syzbot

kernel: protection fault trap, code=0
Stopped at      mtx_enter+0x6e: movq    0(%r14),%r15
ddb> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
the kernel did not panic
ddb> trace
mtx_enter(deadbeefdeadbfcf) at mtx_enter+0x6e sys/kern/kern_lock.c:549
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff80002a72c530) at reaper+0x2bc sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -3
ddb> show registers
rdi                                0
rsi                                0
rbp               0xffff80002a7638c0
rbx                          0x40000    acpi_pdirpa+0x2be71
rdx                                0
rcx               0xffffffff83854ff0    cpu_info_full_primary+0x1ff0
rax               0xffff80002a72c500
r8                0xffffffffffffffff
r9                                 0
r10               0x75329099f0cbd45a
r11               0xd2901cf892bf8dcf
r12               0xdeadbeefdeadbeef
r13                          0x40000    acpi_pdirpa+0x2be71
r14               0xdeadbeefdeadbfcf
r15                                0
rip               0xffffffff8122946e    mtx_enter+0x6e
cs                               0x8
rflags                       0x10297    __ALIGN_SIZE+0xf297
rsp               0xffff80002a763890
ss                              0x10
mtx_enter+0x6e: movq    0(%r14),%r15
ddb> show proc
PROC (reaper) tid=284537 pid=96946 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=0xffff80002a72c298,0xffff80002a72d768
    process=0xffff8000ffffe880 user=0xffff80002a75e000, vmspace=0xffffffff83946de0
    estcpu=0, cpticks=88, pctcpu=0.3, user=0, sys=0, intr=0
ddb> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 29669  406967      0      0  3     0x14280  nfsidl        nfsio
  7271  309764  17520      0  2           0                syz-executor
 20988  502284  94510      0  2           0                syz-executor
 20988  350390  94510      0  3   0x4000080  fsleep        syz-executor
 14697  353996    448     -1  2        0x10                syz-executor
 14697  123913    448     -1  3   0x4000090  fsleep        syz-executor
 14697  129854    448     -1  3   0x4000090  fsleep        syz-executor
 68218  277204  28013      0  2           0                syz-executor
 68218   74285  28013      0  2   0x4000000                syz-executor
 68218  379187  28013      0  3   0x4000080  fsleep        syz-executor
 85099  414836      0      0  3     0x14200  acct          acct
 79276  317614      1      0  3    0x100083  ttyin         getty
 68280  358825      0      0  3     0x14280  nfsidl        nfsio
 69745    1956      0      0  3     0x14280  nfsidl        nfsio
 17938  103759      0      0  3     0x14280  nfsidl        nfsio
 69531  231920      0      0  3     0x14280  nfsidl        nfsio
 94510  110697  46046      0  3        0x82  nanoslp       syz-executor
 52248  269508  46046      0  2         0x2                syz-executor
 36406  357359  46046      0  3        0x82  nanoslp       syz-executor
   448  119867  46046      0  3        0x82  nanoslp       syz-executor
 17520  104239  46046      0  3        0x82  nanoslp       syz-executor
 74954  286272  46046      0  3        0x82  wait          syz-executor
 28013  214744  46046      0  3        0x82  nanoslp       syz-executor
 46046  249138  34646      0  3        0x82  nanoslp       syz-executor
 34646  204518  12244      0  3    0x10008a  sigsusp       ksh
 12244  502447  44763      0  3        0x98  kqread        sshd-session
 44763  149130  42830      0  3        0x92  kqread        sshd-session
 42830  421356      1      0  3        0x88  kqread        sshd
 64254  308807  65652     73  3   0x1100090  kqread        syslogd
 65652  132316      1      0  3    0x100082  sbwait        syslogd
 22138  454116      1      0  3    0x100080  kqread        resolvd
 30555  307541  14354     77  3    0x100092  kqread        dhcpleased
 24596  225775  14354     77  3    0x100092  kqread        dhcpleased
 14354  160009      1      0  3        0x80  kqread        dhcpleased
 52530  133274      0      0  3     0x14200  bored         smr
 86745   79650      0      0  2     0x14200                zerothread
 19444  429667      0      0  3     0x14200  aiodoned      aiodoned
 83718  338187      0      0  3     0x14200  syncer        update
 32142  128843      0      0  3     0x14200  cleaner       cleaner
*96946  284537      0      0  7     0x14200                reaper
 71785  513700      0      0  3     0x14200  pgdaemon      pagedaemon
 69593  348757      0      0  3     0x14200  bored         viomb
 30134  121489      0      0  3  0x40014200  acpi0         acpi0
 57019  436410      0      0  3     0x14200  bored         softnet0
 45498  485456      0      0  3     0x14200  bored         systqmp
  1155  286011      0      0  3     0x14200  bored         systq
 11253  404888      0      0  3  0x40014200  tmoslp        softclock
 30155  393484      0      0  3  0x40014200                idle0
     1  209705      0      0  3        0x82  wait          init
     0       0     -1      0  3  0x10010200  scheduler     swapper
ddb> show all locks
No such command
ddb> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11065  12104K   12430K 166960K     14287        0
            pcb    17     17K      19K 166960K       484        0
         rtable   181     11K      12K 166960K       842        0
             pf    33     13K      16K 166960K       195        0
         ifaddr    28      5K       7K 166960K       146        0
        ifgroup    46      2K       2K 166960K       271        0
         sysctl     4      1K       9K 166960K        22        0
       counters    32     17K      18K 166960K       140        0
       ioctlops     0      0K       8K 166960K       392        0
            iov     0      0K      32K 166960K       138        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1532     96K      97K 166960K      3282        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     3      5K       9K 166960K        34        0
         VM map     2      1K       1K 166960K         2        0
            sem    12      0K       0K 166960K        73        0
        dirhash    12      2K       2K 166960K        39        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    14     49K     228K 166960K      2079        0
          sigio     0      0K       0K 166960K        36        0
           proc    61     59K     124K 166960K       789        0
        subproc    63      3K       5K 166960K       243        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       213        0
       in_multi    47      3K       7K 166960K       202        0
    ether_multi     1      0K       0K 166960K        17        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   235   1049K    1049K 166960K       235        0
           exec     0      0K       1K 166960K       663        0
   fusefs mount     1     32K      32K 166960K         1        0
     pfkey data     0      0K       0K 166960K         1        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   216    143K     170K 166960K     21802        0
       UVM aobj    56     21K      23K 166960K        65        0
     pinsyscall    35     70K      96K 166960K      3256        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       1K 166960K       143        0
            NDP    10      0K       1K 166960K       100        0
           temp    76   8671K    8928K 166960K     83913        0
         kqueue    16     22K      34K 166960K       443        0
      SYN cache     2     16K      16K 166960K         2        0
ddb> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb      120      286    0      282     3     0     3     3     0     8    2
rtentry    136      198    0      144     4     0     4     4     0     8    0
unpcb      144     1255    0     1240     4     0     4     4     0     8    3
syncache   336       13    0       13     2     1     1     1     0     8    1
tcpqe       32        4    0        4     1     0     1     1     0     8    1
tcpcb      736      975    0      969    13     4     9    13     0     8    8
arp         96       30    0       22     1     0     1     1     0     8    0
ipq         40       10    0        9     1     0     1     1     0     8    0
ipqe        40       13    0       12     1     0     1     1     0     8    0
inpcb      328     2144    0     2135    13     4     9    13     0     8    8
ip6q        72       77    0       77     1     0     1     1     0     8    1
ip6af       40      149    0      149     1     0     1     1     0     8    1
nd6        112       45    0       30     1     0     1     1     0     8    0
pkpcb       40       14    0       14     2     1     1     1     0     8    1
kcovpl      48       27    0       20     1     0     1     1     0     8    0
mppekey    1024       2    0        2     1     0     1     1     0     8    1
ppxss      1072      74    0       74     1     0     1     1     0     8    1
pppxif     1384      14    0       14     1     0     1     1     0     8    1
pfstscr     40        2    0        2     1     0     1     1     0     8    1
pfrktable  1344       1    0        1     1     0     1     1     0     8    1
pfstitem    24        2    0        0     1     0     1     1     0     8    0
pfstkey    128        9    0        7     1     0     1     1     0     8    0
pfstate    384        5    0        4     1     0     1     1     0     8    0
art_heap8  4096       5    0        1     4     0     4     4     0     8    0
art_heap4  256      792    0      559    31     2    29    31     0     8    8
art_table   40      797    0      560     5     0     5     5     0     8    0
art_node    32      196    0      147     1     0     1     1     0     8    0
sysvmsgpl   40       14    0        9     1     0     1     1     0     8    0
semupl     112        1    0        1     1     0     1     1     0     8    1
semapl     112       70    0       60     1     0     1     1     0     8    0
shmpl      112       51    0        7     2     0     2     2     0     8    0
dirhash    1024      35    0       18     3     0     3     3     0     8    0
dino2pl    256     5310    0     3796    95     0    95    95     0     8    0
ffsino     256     5310    0     3796    95     0    95    95     0     8    0
nchpl      144     8221    0     7602    64    31    33    64     0     8    8
rtmask      32       21    0       21     1     0     1     1     0     8    1
vnodes     216     5926    0        0   330     0   330   330     0     8    0
namei      1024   29346    0    29346     4     2     2     2     0     8    2
vcpupl     3904       9    0        0     2     0     2     2     0     8    0
vmpool     808       11    0        2     1     0     1     1     0     8    0
kstatmem   264      156    0      136     3     0     3     3     0     8    1
scsiplug    72        8    0        8     1     0     1     1     0     8    1
scxspl     216    28960    0    28960     9     1     8     8     1     8    8
plimitpl   152      774    0      759     1     0     1     1     0     8    0
sigapl     424     2355    0     2309     9     1     8     8     0     8    2
knotepl    120   180381    0   180331    28    18    10    16     0     8    8
kqueuepl   184      914    0      904     4     0     4     4     0     8    3
pipepl     304      445    0      417     8     0     8     8     0     8    5
fdescpl    448     2311    0     2285     5     1     4     5     0     8    0
filepl     120    15989    0    15789    15     0    15    15     0     8    7
lockfpl    104      911    0      909     2     0     2     2     0     8    1
lockfspl    48      302    0      300     1     0     1     1     0     8    0
sessionpl  144       47    0       39     1     0     1     1     0     8    0
pgrppl      48       98    0       83     1     0     1     1     0     8    0
ucredpl    104     2443    0     2431     1     0     1     1     0     8    0
zombiepl   144     3968    0     3966     1     0     1     1     0     8    0
processpl  1152    2355    0     2309     5     0     5     5     0     8    1
procpl     664     6022    0     5969     7     0     7     7     0     8    1
sosppl     176       10    0       10     1     0     1     1     0     8    1
sockpl     552     3822    0     3794    12     2    10    12     0     8    7
mcl64k     65536    226    0      226     2     1     1     1     0     8    1
mcl16k     16384      9    0        9     1     0     1     1     0     8    1
mcl12k     12288      2    0        2     1     0     1     1     0     8    1
mcl9k      9216       2    0        2     1     0     1     1     0     8    1
mcl8k      8192      24    0       24     2     1     1     1     0     8    1
mcl4k      4096    5385    0     5338    12     4     8    10     0     8    1
mcl2k      2048    3267    0     3264     8     2     6     6     0     8    5
mtagpl      96       40    0       30     1     0     1     1     0     8    0
mbufpl     256    32797    0    32109   453   403    50   368     0     8    6
bufpl      280     8727    0     2506   445     0   445   445     0     8    0
anonpl      24   287511    0   281838    86    10    76    76     0   187   29
amapchunkpl 152   73637    0    73110    41     4    37    37     0   158   11
amappl16   200     3434    0     3338    24     7    17    24     0     8    8
amappl14   184        7    0        7     1     1     0     1     0     8    0
amappl13   176      439    0      438     1     0     1     1     0     8    0
amappl12   168     2701    0     2666     2     0     2     2     0     8    0
amappl11   160        1    0        0     1     0     1     1     0     8    0
amappl10   152       38    0       28     1     0     1     1     0     8    0
amappl9    144      245    0      245     1     1     0     1     0     8    0
amappl8    136       60    0       57     1     0     1     1     0     8    0
amappl7    128       87    0       85     1     0     1     1     0     8    0
amappl6    120      299    0      287     1     0     1     1     0     8    0
amappl5    112       89    0       80     1     0     1     1     0     8    0
amappl4    104      425    0      400     1     0     1     1     0     8    0
amappl3     96    12973    0    12899     3     0     3     3     0     8    0
amappl2     88     2472    0     2404     2     0     2     2     0     8    0
amappl1     80    18596    0    18072    14     1    13    13     0     8    0
amappl      88    20643    0    20495     5     0     5     5     0    92    0
uvmvnodes   80      169    0        0     4     0     4     4     0     8    0
dma65536   65536      1    0        1     1     0     1     1     0     8    1
dma8192    8192       2    0        2     1     0     1     1     0     8    1
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        7    0        7     2     1     1     1     0     8    1
dma128     128      255    0      255     2     1     1     1     0     8    1
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       64    0        9     2     0     2     2     0     8    1
uaddrrnd    24     2311    0     2285     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     2311    0     2285     1     0     1     1     0     8    0
vmmpekpl   168    21268    0    21228     3     0     3     3     0     8    0
vmmpepl    168   150988    0   149261    98     1    97    97     0   357   11
vmsppl     368     2310    0     2284     4     1     3     4     0     8    0
rwobjpl     40    38662    0    37559    16     1    15    15     0     8    0
pdppl      4096    4650    0     4581   153    80    73    82     0     8    4
pvpl        32   948394    0   936739   158    18   140   140     0   265   31
pmappl     216     2321    0     2286     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      895    0      504    20     0    20    20     0     8    6
ddb> machine ddbcpu 0
No such command
ddb> trace
mtx_enter(deadbeefdeadbfcf) at mtx_enter+0x6e sys/kern/kern_lock.c:549
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff80002a72c530) at reaper+0x2bc sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -3
ddb> machine ddbcpu 1
No such command
ddb> trace
mtx_enter(deadbeefdeadbfcf) at mtx_enter+0x6e sys/kern/kern_lock.c:549
prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff80002a72c530) at reaper+0x2bc sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -3