witness: lock order reversal:
1st 0xfffffd807001d068 fdlock (&newfdp->fd_fd.fd_lock)
2nd 0xfffffd806d6e62c8 inode (&ip->i_lock)
lock order data w2 -> w1 missing
lock order data w1 -> w2 missing
Stopped at db_enter+0x18: 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+0x18 sys/arch/amd64/amd64/db_interface.c:398
witness_checkorder(fffffd806d6e62c8,9,0) at witness_checkorder+0x108b
rw_enter(fffffd806d6e62b8,1) at rw_enter+0xd4
rrw_enter(fffffd806d6e62b8,1) at rrw_enter+0x88 sys/kern/kern_rwlock.c:461
VOP_LOCK(fffffd806d8c9690,2001) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
vn_lock(fffffd806d8c9690,2001) at vn_lock+0x6c sys/kern/vfs_vnops.c:575
vget(fffffd806d8c9690,2001) at vget+0x1c6 sys/kern/vfs_subr.c:671
ktrwriteraw(ffff8000211fed20,fffffd806d8c9690,fffffd807f7b76c0,ffff8000212697a0,ffff800021269780) at ktrwriteraw+0x138 sys/kern/kern_ktrace.c:659
ktrstruct(ffff8000211fed20,ffffffff823b3070,ffff800021269888,8) at ktrstruct+0x169 ktrwrite2 sys/kern/kern_ktrace.c:627 [inline]
ktrstruct(ffff8000211fed20,ffffffff823b3070,ffff800021269888,8) at ktrstruct+0x169 sys/kern/kern_ktrace.c:311
sys_socketpair(ffff8000211fed20,ffff8000212698f8,ffff800021269940) at sys_socketpair+0x3ed sys/kern/uipc_syscalls.c:470
syscall(ffff8000212699c0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000212699c0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2c811fa72b0, count: -12
ddb{1}> show registers
rdi 0x3
rsi 0xffffffff826ee900 __sancov_gen_cov_switch_values.134
rbp 0xffff8000212693c0
rbx 0x3
rdx 0x8b
rcx 0x3
rax 0x1
r8 0xffffffff813b9c91 witness_checkorder+0x1061
r9 0x5
r10 0x4f21151a3a6e42c3
r11 0x4ea7689cdf50b67a
r12 0
r13 0xfffffd806d6e62c8
r14 0
r15 0xfffffd8002cf0600
rip 0xffffffff8153d808 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff8000212693b0
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor7266) pid=511273 stat=onproc
flags process=0 proc=4000001<INKTR,THREAD>
pri=17, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff8000211ff260,0xffffffff8279c450
process=0xffff8000212261d0 user=0xffff800021264000, vmspace=0xfffffd80084ae730
estcpu=2, cpticks=0, pctcpu=0.0
user=0, sys=0, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
31191 340983 28270 0 7 0 syz-executor7266
*31191 511273 28270 0 7 0x4000001 syz-executor7266
10445 259829 89945 0 3 0x80 nanoslp syz-executor7266
10445 467822 89945 0 3 0x4000080 fifow syz-executor7266
10445 207946 89945 0 3 0x4000080 fsleep syz-executor7266
89945 111322 57427 0 3 0x80 nanoslp syz-executor7266
28270 345321 57427 0 3 0x80 nanoslp syz-executor7266
57427 302433 3447 0 3 0x82 nanoslp syz-executor7266
3447 226352 88274 0 3 0x10008a sigsusp ksh
88274 174250 81820 0 3 0x92 select sshd
91331 54673 1 0 3 0x100083 ttyin getty
81820 248159 1 0 3 0x80 select sshd
63828 385716 13728 74 3 0x100092 bpf pflogd
13728 230122 1 0 3 0x80 netio pflogd
36725 440377 61430 73 3 0x100090 kqread syslogd
61430 92776 1 0 3 0x100082 netio syslogd
45707 70131 1 77 3 0x100090 poll dhclient
23160 358963 1 0 3 0x80 poll dhclient
74959 115946 0 0 3 0x14200 bored smr
88434 347845 0 0 3 0x14200 pgzero zerothread
4540 500295 0 0 3 0x14200 aiodoned aiodoned
86655 398511 0 0 3 0x14200 syncer update
96944 165617 0 0 3 0x14200 cleaner cleaner
90196 168795 0 0 3 0x14200 reaper reaper
22264 190850 0 0 3 0x14200 pgdaemon pagedaemon
54267 223785 0 0 3 0x14200 bored crynlk
10973 67692 0 0 3 0x14200 bored crypto
7207 110567 0 0 3 0x14200 bored viomb
96976 85760 0 0 3 0x40014200 acpi0 acpi0
79350 109306 0 0 3 0x40014200 idle1
48581 360594 0 0 3 0x14200 bored softnet
56492 64775 0 0 3 0x14200 bored systqmp
7968 73942 0 0 3 0x14200 bored systq
73106 80633 0 0 3 0x40014200 bored softclock
65918 107480 0 0 3 0x40014200 idle0
1 267607 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 31191 (syz-executor7266) thread 0xffff8000211fed20 (511273)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828d8de8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 ktrstruct+0xee
#2 sys_socketpair+0x3ed sys/kern/uipc_syscalls.c:470
#3 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#4 Xsyscall+0x128
exclusive rwlock fdlock r = 0 (0xfffffd807001d068)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 sys_socketpair+0x219
#2 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#2 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#3 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9475 6411K 6412K 78643K 10565 0
pcb 13 8K 8K 78643K 13 0
rtable 61 2K 2K 78643K 119 0
ifaddr 29 8K 8K 78643K 30 0
counters 40 33K 33K 78643K 40 0
ioctlops 0 0K 4K 78643K 1467 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 1 0
vnodes 1184 74K 75K 78643K 1191 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 2 0K 0K 78643K 2 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 1 0K 0K 78643K 1 0
proc 59 63K 71K 78643K 357 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 11 0K 0K 78643K 11 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 19 95K 95K 78643K 19 0
exec 0 0K 2K 78643K 300 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 100 4K 5K 78643K 1437 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 4 0K 0K 78643K 4 0
temp 23 3965K 4029K 78643K 1685 0
kqueue 2 2K 2K 78643K 2 0
SYN cache 2 16K 16K 78643K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 2 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 15 0 13 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 120 45 0 29 1 0 1 1 0 8 0
syncache 296 5 0 5 2 1 1 1 0 8 1
tcpcb 736 8 0 5 1 0 1 1 0 8 0
inpcb 304 28 0 23 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 9 0 2 1 0 1 1 0 8 0
pfstkey 112 9 0 2 1 0 1 1 0 8 0
pfstate 320 9 0 2 1 0 1 1 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 97 0 0 7 0 7 7 0 8 0
art_table 32 98 0 0 1 0 1 1 0 8 0
art_node 16 22 0 2 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1415 0 25 87 0 87 87 0 8 0
ffsino 272 1415 0 25 93 0 93 93 0 8 0
nchpl 144 1602 0 51 58 0 58 58 0 8 0
uvmvnodes 72 1425 0 0 26 0 26 26 0 8 0
vnodes 224 1425 0 0 84 0 84 84 0 8 0
namei 1024 3819 0 3819 2 1 1 1 0 8 1
percpumem 16 31 0 0 1 0 1 1 0 8 0
scxspl 216 3700 0 3700 11 10 1 8 0 8 1
plimitpl 152 14 0 8 1 0 1 1 0 8 0
sigapl 424 227 0 194 4 0 4 4 0 8 0
futexpl 56 8 0 7 1 0 1 1 0 8 0
knotepl 112 5 0 0 1 0 1 1 0 8 0
kqueuepl 168 1 0 0 1 0 1 1 0 8 0
pipepl 336 64 0 60 2 1 1 1 0 8 0
fdescpl 496 211 0 194 3 0 3 3 0 8 0
filepl 152 974 0 921 3 0 3 3 0 8 0
lockfpl 104 5 0 4 1 0 1 1 0 8 0
lockfspl 48 3 0 2 1 0 1 1 0 8 0
sessionpl 144 18 0 9 1 0 1 1 0 8 0
pgrppl 48 18 0 9 1 0 1 1 0 8 0
ucredpl 96 62 0 53 1 0 1 1 0 8 0
zombiepl 144 194 0 194 2 1 1 1 0 8 1
processpl 1080 227 0 194 3 0 3 3 0 8 0
procpl 672 236 0 200 4 0 4 4 0 8 0
sockpl 432 88 0 65 4 1 3 3 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 91 0 0 10 0 10 10 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 97 0 0 6 0 6 6 0 8 0
bufpl 280 2025 0 90 139 0 139 139 0 8 0
anonpl 24 30202 0 27664 19 3 16 16 0 186 0
amapchunkpl 152 2760 0 2574 9 1 8 8 0 158 0
amappl16 200 38 0 34 2 1 1 1 0 8 0
amappl15 192 51 0 46 1 0 1 1 0 8 0
amappl13 176 14 0 13 2 1 1 1 0 8 0
amappl12 168 24 0 21 1 0 1 1 0 8 0
amappl11 160 39 0 28 1 0 1 1 0 8 0
amappl10 152 6 0 2 1 0 1 1 0 8 0
amappl9 144 241 0 241 2 2 0 1 0 8 0
amappl8 136 241 0 235 1 0 1 1 0 8 0
amappl7 128 36 0 33 1 0 1 1 0 8 0
amappl6 120 82 0 73 1 0 1 1 0 8 0
amappl5 112 129 0 119 1 0 1 1 0 8 0
amappl4 104 475 0 452 1 0 1 1 0 8 0
amappl3 96 37 0 31 1 0 1 1 0 8 0
amappl2 88 346 0 307 1 0 1 1 0 8 0
amappl1 80 6732 0 6339 11 2 9 9 0 8 0
amappl 88 1230 0 1148 2 0 2 2 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 64 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 211 0 194 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 211 0 194 1 0 1 1 0 8 0
vmmpekpl 168 5473 0 5456 1 0 1 1 0 8 0
vmmpepl 168 20056 0 19092 47 4 43 43 0 357 1
vmsppl 368 210 0 194 2 0 2 2 0 8 0
rwobjpl 56 6220 0 5684 10 2 8 8 0 8 0
pdppl 4096 429 0 388 59 18 41 41 0 8 0
pvpl 32 98921 0 94409 42 5 37 37 0 265 0
pmappl 232 210 0 194 1 0 1 1 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 279 0 23 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff826c9ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff828d8be0) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828d8be0) at __mp_lock+0x129 sys/kern/kern_lock.c:147
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
end of kernel
end trace frame: 0x7f7ffffd9ba0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x18: addq $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
witness_checkorder(fffffd806d6e62c8,9,0) at witness_checkorder+0x108b
rw_enter(fffffd806d6e62b8,1) at rw_enter+0xd4
rrw_enter(fffffd806d6e62b8,1) at rrw_enter+0x88 sys/kern/kern_rwlock.c:461
VOP_LOCK(fffffd806d8c9690,2001) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
vn_lock(fffffd806d8c9690,2001) at vn_lock+0x6c sys/kern/vfs_vnops.c:575
vget(fffffd806d8c9690,2001) at vget+0x1c6 sys/kern/vfs_subr.c:671
ktrwriteraw(ffff8000211fed20,fffffd806d8c9690,fffffd807f7b76c0,ffff8000212697a0,ffff800021269780) at ktrwriteraw+0x138 sys/kern/kern_ktrace.c:659
ktrstruct(ffff8000211fed20,ffffffff823b3070,ffff800021269888,8) at ktrstruct+0x169 ktrwrite2 sys/kern/kern_ktrace.c:627 [inline]
ktrstruct(ffff8000211fed20,ffffffff823b3070,ffff800021269888,8) at ktrstruct+0x169 sys/kern/kern_ktrace.c:311
sys_socketpair(ffff8000211fed20,ffff8000212698f8,ffff800021269940) at sys_socketpair+0x3ed sys/kern/uipc_syscalls.c:470
syscall(ffff8000212699c0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000212699c0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x2c811fa72b0, count: -12
ddb{1}>