syzbot


panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb. (3)

Status: upstream: reported syz repro on 2022/09/11 14:28
Reported-by: syzbot+b140e81a6b52f2e3c4a7@syzkaller.appspotmail.com
First crash: 585d, last: 85d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
freebsd panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb. (2) 3 1038d 1087d 0/2 auto-closed as invalid on 2021/09/13 23:18
freebsd panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb. 3 1235d 1267d 0/2 auto-closed as invalid on 2021/02/28 18:58

Sample crash report:
panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3371

cpuid = 0
time = 1706119884
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0053fb1bb0
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0053fb1d10
vpanic() at vpanic+0x271/frame 0xfffffe0053fb1eb0
panic() at panic+0xb5/frame 0xfffffe0053fb1f70
__mtx_lock_sleep() at __mtx_lock_sleep+0xa94/frame 0xfffffe0053fb20b0
__mtx_lock_flags() at __mtx_lock_flags+0x23c/frame 0xfffffe0053fb21a0
sctp_inpcb_free() at sctp_inpcb_free+0x6ea/frame 0xfffffe0053fb2230
sctp_free_assoc() at sctp_free_assoc+0x41c6/frame 0xfffffe0053fb2370
sctp_load_addresses_from_init() at sctp_load_addresses_from_init+0x1d58/frame 0xfffffe0053fb3180
sctp_handle_init_ack() at sctp_handle_init_ack+0x51a/frame 0xfffffe0053fb32b0
sctp_process_control() at sctp_process_control+0x318a/frame 0xfffffe0053fb37c0
sctp_common_input_processing() at sctp_common_input_processing+0xbff/frame 0xfffffe0053fb3a20
sctp_input_with_port() at sctp_input_with_port+0x5ab/frame 0xfffffe0053fb3bb0
sctp_input() at sctp_input+0x31/frame 0xfffffe0053fb3bd0
ip_input() at ip_input+0xacd/frame 0xfffffe0053fb3cf0
swi_net() at swi_net+0x2f3/frame 0xfffffe0053fb3d90
ithread_loop() at ithread_loop+0x4eb/frame 0xfffffe0053fb3ef0
fork_exit() at fork_exit+0xcc/frame 0xfffffe0053fb3f30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0053fb3f30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100031 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x2193ec7(%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         0xfffffe00033eee30
rdx         0xdffff7c000000000
rbx         0xffffffff826f9820  .str.28
rsp         0xfffffe0053fb1cf0
rbp         0xfffffe0053fb1d10
rsi                        0x1
rdi                          0
r8                           0
r9                  0xffffffff
r10                          0
r11                        0x2
r12                          0
r13         0xfffffe00542b7740
r14         0xffffffff826f9820  .str.28
r15                          0
rip         0xffffffff815cb14e  kdb_enter+0x6e
rflags                    0x46
kdb_enter+0x6e: movq    $0,0x2193ec7(%rip)
db> show proc
Process 12 (intr) at 0xfffffe00541eb580:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff836e9740
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff836e9740 reapsubtree: 12
 sigparent: 20
 vmspace: 0xffffffff836ea6e0
   (map 0xffffffff836ea6e0)
   (map.pmap 0xffffffff836ea7a0)
   (pmap 0xffffffff836ea810)
 threads: 22
100012                   I                                   [swi6: task queue]
100013                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100031                   Run     CPU 0                       [swi1: netisr 0]
100032                   I                                   [swi1: hpts]
100033                   I                                   [swi1: hpts]
100046                   I                                   [irq24: virtio_pci0]
100047                   I                                   [irq25: virtio_pci0]
100048                   I                                   [irq26: virtio_pci0]
100049                   I                                   [irq27: virtio_pci0]
100050                   I                                   [irq28: virtio_pci1]
100051                   I                                   [irq29: virtio_pci1]
100052                   I                                   [irq30: virtio_pci1]
100053                   I                                   [irq31: virtio_pci1]
100054                   I                                   [irq32: virtio_pci1]
100059                   I                                   [irq33: virtio_pci2]
100060                   I                                   [irq34: virtio_pci2]
100061                   I                                   [irq35: virtio_pci2]
100063                   I                                   [irq1: atkbd0]
100064                   I                                   [irq12: psm0]
100065                   I                                   [swi0: uart uart++]
100069                   I                                   [swi1: pf send]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  925     1   925     0  Ss      select  0xfffffe006ca48bc0  rtsol
  924     1   924     0  Ss      select  0xfffffe006ca48cc0  rtsol
  923     1   923     0  Ss      select  0xfffffe006ca48dc0  rtsol
  920   792   424     0  S       kqread  0xfffffe0058765600  rtsol
  887   777   777     0  R                                   syz-executor.3
  792   784   424     0  S       wait    0xfffffe0057bc6b00  sh
  784   424   424     0  S       wait    0xfffffe006cd775a0  sh
  779   773   779     0  Ss      piperd  0xfffffe0058a67110  syz-executor.0
  777   773   777     0  Ss      nanslp  0xffffffff83740401  syz-executor.3
  776   773   776     0  Ss      piperd  0xfffffe0058a71b60  syz-executor.2
  775   773   775     0  Ss      piperd  0xfffffe0058a676c0  syz-executor.1
  773   771   771     0  S       (threaded)                  syz-execprog
100093                   S       uwait   0xfffffe000798c900  syz-execprog
100115                   S       uwait   0xfffffe006a589d80  syz-execprog
100116                   S       uwait   0xfffffe006a589e80  syz-execprog
100117                   S       uwait   0xfffffe006a58a000  syz-execprog
100118                   S       uwait   0xfffffe006a58a100  syz-execprog
100120                   S       uwait   0xfffffe006a58a200  syz-execprog
100121                   S       kqread  0xfffffe0054078800  syz-execprog
100122                   S       wait    0xfffffe0057bc6040  syz-execprog
100123                   S       wait    0xfffffe0057bc6040  syz-execprog
100124                   S       wait    0xfffffe0057bc6040  syz-execprog
100125                   S       wait    0xfffffe0057bc6040  syz-execprog
100131                   S       uwait   0xfffffe0057a9a980  syz-execprog
  771   769   771     0  Ss      pause   0xfffffe0057bc5630  csh
  769   682   769     0  Ss      select  0xfffffe0057a80a40  sshd
  748     1   748     0  Ss+     ttyin   0xfffffe005767b8b0  getty
  747     1   747     0  Ss+     ttyin   0xfffffe00587f80b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe00587f88b0  getty
  745     1   745     0  Ss+     ttyin   0xfffffe00543430b0  getty
  744     1   744     0  Ss+     ttyin   0xfffffe005768c4b0  getty
  743     1   743     0  Ss+     ttyin   0xfffffe00543438b0  getty
  742     1   742     0  Ss+     ttyin   0xfffffe00543440b0  getty
  741     1   741     0  Ss+     ttyin   0xfffffe00543448b0  getty
  740     1   740     0  Ss+     ttyin   0xfffffe00543460b0  getty
  738     1    18     0  S+      piperd  0xfffffe0058a696c0  logger
  737   736    18     0  S+      nanslp  0xffffffff83740400  sleep
  736     1    18     0  S+      wait    0xfffffe006a5b35c0  sh
  686     1   686     0  Ss      nanslp  0xffffffff83740400  cron
  682     1   682     0  Ss      select  0xfffffe0057a82040  sshd
  495     1   495     0  Ss      select  0xfffffe0057a820c0  syslogd
  424     1   424     0  Ss      wait    0xfffffe006a5b1ae0  devd
  423     1   423    65  Ss      select  0xfffffe0057a82440  dhclient
  338     1   338     0  Ss      select  0xfffffe0057a82240  dhclient
  335     1   335     0  Ss      select  0xfffffe0057a82ac0  dhclient
   17     0     0     0  DL      syncer  0xffffffff8385db20  [syncer]
   16     0     0     0  DL      vlruwt  0xfffffe00571af060  [vnlru]
   15     0     0     0  DL      (threaded)                  [bufdaemon]
100079                   D       psleep  0xffffffff8385c100  [bufdaemon]
100082                   D       -       0xffffffff82c0a140  [bufspacedaemon-0]
100095                   D       sdflush 0xfffffe0007dae8e8  [/ worker]
    9     0     0     0  DL      psleep  0xffffffff838a55c0  [vmdaemon]
    8     0     0     0  DL      (threaded)                  [pagedaemon]
100077                   D       psleep  0xffffffff8388d438  [dom0]
100080                   D       launds  0xffffffff8388d444  [laundry: dom0]
100081                   D       umarcl  0xffffffff81d62300  [uma]
    7     0     0     0  DL      -       0xffffffff834bdc10  [rand_harvestq]
    6     0     0     0  DL      pftm    0xffffffff83fe1ea0  [pf purge]
    5     0     0     0  DL      waiting 0xffffffff845ce5a0  [sctp_iterator]
    4     0     0     0  DL      (threaded)                  [cam]
100044                   D       -       0xffffffff83488340  [doneq0]
100045                   D       -       0xffffffff834882c0  [async]
100076                   D       -       0xffffffff83488140  [scanner]
    3     0     0     0  DL      (threaded)                  [crypto]
100041                   D       crypto_ 0xffffffff83888c60  [crypto]
100042                   D       crypto_ 0xfffffe005407bc30  [crypto returns 0]
100043                   D       crypto_ 0xfffffe005407bc80  [crypto returns 1]
   14     0     0     0  DL      seqstat 0xfffffe00543dcc88  [sequencer 00]
   13     0     0     0  DL      (threaded)                  [geom]
100035                   D       -       0xffffffff836e8d60  [g_event]
100036                   D       -       0xffffffff836e8d80  [g_up]
100037                   D       -       0xffffffff836e8da0  [g_down]
    2     0     0     0  LL      (threaded)                  [clock]
100029                   L      *sctp-tc 0xfffffe000787b900  [clock (0)]
100030                   I                                   [clock (1)]
   12     0     0     0  RL      (threaded)                  [intr]
100012                   I                                   [swi6: task queue]
100013                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100031                   Run     CPU 0                       [swi1: netisr 0]
100032                   I                                   [swi1: hpts]
100033                   I                                   [swi1: hpts]
100046                   I                                   [irq24: virtio_pci0]
100047                   I                                   [irq25: virtio_pci0]
100048                   I                                   [irq26: virtio_pci0]
100049                   I                                   [irq27: virtio_pci0]
100050                   I                                   [irq28: virtio_pci1]
100051                   I                                   [irq29: virtio_pci1]
100052                   I                                   [irq30: virtio_pci1]
100053                   I                                   [irq31: virtio_pci1]
100054                   I                                   [irq32: virtio_pci1]
100059                   I                                   [irq33: virtio_pci2]
100060                   I                                   [irq34: virtio_pci2]
100061                   I                                   [irq35: virtio_pci2]
100063                   I                                   [irq1: atkbd0]
100064                   I                                   [irq12: psm0]
100065                   I                                   [swi0: uart uart++]
100069                   I                                   [swi1: pf send]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   Run     CPU 1                       [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffffe00541ec040  [init]
   10     0     0     0  DL      audit_w 0xffffffff838896c0  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff836e9740  [swapper]
100005                   D       -       0xfffffe0054214000  [softirq_0]
100006                   D       -       0xfffffe0054213e00  [softirq_1]
100007                   D       -       0xfffffe0054213d00  [if_io_tqg_0]
100008                   D       -       0xfffffe0054213c00  [if_io_tqg_1]
100009                   D       -       0xfffffe0054213b00  [if_config_tqg_0]
100010                   D       -       0xfffffe0007970b00  [pci_hp taskq]
100011                   D       -       0xfffffe0007970a00  [kqueue_ctx taskq]
100014                   D       -       0xfffffe0007970700  [thread taskq]
100016                   D       -       0xfffffe0007970500  [aiod_kick taskq]
100017                   D       -       0xfffffe0007970400  [deferred_unmount ta]
100018                   D       -       0xfffffe0007970300  [inm_free taskq]
100019                   D       -       0xfffffe0007970200  [in6m_free taskq]
100020                   D       -       0xfffffe0007970100  [linuxkpi_irq_wq]
100021                   D       -       0xfffffe0007970000  [linuxkpi_short_wq_0]
100022                   D       -       0xfffffe0007970000  [linuxkpi_short_wq_1]
100023                   D       -       0xfffffe0007970000  [linuxkpi_short_wq_2]
100024                   D       -       0xfffffe0007970000  [linuxkpi_short_wq_3]
100025                   D       -       0xfffffe000796fe00  [linuxkpi_long_wq_0]
100026                   D       -       0xfffffe000796fe00  [linuxkpi_long_wq_1]
100027                   D       -       0xfffffe000796fe00  [linuxkpi_long_wq_2]
100028                   D       -       0xfffffe000796fe00  [linuxkpi_long_wq_3]
100034                   D       -       0xfffffe000796fd00  [firmware taskq]
100039                   D       -       0xfffffe000796fa00  [crypto_0]
100040                   D       -       0xfffffe000796fa00  [crypto_1]
100055                   D       -       0xfffffe000796f600  [vtnet0 rxq 0]
100056                   D       -       0xfffffe000796f500  [vtnet0 txq 0]
100057                   D       -       0xfffffe000796f400  [vtnet0 rxq 1]
100058                   D       -       0xfffffe000796f300  [vtnet0 txq 1]
100062                   D       vtbslp  0xfffffe00570bcc80  [virtio_balloon]
100066                   D       -       0xffffffff826fea80  [deadlkres]
100070                   D       -       0xfffffe0007d04200  [acpi_task_0]
100071                   D       -       0xfffffe0007d04200  [acpi_task_1]
100072                   D       -       0xfffffe0007d04200  [acpi_task_2]
100074                   D       -       0xfffffe0007970c00  [mca taskq]
100075                   D       -       0xfffffe000796f900  [CAM taskq]
db> show all locks
Process 887 (syz-executor.3) thread 0xfffffe0057684000 (100087)
exclusive sleep mutex sctp-create (inp_create) r = 0 (0xfffffe006d262d50) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_usrreq.c:6993
Process 12 (intr) thread 0xfffffe00542b7740 (100031)
exclusive sleep mutex sctp-inp (inp) r = 0 (0xfffffe006d260f90) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3338
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe00079e6528) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3337
exclusive sleep mutex sctp-create (inp_create) r = 0 (0xfffffe006d260fb0) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3336
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe006d2ff8b0) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:1470
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
          tcp_hpts            7         4801K            7
            devbuf         4192         4324K         4217
         sysctloid        34817         2052K        34888
             vtbuf           24         1968K           46
              kobj          326         1304K          488
            newblk          722         1205K          796
          vfscache            3         1025K            3
               pcb           48          694K          287
          inodedep          128          560K          151
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          118          230K          993
         vnet_data            2          224K            2
          acpitask            1          224K            1
            acpica         1674          184K        60830
           tidhash            3          141K            3
           pagedep           26          135K           88
              vmem            3          134K            4
            linker          352          130K          386
        tfo_ccache            1          128K            1
          IP reass            1          128K            1
            DEVFS1          109          109K          126
               sem            4          106K            4
        gtaskqueue           18           98K           18
          filedesc           12           89K          179
               bus          985           81K         5155
          mtx_pool            2           72K            2
          syncache            1           68K            1
     NFSD srvcache            3           68K            3
            module          513           65K          513
       ddb_capture            1           64K            1
              temp           35           37K         1846
           kdtrace          185           37K         1060
              umtx          288           36K          288
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          128           32K          138
               msg            4           30K            4
            kbdmux            6           28K            6
        DEVFS_RULE           56           20K           56
            dirrem           75           19K           86
            ifaddr           66           19K           68
               BPF           14           19K           14
         ufs_mount            4           17K            5
              proc            3           17K            3
               LRO           16           17K           16
               tty           16           16K           16
           ithread           97           16K           97
          routetbl          124           16K          395
            bus-sc           34           15K         1687
      eventhandler          161           14K          161
           lltable           43           14K           43
            KTRACE          100           13K          100
             ifnet            7           13K            7
       ether_multi          152           13K          162
              kenv           95           12K           95
              GEOM           61           11K          481
              rman           86           11K          431
         CAM queue            5           11K         1528
         sctp_stro            9            9K           80
         bmsafemap            4            9K          120
         in6_multi           65            9K           65
         sctp_atcl           22            9K          249
               rpc            4            9K            4
           devstat            4            9K            4
              UART           12            9K           12
              ksem            1            8K            1
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
            kqueue           55            8K          932
         sctp_timw           30            8K           30
     audit_evclass          238            8K          300
          freefile           58            8K           67
         taskqueue           63            7K           63
            diradd           49            7K          118
            sglist            6            7K            6
              cred           24            6K          275
           CAM DEV            3            6K          510
            plimit           21            6K          350
         pfs_nodes           20            5K           20
             hhook           15            5K           17
       ufs_dirhash           24            5K           24
               UMA          267            5K          267
          pf_ifnet           10            5K           19
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
             mkdir           28            4K          156
           acpisem           28            4K           28
           session           27            4K           38
         proc-args           83            4K         1994
           pwddesc           51            4K          926
          terminal           11            3K           11
          indirdep           10            3K           10
             clone            9            3K            9
           uidinfo            3            3K            8
            ip6ndp           13            3K           14
        local_apic            1            2K            1
           io_apic            1            2K            1
         newdirblk           16            2K           78
         ipsec-saq            2            2K            2
             selfd           32            2K        11440
            Unitno           31            2K           49
          sctp_ifa           13            2K           14
               tun            7            2K            7
           CAM XPT           22            2K          543
             lockf           15            2K           22
               msi           12            2K           12
          in_multi            6            2K            8
         toponodes            6            2K            6
            select           11            2K           35
         sctp_atky           30            2K          379
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
         sctp_stri            2            1K          103
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K            8
      NFSD session            1            1K            1
        CAM periph            4            1K          271
          sctp_ifn            6            1K           14
             ipsec            3            1K            3
               mld            6            1K            6
            CC Mem            3            1K            7
              igmp            6            1K            6
              pfil            6            1K            6
            isadev            6            1K            6
             mount           16            1K           89
          pci_link           10            1K           10
            crypto            4            1K            4
 encap_export_host           12            1K           12
          procdesc            4            1K           10
              cdev            2            1K            2
            DEVFSP            8            1K           13
       lkpikmalloc            8            1K            9
               osd            8            1K           20
           netlink            2            1K           28
       inpcbpolicy           12            1K          186
    chacha20random            1            1K            1
            biobuf            1            1K            1
         sctp_athm           22            1K          300
          sctp_map           18            1K          160
            vnodes            1            1K            1
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
           CAM SIM            2            1K            2
            feeder            7            1K            7
           tcpfunc            3            1K            3
        loginclass            3            1K            7
            prison            6            1K            6
         cryptodev            2            1K           49
          nexusdev            8            1K            8
            apmdev            1            1K            1
          atkbddev            2            1K            2
            soname            5            1K         3513
          pmchooks            1            1K            1
          CAM path            4            1K         1034
     CAM dev queue            2            1K            2
 CAM I/O Scheduler            1            1K            1
          filecaps            4            1K           78
          sctp_vrf            1            1K            1
          freework            1            1K           84
              vnet            1            1K            1
               pmc            1            1K            1
           entropy            2            1K           41
          acpiintr            1            1K            1
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          p1003.1b            1            1K            1
        sctp_mcore            0            0K            0
        sctp_socko            0            0K            0
         sctp_iter            0            0K           10
         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           10
         sctp_aadr            0            0K            0
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8340    1058       14745       0     254   38494208        0
              mbuf    256    8668     994       21888       0     254    2473472        0
          BUF TRIE    144     192   11624         504       0      62    1701504        0
        malloc-384    384    4148      52        4175       0      30    1612800        0
        malloc-128    128   11557      37       14972       0     126    1484032        0
       malloc-4096   4096     330       2         694       0       2    1359872        0
       UMA Slabs 0    112   10690      32       10690       0     126    1200864        0
         sctp_asoc   2256       9     501          80       0     254    1150560        0
      mbuf_cluster   2048     508       0         508       0     254    1040384        0
         vmem btag     56   15757      50       15757       0     254     885192        0
         FFS inode   1168     520      26         587       0       8     637728        0
           sctp_ep   1176      11     499         117       0     254     599760        0
        RADIX NODE    144    3703     156       29118       0      62     555696        0
          lkpicurr    176       2    3080           2       0      62     542432        0
              pbuf   2624       0     202           0       0       2     530048        0
            socket    960      29     479        1522       0     254     487680        0
      malloc-65536  65536       4       2          66       0       1     393216        0
        sctp_raddr    736      18     499         339       0     254     380512        0
         VM OBJECT    264    1105      65       16451       0      30     308880        0
        256 Bucket   2048     138       6        1001       0       8     294912        0
             VNODE    448     555      75         624       0      30     282240        0
         malloc-64     64    3867     480        5595       0     254     278208        0
            THREAD   1824     133      11         133       0       8     262656        0
      malloc-16384  16384       9       7          91       0       1     262144        0
         malloc-16     16   14416     334       15166       0     254     236000        0
       malloc-4096   4096      51       5         926       0       2     229376        0
            DEVCTL   1024      22     198         147       0       0     225280        0
        malloc-256    256     732      18         815       0      62     192000        0
         UMA Zones    768     239       0         239       0      16     183552        0
         malloc-32     32    5360     310        6032       0     254     181440        0
        malloc-128    128    1178     217       28379       0     126     178560        0
            lkpimm     56       1    3095           1       0     254     173376        0
         MAP ENTRY     96    1228     410       46919       0     126     157248        0
       malloc-2048   2048      18      54        1156       0       8     147456        0
       malloc-1024   1024     141       3        1156       0      16     147456        0
       FFS2 dinode    256     520      50         587       0      62     145920        0
       S VFS Cache    104     998     289        1093       0     126     133848        0
      malloc-65536  65536       0       2         110       0       1     131072        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-65536  65536       1       1           9       0       1     131072        0
        malloc-128    128     918     105        1037       0     126     130944        0
             unpcb    256      14     496        1193       0     254     130560        0
       mbuf_packet    256      18     490         321       0     254     130048        0
     FPU_save_area    832     135       9         221       0      16     119808        0
          ksiginfo    112      45     999         137       0     126     116928        0
      malloc-32768  32768       3       0           3       0       1      98304        0
              PROC   1376      50      16         925       0       8      90816        0
          UMA Kegs    384     226       7         226       0      30      89472        0
        128 Bucket   1024      44      39         248       0      16      84992        0
        malloc-128    128     403     248         833       0     126      83328        0
       malloc-4096   4096      18       2         586       0       2      81920        0
        malloc-256    256     254      61         426       0      62      80640        0
        malloc-256    256     254      61         611       0      62      80640        0
        sctp_readq    152       0     520          34       0     254      79040        0
        sctp_chunk    152      12     508         263       0     254      79040        0
         filedesc0   1072      51      19         926       0       8      75040        0
             g_bio    408       0     180        4599       0      30      73440        0
         malloc-64     64     553     518       15266       0     254      68544        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
      malloc-32768  32768       0       2         120       0       1      65536        0
sctp_stream_msg_out    112      13     527          58       0     254      60480        0
        malloc-384    384     128      22         152       0      30      57600        0
       malloc-4096   4096      11       3          15       0       2      57344        0
         64 Bucket    512      63      41        1103       0      30      53248        0
         malloc-64     64     370     449       12690       0     254      52416        0
         malloc-64     64     503     316        1600       0     254      52416        0
        malloc-128    128      14     389         352       0     126      51584        0
        malloc-256    256      92     103         431       0      62      49920        0
         32 Bucket    256      65     130        1353       0      62      49920        0
           DIRHASH   1024      35      13          35       0      16      49152        0
             NAMEI   1024       0      48       13431       0      16      49152        0
       malloc-8192   8192       6       0           6       0       1      49152        0
       malloc-8192   8192       5       1           7       0       1      49152        0
       malloc-2048   2048      14      10          59       0       8      49152        0
       malloc-1024   1024      14      34         608       0      16      49152        0
          syncache    168       0     264           5       0     254      44352        0
       malloc-8192   8192       5       0           5       0       1      40960        0
            pcpu-8      8    4677     443        4833       0     254      40960        0
           VMSPACE    616      34      32         910       0      16      40656        0
         udp_inpcb    424       6      84         173       0      30      38160        0
         malloc-64     64      11     556          28       0     254      36288        0
         malloc-64     64       8     559           8       0     254      36288        0
         malloc-64     64     155     412         238       0     254      36288        0
         malloc-64     64      25     542         285       0     254      36288        0
        malloc-128    128      42     237         104       0     126      35712        0
        malloc-128    128      76     203         149       0     126      35712        0
        malloc-128    128     172     107         952       0     126      35712        0
     routing nhops    256      26     109          33       0      62      34560        0
           ttyoutq    256      72      63         160       0      62      34560        0
        malloc-384    384      64      26          64       0      30      34560        0
        malloc-384    384      67      23          67       0      30      34560        0
        malloc-256    256      34     101         235       0      62      34560        0
        malloc-256    256      39      96         416       0      62      34560        0
        malloc-256    256      67      68         966       0      62      34560        0
        malloc-256    256      58      77         765       0      62      34560        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-16384  16384       0       2         160       0       1      32768        0
       malloc-8192   8192       4       0           4       0       1      32768        0
       malloc-2048   2048       8       8           8       0       8      32768        0
       malloc-2048   2048       2      14          25       0       8      32768        0
       malloc-2048   2048       8       8           9       0       8      32768        0
       malloc-2048   2048       0      16          50       0       8      32768        0
       malloc-2048   2048       4      12         195       0       8      32768        0
       malloc-1024   1024       2      30          42       0      16      32768        0
       malloc-1024   1024      10      22          17       0      16      32768        0
       malloc-1024   1024       2      30         157       0      16      32768        0
       malloc-1024   1024       9      23           9       0      16      32768        0
        malloc-512    512       0      64         118       0      30      32768        0
        malloc-512    512       3      61          23       0      30      32768        0
        malloc-512    512       2      62          16       0      30      32768        0
        malloc-512    512       4      60         111       0      30      32768        0
        malloc-512    512       4      60          55       0      30      32768        0
        malloc-512    512       9      55           9       0      30      32768        0
           pcpu-64     64     487      25         487       0     254      32768        0
            ttyinq    160     135      65         300       0      62      32000        0
              PGRP    120      27     237          38       0     126      31680        0
        sctp_laddr     48       0     588          12       0     254      28224        0
         16 Bucket    144      46     150         259       0      62      28224        0
          4 Bucket     48       4     584           4       0     254      28224        0
            da_ccb    544       0      49        1272       0      16      26656        0
         TURNSTILE    136     145      44         145       0      62      25704        0
            cpuset    200       7     121           7       0      62      25600        0
             ripcb    392       3      60           6       0      30      24696        0
       malloc-8192   8192       2       1         103       0       1      24576        0
       malloc-4096   4096       2       4           5       0       2      24576        0
    ertt_txseginfo     40       0     606         265       0     254      24240        0
          rl_entry     40      38     568          38       0     254      24240        0
               PWD     40      15     591         166       0     254      24240        0
           rtentry    168      29     115          33       0      62      24192        0
              pipe    728      20      13         340       0      16      24024        0
             Files     80     130     170        7527       0     126      24000        0
          8 Bucket     80      44     256         288       0     126      24000        0
         tcp_inpcb   1312       3      15           7       0       8      23616        0
        malloc-384    384      23      37         250       0      30      23040        0
        malloc-384    384       1      59         344       0      30      23040        0
        malloc-384    384      39      21          42       0      30      23040        0
        SLEEPQUEUE     88     145     111         145       0     126      22528        0
            clpbuf   2624       0       8          22       0       4      20992        0
         hostcache     64       1     314           1       0     254      20160        0
   udp_inpcb ports     32       3     627          40       0     254      20160        0
              ertt     72       3     277           7       0     126      20160        0
         malloc-32     32     115     515         137       0     254      20160        0
         malloc-32     32     113     517         233       0     254      20160        0
         malloc-32     32      64     566         845       0     254      20160        0
         malloc-32     32      85     545        3229       0     254      20160        0
         malloc-32     32      53     577        1250       0     254      20160        0
          2 Bucket     32      51     579         315       0     254      20160        0
             KNOTE    160      29      96         413       0      62      20000        0
 epoch_record pcpu    256       4      60           4       0      62      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-2048   2048       0       8          12       0       8      16384        0
       malloc-1024   1024       1      15           2       0      16      16384        0
       malloc-1024   1024       3      13           3       0      16      16384        0
        malloc-512    512       1      31           2       0      30      16384        0
           SMR CPU     32       7     504           7       0     254      16352        0
              kenv    258      17      43        1071       0      30      15480        0
            mqnode    416       3      33           3       0      30      14976        0
              vmem   1856       1       7           1       0       8      14848        0
        SMR SHARED     24       7     504           7       0     254      12264        0
   tcp_inpcb ports     32       1     377           1       0     254      12096        0
         malloc-32     32       6     372          28       0     254      12096        0
         malloc-32     32     246     132         308       0     254      12096        0
         malloc-16     16      34     716         214       0     254      12000        0
         malloc-16     16     269     481         308       0     254      12000        0
         malloc-16     16      98     652         173       0     254      12000        0
         malloc-16     16     183     567        3118       0     254      12000        0
         malloc-16     16      30     720       27797       0     254      12000        0
         malloc-16     16      42     708        1453       0     254      12000        0
        malloc-384    384      13      17          14       0      30      11520        0
       Mountpoints   2816       2       2           2       0       4      11264        0
       malloc-8192   8192       0       1          26       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-4096   4096       2       0           2       0       2       8192        0
       malloc-4096   4096       1       1           1       0       2       8192        0
      vtnet_tx_hdr     24       0     334        2517       0     254       8016        0
         malloc-16     16       8     492           9       0     254       8000        0
           pcpu-16     16       4     252           4       0     254       4096        0
       UMA Slabs 1    176       9      13           9       0      62       3872        0
        KMAP ENTRY     96      12      27          14       0       0       3744        0
       FFS1 dinode    128       0       0           0       0     126          0        0
           ada_ccb    272       0       0           0       0      30          0        0
             swblk    136       0       0           0       0      62          0        0
          swpctrie    144       0       0           0       0      62          0        0
   cdg_qdiffsample     16       0       0           0       0     254          0        0
   pf state scrubs     40       0       0           0       0     254          0        0
   pf frag entries     40       0       0           0       0     254          0        0
          pf frags    248       0       0           0       0      62          0        0
  pf table entries    160       0       0           0       0     254          0        0
pf table entry counters     64       0       0           0       0     254          0        0
   pf source nodes    152       0       0           0       0     254          0        0
     pf state keys     88       0       0           0       0     126          0        0
         pf states    360       0       0           0       0     254          0        0
           pf tags    104       0       0           0       0     126          0        0
          pf mtags    184       0       0           0       0      62          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   1024       0       0           0       0      16          0        0
      tcp_rack_map    128       0       0           0       0     126          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
               ipq     56       0       0           0       0     254          0        0
   sctp_asconf_ack     48       0       0           0       0     254          0        0
       sctp_asconf     40       0       0           0       0     254          0        0
   tcp_log_id_node    120       0       0           0       0     126          0        0
 tcp_log_id_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
udplite_inpcb ports     32       0       0           0       0     254          0        0
     udplite_inpcb    424       0       0           0       0      30          0        0
       ripcb ports     32       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    272       0       0           0       0      30          0        0
             AIOCB    552       0       0           0       0      16          0        0
               AIO    208       0       0           0       0      62          0        0
        mqnotifier    216       0       0           0       0      62          0        0
            mvdata     64       0       0           0       0     254          0        0
            mqueue    248       0       0           0       0      62          0        0
        TMPFS node    232       0       0           0       0      62          0        0
           NCLNODE    608       0       0           0       0      16          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
       L VFS Cache    320       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
           cryptop    280       0       0           0       0      30          0        0
  linux_dma_object     32       0       0           0       0     254          0        0
  linux_dma_pctrie    144       0       0           0       0      62          0        0
   IOMMU_MAP_ENTRY    104       0       0           0       0     126          0        0
    mbuf_jumbo_16k  16384       0       0           0       0     254          0        0
     mbuf_jumbo_9k   9216       0       0           0       0     254          0        0
      audit_record   1280       0       0           0       0       8          0        0
         domainset     40       0       0           0       0     254          0        0
        MAC labels     40       0       0           0       0     254          0        0
            vnpbuf   2624       0       0           0       0      16          0        0
           nfspbuf   2624       0       0           0       0       4          0        0
            swwbuf   2624       0       0           0       0       2          0        0
            swrbuf   2624       0       0           0       0       4          0        0
          umtx_shm     88       0       0           0       0     126          0        0
           umtx pi     96       0       0           0       0     126          0        0
rangeset pctrie nodes    144       0       0           0       0      62          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-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-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 (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/01/24 18:15 freebsd-src 1f41c1c1a3a9 1e153dc8 console log report syz ci-freebsd-main panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.
2023/07/22 02:18 freebsd-src bc310a95c58a 27cbe77f console log report syz ci-freebsd-main panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.
2023/07/14 11:07 freebsd-src 39248950a014 ee50e71c console log report syz ci-freebsd-main panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.
2022/09/11 14:27 freebsd-src b20ec58669e2 356d8217 console log report syz ci-freebsd-main panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.
2024/01/09 03:23 freebsd-src 59ce044a7856 4c0fd4bb console log report ci-freebsd-main panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.
2023/08/10 12:12 freebsd-src 28d2e3b5dedf c7f6fc5b console log report ci-freebsd-main panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.
2023/07/19 21:21 freebsd-src e38c634b77de 4547cdf9 console log report ci-freebsd-main panic: _mtx_lock_sleep: recursed on non-recursive mutex sctp-tcb @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.
* Struck through repros no longer work on HEAD.