syzbot


Fatal trap 12: page fault in sctp_inpcb_free

Status: auto-closed as invalid on 2021/07/24 00:40
Reported-by: syzbot+8eaac98ef2eb38b3c80a@syzkaller.appspotmail.com
First crash: 1256d, last: 1155d

Sample crash report:
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0x227
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff82ed653a
stack pointer	        = 0x0:0xfffffe0003788840
frame pointer	        = 0x0:0xfffffe00037888b0
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 12 (swi4: clock (0))
trap number		= 12
panic: page fault
cpuid = 0
time = 1619311194
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00037884a0
vpanic() at vpanic+0x1c7/frame 0xfffffe0003788500
panic() at panic+0x43/frame 0xfffffe0003788560
trap_fatal() at trap_fatal+0x4cd/frame 0xfffffe00037885e0
trap_pfault() at trap_pfault+0xd4/frame 0xfffffe0003788650
trap() at trap+0x41d/frame 0xfffffe0003788770
calltrap() at calltrap+0x8/frame 0xfffffe0003788770
--- trap 0xc, rip = 0xffffffff82ed653a, rsp = 0xfffffe0003788840, rbp = 0xfffffe00037888b0 ---
sctp_inpcb_free() at sctp_inpcb_free+0x41a/frame 0xfffffe00037888b0
sctp_free_assoc() at sctp_free_assoc+0x2890/frame 0xfffffe0003788940
sctp_timeout_handler() at sctp_timeout_handler+0x4e0/frame 0xfffffe0003788a00
softclock_call_cc() at softclock_call_cc+0x1f7/frame 0xfffffe0003788ad0
softclock() at softclock+0xb0/frame 0xfffffe0003788b10
ithread_loop() at ithread_loop+0x33f/frame 0xfffffe0003788bb0
fork_exit() at fork_exit+0xb3/frame 0xfffffe0003788bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0003788bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100029 ]
Stopped at      kdb_enter+0x67: movq    $0,0x163b1be(%rip)
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                           0
rax                       0x12
rcx         0xffffffff81135ea0  vprintf+0x140
rdx                        0x1
rbx                          0
rsp         0xfffffe0003788480
rbp         0xfffffe00037884a0
rsi                          0
rdi         0xffffffff81135ed6  vprintf+0x176
r8                           0
r9          0x8080808080808080
r10         0xfffffe0003788370
r11              0x1fffcfff59c
r12         0xffffffff82267ac0  ddb_dbbe
r13                          0
r14         0xffffffff81a659b6
r15         0xffffffff81a659b6
rip         0xffffffff8112cec7  kdb_enter+0x67
rflags                    0x82
kdb_enter+0x67: movq    $0,0x163b1be(%rip)
db> show proc
Process 12 (intr) at 0xfffff80004567a70:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff8271b5b0
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff8271b5b0 reapsubtree: 12
 sigparent: 20
 vmspace: 0xffffffff8271c220
   (map 0xffffffff8271c220)
   (map.pmap 0xffffffff8271c2e0)
   (pmap 0xffffffff8271c340)
 threads: 23
100010                   I                                   [swi5: fast taskq]
100015                   I                                   [swi6: task queue]
100017                   I                                   [swi6: Giant taskq]
100029                   Run     CPU 0                       [swi4: clock (0)]
100030                   I                                   [swi4: clock (1)]
100031                   I                                   [swi1: netisr 0]
100032                   I                                   [swi3: vm]
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                   RunQ                                [swi1: hpts]
100084                   I                                   [swi1: hpts]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
39697   784   784     0  R                                   syz-executor.1
39696   783   783     0  R       (threaded)                  syz-executor.0
133167                   RunQ                                syz-executor.0
140779                   S       uwait   0xfffff8002e52d700  syz-executor.0
39695   826   826     0  RE      CPU 1                       syz-executor.3
32604 32603   806     0  SV      uwait   0xfffff80004962380  syz-executor.2
32603     1   806     0  DV      ppwait  0xfffff80004f3ea20  syz-executor.2
32460 32459   806     0  SV      uwait   0xfffff80004962580  syz-executor.2
32459     1   806     0  DV      ppwait  0xfffff8002e0734e8  syz-executor.2
29828     1   784     0  S       uwait   0xfffff80004ce2980  syz-executor.1
29820     1   784     0  S       uwait   0xfffff800323ec600  syz-executor.1
20027 20026   806     0  SV      uwait   0xfffff80004ce2b80  syz-executor.2
20026     1   806     0  DV      ppwait  0xfffff80032faca20  syz-executor.2
19946     1   783     0  S       uwait   0xfffff800324d6c80  syz-executor.0
19945     1   783     0  S       uwait   0xfffff80032d0ac00  syz-executor.0
19369     1   783     0  S       uwait   0xfffff800323ec300  syz-executor.0
19368     1   783     0  S       uwait   0xfffff80032b56e80  syz-executor.0
11687     1 11687    65  Ss      select  0xfffff8003265b540  dhclient
 9988     1  9988     0  Ss      select  0xfffff8003265b6c0  dhclient
 9985     1  9985     0  Ss      select  0xfffff8003265b940  dhclient
 9943     1  9943    65  Ss      select  0xfffff8003265b840  dhclient
 7337     1  7337     0  Ss      select  0xfffff800045141c0  dhclient
 7334     1  7334     0  Ss      select  0xfffff800045142c0  dhclient
 7315     1  7315    65  Ss      select  0xfffff8003265bac0  dhclient
 2700     1  2700     0  Ss      select  0xfffff8003265bb40  dhclient
 2694     1  2694     0  Ss      select  0xfffff8003265bbc0  dhclient
 2664     1  2664    65  Ss      select  0xfffff8003265bdc0  dhclient
 1370     1   826     0  S       uwait   0xfffff80004fbf100  syz-executor.3
 1367     1   826     0  S       uwait   0xfffff800324d6000  syz-executor.3
 1056     1  1056     0  Ss      select  0xfffff80004bcc440  dhclient
 1053     1  1053     0  Ss      select  0xfffff8003265bd40  dhclient
  826   780   826     0  Ds      proctre 0xffffffff82202900  syz-executor.3
  806   780   806     0  Ds      proctre 0xffffffff82202900  syz-executor.2
  784   780   784     0  Ls     *process 0xfffff80004f26240  syz-executor.1
  783   780   783     0  Ds      proctre 0xffffffff82202900  syz-executor.0
  780   778   778     0  S       (threaded)                  syz-fuzzer
100104                   S       uwait   0xfffff80004fbfb00  syz-fuzzer
100118                   S       uwait   0xfffff800324d6a00  syz-fuzzer
100119                   S       uwait   0xfffff800324d6200  syz-fuzzer
100120                   S       uwait   0xfffff80032b56880  syz-fuzzer
100121                   S       uwait   0xfffff80004ce2680  syz-fuzzer
100122                   S       uwait   0xfffff80032b56980  syz-fuzzer
100123                   S       uwait   0xfffff80004ce2780  syz-fuzzer
100124                   S       kqread  0xfffff80004ba0b00  syz-fuzzer
100125                   S       uwait   0xfffff80004ce2880  syz-fuzzer
  778   776   778     0  Ss      pause   0xfffff800324620b0  csh
  776   694   776     0  Ss      select  0xfffff8003265bf40  sshd
  760     1   760     0  Rs+                                 getty
  759     1   759     0  Ss+     ttyin   0xfffff80004c854b0  getty
  758     1   758     0  Ss+     ttyin   0xfffff80004c85cb0  getty
  757     1   757     0  Ss+     ttyin   0xfffff80004c8a4b0  getty
  756     1   756     0  Ss+     ttyin   0xfffff80004c8acb0  getty
  755     1   755     0  Ss+     ttyin   0xfffff80004c8d4b0  getty
  754     1   754     0  Ss+     ttyin   0xfffff80004c8dcb0  getty
  753     1   753     0  Ss+     ttyin   0xfffff80004c934b0  getty
  752     1   752     0  Ss+     ttyin   0xfffff80004c93cb0  getty
  698     1   698     0  Ss      nanslp  0xffffffff8273b7e0  cron
  694     1   694     0  Ss      select  0xfffff800045148c0  sshd
  507     1   507     0  Ss      select  0xfffff800045145c0  syslogd
  436     1   436     0  Ss      select  0xfffff80004514640  devd
  435     1   435    65  Ss      select  0xfffff80004bcca40  dhclient
  350     1   350     0  Ss      select  0xfffff800045146c0  dhclient
  347     1   347     0  Ss      select  0xfffff80004514940  dhclient
   23     0     0     0  DL      syncer  0xffffffff8282ac50  [syncer]
   22     0     0     0  DL      vlruwt  0xfffff80004e9ca70  [vnlru]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100080                   D       qsleep  0xffffffff82829d00  [bufdaemon]
100087                   D       -       0xffffffff8220ae00  [bufspacedaemon-0]
100097                   D       sdflush 0xfffff80004f5fce8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff82851b08  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100078                   D       psleep  0xffffffff82845f78  [dom0]
100085                   D       launds  0xffffffff82845f84  [laundry: dom0]
100086                   D       umarcl  0xffffffff815be410  [uma]
   18     0     0     0  DL      -       0xffffffff8256fb78  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff82f2f818  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff82d833c0  [pf purge]
   15     0     0     0  DL      -       0xffffffff8282735c  [soaiod4]
    9     0     0     0  DL      -       0xffffffff8282735c  [soaiod3]
    8     0     0     0  DL      -       0xffffffff8282735c  [soaiod2]
    7     0     0     0  DL      -       0xffffffff8282735c  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100043                   D       -       0xffffffff82447040  [doneq0]
100044                   D       -       0xffffffff82446fc0  [async]
100077                   D       -       0xffffffff82446e90  [scanner]
   14     0     0     0  DL      seqstat 0xfffff800046d6488  [sequencer 00]
    5     0     0     0  DL      crypto_ 0xfffff80004628d80  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffff80004628d30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff828434a0  [crypto]
   13     0     0     0  DL      (threaded)                  [geom]
100034                   D       -       0xffffffff8271b020  [g_event]
100035                   D       -       0xffffffff8271b028  [g_up]
100036                   D       -       0xffffffff8271b030  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100027                   D       -       0xfffff80004147800  [thr_0]
100028                   D       -       0xfffff80004147880  [thr_1]
   12     0     0     0  RL      (threaded)                  [intr]
100010                   I                                   [swi5: fast taskq]
100015                   I                                   [swi6: task queue]
100017                   I                                   [swi6: Giant taskq]
100029                   Run     CPU 0                       [swi4: clock (0)]
100030                   I                                   [swi4: clock (1)]
100031                   I                                   [swi1: netisr 0]
100032                   I                                   [swi3: vm]
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                   RunQ                                [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    0xfffff80004518538  [init]
   10     0     0     0  DL      audit_w 0xffffffff828439b0  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff8271b5b0  [swapper]
100005                   D       -       0xfffff8000456ae00  [if_config_tqg_0]
100006                   D       -       0xfffff8000456ad00  [softirq_0]
100007                   D       -       0xfffff8000456ac00  [softirq_1]
100008                   D       -       0xfffff8000456ab00  [if_io_tqg_0]
100009                   D       -       0xfffff8000456aa00  [if_io_tqg_1]
100011                   D       -       0xfffff80004406b00  [in6m_free taskq]
100012                   D       -       0xfffff80004406a00  [kqueue_ctx taskq]
100013                   D       -       0xfffff80004406900  [linuxkpi_irq_wq]
100014                   D       -       0xfffff80004406800  [inm_free taskq]
100016                   D       -       0xfffff80004406600  [aiod_kick taskq]
100018                   D       -       0xfffff80004406400  [thread taskq]
100019                   D       -       0xfffff80004406300  [linuxkpi_short_wq_0]
100020                   D       -       0xfffff80004406300  [linuxkpi_short_wq_1]
100021                   D       -       0xfffff80004406300  [linuxkpi_short_wq_2]
100022                   D       -       0xfffff80004406300  [linuxkpi_short_wq_3]
100023                   D       -       0xfffff80004406200  [linuxkpi_long_wq_0]
100024                   D       -       0xfffff80004406200  [linuxkpi_long_wq_1]
100025                   D       -       0xfffff80004406200  [linuxkpi_long_wq_2]
100026                   D       -       0xfffff80004406200  [linuxkpi_long_wq_3]
100033                   D       -       0xfffff80004406100  [firmware taskq]
100037                   D       -       0xfffff80004627e00  [crypto_0]
100038                   D       -       0xfffff80004627e00  [crypto_1]
100054                   D       -       0xfffff80004627b00  [vtnet0 rxq 0]
100055                   D       -       0xfffff80004627a00  [vtnet0 txq 0]
100056                   D       -       0xfffff80004627900  [vtnet0 rxq 1]
100057                   D       -       0xfffff80004627800  [vtnet0 txq 1]
100059                   D       vtbslp  0xfffff8000475c380  [virtio_balloon]
100063                   D       -       0xfffff80004627600  [mca taskq]
100066                   D       -       0xffffffff81e11830  [deadlkres]
100072                   D       -       0xfffff80004c95e00  [acpi_task_0]
100073                   D       -       0xfffff80004c95e00  [acpi_task_1]
100074                   D       -       0xfffff80004c95e00  [acpi_task_2]
100076                   D       -       0xfffff80004627c00  [CAM taskq]
39693   806   806     0  Z                                   syz-executor.2
db> show all locks
Process 39697 (syz-executor.1) thread 0xfffffe0094c46c00 (120520)
exclusive sleep mutex process lock (process lock) r = 0 (0xfffff8004f44b128) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_trap.c:116
Process 39695 (syz-executor.3) thread 0xfffffe0094c86100 (102709)
exclusive sleep mutex sctp-create (inp_create) r = 0 (0xfffff80059055e88) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3330
Process 784 (syz-executor.1) thread 0xfffffe005577c800 (100092)
exclusive sx proctree (proctree) r = 0 (0xffffffff82202900) locked @ /syzkaller/managers/main/kernel/sys/kern/kern_exit.c:1251
Process 12 (intr) thread 0xfffffe000410ba00 (100029)
exclusive sleep mutex sctp-inp (inp) r = 0 (0xfffff8004feb7968) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3333
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe000419a5d0) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3331
exclusive sleep mutex sctp-create (inp_create) r = 0 (0xfffff8004feb7988) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3330
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4216         4340K         4244
          tcp_hpts            5         3201K            5
             vtbuf           24         1968K           46
         sysctloid        31145         1826K        31212
              kobj          332         1328K          492
               pcb          681         1267K       109133
            newblk            9         1026K        39349
          vfscache            3         1025K            3
          inodedep          916          856K        39036
           pf_rule          686          681K         1282
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
          filedesc           44          345K        77417
           subproc          171          344K        39793
         sctp_stro          306          306K        21874
         sctp_atcl          642          241K        81120
            dirrem          907          227K        38841
            acpica         1674          184K        55406
         vnet_data            1          168K            1
           tidhash            3          141K            3
           pagedep            9          130K        38726
        tfo_ccache            1          128K            1
          freefile          907          114K        38832
            DEVFS1          106          106K          123
               sem            4          106K            4
            linker          287          101K          338
               BPF           46           88K           46
               bus          995           81K         3509
         sctp_timw          322           81K          322
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          507           64K          507
           kdtrace          247           48K        80478
              umtx          378           48K          378
              temp           40           43K         3474
         sctp_atky          947           40K       104816
               shm            3           36K           44
              vmem            3           34K            5
         hostcache            1           32K            1
            DEVFS3          125           32K          135
               msg            4           30K            4
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
            ifaddr           70           20K           72
        DEVFS_RULE           56           20K           56
         ufs_mount            5           17K            6
              proc            3           17K            3
               tty           16           16K           16
           ithread           99           16K           99
            bus-sc           33           14K         1719
           lltable           43           14K          108
            KTRACE          100           13K          100
             ifnet            7           13K            7
       ether_multi          152           13K          162
              kenv           93           12K           93
      eventhandler          133           12K          133
              ksem            7           11K           25
         sctp_athm          642           11K        81236
              rman           84           10K          425
              GEOM           60           10K          489
          sctp_map          612           10K        43748
         in6_multi           65            9K           65
         bmsafemap            2            9K        38951
              UART           12            9K           12
           devstat            4            9K            4
               rpc            2            8K            2
             shmfd            1            8K           25
       pfs_vncache            1            8K            1
         pfs_nodes           20            8K           20
     audit_evclass          236            8K          294
            kqueue           79            8K        39768
            sglist            5            7K            5
           CAM DEV            3            6K          510
            plimit           24            6K          456
              cred           24            6K          304
         taskqueue           57            6K           57
         CAM queue            5            6K         1528
            DEVFSP           78            5K           82
           pwddesc           75            5K        39698
       ufs_dirhash           24            5K           24
          pf_ifnet           11            5K          370
           session           35            5K           52
               UMA          265            5K          265
                vt           11            5K           11
         sctp_stri            8            4K         3576
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
          kcovinfo           64            4K           68
          routetbl           23            4K           23
             lockf           33            4K          119
           acpisem           28            4K           28
             selfd           55            4K       534734
             hhook           13            4K           13
       fpukern_ctx            3            3K            3
         proc-args           52            3K          695
          terminal           11            3K           11
            select           19            3K           83
           uidinfo            3            3K           30
        local_apic            1            2K            1
           io_apic            1            2K            1
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           14
          sctp_ifa           13            2K           14
            Unitno           27            2K           47
           CAM XPT           22            2K          543
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
               msi            9            2K            9
             clone            9            2K            9
               tun            7            2K            7
          freework            5            2K        38717
           softdep            1            1K            1
             mkdir            8            1K        77416
          freeblks            4            1K        38716
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           70
      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
            crypto            4            1K            4
 encap_export_host           12            1K           12
          procdesc            5            1K           18
         newdirblk            4            1K        38708
            diradd            4            1K        38881
              pfil            4            1K            4
           CAM SIM            2            1K            2
              cdev            2            1K            2
       inpcbpolicy           15            1K         2476
    chacha20random            1            1K            1
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            statfs            0            0K        38953
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ag_tgt_map_t malloc            0            0K            0
ag_slr_map_t malloc            0            0K            0
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tiDeviceHandle_t * malloc            0            0K            0
ag_portal_data_t malloc            0            0K            0
ag_device_t malloc            0            0K            0
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     NFSD usrgroup            0            0K            0
db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8352    1317     1760724       0     254   39604224        0
         sctp_asoc   2288     305    3540       21874       0     254    8797360        0
       malloc-2048   2048     330    3454       57984       0       8    7749632        0
           sctp_ep   1280     329    3511       54185       0     254    4915200        0
        malloc-384    384    4844    6896       85325       0      30    4508160        0
       malloc-1024   1024     443    3453       22046       0      16    3989504        0
      mbuf_cluster   2048    1575       1        1575       0     254    3227648        0
              mbuf    256    9090    3360     3100071       0     254    3187200        0
        sctp_raddr    736     347    3899       39408       0     254    3125056        0
        RADIX NODE    144   19993     220      986719       0      62    2910672        0
              pbuf   2624       0     973           0       0       2    2553152        0
        malloc-384    384     915    4635       39035       0      30    2131200        0
          BUF TRIE    144     190   13278        1305       0      62    1939392        0
       UMA Slabs 0    112   14519      22       14519       0     126    1628592        0
        malloc-256    256    1084    4631       40309       0      62    1463040        0
       malloc-4096   4096     354       1        1129       0       2    1454080        0
        malloc-256    256      12    5658       71450       0      62    1451520        0
        malloc-128    128   10193      37       10259       0     126    1309440        0
        malloc-256    256     372    3528       55020       0      62     998400        0
        malloc-128    128    1545    4624      117734       0     126     789632        0
        256 Bucket   2048     352      18       23569       0       8     757760        0
       malloc-1024   1024     690       6        1412       0      16     712704        0
        sctp_laddr     48     512   13600       32209       0     254     677376        0
         FFS inode   1160     524      29       39360       0       8     641480        0
      malloc-16384  16384      24       5       38709       0       1     475136        0
      malloc-65536  65536       7       0           7       0       1     458752        0
         VM OBJECT    264    1503      87      558111       0      30     419760        0
       mbuf_packet    256     189    1386       68245       0     254     403200        0
            lkpimm    160       1    2324           1       0      62     372000        0
          lkpicurr    160       2    2323           2       0      62     372000        0
            THREAD   1792     169      20       40779       0       8     338688        0
       malloc-4096   4096      77       4       39698       0       2     331776        0
             VNODE    448     561      87       39399       0      30     290304        0
         malloc-64     64     718    3692       65645       0     254     282240        0
       tcp_bbr_map    128       0    2170        7619       0     126     277760        0
        sctp_chunk    152     234    1508       24143       0     254     264784        0
      malloc-65536  65536       2       2          10       0       1     262144        0
         malloc-32     32     737    7201      120230       0     254     254016        0
sctp_stream_msg_out    112     150    2082        4969       0     254     249984        0
         malloc-16     16    1292   14208      125101       0     254     248000        0
         MAP ENTRY     96    2225     337     2131671       0     126     245952        0
            socket    944      63     177       58390       0     254     226560        0
            DEVCTL   1024       0     216         131       0       0     221184        0
         malloc-64     64    3284      55        3303       0     254     213696        0
         malloc-16     16   12907     343       13002       0     254     212000        0
         vmem btag     56    3358      86        3358       0     254     192864        0
         UMA Zones    768     237       2         237       0      16     183552        0
        malloc-128    128    1303      61       30339       0     126     174592        0
         64 Bucket    512     293      27       28678       0      30     163840        0
         malloc-32     32    4891     149        4923       0     254     161280        0
           VMSPACE   2544      50      10       39670       0       4     152640        0
        128 Bucket   1024     102      41        4050       0      16     146432        0
       S VFS Cache    104    1037     367       40269       0     126     146016        0
       FFS2 dinode    256     524      46       39358       0      62     145920        0
      malloc-65536  65536       0       2         280       0       1     131072        0
      malloc-65536  65536       0       2          54       0       1     131072        0
      malloc-65536  65536       0       2         136       0       1     131072        0
         32 Bucket    256     447      48       19555       0      62     126720        0
              PROC   1336      76      17       39697       0       8     124248        0
             g_bio    408       0     290        9567       0      30     118320        0
          ksiginfo    112      78     966        2196       0     126     116928        0
        malloc-256    256     293     127       41033       0      62     107520        0
         filedesc0   1072      76      22       39698       0       8     105056        0
        malloc-256    256     368      22        1284       0      62      99840        0
      malloc-32768  32768       1       2           3       0       1      98304        0
            pcpu-8      8   10087     665       20347       0     254      86016        0
          UMA Kegs    384     222       1         222       0      30      85632        0
            clpbuf   2624       0      32          20       0      16      83968        0
      malloc-16384  16384       4       1          10       0       1      81920        0
       malloc-8192   8192       7       3          10       0       1      81920        0
        malloc-128    128     444      83       39528       0     126      67456        0
      malloc-32768  32768       2       0           2       0       1      65536        0
      malloc-32768  32768       0       2         130       0       1      65536        0
       malloc-8192   8192       5       3          33       0       1      65536        0
        malloc-128    128     341     124       39226       0     126      59520        0
         malloc-64     64     552     330       40741       0     254      56448        0
         tcp_inpcb    488       8     104         818       0     254      54656        0
        malloc-256    256      65     145      155519       0      62      53760        0
       malloc-4096   4096      12       1          23       0       2      53248        0
       malloc-8192   8192       1       5          89       0       1      49152        0
       malloc-4096   4096      10       2          13       0       2      49152        0
         malloc-64     64     640     116       19728       0     254      48384        0
             tcpcb   1048       8      36         818       0     254      46112        0
         16 Bucket    144     261      47        1753       0      62      44352        0
          8 Bucket     80     473      77        9777       0     126      44000        0
       malloc-4096   4096       4       6       41226       0       2      40960        0
        malloc-512    512      10      70        3578       0      30      40960        0
         malloc-64     64     136     494      574745       0     254      40320        0
        malloc-384    384      94       6          95       0      30      38400        0
              pipe    744      25      25        1220       0      16      37200        0
           DIRHASH   1024      34       2          34       0      16      36864        0
             NAMEI   1024       0      36      173207       0      16      36864        0
       malloc-2048   2048       9       9         268       0       8      36864        0
        malloc-512    512       3      69         511       0      30      36864        0
             Files     80     258     192      109960       0     126      36000        0
        malloc-128    128       8     271         262       0     126      35712        0
      malloc-16384  16384       0       2         170       0       1      32768        0
           pcpu-64     64     478      34         478       0     254      32768        0
     udplite_inpcb    488       0      64         995       0     254      31232        0
        malloc-256    256      43      77         523       0      62      30720        0
         TURNSTILE    136     190      20         190       0      62      28560        0
             KNOTE    160      28     147      489716       0      62      28000        0
        sctp_readq    152       2     180         667       0     254      27664        0
        malloc-384    384      43      27         113       0      30      26880        0
       malloc-8192   8192       1       2         229       0       1      24576        0
       malloc-8192   8192       1       2         102       0       1      24576        0
       malloc-8192   8192       3       0           3       0       1      24576        0
       malloc-2048   2048      10       2         255       0       8      24576        0
               PWD     32      26     730       38780       0     254      24192        0
         malloc-64     64      93     285         392       0     254      24192        0
            ttyinq    160     135      15         300       0      62      24000        0
        malloc-128    128     166      20        3880       0     126      23808        0
      tcp_rack_pcb    704       1      32         314       0      16      23232        0
           ttyoutq    256      72      18         160       0      62      23040        0
       malloc-2048   2048       7       3         553       0       8      20480        0
       malloc-2048   2048       7       3          23       0       8      20480        0
       malloc-1024   1024       5      15          45       0      16      20480        0
      vtnet_tx_hdr     24       0     835      924033       0     254      20040        0
       Mountpoints   2752       2       5           2       0       4      19264        0
             unpcb    256      20      55        1650       0     254      19200        0
        SLEEPQUEUE     88     190       2         190       0     126      16896        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-4096   4096       2       2           6       0       2      16384        0
       malloc-1024   1024       9       7        1750       0      16      16384        0
         malloc-32     32     321     183        2364       0     254      16128        0
             ripcb    488       5      27         345       0     254      15616        0
       tcp_bbr_pcb    832       0      18         144       0      16      14976        0
       malloc-1024   1024       5       7          39       0      16      12288        0
       malloc-1024   1024       7       5           7       0      16      12288        0
        malloc-512    512       1      23         119       0      30      12288        0
        malloc-512    512      14      10         141       0      30      12288        0
          4 Bucket     48       6     246         801       0     254      12096        0
          2 Bucket     32      62     316        4047       0     254      12096        0
         udp_inpcb    488       2      22         318       0     254      11712        0
              kenv    258      15      30        1065       0      30      11610        0
        malloc-384    384      12      18          12       0      30      11520        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-4096   4096       1       1           3       0       2       8192        0
       malloc-2048   2048       1       3          13       0       8       8192        0
       malloc-2048   2048       0       4          40       0       8       8192        0
        malloc-512    512       1      15           5       0      30       8192        0
        malloc-512    512       0      16          10       0      30       8192        0
        malloc-512    512       8       8           9       0      30       8192        0
           pf tags    104      14      64          90       0     126       8112        0
           rtentry    176      30      16          34       0      62       8096        0
              PGRP     88      35      57          70       0     126       8096        0
          rl_entry     40      68     134          68       0     254       8080        0
             udpcb     32       2     250        1313       0     254       8064        0
         malloc-64     64      10     116          10       0     254       8064        0
         malloc-64     64       9     117         440       0     254       8064        0
         malloc-32     32      79     173          89       0     254       8064        0
         malloc-32     32       7     245       29111       0     254       8064        0
         malloc-32     32      84     168        1024       0     254       8064        0
         malloc-32     32      35     217        3650       0     254       8064        0
         malloc-32     32      30     222         335       0     254       8064        0
         malloc-16     16     316     184         540       0     254       8000        0
         malloc-16     16       2     498       36880       0     254       8000        0
         malloc-16     16     194     306        1450       0     254       8000        0
         malloc-16     16      24     476       46788       0     254       8000        0
         malloc-16     16      21     479          21       0     254       8000        0
        malloc-128    128       8      54          10       0     126       7936        0
      tcp_rack_map    120       2      64         448       0     126       7920        0
            itimer    352       0      22           2       0      30       7744        0
     routing nhops    256      27       3          34       0      62       7680        0
        malloc-384    384       1      19           2       0      30       7680        0
        malloc-384    384       1      19          70       0      30       7680        0
        malloc-384    384       0      20         346       0      30       7680        0
        malloc-256    256       8      22        9099       0      62       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           2       0       2       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           4       0     254       4032        0
         malloc-16     16      10     240          10       0     254       4000        0
       UMA Slabs 1    176      20       2          20       0      62       3872        0
            mqnode    416       3       6           3       0      30       3744        0
        KMAP ENTRY     96      12      27          12       0       0       3744        0
              vmem   1856       1       1           1       0       8       3712        0
           SMR CPU     32       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
   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 mtags     48       0       0           0       0     254          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
      tcp_log_node    120       0       0           0       0     126          0        0
    tcp_log_bucket    176       0       0           0       0      62          0        0
           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
            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
        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
           NCLNODE    584       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     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-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-2048   2048       0       0           0       0       8          0        0
       malloc-1024   1024       0       0           0       0      16          0        0
       malloc-1024   1024       0       0           0       0      16          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 (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/04/25 00:40 freebsd-src 77651151f3ca 17f0b706 console log report ci-freebsd-main Fatal trap 12: page fault in sctp_inpcb_free
2021/04/03 06:00 freebsd-src a04906f0273f 6a81331a console log report ci-freebsd-main Fatal trap 12: page fault in sctp_inpcb_free
2021/01/17 22:04 freebsd-src b7ab6832cd98 813be542 console log report ci-freebsd-i386 Fatal trap 12: page fault in sctp_inpcb_free
2021/01/14 07:27 freebsd-src 818390ce0ca5 269d24e8 console log report ci-freebsd-main
* Struck through repros no longer work on HEAD.