syzbot


panic: lock (sleep mutex) sctp-tcb not locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:LINE (3)

Status: auto-closed as invalid on 2022/02/22 23:07
Reported-by: syzbot+063c750fcfa45c0a26e0@syzkaller.appspotmail.com
First crash: 877d, last: 877d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
freebsd panic: lock (sleep mutex) sctp-tcb not locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:LINE (2) 2 1025d 1026d 0/2 auto-closed as invalid on 2021/09/27 05:56
freebsd panic: lock (sleep mutex) sctp-tcb not locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:LINE 1 1175d 1175d 0/2 auto-closed as invalid on 2021/04/30 19:43

Sample crash report:
panic: lock (sleep mutex) sctp-tcb not locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:1580
cpuid = 0
time = 1637795177
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe0056b45930
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe0056b45a90
vpanic() at vpanic+0x2b8/frame 0xfffffe0056b45b70
panic() at panic+0xb5/frame 0xfffffe0056b45c30
witness_unlock() at witness_unlock+0x511/frame 0xfffffe0056b45cb0
__mtx_unlock_flags() at __mtx_unlock_flags+0xeb/frame 0xfffffe0056b45d70
sctp_iterator_worker() at sctp_iterator_worker+0xbfd/frame 0xfffffe0056b45ed0
sctp_iterator_thread() at sctp_iterator_thread+0x5e/frame 0xfffffe0056b45ef0
fork_exit() at fork_exit+0xd0/frame 0xfffffe0056b45f30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056b45f30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 5 tid 100069 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x26f50ea(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                           0
rax                       0x12
rcx         0x386d9412d247ad33
rdx                        0x1
rbx                          0
rsp         0xfffffe0056b45a70
rbp         0xfffffe0056b45a90
rsi                          0
rdi         0xffffffff8179a41a  vprintf+0x35a
r8                           0
r9                  0xffffffff
r10                          0
r11                       0xbf
r12         0xfffffe00572f6740
r13         0xfffffe0056b45a01
r14         0xffffffff82b8be40  .str.18
r15         0xffffffff82b8be40  .str.18
rip         0xffffffff8178dc2b  kdb_enter+0x6b
rflags                    0x46
kdb_enter+0x6b: movq    $0,0x26f50ea(%rip)
db> show proc
Process 5 (sctp_iterator) at 0xfffffe00578d2a90:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff83e26520
 ABI: null
 flag: 0x10000204  flag2: 0
 reaper: 0xffffffff83e26520 reapsubtree: 5
 sigparent: 20
 vmspace: 0xffffffff83e274c0
   (map 0xffffffff83e274c0)
   (map.pmap 0xffffffff83e27580)
   (pmap 0xffffffff83e275e8)
 threads: 1
100069                   Run     CPU 0                       [sctp_iterator]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
23135   788   788     0  R       (threaded)                  syz-executor.2
126041                   RunQ                                syz-executor.2
126899                   RunQ                                syz-executor.2
23134   778   778     0  R       (threaded)                  syz-executor.0
123263                   Run     CPU 1                       syz-executor.0
126897                   RunQ                                syz-executor.0
23133   789   789     0  R       (threaded)                  syz-executor.3
115460                   RunQ                                syz-executor.3
126898                   S       uwait   0xfffffe009ef08300  syz-executor.3
23132   779   779     0  R       (threaded)                  syz-executor.1
115450                   RunQ                                syz-executor.1
126896                   S       uwait   0xfffffe00576f2580  syz-executor.1
126900                   S       uwait   0xfffffe00a7a9b280  syz-executor.1
20325     1   789     0  S       uwait   0xfffffe00a7a9cc00  syz-executor.3
20323     1   789     0  S       uwait   0xfffffe00576f2380  syz-executor.3
17529     1   779     0  SV      uwait   0xfffffe009ef08580  syz-executor.1
17523     1   779     0  SV      sigwait 0xfffffe00a778d0b0  syz-executor.1
12208     1   778     0  S       uwait   0xfffffe00a777f700  syz-executor.0
12206     1   778     0  S       uwait   0xfffffe005718cb00  syz-executor.0
12109     1   778     0  S       uwait   0xfffffe00a777f500  syz-executor.0
12103     1   788     0  S       uwait   0xfffffe00a7a9d880  syz-executor.2
12100     1   788     0  S       uwait   0xfffffe009ef0a480  syz-executor.2
 8603     1  8603    65  Ss      select  0xfffffe00a777eec0  dhclient
 7440     1  7440     0  Ss      select  0xfffffe00079896c0  dhclient
 7437     1  7437     0  Ss      select  0xfffffe00a7a9cb40  dhclient
 7418     1  7418    65  Ss      select  0xfffffe00576f6d40  dhclient
 6028     1  6028     0  Ss      select  0xfffffe00a7a9d640  dhclient
 6025     1  6025     0  Ss      select  0xfffffe00a7a9c0c0  dhclient
 6006     1  6006    65  Ss      select  0xfffffe00a7a9c140  dhclient
 4201     1  4201     0  Ss      select  0xfffffe00a7a9d340  dhclient
 4198     1  4198     0  Ss      select  0xfffffe00a7a9d140  dhclient
 4177     1  4177    65  Ss      select  0xfffffe00a7a9ce40  dhclient
 1738     1   788     0  SV      uwait   0xfffffe00576f3200  syz-executor.2
 1730     1   788     0  SV      uwait   0xfffffe009ef09d80  syz-executor.2
 1722     1   788     0  SV      uwait   0xfffffe0057189180  syz-executor.2
 1714     1   788     0  SV      uwait   0xfffffe00576f3400  syz-executor.2
 1708     1   788     0  SV      uwait   0xfffffe0007989b00  syz-executor.2
 1696     1   788     0  SV      uwait   0xfffffe009ef0ad00  syz-executor.2
 1690     1   778     0  SV      uwait   0xfffffe009ef09880  syz-executor.0
 1684     1   788     0  SV      uwait   0xfffffe009ef08800  syz-executor.2
 1680     1   778     0  SV      uwait   0xfffffe009ef09180  syz-executor.0
 1673     1   788     0  SV      uwait   0xfffffe009ef09e80  syz-executor.2
 1669     1   778     0  SV      uwait   0xfffffe009ef0b080  syz-executor.0
 1663     1   788     0  SV      uwait   0xfffffe009ef09680  syz-executor.2
 1659     1   778     0  SV      uwait   0xfffffe009ef0ae00  syz-executor.0
 1653     1   788     0  SV      uwait   0xfffffe009ef0ac00  syz-executor.2
 1649     1   778     0  SV      uwait   0xfffffe009ef0b280  syz-executor.0
 1643     1   788     0  SV      uwait   0xfffffe009ef09980  syz-executor.2
 1639     1   778     0  SV      uwait   0xfffffe009ef0a000  syz-executor.0
 1633     1   788     0  SV      uwait   0xfffffe00576f3100  syz-executor.2
 1629     1   778     0  SV      uwait   0xfffffe00576f2e80  syz-executor.0
 1623     1   788     0  SV      uwait   0xfffffe00576f3300  syz-executor.2
 1619     1   778     0  SV      uwait   0xfffffe009ef09b80  syz-executor.0
 1611     1   778     0  SV      uwait   0xfffffe009ef0a780  syz-executor.0
 1608     1   778     0  SV      uwait   0xfffffe009ef0a100  syz-executor.0
 1598     1   778     0  SV      uwait   0xfffffe009ef0b180  syz-executor.0
 1588     1   778     0  SV      uwait   0xfffffe00576f3580  syz-executor.0
 1579     1   778     0  SV      uwait   0xfffffe005718a700  syz-executor.0
 1569     1   778     0  SV      uwait   0xfffffe005718a500  syz-executor.0
 1560     1   778     0  SV      uwait   0xfffffe005718c080  syz-executor.0
 1549     1   778     0  SV      uwait   0xfffffe0007989900  syz-executor.0
 1545     1  1545     0  Ss      select  0xfffffe00576f2cc0  dhclient
 1542     1  1542     0  Ss      select  0xfffffe009ef0a6c0  dhclient
 1520     1   778     0  SV      uwait   0xfffffe0057189e80  syz-executor.0
 1497     1   778     0  SV      uwait   0xfffffe009ef09a80  syz-executor.0
 1483     1   778     0  SV      uwait   0xfffffe0007989a00  syz-executor.0
 1475     1   778     0  SV      uwait   0xfffffe009ef0ab00  syz-executor.0
 1462     1   778     0  SV      uwait   0xfffffe009ef09780  syz-executor.0
 1446     1   778     0  SV      uwait   0xfffffe009ef0af00  syz-executor.0
 1157     1   789     0  S       uwait   0xfffffe009ef0a200  syz-executor.3
 1156     1   789     0  S       uwait   0xfffffe009ef09c80  syz-executor.3
 1070  1069   789     0  SV      uwait   0xfffffe0057189080  syz-executor.3
 1069     1   789     0  DV      ppwait  0xfffffe009e792a40  syz-executor.3
  935     0     0     0  DL      -       0xffffffff83f700c0  [soaiod4]
  934     0     0     0  DL      -       0xffffffff83f700c0  [soaiod3]
  933     0     0     0  DL      -       0xffffffff83f700c0  [soaiod2]
  932     0     0     0  DL      -       0xffffffff83f700c0  [soaiod1]
  867     0     0     0  DL      aiordy  0xfffffe0058b42a90  [aiod4]
  866     0     0     0  DL      aiordy  0xfffffe0058a13000  [aiod3]
  865     0     0     0  DL      aiordy  0xfffffe009ee81000  [aiod2]
  863     0     0     0  DL      aiordy  0xfffffe009e792a90  [aiod1]
  789   775   789     0  Rs                                  syz-executor.3
  788   775   788     0  Rs                                  syz-executor.2
  779   775   779     0  Rs                                  syz-executor.1
  778   775   778     0  Rs                                  syz-executor.0
  775   773   773     0  S       (threaded)                  syz-fuzzer
100111                   S       uwait   0xfffffe00576f4a00  syz-fuzzer
100113                   S       uwait   0xfffffe005718a100  syz-fuzzer
100114                   S       uwait   0xfffffe005718a200  syz-fuzzer
100115                   S       uwait   0xfffffe005718a300  syz-fuzzer
100116                   S       uwait   0xfffffe005718b000  syz-fuzzer
100117                   S       uwait   0xfffffe0007989c00  syz-fuzzer
100118                   S       uwait   0xfffffe0007989d00  syz-fuzzer
100119                   S       uwait   0xfffffe005718a400  syz-fuzzer
100121                   S       uwait   0xfffffe0007989e00  syz-fuzzer
104505                   S       kqread  0xfffffe00081f7e00  syz-fuzzer
  773   771   773     0  Ss      pause   0xfffffe009e7945f8  csh
  771   687   771     0  Ss      select  0xfffffe00571893c0  sshd
  754     1   754     0  Ss+     ttyin   0xfffffe00572e3cb0  getty
  753     1   753     0  Ss+     ttyin   0xfffffe00584750b0  getty
  752     1   752     0  Ss+     ttyin   0xfffffe00584754b0  getty
  751     1   751     0  Ss+     ttyin   0xfffffe00584758b0  getty
  750     1   750     0  Ss+     ttyin   0xfffffe0058475cb0  getty
  749     1   749     0  Ss+     ttyin   0xfffffe00584770b0  getty
  748     1   748     0  Ss+     ttyin   0xfffffe00584774b0  getty
  747     1   747     0  Ss+     ttyin   0xfffffe00584778b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe0058477cb0  getty
  691     1   691     0  Ss      nanslp  0xffffffff83e503c1  cron
  687     1   687     0  Ss      select  0xfffffe00576f3b40  sshd
  500     1   500     0  Ss      select  0xfffffe0057189bc0  syslogd
  429     1   429     0  Ss      select  0xfffffe00576f3c40  devd
  428     1   428    65  Ss      select  0xfffffe00576f3cc0  dhclient
  343     1   343     0  Ss      select  0xfffffe0057189ac0  dhclient
  340     1   340     0  Ss      select  0xfffffe00576f3bc0  dhclient
   16     0     0     0  DL      vlruwt  0xfffffe0053de9a90  [vnlru]
   15     0     0     0  DL      syncer  0xffffffff83f75bc0  [syncer]
    9     0     0     0  DL      (threaded)                  [bufdaemon]
100078                   D       qsleep  0xffffffff83f741e0  [bufdaemon]
100081                   D       -       0xffffffff83211f80  [bufspacedaemon-0]
100094                   D       sdflush 0xfffffe0056e520e8  [/ worker]
    8     0     0     0  DL      psleep  0xffffffff83fa7680  [vmdaemon]
    7     0     0     0  DL      (threaded)                  [pagedaemon]
100076                   D       psleep  0xffffffff83f9b538  [dom0]
100082                   D       launds  0xffffffff83f9b544  [laundry: dom0]
100083                   D       umarcl  0xffffffff81e7eac0  [uma]
    6     0     0     0  DL      -       0xffffffff83c0c2c8  [rand_harvestq]
    5     0     0     0  RL      CPU 0                       [sctp_iterator]
    4     0     0     0  DL      pftm    0xffffffff8477e320  [pf purge]
    3     0     0     0  DL      (threaded)                  [cam]
100045                   D       -       0xffffffff83a97040  [doneq0]
100046                   D       -       0xffffffff83a96fc0  [async]
100075                   D       -       0xffffffff83a96e40  [scanner]
   14     0     0     0  DL      seqstat 0xfffffe0056ce0888  [sequencer 00]
    2     0     0     0  DL      (threaded)                  [crypto]
100041                   D       crypto_ 0xffffffff83f96d80  [crypto]
100042                   D       crypto_ 0xfffffe0053c97630  [crypto returns 0]
100043                   D       crypto_ 0xfffffe0053c97680  [crypto returns 1]
   13     0     0     0  DL      (threaded)                  [geom]
100036                   D       -       0xffffffff83e25ac0  [g_event]
100037                   D       -       0xffffffff83e25ae0  [g_up]
100038                   D       -       0xffffffff83e25b00  [g_down]
   12     0     0     0  LL      (threaded)                  [intr]
100011                   I                                   [swi6: task queue]
100014                   I                                   [swi6: Giant taskq]
100018                   I                                   [swi5: fast taskq]
100029                   I                                   [swi3: vm]
100030                   L      *sctp-in 0xfffffe00078849c0  [swi1: netisr 0]
100031                   I                                   [swi4: clock (0)]
100032                   I                                   [swi4: clock (1)]
100033                   I                                   [swi1: hpts]
100034                   I                                   [swi1: hpts]
100047                   I                                   [irq24: virtio_pci0]
100048                   I                                   [irq25: virtio_pci0]
100049                   I                                   [irq26: virtio_pci0]
100050                   I                                   [irq27: virtio_pci0]
100051                   I                                   [irq28: virtio_pci1]
100052                   I                                   [irq29: virtio_pci1]
100053                   I                                   [irq30: virtio_pci1]
100054                   I                                   [irq31: virtio_pci1]
100055                   I                                   [irq32: virtio_pci1]
100060                   I                                   [irq10: virtio_pci2]
100062                   I                                   [irq1: atkbd0]
100063                   I                                   [irq12: psm0]
100064                   I                                   [swi0: uart uart++]
100068                   I                                   [swi1: pf send]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffffe0053de9000  [init]
   10     0     0     0  DL      audit_w 0xffffffff83f97860  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff83e26520  [swapper]
100005                   D       -       0xfffffe0053c98700  [if_config_tqg_0]
100006                   D       -       0xfffffe0053c98600  [softirq_0]
100007                   D       -       0xfffffe0053c98500  [softirq_1]
100008                   D       -       0xfffffe0053c98400  [if_io_tqg_0]
100009                   D       -       0xfffffe0053c98300  [if_io_tqg_1]
100010                   D       -       0xfffffe0053c9e600  [pci_hp taskq]
100012                   D       -       0xfffffe0053c9e200  [inm_free taskq]
100013                   D       -       0xfffffe0053c9e000  [in6m_free taskq]
100015                   D       -       0xfffffe0053c9db00  [aiod_kick taskq]
100016                   D       -       0xfffffe0053c9d900  [deferred_unmount ta]
100017                   D       -       0xfffffe0053c9d700  [thread taskq]
100019                   D       -       0xfffffe0053c9d300  [linuxkpi_irq_wq]
100020                   D       -       0xfffffe0053c9d100  [kqueue_ctx taskq]
100021                   D       -       0xfffffe0053c9ce00  [linuxkpi_short_wq_0]
100022                   D       -       0xfffffe0053c9ce00  [linuxkpi_short_wq_1]
100023                   D       -       0xfffffe0053c9ce00  [linuxkpi_short_wq_2]
100024                   D       -       0xfffffe0053c9ce00  [linuxkpi_short_wq_3]
100025                   D       -       0xfffffe0053c9c900  [linuxkpi_long_wq_0]
100026                   D       -       0xfffffe0053c9c900  [linuxkpi_long_wq_1]
100027                   D       -       0xfffffe0053c9c900  [linuxkpi_long_wq_2]
100028                   D       -       0xfffffe0053c9c900  [linuxkpi_long_wq_3]
100035                   D       -       0xfffffe0053c9bc00  [firmware taskq]
100039                   D       -       0xfffffe0053c9b700  [crypto_0]
100040                   D       -       0xfffffe0053c9b700  [crypto_1]
100056                   D       -       0xfffffe0053c9fa00  [vtnet0 rxq 0]
100057                   D       -       0xfffffe0053c9f900  [vtnet0 txq 0]
100058                   D       -       0xfffffe0053c9f800  [vtnet0 rxq 1]
100059                   D       -       0xfffffe0053c9f700  [vtnet0 txq 1]
100061                   D       vtbslp  0xfffffe00571b9a00  [virtio_balloon]
100065                   D       -       0xfffffe00572b8b00  [mca taskq]
100066                   D       -       0xffffffff82b91921  [deadlkres]
100070                   D       -       0xfffffe00576fa000  [acpi_task_0]
100071                   D       -       0xfffffe00576fa000  [acpi_task_1]
100072                   D       -       0xfffffe00576fa000  [acpi_task_2]
100074                   D       -       0xfffffe0056df7300  [CAM taskq]
22415     1   788     0  Z                                   syz-executor.2
22416     1   788     0  Z                                   syz-executor.2
db> show all locks
Process 5 (sctp_iterator) thread 0xfffffe00572f6740 (100069)
exclusive sleep mutex sctp-inp (inp) r = 0 (0xfffffe00a40abe50) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:1463
exclusive sleep mutex sctp-it (iterator) r = 0 (0xffffffff84b5c140) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:1460
shared rw sctp-info (sctp-info) r = 0 (0xfffffe0053c44460) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:1459
Process 12 (intr) thread 0xfffffe0053ea6c80 (100030)
shared rw sctp-info (sctp-info) r = 0 (0xfffffe0053c44460) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_pcb.c:2125
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4213         4323K         4241
          tcp_hpts            6         3201K            6
         sysctloid        34994         2061K        35065
             vtbuf           24         1968K           46
          inodedep         2494         1447K        22295
              kobj          328         1312K          487
            newblk           39         1034K        24202
          vfscache            3         1025K            3
          filedesc          114          906K        44235
               pcb          106          625K        36743
            dirrem         2484          621K        22186
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
           subproc          244          505K        23267
              intr            4          472K            4
          freefile         2484          311K        22139
              vmem            3          274K            5
            acpica         1674          184K        55623
         vnet_data            1          168K            1
           tidhash            3          141K            3
            linker          353          134K          381
           pagedep           10          131K        22080
        tfo_ccache            1          128K            1
            DEVFS1          109          109K          126
               sem            4          106K            4
               BPF           46           88K           67
               bus          990           81K         3486
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
            module          512           64K          512
       ddb_capture            1           64K            1
              umtx          484           61K          484
           kdtrace          325           60K        50037
               shm            4           38K          346
              temp           34           33K         6311
            DEVFS3          128           32K          138
         hostcache            1           32K            1
               msg            4           30K            4
        gtaskqueue           18           26K           18
         sctp_atcl           61           23K        16134
            kbdmux            6           22K            6
            ifaddr           71           21K           73
         sctp_timw           80           20K           80
        DEVFS_RULE           56           20K           56
         sctp_stro           19           19K         3668
         ufs_mount            4           17K            5
              proc            3           17K            3
               tty           16           16K           16
          routetbl          137           16K          429
           ithread           99           16K           99
           lltable           46           15K          253
            bus-sc           34           15K         1693
       ether_multi          157           13K          167
            KTRACE          100           13K          100
             ifnet            7           13K            7
              kenv           95           12K           95
      eventhandler          136           12K          136
         CAM queue            5           11K         1528
              GEOM           61           10K          490
              rman           84           10K          425
            kqueue          116           10K        23146
         in6_multi           71            9K           71
         bmsafemap            2            9K        22313
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K          213
               rpc            2            8K            2
             shmfd            1            8K           33
       pfs_vncache            1            8K            1
         pfs_nodes           20            8K           20
     audit_evclass          237            8K          295
           pwddesc          112            7K        23136
         taskqueue           63            7K           63
              cred           26            7K         2639
            sglist            5            7K            5
           CAM DEV            3            6K          510
            plimit           24            6K          530
            DEVFSP           82            6K         4056
          pf_ifnet           12            5K          108
       ufs_dirhash           24            5K           24
           session           35            5K           58
               UMA          268            5K          268
         proc-args          140            5K        24561
                vt           11            5K           11
          freework           17            5K        22685
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
          kcovinfo           64            4K           68
           acpisem           28            4K           28
             selfd           55            4K       305580
             lockf           32            4K           66
             hhook           15            4K           17
         sctp_atky           80            4K        20927
          terminal           11            3K           11
            select           19            3K          140
           uidinfo            3            3K           14
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           15
          sctp_ifa           14            2K           15
            Unitno           29            2K           47
           CAM XPT           22            2K          543
         sctp_stri            3            2K         2232
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
               msi            9            2K            9
             clone            9            2K            9
               tun            7            2K            7
           softdep            1            1K            1
             mkdir            8            1K        44118
          freeblks            4            1K        22120
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           92
      NFSD session            1            1K            1
         sctp_athm           61            1K        17250
        CAM periph            4            1K          271
          sctp_ifn            6            1K           15
             ipsec            3            1K            3
               mld            6            1K            6
              igmp            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           89
          pci_link           10            1K           10
       inpcbpolicy           22            1K        30444
            CC Mem           11            1K        29431
           tcp_fsb            5            1K         8548
         newdirblk            5            1K        22059
            crypto            4            1K          336
 encap_export_host           12            1K           12
          procdesc            5            1K           18
          sctp_map           38            1K         7330
            diradd            4            1K        22228
              pfil            4            1K            4
               osd           15            1K        28858
              cdev            2            1K            2
    chacha20random            1            1K            1
         sctp_iter            1            1K           17
         sctp_cpal            1            1K            5
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
          indirdep            1            1K          950
             xform            4            1K         4569
        ip_msource            4            1K            5
            vnodes            1            1K            1
           CAM SIM            2            1K            2
            feeder            7            1K            7
           tcpfunc            3            1K            3
        loginclass            3            1K            6
            prison            6            1K            6
       lkpikmalloc            5            1K            6
        aesni_data            2            1K            2
          nexusdev            8            1K            8
            apmdev            1            1K            1
          atkbddev            2            1K            2
     CAM dev queue            2            1K            2
 CAM I/O Scheduler            1            1K            1
          CAM path            4            1K         1034
          pmchooks            1            1K            1
            soname            4            1K        52702
          filecaps            5            1K          120
          sctp_vrf            1            1K            1
              vnet            1            1K            1
           entropy            2            1K           49
          acpiintr            1            1K            1
               pmc            1            1K            1
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          p1003.1b            1            1K            1
        sctp_mcore            0            0K            0
        sctp_socko            0            0K         5183
         sctp_mvrf            0            0K            0
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
         sctp_athi            0            0K            0
         sctp_a_it            0            0K           12
         sctp_aadr            0            0K            0
           filemon            0            0K           62
          pf_table            0            0K            0
           pf_rule            0            0K            0
           pf_altq            0            0K            0
           pf_osfp            0            0K            0
           pf_temp            0            0K            0
            mqdata            0            0K            0
            tcp_do            0            0K            0
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        madt_table            0            0K            2
          smartpqi            0            0K            0
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      NFSCL diroff            0            0K            0
       NEWdirectio            0            0K            0
        NEWNFSnode            0            0K            0
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      NFSCL client            0            0K            0
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              iavf            0            0K            0
               ixl            0            0K            0
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            NFS fh            0            0K            0
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             axgbe            0            0K            0
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      NFSD V4state            0            0K            0
     NFSD srvcache            0            0K            0
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            DEVFS4            0            0K            0
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            DEVFS2            0            0K            0
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            gntdev            0            0K            0
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        evtchn_dev            0            0K            0
              isci            0            0K            0
      iommu_dmamap            0            0K            0
          xenstore            0            0K            0
     hyperv_socket            0            0K            0
           bxe_ilt            0            0K            0
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            xenbus            0            0K            0
         BACKLIGHT            0            0K            0
               xnb            0            0K            0
              xbbd            0            0K            0
     vm_fictitious            0            0K            0
               xbd            0            0K            0
           Balloon            0            0K            0
          sysmouse            0            0K            0
            vtfont            0            0K            0
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            athdev            0            0K            0
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           UMAHash            0            0K            0
               amr            0            0K            0
            pvscsi            0            0K            0
         vm_pgdata            0            0K            0
           jblocks            0            0K            0
          savedino            0            0K        16663
          sentinel            0            0K            0
            jfsync            0            0K            0
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             sbdep            0            0K           44
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            USBdev            0            0K            0
               USB            0            0K            0
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        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
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        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
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            MLX5EN            0            0K            0
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        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
          MLX5DUMP            0            0K            0
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        MLX5EEPROM            0            0K            0
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         ipsec-reg            0            0K            0
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      ipsecrequest            0            0K            0
            ip6opt            0            0K           64
       ip6_msource            0            0K            0
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       in6_mfilter            0            0K            0
             frag6            0            0K            0
            tcplog            0            0K            0
        tcp_hwpace            0            0K            0
           acpipwr            0            0K            0
               LRO            0            0K            0
       ip_moptions            0            0K            2
        in_mfilter            0            0K           12
              ipid            0            0K            0
         80211scan            0            0K            0
      80211ratectl            0            0K            0
        80211power            0            0K            0
       80211nodeie            0            0K            0
         80211node            0            0K            0
      80211mesh_gt            0            0K            0
      80211mesh_rt            0            0K            0
         80211perr            0            0K            0
         80211prep            0            0K            0
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          80211dfs            0            0K            0
       80211crypto            0            0K            0
          80211vap            0            0K            0
             iflib            0            0K            0
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               gif            0            0K            0
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              zlib            0            0K            0
           fadvise            0            0K            0
           VN POLL            0            0K            0
         acpi_perf            0            0K            0
            statfs            0            0K        23090
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       export_host            0            0K            0
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            twsbuf            0            0K            0
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       tcp_log_dev            0            0K         2726
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             hdacc            0            0K            0
              hdac            0            0K            0
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               PUC            0            0K            0
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            biobuf            0            0K            0
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               lio            0            0K           22
               acl            0            0K            0
agtiapi_MemAlloc malloc            0            0K            0
          mbuf_tag            0            0K          274
              ktls            0            0K            0
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          tempbuff            0            0K            0
ag_tgt_map_t malloc            0            0K            0
ag_slr_map_t malloc            0            0K            0
lDevFlags * malloc            0            0K            0
tiDeviceHandle_t * malloc            0            0K            0
ag_portal_data_t malloc            0            0K            0
ag_device_t malloc            0            0K            0
     STLock malloc            0            0K            0
          CCB List            0            0K            0
            sr_iov            0            0K            0
               OCS            0            0K            0
               OCS            0            0K            0
              nvme            0            0K            0
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            mwldev            0            0K            0
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              accf            0            0K            0
               pts            0            0K            0
               iov            0            0K        30777
          ioctlops            0            0K         1322
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             stack            0            0K            0
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               mps            0            0K            0
          mpr_user            0            0K            0
            MPRSAS            0            0K            0
               mpr            0            0K            0
            mfibuf            0            0K            0
              sbuf            0            0K          288
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          firmware            0            0K            0
        compressor            0            0K            0
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               LED            0            0K            0
         sysctltmp            0            0K          981
            sysctl            0            0K            3
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       aacraid_buf            0            0K            0
                ix            0            0K            0
            ipsbuf            0            0K            0
             cache            0            0K            0
            iirbuf            0            0K            0
      prison_racct            0            0K            0
       Fail Points            0            0K            0
             sigio            0            0K            1
filedesc_to_leader            0            0K            0
               pwd            0            0K            0
       tty console            0            0K            0
            aaccam            0            0K            0
            aacbuf            0            0K            0
              zstd            0            0K            0
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           SCSI sa            0            0K            0
         scsi_pass            0            0K            0
        isofs_node            0            0K            0
       isofs_mount            0            0K            0
     tr_raid5_data            0            0K            0
    tr_raid1e_data            0            0K            0
     tr_raid1_data            0            0K            0
     tr_raid0_data            0            0K            0
    tr_concat_data            0            0K            0
       md_sii_data            0            0K            0
   md_promise_data            0            0K            0
    md_nvidia_data            0            0K            0
   md_jmicron_data            0            0K            0
     md_intel_data            0            0K            0
       md_ddf_data            0            0K            0
         raid_data            0            0K           72
     geom_flashmap            0            0K            0
         tmpfs dir            0            0K            0
        tmpfs name            0            0K            0
       tmpfs mount            0            0K            0
           NFS FHA            0            0K            0
         newnfsmnt            0            0K            0
  newnfsclient_req            0            0K            0
   NFSCL layrecall            0            0K            0
     NFSCL session            0            0K            0
     NFSCL sockreq            0            0K            0
     NFSCL devinfo            0            0K            0
db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8320    1078      872712       0     254   38494208        0
           tcp_log    416       0   10422      175308       0     254    4335552        0
              pbuf   2624       0     989           0       0       2    2595136        0
              mbuf    256    8884     779     8515328       0     254    2473728        0
        RADIX NODE    144   12305     178      520989       0      62    1797552        0
          BUF TRIE    144     192   11596        2449       0      62    1697472        0
        malloc-384    384    4207      23        4208       0      30    1624320        0
      mbuf_cluster   2048     762       0         762       0     254    1560576        0
        malloc-128    128   11805     316       12162       0     126    1551488        0
       malloc-4096   4096     340       2         510       0       2    1400832        0
       UMA Slabs 0    112   11042       4       11042       0     126    1237152        0
         sctp_asoc   2288      19     491        3665       0     254    1166880        0
         vmem btag     56   20491      68       20491       0     254    1151304        0
      malloc-16384  16384      58       5       22117       0       2    1032192        0
        malloc-384    384    2493      27       22294       0      30     967680        0
         VM OBJECT    264    2964     156      346394       0      30     823680        0
         FFS inode   1160     561      27       22700       0       8     682080        0
        malloc-256    256    2534      76       33550       0      62     668160        0
        256 Bucket   2048     297      25       30679       0       8     659456        0
           sctp_ep   1272      39     471       11353       0     254     648720        0
       tcp_bbr_map    128       0    4805     1736878       0     127     615040        0
             tcpcb   1096      11     500       28847       0     254     560056        0
         MAP ENTRY     96    5322     348     1326318       0     126     544320        0
    ertt_txseginfo     40       1   13230     6240146       0     254     529240        0
       malloc-4096   4096     116       4       23803       0       2     491520        0
            socket    960      70     438       43203       0     254     487680        0
        malloc-256    256     195    1545       17559       0      62     445440        0
            THREAD   1808     210      32       26900       0       8     437536        0
            lkpimm    168       1    2327           1       0      62     391104        0
          lkpicurr    168       2    2326           2       0      62     391104        0
         tcp_inpcb    496      12     756       28847       0     254     380928        0
        sctp_raddr    736      19     498        3686       0     254     380512        0
        malloc-128    128    2619     171       23909       0     126     357120        0
             VNODE    448     602      91       22743       0      30     310464        0
         malloc-64     64    4391     460       27625       0     254     310464        0
      malloc-65536  65536       4       0           4       0       1     262144        0
      malloc-65536  65536       2       2           6       0       1     262144        0
     udplite_inpcb    496       0     512         140       0     254     253952        0
         udp_inpcb    496       6     506         905       0     254     253952        0
           VMSPACE   2552      86      10       23077       0       4     244992        0
         malloc-16     16   14652     348       15937       0     254     240000        0
            DEVCTL   1024       0     220         155       0       0     225280        0
     FPU_save_area    832     212      49       29104       0      16     217152        0
      malloc-65536  65536       0       3         382       0       1     196608        0
      malloc-65536  65536       3       0           3       0       1     196608        0
      malloc-32768  32768       0       6         893       0       1     196608        0
       mbuf_packet    256      37     725       41687       0     254     195072        0
         UMA Zones    768     240       4         240       0      16     187392        0
         malloc-32     32    5353     317        6118       0     254     181440        0
        malloc-128    128    1054     341       53885       0     126     178560        0
        malloc-128    128    1131     264       25893       0     126     178560        0
       FFS2 dinode    256     561     129       22700       0      62     176640        0
        malloc-256    256      96     594       27227       0      62     176640        0
              PROC   1352     113      16       23135       0       8     174408        0
       S VFS Cache    104    1066     455       24057       0     126     158184        0
        128 Bucket   1024      66      81        5435       0      16     150528        0
       malloc-1024   1024     121      23         149       0      16     147456        0
         filedesc0   1072     112      21       23136       0       8     142576        0
      malloc-65536  65536       0       2         144       0       1     131072        0
       malloc-2048   2048      40      24       11354       0       8     131072        0
             unpcb    256      20     490        1357       0     254     130560        0
             ripcb    496       5     251         552       0     254     126976        0
       malloc-4096   4096      27       3          31       0       2     122880        0
          ksiginfo    112     120     924        2599       0     126     116928        0
        malloc-256    256     305     130       50756       0      62     111360        0
         64 Bucket    512     118      82       16524       0      30     102400        0
      malloc-32768  32768       1       2         131       0       1      98304        0
       malloc-2048   2048       4      44        2118       0       8      98304        0
          UMA Kegs    384     226       7         226       0      30      89472        0
             g_bio    408       0     210       22077       0      30      85680        0
        sctp_readq    152       2     518         818       0     254      79040        0
        sctp_chunk    152      22     498        2014       0     254      79040        0
       malloc-8192   8192       5       4          67       0       1      73728        0
      tcp_rack_pcb    896       5      76        8548       0      16      72576        0
        malloc-384    384     151      29         532       0      30      69120        0
         malloc-64     64     646     425       53815       0     254      68544        0
       malloc-2048   2048       8      24         534       0       8      65536        0
       malloc-1024   1024      25      39        3671       0      16      65536        0
        malloc-256    256      58     197       47993       0      62      65280        0
         32 Bucket    256      72     183        6038       0      62      65280        0
sctp_stream_msg_out    112       1     539         875       0     254      60480        0
        malloc-384    384      84      66       16364       0      30      57600        0
       malloc-8192   8192       5       2         106       0       1      57344        0
         malloc-64     64     337     482       23663       0     254      52416        0
         malloc-64     64     278     541       24349       0     254      52416        0
         malloc-64     64      81     738      311536       0     254      52416        0
             Files     80     270     380       82653       0     126      52000        0
        malloc-128    128     107     296       22331       0     126      51584        0
        malloc-128    128     202     201         638       0     126      51584        0
        malloc-256    256     108      87         506       0      62      49920        0
        malloc-256    256      87     108         806       0      62      49920        0
        malloc-256    256      10     185       22082       0      62      49920        0
           DIRHASH   1024      34      14          34       0      16      49152        0
             NAMEI   1024       0      48      113993       0      16      49152        0
      malloc-16384  16384       3       0           3       0       1      49152        0
       malloc-8192   8192       3       3          31       0       1      49152        0
       malloc-8192   8192       5       1           7       0       1      49152        0
       malloc-2048   2048      13      11          18       0       8      49152        0
       malloc-1024   1024       4      44        4238       0      16      49152        0
        malloc-512    512       3      93        2232       0      30      49152        0
              pipe    744      23      42         788       0      16      48360        0
       tcp_bbr_pcb    832       0      54        6825       0      16      44928        0
          syncache    168       0     264           4       0     254      44352        0
         TURNSTILE    136     243      72         243       0      62      42840        0
            clpbuf   2624       0      16          20       0      16      41984        0
            pcpu-8      8    4749     371        6444       0     254      40960        0
            da_ccb    544       0      70        5630       0      16      38080        0
               PWD     32      64    1070       22162       0     254      36288        0
         malloc-64     64     110     457        4433       0     254      36288        0
         malloc-64     64       7     560       13930       0     254      36288        0
         malloc-64     64      61     506          61       0     254      36288        0
        malloc-128    128      35     244       22434       0     126      35712        0
        malloc-128    128      41     238        5997       0     126      35712        0
     routing nhops    256      27     108          35       0      62      34560        0
           ttyoutq    256      72      63         160       0      62      34560        0
        SLEEPQUEUE     88     243     141         243       0     126      33792        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-16384  16384       2       0          17       0       1      32768        0
      malloc-16384  16384       0       2         160       0       1      32768        0
       malloc-8192   8192       0       4           8       0       1      32768        0
       malloc-4096   4096       4       4          14       0       2      32768        0
       malloc-4096   4096       4       4           8       0       2      32768        0
       malloc-2048   2048       2      14          14       0       8      32768        0
       malloc-2048   2048       2      14           2       0       8      32768        0
       malloc-2048   2048       3      13         194       0       8      32768        0
       malloc-1024   1024       3      29          43       0      16      32768        0
       malloc-1024   1024       7      25         194       0      16      32768        0
       malloc-1024   1024      14      18          14       0      16      32768        0
       malloc-1024   1024      16      16          18       0      16      32768        0
        malloc-512    512       1      63         119       0      30      32768        0
        malloc-512    512      11      53          32       0      30      32768        0
        malloc-512    512       8      56           8       0      30      32768        0
        malloc-512    512       2      62          92       0      30      32768        0
           pcpu-64     64     482      30         482       0     254      32768        0
             KNOTE    160      28     172      234355       0      62      32000        0
            ttyinq    160     135      65         300       0      62      32000        0
      tcp_rack_map    120       9     255       13095       0     126      31680        0
            cpuset    104       7     272           7       0     126      29016        0
        sctp_laddr     48       3     585        6081       0     254      28224        0
              ertt     72      11     381       28847       0     126      28224        0
         malloc-32     32     404     478       21458       0     254      28224        0
         16 Bucket    144      82     114         610       0      62      28224        0
          4 Bucket     48       5     583         503       0     254      28224        0
               AIO    208       2     131        1549       0      62      27664        0
             AIOCB    552       3      46        2168       0      16      27048        0
       malloc-8192   8192       3       0           3       0       1      24576        0
       malloc-4096   4096       1       5       23091       0       2      24576        0
           rtentry    176      31     107          35       0      62      24288        0
              PGRP     88      35     241          60       0     126      24288        0
          rl_entry     40      87     519          87       0     254      24240        0
          8 Bucket     80      51     249        5457       0     126      24000        0
        malloc-384    384       3      57          45       0      30      23040        0
        malloc-384    384      24      36         107       0      30      23040        0
tfo_ccache_entries     80       4     252           4       0     126      20480        0
         hostcache     64       1     314           1       0     254      20160        0
             udpcb     32       6     624        1045       0     254      20160        0
              AIOP     32       4     626           4       0     254      20160        0
         malloc-32     32      53     577       30834       0     254      20160        0
         malloc-32     32     150     480        1946       0     254      20160        0
         malloc-32     32     120     510       37296       0     254      20160        0
         malloc-32     32      10     620          96       0     254      20160        0
         malloc-32     32      62     568          92       0     254      20160        0
         malloc-32     32      26     604        2999       0     254      20160        0
          2 Bucket     32      68     562        2609       0     254      20160        0
           cryptop    280       0      70          21       0      30      19600        0
       Mountpoints   2752       2       5           2       0       4      19264        0
            AIOLIO    272       0      70          11       0      30      19040        0
 epoch_record pcpu    256       4      60           4       0      62      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-2048   2048       5       3           5       0       8      16384        0
       malloc-1024   1024       1      15           1       0      16      16384        0
        malloc-512    512       0      32          28       0      30      16384        0
        malloc-512    512       4      28         174       0      30      16384        0
           SMR CPU     32       3     508           3       0     254      16352        0
      vtnet_tx_hdr     24       0     668     6253795       0     254      16032        0
         malloc-16     16     117     883       58217       0     254      16000        0
              kenv    258      15      45        1046       0      30      15480        0
            mqnode    416       3      33           3       0      30      14976        0
              vmem   1856       1       7           1       0       8      14848        0
        SMR SHARED     24       3     508           3       0     254      12264        0
         malloc-16     16      99     651       24207       0     254      12000        0
         malloc-16     16      54     696       36637       0     254      12000        0
         malloc-16     16      44     706         544       0     254      12000        0
         malloc-16     16      15     735          15       0     254      12000        0
         malloc-16     16     276     474         278       0     254      12000        0
         malloc-16     16      24     726       25320       0     254      12000        0
            itimer    352       0      33           2       0      30      11616        0
        malloc-384    384       3      27           3       0      30      11520        0
       malloc-4096   4096       1       1           3       0       2       8192        0
           pcpu-16     16       7     249           7       0     254       4096        0
       UMA Slabs 1    176       9      13           9       0      62       3872        0
        KMAP ENTRY     96      12      27          14       0       0       3744        0
       FFS1 dinode    128       0       0           0       0     126          0        0
           ada_ccb    272       0       0           0       0      30          0        0
             swblk    136       0       0           0       0      62          0        0
          swpctrie    144       0       0           0       0      62          0        0
   sctp_asconf_ack     48       0       0           0       0     254          0        0
       sctp_asconf     40       0       0           0       0     254          0        0
   cdg_qdiffsample     16       0       0           0       0     254          0        0
   pf state scrubs     40       0       0           0       0     254          0        0
   pf frag entries     40       0       0           0       0     254          0        0
          pf frags    248       0       0           0       0      62          0        0
  pf table entries    160       0       0           0       0      62          0        0
pf table entry counters     64       0       0           0       0     254          0        0
   pf source nodes    136       0       0           0       0     254          0        0
     pf state keys     88       0       0           0       0     126          0        0
         pf states    312       0       0           0       0     254          0        0
           pf tags    104       0       0           0       0     126          0        0
          pf mtags     48       0       0           0       0     254          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
      tcp_log_node    120       0       0           0       0     126          0        0
    tcp_log_bucket    176       0       0           0       0      62          0        0
          tcpreass     48       0       0           0       0     254          0        0
               tfo      4       0       0           0       0     254          0        0
          sackhole     32       0       0           0       0     254          0        0
             tcptw     88       0       0           0       0     254          0        0
               ipq     56       0       0           0       0     254          0        0
        TMPFS node    224       0       0           0       0      62          0        0
        mqnotifier    216       0       0           0       0      62          0        0
            mvdata     64       0       0           0       0     254          0        0
            mqueue    248       0       0           0       0      62          0        0
           NCLNODE    608       0       0           0       0      16          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
       L VFS Cache    320       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
  linux_dma_object     32       0       0           0       0     254          0        0
  linux_dma_pctrie    144       0       0           0       0      62          0        0
   IOMMU_MAP_ENTRY    120       0       0           0       0     126          0        0
    mbuf_jumbo_16k  16384       0       0           0       0     254          0        0
     mbuf_jumbo_9k   9216       0       0           0       0     254          0        0
      audit_record   1280       0       0           0       0       8          0        0
         domainset     40       0       0           0       0     254          0        0
        MAC labels     40       0       0           0       0     254          0        0
            vnpbuf   2624       0       0           0       0      64          0        0
            mdpbuf   2624       0       0           0       0       3          0        0
           nfspbuf   2624       0       0           0       0      16          0        0
            swwbuf   2624       0       0           0       0       8          0        0
            swrbuf   2624       0       0           0       0      16          0        0
          umtx_shm     88       0       0           0       0     126          0        0
           umtx pi     96       0       0           0       0     126          0        0
rangeset pctrie nodes    144       0       0           0       0      62          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
       malloc-4096   4096       0       0           0       0       2          0        0
        malloc-512    512       0       0           0       0      30          0        0
        malloc-384    384       0       0           0       0      30          0        0
           pcpu-32     32       0       0           0       0     254          0        0
            pcpu-4      4       0       0           0       0     254          0        0
            fakepg    104       0       0           0       0     126          0        0
          UMA Hash    256       0       0           0       0      62          0        0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/11/24 23:06 freebsd-src d47d3a94bb2d 545ab074 console log report ci-freebsd-i386 panic: lock (sleep mutex) sctp-tcb not locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:LINE
* Struck through repros no longer work on HEAD.