kernel: protection fault trap, code=0
Stopped at      witness_checkorder+0xb5:        movl    0x20(%r14),%r15d
ddb{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> show kasan
No such command
ddb{1}> trace
witness_checkorder(deadbeefdeadc007,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779
mtx_enter(deadbeefdeadbff7) at mtx_enter+0x95 sys/kern/kern_lock.c:406
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff800045ffdc90) at reaper+0x2ec sys/kern/kern_exit.c:518
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi                                0
rsi                                0
rbp               0xffff80002a1f49d0
rbx                                0
rdx                                0
rcx               0xffff800045ffdc90
rax               0xffff80002999dffe
r8                0xffffffffffffffff
r9                               0x1
r10               0x3bde35c8480a49b1
r11               0xed21d52aeec377a1
r12               0xdeadbeefdeadc0fe
r13                              0x9
r14               0xdeadbeefdeadc007
r15                                0
rip               0xffffffff8313df85    witness_checkorder+0xb5
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80002a1f4930
ss                              0x10
witness_checkorder+0xb5:        movl    0x20(%r14),%r15d
ddb{1}> show proc
PROC (reaper) tid=15067 pid=9205 tcnt=1 stat=onproc
    flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
    runpri=32, usrpri=50, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff800045fff9f0,0xffff800045ffcd10
    process=0xffff800045ffb9c0 user=0xffff80002a1ef000, vmspace=0xffffffff83a728a8
    estcpu=0, cpticks=4, pctcpu=0.1, user=0, sys=0, intr=0
ddb{1}> ps
   PID     TID   PPID   UID  S      PRLAGS     PFLAGS WAIT      COMMAND
 59425   92621  70476 32767  3      0x1010     0x2000 suspend   syz-executor
 59425   21006  70476 32767  2      0x1010  0x4080000           syz-executor
 75604  445584  72237 32767  2        0x10          0           syz-executor
 75604  442833  72237 32767  3        0x10  0x4000080 fsleep    syz-executor
 75604  411298  72237 32767  2        0x10  0x4000000           syz-executor
 93138   12879  26734 32767  2        0x10          0           syz-executor
 93138  189525  26734 32767  7        0x10  0x4000000           syz-executor
 73034   22898  79248 32767  3      0x1010     0x2000 suspend   syz-executor
 73034  178736  79248 32767  2      0x1010  0x4080080           syz-executor
 73034  252890  79248 32767  2      0x1010  0x4080080           syz-executor
 73034   49483  79248 32767  2      0x1010  0x4080080           syz-executor
 24602  154647   3869     0  2         0x2          0           syz-executor
 72237  345366  98143 32767  3        0x10       0x80 nanoslp   syz-executor
 98927  238523  46978 32767  3        0x10          0 biowait   syz-executor
 79248    2695  35401 32767  3        0x10       0x80 nanoslp   syz-executor
 18791  403983  18227 32767  2        0x10          0           syz-executor
 70476  457586  86381 32767  3        0x10       0x80 nanoslp   syz-executor
 20868  382899  72424 32767  2        0x10          0           syz-executor
 26734  161890  98388 32767  3        0x10       0x80 nanoslp   syz-executor
 98143  101809   3869     0  3         0x2       0x80 wait      syz-executor
 98388  222717   3869     0  3         0x2       0x80 wait      syz-executor
 86381  364555   3869     0  3         0x2       0x80 wait      syz-executor
 46978   30823   3869     0  3         0x2       0x80 wait      syz-executor
 72424   53700   3869     0  3         0x2       0x80 wait      syz-executor
 35401    8128   3869     0  3         0x2       0x80 wait      syz-executor
 18227   12014   3869     0  3         0x2       0x80 wait      syz-executor
  3869  313732  68608     0  2         0x2       0x80           syz-executor
 68608  109610  84395     0  3    0x100002       0x88 sigsusp   ksh
 84395  516467  89788     0  3        0x10       0x88 kqread    sshd-session
 89788  133234  15071     0  3        0x12       0x80 kqread    sshd-session
 68006   70911      1     0  3    0x100003       0x80 ttyin     getty
 15071   61680      1     0  3           0       0x88 kqread    sshd
 83038  166900  74541    73  3   0x1100010       0x80 kqread    syslogd
 74541  441913      1     0  3    0x100002       0x80 sbwait    syslogd
 77708  522425      1     0  3    0x100000       0x80 kqread    resolvd
 27176  116652  68257    77  3    0x100012       0x80 kqread    dhcpleased
 64178  213173  68257    77  3    0x100012       0x80 kqread    dhcpleased
 68257  454372      1     0  3           0       0x80 kqread    dhcpleased
 56219  128124      0     0  3     0x14000      0x200 bored     smr
 17696  335934      0     0  2     0x14000      0x200           zerothread
 92790  102154      0     0  3     0x14000      0x200 aiodoned  aiodoned
 46092   95470      0     0  3     0x14000      0x200 syncer    update
 31735  379728      0     0  3     0x14000      0x200 cleaner   cleaner
* 9205   15067      0     0  7     0x14000      0x200           reaper
 46613  494014      0     0  3     0x14000      0x200 pgdaemon  pagedaemon
 87345  218895      0     0  3     0x14000      0x200 bored     viomb
 59277    9165      0     0  3     0x14000 0x40000200 acpi0     acpi0
 89942  294166      0     0  3     0x14000 0x40000200           idle1
 17150  335113      0     0  3     0x14000      0x200 bored     softnet1
 63205   53834      0     0  2     0x14000      0x200           softnet0
 81641  441703      0     0  3     0x14000      0x200 bored     systqmp
 25177   32403      0     0  3     0x14000      0x200 bored     systq
 34848  122849      0     0  3     0x14000      0x200 tmoslp    softclockmp
 94873  474817      0     0  3     0x14000 0x40000200 tmoslp    softclock
 20898  499650      0     0  3     0x14000 0x40000200           idle0
     1  252568      0     0  3         0x2       0x80 wait      init
     0       0     -1     0  3     0x10000      0x200 scheduler swapper
ddb{1}> show all locks
Process 93138 (syz-executor) thread 0xffff800045fe4d20 (189525)
shared rwlock vmmaplk r = 0 (0xfffff8006d15daa8)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2  uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3  uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4  uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5  kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
#6  kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528
#7  alltraps_kern_meltdown+0x7b
#8  copyout+0x64
#9  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#10 Xsyscall+0x128
Process 98927 (syz-executor) thread 0xffff800045fe62b8 (238523)
exclusive rrwlock inode r = 0 (0xfffff8007090e110)
#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  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5  vget+0x2a2 sys/kern/vfs_subr.c:692
#6  ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
#7  ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
#8  ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478
#9  VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#11 namei+0x7c5 sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807
#13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffff8006d883678)
#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  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5  vfs_lookup+0x12b sys/kern/vfs_lookup.c:431
#6  namei+0x7c5 sys/kern/vfs_lookup.c:250
#7  dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807
#8  syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8  syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#9  Xsyscall+0x128
Process 18791 (syz-executor) thread 0xffff800045fef770 (403983)
exclusive rrwlock inode r = 0 (0xfffff8006abd9440)
#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  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5  vget+0x2a2 sys/kern/vfs_subr.c:692
#6  ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
#7  ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
#8  ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478
#9  VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#11 namei+0x7c5 sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807
#13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffff8006e0e6b10)
#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  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5  vfs_lookup+0x12b sys/kern/vfs_lookup.c:431
#6  namei+0x7c5 sys/kern/vfs_lookup.c:250
#7  dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807
#8  syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8  syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#9  Xsyscall+0x128
Process 9205 (reaper) thread 0xffff800045ffdc90 (15067)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a10900)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2  sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#3  rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298
#4  knote_processexit+0x2b sys/kern/kern_event.c:2235
#5  reaper+0x26d sys/kern/kern_exit.c:515
#6  proc_trampoline+0x10
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11049  12016K   12034K 166960K     12143        0
            pcb    17     12K      12K 166960K        17        0
         rtable   217      6K       7K 166960K       353        0
             pf    29     16K      16K 166960K        31        0
         ifaddr    38      6K       7K 166960K        44        0
        ifgroup    46      2K       2K 166960K        50        0
         sysctl     3      1K       9K 166960K         7        0
       counters    68     36K      37K 166960K        70        0
       ioctlops     0      0K       4K 166960K        36        0
            iov     0      0K       0K 166960K         2        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1287     81K      81K 166960K      1456        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       9K 166960K         6        0
         VM map     2      1K       1K 166960K         2        0
            sem     7      0K       0K 166960K        10        0
        dirhash    12      2K       2K 166960K        12        0
           ACPI  1734    201K     291K 166960K     11964        0
      file desc    21     77K     125K 166960K       262        0
          sigio     0      0K       0K 166960K         6        0
           proc    58     99K     147K 166960K       522        0
        subproc    72      4K       4K 166960K       126        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     1      0K       0K 166960K        23        0
       in_multi    88      5K       6K 166960K        99        0
    ether_multi     1      0K       0K 166960K         1        0
            mrt     0      0K       0K 166960K         5        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys    73    334K     334K 166960K        73        0
           exec     0      0K       1K 166960K       367        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   234    192K     213K 166960K      3927        0
       UVM aobj     6      2K       2K 166960K         7        0
     pinsyscall    42     84K     111K 166960K      1352        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K         2        0
            NDP    10      0K       2K 166960K        27        0
           temp    35   9114K    9120K 166960K      4042        0
         kqueue    15     22K      26K 166960K        50        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       28    0        0     1     0     1     1     0     8    0
rtpcb      120       41    0       38     1     0     1     1     0     8    0
rtentry    176      112    0       12     6     0     6     6     0     8    0
unpcb      144      153    0      138     1     0     1     1     0     8    0
syncache   336        7    0        7     1     0     1     1     0     8    1
tcpcb      736      175    0      106     7     0     7     7     0     8    0
arp        136       18    0        2     1     0     1     1     0     8    0
ipq         40        1    0        0     1     0     1     1     0     8    0
ipqe        40        1    0        0     1     0     1     1     0     8    0
inpcb      328      421    0      282    15     3    12    12     0     8    0
ip6q        72        1    0        0     1     0     1     1     0     8    0
ip6af       40        1    0        0     1     0     1     1     0     8    0
nd6        152       25    0        3     1     0     1     1     0     8    0
kcovpl      48       13    0        6     1     0     1     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      467    0       44    30     0    30    30     0     8    0
art_table   40      468    0       44     5     0     5     5     0     8    0
art_node    32      112    0       21     1     0     1     1     0     8    0
semapl      72        8    0        3     1     0     1     1     0     8    0
shmpl      112        4    0        1     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1741    0      273    92     0    92    92     0     8    0
ffsino     296     1741    0      273   114     0   114   114     0     8    0
nchpl      144     2074    0      382    63     0    63    63     0     8    0
vnodes     216     1876    0        0   105     0   105   105     0     8    0
namei      1024    6662    0     6662     2     0     2     2     0     8    2
percpumem   16       51    0        1     1     0     1     1     0     8    0
kstatmem   264       25    0        2     2     0     2     2     0     8    0
scxspl     216     6677    0     6676     4     2     2     3     1     8    1
plimitpl   152       61    0       37     2     0     2     2     0     8    1
sigapl     424      543    0      494     7     0     7     7     0     8    1
knotepl    120      335    0        0    11     0    11    11     0     8    0
kqueuepl   224       49    0       39     1     0     1     1     0     8    0
pipepl     344      157    0      130     3     0     3     3     0     8    0
fdescpl    528      527    0      494     4     0     4     4     0     8    1
filepl     160     2630    0     2290    17     0    17    17     0     8    2
lockfpl    104       26    0       24     1     0     1     1     0     8    0
lockfspl    48       13    0       11     1     0     1     1     0     8    0
sessionpl  144       72    0       57     1     0     1     1     0     8    0
pgrppl      48       87    0       64     1     0     1     1     0     8    0
ucredpl    104      404    0      386     1     0     1     1     0     8    0
zombiepl   144      495    0      494     1     0     1     1     0     8    0
processpl  1232     543    0      494     5     0     5     5     0     8    0
procpl     664      711    0      653     6     0     6     6     0     8    0
sockpl     752      615    0      458    21     5    16    16     0     8    0
mcl64k     65536      1    0        0     1     0     1     1     0     8    0
mcl16k     16384      2    0        0     1     0     1     1     0     8    0
mcl8k      8192       1    0        0     1     0     1     1     0     8    0
mcl4k      4096     134    0        0    17     0    17    17     0     8    0
mcl2k      2048      24    0        0     3     0     3     3     0     8    0
mextrefs    64       23    0        0     1     0     1     1     0     8    0
mtagpl      96        5    0        0     1     0     1     1     0     8    0
mbufpl     256     1238    0        0    78     0    78    78     0     8    0
bufpl      272     2352    0      102   150     0   150   150     0     8    0
anonpl      32     5245    0        0    44     1    43    44     0   247    0
amapchunkpl 152   11305    0    10825    29     0    29    29     0   158    6
amappl16   200     1277    0     1258     4     2     2     4     0     8    0
amappl15   192       73    0       73     1     1     0     1     0     8    0
amappl14   184      400    0      398     1     0     1     1     0     8    0
amappl13   176      119    0      109     1     0     1     1     0     8    0
amappl12   168      763    0      731     2     0     2     2     0     8    0
amappl11   160       11    0       11     1     1     0     1     0     8    0
amappl10   152       60    0       50     1     0     1     1     0     8    0
amappl9    144      272    0      271     1     0     1     1     0     8    0
amappl8    136      126    0      125     1     0     1     1     0     8    0
amappl7    128      143    0      132     1     0     1     1     0     8    0
amappl6    120      162    0      161     1     0     1     1     0     8    0
amappl5    112      116    0      109     1     0     1     1     0     8    0
amappl4    104      267    0      251     1     0     1     1     0     8    0
amappl3     96     1946    0     1856     4     1     3     3     0     8    0
amappl2     88      660    0      588     2     0     2     2     0     8    0
amappl1     80    11410    0    10869    15     0    15    15     0     8    2
amappl      88     3211    0     3045     5     0     5     5     0    92    0
uvmvnodes   80      103    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      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        6    0        1     1     0     1     1     0     8    0
uaddrrnd    24      527    0      494     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      527    0      494     1     0     1     1     0     8    0
vmmpekpl   168     6586    0     6549     3     0     3     3     0     8    0
vmmpepl    168    43581    0    41731    99     0    99    99     0   357   11
vmsppl     488      526    0      494     7     1     6     6     0     8    1
rwobjpl     80    15509    0    14597    24     0    24    24     0     8    2
pdppl      4096    1061    0      988   107    26    81    97     0     8    8
pvpl        32    12120    0        0    98     0    98    98     0   265    0
pmappl     256      526    0      494     4     1     3     3     0     8    0
extentpl    40       46    0       28     1     0     1     1     0     8    0
phpool     112      501    0       29    14     0    14    14     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff839d2ff0) 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(ffffffff83a10100) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83a10100) at __mp_lock+0x192 sys/kern/kern_lock.c:173
intr_handler(ffff80002e7cbb50,ffff8000002a2900) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x95 kd_claim sys/dev/kcov.c:632 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x95 sys/dev/kcov.c:157
_rb_root(ffffffff835b9b90,fffff8006d15d9b8) at _rb_root+0x3d rb_e2n sys/kern/subr_tree.c:-1 [inline]
_rb_root(ffffffff835b9b90,fffff8006d15d9b8) at _rb_root+0x3d sys/kern/subr_tree.c:539
uvm_map_lookup_entry(fffff8006d15d9a8,1000,ffff80002e7cbed8) at uvm_map_lookup_entry+0x106 uvm_map_entrybyaddr sys/uvm/uvm_map.c:-1 [inline]
uvm_map_lookup_entry(fffff8006d15d9a8,1000,ffff80002e7cbed8) at uvm_map_lookup_entry+0x106 sys/uvm/uvm_map.c:1571
uvmfault_lookup(ffff80002e7cbeb0,0) at uvmfault_lookup+0x133 sys/uvm/uvm_fault.c:1880
uvm_fault_check(ffff80002e7cbeb0,ffff80002e7cbee8,ffff80002e7cbf20,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
uvm_fault(fffff8006d15d9a8,1000,0,2) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627
kpageflttrap(ffff80002e7cc060,1b00) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283
kerntrap(ffff80002e7cc060) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
copyout() at copyout+0x64
syscall(ffff80002e7cc4a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002e7cc4a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x9b4190d3530, count: -18
ddb{0}> machine ddbcpu 1
Stopped at      witness_checkorder+0xb5:        movl    0x20(%r14),%r15d
ddb{1}> trace
witness_checkorder(deadbeefdeadc007,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779
mtx_enter(deadbeefdeadbff7) at mtx_enter+0x95 sys/kern/kern_lock.c:406
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff800045ffdc90) at reaper+0x2ec sys/kern/kern_exit.c:518
end trace frame: 0x0, count: -4