login: witness: lock order reversal:
1st 0xffff800010fd4650 sbufrcv (&so->so_rcv.sb_lock)
2nd 0xfffffd806965e848 inode (&ip->i_lock)
lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock)
lock order data 0xffffffff834385bd -> 0xffffffff833a5512 is missing
lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock)
#0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
#1 sblock+0xb7 sys/kern/uipc_socket2.c:536
#2 soreceive+0x28e sys/kern/uipc_socket.c:882
#3 fifo_read+0x11a sys/miscfs/fifofs/fifo_vnops.c:264
#4 VOP_READ+0x102 sys/kern/vfs_vops.c:227
#5 vn_rdwr+0x15b
#6 vndsetcred+0xa1 sys/dev/vnd.c:684
#7 vndioctl+0xe6c sys/dev/vnd.c:485
#8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531
#10 sys_ioctl+0x5c3
#11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#12 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(fffffd806965e848,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806965e830,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806965e830,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd8068e917e8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8068e917e8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd8068e917e8,fffffd8068e91998,0,0,200,0,5dd0a01baebed554) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8068e917e8,fffffd8068e91998,ffff80002a392020) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806cbbeb00,ec,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff800010fd4570,ffff80003c595508,ffff80003c5954b8,0,ffff80003c5954f8,ffff80003c59567c,6724f5d63645bebe) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff80002a392020,5,ffff80003c595650,0,ffff80003c595700) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff80002a392020,ffff80003c5957b0,ffff80003c595700) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80003c5957b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5957b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf66633a19f0, count: -14
ddb{1}> show registers
rdi 0
rsi 0x80000 acpi_pdirpa+0x6be71
rbp 0xffff80003c594f90
rbx 0xfffffd800470d1b8
rdx 0xffff800001436d40
rcx 0xffff80002a392020
rax 0x7ffff acpi_pdirpa+0x6be70
r8 0xffff80003c594e70
r9 0x8080808080808080
r10 0x5f78ba1f1607dd03
r11 0xa74083dd550ef273
r12 0
r13 0xfffffd8003f24f00
r14 0x3
r15 0xffffffff
rip 0xffffffff810240e5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80003c594f80
ss 0
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=179280 pid=25158 tcnt=4 stat=onproc
flags process=1000000<CHROOT> proc=4000000<THREAD>
runpri=24, usrpri=83, slppri=24, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a3934a0,0xffff80002a392d00
process=0xffff80003c54dbb8 user=0xffff80003c590000, vmspace=0xfffffd805f9b5910
estcpu=33, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
44377 151463 99334 0 2 0 syz-executor
44377 463023 99334 0 3 0x4000080 fsleep syz-executor
10761 253286 16192 0 2 0 syz-executor
10761 262738 16192 0 3 0x4000080 fsleep syz-executor
10761 372452 16192 0 2 0x4000000 syz-executor
37406 279452 11773 0 2 0 syz-executor
37406 70336 11773 0 3 0x4000080 fsleep syz-executor
32395 489685 30079 0 2 0 syz-executor
32395 25146 30079 0 7 0x4000000 syz-executor
25733 399411 20271 0 2 0 syz-executor
25733 215079 20271 0 3 0x4000080 ttyout syz-executor
25158 367321 48280 0 2 0x1000000 syz-executor
*25158 179280 48280 0 7 0x5000000 syz-executor
25158 513051 48280 0 3 0x5000080 sbwait syz-executor
25158 311692 48280 0 3 0x5000080 fsleep syz-executor
52470 275089 45423 0 3 0x80 nanoslp syz-executor
52470 522196 45423 0 3 0x4000080 kqsel syz-executor
52470 186725 45423 0 3 0x4000080 fsleep syz-executor
16557 444267 1 0 3 0x100083 ttyin getty
56569 365592 96452 0 3 0x82 sbwait sshd-session
73571 49888 0 0 3 0x14200 bored sosplice
15964 34098 0 0 3 0x14280 nfsidl nfsio
10581 252466 0 0 3 0x14280 nfsidl nfsio
35502 385350 0 0 3 0x14280 nfsidl nfsio
61686 80346 0 0 3 0x14280 nfsidl nfsio
87742 109075 0 0 3 0x14280 nfsidl nfsio
87587 205062 0 0 3 0x14280 nfsidl nfsio
84080 479130 0 0 3 0x14280 nfsidl nfsio
14238 65798 0 0 3 0x14280 nfsidl nfsio
28478 247277 0 0 3 0x14280 nfsidl nfsio
67190 346775 0 0 3 0x14280 nfsidl nfsio
50887 200096 0 0 3 0x14280 nfsidl nfsio
1848 90490 0 0 3 0x14280 nfsidl nfsio
93235 273391 0 0 3 0x14280 nfsidl nfsio
31454 373662 0 0 3 0x14280 nfsidl nfsio
16134 470014 0 0 3 0x14280 nfsidl nfsio
53166 463358 0 0 3 0x14280 nfsidl nfsio
5365 398496 0 0 3 0x14280 nfsidl nfsio
8633 258564 0 0 3 0x14280 nfsidl nfsio
43436 184349 0 0 3 0x14280 nfsidl nfsio
104 346501 0 0 3 0x14280 nfsidl nfsio
30079 55643 17783 0 3 0x82 nanoslp syz-executor
61434 226588 17783 0 3 0x82 wait syz-executor
20271 492113 17783 0 3 0x82 nanoslp syz-executor
99334 104698 17783 0 3 0x82 nanoslp syz-executor
48280 356133 17783 0 3 0x82 nanoslp syz-executor
45423 519766 17783 0 3 0x82 nanoslp syz-executor
16192 80427 17783 0 3 0x82 nanoslp syz-executor
11773 249776 17783 0 3 0x82 nanoslp syz-executor
17783 186365 73933 0 3 0x82 kqread syz-executor
73933 306422 55985 0 3 0x10008a sigsusp ksh
55985 360904 1768 0 3 0x98 kqread sshd-session
1768 470521 96452 0 3 0x92 kqread sshd-session
96452 172914 1 0 3 0x88 kqread sshd
81564 377416 82936 74 3 0x1100092 bpf pflogd
82936 32405 1 0 3 0x80 sbwait pflogd
64806 169278 43434 73 3 0x1100090 kqread syslogd
43434 44703 1 0 3 0x100082 sbwait syslogd
35583 365776 1 0 3 0x100080 kqread resolvd
50669 362154 17542 77 3 0x100092 kqread dhcpleased
7410 68104 17542 77 3 0x100092 kqread dhcpleased
17542 218821 1 0 3 0x80 kqread dhcpleased
6649 305373 0 0 3 0x14200 bored smr
21821 438701 0 0 2 0x14200 zerothread
31920 318411 0 0 3 0x14200 aiodoned aiodoned
3858 327400 0 0 3 0x14200 syncer update
46413 288940 0 0 3 0x14200 cleaner cleaner
42471 139792 0 0 3 0x14200 reaper reaper
34353 34512 0 0 3 0x14200 pgdaemon pagedaemon
47005 233725 0 0 3 0x14200 bored viomb
22889 244769 0 0 3 0x40014200 acpi0 acpi0
68966 54642 0 0 3 0x40014200 idle1
54277 342399 0 0 3 0x14200 bored softnet3
55832 153353 0 0 3 0x14200 bored softnet2
80617 240882 0 0 3 0x14200 bored softnet1
54235 52704 0 0 2 0x14200 softnet0
19080 374476 0 0 3 0x14200 bored systqmp
18017 36916 0 0 3 0x14200 bored systq
52602 86165 0 0 3 0x14200 tmoslp softclockmp
95457 370327 0 0 3 0x40014200 tmoslp softclock
54450 98530 0 0 3 0x40014200 idle0
1 10000 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 25158 (syz-executor) thread 0xffff80002a392020 (179280)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83906af8)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 unp_externalize+0x14e
#2 soreceive+0xc73 sys/kern/uipc_socket.c:1021
#3 recvit+0x40a sys/kern/uipc_syscalls.c:1072
#4 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
#5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#6 Xsyscall+0x128
exclusive rwlock sbufrcv r = 0 (0xffff800010fd4650)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2 sblock+0xb7 sys/kern/uipc_socket2.c:536
#3 soreceive+0x28e sys/kern/uipc_socket.c:882
#4 recvit+0x40a sys/kern/uipc_syscalls.c:1072
#5 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
#6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#7 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10203 11095K 11475K 166960K 12395 0
pcb 18 16K 18K 166960K 405 0
rtable 232 9K 9K 166960K 517 0
pf 40 18K 25K 166960K 113 0
ifaddr 42 7K 8K 166960K 77 0
ifgroup 59 2K 2K 166960K 131 0
sysctl 3 1K 1K 166960K 3 0
counters 66 36K 37K 166960K 126 0
ioctlops 0 0K 4K 166960K 1559 0
iov 1 0K 16K 166960K 105 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1335 84K 85K 166960K 2012 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 8 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 42 0
dirhash 15 2K 2K 166960K 21 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 106K 166960K 919 0
sigio 0 0K 0K 166960K 21 0
proc 73 91K 128K 166960K 599 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 126 0
in_multi 88 6K 7K 166960K 131 0
ether_multi 1 0K 0K 166960K 7 0
mrt 2 0K 0K 166960K 4 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 91 413K 413K 166960K 91 0
exec 0 0K 1K 166960K 586 0
fusefs mount 1 32K 32K 166960K 1 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 249 74K 77K 166960K 10183 0
UVM aobj 82 3K 5K 166960K 87 0
pinsyscall 45 90K 100K 166960K 2043 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 46 0
NDP 13 0K 2K 166960K 50 0
temp 62 8643K 8714K 166960K 22240 0
kqueue 14 22K 28K 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 24 0 0 1 0 1 1 0 8 0
rtpcb 120 94 0 90 1 0 1 1 0 8 0
rtentry 112 133 0 33 4 0 4 4 0 8 0
unpcb 144 659 0 637 5 3 2 4 0 8 1
syncache 336 12 0 12 3 2 1 1 0 8 1
tcpqe 32 2 0 2 2 1 1 1 0 8 1
tcpcb 808 298 0 289 12 4 8 8 0 8 7
arp 120 21 0 3 1 0 1 1 0 8 0
inpcb 376 1480 0 1464 33 25 8 22 0 8 6
nd6 136 29 0 5 1 0 1 1 0 8 0
pkpcb 40 5 0 5 3 3 0 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1168 20 0 20 2 1 1 1 0 8 1
pppxif 1472 3 0 3 1 0 1 1 0 8 1
pffrag 232 1 0 0 1 0 1 1 0 482 0
pffrnode 88 1 0 0 1 0 1 1 0 8 0
pffrent 40 3 0 2 1 0 1 1 0 8 0
pfosfp 40 1428 0 1428 5 5 0 5 0 8 0
pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0
pfrktable 1344 1 0 0 1 0 1 1 0 8 0
pftag 88 1 0 0 1 0 1 1 0 8 0
pfstitem 24 63 0 18 1 0 1 1 0 8 0
pfstkey 128 63 0 18 2 0 2 2 0 8 0
pfstate 376 63 0 18 5 0 5 5 0 8 0
pfrule 1344 28 0 21 2 1 1 2 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 572 0 165 31 3 28 31 0 8 0
art_table 32 575 0 165 4 0 4 4 0 8 0
art_node 16 131 0 42 1 0 1 1 0 8 0
sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 39 0 29 1 0 1 1 0 8 0
shmpl 112 84 0 5 3 0 3 3 0 8 0
dirhash 1024 23 0 4 3 0 3 3 0 8 0
dino2pl 256 3063 0 1560 95 0 95 95 0 8 0
ffsino 280 3063 0 1560 109 0 109 109 0 8 0
nchpl 144 4385 0 2693 63 0 63 63 0 8 0
rtmask 32 6 0 6 2 2 0 1 0 8 0
uvmvnodes 80 3490 0 0 72 0 72 72 0 8 0
vnodes 216 3490 0 0 194 0 194 194 0 8 0
namei 1024 14581 0 14581 2 0 2 2 0 8 2
percpumem 16 77 0 30 1 0 1 1 0 8 0
kstatmem 264 66 0 40 4 1 3 3 0 8 1
scsiplug 72 1 0 1 1 0 1 1 0 8 1
scxspl 216 13003 0 13003 12 9 3 8 1 8 3
plimitpl 152 166 0 147 1 0 1 1 0 8 0
sigapl 424 1244 0 1172 9 0 9 9 0 8 0
futexpl 64 12435 0 12430 1 0 1 1 0 8 0
knotepl 120 318 0 0 10 0 10 10 0 8 0
kqueuepl 216 383 0 373 6 5 1 4 0 8 0
pipepl 328 245 0 217 3 0 3 3 0 8 0
fdescpl 504 1203 0 1170 5 0 5 5 0 8 0
filepl 152 8012 0 7780 27 12 15 19 0 8 5
lockfpl 104 387 0 384 1 0 1 1 0 8 0
lockfspl 48 117 0 114 1 0 1 1 0 8 0
sessionpl 144 33 0 23 1 0 1 1 0 8 0
pgrppl 48 48 0 30 1 0 1 1 0 8 0
ucredpl 104 1194 0 1181 1 0 1 1 0 8 0
zombiepl 144 1308 0 1307 2 1 1 1 0 8 0
processpl 1176 1244 0 1172 6 0 6 6 0 8 0
procpl 656 2574 0 2491 8 0 8 8 0 8 0
srpgc 96 4 0 4 1 1 0 1 0 8 0
sockpl 688 2256 0 2215 34 24 10 22 0 8 6
mcl64k 65536 6 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl8k 8192 6 0 0 1 0 1 1 0 8 0
mcl4k 4096 110 0 0 14 0 14 14 0 8 0
mcl2k 2048 25 0 0 4 0 4 4 0 8 0
mtagpl 96 101 0 0 3 0 3 3 0 8 0
mbufpl 256 317 0 0 19 0 19 19 0 8 0
bufpl 280 3832 0 136 264 0 264 264 0 8 0
anonpl 24 187222 0 182578 58 27 31 49 0 184 0
amapchunkpl 152 32544 0 31953 29 4 25 25 0 158 0
amappl16 200 3970 0 3929 36 29 7 16 0 8 4
amappl15 192 3 0 3 1 1 0 1 0 8 0
amappl14 184 137 0 124 1 0 1 1 0 8 0
amappl13 176 2 0 2 1 1 0 1 0 8 0
amappl12 168 1855 0 1822 3 1 2 2 0 8 0
amappl11 160 53 0 39 1 0 1 1 0 8 0
amappl10 152 5 0 5 2 2 0 1 0 8 0
amappl9 144 263 0 263 1 1 0 1 0 8 0
amappl8 136 33 0 30 1 0 1 1 0 8 0
amappl7 128 118 0 104 1 0 1 1 0 8 0
amappl6 120 189 0 184 1 0 1 1 0 8 0
amappl5 112 129 0 119 1 0 1 1 0 8 0
amappl4 104 348 0 327 1 0 1 1 0 8 0
amappl3 96 6516 0 6392 4 0 4 4 0 8 0
amappl2 88 728 0 659 2 0 2 2 0 8 0
amappl1 80 12386 0 11720 17 1 16 16 0 8 0
amappl 88 9709 0 9521 5 0 5 5 0 92 0
dma8192 8192 1 0 1 1 1 0 1 0 8 0
dma4096 4096 3 0 3 2 1 1 1 0 8 1
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 5 2 0 2 2 0 8 0
uaddrrnd 24 1203 0 1170 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 1203 0 1170 1 0 1 1 0 8 0
vmmpekpl 168 12369 0 12334 4 1 3 3 0 8 0
vmmpepl 168 81364 0 79281 111 12 99 107 0 357 3
vmsppl 456 1202 0 1170 6 1 5 5 0 8 0
rwobjpl 64 28190 0 23549 78 3 75 75 0 8 0
pdppl 4096 2413 0 2340 113 40 73 85 0 8 0
pvpl 32 16612 0 0 134 0 134 134 0 265 0
pmappl 248 1202 0 1170 3 0 3 3 0 8 0
extentpl 40 55 0 38 1 0 1 1 0 8 0
phpool 112 314 0 53 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(ffffffff8383aff0) 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(ffffffff839068f0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839068f0) at __mp_lock+0x199 sys/kern/kern_lock.c:144
intr_handler(ffff8000358adbb0,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff839068f0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839068f0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x9f sys/dev/kcov.c:158
__mp_lock(ffffffff839068f0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839068f0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
vn_ioctl(fffffd8069130d30,8020426c,ffff8000358adf30,ffff80003c58f4b8) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514
sys_ioctl(ffff80003c58f4b8,ffff8000358ae110,ffff8000358ae060) at sys_ioctl+0x5c3
syscall(ffff8000358ae110) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000358ae110) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf766773430, count: -16
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(fffffd806965e848,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806965e830,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806965e830,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd8068e917e8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8068e917e8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd8068e917e8,fffffd8068e91998,0,0,200,0,5dd0a01baebed554) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8068e917e8,fffffd8068e91998,ffff80002a392020) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806cbbeb00,ec,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff800010fd4570,ffff80003c595508,ffff80003c5954b8,0,ffff80003c5954f8,ffff80003c59567c,6724f5d63645bebe) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff80002a392020,5,ffff80003c595650,0,ffff80003c595700) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff80002a392020,ffff80003c5957b0,ffff80003c595700) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80003c5957b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5957b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf66633a19f0, count: -14