panic: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1207
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 127647  57107      0           0          0    0  syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834b75fb) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff834fac73,ffffffff834eae39,4b7,ffffffff8344d35f) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffff88008f1d4a8) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffff8806cc99d78,5b052c6b000,5b052c6c000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffff8806cc99d78,fffff8806f28a8d8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_map_teardown(fffff8806cc99d78) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffff8806cc99d78) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497
exit1(ffff80003a7c0d30,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260
sys_exit(ffff80003a7c0d30,ffff800031f95aa0,ffff800031f959f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800031f95aa0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800031f95aa0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a6f91c47ee0, count: 4
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1207
ddb{1}> show kasan
No such command
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834b75fb) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff834fac73,ffffffff834eae39,4b7,ffffffff8344d35f) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffff88008f1d4a8) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffff8806cc99d78,5b052c6b000,5b052c6c000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffff8806cc99d78,fffff8806f28a8d8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_map_teardown(fffff8806cc99d78) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffff8806cc99d78) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497
exit1(ffff80003a7c0d30,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260
sys_exit(ffff80003a7c0d30,ffff800031f95aa0,ffff800031f959f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800031f95aa0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800031f95aa0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a6f91c47ee0, count: -11
ddb{1}> show registers
rdi                                0
rsi                              0x1
rbp               0xffff800031f956c0
rbx               0xffff80002999ee07
rdx                                0
rcx               0xffff80003a7c0d30
rax               0xffff80002999dff0
r8                 0x101010101010101
r9                0x8080808080808080
r10               0xcece6b1d9089dfc7
r11               0x231504c4d6a0e538
r12               0xffff80002999ec08
r13                                0
r14                                0
r15                              0x1
rip               0xffffffff82540d55    db_enter+0x25
cs                               0x8
rflags                         0x246
rsp               0xffff800031f956b0
ss                              0x10
db_enter+0x25:  addq    $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=273164 pid=1522 tcnt=0 stat=onproc
    flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
    runpri=32, usrpri=79, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0xffff80003a7c0d30 scnt=-1 ecnt=1
    forw=0xffffffffffffffff, list=0xffff80003a7c1a28,0xffff80003a7bc038
    process=0xffff80002a3804e8 user=0xffff800031f90000, vmspace=0xfffff8806cc99d78
    estcpu=29, cpticks=8, pctcpu=0.6, user=0, sys=2, intr=0
ddb{1}> ps
   PID     TID   PPID   UID  S      PRLAGS     PFLAGS WAIT      COMMAND
 57107  127647  93827     0  7           0          0           syz-executor
 57107   88148  93827     0  2           0  0x4000000           syz-executor
 57107  312762  93827     0  2           0  0x4000000           syz-executor
 56259  313214  79924     0  2           0          0           syz-executor
 56259  194932  79924     0  3           0  0x4000080 fsleep    syz-executor
 82056  395884  92072     0  2           0          0           syz-executor
 82056  299561  92072     0  3           0  0x4000080 fsleep    syz-executor
 25241  101032   3528     0  2           0      0xc80           syz-executor
 25241  381029   3528     0  2           0  0x4000000           syz-executor
 25241  198807   3528     0  3           0  0x4000080 fsleep    syz-executor
 25241   65961   3528     0  3           0  0x4000080 fsleep    syz-executor
 93827   67510  30835     0  2         0x2      0xc80           syz-executor
 21101  106341  30835     0  2         0x2          0           syz-executor
 95731   64056  30835     0  2         0x2          0           syz-executor
 73338  116568  30835     0  2         0x2          0           syz-executor
  3528  499175  30835     0  2         0x2      0xc80           syz-executor
 92072  223765  30835     0  2         0x2      0xc80           syz-executor
 79924  177323  30835     0  2         0x2          0           syz-executor
 36419  509045  30835     0  2         0x2      0xc80           syz-executor
 30835   39425      1     0  2         0x2       0x80           syz-executor
 70817  368250      1     0  3  0x10000002       0x88 kqread    sshd
 16588  228760  30946    74  3   0x1100012       0x80 bpf       pflogd
 30946  441157      1     0  3           0       0x80 sbwait    pflogd
 60941  223684  95579    73  3   0x1100010       0x80 kqread    syslogd
 95579  105829      1     0  3    0x100002       0x80 sbwait    syslogd
 81317   97804      1     0  3    0x100000       0x80 kqread    resolvd
 33282   17921  92270    77  3    0x100012       0x80 kqread    dhcpleased
 49092  130951  92270    77  3    0x100012       0x80 kqread    dhcpleased
 92270  275988      1     0  3           0       0x80 kqread    dhcpleased
 14933  316383      0     0  3     0x14000      0x200 bored     smr
 34859  157153      0     0  2     0x14000      0x200           zerothread
 34142   31800      0     0  3     0x14000      0x200 aiodoned  aiodoned
 75358  225311      0     0  3     0x14000      0x200 syncer    update
 10846  435030      0     0  3     0x14000      0x200 cleaner   cleaner
 13324  287514      0     0  3     0x14000      0x200 reaper    reaper
 19090  353766      0     0  3     0x14000      0x200 pgdaemon  pagedaemon
 70930  338767      0     0  3     0x14000      0x200 bored     viomb
 36219  293454      0     0  3     0x14000 0x40000200 acpi0     acpi0
 93254  229374      0     0  3     0x14000 0x40000200           idle1
  2868  141928      0     0  3     0x14000      0x200 bored     softnet1
 30276  397662      0     0  2     0x14000      0x200           softnet0
 28032  373067      0     0  3     0x14000      0x200 bored     systqmp
 37352  462405      0     0  3     0x14000      0x200 bored     systq
 18074  354395      0     0  3     0x14000      0x200 tmoslp    softclockmp
 99982  382797      0     0  3     0x14000 0x40000200 tmoslp    softclock
  9432  298295      0     0  3     0x14000 0x40000200           idle0
     1  135238      0     0  3         0x2       0x80 wait      init
     0       0     -1     0  3  0x10010000      0x200 scheduler swapper
ddb{1}> show all locks
Process 25241 (syz-executor) thread 0xffff80003a7bd780 (381029)
exclusive rrwlock inode r = 0 (0xfffff8806cbf80c8)
#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  vn_write+0x18f sys/kern/vfs_vnops.c:411
#6  dofilewritev+0x2bd sys/kern/sys_generic.c:384
#7  sys_write+0xa2 sys/kern/sys_generic.c:300
#8  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#9  Xsyscall+0x128
Process 21101 (syz-executor) thread 0xffff800036ba34e0 (106341)
exclusive rrwlock inode r = 0 (0xfffff8806ee6e418)
#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  ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline]
#4  ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150
#5  ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232
#6  ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393
#7  ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
#8  VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
#9  domkdirat+0x179 sys/kern/vfs_syscalls.c:3063
#10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffff8806cbf8440)
#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  domkdirat+0x8b sys/kern/vfs_syscalls.c:3048
#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
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11099  12173K   12431K 166960K     12960        0
            pcb    17     13K      13K 166960K       156        0
         rtable   250     12K      13K 166960K       519        0
             pf    37     18K      25K 166960K       218        0
         ifaddr    45      8K       8K 166960K        75        0
        ifgroup    55      2K       2K 166960K       106        0
         sysctl     4      1K       9K 166960K        13        0
       counters    70     37K      37K 166960K       110        0
       ioctlops     0      0K       4K 166960K      1906        0
            iov     0      0K      16K 166960K        28        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1379     87K      87K 166960K      2081        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       5K 166960K        14        0
         VM map     2      1K       1K 166960K         2        0
            sem    12      0K       1K 166960K        90        0
        dirhash    12      2K       2K 166960K        24        0
           ACPI  1734    201K     291K 166960K     11964        0
      file desc    16     57K     240K 166960K       888        0
          sigio     0      0K       0K 166960K         5        0
           proc    64     99K     180K 166960K       681        0
        subproc    72      4K       4K 166960K        90        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     1      0K       0K 166960K       191        0
       in_multi   102      7K       7K 166960K       141        0
    ether_multi     1      0K       0K 166960K         1        0
            mrt     0      0K       0K 166960K        19        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys   271   1208K    1208K 166960K       271        0
           exec     0      0K       1K 166960K       492        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   225    144K     174K 166960K      9612        0
       UVM aobj    89      3K       3K 166960K        92        0
     pinsyscall    34     68K     103K 166960K      2109        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K        32        0
            NDP    12      0K       2K 166960K        48        0
           temp    78   9128K   12983K 166960K     45319        0
         kqueue    11     16K      27K 166960K       138        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       76    0       73     1     0     1     1     0     8    0
rtentry    176      154    0       47     6     0     6     6     0     8    0
unpcb      144      779    0      765     8     2     6     6     0     8    5
syncache   336        6    0        6     1     0     1     1     0     8    1
tcpcb      736      147    0      144     1     0     1     1     0     8    0
arp        136       24    0        5     1     0     1     1     0     8    0
inpcb      328      739    0      730     6     0     6     6     0     8    4
nd6        152       37    0        9     2     0     2     2     0     8    0
pkpcb       40        3    0        3     1     0     1     1     0     8    1
kcovpl      48       10    0        2     1     0     1     1     0     8    0
mppekey    1024       1    0        1     1     0     1     1     0     8    1
ppxss      1192      12    0       12     1     0     1     1     0     8    1
pppxif     1576       3    0        3     1     0     1     1     0     8    1
pfstscr     40        6    0        4     1     0     1     1     0     8    0
pffrag     232        6    0        0     1     0     1     1     0   482    0
pffrnode    88        6    0        0     1     0     1     1     0     8    0
pffrent     40        7    0        1     1     0     1     1     0     8    0
pfosfp      40     1429    0     1005     5     0     5     5     0     8    0
pfosfpen   112     1429    0      714    21     0    21    21     0     8    0
pfrktable  1344       2    0        1     1     0     1     1     0     8    0
pfsrclim   320       66    0       66     1     0     1     1     0     8    1
pfstlim    224        1    0        0     1     0     1     1     0     8    0
pfanchor   1288      11    0        4     1     0     1     1     0     8    0
pftag       88        3    0        0     1     0     1     1     0     8    0
pfstitem    24       65    0        7     1     0     1     1     0     8    0
pfstkey    128       69    0        9     2     0     2     2     0     8    0
pfstate    448       65    0        8     7     0     7     7     0     8    0
pfrule     1360      42    0       35     2     0     2     2     0     8    0
rttmr      136        1    0        1     1     1     0     1     0     8    0
art_heap8  4096       2    0        0     2     0     2     2     0     8    0
art_heap4  256      701    0      229    31     1    30    31     0     8    0
art_table   40      703    0      229     5     0     5     5     0     8    0
art_node    32      154    0       59     1     0     1     1     0     8    0
sysvmsgpl   40        6    0        6     1     0     1     1     0     8    1
semapl      72       80    0       70     1     0     1     1     0     8    0
shmpl      112       89    0        3     3     0     3     3     0     8    0
dirhash    1024      25    0        8     3     0     3     3     0     8    0
dino2pl    256     2881    0     1414    93     0    93    93     0     8    0
ffsino     296     2881    0     1414   114     0   114   114     0     8    0
nchpl      144     4070    0     2356    64     0    64    64     0     8    0
rtmask      32        1    0        1     1     0     1     1     0     8    1
vnodes     216     3445    0        0   192     0   192   192     0     8    0
namei      1024   13718    0    13717     2     1     1     2     0     8    0
percpumem   16       71    0       20     1     0     1     1     0     8    0
kstatmem   264       57    0       30     2     0     2     2     0     8    0
scsiplug    72        3    0        3     1     0     1     1     0     8    1
scxspl     216    14546    0    14546    11     8     3     8     1     8    3
plimitpl   152      108    0       93     1     0     1     1     0     8    0
sigapl     424     1210    0     1166     8     0     8     8     0     8    2
knotepl    120      520    0        0    16     0    16    16     0     8    0
kqueuepl   224      281    0      274     3     1     2     3     0     8    1
pipepl     344      205    0      178     3     0     3     3     0     8    0
fdescpl    528     1174    0     1148     3     0     3     3     0     8    0
filepl     160     6838    0     6630    18     0    18    18     0     8    6
lockfpl    104      444    0      442     2     0     2     2     0     8    1
lockfspl    48      143    0      141     1     0     1     1     0     8    0
sessionpl  144       55    0       47     1     0     1     1     0     8    0
pgrppl      48       67    0       51     1     0     1     1     0     8    0
ucredpl    104      979    0      966     1     0     1     1     0     8    0
zombiepl   144     1170    0     1166     1     0     1     1     0     8    0
processpl  1232    1210    0     1166     6     0     6     6     0     8    1
procpl     664     2409    0     2358     8     0     8     8     0     8    0
sosppl     176        2    0        2     1     0     1     1     0     8    1
sockpl     752     1621    0     1595    19     8    11    17     0     8    7
mcl64k     65536      5    0        0     1     0     1     1     0     8    0
mcl16k     16384      1    0        0     1     0     1     1     0     8    0
mcl9k128   9344       1    0        0     1     0     1     1     0     8    0
mcl8k      8192      61    0        0     8     0     8     8     0     8    0
mcl4k      4096     143    0        0    18     0    18    18     0     8    0
mcl2k2     2112       1    0        0     1     0     1     1     0     8    0
mcl2k      2048      32    0        0     4     0     4     4     0     8    0
mextrefs    64       30    0        0     1     0     1     1     0     8    0
mtagpl      96        5    0        0     1     0     1     1     0     8    0
mbufpl     256      258    0        0    16     0    16    16     0     8    0
bufpl      272     6735    0      604   409     0   409   409     0     8    0
anonpl      32     8249    0        0    67     0    67    67     0   247    0
amapchunkpl 152   35976    0    35222    35     2    33    34     0   158    2
amappl16   200     2275    0     2241    19     7    12    15     0     8    8
amappl15   192        6    0        6     2     2     0     1     0     8    0
amappl14   184      459    0      459     1     0     1     1     0     8    1
amappl13   176      133    0      124     1     0     1     1     0     8    0
amappl12   168     1438    0     1412     2     0     2     2     0     8    0
amappl11   160        4    0        3     1     0     1     1     0     8    0
amappl10   152       62    0       48     1     0     1     1     0     8    0
amappl9    144      274    0      274     1     1     0     1     0     8    0
amappl8    136      110    0      107     1     0     1     1     0     8    0
amappl7    128      154    0      143     1     0     1     1     0     8    0
amappl6    120      187    0      186     1     0     1     1     0     8    0
amappl5    112      108    0       99     1     0     1     1     0     8    0
amappl4    104      324    0      304     1     0     1     1     0     8    0
amappl3     96     6280    0     6169     4     0     4     4     0     8    0
amappl2     88      582    0      529     2     0     2     2     0     8    0
amappl1     80    13841    0    13426    16     2    14    15     0     8    3
amappl      88     8706    0     8543     5     0     5     5     0    92    1
uvmvnodes   80      120    0        0     3     0     3     3     0     8    0
dma4096    4096       2    0        2     2     2     0     1     0     8    0
dma1024    1024       1    0        0     1     0     1     1     0     8    0
dma512     512        1    0        1     1     0     1     1     0     8    1
dma256     256        6    0        6     1     1     0     1     0     8    0
dma128     128      255    0      255     2     1     1     1     0     8    1
dma64       64        7    0        7     2     2     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       91    0        3     2     0     2     2     0     8    0
uaddrrnd    24     1174    0     1147     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     1174    0     1147     1     0     1     1     0     8    0
vmmpekpl   168    11522    0    11486     3     0     3     3     0     8    0
vmmpepl    168    80343    0    78765    99     1    98    98     0   357   20
vmsppl     488     1173    0     1147     6     1     5     5     0     8    1
rwobjpl     80    23064    0    22066    29     0    29    29     0     8    3
pdppl      4096    2355    0     2294   103    40    63    85     0     8    2
pvpl        32    26912    0        0   219     1   218   218     0   265    0
pmappl     256     1173    0     1147     3     0     3     3     0     8    0
extentpl    40       46    0       28     1     0     1     1     0     8    0
phpool     112      711    0       45    20     0    20    20     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
x86_ipi_db(ffffffff8399aff0) 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
end of kernel
end trace frame: 0x72cf60b537a0, count: 12
ddb{0}> trace
x86_ipi_db(ffffffff8399aff0) 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
end of kernel
end trace frame: 0x72cf60b537a0, count: -3
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834b75fb) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff834fac73,ffffffff834eae39,4b7,ffffffff8344d35f) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffff88008f1d4a8) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffff8806cc99d78,5b052c6b000,5b052c6c000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffff8806cc99d78,fffff8806f28a8d8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_map_teardown(fffff8806cc99d78) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffff8806cc99d78) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497
exit1(ffff80003a7c0d30,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260
sys_exit(ffff80003a7c0d30,ffff800031f95aa0,ffff800031f959f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800031f95aa0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800031f95aa0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a6f91c47ee0, count: 4
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff834b75fb) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff834fac73,ffffffff834eae39,4b7,ffffffff8344d35f) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pageunwire(fffff88008f1d4a8) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206
uvm_fault_unwire_locked(fffff8806cc99d78,5b052c6b000,5b052c6c000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790
uvm_unmap_kill_entry_withlock(fffff8806cc99d78,fffff8806f28a8d8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866
uvm_map_teardown(fffff8806cc99d78) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline]
uvm_map_teardown(fffff8806cc99d78) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497
exit1(ffff80003a7c0d30,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260
sys_exit(ffff80003a7c0d30,ffff800031f95aa0,ffff800031f959f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff800031f95aa0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff800031f95aa0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7a6f91c47ee0, count: -11
ddb{1}>