syzbot


panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:NUM

Status: closed as dup on 2021/09/11 17:06
Reported-by: syzbot+43912149bad95abbae12@syzkaller.appspotmail.com
First crash: 1515d, last: 1247d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/tcp_output.c:LINE syz 707 1193d 2078d

Sample crash report:
login: panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:13006
cpuid = 0
time = 1602308316
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00255f6460
vpanic() at vpanic+0x1c7/frame 0xfffffe00255f64c0
panic() at panic+0x43/frame 0xfffffe00255f6520
__mtx_lock_flags() at __mtx_lock_flags+0x202/frame 0xfffffe00255f6580
sctp_lower_sosend() at sctp_lower_sosend+0x2a59/frame 0xfffffe00255f6770
sctp_sosend() at sctp_sosend+0x4fc/frame 0xfffffe00255f68a0
sosend() at sosend+0xc6/frame 0xfffffe00255f6910
kern_sendit() at kern_sendit+0x34b/frame 0xfffffe00255f69c0
freebsd32_sendmsg() at freebsd32_sendmsg+0x261/frame 0xfffffe00255f6ab0
ia32_syscall() at ia32_syscall+0x24e/frame 0xfffffe00255f6bf0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xfbffcf78
KDB: enter: panic
[ thread pid 807 tid 100129 ]
Stopped at      kdb_enter+0x67: movq    $0,0x1480626(%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                           0
rax                       0x12
rcx                       0x80  ll+0x5f
rdx         0xffffffff818ee13d
rbx                          0
rsp         0xfffffe00255f6440
rbp         0xfffffe00255f6460
rsi                        0x1
rdi                          0
r8                           0
r9                  0xffffffff
r10                 0x533dd5a4
r11                 0xe78ddd25
r12         0xffffffff82066b10  ddb_dbbe
r13                          0
r14         0xffffffff81938a4c
r15         0xffffffff81938a4c
rip         0xffffffff810d1a57  kdb_enter+0x67
rflags                0x200086  kernphys+0x86
kdb_enter+0x67: movq    $0,0x1480626(%rip)
db> show proc
Process 807 (syz-executor.0) at 0xfffff8001f8cda40:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 769 at 0xfffff8001f8cc000
 ABI: FreeBSD ELF32
 arguments: /root/syz-executor.0
 reaper: 0xfffff80004319000 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe002573d9e8
   (map 0xfffffe002573d9e8)
   (map.pmap 0xfffffe002573daa8)
   (pmap 0xfffffe002573db08)
 threads: 3
100118                   Run     CPU 1                       syz-executor.0
100129                   Run     CPU 0                       syz-executor.0
100130                   S       uwait   0xfffff80004a53880  syz-executor.0
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  807   769   769     0  R       (threaded)                  syz-executor.0
100118                   Run     CPU 1                       syz-executor.0
100129                   Run     CPU 0                       syz-executor.0
100130                   S       uwait   0xfffff80004a53880  syz-executor.0
  806   794   806     0  Ss      select  0xfffff80004a86dc0  dhclient
  800     1   800     0  Ss      select  0xfffff800041e7b40  dhclient
  794   784   424     0  R                                   dhclient
  784   424   424     0  S       wait    0xfffff8001f4e5520  sh
  769   767   769     0  Ss      nanslp  0xffffffff82525801  syz-executor.0
  767   765   765     0  S       (threaded)                  syz-execprog
100104                   S       uwait   0xfffff80004e36180  syz-execprog
100110                   S       uwait   0xfffff80004a56000  syz-execprog
100111                   S       uwait   0xfffff80004a56100  syz-execprog
100112                   S       uwait   0xfffff80004a56200  syz-execprog
100113                   S       kqread  0xfffff80004c04a00  syz-execprog
100115                   S       uwait   0xfffff80004a53380  syz-execprog
100116                   S       uwait   0xfffff80004a53480  syz-execprog
100117                   S       uwait   0xfffff80004a53580  syz-execprog
  765   763   765     0  Ss      pause   0xfffff8001f4e50a8  csh
  763   682   763     0  Ss      select  0xfffff800041e79c0  sshd
  742     1   742     0  Ss+     ttyin   0xfffff800047ef4b0  getty
  741     1   741     0  Ss+     ttyin   0xfffff80004b660b0  getty
  740     1   740     0  Ss+     ttyin   0xfffff80004b664b0  getty
  739     1   739     0  Ss+     ttyin   0xfffff80004b668b0  getty
  738     1   738     0  Ss+     ttyin   0xfffff80004b66cb0  getty
  737     1   737     0  Ss+     ttyin   0xfffff800047ee0b0  getty
  736     1   736     0  Ss+     ttyin   0xfffff800047ee4b0  getty
  735     1   735     0  Ss+     ttyin   0xfffff800047ee8b0  getty
  734     1   734     0  Ss+     ttyin   0xfffff800047eecb0  getty
  732   730    24     0  S+      nanslp  0xffffffff82525801  sleep
  731     1    24     0  S+      piperd  0xfffff80004ca7000  logger
  730     1    24     0  S+      wait    0xfffff80004d2d520  sh
  686     1   686     0  Ss      nanslp  0xffffffff82525801  cron
  682     1   682     0  Ss      select  0xfffff800041e7c40  sshd
  495     1   495     0  Ss      select  0xfffff800041e7f40  syslogd
  424     1   424     0  Ss      wait    0xfffff80004c8d520  devd
  423     1   423    65  Ss      select  0xfffff80004a85840  dhclient
  338     1   338     0  Ss      select  0xfffff80004a85f40  dhclient
  335     1   335     0  Ss      select  0xfffff800041e7ec0  dhclient
   23     0     0     0  DL      syncer  0xffffffff826128e8  [syncer]
   22     0     0     0  DL      vlruwt  0xfffff80004b51000  [vnlru]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100070                   D       qsleep  0xffffffff82611c50  [bufdaemon]
100077                   D       -       0xffffffff8200ae00  [bufspacedaemon-0]
100087                   D       sdflush 0xfffff80004c0d4e8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff82638ec8  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100068                   D       psleep  0xffffffff8262d2f8  [dom0]
100075                   D       launds  0xffffffff8262d304  [laundry: dom0]
100076                   D       umarcl  0xffffffff814d7780  [uma]
   18     0     0     0  DL      -       0xffffffff82359388  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff82d9a1d8  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff82b57390  [pf purge]
   15     0     0     0  DL      -       0xffffffff8261122c  [soaiod4]
    9     0     0     0  DL      -       0xffffffff8261122c  [soaiod3]
    8     0     0     0  DL      -       0xffffffff8261122c  [soaiod2]
    7     0     0     0  DL      -       0xffffffff8261122c  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100034                   D       -       0xffffffff822310c0  [doneq0]
100067                   D       -       0xffffffff82230f90  [scanner]
    5     0     0     0  DL      crypto_ 0xfffff8000434bd90  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffff8000434bd30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff8262a7e0  [crypto]
   14     0     0     0  DL      seqstat 0xfffff800043e8c88  [sequencer 00]
   13     0     0     0  DL      (threaded)                  [geom]
100025                   D       -       0xffffffff82504770  [g_event]
100026                   D       -       0xffffffff82504778  [g_up]
100027                   D       -       0xffffffff82504780  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100018                   D       -       0xfffff800040dfe00  [thr_0]
100019                   D       -       0xfffff800040dfe80  [thr_1]
   12     0     0     0  WL      (threaded)                  [intr]
100011                   I                                   [swi5: fast taskq]
100015                   I                                   [swi6: task queue]
100016                   I                                   [swi6: Giant taskq]
100020                   I                                   [swi1: netisr 0]
100021                   I                                   [swi3: vm]
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]
100073                   I                                   [swi1: hpts]
100074                   I                                   [swi1: hpts]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffff80004319000  [init]
   10     0     0     0  DL      audit_w 0xffffffff8262ad00  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff82504d10  [swapper]
100005                   D       -       0xfffff8000421d000  [if_io_tqg_0]
100006                   D       -       0xfffff8000421ce00  [if_io_tqg_1]
100007                   D       -       0xfffff8000421cd00  [if_config_tqg_0]
100008                   D       -       0xfffff8000421cc00  [softirq_0]
100009                   D       -       0xfffff8000421cb00  [softirq_1]
100010                   D       -       0xfffff8000421ca00  [thread taskq]
100012                   D       -       0xfffff8000421c800  [inm_free taskq]
100013                   D       -       0xfffff8000421c700  [kqueue_ctx taskq]
100014                   D       -       0xfffff8000421c600  [aiod_kick taskq]
100017                   D       -       0xfffff8000421c300  [in6m_free taskq]
100024                   D       -       0xfffff8000421c200  [firmware taskq]
100029                   D       -       0xfffff8000421b700  [crypto_0]
100030                   D       -       0xfffff8000421b700  [crypto_1]
100044                   D       -       0xfffff8000421aa00  [vtnet0 rxq 0]
100045                   D       -       0xfffff8000421a900  [vtnet0 txq 0]
100046                   D       -       0xfffff8000421a800  [vtnet0 rxq 1]
100047                   D       -       0xfffff8000421a700  [vtnet0 txq 1]
100049                   D       vtbslp  0xfffff800041e8b80  [virtio_balloon]
100053                   D       -       0xfffff8000421a500  [mca taskq]
100057                   D       -       0xffffffff81cde9c1  [deadlkres]
100062                   D       -       0xfffff8000421a400  [acpi_task_0]
100063                   D       -       0xfffff8000421a400  [acpi_task_1]
100064                   D       -       0xfffff8000421a400  [acpi_task_2]
100066                   D       -       0xfffff8000421b100  [CAM taskq]
db> show all locks
Process 794 (dhclient) thread 0xfffffe00257cf500 (100098)
exclusive lockmgr bufwait (bufwait) r = 0 (0xfffffe0003e47200) locked @ /syzkaller/managers/i386/kernel/sys/ufs/ffs/ffs_softdep.c:14331
exclusive lockmgr bufwait (bufwait) r = 0 (0xfffffe0003e44e40) locked @ /syzkaller/managers/i386/kernel/sys/kern/vfs_bio.c:3870
exclusive lockmgr ufs (ufs) r = 0 (0xfffff8001f56d640) locked @ /syzkaller/managers/i386/kernel/sys/kern/vfs_syscalls.c:3491
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4214         4854K         4239
          tcp_hpts            5         3201K            5
             vtbuf           24         1968K           46
         sysctloid        28170         1644K        28234
              kobj          335         1340K          494
            newblk          350         1112K          401
          vfscache            4         1025K            4
          inodedep           65          544K           88
               pcb           25          541K          117
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          119          242K          875
            acpica         1674          185K        52414
         vnet_data            1          168K            1
           pagedep           18          133K           31
        tfo_ccache            1          128K            1
               sem            4          106K            4
            DEVFS1          102          102K          113
            linker          254           99K          285
               bus          975           79K         3020
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          505           64K          505
          filedesc            5           37K           35
               BPF           19           36K           19
              umtx          270           34K          270
              temp           23           33K         1629
           kdtrace          168           33K         1689
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          121           31K          131
               msg            4           30K            4
        DEVFS_RULE           56           27K           56
        gtaskqueue           18           26K           18
              vmem            3           22K            5
            kbdmux            6           22K            6
         ufs_mount            5           17K            6
              proc            3           17K            3
            ifaddr           43           17K           43
               tty           16           16K           16
           tidhash            1           16K            1
           ithread           99           16K           99
            bus-sc           30           14K         1405
            KTRACE          100           13K          100
              kenv           92           12K           92
      eventhandler          132           12K          132
         pfs_nodes           20           10K           20
              GEOM           60           10K          489
              rman           82           10K          423
         bmsafemap            2            9K           55
              UART           12            9K           12
           devstat            4            9K            4
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
     audit_evclass          233            8K          291
           lltable           20            7K           20
            dirrem           26            7K           37
             ifnet            4            7K            4
           CAM DEV            3            6K          510
       ether_multi           73            6K           78
                vt           11            6K           11
            kqueue           54            6K          812
              cred           21            6K          233
            sglist            5            6K            5
         CAM queue            5            6K         1528
         taskqueue           48            6K           48
         in6_multi           41            5K           41
            plimit           19            5K          344
       ufs_dirhash           24            5K           24
            diradd           33            5K           53
               UMA          251            5K          251
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
          routetbl           18            4K           18
          pf_ifnet            7            4K           10
         sctp_timw           13            4K           13
             hhook           13            4K           13
           session           23            3K           34
              pgrp           23            3K           34
           acpisem           22            3K           22
          terminal           11            3K           11
         proc-args           44            3K          504
            select           18            3K           18
           uidinfo            3            3K            8
             lockf           21            3K           28
         sctp_atcl            4            2K           40
         sctp_stro            2            2K           20
        local_apic            1            2K            1
           io_apic            1            2K            1
         ipsec-saq            2            2K            2
           CAM XPT           22            2K          543
            Unitno           26            2K           40
            ip6ndp            8            2K            9
             mkdir           10            2K           40
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
               msi            9            2K            9
          freefile            9            2K           18
             clone            9            2K            9
          sctp_ifa            8            1K           10
           softdep            1            1K            1
          indirdep            4            1K            4
            sahead            1            1K            1
          secasvar            1            1K            1
       vnodemarker            2            1K            8
      NFSD session            1            1K            1
        CAM periph            4            1K          271
         newdirblk            7            1K           20
             ipsec            3            1K            3
          in_multi            3            1K            4
             nhops            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           89
          pci_link           10            1K           10
 encap_export_host           12            1K           12
            crypto            3            1K            3
              pfil            4            1K            4
    chacha20random            1            1K            1
           CAM SIM            2            1K            2
              cdev            2            1K            2
          sctp_ifn            3            1K           10
               mld            3            1K            3
              igmp            3            1K            3
               tun            4            1K            4
               osd            3            1K            9
            DEVFSP            5            1K            5
       inpcbpolicy            9            1K          167
         sctp_atky            6            1K           60
            vnodes            1            1K            1
              ktls            1            1K            1
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            feeder            7            1K            7
        loginclass            3            1K            7
            prison            6            1K            6
            soname            5            1K         3093
     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           35
           tcpfunc            2            1K            2
          pmchooks            1            1K            1
          filecaps            5            1K           69
          nexusdev            5            1K            5
          sctp_vrf            1            1K            1
         sctp_athm            4            1K           40
          sctp_map            4            1K           40
           entropy            2            1K           38
              vnet            1            1K            1
          acpiintr            1            1K            1
               pmc            1            1K            1
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
               iov            1            1K        13357
          p1003.1b            1            1K            1
        sctp_mcore            0            0K            0
        sctp_socko            0            0K           20
         sctp_iter            0            0K            5
         sctp_mvrf            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            5
         sctp_aadr            0            0K            0
         sctp_stri            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
            vtfont            0            0K            0
        madt_table            0            0K            2
           ath_hal            0            0K            0
            athdev            0            0K            0
           ata_pci            0            0K            0
           ata_dma            0            0K            0
       ata_generic            0            0K            0
               amr            0            0K            0
           scsi_da            0            0K           69
            pvscsi            0            0K            0
          smartpqi            0            0K            0
            ata_da            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
              iavf            0            0K            0
               ixl            0            0K            0
           nvme_da            0            0K            0
           acpipwr            0            0K            0
            twsbuf            0            0K            0
      twe_commands            0            0K            0
      twa_commands            0            0K            0
        ice-resmgr            0            0K            0
         ice-osdep            0            0K            0
               ice            0            0K            0
       fpukern_ctx            0            0K            0
       tcp_log_dev            0            0K            0
          xen_intr            0            0K            0
      midi buffers            0            0K            0
             mixer            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            qpidrv            0            0K            0
              ac97            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
             hdacc            0            0K            0
              hdac            0            0K            0
              hdaa            0            0K            0
              isci            0            0K            0
      iommu_dmamap            0            0K            0
         acpi_perf            0            0K            0
     hyperv_socket            0            0K            0
           bxe_ilt            0            0K            0
            xenbus            0            0K            0
         acpicmbat            0            0K            0
       SIIS driver            0            0K            0
     vm_fictitious            0            0K            0
           CAM CCB            0            0K         1763
               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
           UMAHash            0            0K            0
ag_tgt_map_t malloc            0            0K            0
ag_slr_map_t malloc            0            0K            0
         vm_pgdata            0            0K            0
           jblocks            0            0K            0
          savedino            0            0K           13
          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
          freeblks            0            0K           34
          freefrag            0            0K            5
        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
             xform            0            0K            0
lDevFlags * malloc            0            0K            0
               NLM            0            0K            0
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             frag6            0            0K            0
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tiDeviceHandle_t * malloc            0            0K            0
               LRO            0            0K            0
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       ip_moptions            0            0K            0
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              ipid            0            0K            0
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         80211node            0            0K            0
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ag_portal_data_t malloc            0            0K            0
            statfs            0            0K          204
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        cl_savebuf            0            0K            2
ag_device_t malloc            0            0K            0
     STLock malloc            0            0K            0
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
      mbuf_cluster   2048    9526     126        9526       0     254   19767296        0
       mbuf_packet    256    8192    1206       22477       0     254    2405888        0
               512    512    4190      10        4196       0      30    2150400        0
          BUF TRIE    144     162   13306         424       0      62    1939392        0
              4096   4096     398       4        1697       0       2    1646592        0
               128    128    9206     125        9218       0     126    1194368        0
         sctp_asoc   2288       2     508          20       0     254    1166880        0
   mbuf_jumbo_page   4096       0     254          10       0     254    1040384        0
              pbuf    832       0     969           0       0       2     806208        0
       UMA Slabs 0    112    6526      20        6526       0     126     733152        0
           sctp_ep   1280       2     508          20       0     254     652800        0
             tcpcb   1040       3     514           7       0     254     537680        0
            socket    960      23     485        1260       0     254     487680        0
             65536  65536       6       0           6       0       1     393216        0
        sctp_raddr    736       2     515          20       0     254     380512        0
        RADIX NODE    144    2173     204       20633       0      62     342288        0
             VNODE    496     538      62         559       0      30     297600        0
        256 Bucket   2048     135       9         365       0       8     294912        0
         VM OBJECT    264    1005      45       13107       0      30     277200        0
     udplite_inpcb    488       2     510          20       0     254     249856        0
         tcp_inpcb    488       3     509           7       0     254     249856        0
         udp_inpcb    488       2     510         135       0     254     249856        0
            THREAD   1792     121      14         130       0       8     241920        0
            DEVCTL   1024       0     208         113       0       0     212992        0
              mbuf    256     397     375        1986       0     254     197632        0
                16     16   11828     422       11905       0     254     196000        0
                64     64    2707     128        2710       0     254     181440        0
               128    128    1265     130       27410       0     126     178560        0
         UMA Zones    768     226       1         226       0      16     174336        0
                32     32    4432     482        4492       0     254     157248        0
       FFS2 dinode    256     507      63         525       0      62     145920        0
             65536  65536       0       2         118       0       1     131072        0
             65536  65536       2       0           2       0       1     131072        0
             65536  65536       0       2          55       0       1     131072        0
              2048   2048       8      56        2580       0       8     131072        0
              1024   1024     107      21         118       0      16     131072        0
             unpcb    256      11     499        1054       0     254     130560        0
               256    256     429      81         510       0      62     130560        0
             ripcb    488       2     254           5       0     254     124928        0
         MAP ENTRY     96    1033     227       39173       0     126     120960        0
          ksiginfo    112      42    1002          61       0     126     116928        0
         vmem btag     56    1825     251        1825       0     254     116256        0
             g_bio    408       0     270        4703       0      30     110160        0
               128    128     639     136        1007       0     126      99200        0
             32768  32768       3       0           3       0       1      98304        0
       S VFS Cache    104     596     301        1155       0     126      93288        0
         FFS inode    160     507      68         526       0      62      92000        0
           VMSPACE   2536      29       7         788       0       4      91296        0
              8192   8192       8       3         117       0       1      90112        0
          syncache    168       0     528           5       0     254      88704        0
              PROC   1312      51      15         807       0       8      86592        0
        128 Bucket   1024      40      43         212       0      16      84992        0
          UMA Kegs    384     212       4         212       0      30      82944        0
         filedesc0   1080      52      18         808       0       8      75600        0
              4096   4096      14       4          27       0       2      73728        0
                64     64     512     559       14594       0     254      68544        0
               128    128     307     220         414       0     126      67456        0
               128    128     356     171         888       0     126      67456        0
             65536  65536       1       0           1       0       1      65536        0
             16384  16384       3       1         139       0       1      65536        0
               256    256     193      62        1765       0      62      65280        0
                64     64     504     315         939       0     254      52416        0
               256    256     128      67         141       0      62      49920        0
         32 Bucket    256      36     159         380       0      62      49920        0
           DIRHASH   1024      34      14          34       0      16      49152        0
             NAMEI   1024       0      48       12055       0      16      49152        0
             16384  16384       2       1          17       0       1      49152        0
             16384  16384       3       0           3       0       1      49152        0
              1024   1024      30      18          65       0      16      49152        0
               512    512      59      37         997       0      30      49152        0
               512    512      58      38          94       0      30      49152        0
               512    512      72      24          98       0      30      49152        0
              4096   4096       9       1           9       0       2      40960        0
            clpbuf    832       0      48          87       0      16      39936        0
              pipe    760      12      38         293       0      16      38000        0
         64 Bucket    512      61      11         428       0      30      36864        0
             selfd     64      40     527        3469       0     254      36288        0
                64     64     112     455         133       0     254      36288        0
                64     64      94     473         865       0     254      36288        0
                64     64      91     476         913       0     254      36288        0
                64     64     189     378         222       0     254      36288        0
                64     64      31     536          86       0     254      36288        0
               128    128     141     138         633       0     126      35712        0
               128    128      36     243          43       0     126      35712        0
               128    128      42     237          54       0     126      35712        0
     routing nhops    256      16     119          24       0      62      34560        0
           ttyoutq    256      72      63         160       0      62      34560        0
               256    256      18     117          44       0      62      34560        0
               256    256      74      61         653       0      62      34560        0
               256    256      30     105         194       0      62      34560        0
               256    256      17     118         355       0      62      34560        0
               256    256      56      79         373       0      62      34560        0
             32768  32768       0       1         112       0       1      32768        0
             16384  16384       1       1           4       0       1      32768        0
              8192   8192       4       0           4       0       1      32768        0
              2048   2048       3      13           3       0       8      32768        0
              2048   2048       6      10           6       0       8      32768        0
              2048   2048       6      10           6       0       8      32768        0
              2048   2048       3      13          22       0       8      32768        0
              1024   1024       6      26         180       0      16      32768        0
              1024   1024       7      25          12       0      16      32768        0
              1024   1024       8      24           9       0      16      32768        0
              1024   1024       6      26         915       0      16      32768        0
               512    512      13      51          37       0      30      32768        0
     mt_stats_zone     64     445      67         445       0     254      32768        0
           64 pcpu      8    3894     202        3898       0     254      32768        0
            ttyinq    160     135      65         300       0      62      32000        0
            cpuset    104       7     272           7       0     126      29016        0
        sctp_laddr     48       0     588           7       0     254      28224        0
         hostcache     96       1     293           1       0     254      28224        0
                32     32     296     586         580       0     254      28224        0
          4 Bucket     48       6     582        4561       0     254      28224        0
        KMAP ENTRY     96      12     279          12       0     126      27936        0
         TURNSTILE    136     136      53         136       0      62      25704        0
              8192   8192       3       0           3       0       1      24576        0
              4096   4096       4       2          73       0       2      24576        0
           rtentry    176      20     118          24       0      62      24288        0
          rl_entry     40      35     571          35       0     254      24240        0
             Files     80     102     198        6667       0     126      24000        0
          8 Bucket     80      61     239        6709       0     126      24000        0
       Mountpoints   2816       2       6           2       0       4      22528        0
        SLEEPQUEUE     88     136     120         136       0     126      22528        0
             udpcb     32       4     626         155       0     254      20160        0
               PWD     32      13     617         111       0     254      20160        0
                32     32      79     551          92       0     254      20160        0
                32     32      24     606         121       0     254      20160        0
                32     32      68     562         756       0     254      20160        0
                32     32      27     603        2674       0     254      20160        0
                32     32      34     596        1101       0     254      20160        0
         16 Bucket    144      36     104         129       0      62      20160        0
          2 Bucket     32      41     589        8698       0     254      20160        0
             KNOTE    160       8     117         101       0      62      20000        0
          procdesc    136       2     143           8       0      62      19720        0
 epoch_record pcpu    256       4      60           4       0      62      16384        0
             16384  16384       1       0           1       0       1      16384        0
              8192   8192       1       1           3       0       1      16384        0
              8192   8192       2       0           2       0       1      16384        0
              8192   8192       2       0           2       0       1      16384        0
              4096   4096       1       3         208       0       2      16384        0
              2048   2048       2       6           2       0       8      16384        0
              2048   2048       3       5         194       0       8      16384        0
              1024   1024       1      15           1       0      16      16384        0
               512    512       2      30           3       0      30      16384        0
           SMR CPU     32       2     509           2       0     254      16352        0
      vtnet_tx_hdr     24       0     668         958       0     254      16032        0
           mt_zone     24     445     223         445       0     254      16032        0
              kenv    258       3      57         999       0      30      15480        0
     FPU_save_area    832       1      17           1       0      16      14976        0
              vmem   1856       1       7           1       0       8      14848        0
        SMR SHARED     24       2     509           2       0     254      12264        0
                32     32      71     307         924       0     254      12096        0
                16     16      15     735         128       0     254      12000        0
                16     16     287     463         689       0     254      12000        0
                16     16      20     730          97       0     254      12000        0
                16     16      29     721          48       0     254      12000        0
                16     16     181     569        1120       0     254      12000        0
                16     16      15     735       23890       0     254      12000        0
                16     16      29     721         112       0     254      12000        0
       UMA Slabs 1    176       8      14           8       0      62       3872        0
          int pcpu      4      34     478          34       0     254       2048        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
sctp_stream_msg_out    112       0       0           0       0     254          0        0
        sctp_readq    152       0       0           0       0     254          0        0
        sctp_chunk    152       0       0           0       0     254          0        0
   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
       tcp_bbr_pcb    832       0       0           0       0      16          0        0
       tcp_bbr_map    128       0       0           0       0     126          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
tfo_ccache_entries     80       0       0           0       0     126          0        0
               tfo      4       0       0           0       0     254          0        0
          sackhole     32       0       0           0       0     254          0        0
             tcptw     88       0       0           0       0     254          0        0
               ipq     56       0       0           0       0     254          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
            itimer    352       0       0           0       0      30          0        0
            AIOLIO    280       0       0           0       0      30          0        0
             AIOCB    752       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    232       0       0           0       0      62          0        0
      TMPFS dirent     64       0       0           0       0     254          0        0
           NCLNODE    592       0       0           0       0      16          0        0
             rentr     24       0       0           0       0     254          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
         VNODEPOLL    120       0       0           0       0     126          0        0
    crypto_session     72       0       0           0       0     126          0        0
           cryptop    280       0       0           0       0      30          0        0
      nvme_request    128       0       0           0       0     126          0        0
   IOMMU_MAP_ENTRY    120       0       0           0       0     126          0        0
      ktls_session    192       0       0           0       0      62          0        0
    mbuf_jumbo_16k  16384       0       0           0       0     254          0        0
     mbuf_jumbo_9k   9216       0       0           0       0     254          0        0
      audit_record   1280       0       0           0       0       8          0        0
         domainset     40       0       0           0       0     254          0        0
        MAC labels     40       0       0           0       0     254          0        0
            vnpbuf    832       0       0           0       0      62          0        0
            mdpbuf    832       0       0           0       0       4          0        0
           nfspbuf    832       0       0           0       0      16          0        0
            swwbuf    832       0       0           0       0       8          0        0
            swrbuf    832       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
             65536  65536       0       0           0       0       1          0        0
             65536  65536       0       0           0       0       1          0        0
             65536  65536       0       0           0       0       1          0        0
             32768  32768       0       0           0       0       1          0        0
             32768  32768       0       0           0       0       1          0        0
             32768  32768       0       0           0       0       1          0        0
             32768  32768       0       0           0       0       1          0        0
             32768  32768       0       0           0       0       1          0        0
             32768  32768       0       0           0       0       1          0        0
             16384  16384       0       0           0       0       1          0        0
             16384  16384       0       0           0       0       1          0        0
             16384  16384       0       0           0       0       1          0        0
              8192   8192       0       0           0       0       1          0        0
              8192   8192       0       0           0       0       1          0        0
              4096   4096       0       0           0       0       2          0        0
              4096   4096       0       0           0       0       2          0        0
              4096   4096       0       0           0       0       2          0        0
              2048   2048       0       0           0       0       8          0        0
              1024   1024       0       0           0       0      16          0        0
               512    512       0       0           0       0      30          0        0
               512    512       0       0           0       0      30          0        0
            fakepg    104       0       0           0       0     126          0        0
          UMA Hash    256       0       0           0       0      62          0        0

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/10/10 05:40 freebsd ec44b813f3b8 93817d89 console log report syz ci-freebsd-i386
2021/06/24 04:16 freebsd-src f13da24715a7 fe4ab389 console log report ci-freebsd-i386 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:NUM
2021/05/08 08:06 freebsd-src ac200a9c3847 bc5434be console log report ci-freebsd-i386 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:NUM
2021/04/29 15:34 freebsd-src a4b5f7ba3e9b 77e2b668 console log report ci-freebsd-i386 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:NUM
2021/04/28 04:12 freebsd-src 1b00608b264f 805b5003 console log report ci-freebsd-i386 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:NUM
2021/04/18 03:29 freebsd-src 0f29396e493b 7e2b734b console log report ci-freebsd-i386 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:NUM
2021/04/01 02:48 freebsd-src baacf701372b 6a81331a console log report ci-freebsd-i386 panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:NUM
2020/09/29 07:37 freebsd 021ba9101bdd 1b88c6d5 console log report ci-freebsd-i386
* Struck through repros no longer work on HEAD.