syzbot


panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE (2)

Status: closed as dup on 2021/09/08 20:33
Reported-by: syzbot+57de74e8ea2da0cc4192@syzkaller.appspotmail.com
First crash: 1284d, last: 973d
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 954d 1840d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
freebsd panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE 1 1393d 1393d 0/2 auto-closed as invalid on 2020/09/02 07:17

Sample crash report:
panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4859
cpuid = 0
time = 1620310526
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe008853d400
vpanic() at vpanic+0x1c7/frame 0xfffffe008853d460
panic() at panic+0x43/frame 0xfffffe008853d4c0
__mtx_lock_flags() at __mtx_lock_flags+0x202/frame 0xfffffe008853d520
sctp_free_assoc() at sctp_free_assoc+0x83e/frame 0xfffffe008853d5b0
sctp_lower_sosend() at sctp_lower_sosend+0x21bd/frame 0xfffffe008853d7a0
sctp_sosend() at sctp_sosend+0x4fc/frame 0xfffffe008853d8d0
sosend() at sosend+0xc6/frame 0xfffffe008853d940
kern_sendit() at kern_sendit+0x35b/frame 0xfffffe008853d9f0
sendit() at sendit+0x229/frame 0xfffffe008853da50
sys_sendmsg() at sys_sendmsg+0x8b/frame 0xfffffe008853dab0
amd64_syscall() at amd64_syscall+0x247/frame 0xfffffe008853dbf0
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe008853dbf0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x285e1a, rsp = 0x7fffdfffdf08, rbp = 0x7fffdfffdf70 ---
KDB: enter: panic
[ thread pid 871 tid 100170 ]
Stopped at      kdb_enter+0x67: movq    $0,0x163a5ae(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                        0x28
rax                       0x12
rcx                       0x80
rdx         0xffffffff819c182a
rbx                          0
rsp         0xfffffe008853d3e0
rbp         0xfffffe008853d400
rsi                        0x1
rdi                          0
r8                           0
r9          0x8080808080808080
r10         0xfffffe008853d2d0
r11              0x1ff77fff59c
r12         0xffffffff82267ac0  ddb_dbbe
r13                          0
r14         0xffffffff81a72b70
r15         0xffffffff81a72b70
rip         0xffffffff8112ebd7  kdb_enter+0x67
rflags                    0x82
kdb_enter+0x67: movq    $0,0x163a5ae(%rip)
db> show proc
Process 871 (syz-executor.1) at 0xfffff8002ea67a70:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 789 at 0xfffff80004f38538
 ABI: FreeBSD ELF64
 flag: 0x10000080  flag2: 0
 arguments: /root/syz-executor.1
 reaper: 0xfffff8000452a538 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe0094c533e0
   (map 0xfffffe0094c533e0)
   (map.pmap 0xfffffe0094c534a0)
   (pmap 0xfffffe0094c53500)
 threads: 3
100157                   Run     CPU 1                       syz-executor.1
100170                   Run     CPU 0                       syz-executor.1
100175                   RunQ                                syz-executor.1
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  875   791   791     0  R                                   syz-executor.0
  874   793   793     0  R       (threaded)                  syz-executor.2
100090                   RunQ                                syz-executor.2
100174                   S       uwait   0xfffff80004ffb300  syz-executor.2
  871   789   789     0  R       (threaded)                  syz-executor.1
100157                   Run     CPU 1                       syz-executor.1
100170                   Run     CPU 0                       syz-executor.1
100175                   RunQ                                syz-executor.1
  866   846   866     0  Ss      select  0xfffff8002ea68a40  dhclient
  856     1   856     0  Ss      select  0xfffff8002ea68ac0  dhclient
  846   830   436    65  S       select  0xfffff8002ea68b40  dhclient
  830   436   436     0  S       wait    0xfffff8002e5f6000  sh
  793   787   793     0  Ss      nanslp  0xffffffff8273c8e1  syz-executor.2
  791   787   791     0  Rs                                  syz-executor.0
  790   787   790     0  Rs                                  syz-executor.3
  789   787   789     0  Ss      nanslp  0xffffffff8273c8e0  syz-executor.1
  787   785   785     0  S       (threaded)                  syz-execprog
100115                   S       uwait   0xfffff80004d03a80  syz-execprog
100117                   S       uwait   0xfffff80004ffbc00  syz-execprog
100118                   S       uwait   0xfffff80004ffbd00  syz-execprog
100119                   S       kqread  0xfffff80004fa9a00  syz-execprog
100120                   S       uwait   0xfffff80028060380  syz-execprog
100121                   S       uwait   0xfffff80028060480  syz-execprog
100122                   S       uwait   0xfffff80028060580  syz-execprog
100123                   S       uwait   0xfffff80004d03200  syz-execprog
100124                   S       uwait   0xfffff8002e663d80  syz-execprog
100125                   S       uwait   0xfffff8002e663e80  syz-execprog
  785   783   785     0  Ss      pause   0xfffff80004f38b20  csh
  783   694   783     0  Ss      select  0xfffff80004ffb7c0  sshd
  760     1   760     0  Ss+     ttyin   0xfffff800049d8cb0  getty
  759     1   759     0  Ss+     ttyin   0xfffff80004cf48b0  getty
  758     1   758     0  Ss+     ttyin   0xfffff80004cf4cb0  getty
  757     1   757     0  Ss+     ttyin   0xfffff80004cfc0b0  getty
  756     1   756     0  Ss+     ttyin   0xfffff80004cfc4b0  getty
  755     1   755     0  Ss+     ttyin   0xfffff80004cfc8b0  getty
  754     1   754     0  Ss+     ttyin   0xfffff80004cfccb0  getty
  753     1   753     0  Ss+     ttyin   0xfffff80004c6e0b0  getty
  752     1   752     0  Ss+     ttyin   0xfffff80004c6e4b0  getty
  750     1    24     0  S+      piperd  0xfffff800280f22e8  logger
  749   748    24     0  S+      nanslp  0xffffffff8273c8e0  sleep
  748     1    24     0  S+      wait    0xfffff8002e55aa70  sh
  698     1   698     0  Ss      nanslp  0xffffffff8273c8e0  cron
  694     1   694     0  Ss      select  0xfffff80028060640  sshd
  507     1   507     0  Ss      select  0xfffff800280606c0  syslogd
  436     1   436     0  Ss      wait    0xfffff8002804b000  devd
  435     1   435    65  Ss      select  0xfffff80028060840  dhclient
  350     1   350     0  Ss      select  0xfffff80028060740  dhclient
  347     1   347     0  Ss      select  0xfffff80028060940  dhclient
   23     0     0     0  DL      syncer  0xffffffff8282bd50  [syncer]
   22     0     0     0  DL      vlruwt  0xfffff80004e93a70  [vnlru]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100080                   D       qsleep  0xffffffff8282ae00  [bufdaemon]
100085                   D       -       0xffffffff8220ae00  [bufspacedaemon-0]
100097                   D       sdflush 0xfffff80004fb1ce8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff82852c08  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100078                   D       psleep  0xffffffff82847078  [dom0]
100086                   D       launds  0xffffffff82847084  [laundry: dom0]
100087                   D       umarcl  0xffffffff815c8de0  [uma]
   18     0     0     0  DL      -       0xffffffff82570c78  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff82f19828  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff82d793c0  [pf purge]
   15     0     0     0  DL      -       0xffffffff8282845c  [soaiod4]
    9     0     0     0  DL      -       0xffffffff8282845c  [soaiod3]
    8     0     0     0  DL      -       0xffffffff8282845c  [soaiod2]
    7     0     0     0  DL      -       0xffffffff8282845c  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100043                   D       -       0xffffffff82448140  [doneq0]
100044                   D       -       0xffffffff824480c0  [async]
100077                   D       -       0xffffffff82447f90  [scanner]
   14     0     0     0  DL      seqstat 0xfffff8000463a888  [sequencer 00]
    5     0     0     0  DL      crypto_ 0xfffff8000462ed80  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffff8000462ed30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff828445a0  [crypto]
   13     0     0     0  DL      (threaded)                  [geom]
100034                   D       -       0xffffffff8271c120  [g_event]
100035                   D       -       0xffffffff8271c128  [g_up]
100036                   D       -       0xffffffff8271c130  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100027                   D       -       0xfffff80004574700  [thr_0]
100028                   D       -       0xfffff80004574780  [thr_1]
   12     0     0     0  WL      (threaded)                  [intr]
100012                   I                                   [swi6: task queue]
100016                   I                                   [swi6: Giant taskq]
100018                   I                                   [swi5: fast taskq]
100029                   I                                   [swi1: netisr 0]
100030                   I                                   [swi3: vm]
100031                   I                                   [swi4: clock (0)]
100032                   I                                   [swi4: clock (1)]
100045                   I                                   [irq24: virtio_pci0]
100046                   I                                   [irq25: virtio_pci0]
100047                   I                                   [irq26: virtio_pci0]
100048                   I                                   [irq27: virtio_pci0]
100049                   I                                   [irq28: virtio_pci1]
100050                   I                                   [irq29: virtio_pci1]
100051                   I                                   [irq30: virtio_pci1]
100052                   I                                   [irq31: virtio_pci1]
100053                   I                                   [irq32: virtio_pci1]
100058                   I                                   [irq10: virtio_pci2]
100060                   I                                   [irq1: atkbd0]
100061                   I                                   [irq12: psm0]
100062                   I                                   [swi0: uart uart++]
100070                   I                                   [swi1: pf send]
100083                   I                                   [swi1: hpts]
100084                   I                                   [swi1: hpts]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffff8000452a538  [init]
   10     0     0     0  DL      audit_w 0xffffffff82844ab0  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff8271c6b0  [swapper]
100005                   D       -       0xfffff80004144800  [softirq_0]
100006                   D       -       0xfffff80004144700  [softirq_1]
100007                   D       -       0xfffff80004144600  [if_io_tqg_0]
100008                   D       -       0xfffff80004144500  [if_io_tqg_1]
100009                   D       -       0xfffff80004144400  [if_config_tqg_0]
100010                   D       -       0xfffff8000457a600  [kqueue_ctx taskq]
100011                   D       -       0xfffff8000457a500  [in6m_free taskq]
100013                   D       -       0xfffff8000457a200  [linuxkpi_irq_wq]
100014                   D       -       0xfffff8000457a100  [inm_free taskq]
100015                   D       -       0xfffff8000457a000  [aiod_kick taskq]
100017                   D       -       0xfffff80004574c00  [thread taskq]
100019                   D       -       0xfffff80004574900  [linuxkpi_short_wq_0]
100020                   D       -       0xfffff80004574900  [linuxkpi_short_wq_1]
100021                   D       -       0xfffff80004574900  [linuxkpi_short_wq_2]
100022                   D       -       0xfffff80004574900  [linuxkpi_short_wq_3]
100023                   D       -       0xfffff80004574800  [linuxkpi_long_wq_0]
100024                   D       -       0xfffff80004574800  [linuxkpi_long_wq_1]
100025                   D       -       0xfffff80004574800  [linuxkpi_long_wq_2]
100026                   D       -       0xfffff80004574800  [linuxkpi_long_wq_3]
100033                   D       -       0xfffff80004574100  [firmware taskq]
100037                   D       -       0xfffff8000462de00  [crypto_0]
100038                   D       -       0xfffff8000462de00  [crypto_1]
100054                   D       -       0xfffff8000462d800  [vtnet0 rxq 0]
100055                   D       -       0xfffff8000462d700  [vtnet0 txq 0]
100056                   D       -       0xfffff8000462d600  [vtnet0 rxq 1]
100057                   D       -       0xfffff8000462d500  [vtnet0 txq 1]
100059                   D       vtbslp  0xfffff80004974100  [virtio_balloon]
100063                   D       -       0xfffff80004973b00  [mca taskq]
100066                   D       -       0xffffffff81e1f4b0  [deadlkres]
100072                   D       -       0xfffff80004c3e700  [acpi_task_0]
100073                   D       -       0xfffff80004c3e700  [acpi_task_1]
100074                   D       -       0xfffff80004c3e700  [acpi_task_2]
100076                   D       -       0xfffff8000462dd00  [CAM taskq]
db> show all locks
Process 871 (syz-executor.1) thread 0xfffffe0094c06720 (100170)
exclusive sleep mutex sctp-send-tcb (tcbs) r = 0 (0xfffffe0094c4dc90) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4698
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe0094c4dc70) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4339
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4216         4340K         4241
          tcp_hpts            5         3201K            5
         sysctloid        33530         1980K        33597
             vtbuf           24         1968K           46
              kobj          332         1328K          492
            newblk          451         1137K          530
          vfscache            3         1025K            3
          inodedep           99          549K          123
               pcb           30          544K          208
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          121          252K          940
            acpica         1674          184K        55406
         vnet_data            1          168K            1
           tidhash            3          141K            3
           pagedep           26          135K           59
        tfo_ccache            1          128K            1
          filedesc           16          121K          126
            DEVFS1          107          107K          124
               sem            4          106K            4
            linker          294          102K          330
               bus          995           81K         3509
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          508           64K          508
              umtx          308           39K          308
           kdtrace          194           38K         1052
               BPF           22           36K           22
              temp           35           33K         1922
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          126           32K          136
               msg            4           30K            4
              vmem            3           26K            4
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
        DEVFS_RULE           56           20K           56
            ifaddr           67           19K           69
         ufs_mount            5           17K            6
              proc            3           17K            3
               tty           16           16K           16
          routetbl          127           16K          399
           ithread           99           16K           99
            bus-sc           33           14K         1719
           lltable           43           14K           43
            KTRACE          100           13K          100
             ifnet            7           13K            7
       ether_multi          152           13K          162
              kenv           93           12K           93
            dirrem           45           12K           56
      eventhandler          133           12K          133
              rman           84           10K          425
              GEOM           60           10K          489
         in6_multi           65            9K           65
         bmsafemap            3            9K           92
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K            1
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
         pfs_nodes           20            8K           20
     audit_evclass          236            8K          294
         sctp_timw           28            7K           28
            diradd           50            7K           90
            sglist            5            7K            5
           CAM DEV            3            6K          510
              cred           24            6K          250
         taskqueue           57            6K           57
            kqueue           59            6K          880
            plimit           22            6K          380
         CAM queue            5            6K         1528
       ufs_dirhash           24            5K           24
               UMA          265            5K          265
          pf_ifnet           10            5K           19
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
           pwddesc           57            4K          876
             mkdir           28            4K           96
          freefile           28            4K           37
           acpisem           28            4K           28
           session           26            4K           38
             hhook           13            4K           13
       fpukern_ctx            3            3K            3
          terminal           11            3K           11
         proc-args           47            3K          572
          indirdep           10            3K           10
           uidinfo            3            3K            9
             lockf           20            3K           33
        local_apic            1            2K            1
           io_apic            1            2K            1
         newdirblk           16            2K           48
         ipsec-saq            2            2K            2
             selfd           31            2K         9682
            ip6ndp           12            2K           13
            Unitno           29            2K           47
          sctp_ifa           13            2K           14
           CAM XPT           22            2K          543
         sctp_atcl            4            2K          122
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
            select           10            2K           34
               msi            9            2K            9
             clone            9            2K            9
               tun            7            2K            7
         sctp_stro            1            1K           61
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           10
      NFSD session            1            1K            1
        CAM periph            4            1K          271
             ipsec            3            1K            3
          sctp_ifn            6            1K           14
               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
            DEVFSP           10            1K           15
            crypto            4            1K            4
 encap_export_host           12            1K           12
       inpcbpolicy           16            1K          236
              pfil            4            1K            4
           CAM SIM            2            1K            2
              cdev            2            1K            2
    chacha20random            1            1K            1
               osd            3            1K           10
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            vnodes            1            1K            1
              ktls            1            1K            1
          procdesc            2            1K            8
            feeder            7            1K            7
         sctp_atky            5            1K          183
           tcpfunc            3            1K            3
        loginclass            3            1K            7
            prison            6            1K            6
             linux            5            1K            6
        aesni_data            2            1K            2
            apmdev            1            1K            1
          atkbddev            2            1K            2
     CAM dev queue            2            1K            2
 CAM I/O Scheduler            1            1K            1
          freefrag            1            1K            6
             xform            2            1K           49
          CAM path            4            1K         1034
            soname            5            1K         3326
          pmchooks            1            1K            1
          filecaps            5            1K           72
          nexusdev            7            1K            7
          sctp_vrf            1            1K            1
         sctp_athm            4            1K          122
              vnet            1            1K            1
           entropy            2            1K           42
          acpiintr            1            1K            1
               pmc            1            1K            1
          sctp_map            2            1K          122
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          freework            1            1K           54
               iov            1            1K        14248
          p1003.1b            1            1K            1
            mqdata            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K            0
         sctp_iter            0            0K            7
         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            7
         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
       NFSD string            0            0K            0
       NFSD V4lock            0            0K            0
        madt_table            0            0K            2
          smartpqi            0            0K            0
      NFSD V4state            0            0K            0
     NFSD srvcache            0            0K            0
       msdosfs_fat            0            0K            0
     msdosfs_mount            0            0K            0
      msdosfs_node            0            0K            0
              iavf            0            0K            0
               ixl            0            0K            0
            DEVFS4            0            0K            0
            DEVFS2            0            0K            0
            gntdev            0            0K            0
       privcmd_dev            0            0K            0
        ice-resmgr            0            0K            0
         ice-osdep            0            0K            0
               ice            0            0K            0
             axgbe            0            0K            0
        evtchn_dev            0            0K            0
          xenstore            0            0K            0
         ciss_data            0            0K            0
         BACKLIGHT            0            0K            0
               xnb            0            0K            0
              xbbd            0            0K            0
               xbd            0            0K            0
           Balloon            0            0K            0
          sysmouse            0            0K            0
            vtfont            0            0K            0
          xen_intr            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            qpidrv            0            0K            0
           ath_hal            0            0K            0
            athdev            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
           ata_pci            0            0K            0
           ata_dma            0            0K            0
       ata_generic            0            0K            0
              isci            0            0K            0
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        80211power            0            0K            0
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         80211perr            0            0K            0
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            statfs            0            0K          225
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              hdac            0            0K            0
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agtiapi_MemAlloc malloc            0            0K            0
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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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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8320     519       12212       0     254   36204544        0
              pbuf   2624       0     989           0       0       2    2595136        0
              mbuf    256    8611     494       14153       0     254    2330880        0
          BUF TRIE    144     176   13292         390       0      62    1939392        0
        malloc-384    384    4116       4        4116       0      30    1582080        0
        malloc-128    128   10993      12       11008       0     126    1408640        0
       malloc-4096   4096     332       1         492       0       2    1363968        0
       UMA Slabs 0    112    9678       3        9678       0     126    1084272        0
         FFS inode   1160     525      21         562       0       8     633360        0
            lkpimm    160       1    2324           1       0      62     372000        0
          lkpicurr    160       2    2323           2       0      62     372000        0
        RADIX NODE    144    2364     181       23406       0      62     366480        0
         VM OBJECT    264    1062      48       14402       0      30     293040        0
       malloc-4096   4096      67       3         886       0       2     286720        0
            THREAD   1808     136      18         175       0       8     278432        0
             VNODE    448     560      43         599       0      30     270144        0
         malloc-64     64    4000     158        5124       0     254     266112        0
      malloc-65536  65536       4       0           4       0       1     262144        0
      malloc-16384  16384      11       4         241       0       1     245760        0
        256 Bucket   2048     106      12        9872       0       8     241664        0
         malloc-16     16   13714     286       13919       0     254     224000        0
            DEVCTL   1024      10     206         132       0       0     221184        0
      malloc-65536  65536       1       2         205       0       1     196608        0
         UMA Zones    768     237       2         237       0      16     183552        0
        malloc-128    128    1415      11       29277       0     126     182528        0
         malloc-32     32    5176     242        6101       0     254     173376        0
        malloc-256    256     578      22        1038       0      62     153600        0
       FFS2 dinode    256     525      15         562       0      62     138240        0
      malloc-65536  65536       2       0           2       0       1     131072        0
        malloc-128    128    1002      21        2062       0     126     130944        0
         MAP ENTRY     96    1124     178       43109       0     126     124992        0
       malloc-1024   1024     108       8         128       0      16     118784        0
       S VFS Cache    104    1007     124        1076       0     126     117624        0
          ksiginfo    112      44    1000          72       0     126     116928        0
         vmem btag     56    1978      98        1978       0     254     116256        0
           VMSPACE   2544      34       8         854       0       4     106848        0
       malloc-8192   8192       9       4         138       0       1     106496        0
       malloc-2048   2048       2      44        1777       0       8      94208        0
          UMA Kegs    384     222       1         222       0      30      85632        0
              PROC   1336      56       7         875       0       8      84168        0
         filedesc0   1072      57      13         876       0       8      75040        0
       malloc-4096   4096      15       3         114       0       2      73728        0
             g_bio    408       0     180        4613       0      30      73440        0
      mbuf_cluster   2048      30       2          30       0     254      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       0       1           8       0       1      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       0       2         130       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
        malloc-256    256     219      21         896       0      62      61440        0
        128 Bucket   1024      36      19         613       0      16      56320        0
        malloc-384    384     132       8         179       0      30      53760        0
      malloc-16384  16384       3       0           3       0       1      49152        0
       malloc-4096   4096      11       1         543       0       2      49152        0
       malloc-2048   2048       4      20         511       0       8      49152        0
            socket    944      28      20        1452       0     254      45312        0
         malloc-64     64     570     123       15524       0     254      44352        0
        malloc-128    128     298      43         455       0     126      43648        0
        malloc-384    384      84      26         202       0      30      42240        0
        malloc-256    256     153      12         178       0      62      42240        0
         32 Bucket    256      46     119        2442       0      62      42240        0
            clpbuf   2624       0      16          14       0      16      41984        0
           DIRHASH   1024      34       6          34       0      16      40960        0
       malloc-8192   8192       5       0           5       0       1      40960        0
            pcpu-8      8    4577     543        4733       0     254      40960        0
             NAMEI   1024       0      36       13309       0      16      36864        0
        malloc-512    512       4      68         512       0      30      36864        0
         64 Bucket    512      55      17        1429       0      30      36864        0
         malloc-64     64     485      82         702       0     254      36288        0
        malloc-128    128     117     162         464       0     126      35712        0
        malloc-256    256     110      25         238       0      62      34560        0
      malloc-32768  32768       1       0           1       0       1      32768        0
       malloc-8192   8192       3       1           5       0       1      32768        0
       malloc-2048   2048       6      10          64       0       8      32768        0
           pcpu-64     64     478      34         478       0     254      32768        0
       malloc-4096   4096       4       3         232       0       2      28672        0
       malloc-2048   2048      11       3         108       0       8      28672        0
         TURNSTILE    136     155      34         155       0      62      25704        0
       malloc-1024   1024      10      14        1236       0      16      24576        0
       malloc-1024   1024      18       6          22       0      16      24576        0
            ttyinq    160     135      15         300       0      62      24000        0
             tcpcb   1048       3      19           7       0     254      23056        0
           ttyoutq    256      72      18         160       0      62      23040        0
        malloc-384    384      52       8          52       0      30      23040        0
         sctp_asoc   2288       1       9          61       0     254      22880        0
       malloc-2048   2048       2       8         281       0       8      20480        0
       Mountpoints   2752       2       5           2       0       4      19264        0
           sctp_ep   1280       3      12          61       0     254      19200        0
        malloc-256    256      33      42         390       0      62      19200        0
        malloc-256    256      40      35         403       0      62      19200        0
              pipe    744      21       4         315       0      16      18600        0
        SLEEPQUEUE     88     155      37         155       0     126      16896        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-2048   2048       6       2           6       0       8      16384        0
       malloc-1024   1024      12       4          12       0      16      16384        0
       malloc-1024   1024      11       5          11       0      16      16384        0
        sctp_raddr    736       1      21          61       0     254      16192        0
         malloc-64     64      79     173        9759       0     254      16128        0
         malloc-64     64     136     116         192       0     254      16128        0
         malloc-32     32     412      92         586       0     254      16128        0
             Files     80     131      69        7384       0     126      16000        0
         udp_inpcb    488       6      26         165       0     254      15616        0
        malloc-256    256      48      12         680       0      62      15360        0
       malloc-2048   2048       5       1         196       0       8      12288        0
       malloc-1024   1024       6       6          82       0      16      12288        0
       malloc-1024   1024       8       4           9       0      16      12288        0
        malloc-512    512       3      21         193       0      30      12288        0
         malloc-64     64     138      51        1807       0     254      12096        0
         malloc-64     64      29     160         333       0     254      12096        0
         malloc-32     32     116     262        4103       0     254      12096        0
          8 Bucket     80      44     106         449       0     126      12000        0
     udplite_inpcb    488       5      19          59       0     254      11712        0
              kenv    258      15      30        1053       0      30      11610        0
             unpcb    256      11      34        1129       0     254      11520        0
        malloc-384    384      21       9         368       0      30      11520        0
        malloc-256    256      14      31         134       0      62      11520        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-1024   1024       0       8           6       0      16       8192        0
        malloc-512    512       8       8          16       0      30       8192        0
        malloc-512    512       8       8           8       0      30       8192        0
           rtentry    176      30      16          34       0      62       8096        0
              PGRP     88      26      66          38       0     126       8096        0
          rl_entry     40      39     163          39       0     254       8080        0
        sctp_laddr     48       0     168          12       0     254       8064        0
             udpcb     32       7     245         224       0     254       8064        0
               PWD     32      17     235         142       0     254       8064        0
         malloc-64     64       8     118           9       0     254       8064        0
         malloc-32     32       6     246          11       0     254       8064        0
         malloc-32     32      37     215         769       0     254       8064        0
         malloc-32     32      32     220         209       0     254       8064        0
         16 Bucket    144      35      21         200       0      62       8064        0
          4 Bucket     48       6     162          58       0     254       8064        0
          2 Bucket     32      43     209         527       0     254       8064        0
      vtnet_tx_hdr     24       0     334         790       0     254       8016        0
             KNOTE    160      26      24         286       0      62       8000        0
         malloc-16     16       1     499           4       0     254       8000        0
         malloc-16     16      20     480          59       0     254       8000        0
         malloc-16     16     316     184         646       0     254       8000        0
         malloc-16     16      27     473          28       0     254       8000        0
         malloc-16     16     188     312        1443       0     254       8000        0
         malloc-16     16      33     467       25562       0     254       8000        0
         malloc-16     16      14     486          20       0     254       8000        0
        malloc-128    128       9      53          16       0     126       7936        0
        malloc-128    128      57       5         102       0     126       7936        0
        malloc-128    128       8      54         105       0     126       7936        0
             ripcb    488       2      14           5       0     254       7808        0
         tcp_inpcb    488       3      13           7       0     254       7808        0
     routing nhops    256      27       3          34       0      62       7680        0
       mbuf_packet    256       1      29         142       0     254       7680        0
        malloc-384    384       0      20          27       0      30       7680        0
        malloc-384    384      20       0          20       0      30       7680        0
     FPU_save_area    832       1       8           1       0      16       7488        0
            cpuset    104       7      55           7       0     126       6448        0
 epoch_record pcpu    256       4      12           4       0      62       4096        0
       malloc-4096   4096       0       1           3       0       2       4096        0
       malloc-2048   2048       1       1           1       0       8       4096        0
        malloc-512    512       0       8           2       0      30       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
         hostcache     64       1      62           1       0     254       4032        0
          syncache    168       0      24           5       0     254       4032        0
         malloc-32     32       0     126           2       0     254       4032        0
         malloc-32     32     110      16         288       0     254       4032        0
       UMA Slabs 1    176       9      13           9       0      62       3872        0
        malloc-384    384       1       9           2       0      30       3840        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       3      60           3       0     254       2016        0
        SMR SHARED     24       3      60           3       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
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_rack_pcb    704       0       0           0       0      16          0        0
      tcp_rack_map    120       0       0           0       0     126          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
           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
            itimer    352       0       0           0       0      30          0        0
            AIOLIO    272       0       0           0       0      30          0        0
             AIOCB    552       0       0           0       0      16          0        0
              AIOP     32       0       0           0       0     254          0        0
               AIO    208       0       0           0       0      62          0        0
           NCLNODE    584       0       0           0       0      16          0        0
        mqnotifier    216       0       0           0       0      62          0        0
            mvdata     64       0       0           0       0     254          0        0
            mqueue    248       0       0           0       0      62          0        0
        TMPFS node    224       0       0           0       0      62          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
       L VFS Cache    320       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
           cryptop    280       0       0           0       0      30          0        0
  linux_dma_object     24       0       0           0       0     254          0        0
  linux_dma_pctrie    144       0       0           0       0      62          0        0
   IOMMU_MAP_ENTRY    120       0       0           0       0     126          0        0
      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   2624       0       0           0       0      64          0        0
            mdpbuf   2624       0       0           0       0       3          0        0
           nfspbuf   2624       0       0           0       0      16          0        0
            swwbuf   2624       0       0           0       0       8          0        0
            swrbuf   2624       0       0           0       0      16          0        0
          umtx_shm     88       0       0           0       0     126          0        0
           umtx pi     96       0       0           0       0     126          0        0
rangeset pctrie nodes    144       0       0           0       0      62          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          0        0
       malloc-4096   4096       0       0           0       0       2          0        0
       malloc-4096   4096       0       0           0       0       2          0        0
        malloc-512    512       0       0           0       0      30          0        0
        malloc-512    512       0       0           0       0      30          0        0
        malloc-512    512       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 (10):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/05/06 14:19 freebsd-src 49c894ddced5 06c27ff5 console log report syz ci-freebsd-main panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE
2021/07/28 19:16 freebsd-src ac959cf54421 9a4781d4 console log report ci-freebsd-main panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE
2021/06/10 23:38 freebsd-src cedaad93176e 1ba81399 console log report ci-freebsd-main panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE
2021/05/17 22:28 freebsd-src 4224dbf4c7c4 a343ba6b console log report ci-freebsd-main panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE
2021/05/07 16:25 freebsd-src fb53b42e36a9 f6da8120 console log report ci-freebsd-main panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE
2021/05/06 13:59 freebsd-src 49c894ddced5 06c27ff5 console log report ci-freebsd-main panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE
2021/02/16 01:23 freebsd-src 5dce03847fdc 98682e5e console log report ci-freebsd-main panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE
2021/02/01 23:14 freebsd-src 69c5fa5cd1ec e6b95f32 console log report ci-freebsd-main panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:LINE
2020/12/14 00:46 freebsd e8057a638eef 8f160dd5 console log report ci-freebsd-main
2020/09/20 21:36 freebsd 2dcac7a412a8 9564d2e9 console log report ci-freebsd-main
* Struck through repros no longer work on HEAD.