syzbot


panic: hold_tcblock is false

Status: fixed on 2022/02/20 16:25
Reported-by: syzbot+cd3c1dd64861b8c200bd@syzkaller.appspotmail.com
Fix commit: e255f0c9fbd2 sctp: make sure new locking requirements are satisfied.
First crash: 1007d, last: 1007d

Sample crash report:
panic: hold_tcblock is false
cpuid = 0
time = 1645341097
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe008fdfc050
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe008fdfc1b0
vpanic() at vpanic+0x2b8/frame 0xfffffe008fdfc290
panic() at panic+0xb5/frame 0xfffffe008fdfc350
sctp_lower_sosend() at sctp_lower_sosend+0x5976/frame 0xfffffe008fdfc740
sctp_sosend() at sctp_sosend+0x72c/frame 0xfffffe008fdfc9e0
sosend() at sosend+0xfc/frame 0xfffffe008fdfca50
kern_sendit() at kern_sendit+0x58a/frame 0xfffffe008fdfcbc0
sendit() at sendit+0x2b0/frame 0xfffffe008fdfcc10
sys_sendto() at sys_sendto+0x182/frame 0xfffffe008fdfcd30
amd64_syscall() at amd64_syscall+0x40c/frame 0xfffffe008fdfcf30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe008fdfcf30
--- syscall (0, FreeBSD ELF64, nosys), rip = 0x2b3d1a, rsp = 0x8211aa9b8, rbp = 0x8211aa9d0 ---
KDB: enter: panic
[ thread pid 779 tid 100105 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x2708c3a(%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         0x5352406408ae3323
rdx         0xdffff7c000000000
rbx                          0
rsp         0xfffffe008fdfc190
rbp         0xfffffe008fdfc1b0
rsi                        0x1
rdi                          0
r8                         0x3
r9                  0xffffffff
r10                          0
r11         0xfffffe0058c276f0
r12         0xfffffe0058c271e0
r13         0xfffffe008fdfc201
r14         0xffffffff82ba1cc0  .str.18
r15         0xffffffff82ba1cc0  .str.18
rip         0xffffffff8176575b  kdb_enter+0x6b
rflags                    0x46
kdb_enter+0x6b: movq    $0,0x2708c3a(%rip)
db> show proc
Process 779 (syz-executor9895312) at 0xfffffe008fed4000:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 777 at 0xfffffe008fed0000
 ABI: FreeBSD ELF64
 flag: 0x10004000  flag2: 0
 arguments: ./syz-executor989531287
 reaper: 0xfffffe0053dda000 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe0092d75000
   (map 0xfffffe0092d75000)
   (map.pmap 0xfffffe0092d750c0)
   (pmap 0xfffffe0092d75128)
 threads: 1
100105                   Run     CPU 0                       syz-executor9895312
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  779   777   777     0  R       CPU 0                       syz-executor9895312
  777   775   777     0  Ss      pause   0xfffffe008fed00b0  csh
  775   688   775     0  Ss      select  0xfffffe0092651740  sshd
  754     1   754     0  Ss+     ttyin   0xfffffe0057466cb0  getty
  753     1   753     0  Ss+     ttyin   0xfffffe00579a6cb0  getty
  752     1   752     0  Ss+     ttyin   0xfffffe0057465cb0  getty
  751     1   751     0  Ss+     ttyin   0xfffffe00579a70b0  getty
  750     1   750     0  Ss+     ttyin   0xfffffe00579a74b0  getty
  749     1   749     0  Ss+     ttyin   0xfffffe00579a78b0  getty
  748     1   748     0  Ss+     ttyin   0xfffffe00579a7cb0  getty
  747     1   747     0  Ss+     ttyin   0xfffffe00579a80b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe00579a84b0  getty
  744     1    18     0  S+      piperd  0xfffffe0058b4f000  logger
  743   742    18     0  S+      nanslp  0xffffffff83e3ba81  sleep
  742     1    18     0  S+      wait    0xfffffe009294da90  sh
  692     1   692     0  Ss      nanslp  0xffffffff83e3ba81  cron
  688     1   688     0  Ss      select  0xfffffe0092652340  sshd
  501     1   501     0  Ss      select  0xfffffe00926524c0  syslogd
  430     1   430     0  Ss      select  0xfffffe00578776c0  devd
  429     1   429    65  Ss      select  0xfffffe0057877640  dhclient
  344     1   344     0  Ss      select  0xfffffe0057877a40  dhclient
  341     1   341     0  Ss      select  0xfffffe00926526c0  dhclient
   17     0     0     0  DL      syncer  0xffffffff83f61260  [syncer]
   16     0     0     0  DL      vlruwt  0xfffffe0056f7ba90  [vnlru]
   15     0     0     0  DL      (threaded)                  [bufdaemon]
100080                   D       psleep  0xffffffff83f5f860  [bufdaemon]
100083                   D       -       0xffffffff83211f80  [bufspacedaemon-0]
100096                   D       sdflush 0xfffffe0057464ce8  [/ worker]
    9     0     0     0  DL      psleep  0xffffffff83f932c0  [vmdaemon]
    8     0     0     0  DL      (threaded)                  [pagedaemon]
100078                   D       psleep  0xffffffff83f87178  [dom0]
100081                   D       launds  0xffffffff83f87184  [laundry: dom0]
100082                   D       umarcl  0xffffffff81e9b4a0  [uma]
    7     0     0     0  DL      -       0xffffffff83bf7a08  [rand_harvestq]
    6     0     0     0  DL      pftm    0xffffffff84ad2530  [pf purge]
    5     0     0     0  DL      waiting 0xffffffff8490d560  [sctp_iterator]
    4     0     0     0  DL      (threaded)                  [cam]
100045                   D       -       0xffffffff83a99940  [doneq0]
100046                   D       -       0xffffffff83a998c0  [async]
100077                   D       -       0xffffffff83a99740  [scanner]
   14     0     0     0  DL      seqstat 0xfffffe0053f88c88  [sequencer 00]
    3     0     0     0  DL      (threaded)                  [crypto]
100041                   D       crypto_ 0xffffffff83f829a0  [crypto]
100042                   D       crypto_ 0xfffffe0053c8ad30  [crypto returns 0]
100043                   D       crypto_ 0xfffffe0053c8ad80  [crypto returns 1]
   13     0     0     0  DL      (threaded)                  [geom]
100036                   D       -       0xffffffff83e111c0  [g_event]
100037                   D       -       0xffffffff83e111e0  [g_up]
100038                   D       -       0xffffffff83e11200  [g_down]
    2     0     0     0  WL      (threaded)                  [clock]
100030                   I                                   [clock (0)]
100031                   I                                   [clock (1)]
   12     0     0     0  WL      (threaded)                  [intr]
100010                   I                                   [swi6: task queue]
100011                   I                                   [swi6: Giant taskq]
100018                   I                                   [swi5: fast taskq]
100029                   I                                   [swi1: netisr 0]
100032                   I                                   [swi3: busdma]
100033                   I                                   [swi1: hpts]
100034                   I                                   [swi1: hpts]
100047                   I                                   [irq24: virtio_pci0]
100048                   I                                   [irq25: virtio_pci0]
100049                   I                                   [irq26: virtio_pci0]
100050                   I                                   [irq27: virtio_pci0]
100051                   I                                   [irq28: virtio_pci1]
100052                   I                                   [irq29: virtio_pci1]
100053                   I                                   [irq30: virtio_pci1]
100054                   I                                   [irq31: virtio_pci1]
100055                   I                                   [irq32: virtio_pci1]
100060                   I                                   [irq33: virtio_pci2]
100061                   I                                   [irq34: virtio_pci2]
100062                   I                                   [irq35: virtio_pci2]
100064                   I                                   [irq1: atkbd0]
100065                   I                                   [irq12: psm0]
100066                   I                                   [swi0: uart uart++]
100070                   I                                   [swi1: pf send]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   Run     CPU 1                       [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffffe0053dda000  [init]
   10     0     0     0  DL      audit_w 0xffffffff83f834a0  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff83e11c00  [swapper]
100005                   D       -       0xfffffe0053e01000  [if_config_tqg_0]
100006                   D       -       0xfffffe0053e00e00  [softirq_0]
100007                   D       -       0xfffffe0053e00d00  [softirq_1]
100008                   D       -       0xfffffe0053e00c00  [if_io_tqg_0]
100009                   D       -       0xfffffe0053e00b00  [if_io_tqg_1]
100012                   D       -       0xfffffe000796d200  [aiod_kick taskq]
100013                   D       -       0xfffffe000796d000  [inm_free taskq]
100014                   D       -       0xfffffe000796cd00  [linuxkpi_irq_wq]
100015                   D       -       0xfffffe000796cb00  [in6m_free taskq]
100016                   D       -       0xfffffe000796c900  [deferred_unmount ta]
100017                   D       -       0xfffffe000796c700  [thread taskq]
100019                   D       -       0xfffffe000796c300  [kqueue_ctx taskq]
100020                   D       -       0xfffffe000796c100  [pci_hp taskq]
100021                   D       -       0xfffffe000796be00  [linuxkpi_short_wq_0]
100022                   D       -       0xfffffe000796be00  [linuxkpi_short_wq_1]
100023                   D       -       0xfffffe000796be00  [linuxkpi_short_wq_2]
100024                   D       -       0xfffffe000796be00  [linuxkpi_short_wq_3]
100025                   D       -       0xfffffe000796b900  [linuxkpi_long_wq_0]
100026                   D       -       0xfffffe000796b900  [linuxkpi_long_wq_1]
100027                   D       -       0xfffffe000796b900  [linuxkpi_long_wq_2]
100028                   D       -       0xfffffe000796b900  [linuxkpi_long_wq_3]
100035                   D       -       0xfffffe0053ed0200  [firmware taskq]
100039                   D       -       0xfffffe0053ecfc00  [crypto_0]
100040                   D       -       0xfffffe0053ecfc00  [crypto_1]
100056                   D       -       0xfffffe0053eced00  [vtnet0 rxq 0]
100057                   D       -       0xfffffe0053ecec00  [vtnet0 txq 0]
100058                   D       -       0xfffffe0053eceb00  [vtnet0 rxq 1]
100059                   D       -       0xfffffe0053ecea00  [vtnet0 txq 1]
100063                   D       vtbslp  0xfffffe0053fde400  [virtio_balloon]
100067                   D       -       0xffffffff82ba77a0  [deadlkres]
100071                   D       -       0xfffffe005787d100  [acpi_task_0]
100072                   D       -       0xfffffe005787d100  [acpi_task_1]
100073                   D       -       0xfffffe005787d100  [acpi_task_2]
100074                   D       -       0xfffffe000796e200  [mca taskq]
100076                   D       -       0xfffffe0053ecf500  [CAM taskq]
db> show all locks
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
          tcp_hpts            6         4801K            6
            devbuf         4217         4323K         4242
         sysctloid        35306         2080K        35377
             vtbuf           24         1968K           46
              kobj          326         1304K          487
            newblk          706         1201K          718
          vfscache            3         1025K            3
               pcb           24          541K           44
          inodedep           49          530K           71
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
            acpica         1674          184K        56396
           subproc           98          182K          838
         vnet_data            1          168K            1
              vmem            3          146K            5
           tidhash            3          141K            3
            linker          358          134K          386
           pagedep           14          132K           18
        tfo_ccache            1          128K            1
               sem            4          106K            4
            DEVFS1          105          105K          114
               bus          988           81K         3441
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          511           64K          511
           kdtrace          163           34K          903
              umtx          264           33K          264
              temp           17           33K         1606
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          124           31K          134
               msg            4           30K            4
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
        DEVFS_RULE           56           20K           56
               BPF           10           18K           10
         ufs_mount            4           17K            5
              proc            3           17K            3
               tty           16           16K           16
           ithread          100           16K          100
            bus-sc           34           15K         1651
            KTRACE          100           13K          100
              kenv           95           12K           95
      eventhandler          133           12K          133
            ifaddr           30           12K           32
              rman           88           11K          429
              GEOM           61           11K          490
          routetbl           50           11K          176
         CAM queue            5           11K         1528
         bmsafemap            4            9K           40
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K            1
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
              cred           31            8K          234
         pfs_nodes           20            8K           20
     audit_evclass          237            8K          296
         taskqueue           63            7K           63
            sglist            5            7K            5
           CAM DEV            3            6K          510
       ufs_dirhash           24            5K           24
               UMA          272            5K          272
            dirrem           17            5K           28
            plimit           17            5K          322
                vt           11            5K           11
             ifnet            3            5K            3
           memdesc            1            4K            1
               MCA           32            4K           32
          filedesc            1            4K            1
             evdev            4            4K            4
           acpisem           28            4K           28
             hhook           15            4K           17
       ether_multi           40            4K           50
            diradd           25            4K           36
           lltable           11            4K           11
          pf_ifnet            5            3K            6
         in6_multi           25            3K           25
          terminal           11            3K           11
         sctp_atcl            7            3K            8
           session           20            3K           31
            kqueue           40            3K          782
           pwddesc           40            3K          780
           uidinfo            3            3K            8
         proc-args           62            3K         1720
         sctp_stro            2            2K            2
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
         ipsec-saq            2            2K            2
             selfd           27            2K        11040
            Unitno           27            2K           39
           CAM XPT           22            2K          543
             lockf           15            2K           22
               msi           12            2K           12
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
             clone            9            2K            9
         sctp_stri            2            1K            2
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
       vnodemarker            2            1K            8
      NFSD session            1            1K            1
        CAM periph            4            1K          271
            select            7            1K           29
             ipsec            3            1K            3
          indirdep            3            1K            3
             nhops            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           89
          pci_link           10            1K           10
          sctp_ifa            5            1K            6
            crypto            4            1K            4
            ip6ndp            4            1K            5
 encap_export_host           12            1K           12
         newdirblk            4            1K            8
             mkdir            4            1K           16
          in_multi            2            1K            4
              pfil            4            1K            4
              cdev            2            1K            2
         sctp_atky            9            1K            9
    chacha20random            1            1K            1
               osd            7            1K           18
       inpcbpolicy           10            1K          139
          sctp_ifn            2            1K            6
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
            DEVFSP            4            1K            9
             DEVFS            9            1K           10
               mld            2            1K            2
              igmp            2            1K            2
            vnodes            1            1K            1
           CAM SIM            2            1K            2
            feeder            7            1K            7
           tcpfunc            3            1K            3
            CC Mem            3            1K            7
        loginclass            3            1K            7
            prison            6            1K            6
       lkpikmalloc            5            1K            6
        aesni_data            2            1K            2
         cryptodev            2            1K           49
          nexusdev            8            1K            8
            apmdev            1            1K            1
          atkbddev            2            1K            2
     CAM dev queue            2            1K            2
 CAM I/O Scheduler            1            1K            1
          CAM path            4            1K         1034
          procdesc            1            1K            6
          pmchooks            1            1K            1
         sctp_athm            7            1K            8
            soname            4            1K         3473
          filecaps            4            1K           66
               tun            3            1K            3
          sctp_vrf            1            1K            1
          sctp_map            4            1K            4
              vnet            1            1K            1
           entropy            2            1K           35
               pmc            1            1K            1
          acpiintr            1            1K            1
              cpus            2            1K            2
          freework            1            1K           26
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          p1003.1b            1            1K            1
            ipcomp            0            0K            0
               esp            0            0K            0
                ah            0            0K            0
          pf_table            0            0K            0
           pf_rule            0            0K            0
           pf_altq            0            0K            0
           pf_osfp            0            0K            0
           pf_temp            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K            1
         sctp_iter            0            0K            4
         sctp_mvrf            0            0K            0
         sctp_timw            0            0K            0
         sctp_cpal            0            0K            0
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
         sctp_athi            0            0K            0
         sctp_a_it            0            0K            4
         sctp_aadr            0            0K            0
            mqdata            0            0K            0
            tcp_do            0            0K            0
           tcp_fsb            0            0K            0
           filemon            0            0K            0
     NFSCL flayout            0            0K            0
      NFSCL layout            0            0K            0
        madt_table            0            0K            2
          smartpqi            0            0K            0
     NFSD rollback            0            0K            0
      NFSCL diroff            0            0K            0
       NEWdirectio            0            0K            0
               ixl            0            0K            0
        NEWNFSnode            0            0K            0
         NFSCL lck            0            0K            0
      NFSCL lckown            0            0K            0
      NFSCL client            0            0K            0
       NFSCL deleg            0            0K            0
        NFSCL open            0            0K            0
       NFSCL owner            0            0K            0
        ice-resmgr            0            0K            0
         ice-osdep            0            0K            0
               ice            0            0K            0
              iavf            0            0K            0
             axgbe            0            0K            0
            NFS fh            0            0K            0
           NFS req            0            0K            0
     NFSD usrgroup            0            0K            0
       NFSD string            0            0K            0
       NFSD V4lock            0            0K            0
      NFSD V4state            0            0K            0
     NFSD srvcache            0            0K            0
       msdosfs_fat            0            0K            0
          xen_intr            0            0K            0
     msdosfs_mount            0            0K            0
      msdosfs_node            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            bounce            0            0K            0
            busdma            0            0K            0
            qpidrv            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
            DEVFS4            0            0K            0
              isci            0            0K            0
      iommu_dmamap            0            0K            0
     hyperv_socket            0            0K            0
           bxe_ilt            0            0K            0
            DEVFS2            0            0K            0
            xenbus            0            0K            0
            gntdev            0            0K            0
       privcmd_dev            0            0K            0
        evtchn_dev            0            0K            0
     vm_fictitious            0            0K            0
          xenstore            0            0K            0
         scsi_pass            0            0K            0
         ciss_data            0            0K            0
               xnb            0            0K            0
              xbbd            0            0K            0
               xbd            0            0K            0
           Balloon            0            0K            0
          sysmouse            0            0K            0
            vtfont            0            0K            0
           UMAHash            0            0K            0
         BACKLIGHT            0            0K            0
           ath_hal            0            0K            0
         vm_pgdata            0            0K            0
           jblocks            0            0K            0
          savedino            0            0K           15
          sentinel            0            0K            0
            jfsync            0            0K            0
            jtrunc            0            0K            0
             sbdep            0            0K            2
           jsegdep            0            0K            0
              jseg            0            0K            0
         jfreefrag            0            0K            0
          jfreeblk            0            0K            0
           jnewblk            0            0K            0
            jmvref            0            0K            0
           jremref            0            0K            0
           jaddref            0            0K            0
           freedep            0            0K            0
          freefile            0            0K            9
          freeblks            0            0K           25
          freefrag            0            0K            1
        allocindir            0            0K            0
       allocdirect            0            0K            0
          ufs_trim            0            0K            0
           mactemp            0            0K            0
     audit_trigger            0            0K            0
 audit_pipe_presel            0            0K            0
     audit_pipeent            0            0K            0
        audit_pipe            0            0K            0
      audit_evname            0            0K            0
         audit_bsm            0            0K            0
      audit_gidset            0            0K            0
        audit_text            0            0K            0
        audit_path            0            0K            0
        audit_data            0            0K            0
        audit_cred            0            0K            0
            athdev            0            0K            0
           ata_pci            0            0K            0
           ata_dma            0            0K            0
       ata_generic            0            0K            0
            pvscsi            0            0K            0
           scsi_da            0            0K           69
            ata_da            0            0K            0
           scsi_ch            0            0K            0
           scsi_cd            0            0K            0
       AHCI driver            0            0K            0
            USBdev            0            0K            0
               USB            0            0K            0
          ktls_ocf            0            0K            0
               agp            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
      MLX5E_TLS_RX            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
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
          MLX5DUMP            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
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            lkpifw            0            0K            0
         lkpi80211            0            0K            0
               NLM            0            0K            0
    ipsec-spdcache            0            0K            0
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            ip6opt            0            0K            3
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             frag6            0            0K            0
            tcplog            0            0K            0
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               LRO            0            0K            0
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              ipid            0            0K            0
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      80211ratectl            0            0K            0
        80211power            0            0K            0
       80211nodeie            0            0K            0
         80211node            0            0K            0
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      80211mesh_rt            0            0K            0
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              zlib            0            0K            0
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            statfs            0            0K          195
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       export_host            0            0K            0
        cl_savebuf            0            0K            4
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              ac97            0            0K            0
             hdacc            0            0K            0
              hdac            0            0K            0
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          tempbuff            0            0K            0
ag_tgt_map_t malloc            0            0K            0
ag_slr_map_t malloc            0            0K            0
lDevFlags * malloc            0            0K            0
tiDeviceHandle_t * malloc            0            0K            0
ag_portal_data_t malloc            0            0K            0
ag_device_t malloc            0            0K            0
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8775     623       15067       0     254   38494208        0
              mbuf    256    9033     629       18103       0     254    2473472        0
              pbuf   2624       0     794           0       0       2    2083456        0
          BUF TRIE    144     183   11605         513       0      62    1697472        0
        malloc-384    384    4117      53        4458       0      30    1601280        0
        malloc-128    128   11682     191       11735       0     126    1519744        0
       malloc-4096   4096     326       2         490       0       2    1343488        0
       UMA Slabs 0    112   10539       3       10539       0     126    1180704        0
         sctp_asoc   2288       2     508           2       0     254    1166880        0
      mbuf_cluster   2048     508       0         508       0     254    1040384        0
         vmem btag     56   16465      62       16465       0     254     925512        0
           sctp_ep   1208       3     507           3       0     254     616080        0
         FFS inode   1160     499      19         508       0       8     600880        0
             tcpcb   1104       3     508           7       0     254     564144        0
        RADIX NODE    144    3368     183       20099       0      62     511344        0
            socket    960      21     487        1338       0     254     487680        0
      malloc-65536  65536       4       3         186       0       1     458752        0
         VM OBJECT    264    1411     119       24452       0      30     403920        0
            lkpimm    168       1    2327           1       0      62     391104        0
          lkpicurr    168       2    2326           2       0      62     391104        0
        sctp_raddr    736       2     515           2       0     254     380512        0
        256 Bucket   2048     130      18        1023       0       8     303104        0
         malloc-64     64    3870     225        3909       0     254     262080        0
             VNODE    448     529      47         540       0      30     258048        0
        malloc-256    256     976      29        1289       0      62     257280        0
         malloc-16     16   14613     387       14685       0     254     240000        0
            THREAD   1808     122      10         122       0       8     238656        0
            DEVCTL   1024       0     220         126       0       0     225280        0
         MAP ENTRY     96    1560     456       84326       0     126     193536        0
         UMA Zones    768     244       0         244       0      16     187392        0
         malloc-32     32    5318     352        5386       0     254     181440        0
       malloc-4096   4096      40       4         782       0       2     180224        0
        malloc-128    128    1215     180       26330       0     126     178560        0
       malloc-1024   1024     121      23        1193       0      16     147456        0
       FFS2 dinode    256     499      71         508       0      62     145920        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-65536  65536       1       1           9       0       1     131072        0
             unpcb    256       7     503        1179       0     254     130560        0
       mbuf_packet    256       1     507          83       0     254     130048        0
       S VFS Cache    104     966     204        1006       0     126     121680        0
     FPU_save_area    832     124      20         136       0      16     119808        0
          ksiginfo    112      44    1000          59       0     126     116928        0
        malloc-128    128     716     183        1760       0     126     115072        0
      malloc-16384  16384       5       2         180       0       1     114688        0
        malloc-128    128     514     261        3837       0     126      99200        0
      malloc-32768  32768       0       3         120       0       1      98304        0
          UMA Kegs    384     230       3         230       0      30      89472        0
        128 Bucket   1024      45      38         481       0      16      84992        0
           VMSPACE   2552      23      10         764       0       4      84216        0
       malloc-8192   8192       6       4         136       0       1      81920        0
       malloc-4096   4096      17       3         652       0       2      81920        0
              PROC   1352      39      18         779       0       8      77064        0
       malloc-8192   8192       9       0           9       0       1      73728        0
             g_bio    408       0     180        4478       0      30      73440        0
         malloc-64     64     574     497        1771       0     254      68544        0
         malloc-64     64     520     551        1615       0     254      68544        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
       malloc-2048   2048       5      27         521       0       8      65536        0
        malloc-256    256     181      74         208       0      62      65280        0
         filedesc0   1072      40      16         780       0       8      60032        0
         64 Bucket    512      64      40        1636       0      30      53248        0
         malloc-64     64     296     523        2308       0     254      52416        0
         32 Bucket    256      59     136        7143       0      62      49920        0
           DIRHASH   1024      34      14          34       0      16      49152        0
             NAMEI   1024       0      48       12227       0      16      49152        0
       malloc-2048   2048       5      19         720       0       8      49152        0
       malloc-1024   1024      14      34         522       0      16      49152        0
          syncache    168       0     264           5       0     254      44352        0
            clpbuf   2624       0      16          22       0      16      41984        0
       malloc-8192   8192       5       0           5       0       1      40960        0
        sctp_chunk    152       2     258           2       0     254      39520        0
       Mountpoints   2752       2      12           2       0       4      38528        0
         udp_inpcb    424       6      84         128       0      30      38160        0
            pcpu-8      8    4220     388        4248       0     254      36864        0
         malloc-64     64       4     563       13328       0     254      36288        0
         malloc-64     64     164     403       11201       0     254      36288        0
         malloc-64     64       4     563          21       0     254      36288        0
         malloc-64     64       2     565           6       0     254      36288        0
        malloc-128    128      77     202          83       0     126      35712        0
        malloc-128    128       2     277         143       0     126      35712        0
        malloc-128    128      84     195         136       0     126      35712        0
        malloc-128    128      16     263         275       0     126      35712        0
     routing nhops    256      10     125          17       0      62      34560        0
           ttyoutq    256      72      63         160       0      62      34560        0
        malloc-384    384      79      11          81       0      30      34560        0
        malloc-384    384      62      28          94       0      30      34560        0
        malloc-384    384      62      28          62       0      30      34560        0
        malloc-256    256      14     121         472       0      62      34560        0
        malloc-256    256      26     109          68       0      62      34560        0
        malloc-256    256      40      95        1034       0      62      34560        0
        malloc-256    256      11     124          15       0      62      34560        0
        malloc-256    256      41      94         246       0      62      34560        0
        malloc-256    256      10     125         521       0      62      34560        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
       malloc-8192   8192       2       2           4       0       1      32768        0
       malloc-2048   2048       3      13           3       0       8      32768        0
       malloc-2048   2048       5      11          91       0       8      32768        0
       malloc-2048   2048       9       7          10       0       8      32768        0
       malloc-1024   1024       3      29           7       0      16      32768        0
       malloc-1024   1024       4      28           7       0      16      32768        0
       malloc-1024   1024      19      13          39       0      16      32768        0
        malloc-512    512       4      60         180       0      30      32768        0
        malloc-512    512       9      55           9       0      30      32768        0
        malloc-512    512       2      62           3       0      30      32768        0
           pcpu-64     64     491      21         491       0     254      32768        0
sctp_stream_msg_out    112       1     287           1       0     254      32256        0
            ttyinq    160     135      65         300       0      62      32000        0
            cpuset    104       7     272           7       0     126      29016        0
         malloc-32     32     262     620         517       0     254      28224        0
         16 Bucket    144      40     156         233       0      62      28224        0
          4 Bucket     48       6     582          49       0     254      28224        0
         tcp_inpcb    424       3      60           7       0      30      26712        0
             ripcb    424       1      62           4       0      30      26712        0
            da_ccb    544       0      49        1240       0      16      26656        0
              pipe    744       7      28         284       0      16      26040        0
         TURNSTILE    136     133      56         133       0      62      25704        0
       malloc-4096   4096       2       4         198       0       2      24576        0
       malloc-4096   4096       6       0           6       0       2      24576        0
       malloc-4096   4096       6       0           6       0       2      24576        0
           rtentry    176      13     125          17       0      62      24288        0
              PGRP     88      20     256          31       0     126      24288        0
    ertt_txseginfo     40       1     605         250       0     254      24240        0
          rl_entry     40      36     570          36       0     254      24240        0
             Files     80      73     227        6582       0     126      24000        0
          8 Bucket     80      35     265         228       0     126      24000        0
        malloc-384    384       7      53          28       0      30      23040        0
        SLEEPQUEUE     88     133     123         133       0     126      22528        0
         hostcache     64       1     314           1       0     254      20160        0
             udpcb     32       6     624         128       0     254      20160        0
   udp_inpcb ports     32       3     627          40       0     254      20160        0
              ertt     72       3     277           7       0     126      20160        0
               PWD     32      10     620         100       0     254      20160        0
         malloc-32     32       9     621          23       0     254      20160        0
         malloc-32     32     227     403        1126       0     254      20160        0
         malloc-32     32      30     600        2768       0     254      20160        0
         malloc-32     32      12     618          25       0     254      20160        0
         malloc-32     32      68     562        1658       0     254      20160        0
         malloc-32     32      14     616          20       0     254      20160        0
          2 Bucket     32      49     581         294       0     254      20160        0
         malloc-16     16     510     740        2990       0     254      20000        0
 epoch_record pcpu    256       4      60           4       0      62      16384        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-8192   8192       2       0           2       0       1      16384        0
       malloc-2048   2048       3       5           3       0       8      16384        0
       malloc-2048   2048       2       6           2       0       8      16384        0
       malloc-2048   2048       1       7           3       0       8      16384        0
       malloc-1024   1024       8       8           8       0      16      16384        0
       malloc-1024   1024       1      15           1       0      16      16384        0
        malloc-512    512       2      30           2       0      30      16384        0
        malloc-512    512       0      32           1       0      30      16384        0
        malloc-512    512       1      31           1       0      30      16384        0
        malloc-512    512       2      30           8       0      30      16384        0
           SMR CPU     32       7     504           7       0     254      16352        0
        sctp_laddr     48       2     334           6       0     254      16128        0
              kenv    258      15      45        1029       0      30      15480        0
            mqnode    416       3      33           3       0      30      14976        0
              vmem   1856       1       7           1       0       8      14848        0
        SMR SHARED     24       7     504           7       0     254      12264        0
   tcp_inpcb ports     32       1     377           1       0     254      12096        0
             KNOTE    160       0      75           8       0      62      12000        0
         malloc-16     16       8     742         201       0     254      12000        0
         malloc-16     16      21     729          60       0     254      12000        0
         malloc-16     16      26     724       25650       0     254      12000        0
         malloc-16     16       8     742         120       0     254      12000        0
         malloc-16     16      59     691          81       0     254      12000        0
        malloc-384    384       1      29           1       0      30      11520        0
        malloc-384    384      27       3          27       0      30      11520        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-4096   4096       1       1           1       0       2       8192        0
       malloc-4096   4096       1       1           1       0       2       8192        0
           pcpu-16     16      14     498          14       0     254       8192        0
         malloc-16     16       5     495           7       0     254       8000        0
      vtnet_tx_hdr     24       0     167        2106       0     254       4008        0
       UMA Slabs 1    176       8      14           8       0      62       3872        0
        KMAP ENTRY     96      12      27          14       0       0       3744        0
       FFS1 dinode    128       0       0           0       0     126          0        0
           ada_ccb    272       0       0           0       0      30          0        0
             swblk    136       0       0           0       0      62          0        0
          swpctrie    144       0       0           0       0      62          0        0
   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_rack_pcb    896       0       0           0       0      16          0        0
      tcp_rack_map    120       0       0           0       0     126          0        0
       tcp_bbr_pcb    832       0       0           0       0      16          0        0
       tcp_bbr_map    128       0       0           0       0     126          0        0
               ipq     56       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     72       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
           tcp_log    416       0       0           0       0     254          0        0
          tcpreass     48       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_readq    152       0       0           0       0     254          0        0
       ripcb ports     32       0       0           0       0     254          0        0
udplite_inpcb ports     32       0       0           0       0     254          0        0
     udplite_inpcb    424       0       0           0       0      30          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
            itimer    352       0       0           0       0      30          0        0
            AIOLIO    272       0       0           0       0      30          0        0
             AIOCB    552       0       0           0       0      16          0        0
              AIOP     32       0       0           0       0     254          0        0
               AIO    208       0       0           0       0      62          0        0
        mqnotifier    216       0       0           0       0      62          0        0
            mvdata     64       0       0           0       0     254          0        0
            mqueue    248       0       0           0       0      62          0        0
        TMPFS node    224       0       0           0       0      62          0        0
           NCLNODE    608       0       0           0       0      16          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
       L VFS Cache    320       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
           cryptop    280       0       0           0       0      30          0        0
  linux_dma_object     32       0       0           0       0     254          0        0
  linux_dma_pctrie    144       0       0           0       0      62          0        0
   IOMMU_MAP_ENTRY    120       0       0           0       0     126          0        0
    mbuf_jumbo_16k  16384       0       0           0       0     254          0        0
     mbuf_jumbo_9k   9216       0       0           0       0     254          0        0
      audit_record   1280       0       0           0       0       8          0        0
         domainset     40       0       0           0       0     254          0        0
        MAC labels     40       0       0           0       0     254          0        0
            vnpbuf   2624       0       0           0       0      64          0        0
            mdpbuf   2624       0       0           0       0       3          0        0
           nfspbuf   2624       0       0           0       0      16          0        0
            swwbuf   2624       0       0           0       0       8          0        0
            swrbuf   2624       0       0           0       0      16          0        0
          umtx_shm     88       0       0           0       0     126          0        0
           umtx pi     96       0       0           0       0     126          0        0
rangeset pctrie nodes    144       0       0           0       0      62          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          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 (468):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/02/20 07:13 freebsd-src a4a31271cc7a 3cd800e4 console log report syz C ci-freebsd-main panic: hold_tcblock is false
2022/02/20 06:11 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 05:14 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 04:45 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 04:11 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 03:57 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 03:16 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 03:02 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:47 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:47 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:47 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:45 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:44 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:43 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:42 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:40 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:39 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:39 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:38 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:37 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:37 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:35 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:33 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:33 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:33 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:32 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:30 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:30 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:30 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:29 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 02:13 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-main panic: hold_tcblock is false
2022/02/20 10:19 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 09:42 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 09:11 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 08:26 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 07:38 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 06:57 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 06:25 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 05:55 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 05:40 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 05:28 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 05:00 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 04:28 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 03:42 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
2022/02/20 03:31 freebsd-src a4a31271cc7a 3cd800e4 console log report ci-freebsd-i386 panic: hold_tcblock is false
* Struck through repros no longer work on HEAD.