syzbot


panic: sleeping thread holds tun_mtx

Status: upstream: reported on 2025/06/06 11:36
Reported-by: syzbot+5486c9a44f5c16ee0a4a@syzkaller.appspotmail.com
First crash: 191d, last: 1d04h

Sample crash report:
panic: sleeping thread holds tun_mtx
cpuid = 0
time = 12
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056c829d0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056c82b30
vpanic() at vpanic+0x257/frame 0xfffffe0056c82cf0
panic() at panic+0xb5/frame 0xfffffe0056c82db0
propagate_priority() at propagate_priority+0x521/frame 0xfffffe0056c82e00
turnstile_wait() at turnstile_wait+0x663/frame 0xfffffe0056c82e70
__mtx_lock_sleep() at __mtx_lock_sleep+0x452/frame 0xfffffe0056c82fb0
__mtx_lock_flags() at __mtx_lock_flags+0x1fe/frame 0xfffffe0056c830a0
tunstart_l2() at tunstart_l2+0x74/frame 0xfffffe0056c83100
tap_transmit() at tap_transmit+0x1d0/frame 0xfffffe0056c83150
ether_output_frame() at ether_output_frame+0x30c/frame 0xfffffe0056c83210
ether_output() at ether_output+0x114b/frame 0xfffffe0056c83380
ip_output_send() at ip_output_send+0x170/frame 0xfffffe0056c833f0
ip_output() at ip_output+0x2e32/frame 0xfffffe0056c83650
igmp_intr() at igmp_intr+0x8ae/frame 0xfffffe0056c83790
netisr_dispatch_src() at netisr_dispatch_src+0x219/frame 0xfffffe0056c83870
igmp_v1v2_queue_report() at igmp_v1v2_queue_report+0x522/frame 0xfffffe0056c839b0
igmp_fasttimo() at igmp_fasttimo+0xfb9/frame 0xfffffe0056c83cd0
softclock_call_cc() at softclock_call_cc+0x422/frame 0xfffffe0056c83e80
softclock_thread() at softclock_thread+0x200/frame 0xfffffe0056c83ef0
fork_exit() at fork_exit+0xcc/frame 0xfffffe0056c83f30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0056c83f30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 2 tid 100031 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x2589827(%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         0xfffffe0002bf1850
rdx                          0
rbx         0xffffffff828386e0  .str.27
rsp         0xfffffe0056c82b10
rbp         0xfffffe0056c82b30
rsi                          0
rdi         0xffffffff81661289  printf+0x149
r8                           0
r9                  0xffffffff
r10                          0
r11                        0x5
r12         0xfffffe000781a780
r13         0xfffffffffffffffe
r14         0xffffffff828386e0  .str.27
r15                          0
rip         0xffffffff8164a66e  kdb_enter+0x6e
rflags                    0x46
kdb_enter+0x6e: movq    $0,0x2589827(%rip)
db> show proc
Process 2 (clock) at 0xfffffe0007808008:
 state: NORMAL
 uid: 0 gid: 0 supp gids: 0
 parent: pid 0 at 0xffffffff83b5df80
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff83b5df80 reapsubtree: 2
 sigparent: 20
 vmspace: 0xffffffff83b5ef60
   (map 0xffffffff83b5ef60)
   (map.pmap 0xffffffff83b5f000)
   (pmap 0xffffffff83b5f070)
 threads: 2
100031                   L      *tun_mtx 0xfffffe00079f9780  [clock (0)]
100032                   I                                   [clock (1)]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 1076   765   765     0  R       (threaded)                  syz-executor
100297                   Run     CPU 1                       syz-executor
100485                   RunQ                                syz-executor
100486                   RunQ                                syz-executor
100487                   RunQ                                syz-executor
100488                   RunQ                                syz-executor
 1075     1   765     0  S       uwait   0xfffffe006dfa0300  syz-executor
 1074     1   765     0  S       uwait   0xfffffe0058311a80  syz-executor
 1073     0     0     0  DL      (threaded)                  [KTLS]
100474                   D       -       0xfffffe007783db00  [thr_0]
100475                   D       -       0xfffffe007783db80  [thr_1]
100476                   D       -       0xffffffff83cd68e8  [reclaim_0]
 1071   763   763     0  T       (threaded)                  syz-executor
100421                   s                                   syz-executor
100466                   D       in_mult 0xffffffff83ce7aa0  syz-executor
100469                   D       in_mult 0xffffffff83ce7aa0  syz-executor
100471                   D       in_mult 0xffffffff83ce7aa0  syz-executor
100473                   s                                   syz-executor
 1068     1   763 60929  S       uwait   0xfffffe0077bc6d00  syz-executor
 1067   932   932    -1  R       (threaded)                  syz-executor
100144                   RunQ                                syz-executor
100460                   D       tun_ioc 0xffffffff83ce4ce0  syz-executor
100465                   S       uwait   0xfffffe00779bec00  syz-executor
100467                   S       uwait   0xfffffe006dfa1100  syz-executor
100472                   D       fork    0xffffffff8283cdc0  syz-executor
100479                   S       sbwait  0xfffffe0059966adc  syz-executor
100483                   S       uwait   0xfffffe0077bc7280  syz-executor
100484                   S       uwait   0xfffffe00779bfa00  syz-executor
 1062     1  1060     0  S       uwait   0xfffffe0077bc7700  syz-executor
 1061     1  1060     0  S       uwait   0xfffffe00779c0400  syz-executor
 1057     1   763     0  S       uwait   0xfffffe006dfa2700  syz-executor
 1051     1   765     0  S       uwait   0xfffffe0058571100  syz-executor
 1048     1   763    -1  S       uwait   0xfffffe0058570e80  syz-executor
 1044     1   763     0  S       uwait   0xfffffe00779c0800  syz-executor
 1038     1   763     0  S       uwait   0xfffffe0077bc7880  syz-executor
 1034   780   423     0  L      *tun_mtx 0xfffffe00079f9780  ifconfig
 1032   764   764     0  T       (threaded)                  syz-executor
100378                   s                                   syz-executor
100404                   D       tun_ioc 0xffffffff83ce4ce0  syz-executor
 1017     1   932     0  S       uwait   0xfffffe006dfa1200  syz-executor
 1015     1   932     0  S       uwait   0xfffffe0007b56980  syz-executor
 1013     1   765     0  S       uwait   0xfffffe0077bc6a80  syz-executor
 1012     1   763     0  S       uwait   0xfffffe00779c0700  syz-executor
  993     1   765     0  S       uwait   0xfffffe006dfa0200  syz-executor
  992     1   765     0  S       uwait   0xfffffe006dfa1500  syz-executor
  989     1   764 60928  S       uwait   0xfffffe0077bc7380  syz-executor
  988     1   765     0  S       uwait   0xfffffe0077bc7080  syz-executor
  984     1   765     0  S       uwait   0xfffffe0058570180  syz-executor
  982     1   763     0  S       uwait   0xfffffe0077bc6f00  syz-executor
  980     1   764     0  S       uwait   0xfffffe0058310780  syz-executor
  977     1   764     0  S       uwait   0xfffffe006dfa2900  syz-executor
  966     1   764     0  S       uwait   0xfffffe005856f100  syz-executor
  962     1   763     0  S       uwait   0xfffffe006dfa0b80  syz-executor
  961     1   763     0  S       uwait   0xfffffe0058571000  syz-executor
  954     1   763     0  S       uwait   0xfffffe005830e180  syz-executor
  953     1   763     0  S       uwait   0xfffffe00779c0900  syz-executor
  946     0     0     0  DL      -       0xffffffff83cd50c0  [soaiod4]
  945     0     0     0  DL      -       0xffffffff83cd50c0  [soaiod3]
  944     0     0     0  DL      -       0xffffffff83cd50c0  [soaiod2]
  943     0     0     0  DL      -       0xffffffff83cd50c0  [soaiod1]
  941     1   932    -1  S       uwait   0xfffffe006dfa0d80  syz-executor
  932   762   932     0  S       nanslp  0xffffffff83bb4f40  syz-executor
  925     1   763     0  S       uwait   0xfffffe006dfa1400  syz-executor
  915     1   765     0  S       uwait   0xfffffe0058572980  syz-executor
  913     1   763     0  S       uwait   0xfffffe006dfa2b00  syz-executor
  907     1   765     0  S       umtxn   0xfffffe006dfa1c00  syz-executor
  906     1   766     0  S       uwait   0xfffffe0077bc7600  syz-executor
  905     1   763     0  S       uwait   0xfffffe006dfa0600  syz-executor
  904     1   764     0  SV      uwait   0xfffffe006dfa0800  syz-executor
  899     1   765     0  S       uwait   0xfffffe0058572880  syz-executor
  897     1   765     0  S       uwait   0xfffffe0058570b80  syz-executor
  896     1   766     0  S       uwait   0xfffffe0058311c80  syz-executor
  892     1   765     0  S       uwait   0xfffffe0058572d80  syz-executor
  890     1   763     0  S       uwait   0xfffffe0058311980  syz-executor
  886     1   764     0  S       uwait   0xfffffe006dfa0e80  syz-executor
  884     1   764     0  S       uwait   0xfffffe0058572e80  syz-executor
  881     0     0     0  DL      (threaded)                  [so_splice]
100091                   D       -       0xfffffe00779c0a00  [thr_0]
100167                   D       -       0xfffffe00779c0a40  [thr_1]
  880     1   764     0  S       uwait   0xfffffe006dfa1300  syz-executor
  856     1   763     0  S       uwait   0xfffffe006dfa1000  syz-executor
  855     1   763     0  S       uwait   0xfffffe005830e480  syz-executor
  852     1   763     0  S       uwait   0xfffffe0077bc7980  syz-executor
  840     1   766     0  SV      uwait   0xfffffe0058570d80  syz-executor
  833     0     0     0  DL      mdwait  0xfffffe00542b7000  [md127]
  831     0     0     0  DL      aiordy  0xfffffe005860bab8  [aiod4]
  830     0     0     0  DL      aiordy  0xfffffe005870aab8  [aiod3]
  829     0     0     0  DL      aiordy  0xfffffe005870b010  [aiod2]
  828     0     0     0  DL      aiordy  0xfffffe005870b568  [aiod1]
  823     1   765     0  S       uwait   0xfffffe006dfa2a00  syz-executor
  780   771   423     0  S       wait    0xfffffe00586ed570  sh
  771   423   423     0  S       wait    0xfffffe00586cd010  sh
  765   762   765     0  R                                   syz-executor
  764   762   764     0  S       nanslp  0xffffffff83bb4f40  syz-executor
  763   762   763     0  R                                   syz-executor
  762     1   760     0  S       select  0xfffffe006dfa25c0  syz-executor
  758   681   758     0  Ss      select  0xfffffe006dfa26c0  sshd
  747     1   747     0  Ss+     ttyin   0xfffffe00541be4b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe00542a8cb0  getty
  745     1   745     0  Ss+     ttyin   0xfffffe00542a90b0  getty
  744     1   744     0  Ss+     ttyin   0xfffffe00542a94b0  getty
  743     1   743     0  Ss+     ttyin   0xfffffe00541bc4b0  getty
  742     1   742     0  Ss+     ttyin   0xfffffe00542a98b0  getty
  741     1   741     0  Ss+     ttyin   0xfffffe00542a9cb0  getty
  740     1   740     0  Ss+     ttyin   0xfffffe00542aa0b0  getty
  739     1   739     0  Ss+     ttyin   0xfffffe00542aa4b0  getty
  737     1    17     0  S+      piperd  0xfffffe00598d19e0  logger
  736   735    17     0  S+      nanslp  0xffffffff83bb4f40  sleep
  735     1    17     0  S+      wait    0xfffffe005860b008  sh
  685     1   685     0  Ss      nanslp  0xffffffff83bb4f41  cron
  681     1   681     0  Ss      select  0xfffffe00585705c0  sshd
  494     1   494     0  Ss      select  0xfffffe0007b56ec0  syslogd
  423     1   423     0  Ss      wait    0xfffffe005860c568  devd
  422     1   422    65  Ss      select  0xfffffe005830e0c0  dhclient
  337     1   337     0  Ss      piperd  0xfffffe00598d39e0  dhclient
  334     1   334     0  Ss      select  0xfffffe00585711c0  dhclient
   16     0     0     0  RL                                  [syncer]
   15     0     0     0  DL      vlruwt  0xfffffe0058602558  [vnlru]
   14     0     0     0  RL      (threaded)                  [bufdaemon]
100079                   RunQ                                [bufdaemon]
100082                   D       -       0xffffffff83001ec0  [bufspacedaemon-0]
100094                   D       sdflush 0xfffffe005998dce8  [/ worker]
    9     0     0     0  DL      psleep  0xffffffff83d22380  [vmdaemon]
    8     0     0     0  DL      (threaded)                  [pagedaemon]
100077                   D       psleep  0xffffffff83d08448  [dom0]
100080                   D       launds  0xffffffff83d08454  [laundry: dom0]
100081                   D       umarcl  0xffffffff81e347c0  [uma]
    7     0     0     0  DL      -       0xffffffff8392d510  [rand_harvestq]
    6     0     0     0  RL                                  [pf purge]
    5     0     0     0  DL      waiting 0xffffffff844c0700  [sctp_iterator]
    4     0     0     0  DL      (threaded)                  [cam]
100045                   D       -       0xffffffff838f7340  [doneq0]
100046                   D       -       0xffffffff838f72c0  [async]
100075                   D       -       0xffffffff838f7140  [scanner]
    3     0     0     0  DL      (threaded)                  [crypto]
100042                   D       crypto_ 0xffffffff83d03ce0  [crypto]
100043                   D       crypto_ 0xfffffe0007b6ad30  [crypto returns 0]
100044                   D       crypto_ 0xfffffe0007b6ad80  [crypto returns 1]
   13     0     0     0  DL      (threaded)                  [geom]
100037                   D       -       0xffffffff83b5d540  [g_event]
100038                   D       -       0xffffffff83b5d560  [g_up]
100039                   D       -       0xffffffff83b5d580  [g_down]
    2     0     0     0  LL      (threaded)                  [clock]
100031                   L      *tun_mtx 0xfffffe00079f9780  [clock (0)]
100032                   I                                   [clock (1)]
   12     0     0     0  RL      (threaded)                  [intr]
100013                   I                                   [swi6: task queue]
100014                   I                                   [swi6: Giant taskq]
100016                   I                                   [swi5: fast taskq]
100033                   I                                   [swi1: netisr 0]
100034                   I                                   [swi1: hpts]
100035                   RunQ                                [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    0xfffffe0007809010  [init]
   10     0     0     0  DL      audit_w 0xffffffff83d04780  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       -       0xffffffff84c5aff0  [kernel]
100005                   D       -       0xfffffe0007aa1000  [softirq_0]
100006                   D       -       0xfffffe0007aa0e00  [softirq_1]
100007                   D       -       0xfffffe0007aa0d00  [if_io_tqg_0]
100008                   D       -       0xfffffe0007aa0c00  [if_io_tqg_1]
100009                   D       -       0xfffffe0007aa0b00  [if_config_tqg_0]
100010                   D       -       0xfffffe000776bb00  [kqueue_ctx taskq]
100011                   D       -       0xfffffe000776ba00  [jail_remove taskq]
100012                   D       -       0xfffffe000776b900  [bus taskq]
100015                   D       -       0xfffffe000776b600  [thread taskq]
100017                   D       -       0xfffffe000776b400  [aiod_kick taskq]
100018                   D       -       0xfffffe000776b300  [deferred_unmount ta]
100019                   D       -       0xfffffe000776b200  [inm_free taskq]
100020                   D       -       0xfffffe000776b100  [in6m_free taskq]
100021                   D       -       0xfffffe000776b000  [linuxkpi_irq_wq]
100022                   D       -       0xfffffe000776ae00  [linuxkpi_short_wq_0]
100023                   D       -       0xfffffe000776ae00  [linuxkpi_short_wq_1]
100024                   D       -       0xfffffe000776ae00  [linuxkpi_short_wq_2]
100025                   D       -       0xfffffe000776ae00  [linuxkpi_short_wq_3]
100026                   D       -       0xfffffe000776ad00  [linuxkpi_long_wq_0]
100027                   D       -       0xfffffe000776ad00  [linuxkpi_long_wq_1]
100028                   D       -       0xfffffe000776ad00  [linuxkpi_long_wq_2]
100029                   D       -       0xfffffe000776ad00  [linuxkpi_long_wq_3]
100036                   D       -       0xfffffe000776ac00  [firmware taskq]
100040                   D       -       0xfffffe000776aa00  [crypto_0]
100041                   D       -       0xfffffe000776aa00  [crypto_1]
100056                   D       -       0xfffffe000776a800  [vtnet0 rxq 0]
100057                   D       -       0xfffffe000776a700  [vtnet0 txq 0]
100058                   D       -       0xfffffe000776a600  [vtnet0 rxq 1]
100059                   D       -       0xfffffe000776a500  [vtnet0 txq 1]
100061                   D       vtbslp  0xfffffe0007785c00  [virtio_balloon]
100065                   D       -       0xffffffff8283cdc1  [deadlkres]
100069                   D       -       0xfffffe00585f1a00  [acpi_task_0]
100070                   D       -       0xfffffe00585f1a00  [acpi_task_1]
100071                   D       -       0xfffffe00585f1a00  [acpi_task_2]
100073                   D       -       0xfffffe000776c000  [mca taskq]
100074                   D       -       0xfffffe000776a900  [CAM taskq]
100076                   D       -       0xfffffe000776a300  [ipsec_offload]
100166                   D       -       0xfffffe006df55500  [netlink_socket (PID]
100226                   D       -       0xfffffe006df55400  [netlink_socket (PID]
 1007     1   763     0  Z                                   syz-executor
db> show all locks
Process 1067 (syz-executor) thread 0xfffffe0058741780 (100460)
exclusive sx in_multi_sx (in_multi_sx) r = 0 (0xffffffff83ce7aa0) locked @ /syzkaller/managers/main/kernel/sys/netinet/in_mcast.c:2016
Process 1067 (syz-executor) thread 0xfffffe005872a000 (100479)
exclusive sx so_snd_sx (so_snd_sx) r = 0 (0xfffffe0059966980) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_socket.c:4836
Process 1034 (ifconfig) thread 0xfffffe005871e000 (100139)
exclusive sx tun_ioctl (tun_ioctl) r = 0 (0xffffffff83ce4ce0) locked @ /syzkaller/managers/main/kernel/sys/net/if_tuntap.c:1440
Process 1032 (syz-executor) thread 0xfffffe0058745780 (100404)
exclusive sleep mutex tun_mtx (tun_mtx) r = 0 (0xfffffe006df83398) locked @ /syzkaller/managers/main/kernel/sys/net/if_tuntap.c:1741
Process 2 (clock) thread 0xfffffe000781a780 (100031)
exclusive sleep mutex if_addr_lock (if_addr_lock) r = 0 (0xfffffe00596b19a8) locked @ /syzkaller/managers/main/kernel/sys/netinet/igmp.c:1759
exclusive sleep mutex igmp_mtx (igmp_mtx) r = 0 (0xffffffff83ce7840) locked @ /syzkaller/managers/main/kernel/sys/netinet/igmp.c:1715
exclusive sleep mutex in_multi_list_mtx (in_multi_list_mtx) r = 0 (0xffffffff83ce7a60) locked @ /syzkaller/managers/main/kernel/sys/netinet/igmp.c:1714
shared rw vnet_rwlock (vnet_rwlock) r = 0 (0xffffffff83ce70e0) locked @ /syzkaller/managers/main/kernel/sys/netinet/igmp.c:1671
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            6        12804K            6
            linker          409         5602K          608
          tcp_hpts            8         4865K            8
            devbuf         4187         4324K         4214
         sysctloid        35504         2092K        35696
             vtbuf           24         1968K           46
              kobj          337         1348K          521
            newblk           27         1031K         1779
          vfscache            3         1025K            3
          filedesc          108          858K          454
               pcb           40          678K          142
          inodedep           23          521K          400
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
           subproc          230          478K         1201
              intr            4          472K            4
         vnet_data            2          224K            2
          acpitask            1          224K            1
            KTRACE          101          201K        17789
            acpica         1674          184K        56983
              vmem            5          144K            7
           tidhash            3          141K            3
           pagedep           16          132K          189
        tfo_ccache            1          128K            1
          IP reass            1          128K            1
            DEVFS1          108          108K          128
               sem            4          106K            4
        gtaskqueue           18           98K           18
               LRO           24           87K           24
               bus         1020           83K         5178
          mtx_pool            3           74K            3
          syncache            1           68K            1
     NFSD srvcache            3           68K            3
            module          530           67K          532
       ddb_capture            1           64K            1
           kdtrace          309           57K         1570
              umtx          400           50K          400
               shm            3           36K            6
         hostcache            1           32K            1
            DEVFS3          127           32K          138
               msg            4           30K            4
            kbdmux            6           28K            6
              temp           36           21K         2013
            ifaddr           75           21K           77
        DEVFS_RULE           56           20K           56
               BPF           16           19K           22
          routetbl          154           17K          467
         ufs_mount            4           17K            5
              proc            3           17K            3
           lltable           52           16K           53
               tty           16           16K           16
       ether_multi          195           16K          210
           ithread           90           15K           90
            bus-sc           34           15K         1693
             ifnet            8           15K            8
      eventhandler          163           14K          163
              cred           34           13K          225
              kenv           95           12K           95
              GEOM           54           12K          484
         in6_multi           76           11K           76
            plimit           27           11K          332
         CAM queue            5           11K         1528
              rman           75           10K          440
               rpc            8            9K            8
            kqueue          118            9K         1231
         bmsafemap            2            9K          341
              ksem            2            9K            4
           devstat            4            9K            4
              UART           12            9K           12
             shmfd            1            8K            8
       pfs_vncache            1            8K            1
         taskqueue           75            8K           78
     audit_evclass          240            8K          306
           pwddesc          107            7K         1217
            sglist            6            7K            6
           CAM DEV            3            6K          510
         pfs_nodes           22            6K           22
       ufs_dirhash           24            5K           30
          pf_ifnet           11            5K           22
               UMA          272            5K          273
      tcp_fsb_rack            2            5K            2
                vt           11            5K           11
           md_disk            2            5K           23
           memdesc            1            4K            1
               MCA           32            4K           32
        md_sectors            1            4K           18
             evdev            4            4K            4
            DEVFSP           57            4K          151
           acpisem           28            4K           28
         proc-args          127            4K         2139
          kcovinfo           45            3K           45
          terminal           11            3K           11
           uidinfo            6            3K           14
           session           21            3K           38
           acpidev           20            3K           20
             selfd           37            3K        50209
             hhook            8            3K           10
            CC Mem           18            3K           84
             clone            9            3K            9
             lockf           22            3K          108
            ip6ndp           14            3K           16
           netlink            2            3K           84
        local_apic            1            2K            1
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         ipsec-saq            2            2K            2
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               tun            5            2K            5
            Unitno           30            2K          551
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           CAM XPT           22            2K          543
         sctp_atcl            4            2K           27
            dirrem            6            2K          288
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               msi            9            2K            9
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               agp            0            0K            0
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              zstd            0            0K            0
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           SCSI sa            0            0K            0
         scsi_pass            0            0K            0
           scsi_da            0            0K           70
            ata_da            0            0K            0
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           nvme_da            0            0K            0
           CAM CCB            0            0K          523
     CAM ccb queue            0            0K            0
db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8338    1568       45404       0     254   40574976        0
              mbuf    256    8817    1355       50765       0     254    2604032        0
          BUF TRIE    152     331   11473        1483       0      62    1794208        0
        malloc-384    384    4144      56        4332       0      30    1612800        0
           tcp_log    416    3430     386        6573       0     254    1587456        0
        malloc-128    128   11688     185       11840       0     126    1519744        0
        RADIX NODE    152    9107     222       37622       0      62    1418008        0
       malloc-4096   4096     337       3         525       0       2    1392640        0
         malloc-64     64    4169   16936       54667       0     254    1350720        0
       UMA Slabs 0    112   11608      14       11608       0     126    1301664        0
      mbuf_cluster   2048     508       0         508       0     254    1040384        0
         vmem btag     56   17723     172       18717       0     254    1002120        0
      malloc-16384  16384      56       3         417       0       1     966656        0
      malloc-65536  65536      10       1          13       0       1     720896        0
         FFS inode   1168     580      29         804       0       8     711312        0
           sctp_ep   1152       4     507          26       0     254     588672        0
         sctp_asoc   2256       0     255           1       0     254     575280        0
            socket   1024      88     420        1680       0     254     520192        0
          lkpicurr    168       2    3094           2       0      62     520128        0
              pbuf   2664       0     182           0       0       2     484848        0
       malloc-4096   4096     116       2        1217       0       2     483328        0
        256 Bucket   2048     204      12        1456       0       8     442368        0
         VM OBJECT    248    1626      54       16311       0      62     416640        0
            THREAD   1860     199       1         489       0       8     372000        0
       malloc-2048   2048     115      61        1391       0       8     360448        0
             VNODE    440     620      73         846       0      30     304920        0
      malloc-32768  32768       3       6         208       0       1     294912        0
         MAP ENTRY     96    2708     190       53290       0     126     278208        0
      malloc-65536  65536       4       0           4       0       1     262144        0
         malloc-16     16   14770     230       16421       0     254     240000        0
            DEVCTL   1024      34     186         159       0       0     225280        0
      malloc-65536  65536       1       2           3       0       1     196608        0
        malloc-128    128    1181     338       30574       0     126     194432        0
        sctp_raddr    736       0     264           1       0     254     194304        0
         malloc-32     32    5459     463        5694       0     254     189504        0
         UMA Zones    768     244       0         245       0      16     187392        0
     FPU_save_area    832     200      16         664       0      16     179712        0
        malloc-128    128    1217     178        2829       0     126     178560        0
       FFS2 dinode    256     580     110         804       0      62     176640        0
            lkpimm     56       1    3095           1       0     254     173376        0
              PROC   1368     108      13        1079       0       8     165528        0
             unpcb    320      22     494        1250       0     254     165120        0
        malloc-256    256      92     538        2135       0      62     161280        0
       S VFS Cache    104    1016     388        1319       0     126     146016        0
         filedesc0   1072     107      19        1217       0       8     135072        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-65536  65536       0       2         178       0       1     131072        0
      malloc-65536  65536       0       2           8       0       1     131072        0
      malloc-32768  32768       2       2          16       0       1     131072        0
       malloc-1024   1024     109      19         129       0      16     131072        0
       mbuf_packet    256       7     501         309       0     254     130048        0
       malloc-4096   4096      13      17          41       0       2     122880        0
          ksiginfo    112     101     943         381       0     126     116928        0
      malloc-32768  32768       0       3         129       0       1      98304        0
      malloc-32768  32768       3       0           3       0       1      98304        0
        malloc-256    256     304      71         968       0      62      96000        0
          UMA Kegs    384     230       3         231       0      30      89472        0
          syncache    168       0     528           4       0     254      88704        0
       malloc-8192   8192       8       2          12       0       1      81920        0
        malloc-384    384     150      30         815       0      30      69120        0
        malloc-384    384      85      95         466       0      30      69120        0
        128 Bucket   1024      46      21         270       0      16      68608        0
         malloc-64     64     536     535       21529       0     254      68544        0
        malloc-128    128     311     216         566       0     126      67456        0
             g_bio    440       0     153        9725       0      30      67320        0
           DIRHASH   1024      34      30          38       0      16      65536        0
      malloc-65536  65536       1       0           1       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-4096   4096      12       4          26       0       2      65536        0
         64 Bucket    512      88      40        2195       0      30      65536        0
           VMSPACE    584      81      31        1048       0      16      65408        0
        malloc-256    256     159      96         190       0      62      65280        0
         32 Bucket    256      74     181         485       0      62      65280        0
       malloc-8192   8192       5       2         128       0       1      57344        0
         tcp_inpcb   1304      18      24          84       0       8      54768        0
         malloc-64     64     471     348         690       0     254      52416        0
         udp_inpcb    408      14     112         196       0      30      51408        0
        malloc-256    256      66     129         502       0      62      49920        0
        malloc-256    256      45     150         708       0      62      49920        0
        malloc-256    256      29     166        1623       0      62      49920        0
             NAMEI   1024       0      48       14550       0      16      49152        0
      malloc-16384  16384       2       1           7       0       1      49152        0
      malloc-16384  16384       3       0           3       0       1      49152        0
       malloc-2048   2048       5      19         168       0       8      49152        0
       malloc-2048   2048      12      12          37       0       8      49152        0
       malloc-1024   1024      10      38         526       0      16      49152        0
           pcpu-64     64     506     262         506       0     254      49152        0
            pcpu-8      8    4854     778        5089       0     254      45056        0
             Files     80     293     257        8143       0     126      44000        0
            vnpbuf   2664       0      16           1       0      16      42624        0
       malloc-4096   4096       7       3         486       0       2      40960        0
              pipe    736      25      30         347       0      16      40480        0
         malloc-64     64     120     447        1241       0     254      36288        0
         malloc-64     64     115     452         270       0     254      36288        0
         malloc-64     64     210     357        1299       0     254      36288        0
         malloc-64     64     290     277        1379       0     254      36288        0
         malloc-64     64       7     560         759       0     254      36288        0
        malloc-128    128       9     270          10       0     126      35712        0
        malloc-128    128      14     265          32       0     126      35712        0
        malloc-128    128     133     146         478       0     126      35712        0
        malloc-128    128       1     278          12       0     126      35712        0
     routing nhops    256      30     105          38       0      62      34560        0
           ttyoutq    256      72      63         160       0      62      34560        0
        malloc-384    384      53      37          81       0      30      34560        0
        malloc-384    384      38      52          58       0      30      34560        0
        malloc-256    256      41      94         712       0      62      34560        0
         TURNSTILE    136     201      51         201       0      62      34272        0
             ripcb    376      20      70          66       0      30      33840        0
        SLEEPQUEUE     88     201     183         201       0     126      33792        0
       malloc-8192   8192       2       2           4       0       1      32768        0
       malloc-8192   8192       4       0           4       0       1      32768        0
       malloc-2048   2048       3      13           9       0       8      32768        0
       malloc-2048   2048       8       8          32       0       8      32768        0
       malloc-2048   2048       6      10          28       0       8      32768        0
       malloc-1024   1024       2      30           7       0      16      32768        0
       malloc-1024   1024      12      20        1237       0      16      32768        0
       malloc-1024   1024      20      12          24       0      16      32768        0
       malloc-1024   1024       7      25          35       0      16      32768        0
       malloc-1024   1024       8      24          12       0      16      32768        0
       malloc-1024   1024      11      21         468       0      16      32768        0
        malloc-512    512       1      63          16       0      30      32768        0
        malloc-512    512       2      62          24       0      30      32768        0
        malloc-512    512      11      53         233       0      30      32768        0
        malloc-512    512       2      62          26       0      30      32768        0
        malloc-512    512       5      59          10       0      30      32768        0
        malloc-512    512      13      51          19       0      30      32768        0
        malloc-512    512       0      64          27       0      30      32768        0
            ttyinq    160     135      65         300       0      62      32000        0
            clpbuf   2664       0      12          49       0       4      31968        0
              PGRP    120      26     238          43       0     126      31680        0
        sctp_laddr     48       0     588          14       0     254      28224        0
          rl_entry     48       8     580           8       0     254      28224        0
         malloc-32     32     400     482        1023       0     254      28224        0
         16 Bucket    144      63     133         427       0      62      28224        0
          4 Bucket     48       6     582           9       0     254      28224        0
               AIO    208       1     132          47       0      62      27664        0
            da_ccb    544       0      49        2542       0      16      26656        0
     udplite_inpcb    408       2      61          12       0      30      25704        0
            cpuset    200       8     120          21       0      62      25600        0
       malloc-8192   8192       3       0           3       0       1      24576        0
       malloc-8192   8192       2       1           3       0       1      24576        0
       malloc-4096   4096       3       3         207       0       2      24576        0
       malloc-4096   4096       1       5         129       0       2      24576        0
    ertt_txseginfo     40       2     604         727       0     254      24240        0
               PWD     40      58     548         242       0     254      24240        0
           rtentry    168      33     111          38       0      62      24192        0
          8 Bucket     80      53     247         402       0     126      24000        0
        malloc-384    384       2      58          38       0      30      23040        0
        malloc-384    384      12      48          39       0      30      23040        0
       Mountpoints   2816       2       6           4       0       4      22528        0
         hostcache     64       3     312           3       0     254      20160        0
              ertt     72      18     262          84       0     126      20160        0
         malloc-32     32      43     587          58       0     254      20160        0
         malloc-32     32       3     627          15       0     254      20160        0
         malloc-32     32     194     436         509       0     254      20160        0
         malloc-32     32      37     593         760       0     254      20160        0
         malloc-32     32     130     500       10534       0     254      20160        0
         malloc-32     32      15     615         485       0     254      20160        0
          2 Bucket     32      72     558         484       0     254      20160        0
             KNOTE    160       1     124          93       0      62      20000        0
           cryptop    280       0      70           7       0      30      19600        0
             AIOCB    552       1      34          69       0      16      19320        0
      ktls_session    256       1      74           1       0      62      19200        0
       L VFS Cache    320       0      60          14       0      30      19200        0
        malloc-256    256      13      62          54       0      62      19200        0
            AIOLIO    272       0      70          10       0      30      19040        0
              vmem   1856       2       7           2       0       8      16704        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       0       2          23       0       1      16384        0
       malloc-2048   2048       3       5           3       0       8      16384        0
       malloc-2048   2048       2       6           2       0       8      16384        0
           SMR CPU     32       8     503           8       0     254      16352        0
               ipq     56       0     288           1       0     254      16128        0
         malloc-16     16     333     667         681       0     254      16000        0
   tcp_log_id_node    120       0     132           1       0     126      15840        0
              kenv    258      17      43        1066       0      30      15480        0
      tcp_rack_pcb   1088       1      13           1       0       8      15232        0
            mqnode    416       3      33           3       0      30      14976        0
         domainset     40       1     314           7       0     254      12600        0
        SMR SHARED     24       8     503           8       0     254      12264        0
 tcp_log_id_bucket    176       0      69           1       0      62      12144        0
      vtnet_tx_hdr     24       1     500        1409       0     254      12024        0
         malloc-16     16      21     729          90       0     254      12000        0
         malloc-16     16      37     713          49       0     254      12000        0
         malloc-16     16     188     562        3042       0     254      12000        0
         malloc-16     16      30     720       31772       0     254      12000        0
         malloc-16     16      14     736          68       0     254      12000        0
            itimer    352       0      33          25       0      30      11616        0
            splice    184       0      63           1       0      62      11592        0
       malloc-4096   4096       1       1           1       0       2       8192        0
           pcpu-16     16       8     504           8       0     254       8192        0
         malloc-16     16       1     499           1       0     254       8000        0
       UMA Slabs 1    176      10      12          10       0      62       3872        0
        KMAP ENTRY     96      15      24          27       0       0       3744        0
             md127      8       0       0           0       0     254          0        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    152       0       0           0       0      62          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 fragment node     72       0       0           0       0     126          0        0
          pf frags    232       0       0           0       0      62          0        0
  pf table entries    160       0       0           0       0     254          0        0
pf table entry counters     64       0       0           0       0     254          0        0
pf Ethernet anchors   1240       0       0           0       0      64          0        0
        pf anchors   1664       0       0           0       0      64          0        0
   pf UDP mappings    104       0       0           0       0     126          0        0
   pf source nodes    152       0       0           0       0     254          0        0
     pf state keys     88       0       0           0       0     126          0        0
         pf states    384       0       0           0       0     254          0        0
           pf tags    104       0       0           0       0     126          0        0
          pf mtags    184       0       0           0       0      62          0        0
      tcp_rack_map    128       0       0           0       0     126          0        0
       tcp_bbr_pcb    896       0       0           0       0      16          0        0
       tcp_bbr_map    128       0       0           0       0     126          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
   sctp_asconf_ack     48       0       0           0       0     254          0        0
       sctp_asconf     40       0       0           0       0     254          0        0
sctp_stream_msg_out    112       0       0           0       0     254          0        0
        sctp_readq    152       0       0           0       0     254          0        0
        sctp_chunk    152       0       0           0       0     254          0        0
          tcpreass     48       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    240       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
     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    152       0       0           0       0      62          0        0
   IOMMU_MAP_ENTRY    112       0       0           0       0     126          0        0
            skbuff   1808       0       0           0       0       8          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
        MAC labels     40       0       0           0       0     254          0        0
           nfspbuf   2664       0       0           0       0       4          0        0
            swwbuf   2664       0       0           0       0       2          0        0
            swrbuf   2664       0       0           0       0       4          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    152       0       0           0       0      62          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-16384  16384       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          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     88       0       0           0       0     126          0        0
          UMA Hash    256       0       0           0       0      62          0        0
db> show all tcpcbs/bl

Crashes (897):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/13 19:16 freebsd-src c42bce238abd a066d2bc console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/13 10:07 freebsd-src c42bce238abd a066d2bc console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/12 02:55 freebsd-src e3fa0a22dd37 a066d2bc console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/11 10:48 freebsd-src e3fa0a22dd37 48b27acc console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/11 06:10 freebsd-src a0347b0f3a60 48b27acc console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/11 02:25 freebsd-src a0347b0f3a60 48b27acc console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/10 13:27 freebsd-src cc1e4aae5a67 48b27acc console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/08 05:31 freebsd-src 3f10e5985044 cee4cb10 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/07 09:25 freebsd-src 3f10e5985044 cee4cb10 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/07 00:19 freebsd-src 6f4debc004c3 cee4cb10 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/06 07:53 freebsd-src ced74610217f cee4cb10 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/27 19:53 freebsd-src 39cbfc78b50c e8331348 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/27 04:34 freebsd-src 3e69618d4bfb e8331348 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/27 02:32 freebsd-src 3e69618d4bfb e8331348 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/22 03:35 freebsd-src a8740ba860bf 4fb8ef37 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/21 16:49 freebsd-src 8158b813d90f 52ed5c96 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/21 14:53 freebsd-src 8158b813d90f 52ed5c96 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/14 09:51 freebsd-src 8cd9c39195b5 07e030de console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/14 06:55 freebsd-src 8cd9c39195b5 07e030de console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/13 02:00 freebsd-src 539726e86d69 07e030de console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/10 14:25 freebsd-src 80ca573fc4e6 4e1406b4 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/09 14:23 freebsd-src 8b92a6ad597e 4e1406b4 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/08 15:59 freebsd-src 385796001c41 4e1406b4 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/07 11:43 freebsd-src 36095c942031 4e1406b4 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/06 15:07 freebsd-src 1ca7542a1b31 a6c9c731 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/05 14:38 freebsd-src b8697ac70ebf a6c9c731 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/05 05:37 freebsd-src f999ffdce381 a6c9c731 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/04 16:50 freebsd-src f999ffdce381 686bf657 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/11/03 23:47 freebsd-src 40d216183821 e6c64ba8 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/10/31 18:37 freebsd-src 0837b2ebd570 2c50b6a9 console log report ci-freebsd-main panic: sleeping thread holds tun_mtx
2025/12/08 14:24 freebsd-src 3f10e5985044 fc20f974 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/12/08 10:12 freebsd-src 3f10e5985044 cee4cb10 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/12/07 15:15 freebsd-src 3f10e5985044 cee4cb10 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/29 03:28 freebsd-src 3d91a746380e 01c07bfe console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/25 12:37 freebsd-src b87f6330013f 64219f15 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/24 04:03 freebsd-src 5cc34a83e1cc 4fb8ef37 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/22 11:18 freebsd-src a8740ba860bf 4fb8ef37 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/21 11:39 freebsd-src 8158b813d90f 52ed5c96 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/20 15:56 freebsd-src 896dc30bc9bc 2cc4c24a console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/18 18:42 freebsd-src 8012c61bef3b ef766cd7 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/16 11:31 freebsd-src 07e6bfeae5a1 f7988ea4 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/13 16:35 freebsd-src b19e61f223a1 07e030de console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/13 16:28 freebsd-src b19e61f223a1 07e030de console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/11 07:51 freebsd-src d6f10a5d013f 4e1406b4 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/10 17:54 freebsd-src 978aaa72f319 4e1406b4 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/09 01:54 freebsd-src 335fc09ab8d2 4e1406b4 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/06 21:07 freebsd-src d7a138207fa4 4e1406b4 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/03 13:14 freebsd-src 088ced14a69b 2c50b6a9 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/11/02 16:40 freebsd-src 92a533ed1d3c 2c50b6a9 console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
2025/06/06 11:36 freebsd-src 6d46fd2cbea4 3d899f2c console log report ci-freebsd-i386 panic: sleeping thread holds tun_mtx
* Struck through repros no longer work on HEAD.