syzbot


panic: sctp_timer_start of type 5: inp = ADDR, stcb->sctp_ep ADDR

Status: auto-closed as invalid on 2021/11/29 02:51
Reported-by: syzbot+33135c5178d8c1499e3c@syzkaller.appspotmail.com
First crash: 1020d, last: 967d

Sample crash report:
panic: sctp_timer_start of type 5: inp = 0xfffffe00a6e20ad0, stcb->sctp_ep 0xfffffe00a79b7500
cpuid = 0
time = 1628178260
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe00077f3390
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe00077f34f0
vpanic() at vpanic+0x2c5/frame 0xfffffe00077f35d0
panic() at panic+0xb5/frame 0xfffffe00077f36a0
sctp_timer_start() at sctp_timer_start+0x16e1/frame 0xfffffe00077f3710
sctp_timeout_handler() at sctp_timeout_handler+0x17d3/frame 0xfffffe00077f3850
softclock_call_cc() at softclock_call_cc+0x3d9/frame 0xfffffe00077f3a00
softclock() at softclock+0x152/frame 0xfffffe00077f3a50
ithread_loop() at ithread_loop+0x4f1/frame 0xfffffe00077f3bb0
fork_exit() at fork_exit+0xd0/frame 0xfffffe00077f3bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00077f3bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100031 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x28ea68a(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                        0x28
rax                       0x12
rcx         0x76e08b990f984007
rdx                        0x1
rbx                          0
rsp         0xfffffe00077f34d0
rbp         0xfffffe00077f34f0
rsi                          0
rdi         0xffffffff817abb09  vprintf+0x319
r8                         0x3
r9          0xfffffe00077f3008
r10                          0
r11                          0
r12         0xfffffe0053dfb740
r13         0xfffffe00077f3501
r14         0xffffffff82c5dac0  .str.18
r15         0xffffffff82c5dac0  .str.18
rip         0xffffffff8179f52b  kdb_enter+0x6b
rflags                    0x46
kdb_enter+0x6b: movq    $0,0x28ea68a(%rip)
db> show proc
Process 12 (intr) at 0xfffffe0053deba70:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff8402af40
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff8402af40 reapsubtree: 12
 sigparent: 20
 vmspace: 0xffffffff8402bec0
   (map 0xffffffff8402bec0)
   (map.pmap 0xffffffff8402bf80)
   (pmap 0xffffffff8402bfe0)
 threads: 23
100012                   I                                   [swi6: task queue]
100013                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100031                   Run     CPU 0                       [swi4: clock (0)]
100032                   I                                   [swi4: clock (1)]
100033                   I                                   [swi1: netisr 0]
100034                   I                                   [swi3: vm]
100035                   I                                   [swi1: hpts]
100036                   I                                   [swi1: hpts]
100049                   I                                   [irq24: virtio_pci0]
100050                   I                                   [irq25: virtio_pci0]
100051                   I                                   [irq26: virtio_pci0]
100052                   I                                   [irq27: virtio_pci0]
100053                   I                                   [irq28: virtio_pci1]
100054                   I                                   [irq29: virtio_pci1]
100055                   I                                   [irq30: virtio_pci1]
100056                   I                                   [irq31: virtio_pci1]
100057                   I                                   [irq32: virtio_pci1]
100062                   I                                   [irq10: virtio_pci2]
100064                   I                                   [irq1: atkbd0]
100065                   I                                   [irq12: psm0]
100066                   I                                   [swi0: uart uart++]
100074                   I                                   [swi1: pf send]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 6096  6094  2282     0  R                                   route
 6094  2282  2282     0  S       piperd  0xfffffe00a7026ba0  sh
 6093   790   790     0  R       (threaded)                  syz-executor.1
105644                   RunQ                                syz-executor.1
105751                   RunQ                                syz-executor.1
 6090   792   792     0  T       (threaded)                  syz-executor.3
105734                   s                                   syz-executor.3
105746                   RunQ                                syz-executor.3
 6088   797   797     0  R       (threaded)                  syz-executor.2
105651                   RunQ                                syz-executor.2
105744                   RunQ                                syz-executor.2
105745                   S       accept  0xfffffe00a79f3508  syz-executor.2
 6087   789   789     0  R       (threaded)                  syz-executor.0
105667                   RunQ                                syz-executor.0
105742                   S       accept  0xfffffe00a79838b8  syz-executor.0
105743                   S       uwait   0xfffffe00a6f59c00  syz-executor.0
 6055     1   789     0  S       uwait   0xfffffe009fe68300  syz-executor.0
 6050     1   789     0  S       uwait   0xfffffe009fe3c380  syz-executor.0
 6045     1   789     0  S       uwait   0xfffffe009feefc00  syz-executor.0
 6040     1   789     0  S       uwait   0xfffffe009e436c80  syz-executor.0
 6039     1   792     0  S       uwait   0xfffffe009feefd00  syz-executor.3
 6037     1   797     0  S       uwait   0xfffffe00a74c7980  syz-executor.2
 6033     1   789     0  S       uwait   0xfffffe00a6f59800  syz-executor.0
 6031     1   792     0  S       uwait   0xfffffe009fe54180  syz-executor.3
 6030     1   797     0  S       uwait   0xfffffe009feef380  syz-executor.2
 6022     1   797     0  S       uwait   0xfffffe009e2e6580  syz-executor.2
 6021     1   792     0  S       uwait   0xfffffe009fe68100  syz-executor.3
 6011     1   797     0  S       uwait   0xfffffe009fe68a00  syz-executor.2
 6010     1   792     0  S       uwait   0xfffffe009e436d80  syz-executor.3
 5999     1   790     0  S       uwait   0xfffffe009fe3c080  syz-executor.1
 5990     1   790     0  S       uwait   0xfffffe009fe3ce80  syz-executor.1
 5989     1   797     0  S       uwait   0xfffffe00a74c7a80  syz-executor.2
 5980     1   790     0  S       uwait   0xfffffe0058392280  syz-executor.1
 5971     1   789     0  S       uwait   0xfffffe009fe68c00  syz-executor.0
 5970     1   790     0  S       uwait   0xfffffe009fe54280  syz-executor.1
 5961     1   789     0  S       uwait   0xfffffe009e436800  syz-executor.0
 5960     1   790     0  S       uwait   0xfffffe009feefa00  syz-executor.1
 5951     1   790     0  S       uwait   0xfffffe009e436400  syz-executor.1
 5950     1   789     0  S       uwait   0xfffffe009fe54900  syz-executor.0
 5940     1   790     0  S       uwait   0xfffffe009fe68400  syz-executor.1
 5931     1   790     0  S       uwait   0xfffffe009feef880  syz-executor.1
 5921     1   790     0  S       uwait   0xfffffe0096d39a00  syz-executor.1
 5912     1   790     0  S       uwait   0xfffffe0096d39e00  syz-executor.1
 5903     1   790     0  S       uwait   0xfffffe009feef180  syz-executor.1
 4960     1  4960    65  Rs                                  dhclient
 4574     1  4574     0  Ss      select  0xfffffe0096c199c0  dhclient
 4544     1  4544     0  Ss      select  0xfffffe009e547a40  dhclient
 4525     1  4525    65  Rs                                  dhclient
 3609     1  3609     0  Ss      select  0xfffffe0096c19e40  dhclient
 3598     1  3598     0  Ss      select  0xfffffe0096c196c0  dhclient
 3579     1  3579    65  Ss      piperd  0xfffffe0096d22160  dhclient
 2282     1  2282     0  Ss      wait    0xfffffe00a73c3a70  dhclient
 2274     1  2274     0  Ss      select  0xfffffe0096c19840  dhclient
 2255     1  2255    65  Rs                                  dhclient
 1910     1   789     0  S       uwait   0xfffffe009e466580  syz-executor.0
 1905     1   789     0  S       uwait   0xfffffe009fe54780  syz-executor.0
 1808     1   797     0  S       uwait   0xfffffe009fe3c280  syz-executor.2
 1807     1   797     0  S       uwait   0xfffffe009fe68e00  syz-executor.2
 1355     1  1355     0  Ss      select  0xfffffe0096c193c0  dhclient
 1348     1  1348     0  Ss      select  0xfffffe009e547ec0  dhclient
  910     1   789     0  S       uwait   0xfffffe009e436700  syz-executor.0
  907     1   789     0  S       uwait   0xfffffe009e466f00  syz-executor.0
  900     1   789     0  S       uwait   0xfffffe009e2e6a00  syz-executor.0
  899     1   789     0  S       uwait   0xfffffe009e2e6680  syz-executor.0
  887     1   789     0  S       uwait   0xfffffe009e436500  syz-executor.0
  882     1   789     0  S       uwait   0xfffffe009e466480  syz-executor.0
  866     0     0     0  DL      aiordy  0xfffffe009fe30538  [aiod4]
  865     0     0     0  DL      aiordy  0xfffffe009fe58000  [aiod3]
  864     0     0     0  DL      aiordy  0xfffffe009fe58538  [aiod2]
  863     0     0     0  DL      aiordy  0xfffffe009fe58a70  [aiod1]
  797   780   797     0  Rs                                  syz-executor.2
  792   780   792     0  Ss      wait    0xfffffe0096c93538  syz-executor.3
  790   780   790     0  Rs                                  syz-executor.1
  789   780   789     0  Rs                                  syz-executor.0
  780   778   778     0  R       (threaded)                  syz-fuzzer
100119                   S       uwait   0xfffffe009e466780  syz-fuzzer
100120                   RunQ                                syz-fuzzer
100121                   S       uwait   0xfffffe009e466980  syz-fuzzer
100122                   S       uwait   0xfffffe009e466a80  syz-fuzzer
100123                   S       uwait   0xfffffe009e466b80  syz-fuzzer
100124                   S       uwait   0xfffffe009e466c80  syz-fuzzer
100125                   S       uwait   0xfffffe009e466e00  syz-fuzzer
100126                   RunQ                                syz-fuzzer
100128                   S       uwait   0xfffffe009e2e6880  syz-fuzzer
100129                   S       uwait   0xfffffe0058392180  syz-fuzzer
  778   776   778     0  Ss      pause   0xfffffe0096dff0b0  csh
  776   694   776     0  Ss      select  0xfffffe0096c19240  sshd
  760     1   760     0  Rs+                                 getty
  759     1   759     0  Ss+     ttyin   0xfffffe00575fa8b0  getty
  758     1   758     0  Ss+     ttyin   0xfffffe00583f00b0  getty
  757     1   757     0  Ss+     ttyin   0xfffffe00583f08b0  getty
  756     1   756     0  Ss+     ttyin   0xfffffe00583ec0b0  getty
  755     1   755     0  Ss+     ttyin   0xfffffe00583ec8b0  getty
  754     1   754     0  Ss+     ttyin   0xfffffe00583970b0  getty
  753     1   753     0  Ss+     ttyin   0xfffffe00583978b0  getty
  752     1   752     0  Ss+     ttyin   0xfffffe00575220b0  getty
  698     1   698     0  Rs                                  cron
  694     1   694     0  Ss      select  0xfffffe0096c1e2c0  sshd
  507     1   507     0  Ss      select  0xfffffe0096c1ec40  syslogd
  436     1   436     0  Ss      select  0xfffffe0096c1e340  devd
  435     1   435    65  Rs                                  dhclient
  350     1   350     0  Ss      select  0xfffffe0096c1e7c0  dhclient
  347     1   347     0  Ss      select  0xfffffe0096c1e740  dhclient
   23     0     0     0  DL      vlruwt  0xfffffe0058770538  [vnlru]
   22     0     0     0  DL      syncer  0xffffffff8417ea80  [syncer]
   21     0     0     0  RL      (threaded)                  [bufdaemon]
100084                   D       qsleep  0xffffffff8417c8c0  [bufdaemon]
100085                   D       -       0xffffffff83411f80  [bufspacedaemon-0]
100097                   RunQ                                [/ worker]
   20     0     0     0  DL      psleep  0xffffffff841b4d40  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100082                   D       psleep  0xffffffff841a8878  [dom0]
100088                   D       launds  0xffffffff841a8884  [laundry: dom0]
100089                   D       umarcl  0xffffffff81e97640  [uma]
   18     0     0     0  DL      -       0xffffffff83e0dba0  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff84d50460  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff84a6ce20  [pf purge]
   15     0     0     0  DL      -       0xffffffff84177d40  [soaiod4]
    9     0     0     0  DL      -       0xffffffff84177d40  [soaiod3]
    8     0     0     0  DL      -       0xffffffff84177d40  [soaiod2]
    7     0     0     0  DL      -       0xffffffff84177d40  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100047                   D       -       0xffffffff83c93340  [doneq0]
100048                   D       -       0xffffffff83c932c0  [async]
100081                   D       -       0xffffffff83c93140  [scanner]
   14     0     0     0  DL      seqstat 0xfffffe0056a61488  [sequencer 00]
    5     0     0     0  DL      crypto_ 0xfffffe00541a1b80  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffffe00541a1b30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff841a2920  [crypto]
   13     0     0     0  DL      (threaded)                  [geom]
100038                   D       -       0xffffffff8402a040  [g_event]
100039                   D       -       0xffffffff8402a080  [g_up]
100040                   D       -       0xffffffff8402a0c0  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100029                   D       -       0xfffffe0053dfed00  [thr_0]
100030                   D       -       0xfffffe0053dfed80  [thr_1]
   12     0     0     0  RL      (threaded)                  [intr]
100012                   I                                   [swi6: task queue]
100013                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100031                   Run     CPU 0                       [swi4: clock (0)]
100032                   I                                   [swi4: clock (1)]
100033                   I                                   [swi1: netisr 0]
100034                   I                                   [swi3: vm]
100035                   I                                   [swi1: hpts]
100036                   I                                   [swi1: hpts]
100049                   I                                   [irq24: virtio_pci0]
100050                   I                                   [irq25: virtio_pci0]
100051                   I                                   [irq26: virtio_pci0]
100052                   I                                   [irq27: virtio_pci0]
100053                   I                                   [irq28: virtio_pci1]
100054                   I                                   [irq29: virtio_pci1]
100055                   I                                   [irq30: virtio_pci1]
100056                   I                                   [irq31: virtio_pci1]
100057                   I                                   [irq32: virtio_pci1]
100062                   I                                   [irq10: virtio_pci2]
100064                   I                                   [irq1: atkbd0]
100065                   I                                   [irq12: psm0]
100066                   I                                   [swi0: uart uart++]
100074                   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    0xfffffe0053d4b538  [init]
   10     0     0     0  DL      audit_w 0xffffffff841a38c0  [audit]
    0     0     0     0  RLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff8402af40  [swapper]
100005                   D       -       0xfffffe0053de6e00  [if_config_tqg_0]
100006                   D       -       0xfffffe0053de6d00  [softirq_0]
100007                   D       -       0xfffffe0053de6c00  [softirq_1]
100008                   D       -       0xfffffe0053de6b00  [if_io_tqg_0]
100009                   D       -       0xfffffe0053de6a00  [if_io_tqg_1]
100010                   D       -       0xfffffe0053de6900  [in6m_free taskq]
100011                   D       -       0xfffffe0053de6800  [deferred_unmount ta]
100014                   Run     CPU 1                       [thread taskq]
100016                   D       -       0xfffffe0053de6300  [linuxkpi_irq_wq]
100017                   D       -       0xfffffe0053de6200  [kqueue_ctx taskq]
100018                   D       -       0xfffffe0053de6100  [aiod_kick taskq]
100019                   D       -       0xfffffe0053de6000  [pci_hp taskq]
100020                   D       -       0xfffffe0053df6e00  [inm_free taskq]
100021                   D       -       0xfffffe0053df6d00  [linuxkpi_short_wq_0]
100022                   D       -       0xfffffe0053df6d00  [linuxkpi_short_wq_1]
100023                   D       -       0xfffffe0053df6d00  [linuxkpi_short_wq_2]
100024                   D       -       0xfffffe0053df6d00  [linuxkpi_short_wq_3]
100025                   D       -       0xfffffe0053df6c00  [linuxkpi_long_wq_0]
100026                   D       -       0xfffffe0053df6c00  [linuxkpi_long_wq_1]
100027                   D       -       0xfffffe0053df6c00  [linuxkpi_long_wq_2]
100028                   D       -       0xfffffe0053df6c00  [linuxkpi_long_wq_3]
100037                   D       -       0xfffffe0053df6b00  [firmware taskq]
100041                   D       -       0xfffffe0053df6a00  [crypto_0]
100042                   D       -       0xfffffe0053df6a00  [crypto_1]
100058                   D       -       0xfffffe0053df6800  [vtnet0 rxq 0]
100059                   D       -       0xfffffe0053df6700  [vtnet0 txq 0]
100060                   D       -       0xfffffe0053df6600  [vtnet0 rxq 1]
100061                   D       -       0xfffffe0053df6500  [vtnet0 txq 1]
100063                   D       vtbslp  0xfffffe0056b76100  [virtio_balloon]
100067                   D       -       0xfffffe0053df6400  [mca taskq]
100072                   D       -       0xffffffff82c64a40  [deadlkres]
100076                   D       -       0xfffffe0057450700  [acpi_task_0]
100077                   D       -       0xfffffe0057450700  [acpi_task_1]
100078                   D       -       0xfffffe0057450700  [acpi_task_2]
100080                   D       -       0xfffffe0053df6900  [CAM taskq]
db> show all locks
Process 6096 (route) thread 0xfffffe00a77d4e40 (105546)
exclusive sx so_rcv_sx (so_rcv_sx) r = 0 (0xfffffe00a79cc8c8) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_sockbuf.c:491
Process 6093 (syz-executor.1) thread 0xfffffe00a77d7900 (105751)
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe00a6e36a90) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4339
exclusive sleep mutex sctp-inp (inp) r = 0 (0xfffffe00a79cb968) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4326
exclusive sleep mutex sctp-create (inp_create) r = 0 (0xfffffe00a79cb988) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_usrreq.c:7011
Process 6090 (syz-executor.3) thread 0xfffffe00a7951e40 (105746)
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe00a6e20a90) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4339
exclusive sleep mutex sctp-inp (inp) r = 0 (0xfffffe00a79ee468) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4326
exclusive sleep mutex sctp-create (inp_create) r = 0 (0xfffffe00a79ee488) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_usrreq.c:7011
Process 12 (intr) thread 0xfffffe0053dfb740 (100031)
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe00a6e21380) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctputil.c:1768
Process 0 (kernel) thread 0xfffffe0053dee3a0 (100014)
exclusive sleep mutex kernel arena (kernel arena) r = 0 (0xffffffff840ad500) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:789
exclusive sleep mutex vmem list lock (vmem list lock) r = 0 (0xffffffff83409bc0) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:784
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4216         4338K         4244
          tcp_hpts            6         3201K            6
         sysctloid        34320         2027K        34390
             vtbuf           24         1968K           46
              kobj          326         1304K          485
            newblk           36         1033K         5794
          vfscache            3         1025K            3
               pcb          439          941K        17463
          filedesc           94          746K        10223
          inodedep           42          528K         5158
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          219          470K         6210
              vmem            3          274K            5
         sctp_atcl          501          188K        10386
            acpica         1674          184K        55752
         sctp_stro          168          168K         2104
         vnet_data            1          168K            1
           tidhash            3          141K            3
            linker          356          140K          396
           pagedep           37          137K         5079
        tfo_ccache            1          128K            1
            DEVFS1          107          107K          124
               sem            4          106K            4
               BPF           46           88K           46
               bus          984           80K         3475
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          509           64K          509
           kdtrace          297           55K        11849
              umtx          418           53K          418
         sctp_stri           97           49K          134
              temp           35           33K         2456
         hostcache            1           32K            1
               shm            1           32K            2
            DEVFS3          126           32K          136
               msg            4           30K            4
         sctp_atky          667           30K        12433
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
            ifaddr           71           21K           73
        DEVFS_RULE           56           20K           56
         ufs_mount            4           17K            5
         sctp_timw           66           17K           66
              proc            3           17K            3
          routetbl          137           17K          438
               tty           16           16K           16
           ithread           99           16K           99
            bus-sc           33           14K         1692
       ether_multi          157           13K          167
            KTRACE          100           13K          100
             ifnet            7           13K            7
           lltable           40           12K           86
              kenv           95           12K           95
      eventhandler          133           12K          133
         CAM queue            5           11K         1528
              GEOM           61           10K          489
              rman           84           10K          425
         in6_multi           71            9K           71
            kqueue          109            9K         6103
         bmsafemap            2            9K         5138
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K            1
               rpc            2            8K            2
             shmfd            1            8K            5
       pfs_vncache            1            8K            1
         sctp_athm          501            8K        10491
         pfs_nodes           20            8K           20
     audit_evclass          236            8K          294
           pwddesc          107            7K         6097
         taskqueue           63            7K           63
              cred           26            7K          257
            sglist            5            7K            5
           CAM DEV            3            6K          510
            plimit           24            6K          439
          sctp_map          336            6K         4208
            DEVFSP           80            5K          136
       ufs_dirhash           24            5K           24
            dirrem           18            5K         5075
               UMA          270            5K          270
           session           35            5K           61
          pf_ifnet           10            5K           19
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
         newdirblk           32            4K         5060
             evdev            4            4K            4
          kcovinfo           64            4K           68
           acpisem           28            4K           28
             lockf           32            4K           57
             hhook           15            4K           17
             selfd           52            4K        90500
         proc-args           54            3K          687
          terminal           11            3K           11
            select           19            3K           59
           uidinfo            3            3K           13
        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
       inpcbpolicy           49            2K         1982
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
               msi            9            2K            9
             clone            9            2K            9
             sigio           18            2K           19
               tun            7            2K            7
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           54
      NFSD session            1            1K            1
             mkdir            7            1K        10120
        CAM periph            4            1K          271
          freework            4            1K         5053
          sctp_ifn            6            1K           15
             ipsec            3            1K            3
          freeblks            3            1K         5040
               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
          freefile            5            1K         5039
            crypto            4            1K           16
 encap_export_host           12            1K           12
          procdesc            5            1K           18
            diradd            4            1K         5115
              pfil            4            1K            4
              cdev            2            1K            2
               osd           11            1K         1390
    chacha20random            1            1K            1
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            vnodes            1            1K            1
           CAM SIM            2            1K            2
              ktls            1            1K            1
            feeder            7            1K            7
           tcpfunc            3            1K            3
        loginclass            3            1K            6
            prison            6            1K            6
       lkpikmalloc            5            1K            6
            soname            7            1K        11530
        aesni_data            2            1K            2
            apmdev            1            1K            1
          atkbddev            2            1K            2
     CAM dev queue            2            1K            2
             xform            2            1K          106
 CAM I/O Scheduler            1            1K            1
          CAM path            4            1K         1034
          pmchooks            1            1K            1
          nexusdev            7            1K            7
          filecaps            5            1K          116
          sctp_vrf            1            1K            1
              vnet            1            1K            1
           entropy            2            1K           45
          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
            mqdata            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K         4170
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           pf_rule            0            0K            2
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               xnb            0            0K            0
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           jblocks            0            0K            0
          savedino            0            0K         3099
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             sbdep            0            0K           23
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        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
         MLX5E_TLS            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
            MLX5EN            0            0K            0
        MLX5EEPROM            0            0K            0
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            ip6opt            0            0K            6
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               LRO            0            0K            0
      newreno data            0            0K            0
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       ip_moptions            0            0K            0
        in_mfilter            0            0K            0
              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
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              zlib            0            0K            0
           fadvise            0            0K            0
           VN POLL            0            0K            0
            twsbuf            0            0K            0
            statfs            0            0K         5275
     namei_tracker            0            0K            0
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      twe_commands            0            0K            0
      twa_commands            0            0K            0
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               PUC            0            0K            0
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    osti_cacheable            0            0K            0
          mbuf_tag            0            0K          127
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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
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              nvme            0            0K            0
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               iov            0            0K        18952
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           eventfd            0            0K            6
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             stack            0            0K            0
            MPSSAS            0            0K            0
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            MPRSAS            0            0K            0
               mpr            0            0K            0
            mfibuf            0            0K            0
              sbuf            0            0K          288
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            sysctl            0            0K            3
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              rctl            0            0K            0
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       aacraid_buf            0            0K            0
                ix            0            0K            0
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             cache            0            0K            0
            iirbuf            0            0K            0
      prison_racct            0            0K            0
       Fail Points            0            0K            0
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
            XZ_DEC            0            0K            0
            nvlist            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
     NFSCL flayout            0            0K            0
      NFSCL layout            0            0K            0
     NFSD rollback            0            0K            0
      NFSCL diroff            0            0K            0
db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8320     992     1240097       0     254   38141952        0
           tcp_log    416      45   11205      180760       0     254    4680000        0
              pbuf   2624       0     989           0       0       2    2595136        0
              mbuf    256    8952     618     1974415       0     254    2449920        0
        RADIX NODE    144   15360     119      187007       0      62    2228976        0
        malloc-384    384    4740      30       14712       0      30    1831680        0
       malloc-4096   4096     435       1       11861       0       2    1785856        0
          BUF TRIE    144     191   11569         959       0      62    1693440        0
        malloc-128    128   11266      18       11329       0     126    1444352        0
      mbuf_cluster   2048     660       0         660       0     254    1351680        0
       UMA Slabs 0    112   10827       6       10827       0     126    1213296        0
         vmem btag     56   18792     119       18792       0     254    1059016        0
      malloc-16384  16384      51       4        5129       0       1     901120        0
         sctp_asoc   2288     168     157        2104       0     254     743600        0
         FFS inode   1160     551      23        5590       0       8     665840        0
       malloc-2048   2048     175      81        8090       0       8     524288        0
         VM OBJECT    264    1901      34       87714       0      30     510840        0
           sctp_ep   1280     238     155        8085       0     254     503040        0
      malloc-65536  65536       5       2         233       0       1     458752        0
        256 Bucket   2048     216       6       17585       0       8     454656        0
         MAP ENTRY     96    3952     206      328030       0     126     399168        0
       malloc-1024   1024     301      83        3515       0      16     393216        0
            lkpimm    168       1    2327           1       0      62     391104        0
          lkpicurr    168       2    2326           2       0      62     391104        0
            THREAD   1808     189      20        5751       0       8     377872        0
        sctp_raddr    736     496      10        2432       0     254     372416        0
       tcp_bbr_map    128       0    2666       33875       0     126     341248        0
        malloc-256    256     218    1102        9467       0      62     337920        0
    ertt_txseginfo     40       0    7979       95177       0     254     319160        0
        malloc-384    384      44     736        5183       0      30     299520        0
             VNODE    448     590      67        5631       0      30     294336        0
         malloc-64     64    3852      54        3867       0     254     249984        0
            socket    944     244      20       11440       0     254     249216        0
         malloc-16     16   14342     408       19686       0     254     236000        0
            DEVCTL   1024       0     220         154       0       0     225280        0
           VMSPACE   2544      80       4        6071       0       4     213696        0
         UMA Zones    768     242       2         242       0      16     187392        0
         malloc-32     32    5284     134        5443       0     254     173376        0
       mbuf_packet    256     118     542       11662       0     254     168960        0
        malloc-128    128    1213      89       36263       0     126     166656        0
      malloc-32768  32768       0       5         187       0       1     163840        0
        malloc-256    256      47     568        5819       0      62     157440        0
              PROC   1336     106       5        6096       0       8     148296        0
       FFS2 dinode    256     551      19        5590       0      62     145920        0
        malloc-128    128    1097      19        1243       0     126     142848        0
       S VFS Cache    104    1030     335        6152       0     126     141960        0
      malloc-65536  65536       0       2         136       0       1     131072        0
      malloc-65536  65536       2       0           2       0       1     131072        0
         filedesc0   1072     107       5        6097       0       8     120064        0
       malloc-2048   2048      10      48        1045       0       8     118784        0
          ksiginfo    112      92     952        2625       0     126     116928        0
        malloc-128    128      15     791        5052       0     126     103168        0
        128 Bucket   1024      74      21        1376       0      16      97280        0
        malloc-256    256     303      72       13862       0      62      96000        0
       malloc-4096   4096      22       0         643       0       2      90112        0
          UMA Kegs    384     227       6         227       0      30      89472        0
        malloc-256    256     224      91        6498       0      62      80640        0
             g_bio    408       0     190        7512       0      30      77520        0
         tcp_inpcb    496       7     145        1379       0     254      75392        0
       malloc-4096   4096      15       3          34       0       2      73728        0
        sctp_chunk    152     428      40         692       0     254      71136        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       0       1           8       0       1      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
       malloc-8192   8192       8       0           8       0       1      65536        0
       malloc-8192   8192       6       2           8       0       1      65536        0
         64 Bucket    512      90      38        6247       0      30      65536        0
        malloc-128    128     404      61        5926       0     126      59520        0
       malloc-4096   4096      12       2          24       0       2      57344        0
       malloc-1024   1024      17      39         529       0      16      57344        0
        malloc-512    512     104       8         207       0      30      57344        0
             tcpcb   1080       7      42        1379       0     254      52920        0
        sctp_laddr     48     346     662        3529       0     254      48384        0
         malloc-64     64     593     163        2657       0     254      48384        0
         malloc-64     64     635     121       18239       0     254      48384        0
        malloc-384    384     114       6         115       0      30      46080        0
         32 Bucket    256      76     104        4888       0      62      46080        0
        malloc-128    128     188     153        3953       0     126      43648        0
            clpbuf   2624       0      16          23       0      16      41984        0
       malloc-8192   8192       5       0           5       0       1      40960        0
            pcpu-8      8    4714     406        4870       0     254      40960        0
         malloc-64     64     480     150        1067       0     254      40320        0
        malloc-256    256     141       9         613       0      62      38400        0
           DIRHASH   1024      34       2          34       0      16      36864        0
             NAMEI   1024       0      36       35474       0      16      36864        0
             Files     80     382      68       24332       0     126      36000        0
            da_ccb    544       0      63        1994       0      16      34272        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-16384  16384       0       2         160       0       1      32768        0
       malloc-8192   8192       1       3          29       0       1      32768        0
       malloc-8192   8192       2       2          10       0       1      32768        0
       malloc-2048   2048       9       7          34       0       8      32768        0
           pcpu-64     64     487      25         487       0     254      32768        0
         malloc-64     64      60     444       90532       0     254      32256        0
         malloc-64     64     177     327         826       0     254      32256        0
         TURNSTILE    136     210      21         210       0      62      31416        0
       tcp_bbr_pcb    832       0      36        1183       0      16      29952        0
         malloc-32     32     543     339       15441       0     254      28224        0
             KNOTE    160      28     147      154148       0      62      28000        0
        malloc-256    256      71      34        5253       0      62      26880        0
       malloc-8192   8192       1       2         102       0       1      24576        0
       malloc-2048   2048       7       5          80       0       8      24576        0
               PWD     32      54     702        5154       0     254      24192        0
         malloc-32     32     418     338         960       0     254      24192        0
            ttyinq    160     135      15         300       0      62      24000        0
          8 Bucket     80      54     246        1833       0     126      24000        0
           ttyoutq    256      72      18         160       0      62      23040        0
        malloc-256    256      39      51        6082       0      62      23040        0
        SLEEPQUEUE     88     210      46         210       0     126      22528        0
              pipe    744      24       6         451       0      16      22320        0
         malloc-64     64     235      80       12313       0     254      20160        0
         16 Bucket    144      55      85         433       0      62      20160        0
     udplite_inpcb    496      30      10         113       0     254      19840        0
        sctp_readq    152     106      24         106       0     254      19760        0
       Mountpoints   2752       2       5           2       0       4      19264        0
        malloc-256    256      46      29        5268       0      62      19200        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-2048   2048       4       4         195       0       8      16384        0
       malloc-1024   1024       2      14          42       0      16      16384        0
         malloc-64     64     113     139        7324       0     254      16128        0
      vtnet_tx_hdr     24       0     668      625576       0     254      16032        0
         malloc-16     16     568     432       10645       0     254      16000        0
             ripcb    496       5      27         261       0     254      15872        0
        malloc-128    128      45      79        5882       0     126      15872        0
        malloc-384    384      25      15          28       0      30      15360        0
      tcp_rack_pcb    832       0      18           6       0      16      14976        0
        malloc-512    512       8      16         126       0      30      12288        0
         malloc-32     32      17     361        1096       0     254      12096        0
         udp_inpcb    496       7      17         229       0     254      11904        0
              kenv    258      15      30        1042       0      30      11610        0
             unpcb    256      20      25        1333       0     254      11520        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-2048   2048       2       2           2       0       8       8192        0
       malloc-2048   2048       0       4          40       0       8       8192        0
       malloc-1024   1024       1       7           9       0      16       8192        0
       malloc-1024   1024       8       0           8       0      16       8192        0
       malloc-1024   1024       2       6         162       0      16       8192        0
       malloc-1024   1024       6       2           6       0      16       8192        0
        malloc-512    512      12       4          71       0      30       8192        0
           rtentry    176      31      15          35       0      62       8096        0
              PGRP     88      35      57          67       0     126       8096        0
          rl_entry     40      56     146          56       0     254       8080        0
sctp_stream_msg_out    112       0      72         307       0     254       8064        0
      tcp_rack_map    112       0      72          21       0     126       8064        0
             udpcb     32      36     216         342       0     254       8064        0
              AIOP     32       4     248           4       0     254       8064        0
              ertt     72       7     105        1379       0     126       8064        0
         malloc-32     32       8     244          10       0     254       8064        0
         malloc-32     32     141     111        5301       0     254       8064        0
         malloc-32     32      70     182         992       0     254       8064        0
         malloc-32     32      51     201        2764       0     254       8064        0
          4 Bucket     48       6     162         143       0     254       8064        0
          2 Bucket     32      51     201        1022       0     254       8064        0
         malloc-16     16      18     482          57       0     254       8000        0
         malloc-16     16     292     208         298       0     254       8000        0
         malloc-16     16      31     469        9232       0     254       8000        0
         malloc-16     16     190     310        1439       0     254       8000        0
         malloc-16     16      21     479       27220       0     254       8000        0
         malloc-16     16       6     494           7       0     254       8000        0
        malloc-128    128      11      51          18       0     126       7936        0
           cryptop    280       0      28           5       0      30       7840        0
             AIOCB    552       0      14          23       0      16       7728        0
     routing nhops    256      27       3          35       0      62       7680        0
        malloc-384    384      11       9          11       0      30       7680        0
        malloc-384    384       0      20         347       0      30       7680        0
            AIOLIO    272       0      28           2       0      30       7616        0
     FPU_save_area    832       1       8           1       0      16       7488        0
            cpuset    104       7      55           7       0     126       6448        0
 epoch_record pcpu    256       4      12           4       0      62       4096        0
       malloc-4096   4096       0       1           2       0       2       4096        0
       malloc-4096   4096       1       0           1       0       2       4096        0
       malloc-2048   2048       0       2          12       0       8       4096        0
        malloc-512    512       1       7           2       0      30       4096        0
        malloc-512    512       0       8           1       0      30       4096        0
        malloc-512    512       1       7           3       0      30       4096        0
        malloc-512    512       1       7           1       0      30       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
         hostcache     64       1      62           1       0     254       4032        0
          syncache    168       0      24           4       0     254       4032        0
               AIO    208       0      19           7       0      62       3952        0
            itimer    352       0      11           4       0      30       3872        0
       UMA Slabs 1    176       9      13           9       0      62       3872        0
        malloc-384    384       2       8           2       0      30       3840        0
            mqnode    416       3       6           3       0      30       3744        0
        KMAP ENTRY     96      12      27          14       0       0       3744        0
              vmem   1856       1       1           1       0       8       3712        0
           SMR CPU     32       3      60           3       0     254       2016        0
        SMR SHARED     24       3      60           3       0     254       1512        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
      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_ccache_entries     80       0       0           0       0     126          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
    IPsec SA lft_c     16       0       0           0       0     254          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
        TMPFS node    224       0       0           0       0      62          0        0
           NCLNODE    592       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     24       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
      ktls_session    192       0       0           0       0      62          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-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-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-4096   4096       0       0           0       0       2          0        0
       malloc-1024   1024       0       0           0       0      16          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 (10):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/08/05 15:43 freebsd-src f3a3b0612169 7f7bb950 console log report ci-freebsd-main panic: sctp_timer_start of type 5: inp = ADDR, stcb->sctp_ep ADDR
2021/08/02 02:40 freebsd-src 56be282bc999 6c236867 console log report ci-freebsd-main panic: sctp_timer_start of type 5: inp = ADDR, stcb->sctp_ep ADDR
2021/07/26 13:50 freebsd-src ccc510b46340 fd511809 console log report ci-freebsd-main panic: sctp_timer_start of type 5: inp = ADDR, stcb->sctp_ep ADDR
2021/07/20 17:35 freebsd-src 75cb2382b84d e6a17580 console log report ci-freebsd-main panic: sctp_timer_start of type 5: inp = ADDR, stcb->sctp_ep ADDR
2021/07/09 04:53 freebsd-src 25a66f1fb177 1b20171a console log report ci-freebsd-main panic: sctp_timer_start of type 5: inp = ADDR, stcb->sctp_ep ADDR
2021/07/08 20:32 freebsd-src e88c3b1b02a6 1b20171a console log report ci-freebsd-main panic: sctp_timer_start of type 5: inp = ADDR, stcb->sctp_ep ADDR
2021/08/31 02:50 freebsd-src d39e65b5bdc0 8f58a0ef console log report ci-freebsd-main panic: sctp_timer_start of type NUM: inp = ADDR, stcb->sctp_ep ADDR
2021/08/30 16:01 freebsd-src e76c0e4f4563 8f58a0ef console log report ci-freebsd-main panic: sctp_timer_start of type NUM: inp = ADDR, stcb->sctp_ep ADDR
2021/08/26 06:13 freebsd-src 8d7cd10ba633 b599f2fc console log report ci-freebsd-main panic: sctp_timer_start of type NUM: inp = ADDR, stcb->sctp_ep ADDR
2021/08/26 03:46 freebsd-src 8d7cd10ba633 b599f2fc console log report ci-freebsd-main panic: sctp_timer_start of type NUM: inp = ADDR, stcb->sctp_ep ADDR
* Struck through repros no longer work on HEAD.