff80002c6b9b50) at cdevvp+0x9c sys/kern/vfs_subr.c:507
spec_open_clone(ffff80002c6b9c28) at spec_open_clone+0x18f sys/kern/spec_vnops.c:711
spec_open(ffff80002c6b9c28) at spec_open+0x242 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806f0e46f0,1,fffffd807f7d76e8,ffff8000373a6550) at VOP_OPEN+0x76 sys/kern/vfs_vops.c:138
vn_open(ffff80002c6b9e78,1,0) at vn_open+0x4e4 sys/kern/vfs_vnops.c:177
doopenat(ffff8000373a6550,ffffff9c,20000040,0,0,ffff80002c6ba020) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff80002c6ba0d0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002c6ba0d0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5191a50e3b0, count: -9
ddb{1}> show registers
rdi 0xffff800032949000
rsi 0xd2e
rbp 0xffff80002c6b9ad0
rbx 0x41700 acpi_pdirpa+0x2d571
rdx 0xffff800032949000
rcx 0xd2d
rax 0xffffffff8117e713 checkalias+0x143
r8 0
r9 0xffffffffffffffff
r10 0x29f0ffe58edac657
r11 0x4c1c074b8cd43aad
r12 0x31700 acpi_pdirpa+0x1d571
r13 0
r14 0x31700 acpi_pdirpa+0x1d571
r15 0xfffffd8066e8edd8
rip 0xffffffff8117e677 checkalias+0xa7
cs 0x8
rflags 0x10246 __ALIGN_SIZE+0xf246
rsp 0xffff80002c6b9a60
ss 0x10
checkalias+0xa7: movl 0x18(%r13),%ebx
ddb{1}> show proc
PROC (syz-executor.4) tid=301346 pid=33595 tcnt=2 stat=onproc
flags process=8000000 proc=4000000<THREAD>
runpri=32, usrpri=69, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0xffffffffffffffff, list=0xffff80002a1a8020,0xffff8000373a6fa0
process=0xffff8000ffff4488 user=0xffff80002c6b5000, vmspace=0xfffffd8065d7d1c8
estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
33595 363328 87237 0 7 0x8000000 syz-executor.4
*33595 301346 87237 0 7 0xc000000 syz-executor.4
82577 461075 62885 0 2 0x8000000 syz-executor.3
82577 464269 62885 0 2 0xc000000 syz-executor.3
12063 39999 84388 0 2 0x8000000 syz-executor.6
12063 446504 84388 0 2 0xc000000 syz-executor.6
74079 27208 96000 0 2 0x8000000 syz-executor.1
74079 197611 96000 0 2 0xc000000 syz-executor.1
33394 139456 2307 0 2 0x8000000 syz-executor.7
33394 336764 2307 0 3 0xc000080 kqpoll syz-executor.7
89772 392810 31623 0 3 0x8000080 nanoslp syz-executor.5
89772 504255 31623 0 3 0xc000080 sbwait syz-executor.5
89772 150603 31623 0 3 0xc000080 fsleep syz-executor.5
48805 353070 90080 0 3 0x8000080 nanoslp syz-executor.0
48805 26789 90080 0 3 0xc000080 netio syz-executor.0
48805 160667 90080 0 3 0xc000080 fsleep syz-executor.0
92490 287837 80916 0 3 0x8000080 nanoslp syz-executor.2
92490 445313 80916 0 3 0xc000080 bell syz-executor.2
92490 286380 80916 0 3 0xc000080 fsleep syz-executor.2
87237 141452 44713 0 3 0x8000082 nanoslp syz-executor.4
80916 310921 44713 0 3 0x8000082 nanoslp syz-executor.2
2307 91312 44713 0 3 0x8000082 nanoslp syz-executor.7
84388 428857 44713 0 3 0x8000082 nanoslp syz-executor.6
31623 261848 44713 0 3 0x8000082 nanoslp syz-executor.5
96000 281198 44713 0 3 0x8000082 nanoslp syz-executor.1
1799 41589 1 0 3 0x18100083 ttyin getty
84223 422453 0 0 3 0x14200 bored sosplice
62885 342983 44713 0 3 0x8000082 nanoslp syz-executor.3
90080 16642 44713 0 3 0x8000082 nanoslp syz-executor.0
44713 78724 82374 0 2 0x1a000002 syz-fuzzer
44713 403501 82374 0 3 0x1e000082 nanoslp syz-fuzzer
44713 519321 82374 0 3 0x1e000082 wait syz-fuzzer
44713 46191 82374 0 3 0x1e000082 wait syz-fuzzer
44713 510110 82374 0 3 0x1e000082 wait syz-fuzzer
44713 390404 82374 0 3 0x1e000082 thrsleep syz-fuzzer
44713 25694 82374 0 3 0x1e000082 wait syz-fuzzer
44713 69886 82374 0 3 0x1e000082 wait syz-fuzzer
44713 36522 82374 0 3 0x1e000082 thrsleep syz-fuzzer
44713 492682 82374 0 3 0x1e000082 thrsleep syz-fuzzer
44713 342403 82374 0 3 0x1e000082 thrsleep syz-fuzzer
44713 420070 82374 0 3 0x1e000082 kqread syz-fuzzer
44713 461327 82374 0 3 0x1e000082 thrsleep syz-fuzzer
44713 165638 82374 0 3 0x1e000082 wait syz-fuzzer
44713 193416 82374 0 3 0x1e000082 wait syz-fuzzer
44713 460259 82374 0 3 0x1e000082 wait syz-fuzzer
82374 281934 9049 0 3 0x810008a sigsusp ksh
9049 291900 28747 0 3 0x1800009a kqread sshd
28747 224838 1 0 3 0x18000088 kqread sshd
72763 47018 7607 74 3 0x19100092 bpf pflogd
7607 62823 1 0 3 0x18000080 sbwait pflogd
93754 162668 96526 73 3 0x19100090 kqread syslogd
96526 177553 1 0 3 0x18100082 sbwait syslogd
305 120091 1 0 3 0x18100080 kqread resolvd
54721 90135 69581 77 3 0x18100092 kqread dhcpleased
94253 101791 69581 77 3 0x18100092 kqread dhcpleased
69581 492208 1 0 3 0x18000080 kqread dhcpleased
71204 245576 0 0 3 0x14200 bored smr
20692 161391 0 0 2 0x14200 zerothread
5865 463391 0 0 3 0x14200 aiodoned aiodoned
68930 440326 0 0 3 0x14200 syncer update
69477 463537 0 0 3 0x14200 cleaner cleaner
8518 58621 0 0 3 0x14200 reaper reaper
61112 402039 0 0 3 0x14200 pgdaemon pagedaemon
39945 59188 0 0 3 0x14200 bored viomb
6719 75494 0 0 3 0x40014200 acpi0 acpi0
35578 134332 0 0 3 0x40014200 idle1
85380 289065 0 0 3 0x14200 bored softnet3
56858 265379 0 0 3 0x14200 bored softnet2
11129 432847 0 0 3 0x14200 bored softnet1
85555 116997 0 0 3 0x14200 bored softnet0
76136 57051 0 0 3 0x14200 bored systqmp
59665 114918 0 0 3 0x14200 bored systq
97656 305532 0 0 3 0x14200 tmoslp softclockmp
72361 155880 0 0 3 0x40014200 tmoslp softclock
88167 501546 0 0 3 0x40014200 idle0
1 59527 0 0 3 0x8080082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 33595 (syz-executor.4) thread 0xffff8000373a6550 (301346)
exclusive rrwlock inode r = 0 (0xfffffd80785d9700)
#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+0x32a sys/kern/kern_rwlock.c:309
#2 rrw_enter+0x8e 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 vget+0x1fd sys/kern/vfs_subr.c:676
#6 cache_lookup+0x2b3 sys/kern/vfs_cache.c:222
#7 ufs_lookup+0x1b2 sys/ufs/ufs/ufs_lookup.c:160
#8 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85
#9 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:566
#10 namei+0x56a sys/kern/vfs_lookup.c:250
#11 vn_open+0x101 sys/kern/vfs_vnops.c:140
#12 doopenat+0x269 sys/kern/vfs_syscalls.c:1126
#13 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
#13 syscall+0x854 sys/arch/amd64/amd64/trap.c:577
#14 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82db7550)
#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
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10195 6487K 6747K 166960K 12262 0
pcb 15 10K 10K 166960K 204 0
rtable 194 10K 10K 166960K 865 0
pf 37 10K 10K 166960K 125 0
ifaddr 41 14K 16K 166960K 124 0
ifgroup 66 2K 2K 166960K 201 0
sysctl 3 0K 1K 166960K 5 0
counters 68 36K 37K 166960K 136 0
ioctlops 0 0K 4K 166960K 1548 0
iov 0 0K 16K 166960K 118 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1371 86K 87K 166960K 2224 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 29 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 54 0
dirhash 12 2K 2K 166960K 24 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 18 65K 93K 166960K 1884 0
sigio 0 0K 0K 166960K 74 0
proc 71 91K 115K 166960K 996 0
subproc 104 6K 7K 166960K 287 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 278 0
in_multi 76 5K 7K 166960K 278 0
ether_multi 1 0K 0K 166960K 11 0
mrt 1 0K 0K 166960K 9 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 85 387K 387K 166960K 85 0
exec 0 0K 1K 166960K 701 0
pfkey data 0 0K 0K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 360 87K 98K 166960K 18803 0
UVM aobj 75 5K 5K 166960K 87 0
pinsyscall 42 84K 108K 166960K 3405 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 195 0
NDP 16 0K 2K 166960K 86 0
temp 75 6812K 6884K 166960K 41232 0
kqueue 13 20K 27K 166960K 267 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> 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 120 189 0 186 1 0 1 1 0 8 0
rtentry 112 283 0 196 4 1 3 4 0 8 0
unpcb 144 1322 0 1298 6 5 1 2 0 8 0
syncache 336 36 0 36 9 8 1 1 0 8 1
tcpqe 32 333 0 333 8 7 1 1 0 8 1
tcpcb 808 620 0 597 5 2 3 3 0 8 0
arp 120 54 0 41 1 0 1 1 0 8 0
ipq 40 2 0 2 1 1 0 1 0 8 0
ipqe 40 6 0 6 1 1 0 1 0 8 0
inpcb 392 1938 0 1907 7 3 4 4 0 8 0
nd6 136 59 0 41 1 0 1 1 0 8 0
pkpcb 40 8 0 8 4 3 1 1 0 8 1
kcovpl 48 22 0 14 1 0 1 1 0 8 0
ppxss 1168 5 0 5 4 4 0 1 0 8 0
pffrag 232 14 0 8 1 0 1 1 0 482 0
pffrnode 88 14 0 8 1 0 1 1 0 8 0
pffrent 40 21 0 15 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 24 131 0 83 1 0 1 1 0 8 0
pfstkey 128 131 0 83 2 0 2 2 0 8 0
pfstate 376 131 0 83 7 1 6 6 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 2 0 1 2 1 1 2 0 8 0
art_heap4 256 980 0 611 34 10 24 29 0 8 0
art_table 32 982 0 612 4 1 3 4 0 8 0
art_node 16 276 0 198 1 0 1 1 0 8 0
sysvmsgpl 40 10 0 8 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 51 0 41 1 0 1 1 0 8 0
shmpl 112 84 0 12 3 0 3 3 0 8 0
dirhash 1024 25 0 8 3 0 3 3 0 8 0
dino2pl 256 4290 0 2768 96 0 96 96 0 8 0
ffsino 272 4290 0 2768 103 0 103 103 0 8 0
nchpl 144 7110 0 5366 67 0 67 67 0 8 0
uvmvnodes 80 4901 0 0 101 0 101 101 0 8 0
vnodes 216 4901 0 0 273 0 273 273 0 8 0
vnodes: pool(0xffffffff82d68dd8:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd8066e8ef90 (p 0xfffffd8066e8e000)
namei 1024 22842 0 22842 5 4 1 2 0 8 1
percpumem 16 82 0 34 1 0 1 1 0 8 0
vcpupl 2048 9 0 1 1 0 1 1 0 8 0
vmpool 696 14 0 6 1 0 1 1 0 8 0
kstatmem 264 96 0 68 3 1 2 3 0 8 0
scxspl 216 22361 0 22361 19 16 3 8 1 8 3
plimitpl 152 245 0 227 1 0 1 1 0 8 0
sigapl 424 2211 0 2161 8 1 7 8 0 8 0
futexpl 64 24401 0 24398 1 0 1 1 0 8 0
knotepl 120 401 0 0 11 0 11 11 0 8 0
kqueuepl 216 411 0 401 2 1 1 2 0 8 0
pipepl 320 428 0 400 5 2 3 4 0 8 0
fdescpl 496 2170 0 2139 7 2 5 5 0 8 1
filepl 152 11954 0 11686 12 1 11 12 0 8 0
lockfpl 104 369 0 367 1 0 1 1 0 8 0
lockfspl 48 161 0 159 1 0 1 1 0 8 0
sessionpl 144 37 0 20 1 0 1 1 0 8 0
pgrppl 48 71 0 54 1 0 1 1 0 8 0
ucredpl 104 1836 0 1823 1 0 1 1 0 8 0
zombiepl 144 2161 0 2161 2 1 1 1 0 8 1
processpl 1136 2211 0 2161 6 1 5 6 0 8 0
procpl 656 4294 0 4218 9 2 7 9 0 8 0
srpgc 96 22 0 22 5 5 0 1 0 8 0
sosppl 168 63 0 56 5 4 1 1 0 8 0
sockpl 584 3474 0 3415 8 3 5 5 0 8 0
mcl64k 65536 13 0 0 2 0 2 2 0 8 0
mcl16k 16384 11 0 0 2 0 2 2 0 8 0
mcl12k 12288 10 0 0 1 0 1 1 0 8 0
mcl9k 9216 7 0 0 1 0 1 1 0 8 0
mcl8k 8192 18 0 0 3 1 2 3 0 8 0
mcl4k 4096 24 0 0 3 0 3 3 0 8 0
mcl2k2 2112 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 261 0 0 33 0 33 33 0 8 0
mtagpl 96 13 0 0 1 0 1 1 0 8 0
mbufpl 256 406 0 0 21 0 21 21 0 8 0
bufpl 280 7898 0 1643 448 0 448 448 0 8 0
anonpl 24 342649 0 336478 119 58 61 62 0 186 9
amapchunkpl 152 58893 0 58149 46 15 31 34 0 158 0
amappl16 200 8021 0 7900 43 26 17 20 0 8 7
amappl15 192 21 0 19 2 1 1 1 0 8 0
amappl14 184 226 0 209 2 1 1 2 0 8 0
amappl13 176 21 0 21 2 2 0 1 0 8 0
amappl12 168 3084 0 3048 4 2 2 3 0 8 0
amappl11 160 55 0 41 1 0 1 1 0 8 0
amappl10 152 65 0 52 1 0 1 1 0 8 0
amappl9 144 193 0 192 3 2 1 1 0 8 0
amappl8 136 382 0 286 4 0 4 4 0 8 0
amappl7 128 55 0 41 1 0 1 1 0 8 0
amappl6 120 513 0 491 2 1 1 2 0 8 0
amappl5 112 240 0 225 1 0 1 1 0 8 0
amappl4 104 698 0 658 3 1 2 3 0 8 0
amappl3 96 12040 0 11942 3 0 3 3 0 8 0
amappl2 88 2701 0 2619 4 2 2 4 0 8 0
amappl1 80 16950 0 16405 23 10 13 23 0 8 0
amappl 88 17974 0 17754 6 0 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 86 0 12 2 0 2 2 0 8 0
uaddrrnd 24 2185 0 2146 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2185 0 2146 1 0 1 1 0 8 0
vmmpekpl 168 18899 0 18831 4 0 4 4 0 8 0
vmmpepl 168 151949 0 149777 164 54 110 120 0 357 8
vmsppl 440 2184 0 2146 7 2 5 5 0 8 0
rwobjpl 56 46465 0 40248 96 8 88 88 0 8 0
pdppl 4096 4377 0 4300 227 150 77 83 0 8 0
pvpl 32 49150 0 0 399 2 397 397 0 265 0
pmappl 248 2184 0 2146 3 0 3 3 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 564 0 185 11 0 11 11 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp
x86_ipi_db(ffffffff82c79ff0) at x86_ipi_db+0x1e 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+0x27
__mp_lock(ffffffff82db7348) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82db7348) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x27
end of kernel
end trace frame: 0x7a9432860c30, count: 9
ddb{0}> trace
x86_ipi_db(ffffffff82c79ff0) at x86_ipi_db+0x1e 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+0x27
__mp_lock(ffffffff82db7348) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82db7348) at __mp_lock+0x122 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x27
end of kernel
end trace frame: 0x7a9432860c30, count: -6
ddb{0}> machine ddbcpu 1
Stopped at checkalias+0xa7: movl 0x18(%r13),%ebx
checkalias(fffffd80673d5b58,31700,0) at checkalias+0xa7 sys/kern/vfs_subr.c:564
cdevvp(31700,ffff80002c6b9b50) at cdevvp+0x9c getdevvp sys/kern/vfs_subr.c:533 [inline]
cdevvp(31700,ffff80002c6b9b50) at cdevvp+0x9c sys/kern/vfs_subr.c:507
spec_open_clone(ffff80002c6b9c28) at spec_open_clone+0x18f sys/kern/spec_vnops.c:711
spec_open(ffff80002c6b9c28) at spec_open+0x242 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806f0e46f0,1,fffffd807f7d76e8,ffff8000373a6550) at VOP_OPEN+0x76 sys/kern/vfs_vops.c:138
vn_open(ffff80002c6b9e78,1,0) at vn_open+0x4e4 sys/kern/vfs_vnops.c:177
doopenat(ffff8000373a6550,ffffff9c,20000040,0,0,ffff80002c6ba020) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff80002c6ba0d0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002c6ba0d0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5191a50e3b0, count: 6
ddb{1}> trace
checkalias(fffffd80673d5b58,31700,0) at checkalias+0xa7 sys/kern/vfs_subr.c:564
cdevvp(31700,ffff80002c6b9b50) at cdevvp+0x9c getdevvp sys/kern/vfs_subr.c:533 [inline]
cdevvp(31700,ffff80002c6b9b50) at cdevvp+0x9c sys/kern/vfs_subr.c:507
spec_open_clone(ffff80002c6b9c28) at spec_open_clone+0x18f sys/kern/spec_vnops.c:711
spec_open(ffff80002c6b9c28) at spec_open+0x242 sys/kern/spec_vnops.c:148
VOP_OPEN(fffffd806f0e46f0,1,fffffd807f7d76e8,ffff8000373a6550) at VOP_OPEN+0x76 sys/kern/vfs_vops.c:138
vn_open(ffff80002c6b9e78,1,0) at vn_open+0x4e4 sys/kern/vfs_vnops.c:177
doopenat(ffff8000373a6550,ffffff9c,20000040,0,0,ffff80002c6ba020) at doopenat+0x269 sys/kern/vfs_syscalls.c:1126
syscall(ffff80002c6ba0d0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff80002c6ba0d0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5191a50e3b0, count: -9