witness: lock order reversal:
1st 0xffff8000015fd120 sbufsnd (&so->so_snd.sb_lock)
2nd 0xfffffd806c925a28 inode (&ip->i_lock)
lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock)
lock order data 0xffffffff8341328d -> 0xffffffff83386825 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:775
#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:1227
#4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
#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(fffffd806c925a28,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806c925a10,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806c925a10,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd8069f7c1d0,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd8069f7c1d0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80003c504e50) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
namei(ffff80003c504e50) at namei+0x7ca sys/kern/vfs_lookup.c:250
unp_connect(ffff8000015fcf38,fffffd806f362800,ffff80003abf87e8) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff8000015fcf38,fffffd806d5e3100,fffffd806f362800,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609
sosend(ffff8000015fcf38,fffffd806f362800,ffff80003c5050d8,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff80003abf87e8,6,ffff80003c505258,e,ffff80003c505310) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785
sys_sendmsg(ffff80003abf87e8,ffff80003c5053c0,ffff80003c505310) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
syscall(ffff80003c5053c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5053c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5f7cfe6d0a0, count: -15
ddb{1}> show registers
rdi 0
rsi 0x80000 acpi_pdirpa+0x6be71
rbp 0xffff80003c504ac0
rbx 0
rdx 0xffff800001590b40
rcx 0xffff80003abf87e8
rax 0x7ffff acpi_pdirpa+0x6be70
r8 0xffff80003c5049a0
r9 0x8080808080808080
r10 0x190a2cbb2ec05bf5
r11 0x32235e36b856b325
r12 0xfffffd8003f548c0
r13 0xfffffd800473c350
r14 0x3
r15 0xffffffff83421d15 substchar+0x68ae
rip 0xffffffff82eec745 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c504ab0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=59393 pid=21591 tcnt=2 stat=onproc
flags process=10<SUGID> proc=4000000<THREAD>
runpri=32, usrpri=50, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003abf8a80,0xffff80003c4c6d40
process=0xffff80003c4009c8 user=0xffff80003c500000, vmspace=0xfffffd806c9697b8
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
96053 484452 33993 0 2 0 syz-executor
21591 390287 64524 60929 2 0x10 syz-executor
*21591 59393 64524 60929 7 0x4000010 syz-executor
12897 115660 6476 -1 7 0x10 syz-executor
12897 310618 6476 -1 3 0x4000090 fsleep syz-executor
12897 424105 6476 -1 2 0x4000010 syz-executor
15508 436471 94995 0 2 0 syz-executor
15508 270667 94995 0 2 0x4000000 syz-executor
73095 490377 58376 0 2 0 syz-executor
73095 397738 58376 0 3 0x4000080 fsleep syz-executor
73095 220771 58376 0 2 0x4000000 syz-executor
68159 98503 33644 0 2 0 syz-executor
68159 402348 33644 0 3 0x4000080 fsleep syz-executor
21192 267787 64064 0 2 0 syz-executor
21192 127303 64064 0 3 0x4000080 fsleep syz-executor
25239 20610 5885 0 2 0 syz-executor
25239 461188 5885 0 3 0x4000080 fsleep syz-executor
40328 75276 0 0 3 0x14200 acct acct
94995 469320 38431 0 3 0x82 nanoslp syz-executor
97252 449863 0 0 3 0x14280 nfsidl nfsio
91931 67610 0 0 3 0x14280 nfsidl nfsio
41883 134465 0 0 3 0x14280 nfsidl nfsio
85636 283321 0 0 3 0x14280 nfsidl nfsio
77955 112450 0 0 3 0x14280 nfsidl nfsio
52754 494798 0 0 3 0x14280 nfsidl nfsio
24264 178343 0 0 3 0x14280 nfsidl nfsio
95062 108850 0 0 3 0x14280 nfsidl nfsio
84584 28321 0 0 3 0x14280 nfsidl nfsio
97618 93966 0 0 3 0x14280 nfsidl nfsio
76276 158567 0 0 3 0x14280 nfsidl nfsio
54614 123391 0 0 3 0x14280 nfsidl nfsio
66636 69418 0 0 3 0x14280 nfsidl nfsio
11594 435000 0 0 3 0x14280 nfsidl nfsio
5928 431105 0 0 3 0x14280 nfsidl nfsio
15525 177701 0 0 3 0x14280 nfsidl nfsio
31749 507134 0 0 3 0x14280 nfsidl nfsio
82404 134335 0 0 3 0x14280 nfsidl nfsio
96205 262918 0 0 3 0x14280 nfsidl nfsio
10757 407022 0 0 3 0x14280 nfsidl nfsio
75839 72593 1 0 3 0x100083 ttyin getty
64524 428986 38431 0 3 0x82 nanoslp syz-executor
33644 288778 38431 0 3 0x82 nanoslp syz-executor
33993 215891 38431 0 3 0x82 nanoslp syz-executor
5885 380199 38431 0 3 0x82 nanoslp syz-executor
6476 211148 38431 0 3 0x82 nanoslp syz-executor
58376 470964 38431 0 3 0x82 nanoslp syz-executor
64064 350374 38431 0 2 0x2 syz-executor
38431 179915 81634 0 3 0x82 kqread syz-executor
81634 275688 80022 0 3 0x10008a sigsusp ksh
80022 129512 63673 0 3 0x98 kqread sshd-session
63673 318815 8431 0 3 0x92 kqread sshd-session
8431 325111 1 0 3 0x88 kqread sshd
11156 7403 12803 74 3 0x1100092 bpf pflogd
12803 353882 1 0 3 0x80 sbwait pflogd
64207 461622 67328 73 3 0x1100090 kqread syslogd
67328 200037 1 0 3 0x100082 sbwait syslogd
83361 194837 1 0 3 0x100080 kqread resolvd
97080 450803 9245 77 3 0x100092 kqread dhcpleased
45418 461525 9245 77 3 0x100092 kqread dhcpleased
9245 38087 1 0 3 0x80 kqread dhcpleased
14372 27096 0 0 3 0x14200 bored smr
54446 127781 0 0 2 0x14200 zerothread
20787 15532 0 0 3 0x14200 aiodoned aiodoned
89628 313734 0 0 3 0x14200 syncer update
40016 436461 0 0 3 0x14200 cleaner cleaner
6621 480522 0 0 3 0x14200 reaper reaper
55279 264998 0 0 3 0x14200 pgdaemon pagedaemon
29940 72366 0 0 3 0x14200 bored viomb
35826 281117 0 0 3 0x40014200 acpi0 acpi0
14114 295162 0 0 3 0x40014200 idle1
41108 87551 0 0 3 0x14200 bored softnet1
2796 454753 0 0 2 0x14200 softnet0
18279 497185 0 0 3 0x14200 bored systqmp
43189 417829 0 0 3 0x14200 bored systq
65 140128 0 0 3 0x14200 tmoslp softclockmp
33680 442268 0 0 3 0x40014200 tmoslp softclock
55302 274566 0 0 3 0x40014200 idle0
1 31622 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 21591 (syz-executor) thread 0xffff80003abf87e8 (59393)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838d2580)
#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:775
#7 Xsyscall+0x128
exclusive rwlock sbufsnd r = 0 (0xffff8000015fd120)
#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:775
#7 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11068 12191K 12366K 166960K 12792 0
pcb 17 12K 12K 166960K 133 0
rtable 237 12K 12K 166960K 488 0
pf 41 19K 21K 166960K 111 0
ifaddr 40 7K 8K 166960K 82 0
ifgroup 55 2K 2K 166960K 128 0
sysctl 4 1K 9K 166960K 16 0
counters 70 37K 38K 166960K 156 0
ioctlops 0 0K 4K 166960K 1572 0
iov 0 0K 24K 166960K 95 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1426 90K 90K 166960K 2008 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 1K 166960K 26 0
dirhash 12 2K 3K 166960K 30 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 89K 166960K 680 0
sigio 1 0K 0K 166960K 7 0
proc 72 115K 164K 166960K 606 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 2 0K 0K 166960K 71 0
in_multi 86 6K 7K 166960K 132 0
ether_multi 1 0K 0K 166960K 6 0
mrt 1 0K 0K 166960K 13 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 443 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 236 167K 182K 166960K 8099 0
UVM aobj 13 8K 8K 166960K 13 0
pinsyscall 43 86K 102K 166960K 1864 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 57 0
NDP 12 0K 1K 166960K 53 0
temp 50 8681K 8752K 166960K 42508 0
kqueue 13 20K 31K 166960K 141 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 60 0 57 1 0 1 1 0 8 0
rtentry 176 140 0 46 6 0 6 6 0 8 0
unpcb 144 467 0 444 9 5 4 6 0 8 3
syncache 336 9 0 9 2 1 1 1 0 8 1
tcpcb 736 207 0 203 7 0 7 7 0 8 6
arp 136 22 0 3 1 0 1 1 0 8 0
inpcb 328 599 0 590 8 1 7 7 0 8 5
nd6 152 30 0 6 2 0 2 2 0 8 0
pkpcb 40 6 0 6 2 1 1 1 0 8 1
kcovpl 48 9 0 1 1 0 1 1 0 8 0
mppekey 1024 2 0 2 2 1 1 1 0 8 1
ppxss 1192 32 0 32 2 1 1 1 0 8 1
pppxif 1504 6 0 6 2 1 1 1 0 8 1
pfstscr 40 2 0 2 1 1 0 1 0 8 0
pffrag 232 6 0 2 1 0 1 1 0 482 0
pffrnode 88 4 0 0 1 0 1 1 0 8 0
pffrent 40 13 0 9 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 7 0 3 2 1 1 1 0 8 0
pfanchor 1288 1 0 0 1 0 1 1 0 8 0
pftag 88 2 0 0 1 0 1 1 0 8 0
pfstitem 24 4 0 0 1 0 1 1 0 8 0
pfstkey 128 10 0 6 2 1 1 1 0 8 0
pfstate 448 5 0 3 2 1 1 1 0 8 0
pfrule 1360 3 0 2 1 0 1 1 0 8 0
rttmr 136 2 0 2 2 1 1 1 0 8 1
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 624 0 237 30 3 27 30 0 8 2
art_table 40 626 0 237 5 0 5 5 0 8 0
art_node 32 140 0 55 1 0 1 1 0 8 0
sysvmsgpl 40 8 0 7 2 1 1 1 0 8 0
semapl 112 20 0 10 1 0 1 1 0 8 0
shmpl 112 8 0 0 1 0 1 1 0 8 0
dirhash 1024 29 0 12 3 0 3 3 0 8 0
dino2pl 256 2664 0 1155 96 0 96 96 0 8 0
ffsino 296 2664 0 1155 118 0 118 118 0 8 1
nchpl 144 3584 0 1885 64 0 64 64 0 8 0
rtmask 32 13 0 13 1 1 0 1 0 8 0
vnodes 216 3128 0 0 174 0 174 174 0 8 0
namei 1024 12195 0 12194 2 1 1 1 0 8 0
percpumem 16 93 0 43 1 0 1 1 0 8 0
vcpupl 3968 2 0 0 1 0 1 1 0 8 0
vmpool 848 2 0 0 1 0 1 1 0 8 0
pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0
kstatmem 264 70 0 44 3 1 2 3 0 8 0
scsiplug 72 3 0 3 1 1 0 1 0 8 0
scxspl 216 20119 0 20119 16 8 8 8 1 8 8
plimitpl 152 114 0 97 1 0 1 1 0 8 0
sigapl 424 1016 0 947 9 1 8 8 0 8 0
knotepl 120 513 0 0 16 0 16 16 0 8 0
kqueuepl 224 256 0 247 5 0 5 5 0 8 4
pipepl 344 159 0 131 3 0 3 3 0 8 0
fdescpl 528 977 0 945 3 0 3 3 0 8 0
filepl 160 5614 0 5393 24 8 16 18 0 8 6
lockfpl 104 378 0 375 2 1 1 2 0 8 0
lockfspl 48 176 0 173 1 0 1 1 0 8 0
sessionpl 144 30 0 21 1 0 1 1 0 8 0
pgrppl 48 45 0 28 1 0 1 1 0 8 0
ucredpl 104 946 0 930 1 0 1 1 0 8 0
zombiepl 144 947 0 947 1 0 1 1 0 8 1
processpl 1232 1016 0 947 6 0 6 6 0 8 0
procpl 664 1916 0 1838 8 0 8 8 0 8 0
sosppl 176 3 0 3 2 1 1 1 0 8 1
sockpl 752 1155 0 1120 30 18 12 17 0 8 8
mcl64k 65536 6 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
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 114 0 0 15 0 15 15 0 8 0
mcl2k 2048 23 0 0 3 0 3 3 0 8 0
mtagpl 96 7 0 0 1 0 1 1 0 8 0
mbufpl 256 204 0 0 13 0 13 13 0 8 0
bufpl 280 8702 0 2566 439 0 439 439 0 8 0
anonpl 32 10802 0 0 88 0 88 88 0 246 0
amapchunkpl 152 25967 0 25484 36 8 28 30 0 158 7
amappl16 200 4163 0 4127 35 20 15 23 0 8 7
amappl15 192 8 0 7 1 0 1 1 0 8 0
amappl14 184 10 0 10 1 1 0 1 0 8 0
amappl13 176 440 0 439 1 0 1 1 0 8 0
amappl12 168 1362 0 1320 3 1 2 3 0 8 0
amappl11 160 4 0 3 1 0 1 1 0 8 0
amappl10 152 65 0 51 1 0 1 1 0 8 0
amappl9 144 243 0 243 1 1 0 1 0 8 0
amappl8 136 32 0 29 1 0 1 1 0 8 0
amappl7 128 87 0 86 1 0 1 1 0 8 0
amappl6 120 300 0 287 1 0 1 1 0 8 0
amappl5 112 107 0 97 1 0 1 1 0 8 0
amappl4 104 495 0 465 1 0 1 1 0 8 0
amappl3 96 4408 0 4324 4 1 3 3 0 8 0
amappl2 88 1148 0 1071 2 0 2 2 0 8 0
amappl1 80 13232 0 12632 15 1 14 15 0 8 0
amappl 88 7218 0 7061 5 0 5 5 0 92 0
uvmvnodes 80 116 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
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 254 0 254 2 2 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 12 0 0 1 0 1 1 0 8 0
uaddrrnd 24 977 0 945 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 977 0 945 1 0 1 1 0 8 0
vmmpekpl 168 10000 0 9959 3 0 3 3 0 8 0
vmmpepl 168 71718 0 69758 110 12 98 105 0 357 6
vmsppl 488 976 0 945 5 0 5 5 0 8 0
rwobjpl 80 22966 0 21916 30 1 29 30 0 8 0
pdppl 4096 1966 0 1892 104 30 74 84 0 8 0
pvpl 32 19180 0 0 155 0 155 155 0 265 0
pmappl 256 978 0 945 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 291 0 39 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff83863ff0) 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(ffffffff838d1d80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff838d1d80) at __mp_lock+0x192 sys/kern/kern_lock.c:173
intr_handler(ffff80003c3ff7b0,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153
__mp_lock(ffffffff838d1d80) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff838d1d80) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
end of kernel
end trace frame: 0x760ae1ad2e00, count: -11
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(fffffd806c925a28,9,0) at witness_checkorder+0x10d1 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806c925a10,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806c925a10,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd8069f7c1d0,2001) at VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
vn_lock(fffffd8069f7c1d0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80003c504e50) at vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
namei(ffff80003c504e50) at namei+0x7ca sys/kern/vfs_lookup.c:250
unp_connect(ffff8000015fcf38,fffffd806f362800,ffff80003abf87e8) at unp_connect+0x29d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff8000015fcf38,fffffd806d5e3100,fffffd806f362800,0) at uipc_dgram_send+0x163 sys/kern/uipc_usrreq.c:609
sosend(ffff8000015fcf38,fffffd806f362800,ffff80003c5050d8,0,0,e) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff80003abf87e8,6,ffff80003c505258,e,ffff80003c505310) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785
sys_sendmsg(ffff80003abf87e8,ffff80003c5053c0,ffff80003c505310) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:603
syscall(ffff80003c5053c0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5053c0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x5f7cfe6d0a0, count: -15