syzbot


panic: allocdirect_merge: old blkno 9656 != new 9656 || old size 4096 != new NUM

Status: closed as dup on 2020/04/11 20:00
Reported-by: syzbot+c69884070d0eed478522@syzkaller.appspotmail.com
First crash: 1492d, last: 1492d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
panic: allocdirect_merge: old blkno 9384 != new 9384 || old size 4096 != new NUM 2 1489d 1490d

Sample crash report:
panic: allocdirect_merge: old blkno 9656 != new 9656 || old size 4096 != new 32768
cpuid = 1
time = 1586015906
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0024a9f3b0
vpanic() at vpanic+0x1c7/frame 0xfffffe0024a9f410
panic() at panic+0x43/frame 0xfffffe0024a9f470
allocdirect_merge() at allocdirect_merge+0x2c4/frame 0xfffffe0024a9f4d0
merge_inode_lists() at merge_inode_lists+0x177/frame 0xfffffe0024a9f520
softdep_update_inodeblock() at softdep_update_inodeblock+0x374/frame 0xfffffe0024a9f580
ffs_update() at ffs_update+0x309/frame 0xfffffe0024a9f620
ffs_truncate() at ffs_truncate+0x7b1/frame 0xfffffe0024a9f810
ufs_setattr() at ufs_setattr+0x91e/frame 0xfffffe0024a9f8b0
VOP_SETATTR_APV() at VOP_SETATTR_APV+0x75/frame 0xfffffe0024a9f8e0
vn_truncate_locked() at vn_truncate_locked+0xb6/frame 0xfffffe0024a9f9f0
vn_truncate() at vn_truncate+0x1d1/frame 0xfffffe0024a9fa70
kern_ftruncate() at kern_ftruncate+0x151/frame 0xfffffe0024a9fac0
amd64_syscall() at amd64_syscall+0x262/frame 0xfffffe0024a9fbf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0024a9fbf0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x41332a, rsp = 0x7fffdfffdf38, rbp = 0x2 ---
KDB: enter: panic
[ thread pid 1299 tid 100567 ]
Stopped at      kdb_enter+0x67: movq    $0,0x146ea36(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b  ll+0x1a
es                        0x3b  ll+0x1a
fs                        0x13
gs                        0x1b
ss                        0x28  ll+0x7
rax                       0x12
rcx         0xfffffe0027400000
rdx                    0x3ffff
rbx                          0
rsp         0xfffffe0024a9f390
rbp         0xfffffe0024a9f3b0
rsi                    0x40001
rdi         0xffffffff810b3586  vprintf+0x176
r8                           0
r9                  0xffffffff
r10                        0x6
r11                    0x12dfe
r12         0xffffffff82068e50  ddb_dbbe
r13                          0
r14         0xffffffff81932d3e
r15         0xffffffff81932d3e
rip         0xffffffff810a8847  kdb_enter+0x67
rflags                    0x86  ll+0x65
kdb_enter+0x67: movq    $0,0x146ea36(%rip)
db> show proc
Process 1299 (syz-executor.1) at 0xfffff8000b9d3000:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 769 at 0xfffff8000b412528
 ABI: FreeBSD ELF64
 arguments: /root/syz-executor.1
 reaper: 0xfffff8000330c000 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe0024981000
   (map 0xfffffe0024981000)
   (map.pmap 0xfffffe00249810c0)
   (pmap 0xfffffe0024981120)
 threads: 5
101066                   RunQ                                syz-executor.1
100567                   Run     CPU 1                       syz-executor.1
100568                   S       sbwait  0xfffffe0003dd8a8c  syz-executor.1
100570                   S       uwait   0xfffff8000bd97180  syz-executor.1
100576                   S       uwait   0xfffff80003a37980  syz-executor.1
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 1300   768   768     0  R       (threaded)                  syz-executor.0
100076                   RunQ                                syz-executor.0
100572                   S       sbwait  0xfffffe0003da4e14  syz-executor.0
100574                   S       sbwait  0xfffffe0003de1c6c  syz-executor.0
100577                   S       sbwait  0xfffffe0003ddbc6c  syz-executor.0
100578                   RunQ                                syz-executor.0
 1299   769   769     0  R       (threaded)                  syz-executor.1
101066                   RunQ                                syz-executor.1
100567                   Run     CPU 1                       syz-executor.1
100568                   S       sbwait  0xfffffe0003dd8a8c  syz-executor.1
100570                   S       uwait   0xfffff8000bd97180  syz-executor.1
100576                   S       uwait   0xfffff80003a37980  syz-executor.1
 1297   776   776     0  R       (threaded)                  syz-executor.3
100487                   Run     CPU 0                       syz-executor.3
100561                   S       uwait   0xfffff8000330fa00  syz-executor.3
100563                   S       sbwait  0xfffffe0003dd12d4  syz-executor.3
100565                   S       uwait   0xfffff80003a37880  syz-executor.3
 1296   771   771     0  R       (threaded)                  syz-executor.2
100113                   RunQ                                syz-executor.2
100554                   S       uwait   0xfffff80003a37b80  syz-executor.2
100556                   S       sbwait  0xfffffe0003dde704  syz-executor.2
100558                   S       uwait   0xfffff8000bd97280  syz-executor.2
  990   984   990     0  Ss      select  0xfffff80003a50740  dhclient
  987     1   987     0  Ss      select  0xfffff80003a50840  dhclient
  984   977   422    65  S       select  0xfffff80003a50ac0  dhclient
  977   422   422     0  S       wait    0xfffff80003d1aa50  sh
  776   766   776     0  Rs                                  syz-executor.3
  771   766   771     0  Ss      nanslp  0xffffffff824ffe80  syz-executor.2
  769   766   769     0  Ss      nanslp  0xffffffff824ffe80  syz-executor.1
  768   766   768     0  Ss      nanslp  0xffffffff824ffe80  syz-executor.0
  766   764   764     0  S       (threaded)                  syz-fuzzer
100094                   S       uwait   0xfffff80003a3a680  syz-fuzzer
100095                   S       uwait   0xfffff800037fb080  syz-fuzzer
100096                   S       kqread  0xfffff80003a3b600  syz-fuzzer
100097                   S       uwait   0xfffff800037fb300  syz-fuzzer
100098                   S       uwait   0xfffff800037fb400  syz-fuzzer
100099                   S       uwait   0xfffff800037fc500  syz-fuzzer
100100                   S       uwait   0xfffff800037fc600  syz-fuzzer
100101                   S       uwait   0xfffff80003a3a780  syz-fuzzer
100102                   S       uwait   0xfffff800037fc700  syz-fuzzer
100103                   S       uwait   0xfffff80003a3a880  syz-fuzzer
  764   762   764     0  Ss      pause   0xfffff8000b4075d0  csh
  762   680   762     0  Ss      select  0xfffff800030ee940  sshd
  746     1   746     0  Ss+     ttyin   0xfffff8000380dcb0  getty
  745     1   745     0  Ss+     ttyin   0xfffff80003b1d0b0  getty
  744     1   744     0  Ss+     ttyin   0xfffff80003b1d4b0  getty
  743     1   743     0  Ss+     ttyin   0xfffff80003b1d8b0  getty
  742     1   742     0  Ss+     ttyin   0xfffff80003b1dcb0  getty
  741     1   741     0  Ss+     ttyin   0xfffff80003b200b0  getty
  740     1   740     0  Ss+     ttyin   0xfffff80003b204b0  getty
  739     1   739     0  Ss+     ttyin   0xfffff80003b208b0  getty
  738     1   738     0  Ss+     ttyin   0xfffff80003b20cb0  getty
  684     1   684     0  Ss      nanslp  0xffffffff824ffe80  cron
  680     1   680     0  Ss      select  0xfffff800030eedc0  sshd
  493     1   493     0  Ss      select  0xfffff800030eea40  syslogd
  422     1   422     0  Ss      wait    0xfffff80003c80a50  devd
  421     1   421    65  Ss      select  0xfffff80003a52140  dhclient
  336     1   336     0  Ss      select  0xfffff80003a522c0  dhclient
  333     1   333     0  Ss      select  0xfffff800030eeb40  dhclient
   21     0     0     0  DL      syncer  0xffffffff825d6318  [syncer]
   20     0     0     0  DL      vlruwt  0xfffff80003aef000  [vnlru]
   19     0     0     0  DL      (threaded)                  [bufdaemon]
100065                   D       qsleep  0xffffffff825d5818  [bufdaemon]
100070                   D       -       0xffffffff8200aa00  [bufspacedaemon-0]
100081                   D       sdflush 0xfffff80003c9cce8  [/ worker]
   18     0     0     0  DL      psleep  0xffffffff825f1188  [vmdaemon]
   17     0     0     0  DL      (threaded)                  [pagedaemon]
100063                   D       psleep  0xffffffff8261d058  [dom0]
100068                   D       launds  0xffffffff8261d064  [laundry: dom0]
100069                   D       umarcl  0xffffffff81536ab0  [uma]
   16     0     0     0  DL      -       0xffffffff8235a6b0  [rand_harvestq]
   15     0     0     0  DL      waiting 0xffffffff82662620  [sctp_iterator]
    9     0     0     0  DL      -       0xffffffff825d521c  [soaiod4]
    8     0     0     0  DL      -       0xffffffff825d521c  [soaiod3]
    7     0     0     0  DL      -       0xffffffff825d521c  [soaiod2]
    6     0     0     0  DL      -       0xffffffff825d521c  [soaiod1]
    5     0     0     0  DL      (threaded)                  [cam]
100031                   D       -       0xffffffff82235ac0  [doneq0]
100062                   D       -       0xffffffff82235988  [scanner]
    4     0     0     0  DL      crypto_ 0xfffff8000320be90  [crypto returns 1]
    3     0     0     0  DL      crypto_ 0xfffff8000320be30  [crypto returns 0]
    2     0     0     0  DL      crypto_ 0xffffffff825eb250  [crypto]
   14     0     0     0  DL      seqstat 0xfffff80003364488  [sequencer 00]
   13     0     0     0  DL      (threaded)                  [geom]
100022                   D       -       0xffffffff8261b688  [g_event]
100023                   D       -       0xffffffff8261b698  [g_up]
100024                   D       -       0xffffffff8261b690  [g_down]
   12     0     0     0  WL      (threaded)                  [intr]
100010                   I                                   [swi6: Giant taskq]
100012                   I                                   [swi5: fast taskq]
100016                   I                                   [swi6: task queue]
100017                   I                                   [swi3: vm]
100018                   I                                   [swi4: clock (0)]
100019                   I                                   [swi4: clock (1)]
100020                   I                                   [swi1: netisr 0]
100032                   I                                   [irq24: virtio_pci0]
100033                   I                                   [irq25: virtio_pci0]
100034                   I                                   [irq26: virtio_pci0]
100035                   I                                   [irq27: virtio_pci0]
100036                   I                                   [irq28: virtio_pci1]
100037                   I                                   [irq29: virtio_pci1]
100038                   I                                   [irq30: virtio_pci1]
100039                   I                                   [irq31: virtio_pci1]
100040                   I                                   [irq32: virtio_pci1]
100045                   I                                   [irq10: virtio_pci2]
100047                   I                                   [irq1: atkbd0]
100048                   I                                   [irq12: psm0]
100049                   I                                   [swi0: uart uart++]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffff8000330c000  [init]
   10     0     0     0  DL      audit_w 0xffffffff826631a8  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff8260ad08  [swapper]
100005                   D       -       0xfffff80003215b00  [if_config_tqg_0]
100006                   D       -       0xfffff80003215900  [softirq_0]
100007                   D       -       0xfffff80003215700  [softirq_1]
100008                   D       -       0xfffff80003215500  [if_io_tqg_0]
100009                   D       -       0xfffff80003215300  [if_io_tqg_1]
100011                   D       -       0xfffff800031fad00  [thread taskq]
100013                   D       -       0xfffff800031fab00  [in6m_free taskq]
100014                   D       -       0xfffff800031faa00  [aiod_kick taskq]
100015                   D       -       0xfffff800031fa900  [kqueue_ctx taskq]
100021                   D       -       0xfffff800031fa700  [firmware taskq]
100026                   D       -       0xfffff800031fa500  [crypto_0]
100027                   D       -       0xfffff800031fa500  [crypto_1]
100041                   D       -       0xfffff800031f7a00  [vtnet0 rxq 0]
100042                   D       -       0xfffff800031f7900  [vtnet0 txq 0]
100043                   D       -       0xfffff800031f7800  [vtnet0 rxq 1]
100044                   D       -       0xfffff800031f7700  [vtnet0 txq 1]
100046                   D       vtbslp  0xfffff800037f3800  [virtio_balloon]
100050                   D       -       0xfffff8000381e200  [mca taskq]
100054                   D       -       0xffffffff81cd60c1  [deadlkres]
100057                   D       -       0xfffff80003b1c900  [acpi_task_0]
100058                   D       -       0xfffff80003b1c900  [acpi_task_1]
100059                   D       -       0xfffff80003b1c900  [acpi_task_2]
100061                   D       -       0xfffff800031fa200  [CAM taskq]
db> show all locks
Process 1299 (syz-executor.1) thread 0xfffffe0024960c00 (100567)
exclusive rw per-fs softdep (per-fs softdep) r = 0 (0xfffff80003c9cc00) locked @ /syzkaller/managers/main/kernel/sys/ufs/ffs/ffs_softdep.c:12362
exclusive lockmgr bufwait (bufwait) r = 0 (0xfffffe0003e03140) locked @ /syzkaller/managers/main/kernel/sys/kern/vfs_bio.c:3878
exclusive lockmgr ufs (ufs) r = 0 (0xfffff8000b3badc0) locked @ /syzkaller/managers/main/kernel/sys/kern/vfs_vnops.c:1318
Process 1297 (syz-executor.3) thread 0xfffffe0024986800 (100563)
exclusive sx so_snd_sx (so_snd_sx) r = 0 (0xfffffe0003dd1278) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_sockbuf.c:419
db> show malloc
              Type        InUse        MemUse     Requests
            devbuf         4213         4851K         4241
             vtbuf           24         1968K           46
         sysctloid        25931         1511K        25995
              kobj          332         1328K          488
            newblk            9         1026K         5388
          vfscache            4         1025K            4
               pcb           23          537K          589
          inodedep            8          516K          864
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          388K            4
           subproc          126          249K         1374
            acpica         1674          185K        52709
         vnet_data            1          168K            1
          filedesc           21          149K          859
           pagedep            5          129K          521
        tfo_ccache            1          128K            1
               sem            4          106K            4
            DEVFS1          105          105K          122
            linker          222           89K          253
               bus          988           79K         3374
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          494           62K          494
              umtx          324           41K          324
               BPF           22           36K           22
           kdtrace          179           35K         4147
         hostcache            1           32K            1
               shm            1           32K            7
            DEVFS3          124           31K          134
               msg            4           30K            4
        DEVFS_RULE           56           27K           56
        gtaskqueue           18           26K           18
            ifaddr           71           24K           73
              vmem            3           22K            4
            kbdmux            6           22K            6
           lltable           48           18K           67
              temp           34           17K         2073
         ufs_mount            3           17K            4
              proc            3           17K            3
               tty           16           16K           16
           tidhash            1           16K            1
           ithread           89           15K           89
       ether_multi          172           14K          177
            bus-sc           30           14K         1431
            KTRACE          100           13K          100
             ifnet            7           13K            7
              kenv           95           12K           99
         in6_multi           89           11K           89
      eventhandler          122           11K          122
         pfs_nodes           20           10K           20
              GEOM           60           10K          487
              rman           82           10K          423
         bmsafemap            2            9K          773
              UART           12            9K           12
           devstat            4            9K            4
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
          routetbl           58            8K           62
         sctp_timw           31            8K           31
     audit_evclass          232            8K          290
              cred           25            7K          249
            select           49            7K           49
           CAM DEV            3            6K          510
            kqueue           55            6K         1307
                vt           11            6K           11
            plimit           21            6K          426
            sglist            5            6K            5
         CAM queue            5            6K         1528
         taskqueue           45            5K           45
       ufs_dirhash           24            5K           24
            DEVFSP           72            5K           76
           memdesc            1            4K            1
               MCA           32            4K           32
           CAM CCB            2            4K        16595
             evdev            4            4K            4
          kcovinfo           64            4K           68
               UMA          235            4K          235
             hhook           13            4K           13
           session           25            4K           38
              pgrp           25            4K           38
           acpisem           22            3K           22
          terminal           11            3K           11
             lockf           25            3K          347
         proc-args           44            3K          572
           uidinfo            3            3K           22
          sctp_ifa           17            3K           17
        local_apic            1            2K            1
           io_apic            1            2K            1
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           21
            Unitno           28            2K          943
           CAM XPT           22            2K          543
          in_multi            6            2K            7
           acpidev           20            2K           20
               msi            9            2K            9
               tun            7            2K            7
           softdep            1            1K            1
       ipsecpolicy            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             clone            8            1K            8
       vnodemarker            2            1K          272
      NFSD session            1            1K            1
        CAM periph            4            1K          271
       inpcbpolicy           26            1K         2378
          indirdep            3            1K         1352
               mld            6            1K            6
          sctp_ifn            6            1K            6
              igmp            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           86
          pci_link           10            1K           10
            crypto            3            1K            3
             mkdir            4            1K          858
            diradd            4            1K          626
              pfil            4            1K            4
    chacha20random            1            1K            1
           CAM SIM            2            1K            2
             epoch            4            1K            4
              cdev            2            1K            2
 encap_export_host            8            1K            8
               osd            3            1K            9
               iov            2            1K        15407
         newdirblk            2            1K          429
            dirrem            1            1K          591
          freefile            2            1K          583
            vnodes            1            1K            7
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            feeder            7            1K            7
        loginclass            3            1K            6
     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
          pmchooks            1            1K            1
            prison            4            1K            4
            soname            4            1K         6099
          nexusdev            5            1K            5
           entropy            2            1K           38
           tcpfunc            1            1K            1
          sctp_vrf            1            1K            1
              vnet            1            1K            1
          acpiintr            1            1K            1
               pmc            1            1K            1
              cpus            2            1K            2
          freework            1            1K         1473
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          filecaps            2            1K           92
          p1003.1b            1            1K            1
           ath_hal            0            0K            0
            athdev            0            0K            0
        madt_table            0            0K            2
           ata_pci            0            0K            0
           ata_dma            0            0K            0
       ata_generic            0            0K            0
               amr            0            0K            0
           scsi_da            0            0K           69
            ata_da            0            0K            0
           scsi_ch            0            0K            0
            pvscsi            0            0K            0
          smartpqi            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
           nvme_da            0            0K            0
              iavf            0            0K            0
               ixl            0            0K            0
           acpipwr            0            0K            0
            twsbuf            0            0K            0
      twe_commands            0            0K            0
      twa_commands            0            0K            0
       tcp_log_dev            0            0K            2
      midi buffers            0            0K            0
             mixer            0            0K            0
       fpukern_ctx            0            0K            0
          xen_intr            0            0K            0
              ac97            0            0K            0
             hdacc            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            qpidrv            0            0K            0
              hdac            0            0K            0
              hdaa            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
       dmar_dmamap            0            0K            0
         acpi_perf            0            0K            0
         acpicmbat            0            0K            0
       SIIS driver            0            0K            0
              isci            0            0K            0
           bxe_ilt            0            0K            0
            xenbus            0            0K            0
     vm_fictitious            0            0K            0
               PUC            0            0K            0
          ppbusdev            0            0K            0
agtiapi_MemAlloc malloc            0            0K            0
    osti_cacheable            0            0K            0
          tempbuff            0            0K            0
          tempbuff            0            0K            0
ag_tgt_map_t malloc            0            0K            0
           UMAHash            0            0K            0
ag_slr_map_t malloc            0            0K            0
lDevFlags * malloc            0            0K            0
         vm_pgdata            0            0K            0
           jblocks            0            0K            0
          savedino            0            0K          766
          sentinel            0            0K            0
            jfsync            0            0K            0
            jtrunc            0            0K            0
             sbdep            0            0K          131
           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          603
          freefrag            0            0K           15
        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
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         audit_bsm            0            0K            0
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        audit_data            0            0K            0
        audit_cred            0            0K            0
             xform            0            0K            0
               NLM            0            0K            0
 nfsclient_nlminfo            0            0K            0
    nfsclient_lock            0            0K            0
           NFS FHA            0            0K            0
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            ip6opt            0            0K            8
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             frag6            0            0K            0
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               LRO            0            0K            0
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        sctp_socko            0            0K          119
         sctp_iter            0            0K           11
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         sctp_cpal            0            0K            0
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
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         sctp_athm            0            0K          302
         sctp_atky            0            0K          408
         sctp_atcl            0            0K          302
         sctp_a_it            0            0K           11
         sctp_aadr            0            0K            0
         sctp_stro            0            0K          106
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          sctp_map            0            0K          212
      newreno data            0            0K            0
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              ipid            0            0K            0
         80211scan            0            0K            0
      80211ratectl            0            0K            0
        80211power            0            0K            0
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         80211node            0            0K            0
      80211mesh_gt            0            0K            0
      80211mesh_rt            0            0K            0
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         80211prep            0            0K            0
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tiDeviceHandle_t * malloc            0            0K            0
            statfs            0            0K          601
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        cl_savebuf            0            0K            6
ag_portal_data_t malloc            0            0K            0
ag_device_t malloc            0            0K            0
     STLock malloc            0            0K            0
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            vtfont            0            0K            0
db> show ktr
No such command; use "help" to list available commands

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/04/04 15:58 freebsd 50e8f4b13f4e d9ed075d console log report ci-freebsd-main
* Struck through repros no longer work on HEAD.