witness: lock order reversal:
1st 0xffff8000016024f0 sbufsnd (&so->so_snd.sb_lock)
2nd 0xfffffd806e72c8f0 inode (&ip->i_lock)
lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock)
lock order data 0xffffffff834a8bf6 -> 0xffffffff8342285f is missing
lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock)
#0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
#1 sblock+0xb6 sys/kern/uipc_socket2.c:536
#2 soreceive+0x27d sys/kern/uipc_socket.c:890
#3 fifo_read+0x117 sys/miscfs/fifofs/fifo_vnops.c:264
#4 VOP_READ+0x101 sys/kern/vfs_vops.c:227
#5 vn_rdwr+0x15b sys/kern/vfs_vnops.c:-1
#6 vndsetcred+0xa1 sys/dev/vnd.c:685
#7 vndioctl+0xdfc sys/dev/vnd.c:486
#8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531
#10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#12 Xsyscall+0x128
lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock)
#0 rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
#1 sblock+0xb6 sys/kern/uipc_socket2.c:536
#2 sosplice+0x312 sys/kern/uipc_socket.c:1347
#3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1226
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#5 Xsyscall+0x128
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806e72c8f0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e72c8d8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806e72c8d8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806583a6d8,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd806583a6d8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80003c420d90) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
namei(ffff80003c420d90) at namei+0x7ca sys/kern/vfs_lookup.c:250
unp_connect(ffff800001602308,fffffd8066069b00,ffff80003c418a88) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff800001602308,fffffd80680b8800,fffffd8066069b00,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609
sosend(ffff800001602308,fffffd8066069b00,ffff80003c421018,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff80003c418a88,5,ffff80003c421198,e,ffff80003c421250) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785
sys_sendmsg(ffff80003c418a88,ffff80003c421300,ffff80003c421250) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
syscall(ffff80003c421300) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c421300) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe7c2e56950, count: -15
ddb{1}> show registers
rdi 0
rsi 0x80000 acpi_pdirpa+0x6be71
rbp 0xffff80003c420a00
rbx 0
rdx 0xffff8000015f6100
rcx 0xffff80003c418a88
rax 0x7ffff acpi_pdirpa+0x6be70
r8 0xffff80003c4208e0
r9 0x8080808080808080
r10 0xb0c66704f7da58ce
r11 0xff10da08ba47388d
r12 0xfffffd80040458c0
r13 0xfffffd800482d350
r14 0x3
r15 0xffffffff834ba9b1 substchar+0xee4e
rip 0xffffffff82e4f2c5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c4209f0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=507067 pid=35675 tcnt=3 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=86, usrpri=86, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003c419a18,0xffffffff839c4ed8
process=0xffff80002a38f038 user=0xffff80003c41c000, vmspace=0xfffffd806c8d8200
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
76383 386672 55068 0 7 0 syz-executor
76383 496789 55068 0 3 0x4000080 kqsel syz-executor
60195 452990 89914 0 2 0 syz-executor
60195 281485 89914 0 3 0x4000080 fsleep syz-executor
35675 22086 4446 0 2 0 syz-executor
35675 33844 4446 0 3 0x4000080 sbwait syz-executor
*35675 507067 4446 0 7 0x4000000 syz-executor
93781 98295 66488 0 3 0x80 nanoslp syz-executor
93781 403472 66488 0 3 0x4000000 smrbar syz-executor
95670 177365 11691 0 3 0x80 nanoslp syz-executor
95670 176439 11691 0 3 0x4000080 ttyout syz-executor
95670 142339 11691 0 3 0x4000080 fsleep syz-executor
95670 463786 11691 0 3 0x4000080 fsleep syz-executor
89914 512577 18948 0 3 0x82 nanoslp syz-executor
10155 223384 22153 0 3 0x100082 sbwait arp
22153 138941 31952 0 3 0x10008a sigsusp sh
47587 364900 18948 0 3 0x82 wait syz-executor
66488 81731 18948 0 3 0x82 nanoslp syz-executor
4446 486688 18948 0 3 0x82 nanoslp syz-executor
55068 212620 18948 0 3 0x82 nanoslp syz-executor
11691 450828 18948 0 3 0x82 nanoslp syz-executor
15816 246862 18948 0 3 0x82 nanoslp syz-executor
31952 156995 18948 0 3 0x82 wait syz-executor
18948 260979 18213 0 3 0x82 kqread syz-executor
18213 213398 31498 0 3 0x10008a sigsusp ksh
31498 436854 58851 0 3 0x98 kqread sshd-session
58851 326439 71010 0 3 0x92 kqread sshd-session
63491 149055 1 0 3 0x100083 ttyopn getty
71010 11195 1 0 3 0x88 kqread sshd
19687 4392 40066 74 3 0x1100092 bpf pflogd
40066 260421 1 0 3 0x80 sbwait pflogd
25418 193463 64554 73 3 0x1100010 biowait syslogd
64554 373807 1 0 3 0x100082 sbwait syslogd
63924 16189 1 0 3 0x100080 kqread resolvd
27525 323170 96933 77 3 0x100092 kqread dhcpleased
39456 39841 96933 77 3 0x100092 kqread dhcpleased
96933 238327 1 0 3 0x80 kqread dhcpleased
33098 385546 0 0 2 0x40014200 smr
25867 142980 0 0 2 0x14200 zerothread
93612 133666 0 0 3 0x14200 aiodoned aiodoned
8723 266265 0 0 3 0x14200 syncer update
43117 209299 0 0 3 0x14200 cleaner cleaner
9392 332922 0 0 3 0x14200 reaper reaper
85189 208751 0 0 3 0x14200 pgdaemon pagedaemon
759 106514 0 0 3 0x14200 bored viomb
68588 200381 0 0 3 0x40014200 acpi0 acpi0
14039 149517 0 0 3 0x40014200 idle1
65481 42893 0 0 3 0x14200 bored softnet1
19851 160195 0 0 2 0x14200 softnet0
87362 369403 0 0 3 0x14200 smrbar systqmp
6626 338925 0 0 3 0x14200 bored systq
97428 296522 0 0 3 0x14200 tmoslp softclockmp
40603 281698 0 0 3 0x40014200 tmoslp softclock
50589 422496 0 0 3 0x40014200 idle0
1 294227 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 35675 (syz-executor) thread 0xffff80003c418a88 (507067)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83997f80)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 unp_connect+0x28c sys/kern/uipc_usrreq.c:872
#2 uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609
#3 sosend+0x804 sys/kern/uipc_socket.c:-1
#4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785
#5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#7 Xsyscall+0x128
exclusive rwlock sbufsnd r = 0 (0xffff8000016024f0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 sblock+0xb6 sys/kern/uipc_socket2.c:536
#3 sosend+0x2e9 sys/kern/uipc_socket.c:639
#4 sendit+0x5a5 sys/kern/uipc_syscalls.c:785
#5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#7 Xsyscall+0x128
Process 93781 (syz-executor) thread 0xffff80003c4182c0 (403472)
exclusive rwlock clonelk r = 0 (0xffffffff83895a28)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 if_clone_destroy+0x93 sys/net/if.c:-1
#3 ifioctl+0x59d sys/net/if.c:2159
#4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6 Xsyscall+0x128
Process 25418 (syslogd) thread 0xffff80002a233c98 (193463)
exclusive rrwlock inode r = 0 (0xfffffd806ed64100)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5 sys_fsync+0x144 sys/kern/vfs_syscalls.c:2970
#6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#7 Xsyscall+0x128
Process 87362 (systqmp) thread 0xffff8000ffffe298 (369403)
shared rwlock systqmp r = 0 (0xffffffff83867858)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 taskq_thread+0x12a sys/kern/kern_task.c:442
#2 proc_trampoline+0x10
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11077 12153K 12509K 166960K 13161 0
pcb 17 13K 14K 166960K 164 0
rtable 223 10K 10K 166960K 458 0
pf 32 17K 81K 166960K 117 0
ifaddr 40 7K 8K 166960K 91 0
ifgroup 51 2K 2K 166960K 138 0
sysctl 3 1K 9K 166960K 10 0
counters 68 36K 38K 166960K 168 0
ioctlops 0 0K 4K 166960K 1588 0
iov 0 0K 24K 166960K 30 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1411 89K 90K 166960K 2098 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 3 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 35 0
dirhash 12 2K 2K 166960K 24 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 19 69K 244K 166960K 754 0
sigio 0 0K 0K 166960K 10 0
proc 73 115K 180K 166960K 632 0
subproc 72 4K 4K 166960K 81 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 57 0
in_multi 81 5K 7K 166960K 127 0
ether_multi 1 0K 0K 166960K 4 0
mrt 1 0K 0K 166960K 20 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 103 466K 466K 166960K 103 0
exec 0 0K 1K 166960K 482 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 254 161K 187K 166960K 8686 0
UVM aobj 19 10K 10K 166960K 20 0
pinsyscall 45 90K 106K 166960K 1935 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 2 0K 1K 166960K 58 0
NDP 11 0K 1K 166960K 61 0
temp 64 9080K 9329K 166960K 26075 0
kqueue 14 22K 30K 166960K 138 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 26 0 0 1 0 1 1 0 8 0
rtpcb 120 126 0 121 3 0 3 3 0 8 2
rtentry 176 137 0 47 5 0 5 5 0 8 0
unpcb 144 502 0 481 4 3 1 4 0 8 0
syncache 336 7 0 7 1 1 0 1 0 8 0
tcpcb 736 158 0 153 3 1 2 2 0 8 1
arp 136 23 0 5 1 0 1 1 0 8 0
inpcb 328 606 0 595 5 0 5 5 0 8 3
nd6 152 27 0 7 1 0 1 1 0 8 0
pkpcb 40 5 0 5 2 1 1 1 0 8 1
kcovpl 48 9 0 1 1 0 1 1 0 8 0
ppxss 1192 42 0 42 1 0 1 1 0 8 1
pppxif 1504 2 0 2 2 1 1 1 0 8 1
pffrag 232 7 0 1 1 0 1 1 0 482 0
pffrnode 88 7 0 1 1 0 1 1 0 8 0
pffrent 40 9 0 3 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 53 0 9 1 0 1 1 0 8 0
pfstkey 128 53 0 9 2 0 2 2 0 8 0
pfstate 448 53 0 9 6 0 6 6 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
rttmr 136 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 579 0 168 28 1 27 28 0 8 0
art_table 40 580 0 168 5 0 5 5 0 8 0
art_node 32 136 0 49 1 0 1 1 0 8 0
sysvmsgpl 40 23 0 20 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 32 0 22 1 0 1 1 0 8 0
shmpl 112 13 0 1 1 0 1 1 0 8 0
dirhash 1024 25 0 8 3 0 3 3 0 8 0
dino2pl 256 2837 0 1379 93 0 93 93 0 8 0
ffsino 296 2837 0 1379 114 0 114 114 0 8 0
nchpl 144 3807 0 2103 64 0 64 64 0 8 0
rtmask 32 12 0 12 2 1 1 1 0 8 1
vnodes 216 3352 0 0 187 0 187 187 0 8 0
namei 1024 12435 0 12434 2 1 1 2 0 8 0
percpumem 16 99 0 50 1 0 1 1 0 8 0
vcpupl 3968 4 0 0 1 0 1 1 0 8 0
vmpool 848 4 0 0 1 0 1 1 0 8 0
kstatmem 264 90 0 66 3 0 3 3 0 8 1
scsiplug 72 3 0 3 2 1 1 1 0 8 1
scxspl 216 19656 0 19655 5 4 1 4 1 8 0
plimitpl 152 120 0 102 1 0 1 1 0 8 0
sigapl 424 1061 0 1012 7 1 6 7 0 8 0
knotepl 120 549 0 0 17 0 17 17 0 8 0
kqueuepl 224 263 0 250 5 0 5 5 0 8 4
pipepl 344 165 0 138 3 0 3 3 0 8 0
fdescpl 528 1043 0 1010 3 0 3 3 0 8 0
filepl 160 5772 0 5544 17 1 16 16 0 8 3
lockfpl 104 242 0 239 1 0 1 1 0 8 0
lockfspl 48 105 0 102 1 0 1 1 0 8 0
sessionpl 144 27 0 18 1 0 1 1 0 8 0
pgrppl 48 42 0 25 1 0 1 1 0 8 0
ucredpl 104 834 0 821 1 0 1 1 0 8 0
zombiepl 144 1014 0 1012 1 0 1 1 0 8 0
processpl 1232 1061 0 1012 5 0 5 5 0 8 0
procpl 664 2135 0 2078 6 0 6 6 0 8 0
sosppl 176 1 0 1 1 0 1 1 0 8 1
sockpl 752 1251 0 1214 15 4 11 11 0 8 6
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 122 0 0 16 0 16 16 0 8 0
mcl2k 2048 37 0 0 4 0 4 4 0 8 0
mtagpl 96 5 0 0 1 0 1 1 0 8 0
mbufpl 256 2490 0 0 156 0 156 156 0 8 0
bufpl 280 7260 0 1131 438 0 438 438 0 8 0
anonpl 32 8542 0 0 69 0 69 69 0 246 0
amapchunkpl 152 28108 0 27583 31 3 28 29 0 158 7
amappl16 200 3546 0 3515 27 13 14 17 0 8 8
amappl15 192 17 0 17 1 1 0 1 0 8 0
amappl14 184 437 0 435 1 0 1 1 0 8 0
amappl13 176 133 0 120 1 0 1 1 0 8 0
amappl12 168 1301 0 1268 2 0 2 2 0 8 0
amappl11 160 4 0 4 1 1 0 1 0 8 0
amappl10 152 64 0 50 1 0 1 1 0 8 0
amappl9 144 273 0 273 1 1 0 1 0 8 0
amappl8 136 104 0 101 1 0 1 1 0 8 0
amappl7 128 153 0 139 1 0 1 1 0 8 0
amappl6 120 164 0 162 1 0 1 1 0 8 0
amappl5 112 102 0 92 1 0 1 1 0 8 0
amappl4 104 320 0 299 1 0 1 1 0 8 0
amappl3 96 5504 0 5379 4 0 4 4 0 8 0
amappl2 88 588 0 523 2 0 2 2 0 8 0
amappl1 80 13731 0 13096 17 0 17 17 0 8 1
amappl 88 7814 0 7638 5 0 5 5 0 92 0
uvmvnodes 80 123 0 0 3 0 3 3 0 8 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
dma512 512 2 0 2 1 1 0 1 0 8 0
dma256 256 7 0 7 2 2 0 1 0 8 0
dma128 128 254 0 254 2 2 0 1 0 8 0
dma64 64 7 0 7 2 2 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 19 0 18 1 0 1 1 0 8 0
aobjpl 72 19 0 1 1 0 1 1 0 8 0
uaddrrnd 24 1043 0 1010 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1043 0 1010 1 0 1 1 0 8 0
vmmpekpl 168 10642 0 10602 3 0 3 3 0 8 0
vmmpepl 168 75344 0 73311 106 5 101 105 0 357 0
vmsppl 488 1042 0 1010 5 0 5 5 0 8 0
rwobjpl 80 23445 0 22304 31 1 30 30 0 8 0
pdppl 4096 2101 0 2024 104 25 79 85 0 8 2
pvpl 32 18075 0 0 146 0 146 146 0 265 0
pmappl 256 1046 0 1010 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 430 0 34 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff8392cff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
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(ffffffff83997780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83997780) at __mp_lock+0x192 sys/kern/kern_lock.c:173
intr_handler(ffff80003c3fdd90,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__mp_lock(ffffffff83997780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83997780) at __mp_lock+0x192 sys/kern/kern_lock.c:173
intr_handler(ffff80003c3fdef0,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
end of kernel
end trace frame: 0x7e259460dad0, count: -9
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806e72c8f0,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e72c8d8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806e72c8d8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd806583a6d8,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd806583a6d8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80003c420d90) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
namei(ffff80003c420d90) at namei+0x7ca sys/kern/vfs_lookup.c:250
unp_connect(ffff800001602308,fffffd8066069b00,ffff80003c418a88) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff800001602308,fffffd80680b8800,fffffd8066069b00,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609
sosend(ffff800001602308,fffffd8066069b00,ffff80003c421018,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff80003c418a88,5,ffff80003c421198,e,ffff80003c421250) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785
sys_sendmsg(ffff80003c418a88,ffff80003c421300,ffff80003c421250) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
syscall(ffff80003c421300) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c421300) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xe7c2e56950, count: -15