syzbot


panic: Counter goes negative (2)

Status: auto-closed as invalid on 2021/05/05 23:11
Reported-by: syzbot+681e7e222bdb2df06d1f@syzkaller.appspotmail.com
First crash: 870d, last: 849d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
freebsd panic: Counter goes negative C 2 1538d 1538d 1/2 fixed on 2019/03/24 20:47
freebsd panic: Counter goes negative (3) C 14 41d 455d 0/2 upstream: reported C repro on 2022/03/05 12:47

Sample crash report:
panic: Counter goes negative
cpuid = 1
time = 1612480289
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0051fc0560
vpanic() at vpanic+0x1c7/frame 0xfffffe0051fc05c0
panic() at panic+0x43/frame 0xfffffe0051fc0620
sctp_sorecvmsg() at sctp_sorecvmsg+0x1780/frame 0xfffffe0051fc0760
sctp_soreceive() at sctp_soreceive+0x25f/frame 0xfffffe0051fc0970
soreceive() at soreceive+0xb9/frame 0xfffffe0051fc09d0
dofileread() at dofileread+0xd3/frame 0xfffffe0051fc0a30
sys_read() at sys_read+0x10c/frame 0xfffffe0051fc0ab0
ia32_syscall() at ia32_syscall+0x237/frame 0xfffffe0051fc0bf0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xfbffcf78
KDB: enter: panic
[ thread pid 28865 tid 132358 ]
Stopped at      kdb_enter+0x67: movq    $0,0x1450bae(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                           0
rax                       0x12
rcx         0xfffffe008a000000
rdx                    0x3ffff
rbx                          0
rsp         0xfffffe0051fc0540
rbp         0xfffffe0051fc0560
rsi                    0x40001
rdi         0xffffffff81117ef6  vprintf+0x176
r8                           0
r9                  0xffffffff
r10         0xfffffe00037b07dc
r11         0xfffffe0088ac1110
r12         0xffffffff82067650  ddb_dbbe
r13                          0
r14         0xffffffff819c0480
r15         0xffffffff819c0480
rip         0xffffffff8110eed7  kdb_enter+0x67
rflags                0x200086  kernload+0x86
kdb_enter+0x67: movq    $0,0x1450bae(%rip)
db> show proc
Process 28865 (syz-executor.1) at 0xfffff800184e6528:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 784 at 0xfffff800183db528
 ABI: FreeBSD ELF32
 flag: 0x10000080  flag2: 0
 arguments: /root/syz-executor.1
 reaper: 0xfffff8000448b528 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe00889a5000
   (map 0xfffffe00889a5000)
   (map.pmap 0xfffffe00889a50c0)
   (pmap 0xfffffe00889a5120)
 threads: 3
100678                   Run     CPU 0                       syz-executor.1
132358                   Run     CPU 1                       syz-executor.1
132361                   D       so_rcv_ 0xfffff80019b90168  syz-executor.1
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
28865   784   784     0  R       (threaded)                  syz-executor.1
100678                   Run     CPU 0                       syz-executor.1
132358                   Run     CPU 1                       syz-executor.1
132361                   D       so_rcv_ 0xfffff80019b90168  syz-executor.1
28860   783   783     0  S       (threaded)                  syz-executor.0
100614                   S       nanslp  0xffffffff825331e1  syz-executor.0
132349                   S       connec  0xfffff80019c100e0  syz-executor.0
132350                   S       uwait   0xfffff80018e5f000  syz-executor.0
 9389     1  9389    65  Ss      select  0xfffff800191d2740  dhclient
 7099     1  7099     0  Ss      select  0xfffff8001851c1c0  dhclient
 7096     1  7096     0  Ss      select  0xfffff8001851c140  dhclient
 7077     1  7077    65  Ss      select  0xfffff8001851c940  dhclient
 5212     1  5212     0  Ss      select  0xfffff800191214c0  dhclient
 5203     1  5203     0  Ss      select  0xfffff80019121340  dhclient
 5184     1  5184    65  Ss      select  0xfffff8001913c8c0  dhclient
 3980     1  3980     0  Ss      select  0xfffff8001851c5c0  dhclient
 3972     1  3972     0  Ss      select  0xfffff8001913c840  dhclient
 3938     1  3938    65  Ss      select  0xfffff8001913c6c0  dhclient
 1317     1  1317     0  Ss      select  0xfffff8001851c8c0  dhclient
 1314     1  1314     0  Ss      select  0xfffff8001851c6c0  dhclient
  865   780   865     0  Ss      piperd  0xfffff80018cd55d0  syz-executor.2
  839   780   839     0  Ss      piperd  0xfffff800189f35d0  syz-executor.3
  784   780   784     0  Ss      nanslp  0xffffffff825331e1  syz-executor.1
  783   780   783     0  Ss      nanslp  0xffffffff825331e1  syz-executor.0
  780   778   778     0  S       (threaded)                  syz-fuzzer
100095                   S       uwait   0xfffff80004ba5000  syz-fuzzer
100105                   S       uwait   0xfffff80004ba5600  syz-fuzzer
100106                   S       uwait   0xfffff80004ba5780  syz-fuzzer
100107                   S       uwait   0xfffff80018322e80  syz-fuzzer
100108                   S       uwait   0xfffff80018322680  syz-fuzzer
100109                   S       uwait   0xfffff80018322780  syz-fuzzer
100110                   S       uwait   0xfffff80018322880  syz-fuzzer
100111                   S       uwait   0xfffff800048ca080  syz-fuzzer
100121                   S       kqread  0xfffff800182db100  syz-fuzzer
  778   776   778     0  Ss      pause   0xfffff8001839c0b0  csh
  776   694   776     0  Ss      select  0xfffff8001851cc40  sshd
  760     1   760     0  Ss+     ttyin   0xfffff800048e58b0  getty
  759     1   759     0  Ss+     ttyin   0xfffff80004bb58b0  getty
  758     1   758     0  Ss+     ttyin   0xfffff80004bb90b0  getty
  757     1   757     0  Ss+     ttyin   0xfffff80004bb98b0  getty
  756     1   756     0  Ss+     ttyin   0xfffff80004bbc0b0  getty
  755     1   755     0  Ss+     ttyin   0xfffff80004bbc8b0  getty
  754     1   754     0  Ss+     ttyin   0xfffff80004bc00b0  getty
  753     1   753     0  Ss+     ttyin   0xfffff80004bc08b0  getty
  752     1   752     0  Ss+     ttyin   0xfffff80004b8c0b0  getty
  698     1   698     0  Ss      nanslp  0xffffffff825331e1  cron
  694     1   694     0  Ss      select  0xfffff80018315240  sshd
  507     1   507     0  Ss      select  0xfffff80018315440  syslogd
  436     1   436     0  Ss      select  0xfffff80018315b40  devd
  435     1   435    65  Ss      select  0xfffff80018315840  dhclient
  350     1   350     0  Ss      select  0xfffff800183159c0  dhclient
  347     1   347     0  Ss      select  0xfffff80004c50a40  dhclient
   23     0     0     0  DL      vlruwt  0xfffff80004d9b528  [vnlru]
   22     0     0     0  DL      syncer  0xffffffff826226b8  [syncer]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100070                   D       qsleep  0xffffffff826217a0  [bufdaemon]
100073                   D       -       0xffffffff8200ac80  [bufspacedaemon-0]
100087                   D       sdflush 0xfffff80004eb0ce8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff82648cc8  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100068                   D       psleep  0xffffffff8263d138  [dom0]
100071                   D       launds  0xffffffff8263d144  [laundry: dom0]
100072                   D       umarcl  0xffffffff8152ae00  [uma]
   18     0     0     0  DL      -       0xffffffff82367578  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff82cdf818  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff82e73430  [pf purge]
   15     0     0     0  DL      -       0xffffffff8261ed5c  [soaiod4]
    9     0     0     0  DL      -       0xffffffff8261ed5c  [soaiod3]
    8     0     0     0  DL      -       0xffffffff8261ed5c  [soaiod2]
    7     0     0     0  DL      -       0xffffffff8261ed5c  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100034                   D       -       0xffffffff8223f2c0  [doneq0]
100067                   D       -       0xffffffff8223f190  [scanner]
   14     0     0     0  DL      seqstat 0xfffff8000458a888  [sequencer 00]
    5     0     0     0  DL      crypto_ 0xfffff80004539d90  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffff80004539d30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff8263a630  [crypto]
   13     0     0     0  DL      (threaded)                  [geom]
100025                   D       -       0xffffffff82512a20  [g_event]
100026                   D       -       0xffffffff82512a28  [g_up]
100027                   D       -       0xffffffff82512a30  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100018                   D       -       0xfffff8000446e900  [thr_0]
100019                   D       -       0xfffff8000446e980  [thr_1]
   12     0     0     0  WL      (threaded)                  [intr]
100012                   I                                   [swi5: fast taskq]
100014                   I                                   [swi6: task queue]
100016                   I                                   [swi6: Giant taskq]
100020                   I                                   [swi3: vm]
100021                   I                                   [swi1: netisr 0]
100022                   I                                   [swi4: clock (0)]
100023                   I                                   [swi4: clock (1)]
100035                   I                                   [irq24: virtio_pci0]
100036                   I                                   [irq25: virtio_pci0]
100037                   I                                   [irq26: virtio_pci0]
100038                   I                                   [irq27: virtio_pci0]
100039                   I                                   [irq28: virtio_pci1]
100040                   I                                   [irq29: virtio_pci1]
100041                   I                                   [irq30: virtio_pci1]
100042                   I                                   [irq31: virtio_pci1]
100043                   I                                   [irq32: virtio_pci1]
100048                   I                                   [irq10: virtio_pci2]
100050                   I                                   [irq1: atkbd0]
100051                   I                                   [irq12: psm0]
100052                   I                                   [swi0: uart uart++]
100060                   I                                   [swi1: pf send]
100076                   I                                   [swi1: hpts]
100077                   I                                   [swi1: hpts]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffff8000448b528  [init]
   10     0     0     0  DL      audit_w 0xffffffff8263ab50  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff82512fb0  [swapper]
100005                   D       -       0xfffff8000446ee00  [if_config_tqg_0]
100006                   D       -       0xfffff8000446ed00  [softirq_0]
100007                   D       -       0xfffff8000446ec00  [softirq_1]
100008                   D       -       0xfffff8000446eb00  [if_io_tqg_0]
100009                   D       -       0xfffff8000446ea00  [if_io_tqg_1]
100010                   D       -       0xfffff8000446de00  [thread taskq]
100011                   D       -       0xfffff8000446dd00  [aiod_kick taskq]
100013                   D       -       0xfffff8000446db00  [kqueue_ctx taskq]
100015                   D       -       0xfffff8000446d900  [in6m_free taskq]
100017                   D       -       0xfffff8000446d700  [inm_free taskq]
100024                   D       -       0xfffff8000446d600  [firmware taskq]
100028                   D       -       0xfffff800044a9b00  [crypto_0]
100029                   D       -       0xfffff800044a9b00  [crypto_1]
100044                   D       -       0xfffff800044a9400  [vtnet0 rxq 0]
100045                   D       -       0xfffff800044a9300  [vtnet0 txq 0]
100046                   D       -       0xfffff800044a9200  [vtnet0 rxq 1]
100047                   D       -       0xfffff800044a9100  [vtnet0 txq 1]
100049                   D       vtbslp  0xfffff8000466a980  [virtio_balloon]
100053                   D       -       0xfffff800044a9000  [mca taskq]
100058                   D       -       0xffffffff81d67fd1  [deadlkres]
100062                   D       -       0xfffff800044a9a00  [acpi_task_0]
100063                   D       -       0xfffff800044a9a00  [acpi_task_1]
100064                   D       -       0xfffff800044a9a00  [acpi_task_2]
100066                   D       -       0xfffff800044a9500  [CAM taskq]
db> show all locks
Process 28865 (syz-executor.1) thread 0xfffffe0088ac0c00 (132358)
exclusive sleep mutex sctp-read (inpr) r = 0 (0xfffff80019acdea8) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctputil.c:5999
exclusive sx so_rcv_sx (so_rcv_sx) r = 0 (0xfffff80019b90168) locked @ /syzkaller/managers/i386/kernel/sys/kern/uipc_sockbuf.c:467
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4216         4340K         4244
          tcp_hpts            5         3201K            5
             vtbuf           24         1968K           46
         sysctloid        30605         1795K        30671
              kobj          329         1316K          489
            newblk            6         1026K        28535
          vfscache            3         1025K            3
               pcb           61          554K        67203
          inodedep            9          515K        30790
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          143          275K        28953
            acpica         1674          184K        58233
         vnet_data            1          168K            1
           tidhash            3          141K            3
           pagedep           10          131K        55873
        tfo_ccache            1          128K            1
               sem            4          106K            4
            DEVFS1          105          105K          122
          filedesc           14          105K        55703
            linker          278          100K          313
               BPF           46           88K           46
               bus          983           80K         3364
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          503           63K          503
              umtx          342           43K          342
           kdtrace          210           42K        61230
         sctp_timw          163           41K          163
              temp           36           35K         9088
         hostcache            1           32K            1
               shm            1           32K           23
            DEVFS3          124           31K          134
               msg            4           30K            4
              vmem            3           26K            6
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
            ifaddr           73           21K           73
        DEVFS_RULE           56           20K           56
         ufs_mount            5           17K            6
              proc            3           17K            3
               tty           16           16K           16
           ithread           99           16K           99
            bus-sc           32           14K         1598
           lltable           43           14K          229
       ether_multi          157           13K          167
            KTRACE          100           13K          100
             ifnet            7           13K            7
              kenv           93           12K           93
      eventhandler          129           11K          129
              GEOM           60           10K          489
              rman           82           10K          423
         in6_multi           71            9K           71
         bmsafemap            2            9K        28008
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K         2304
               rpc            2            8K            2
             shmfd            1            8K           15
       pfs_vncache            1            8K            1
              cred           30            8K          728
         pfs_nodes           20            8K           20
     audit_evclass          236            8K          294
         sctp_stro            7            7K        13728
          routetbl           32            7K         1800
            sglist            5            7K            5
            kqueue           63            7K        28961
           CAM DEV            3            6K          510
            plimit           24            6K          540
         sctp_atcl           15            6K        53050
         CAM queue            5            6K         1528
         taskqueue           48            6K           48
            DEVFSP           78            5K           82
       ufs_dirhash           24            5K           24
          pf_ifnet           12            5K          413
           session           35            5K           56
               UMA          260            5K          260
                vt           11            5K           11
          pf_table            2            4K          444
           memdesc            1            4K            1
               MCA           32            4K           32
          kcovinfo           64            4K           68
             evdev            4            4K            4
           pwddesc           61            4K        28868
             selfd           55            4K       390261
             lockf           32            4K           94
             hhook           13            4K           13
         proc-args           52            3K          728
          terminal           11            3K           11
           acpisem           22            3K           22
            select           19            3K           88
           uidinfo            3            3K           24
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
            dirrem            8            2K        27914
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           15
          sctp_ifa           14            2K           15
            Unitno           28            2K           58
           CAM XPT           22            2K          543
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
               msi            9            2K            9
             clone            9            2K            9
               tun            7            2K            7
       inpcbpolicy           33            2K         6918
           softdep            1            1K            1
          freefile            8            1K        27906
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K          110
      NFSD session            1            1K            1
         sctp_atky           22            1K        74063
        CAM periph            4            1K          271
          sctp_ifn            6            1K           15
             ipsec            3            1K            3
               mld            6            1K            6
              igmp            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           89
          pci_link           10            1K           10
             mkdir            5            1K        55692
            diradd            5            1K        27957
            crypto            4            1K            4
 encap_export_host           12            1K           12
          procdesc            5            1K           18
         sctp_stri            1            1K        13483
         newdirblk            4            1K        27846
              pfil            4            1K            4
           CAM SIM            2            1K            2
              cdev            2            1K            2
    chacha20random            1            1K            1
               osd            3            1K           10
            vnodes            1            1K            1
              ktls            1            1K            1
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
         sctp_athm           15            1K        59608
          sctp_map           14            1K        27128
            feeder            7            1K            7
           tcpfunc            3            1K            3
        loginclass            3            1K            6
            prison            6            1K            6
        aesni_data            2            1K            2
           pf_rule            1            1K          305
     CAM dev queue            2            1K            2
 CAM I/O Scheduler            1            1K            1
            apmdev            1            1K            1
          atkbddev            2            1K            2
          CAM path            4            1K         1034
          freework            1            1K        27899
            soname            5            1K        38893
          pmchooks            1            1K            1
          nexusdev            6            1K            6
          filecaps            5            1K          126
          sctp_vrf            1            1K            1
           entropy            2            1K           50
              vnet            1            1K            1
               pmc            1            1K            1
          acpiintr            1            1K            1
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          p1003.1b            1            1K            1
           pf_altq            0            0K            0
           pf_osfp            0            0K            0
           pf_temp            0            0K            0
            mqdata            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K        14851
         sctp_iter            0            0K          377
         sctp_mvrf            0            0K            0
         sctp_cpal            0            0K          367
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
         sctp_athi            0            0K            0
         sctp_a_it            0            0K           10
         sctp_aadr            0            0K            0
         ciss_data            0            0K            0
           ath_hal            0            0K            0
            athdev            0            0K            0
        madt_table            0            0K            2
          smartpqi            0            0K            0
           ata_pci            0            0K            0
           ata_dma            0            0K            0
       ata_generic            0            0K            0
            pvscsi            0            0K            0
               amr            0            0K            0
           scsi_da            0            0K           69
            ata_da            0            0K            0
              iavf            0            0K            0
               ixl            0            0K            0
           scsi_ch            0            0K            0
           scsi_cd            0            0K            0
            USBdev            0            0K            0
               USB            0            0K            0
       AHCI driver            0            0K            0
               agp            0            0K            0
        ice-resmgr            0            0K            0
         ice-osdep            0            0K            0
               ice            0            0K            0
             axgbe            0            0K            0
          xen_intr            0            0K            0
           nvme_da            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            qpidrv            0            0K            0
           acpipwr            0            0K            0
            twsbuf            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
      twe_commands            0            0K            0
      twa_commands            0            0K            0
       tcp_log_dev            0            0K          682
              isci            0            0K            0
      iommu_dmamap            0            0K            0
      midi buffers            0            0K            0
     hyperv_socket            0            0K            0
           bxe_ilt            0            0K            0
            xenbus            0            0K            0
             mixer            0            0K            0
              ac97            0            0K            0
     vm_fictitious            0            0K            0
             hdacc            0            0K            0
              hdac            0            0K            0
              hdaa            0            0K            0
         acpi_perf            0            0K            0
         acpicmbat            0            0K            0
       SIIS driver            0            0K            0
           CAM CCB            0            0K        59228
           UMAHash            0            0K            0
               PUC            0            0K            0
         vm_pgdata            0            0K            0
           jblocks            0            0K            0
          savedino            0            0K        88887
          sentinel            0            0K            0
            jfsync            0            0K            0
            jtrunc            0            0K            0
             sbdep            0            0K           52
           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
          freeblks            0            0K        27862
          freefrag            0            0K            6
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          indirdep            0            0K           72
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           mactemp            0            0K            0
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               NLM            0            0K            0
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agtiapi_MemAlloc malloc            0            0K            0
               LRO            0            0K            0
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       ip_moptions            0            0K            8
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              ipid            0            0K            0
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        80211power            0            0K            0
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          tempbuff            0            0K            0
ag_tgt_map_t malloc            0            0K            0
ag_slr_map_t malloc            0            0K            0
lDevFlags * malloc            0            0K            0
tiDeviceHandle_t * malloc            0            0K            0
ag_portal_data_t malloc            0            0K            0
ag_device_t malloc            0            0K            0
     STLock malloc            0            0K            0
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               OCS            0            0K            0
               OCS            0            0K            0
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8321     986     1438074       0     254   38121472        0
      mbuf_cluster   2048    1485       1        1485       0     254    3043328        0
              mbuf    256    8843    1507     2735257       0     254    2649600        0
         sctp_asoc   2288       7    1098       13564       0     254    2528240        0
       malloc-2048   2048      13    1107       32532       0       8    2293760        0
        RADIX NODE    144   14843     358      771496       0      63    2188944        0
              pbuf   2632       0     778           0       0       2    2047696        0
          BUF TRIE    144     185   13283       16984       0      62    1939392        0
        malloc-384    384    4168      12        4169       0      30    1605120        0
           sctp_ep   1280       7    1244       32526       0     254    1601280        0
       malloc-4096   4096     336       2         502       0       2    1384448        0
           tcp_log    416      18    3267       73028       0     254    1366560        0
       UMA Slabs 0    112   11825      16       11825       0     126    1326192        0
        malloc-128    128   10040     252       38068       0     126    1317376        0
       malloc-1024   1024       7    1097       13620       0      16    1130496        0
        malloc-384    384      39    2571       84784       0      30    1002240        0
        sctp_raddr    736      12    1165       46422       0     254     866272        0
       tcp_bbr_map    128       2    5268       88300       0     127     674560        0
         FFS inode   1128     520      26       28429       0       8     615888        0
        256 Bucket   2048     242      10       20097       0       8     516096        0
            socket    944      59     385       42515       0     254     419136        0
       mbuf_packet    256      82    1403       67584       0     254     380160        0
         VM OBJECT    264    1346      94      409837       0      30     380160        0
        malloc-256    256     225    1215       65334       0      62     368640        0
             VNODE    488     557      91       28468       0      30     316224        0
            THREAD   1792     148      23       32361       0       8     306432        0
       malloc-4096   4096      61       7       28868       0       2     278528        0
      malloc-65536  65536       1       3          73       0       1     262144        0
      malloc-65536  65536       4       0           4       0       1     262144        0
         malloc-64     64    3211     569       32021       0     254     241920        0
        malloc-256    256      77     778      228669       0      62     218880        0
            DEVCTL   1024       0     212         129       0       0     217088        0
      malloc-16384  16384       7       6       27850       0       1     212992        0
         malloc-16     16   12663     337       12729       0     254     208000        0
      malloc-32768  32768       0       6          59       0       1     196608        0
        sctp_chunk    152      10    1264       36097       0     254     193648        0
         MAP ENTRY     96    1584     390     1555740       0     126     189504        0
        malloc-128    128    1195     262       83367       0     126     186496        0
        malloc-256    256     196     524       28850       0      62     184320        0
         UMA Zones    768     232       2         232       0      16     179712        0
       FFS2 dinode    256     520     125       28428       0      62     165120        0
        malloc-128    128     691     580       33955       0     126     162688        0
         malloc-32     32    4819      95        4844       0     254     157248        0
         tcp_inpcb    488      27     285        5777       0     254     152256        0
       S VFS Cache    104    1069     374       29301       0     126     150072        0
       malloc-1024   1024     125       7         142       0      16     135168        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-65536  65536       0       2         354       0       1     131072        0
           VMSPACE   2544      38      13       28851       0       4     129744        0
         vmem btag     56    2194      98        2194       0     254     128352        0
          ksiginfo    112      66     978        1895       0     126     116928        0
         malloc-64     64     544    1157       28744       0     254     108864        0
              PROC   1320      60      21       28867       0       8     106920        0
             tcpcb   1048      26      73        5777       0     254     103752        0
       malloc-2048   2048       8      42       60469       0       8     102400        0
        128 Bucket   1024      59      40        3868       0      16     101376        0
       malloc-4096   4096      21       2          26       0       2      94208        0
         64 Bucket    512     103      73       22042       0      30      90112        0
         filedesc0   1072      61      23       28868       0       8      90048        0
          UMA Kegs    384     218       5         218       0      30      85632        0
            clpbuf   2632       0      32          19       0      16      84224        0
       malloc-4096   4096      17       3          34       0       2      81920        0
         malloc-32     32     116    2404       56520       0     254      80640        0
        malloc-128    128     361     259       28438       0     126      79360        0
         32 Bucket    256     139     131       14347       0      62      69120        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       0       1         124       0       1      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       0       2           4       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
      malloc-16384  16384       3       1           5       0       1      65536        0
            pcpu-8      8    4653    3027       14333       0     254      61440        0
             g_bio    408       0     150      234377       0      30      61200        0
         malloc-64     64     375     570       31207       0     254      60480        0
        malloc-256    256      67     158         382       0      62      57600        0
       malloc-8192   8192       6       1          97       0       1      57344        0
        malloc-128    128     380      23        2824       0     126      51584        0
      malloc-16384  16384       3       0           9       0       1      49152        0
       malloc-8192   8192       1       5          35       0       1      49152        0
       malloc-8192   8192       4       2          60       0       1      49152        0
       malloc-2048   2048       5      19         979       0       8      49152        0
        malloc-256    256     180       0         180       0      62      46080        0
              pipe    744      23      37         689       0      16      44640        0
         malloc-64     64     131     562       29038       0     254      44352        0
       malloc-8192   8192       2       3          31       0       1      40960        0
             Files     80     234     266       83961       0     126      40000        0
         malloc-16     16      67    2433       87702       0     254      40000        0
         malloc-16     16      43    2457       39022       0     254      40000        0
        malloc-384    384      83      17         107       0      30      38400        0
        malloc-256    256      59      91        3312       0      62      38400        0
           DIRHASH   1024      34       2          34       0      16      36864        0
             NAMEI   1024       0      36      128406       0      16      36864        0
       malloc-4096   4096       4       5       28646       0       2      36864        0
         malloc-64     64     489      78        1077       0     254      36288        0
          8 Bucket     80     184     266        9645       0     126      36000        0
      malloc-32768  32768       0       1         117       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
        malloc-512    512       1      63       13483       0      30      32768        0
           pcpu-64     64     456      56         456       0     254      32768        0
       tcp_bbr_pcb    832       1      35         830       0      16      29952        0
       malloc-2048   2048       9       5          49       0       8      28672        0
          4 Bucket     48       7     581        1062       0     254      28224        0
             KNOTE    160      28     147      420929       0      62      28000        0
        malloc-256    256      17      88       31063       0      62      26880        0
         TURNSTILE    136     172      17         172       0      62      25704        0
       malloc-8192   8192       2       1           4       0       1      24576        0
       malloc-8192   8192       3       0           3       0       1      24576        0
               PWD     32      20     736       27944       0     254      24192        0
         malloc-64     64     170     208      409742       0     254      24192        0
         16 Bucket    144     119      49        1508       0      62      24192        0
            ttyinq    160     135      15         300       0      62      24000        0
        sctp_readq    152       1     155        5474       0     254      23712        0
      tcp_rack_pcb    704       1      32         548       0      16      23232        0
           ttyoutq    256      72      18         160       0      62      23040        0
       malloc-1024   1024       6      14         207       0      16      20480        0
sctp_stream_msg_out    112       2     178        6639       0     254      20160        0
         malloc-32     32      67     563       36758       0     254      20160        0
          2 Bucket     32      61     569        5713       0     254      20160        0
      vtnet_tx_hdr     24       0     835      767528       0     254      20040        0
        malloc-128    128     113      42        2201       0     126      19840        0
        malloc-128    128      96      59         375       0     126      19840        0
       Mountpoints   2752       2       5           2       0       4      19264        0
             unpcb    256      20      55        3016       0     254      19200        0
        malloc-384    384      20      30         206       0      30      19200        0
        SLEEPQUEUE     88     172      20         172       0     126      16896        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       0       1         153       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-2048   2048       5       3         196       0       8      16384        0
       malloc-1024   1024      11       5          29       0      16      16384        0
       malloc-1024   1024      12       4          21       0      16      16384        0
       malloc-1024   1024      11       5          37       0      16      16384        0
         malloc-32     32     335     169        5906       0     254      16128        0
             ripcb    488       5      27         235       0     254      15616        0
     udplite_inpcb    488       0      32         349       0     254      15616        0
        malloc-384    384      40       0          40       0      30      15360        0
       malloc-4096   4096       1       2          42       0       2      12288        0
       malloc-2048   2048       2       4          10       0       8      12288        0
        malloc-512    512      13      11         123       0      30      12288        0
        malloc-512    512      10      14         655       0      30      12288        0
         malloc-32     32      61     317         507       0     254      12096        0
      tcp_rack_map    120       2      97         650       0     126      11880        0
         udp_inpcb    488       2      22         557       0     254      11712        0
     routing nhops    256      27      18          35       0      62      11520        0
        malloc-384    384      21       9         333       0      30      11520        0
       malloc-1024   1024       2       6        2276       0      16       8192        0
        malloc-512    512       1      15           7       0      30       8192        0
        malloc-512    512       4      12          59       0      30       8192        0
           rtentry    176      31      15          35       0      62       8096        0
              PGRP     88      35      57          56       0     126       8096        0
          rl_entry     40      66     136          66       0     254       8080        0
        sctp_laddr     48       0     168         791       0     254       8064        0
             udpcb     32       2     250         906       0     254       8064        0
         malloc-64     64      26     100          26       0     254       8064        0
         malloc-64     64      90      36        3347       0     254       8064        0
         malloc-32     32       4     248          34       0     254       8064        0
         malloc-32     32      68     184         963       0     254       8064        0
         malloc-32     32      19     233        2566       0     254       8064        0
         malloc-16     16       6     494           6       0     254       8000        0
         malloc-16     16      35     465        5922       0     254       8000        0
         malloc-16     16     195     305        1369       0     254       8000        0
         malloc-16     16      25     475          46       0     254       8000        0
         malloc-16     16     265     235       26737       0     254       8000        0
            itimer    352       0      22           8       0      30       7744        0
              kenv    258       3      27        1053       0      30       7740        0
        malloc-256    256      14      16        1218       0      62       7680        0
     FPU_save_area    832       1       8           1       0      16       7488        0
            cpuset    104       7      55          31       0     126       6448        0
         domainset     40       0     126          18       0     254       5040        0
 epoch_record pcpu    256       4      12           4       0      62       4096        0
       malloc-4096   4096       1       0           1       0       2       4096        0
       malloc-2048   2048       1       1           1       0       8       4096        0
       malloc-2048   2048       0       2          36       0       8       4096        0
       malloc-1024   1024       2       2         156       0      16       4096        0
        malloc-512    512       1       7           1       0      30       4096        0
        malloc-512    512       0       8           3       0      30       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
         hostcache     96       1      41           1       0     254       4032        0
          syncache    168       0      24           4       0     254       4032        0
               ipq     56       0      72           1       0     254       4032        0
        malloc-128    128       5      26           5       0     126       3968        0
       UMA Slabs 1    176      14       8          14       0      62       3872        0
            mqnode    416       3       6           3       0      30       3744        0
        KMAP ENTRY     96      12      27          12       0       0       3744        0
              vmem   1856       1       1           1       0       8       3712        0
           SMR CPU     32       2      61           2       0     254       2016        0
        SMR SHARED     24       2      61           2       0     254       1512        0
       FFS1 dinode    128       0       0           0       0     126          0        0
             swblk    136       0       0           0       0      62          0        0
          swpctrie    144       0       0           0       0      62          0        0
   sctp_asconf_ack     48       0       0           0       0     254          0        0
       sctp_asconf     40       0       0           0       0     254          0        0
   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    296       0       0           0       0     254          0        0
           pf tags    104       0       0           0       0     126          0        0
          pf mtags     48       0       0           0       0     254          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
      tcp_log_node    120       0       0           0       0     126          0        0
    tcp_log_bucket    176       0       0           0       0      62          0        0
          tcpreass     48       0       0           0       0     254          0        0
tfo_ccache_entries     80       0       0           0       0     126          0        0
               tfo      4       0       0           0       0     254          0        0
          sackhole     32       0       0           0       0     254          0        0
             tcptw     88       0       0           0       0     254          0        0
            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
        TMPFS node    224       0       0           0       0      62          0        0
        mqnotifier    216       0       0           0       0      62          0        0
            mvdata     64       0       0           0       0     254          0        0
            mqueue    248       0       0           0       0      62          0        0
           NCLNODE    592       0       0           0       0      16          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
       L VFS Cache    320       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
           cryptop    280       0       0           0       0      30          0        0
   IOMMU_MAP_ENTRY    120       0       0           0       0     126          0        0
      ktls_session    192       0       0           0       0      62          0        0
    mbuf_jumbo_16k  16384       0       0           0       0     254          0        0
     mbuf_jumbo_9k   9216       0       0           0       0     254          0        0
      audit_record   1280       0       0           0       0       8          0        0
        MAC labels     40       0       0           0       0     254          0        0
            vnpbuf   2632       0       0           0       0      64          0        0
            mdpbuf   2632       0       0           0       0       3          0        0
           nfspbuf   2632       0       0           0       0      16          0        0
            swwbuf   2632       0       0           0       0       8          0        0
            swrbuf   2632       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-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
       malloc-4096   4096       0       0           0       0       2          0        0
        malloc-512    512       0       0           0       0      30          0        0
        malloc-384    384       0       0           0       0      30          0        0
        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 (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2021/02/04 23:10 freebsd-src cb7cc72c546e 42b90a7c console log report ci-freebsd-i386 panic: Counter goes negative
2021/01/14 11:27 freebsd-src 818390ce0ca5 269d24e8 console log report ci-freebsd-main
* Struck through repros no longer work on HEAD.