login: witness: lock order reversal:
1st 0xffff800001546220 sbufsnd (&so->so_snd.sb_lock)
2nd 0xfffffd806e411428 inode (&ip->i_lock)
lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock)
lock order data 0xffffffff8342d33d -> 0xffffffff833d1200 is missing
lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock)
#0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:232
#1 sblock+0xb7 sys/kern/uipc_socket2.c:536
#2 soreceive+0x28e sys/kern/uipc_socket.c:881
#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 sys/kern/vfs_vnops.c:-1
#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 sys/kern/sys_generic.c:-1
#11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
#12 Xsyscall+0x128
lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock)
#0 rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:232
#1 sblock+0xb7 sys/kern/uipc_socket2.c:536
#2 sosplice+0x40d sys/kern/uipc_socket.c:1366
#3 sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1221
#4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
#5 Xsyscall+0x128
Stopped at db_enter+0x25: addq $0x8,%rsp
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806e411428,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e411410,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:232
rrw_enter(fffffd806e411410,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:605
VOP_LOCK(fffffd800b4961e0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
vn_lock(fffffd800b4961e0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80002a324578) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff80002a324578) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff800001546048,fffffd80693f3200,ffff80003c4b7750) at unp_connect+0x27d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff800001546048,fffffd800bf96300,fffffd80693f3200,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:609
sosend(ffff800001546048,fffffd80693f3200,ffff80002a3247f8,0,0,8) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff80003c4b7750,4,ffff80002a324970,8,ffff80002a324a30) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendmsg(ffff80003c4b7750,ffff80002a324ae0,ffff80002a324a30) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
syscall(ffff80002a324ae0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a324ae0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa72da34d7c0, count: -15
ddb{0}> show registers
rdi 0
rsi 0x80000 acpi_pdirpa+0x6be71
rbp 0xffff80002a3241f0
rbx 0xfffffd8004744d68
rdx 0xffff800001475fc0
rcx 0xffff80003c4b7750
rax 0x7ffff acpi_pdirpa+0x6be70
r8 0xffff80002a3240d0
r9 0x8080808080808080
r10 0x2075648860790931
r11 0xd701482a36222554
r12 0
r13 0xfffffd8003f5bf00
r14 0x3
r15 0xffffffff
rip 0xffffffff8232ace5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a3241e0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=186627 pid=7351 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=0xffff8000ffff2530,0xffff80003c4b6050
process=0xffff80003a7f9858 user=0xffff80002a31f000, vmspace=0xfffffd805cd505c8
estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
93764 79613 27559 0 7 0 syz-executor
94044 455411 46661 0 2 0 syz-executor
94044 416825 46661 0 2 0x4000080 syz-executor
7351 89691 80710 60928 2 0x10 syz-executor
* 7351 186627 80710 60928 7 0x4000010 syz-executor
930 507640 63007 0 2 0 syz-executor
930 470106 63007 0 2 0x4000000 syz-executor
50572 230382 5253 0 2 0 syz-executor
50572 24750 5253 0 3 0x4000080 sbwait syz-executor
50572 31295 5253 0 3 0x4000080 fsleep syz-executor
77255 38007 23810 60929 3 0x90 nanoslp syz-executor
77255 369037 23810 60929 3 0x4000090 kqread syz-executor
77255 393334 23810 60929 3 0x4000090 fsleep syz-executor
42056 217794 12691 0 2 0 syz-executor
42056 259632 12691 0 3 0x4000080 kqsel syz-executor
42056 282613 12691 0 3 0x4000080 fsleep syz-executor
22532 174200 86285 0 2 0 syz-executor
22532 490269 86285 0 3 0x4000080 sbwait syz-executor
22532 23149 86285 0 3 0x4000080 kqread syz-executor
22532 123280 86285 0 3 0x4000080 fsleep syz-executor
5253 363468 81983 0 3 0x82 nanoslp syz-executor
8389 195439 1 0 3 0x80 nanoslp init
12691 417495 81983 0 3 0x82 nanoslp syz-executor
23810 508271 81983 0 3 0x82 nanoslp syz-executor
43339 300330 0 0 3 0x14280 nfsidl nfsio
58030 48709 0 0 3 0x14280 nfsidl nfsio
14702 251733 0 0 3 0x14280 nfsidl nfsio
46140 304340 0 0 3 0x14280 nfsidl nfsio
82291 234708 0 0 3 0x14280 nfsidl nfsio
8063 123621 0 0 3 0x14280 nfsidl nfsio
67410 517742 0 0 3 0x14280 nfsidl nfsio
6800 282843 0 0 3 0x14280 nfsidl nfsio
66852 33507 0 0 3 0x14280 nfsidl nfsio
70421 161013 0 0 3 0x14280 nfsidl nfsio
58447 82375 0 0 3 0x14280 nfsidl nfsio
60446 18598 0 0 3 0x14280 nfsidl nfsio
88288 239804 0 0 3 0x14280 nfsidl nfsio
78498 351509 0 0 3 0x14280 nfsidl nfsio
2290 407112 0 0 3 0x14280 nfsidl nfsio
22007 210171 0 0 3 0x14280 nfsidl nfsio
98941 10848 0 0 3 0x14280 nfsidl nfsio
13671 108922 0 0 3 0x14280 nfsidl nfsio
17551 344575 0 0 3 0x14280 nfsidl nfsio
33227 237501 0 0 3 0x14280 nfsidl nfsio
90442 334803 0 0 3 0x14200 bored sosplice
46661 275306 81983 0 3 0x82 nanoslp syz-executor
86285 418991 81983 0 3 0x82 nanoslp syz-executor
27559 110672 81983 0 3 0x82 nanoslp syz-executor
80710 510808 81983 0 3 0x82 nanoslp syz-executor
63007 187042 81983 0 3 0x82 nanoslp syz-executor
81983 167844 13646 0 3 0x82 kqread syz-executor
13646 380217 24153 0 3 0x10008a sigsusp ksh
24153 243375 25452 0 3 0x98 kqread sshd-session
25452 189051 90842 0 3 0x92 kqread sshd-session
90842 420551 1 0 3 0x88 kqread sshd
89072 298583 25461 74 3 0x1100092 bpf pflogd
25461 281723 1 0 3 0x80 sbwait pflogd
21548 448571 82653 73 3 0x1100090 kqread syslogd
82653 490098 1 0 3 0x100082 sbwait syslogd
63780 372274 1 0 3 0x100080 kqread resolvd
84907 124960 2071 77 3 0x100092 kqread dhcpleased
73646 168762 2071 77 3 0x100092 kqread dhcpleased
2071 14574 1 0 3 0x80 kqread dhcpleased
35709 172780 0 0 3 0x14200 bored smr
76765 217894 0 0 2 0x14200 zerothread
2004 466801 0 0 3 0x14200 aiodoned aiodoned
27564 366644 0 0 3 0x14200 syncer update
44517 140163 0 0 3 0x14200 cleaner cleaner
378 151906 0 0 3 0x14200 reaper reaper
69205 129760 0 0 3 0x14200 pgdaemon pagedaemon
25246 412478 0 0 3 0x14200 bored viomb
12798 309047 0 0 3 0x40014200 acpi0 acpi0
4974 265673 0 0 3 0x40014200 idle1
32192 14996 0 0 3 0x14200 bored softnet3
31527 303036 0 0 3 0x14200 bored softnet2
40255 252094 0 0 3 0x14200 bored softnet1
38023 83293 0 0 3 0x14200 bored softnet0
88889 448816 0 0 3 0x14200 bored systqmp
68448 441932 0 0 3 0x14200 bored systq
83719 441227 0 0 3 0x14200 tmoslp softclockmp
4670 283628 0 0 3 0x40014200 tmoslp softclock
32901 333788 0 0 3 0x40014200 idle0
1 30906 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{0}> show all locks
Process 7351 (syz-executor) thread 0xffff80003c4b7750 (186627)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83976530)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 unp_connect+0x26c sys/kern/uipc_usrreq.c:872
#2 uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:609
#3 sosend+0x804 sys/kern/uipc_socket.c:-1
#4 sendit+0x721 sys/kern/uipc_syscalls.c:779
#5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
#6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
#7 Xsyscall+0x128
exclusive rwlock sbufsnd r = 0 (0xffff800001546220)
#0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5bb sys/kern/subr_witness.c:1160
#1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310
#2 sblock+0xb7 sys/kern/uipc_socket2.c:536
#3 sosend+0x2e2 sys/kern/uipc_socket.c:630
#4 sendit+0x721 sys/kern/uipc_syscalls.c:779
#5 sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
#6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
#7 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10229 11055K 11467K 166960K 12348 0
pcb 20 20K 22K 166960K 538 0
rtable 175 9K 11K 166960K 639 0
pf 46 19K 83K 166960K 203 0
ifaddr 38 6K 8K 166960K 137 0
ifgroup 71 3K 3K 166960K 230 0
sysctl 4 1K 9K 166960K 67 0
counters 78 38K 38K 166960K 274 0
ioctlops 0 0K 4K 166960K 1816 0
iov 0 0K 28K 166960K 181 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1443 91K 91K 166960K 2641 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 22 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 1K 166960K 210 0
dirhash 12 2K 3K 166960K 51 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 89K 166960K 1823 0
sigio 0 0K 0K 166960K 38 0
proc 63 79K 128K 166960K 857 0
subproc 72 4K 4K 166960K 101 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 369 0
in_multi 66 4K 7K 166960K 186 0
ether_multi 1 0K 0K 166960K 8 0
mrt 0 0K 0K 166960K 16 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 115 519K 519K 166960K 115 0
exec 0 0K 1K 166960K 595 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 240 158K 173K 166960K 18153 0
UVM aobj 11 2K 2K 166960K 11 0
pinsyscall 42 84K 104K 166960K 3032 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 93 0
NDP 16 0K 2K 166960K 95 0
temp 79 8696K 8768K 166960K 91073 0
kqueue 15 24K 32K 166960K 360 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 26 0 0 1 0 1 1 0 8 0
rtpcb 120 332 0 329 7 4 3 3 0 8 2
rtentry 176 200 0 131 6 0 6 6 0 8 0
unpcb 144 1438 0 1411 11 9 2 6 0 8 1
syncache 336 11 0 11 3 2 1 1 0 8 1
tcpqe 32 4 0 4 2 1 1 1 0 8 1
tcpcb 736 560 0 553 7 3 4 4 0 8 2
arp 128 27 0 19 1 0 1 1 0 8 0
inpcb 328 2169 0 2152 28 23 5 16 0 8 3
nd6 144 40 0 22 1 0 1 1 0 8 0
pkpcb 40 12 0 12 1 1 0 1 0 8 0
kcovpl 48 11 0 3 1 0 1 1 0 8 0
mppekey 1024 1 0 1 1 1 0 1 0 8 0
ppxss 1192 82 0 80 2 1 1 1 0 8 0
pppxif 1504 13 0 12 3 2 1 1 0 8 0
pfstscr 40 1 0 1 1 1 0 1 0 8 0
pffrag 232 17 0 7 1 0 1 1 0 482 0
pffrnode 88 15 0 7 1 0 1 1 0 8 0
pffrent 40 30 0 20 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
pfanchor 1288 2 0 0 1 0 1 1 0 8 0
pfstitem 24 124 0 34 1 0 1 1 0 8 0
pfstkey 128 126 0 36 3 0 3 3 0 8 0
pfstate 384 125 0 35 9 0 9 9 0 8 0
pfrule 1344 26 0 17 2 1 1 2 0 8 0
rttmr 136 3 0 3 3 3 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 887 0 564 29 3 26 29 0 8 1
art_table 32 890 0 564 4 0 4 4 0 8 0
art_node 16 188 0 127 1 0 1 1 0 8 0
sysvmsgpl 40 24 0 14 1 0 1 1 0 8 0
semapl 112 207 0 197 1 0 1 1 0 8 0
shmpl 112 8 0 0 1 0 1 1 0 8 0
dirhash 1024 43 0 26 3 0 3 3 0 8 0
dino2pl 256 4795 0 3282 95 0 95 95 0 8 0
ffsino 288 4795 0 3282 109 0 109 109 0 8 0
nchpl 144 7368 0 6814 64 39 25 64 0 8 0
rtmask 32 15 0 15 2 2 0 1 0 8 0
uvmvnodes 80 5502 0 0 113 0 113 113 0 8 0
vnodes 216 5502 0 0 306 0 306 306 0 8 0
namei 1024 24610 0 24609 3 2 1 2 0 8 0
percpumem 16 152 0 98 1 0 1 1 0 8 0
kstatmem 264 148 0 110 3 0 3 3 0 8 0
scsiplug 72 6 0 6 3 2 1 1 0 8 1
scxspl 216 35103 0 35103 14 13 1 8 1 8 1
plimitpl 152 311 0 293 1 0 1 1 0 8 0
sigapl 424 2151 0 2080 10 1 9 9 0 8 0
knotepl 120 775 0 0 23 0 23 23 0 8 0
kqueuepl 224 622 0 607 3 1 2 2 0 8 1
pipepl 336 256 0 229 3 0 3 3 0 8 0
fdescpl 520 2109 0 2077 3 0 3 3 0 8 0
filepl 160 13582 0 13343 32 13 19 20 0 8 8
lockfpl 104 981 0 978 2 1 1 2 0 8 0
lockfspl 48 270 0 267 1 0 1 1 0 8 0
sessionpl 144 36 0 28 1 0 1 1 0 8 0
pgrppl 48 225 0 209 1 0 1 1 0 8 0
ucredpl 104 1779 0 1763 1 0 1 1 0 8 0
zombiepl 144 2080 0 2080 1 0 1 1 0 8 1
processpl 1240 2151 0 2080 6 0 6 6 0 8 0
procpl 656 5008 0 4925 9 1 8 8 0 8 1
srpgc 96 19 0 19 4 3 1 1 0 8 1
sosppl 168 11 0 11 3 2 1 1 0 8 1
sockpl 728 4000 0 3953 51 37 14 25 0 8 8
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 4 0 0 1 0 1 1 0 8 0
mcl12k 12288 3 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 129 0 0 17 0 17 17 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 28 0 0 4 0 4 4 0 8 0
mtagpl 96 11 0 0 1 0 1 1 0 8 0
mbufpl 256 2243 0 0 138 0 138 138 0 8 0
bufpl 280 12284 0 6142 439 0 439 439 0 8 0
anonpl 32 17381 0 0 141 0 141 141 0 246 0
amapchunkpl 152 60896 0 60095 35 4 31 33 0 158 0
amappl16 200 7366 0 7112 79 47 32 42 0 8 0
amappl15 192 9 0 9 2 2 0 1 0 8 0
amappl14 184 158 0 147 1 0 1 1 0 8 0
amappl13 176 7 0 7 2 2 0 1 0 8 0
amappl12 168 2816 0 2786 3 1 2 2 0 8 0
amappl11 160 123 0 109 1 0 1 1 0 8 0
amappl10 152 10 0 9 2 1 1 1 0 8 0
amappl9 144 254 0 254 1 1 0 1 0 8 0
amappl8 136 22 0 19 1 0 1 1 0 8 0
amappl7 128 124 0 112 1 0 1 1 0 8 0
amappl6 120 215 0 211 1 0 1 1 0 8 0
amappl5 112 137 0 126 1 0 1 1 0 8 0
amappl4 104 355 0 337 1 0 1 1 0 8 0
amappl3 96 12541 0 12436 5 1 4 4 0 8 0
amappl2 88 764 0 701 2 0 2 2 0 8 0
amappl1 80 17049 0 16466 16 1 15 15 0 8 0
amappl 88 17044 0 16871 5 0 5 5 0 92 0
dma8192 8192 1 0 1 1 1 0 1 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 8 0 8 3 3 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 19 0 18 1 0 1 1 0 8 0
aobjpl 72 10 0 0 1 0 1 1 0 8 0
uaddrrnd 24 2109 0 2077 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 2109 0 2077 1 0 1 1 0 8 0
vmmpekpl 168 17688 0 17639 3 0 3 3 0 8 0
vmmpepl 168 139677 0 137436 131 22 109 122 0 357 1
vmsppl 480 2108 0 2077 6 1 5 5 0 8 0
rwobjpl 72 42656 0 36018 126 0 126 126 0 8 0
pdppl 4096 4225 0 4154 111 40 71 83 0 8 0
pvpl 32 25066 0 0 203 0 203 203 0 265 0
pmappl 256 2108 0 2077 3 0 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 538 0 56 14 0 14 14 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806e411428,9,0) at witness_checkorder+0x10fb sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806e411410,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:232
rrw_enter(fffffd806e411410,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:605
VOP_LOCK(fffffd800b4961e0,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527
vn_lock(fffffd800b4961e0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_lookup(ffff80002a324578) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff80002a324578) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff800001546048,fffffd80693f3200,ffff80003c4b7750) at unp_connect+0x27d sys/kern/uipc_usrreq.c:872
uipc_dgram_send(ffff800001546048,fffffd800bf96300,fffffd80693f3200,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:609
sosend(ffff800001546048,fffffd80693f3200,ffff80002a3247f8,0,0,8) at sosend+0x804 sys/kern/uipc_socket.c:-1
sendit(ffff80003c4b7750,4,ffff80002a324970,8,ffff80002a324a30) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendmsg(ffff80003c4b7750,ffff80002a324ae0,ffff80002a324a30) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:597
syscall(ffff80002a324ae0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a324ae0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa72da34d7c0, count: -15
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299ddff0) 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
__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(ffffffff83976328) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff83976328) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165
end trace frame: 0x0, count: -5