login: witness: lock order reversal:
1st 0xfffffd806e7b68c0 vmmaplk (&map->lock)
2nd 0xfffffd807bbd65f8 inode (&ip->i_lock)
lock order "&ip->i_lock"(rrwlock) -> "&map->lock"(rwlock) first seen at:
#0 witness_checkorder+0x69c witness_lock_order_check sys/kern/subr_witness.c:2441 [inline]
#0 witness_checkorder+0x69c sys/kern/subr_witness.c:872
#1 rw_enter+0xd4
#2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5387
#3 uvm_map+0x2da sys/uvm/uvm_map.c:1226
#4 km_alloc+0x18b sys/uvm/uvm_km.c:908
#5 pool_multi_alloc_ni+0xd0 sys/kern/subr_pool.c:1692
#6 pool_p_alloc+0x74 pool_allocator_alloc sys/kern/subr_pool.c:1606 [inline]
#6 pool_p_alloc+0x74 sys/kern/subr_pool.c:927
#7 pool_do_get+0x10f sys/kern/subr_pool.c:712
#8 pool_get+0xeb sys/kern/subr_pool.c:581
#9 ufsdirhash_build+0x3ea sys/ufs/ufs/ufs_dirhash.c:180
#10 ufs_lookup+0x2a1 sys/ufs/ufs/ufs_lookup.c:200
#11 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91
#12 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#13 namei+0x63c sys/kern/vfs_lookup.c:249
#14 start_init+0xc9 check_console sys/kern/init_main.c:596 [inline]
#14 start_init+0xc9 sys/kern/init_main.c:636
#15 proc_trampoline+0x1c
lock order "&map->lock"(rwlock) -> "&ip->i_lock"(rrwlock) first seen at:
#0 witness_checkorder+0x69c witness_lock_order_check sys/kern/subr_witness.c:2441 [inline]
#0 witness_checkorder+0x69c sys/kern/subr_witness.c:872
#1 rw_enter+0xd4
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453
#3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:571
#5 uvn_io+0x2c8 sys/uvm/uvm_vnode.c:1189
#6 uvn_get+0x226 sys/uvm/uvm_vnode.c:1049
#7 uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023
#8 uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295
#9 uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2349
#10 sys_mlock+0x185 sys/uvm/uvm_mmap.c:765
#11 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#11 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#12 Xsyscall+0x128
Stopped at db_enter+0x18: 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+0x18 sys/arch/amd64/amd64/db_interface.c:398
witness_checkorder(fffffd807bbd65f8,9,0) at witness_checkorder+0x1009 witness_debugger sys/kern/subr_witness.c:2504 [inline]
witness_checkorder(fffffd807bbd65f8,9,0) at witness_checkorder+0x1009 sys/kern/subr_witness.c:1086
rw_enter(fffffd807bbd65e8,81) at rw_enter+0xd4
rrw_enter(fffffd807bbd65e8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:453
VOP_LOCK(fffffd807bbd7020,81) at VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615
vn_lock(fffffd807bbd7020,81) at vn_lock+0x81 sys/kern/vfs_vnops.c:571
uvn_io(fffffd806dc8e488,ffff800020b13598,1,2,0) at uvn_io+0x2c8 sys/uvm/uvm_vnode.c:1189
uvn_get(fffffd806dc8e488,0,ffff800020b137f0,ffff800020b13784,0,1) at uvn_get+0x226 sys/uvm/uvm_vnode.c:1049
uvm_fault(fffffd806e7b68a8,20002000,2,1) at uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023
uvm_fault_wire(fffffd806e7b68a8,20002000,20005000,1) at uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295
uvm_map_pageable_wire(fffffd806e7b68a8,fffffd806f0d5ee8,fffffd806f0d5d98,0,ffffffff81697ed7,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2349
sys_mlock(ffff800020ad0010,ffff800020b139e8,ffff800020b13a30) at sys_mlock+0x185 sys/uvm/uvm_mmap.c:765
syscall(ffff800020b13ab0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800020b13ab0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffff8f80, count: -14
ddb{0}> show registers
rdi 0x3
rsi 0xffffffff82481ba0 __sancov_gen_cov_switch_values.129
rbp 0xffff800020b13210
rbx 0x3
rdx 0x8b
rcx 0x3
rax 0x3
r8 0xffffffff81695cd2 witness_checkorder+0xfe2
r9 0x5
r10 0x24d4ffb43c64efd7
r11 0x70357cb678c9c64a
r12 0xfffffd80029761c0
r13 0
r14 0xffffffff825a94d0 w_lodata+0x4f3c0
r15 0xffffffff825af1a0 w_lodata+0x55090
rip 0xffffffff81dfc018 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800020b13200
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor3123) pid=289160 stat=onproc
flags process=2<EXEC> proc=0
pri=50, usrpri=50, nice=20
forw=0xffffffffffffffff, list=0xffff800020ad1158,0xffffffff8262c650
process=0xffff800020a9b190 user=0xffff800020b0e000, vmspace=0xfffffd806e7b68a8
estcpu=0, cpticks=1, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
*93634 289160 48500 0 7 0x2 syz-executor3123
48500 226038 42850 0 3 0x10008a pause ksh
42850 438301 66890 0 3 0x92 select sshd
5978 423571 1 0 3 0x100083 ttyin getty
66890 40837 1 0 3 0x80 select sshd
24355 409436 9850 74 3 0x100092 bpf pflogd
9850 153672 1 0 3 0x80 netio pflogd
98776 213776 22504 73 3 0x100090 kqread syslogd
22504 231816 1 0 3 0x100082 netio syslogd
19784 140010 1 77 3 0x100090 poll dhclient
19335 492206 1 0 3 0x80 poll dhclient
90723 91973 0 0 3 0x14200 pgzero zerothread
13340 353420 0 0 3 0x14200 aiodoned aiodoned
8164 385459 0 0 3 0x14200 syncer update
56747 459072 0 0 3 0x14200 cleaner cleaner
65553 376222 0 0 3 0x14200 reaper reaper
98989 72977 0 0 3 0x14200 pgdaemon pagedaemon
71336 189637 0 0 3 0x14200 bored crynlk
88357 398910 0 0 3 0x14200 bored crypto
70987 79073 0 0 3 0x40014200 acpi0 acpi0
69614 219293 0 0 7 0x40014200 idle1
27410 432895 0 0 3 0x14200 bored softnet
66686 524027 0 0 3 0x14200 bored systqmp
38505 297139 0 0 3 0x14200 bored systq
73210 423173 0 0 3 0x40014200 bored softclock
2798 113912 0 0 3 0x40014200 idle0
24400 496656 0 0 3 0x14200 bored smr
1 103949 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
Process 93634 (syz-executor3123) thread 0xffff800020ad0010 (289160)
shared rwlock vmmaplk r = 0 (0xfffffd806e7b68c0)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:309
#2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5387
#3 uvm_map_pageable+0x11d sys/uvm/uvm_map.c:2445
#4 sys_mlock+0x185 sys/uvm/uvm_mmap.c:765
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#6 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82626000)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9461 6393K 6394K 78643K 10552 0
pcb 13 8K 8K 78643K 13 0
rtable 61 2K 2K 78643K 127 0
ifaddr 29 8K 8K 78643K 30 0
counters 39 33K 33K 78643K 39 0
ioctlops 0 0K 4K 78643K 1467 0
mount 1 1K 1K 78643K 1 0
vnodes 1181 74K 74K 78643K 1186 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 1809 196K 290K 78643K 12766 0
file desc 1 0K 0K 78643K 1 0
proc 59 63K 71K 78643K 358 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 18 79K 79K 78643K 18 0
exec 0 0K 1K 78643K 177 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 67 3K 4K 78643K 816 0
UVM aobj 2 2K 2K 78643K 2 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 4 0K 0K 78643K 4 0
temp 27 3003K 3067K 78643K 1978 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> 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 80 15 0 13 1 0 1 1 0 8 0
rtentry 112 23 0 1 1 0 1 1 0 8 0
unpcb 120 29 0 19 1 0 1 1 0 8 0
syncache 264 5 0 5 1 0 1 1 0 8 1
tcpcb 544 8 0 5 1 0 1 1 0 8 0
inpcb 280 29 0 23 1 0 1 1 0 8 0
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 8 0 0 1 0 1 1 0 8 0
pfstkey 112 8 0 0 1 0 1 1 0 8 0
pfstate 328 8 0 0 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 96 0 0 6 0 6 6 0 8 0
art_table 32 97 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
dino1pl 128 1403 0 16 45 0 45 45 0 8 0
ffsino 272 1403 0 16 93 0 93 93 0 8 0
nchpl 144 1578 0 34 58 0 58 58 0 8 0
uvmvnodes 72 1413 0 0 26 0 26 26 0 8 0
vnodes 208 1413 0 0 75 0 75 75 0 8 0
namei 1024 3774 0 3774 1 0 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 2524 0 2524 2 1 1 2 0 8 1
plimitpl 152 14 0 8 1 0 1 1 0 8 0
sigapl 432 204 0 192 2 0 2 2 0 8 0
knotepl 112 5 0 0 1 0 1 1 0 8 0
kqueuepl 104 1 0 0 1 0 1 1 0 8 0
pipepl 160 128 0 121 1 0 1 1 0 8 0
fdescpl 488 205 0 192 3 0 3 3 0 8 0
filepl 152 997 0 948 2 0 2 2 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 112 18 0 9 1 0 1 1 0 8 0
pgrppl 48 18 0 9 1 0 1 1 0 8 0
ucredpl 96 52 0 43 1 0 1 1 0 8 0
zombiepl 144 192 0 192 1 0 1 1 0 8 1
processpl 896 220 0 192 4 0 4 4 0 8 0
procpl 632 220 0 192 3 0 3 3 0 8 0
sockpl 384 73 0 55 2 0 2 2 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 56 0 0 7 0 7 7 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 81 0 0 5 0 5 5 0 8 0
bufpl 280 2200 0 274 138 0 138 138 0 8 0
anonpl 16 19206 0 17967 7 1 6 7 0 125 0
amapchunkpl 152 522 0 485 2 0 2 2 0 158 0
amappl16 192 30 0 28 1 0 1 1 0 8 0
amappl15 184 50 0 46 1 0 1 1 0 8 0
amappl14 176 15 0 14 1 0 1 1 0 8 0
amappl12 160 3 0 3 1 0 1 1 0 8 1
amappl11 152 51 0 35 1 0 1 1 0 8 0
amappl10 144 5 0 2 1 0 1 1 0 8 0
amappl9 136 419 0 418 1 0 1 1 0 8 0
amappl8 128 68 0 64 1 0 1 1 0 8 0
amappl7 120 76 0 68 1 0 1 1 0 8 0
amappl6 112 47 0 45 1 0 1 1 0 8 0
amappl5 104 126 0 112 1 0 1 1 0 8 0
amappl4 96 459 0 434 1 0 1 1 0 8 0
amappl3 88 109 0 102 1 0 1 1 0 8 0
amappl2 80 820 0 765 2 0 2 2 0 8 0
amappl1 72 14029 0 13606 15 5 10 15 0 8 0
amappl 80 408 0 387 1 0 1 1 0 84 0
dma4096 4096 1 0 1 1 1 0 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 1 0 0 1 0 1 1 0 8 0
uaddrrnd 24 205 0 192 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 205 0 192 1 0 1 1 0 8 0
vmmpekpl 168 5344 0 5323 1 0 1 1 0 8 0
vmmpepl 168 29611 0 28762 49 8 41 49 0 357 1
vmsppl 368 204 0 192 2 0 2 2 0 8 0
pdppl 4096 417 0 384 5 0 5 5 0 8 0
pvpl 32 79469 0 76468 29 0 29 29 0 265 2
pmappl 232 204 0 192 1 0 1 1 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 129 0 3 4 0 4 4 0 8 0