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panic: deadlkres: possible deadlock detected on allproc_lock

cpuid = 0
time = 1758444591
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056c2fab0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056c2fc10
vpanic() at vpanic+0x257/frame 0xfffffe0056c2fdd0
panic() at panic+0xb5/frame 0xfffffe0056c2fea0
deadlkres() at deadlkres+0x59a/frame 0xfffffe0056c2fef0
fork_exit() at fork_exit+0xcc/frame 0xfffffe0056c2ff30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056c2ff30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 0 tid 100065 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x259e0f7(%rip)
db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
      malloc-16384  16384    6350       2        6506       0       1  104071168        0
   mbuf_jumbo_page   4096    8323    1075       16145       0     254   38494208        0
       malloc-4096   4096    6399       1        7388       0       2   26214400        0
         MAP ENTRY     96  217209    1401      282751       0     126   20986560        0
            THREAD   1860    6941       3        7162       0       8   12915840        0
              PROC   1368    6828      54        8262       0       8    9414576        0
         filedesc0   1072    6394      11        7400       0       8    6866160        0
     FPU_save_area    832    6943      23        7285       0      16    5795712        0
           VMSPACE    584    6800      67        8237       0      16    4010328        0
         vmem btag     56   52878      81       52878       0     254    2965704        0
           tcp_log    416    3471    3648       26334       0     254    2961504        0
       UMA Slabs 0    112   24717       9       24717       0     126    2769312        0
         VM OBJECT    248   10740     124       25928       0      62    2694272        0
        malloc-384    384    6893      37        6893       0      30    2661120        0
              mbuf    256    8639    1023       28163       0     254    2473472        0
        RADIX NODE    152   13754     203       43792       0      62    2121464        0
        malloc-128    128   14274     110       17993       0     126    1841152        0
        malloc-256    256    6987      93        7259       0      62    1812480        0
          BUF TRIE    152     318   11486        1734       0      62    1794208        0
--More--                malloc-384    384    4143      27        4161       0      30    1601280        0
        malloc-128    128   11657      61       11672       0     126    1499904        0
       malloc-4096   4096     334       4         595       0       2    1384448        0
      malloc-65536  65536      15       1          19       0       1    1048576        0
         malloc-64     64     612   15705       33308       0     254    1044288        0
      mbuf_cluster   2048     508       0         508       0     254    1040384        0
         TURNSTILE    136    6945      69        6945       0      62     953904        0
          ksiginfo    112    6860     196        6940       0     126     790272        0
         FFS inode   1168     534      40         783       0       8     670432        0
        SLEEPQUEUE     88    6945     127        6945       0     126     622336        0
           sctp_ep   1152       3     508          44       0     254     588672        0
         sctp_asoc   2256       0     255           2       0     254     575280        0
         malloc-64     64    7853     337        9733       0     254     524160        0
            socket   1024      22     486        1741       0     254     520192        0
          lkpicurr    168       2    3094           2       0      62     520128        0
              pbuf   2624       0     198           0       0       2     519552        0
        256 Bucket   2048     227       5        2998       0       8     475136        0
         malloc-64     64    6838     281        8343       0     254     455616        0
         malloc-64     64    6545     322        7597       0     254     439488        0
             VNODE    440     572      58         824       0      30     277200        0
--More--                 malloc-64     64    3898     197        3915       0     254     262080        0
       malloc-2048   2048     110      10         402       0       8     245760        0
         malloc-16     16   14614     386       14689       0     254     240000        0
         malloc-32     32    6359     571        6682       0     254     221760        0
            DEVCTL   1024      22     194         146       0       0     221184        0
      malloc-32768  32768       0       6         182       0       1     196608        0
        sctp_raddr    736       0     264           2       0     254     194304        0
         UMA Zones    768     243       1         243       0      16     187392        0
         malloc-32     32    5365     305        5426       0     254     181440        0
        malloc-128    128    1210     185       25764       0     126     178560        0
    ertt_txseginfo     40       0    4343        6668       0     254     173720        0
            lkpimm     56       1    3095           1       0     254     173376        0
             unpcb    320       4     512        1201       0     254     165120        0
      malloc-32768  32768       3       2          17       0       1     163840        0
       FFS2 dinode    256     534      96         783       0      62     161280        0
        malloc-256    256      72     558        2235       0      62     161280        0
       malloc-2048   2048       7      65        1042       0       8     147456        0
       S VFS Cache    104    1028     376        1312       0     126     146016        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-65536  65536       0       2          56       0       1     131072        0
--More--              malloc-65536  65536       0       2         110       0       1     131072        0