login: panic: receive 1a: so 0xfffffd805e504190, so_type 3, m 0xfffffd805a5a6e00, m_type 0
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*230402  34112      0           0          0    0  dhclient
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823caf25) at panic+0x15c sys/kern/subr_prf.c:207
soreceive(fffffd805e504190,0,ffff80001d6e5c28,0,0,ffff80001d6e5b34) at soreceive+0x170a sys/kern/uipc_socket.c:983
soo_read(fffffd805eab85a0,ffff80001d6e5c28,0) at soo_read+0x53 sys/kern/sys_socket.c:70
dofilereadv(ffff80001d6a99c8,6,ffff80001d6e5c28,0,ffff80001d6e5d10) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff80001d6a99c8,ffff80001d6e5cc0,ffff80001d6e5d10) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff80001d6e5d90) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe19a0, count: 7
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> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
receive 1a: so 0xfffffd805e504190, so_type 3, m 0xfffffd805a5a6e00, m_type 0
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823caf25) at panic+0x15c sys/kern/subr_prf.c:207
soreceive(fffffd805e504190,0,ffff80001d6e5c28,0,0,ffff80001d6e5b34) at soreceive+0x170a sys/kern/uipc_socket.c:983
soo_read(fffffd805eab85a0,ffff80001d6e5c28,0) at soo_read+0x53 sys/kern/sys_socket.c:70
dofilereadv(ffff80001d6a99c8,6,ffff80001d6e5c28,0,ffff80001d6e5d10) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff80001d6a99c8,ffff80001d6e5cc0,ffff80001d6e5d10) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff80001d6e5d90) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe19a0, count: -8
ddb> show registers
rdi                                0
rsi                              0x1
rbp               0xffff80001d6e5970
rbx               0xffff80001d6e5a20
rdx                              0x2
rcx                                0
rax                              0x1
r8                0xffffffff8140a10f    kprintf+0x15f
r9                               0x1
r10                              0x2
r11               0x1309f22efd13ce57
r12                     0x3000000008
r13               0xffff80001d6e5980
r14                            0x100
r15                              0x1
rip               0xffffffff814764a8    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff80001d6e5960
ss                              0x10
db_enter+0x18:  addq    $0x8,%rsp
ddb> show proc
PROC (dhclient) pid=230402 stat=onproc
    flags process=0 proc=0
    pri=24, usrpri=50, nice=20
    forw=0xffffffffffffffff, list=0xffff80001d6aa388,0xffff80001d6a9c48
    process=0xffff80001d6c4750 user=0xffff80001d6e0000, vmspace=0xfffffd806bc0a220
    estcpu=0, cpticks=0, pctcpu=0.0
    user=0, sys=0, intr=0
ddb> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 14797  102033  23004      0  3        0x82  thrsleep      syz-execprog
 14797   48592  23004      0  3   0x4000082  thrsleep      syz-execprog
 14797   63268  23004      0  3   0x4000082  thrsleep      syz-execprog
 14797  108107  23004      0  3   0x4000082  thrsleep      syz-execprog
 14797  363395  23004      0  3   0x4000082  wait          syz-execprog
 14797   89469  23004      0  3   0x4000082  kqread        syz-execprog
 14797  154112  23004      0  3   0x4000082  thrsleep      syz-execprog
 23004  216626  40563      0  3    0x10008a  pause         ksh
 40563  242402  45189      0  3        0x92  select        sshd
 40779  495162      1      0  3    0x100083  ttyin         getty
 45189   72178      1      0  3        0x80  select        sshd
 82162   45394  66336     73  3    0x100090  kqread        syslogd
 66336  276640      1      0  3    0x100082  netio         syslogd
 49633  322512      1     77  2    0x100010                dhclient
*34112  230402      1      0  7           0                dhclient
 21823  227541      0      0  3     0x14200  bored         smr
 14922   65246      0      0  3     0x14200  pgzero        zerothread
 82362   26464      0      0  3     0x14200  aiodoned      aiodoned
 44173  278369      0      0  3     0x14200  syncer        update
 32046  276246      0      0  3     0x14200  cleaner       cleaner
 98704  357001      0      0  3     0x14200  reaper        reaper
 45353  286047      0      0  3     0x14200  pgdaemon      pagedaemon
 72331  405045      0      0  3     0x14200  bored         crynlk
 79005  422749      0      0  3     0x14200  bored         crypto
 19550  369239      0      0  3  0x40014200  acpi0         acpi0
 32012  485921      0      0  2     0x14200                softnet
 19300  499635      0      0  2     0x14200                systqmp
 22675  371272      0      0  3     0x14200  bored         systq
 89447   22499      0      0  3  0x40014200  bored         softclock
 43812  451135      0      0  3  0x40014200                idle0
     1  407108      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb> show all locks
No such command
ddb> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf  9442   6320K    6320K  78643K     10543        0
            pcb    13      8K       8K  78643K        13        0
         rtable    61      1K       2K  78643K       155        0
         ifaddr    24      7K       9K  78643K        33        0
       counters    19     16K      16K  78643K        20        0
       ioctlops     0      0K       2K  78643K        14        0
          mount     1      1K       1K  78643K         1        0
         vnodes  1182     74K      74K  78643K      1187        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      0K       0K  78643K         2        0
            sem     2      0K       0K  78643K         2        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1809    195K     288K  78643K     12938        0
      file desc     2      4K      12K  78643K        18        0
           proc    47     38K      54K  78643K       318        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
       in_multi    11      0K       1K  78643K        22        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       1K  78643K       171        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     11K      12K  78643K       866        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     3      0K       0K  78643K         6        0
           temp    18   3845K    3909K  78643K      1629        0
         kqueue     3      4K       4K  78643K         3        0
      SYN cache     2     16K      16K  78643K         2        0
ddb> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp         64        4    0        2     1     0     1     1     0     8    0
rtpcb       80       17    0       15     1     0     1     1     0     8    0
rtentry    112       34    0       12     1     0     1     1     0     8    0
unpcb      120       27    0       19     1     0     1     1     0     8    0
syncache   264        5    0        5     2     1     1     1     0     8    1
tcpcb      544        8    0        5     1     0     1     1     0     8    0
inpcb      296       27    0       21     1     0     1     1     0     8    0
nd6         48        3    0        3     1     0     1     1     0     8    1
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      145    0        0    10     0    10    10     0     8    0
art_table   32      146    0        0     2     0     2     2     0     8    0
art_node    16       33    0        3     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1415    0       22    88     0    88    88     0     8    0
ffsino     240     1415    0       22    82     0    82    82     0     8    0
nchpl      144     1634    0       39    60     0    60    60     0     8    0
uvmvnodes   72     1424    0        0    26     0    26    26     0     8    0
vnodes     208     1424    0        0    75     0    75    75     0     8    0
namei      1024    3941    0     3941     2     1     1     1     0     8    1
scxspl     192     4454    0     4454     1     0     1     1     0     8    1
plimitpl   152       14    0        8     1     0     1     1     0     8    0
sigapl     424      212    0      186     4     0     4     4     0     8    0
knotepl    112       47    0       38     1     0     1     1     0     8    0
kqueuepl   144        2    0        0     1     0     1     1     0     8    0
pipepl     272       70    0       64     2     1     1     1     0     8    0
fdescpl    432      198    0      186     2     0     2     2     0     8    0
filepl     120      980    0      929     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       57    0       50     1     0     1     1     0     8    0
zombiepl   144      187    0      186     2     1     1     1     0     8    0
processpl  928      212    0      186     4     0     4     4     0     8    0
procpl     624      218    0      186     3     0     3     3     0     8    0
sockpl     400       71    0       55     2     0     2     2     0     8    0
mcl4k      4096      10    0       10     2     1     1     1     0     8    1
mcl2k      2048    5559    0     5524     8     3     5     8     0     8    0
mtagpl      96        2    0        2     1     1     0     1     0     8    0
mbufpl     256     9684    0     9601     8     1     7     7     0     8    0
bufpl      280     2961    0      125   203     0   203   203     0     8    0
anonpl      16    22409    0    20923    14     2    12    12     0   107    4
amapchunkpl 152     873    0      813     5     1     4     4     0   158    1
amappl16   192      120    0       93     2     0     2     2     0     8    0
amappl15   184        1    0        0     1     0     1     1     0     8    0
amappl14   176       35    0       30     1     0     1     1     0     8    0
amappl13   168       20    0       18     2     1     1     1     0     8    0
amappl12   160       12    0        9     2     1     1     1     0     8    0
amappl11   152       46    0       36     1     0     1     1     0     8    0
amappl10   144       11    0        8     1     0     1     1     0     8    0
amappl9    136      211    0      209     1     0     1     1     0     8    0
amappl8    128      232    0      226     1     0     1     1     0     8    0
amappl7    120      103    0       91     1     0     1     1     0     8    0
amappl6    112       22    0       20     2     1     1     1     0     8    0
amappl5    104      156    0      147     1     0     1     1     0     8    0
amappl4     96      428    0      405     1     0     1     1     0     8    0
amappl3     88      107    0      101     1     0     1     1     0     8    0
amappl2     80      810    0      757     3     1     2     2     0     8    0
amappl1     72    13561    0    13167    24     7    17    17     0     8    8
amappl      80      446    0      421     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        2    0        0     1     0     1     1     0     8    0
uaddrrnd    24      198    0      186     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      198    0      186     1     0     1     1     0     8    0
vmmpekpl   168     6070    0     6048     2     0     2     2     0     8    0
vmmpepl    168    29531    0    28680    82    13    69    69     0   357   30
vmsppl     272      197    0      186     1     0     1     1     0     8    0
pdppl      4096     402    0      372     5     0     5     5     0     8    0
pvpl        32   106789    0   103076   108     6   102   102     0   265   70
pmappl     200      197    0      186     1     0     1     1     0     8    0
extentpl    40       53    0       36     1     0     1     1     0     8    0
phpool     112      220    0        9     7     0     7     7     0     8    0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823caf25) at panic+0x15c sys/kern/subr_prf.c:207
soreceive(fffffd805e504190,0,ffff80001d6e5c28,0,0,ffff80001d6e5b34) at soreceive+0x170a sys/kern/uipc_socket.c:983
soo_read(fffffd805eab85a0,ffff80001d6e5c28,0) at soo_read+0x53 sys/kern/sys_socket.c:70
dofilereadv(ffff80001d6a99c8,6,ffff80001d6e5c28,0,ffff80001d6e5d10) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff80001d6a99c8,ffff80001d6e5cc0,ffff80001d6e5d10) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff80001d6e5d90) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe19a0, count: -8
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823caf25) at panic+0x15c sys/kern/subr_prf.c:207
soreceive(fffffd805e504190,0,ffff80001d6e5c28,0,0,ffff80001d6e5b34) at soreceive+0x170a sys/kern/uipc_socket.c:983
soo_read(fffffd805eab85a0,ffff80001d6e5c28,0) at soo_read+0x53 sys/kern/sys_socket.c:70
dofilereadv(ffff80001d6a99c8,6,ffff80001d6e5c28,0,ffff80001d6e5d10) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237
sys_read(ffff80001d6a99c8,ffff80001d6e5cc0,ffff80001d6e5d10) at sys_read+0x83 sys/kern/sys_generic.c:157
syscall(ffff80001d6e5d90) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe19a0, count: -8
ddb>