syzbot


Fatal trap NUM: page fault in sctp_ss_fb_select

Status: fixed on 2021/09/29 10:05
Reported-by: syzbot+0aa0d676429ebcd53299@syzkaller.appspotmail.com
Fix commit: 5b53e749a95e sctp: fix usage of stream scheduler functions
First crash: 942d, last: 939d

Sample crash report:
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0xffffffffffffffff
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff84888655
stack pointer	        = 0x28:0xfffffe009bfb4f00
frame pointer	        = 0x28:0xfffffe009bfb4f30
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		= 982 (syz-executor.2)
trap number		= 12
panic: page fault
cpuid = 0
time = 1632802414
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe009bfb4710
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe009bfb4870
vpanic() at vpanic+0x2c5/frame 0xfffffe009bfb4950
panic() at panic+0xb5/frame 0xfffffe009bfb4a10
trap_fatal() at trap_fatal+0x6a4/frame 0xfffffe009bfb4b10
trap_pfault() at trap_pfault+0x186/frame 0xfffffe009bfb4c50
trap() at trap+0x5e7/frame 0xfffffe009bfb4e30
calltrap() at calltrap+0x8/frame 0xfffffe009bfb4e30
--- trap 0xc, rip = 0xffffffff84888655, rsp = 0xfffffe009bfb4f00, rbp = 0xfffffe009bfb4f30 ---
sctp_ss_fb_select() at sctp_ss_fb_select+0x135/frame 0xfffffe009bfb4f30
sctp_med_chunk_output() at sctp_med_chunk_output+0x190c/frame 0xfffffe009bfb5ae0
sctp_chunk_output() at sctp_chunk_output+0x2b25/frame 0xfffffe009bfb6740
sctp_inpcb_free() at sctp_inpcb_free+0xbcc/frame 0xfffffe009bfb67d0
sctp_close() at sctp_close+0x1fb/frame 0xfffffe009bfb68b0
soclose() at soclose+0x3fe/frame 0xfffffe009bfb69c0
_fdrop() at _fdrop+0x58/frame 0xfffffe009bfb69f0
closef() at closef+0x686/frame 0xfffffe009bfb6bd0
closefp_impl() at closefp_impl+0xd9/frame 0xfffffe009bfb6c10
kern_dup() at kern_dup+0xb6d/frame 0xfffffe009bfb6d30
amd64_syscall() at amd64_syscall+0x425/frame 0xfffffe009bfb6f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe009bfb6f30
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x289e4a, rsp = 0x7fffdfffdf08, rbp = 0x7fffdfffdf70 ---
KDB: enter: panic
[ thread pid 982 tid 100297 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x28e0c6a(%rip)
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         0x3c9138315a86f593
rdx                    0x3ffff
rbx                          0
rsp         0xfffffe009bfb4850
rbp         0xfffffe009bfb4870
rsi                    0x40001
rdi         0xffffffff817bc0da  vprintf+0x35a
r8                           0
r9          0xfffffe009bfb4388
r10                          0
r11         0xfffffe00a5201350
r12         0xfffffe00a5200e40
r13         0xfffffe009bfb4801
r14         0xffffffff82c7ec60  .str.18
r15         0xffffffff82c7ec60  .str.18
rip         0xffffffff817afa4b  kdb_enter+0x6b
rflags                    0x46
kdb_enter+0x6b: movq    $0,0x28e0c6a(%rip)
db> show proc
Process 982 (syz-executor.2) at 0xfffffe00a523ea70:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 784 at 0xfffffe009ea17a70
 ABI: FreeBSD ELF64
 flag: 0x10000080  flag2: 0
 arguments: /root/syz-executor.2
 reaper: 0xfffffe0053d60538 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe009eab79f0
   (map 0xfffffe009eab79f0)
   (map.pmap 0xfffffe009eab7ab0)
   (pmap 0xfffffe009eab7b10)
 threads: 2
100271                   RunQ                                syz-executor.2
100297                   Run     CPU 0                       syz-executor.2
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  982   784   784     0  R       (threaded)                  syz-executor.2
100271                   RunQ                                syz-executor.2
100297                   Run     CPU 0                       syz-executor.2
  977   782   782     0  R       (threaded)                  syz-executor.0
100277                   Run     CPU 1                       syz-executor.0
100286                   S       sbwait  0xfffffe009eaf1204  syz-executor.0
100287                   S       sbwait  0xfffffe009eae5984  syz-executor.0
100288                   S       sbwait  0xfffffe00a5244984  syz-executor.0
100289                   S       sbwait  0xfffffe009eaf95c4  syz-executor.0
100290                   S       sbwait  0xfffffe009eaf1d44  syz-executor.0
100300                   S       select  0xfffffe009e581dc0  syz-executor.0
  880     1   880     0  Ss      select  0xfffffe009ea8a8c0  rtsol
  879     1   879     0  Ss      select  0xfffffe009ea8a840  rtsol
  878     1   878     0  Ss      select  0xfffffe009eaa4ec0  rtsol
  875   800   436     0  S       kqread  0xfffffe009e49c100  rtsol
  800   789   436     0  S       wait    0xfffffe00588dda70  sh
  789   436   436     0  S       wait    0xfffffe009ea42538  sh
  786   780   786     0  Ss      piperd  0xfffffe009ea16000  syz-executor.3
  784   780   784     0  Rs                                  syz-executor.2
  783   780   783     0  Ss      piperd  0xfffffe009e57c2e8  syz-executor.1
  782   780   782     0  Rs                                  syz-executor.0
  780   778   778     0  S       (threaded)                  syz-fuzzer
100118                   S       uwait   0xfffffe009e533b00  syz-fuzzer
100119                   S       uwait   0xfffffe00575e3100  syz-fuzzer
100120                   S       uwait   0xfffffe00575e3200  syz-fuzzer
100121                   S       uwait   0xfffffe00575e3300  syz-fuzzer
100122                   S       uwait   0xfffffe009e533c00  syz-fuzzer
100123                   S       uwait   0xfffffe00575e3400  syz-fuzzer
100124                   S       uwait   0xfffffe009e533d00  syz-fuzzer
100125                   S       uwait   0xfffffe009e533e00  syz-fuzzer
100126                   S       kqread  0xfffffe005888d500  syz-fuzzer
  778   776   778     0  Ss      pause   0xfffffe0058968b20  csh
  776   694   776     0  Ss      select  0xfffffe009e581e40  sshd
  760     1   760     0  Rs+                                 getty
  759     1   759     0  Ss+     ttyin   0xfffffe00575f94b0  getty
  758     1   758     0  Ss+     ttyin   0xfffffe00575f9cb0  getty
  757     1   757     0  Ss+     ttyin   0xfffffe00575f64b0  getty
  756     1   756     0  Ss+     ttyin   0xfffffe00575f6cb0  getty
  755     1   755     0  Ss+     ttyin   0xfffffe00575f24b0  getty
  754     1   754     0  Ss+     ttyin   0xfffffe00575f2cb0  getty
  753     1   753     0  Ss+     ttyin   0xfffffe00575ed4b0  getty
  752     1   752     0  Ss+     ttyin   0xfffffe00575edcb0  getty
  698     1   698     0  Ss      nanslp  0xffffffff8405d5c1  cron
  694     1   694     0  Ss      select  0xfffffe0058b142c0  sshd
  507     1   507     0  Ds      bo_wwai 0xfffffe009e47a328  syslogd
  436     1   436     0  Ss      wait    0xfffffe0058b7ca70  devd
  435     1   435    65  Ss      select  0xfffffe0058b14840  dhclient
  350     1   350     0  Ss      select  0xfffffe0058b148c0  dhclient
  347     1   347     0  Ss      select  0xfffffe0057421740  dhclient
   23     0     0     0  DL      syncer  0xffffffff84185960  [syncer]
   22     0     0     0  DL      vlruwt  0xfffffe005877da70  [vnlru]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100085                   D       qsleep  0xffffffff84183660  [bufdaemon]
100088                   D       -       0xffffffff83411f80  [bufspacedaemon-0]
100101                   D       sdflush 0xfffffe005700b0e8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff841bbb80  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100083                   D       psleep  0xffffffff841af6b8  [dom0]
100089                   D       launds  0xffffffff841af6c4  [laundry: dom0]
100090                   D       umarcl  0xffffffff81eb25d0  [uma]
   18     0     0     0  DL      -       0xffffffff83e13ca0  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff849145a0  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff84ade1a0  [pf purge]
   15     0     0     0  DL      -       0xffffffff8417e880  [soaiod4]
    9     0     0     0  DL      -       0xffffffff8417e880  [soaiod3]
    8     0     0     0  DL      -       0xffffffff8417e880  [soaiod2]
    7     0     0     0  DL      -       0xffffffff8417e880  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100048                   D       -       0xffffffff83c99540  [doneq0]
100049                   D       -       0xffffffff83c994c0  [async]
100082                   D       -       0xffffffff83c99340  [scanner]
   14     0     0     0  DL      seqstat 0xfffffe0056ac8c88  [sequencer 00]
    5     0     0     0  DL      crypto_ 0xfffffe00541c9d80  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffffe00541c9d30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff841a9760  [crypto]
   13     0     0     0  DL      (threaded)                  [geom]
100039                   D       -       0xffffffff84030b80  [g_event]
100040                   D       -       0xffffffff84030bc0  [g_up]
100041                   D       -       0xffffffff84030c00  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100029                   D       -       0xfffffe00081f6d00  [thr_0]
100030                   D       -       0xfffffe00081f6d80  [thr_1]
100031                   D       -       0xffffffff8417fc08  [alloc_0]
   12     0     0     0  WL      (threaded)                  [intr]
100011                   I                                   [swi6: task queue]
100012                   I                                   [swi6: Giant taskq]
100014                   I                                   [swi5: fast taskq]
100032                   I                                   [swi1: netisr 0]
100033                   I                                   [swi3: vm]
100034                   I                                   [swi4: clock (0)]
100035                   I                                   [swi4: clock (1)]
100036                   I                                   [swi1: hpts]
100037                   I                                   [swi1: hpts]
100050                   I                                   [irq24: virtio_pci0]
100051                   I                                   [irq25: virtio_pci0]
100052                   I                                   [irq26: virtio_pci0]
100053                   I                                   [irq27: virtio_pci0]
100054                   I                                   [irq28: virtio_pci1]
100055                   I                                   [irq29: virtio_pci1]
100056                   I                                   [irq30: virtio_pci1]
100057                   I                                   [irq31: virtio_pci1]
100058                   I                                   [irq32: virtio_pci1]
100063                   I                                   [irq10: virtio_pci2]
100065                   I                                   [irq1: atkbd0]
100066                   I                                   [irq12: psm0]
100067                   I                                   [swi0: uart uart++]
100075                   I                                   [swi1: pf send]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffffe0053d60538  [init]
   10     0     0     0  DL      audit_w 0xffffffff841aa700  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff84031a80  [swapper]
100005                   D       -       0xfffffe00081f8900  [softirq_0]
100006                   D       -       0xfffffe00081f8700  [softirq_1]
100007                   D       -       0xfffffe00081f8500  [if_io_tqg_0]
100008                   D       -       0xfffffe00081f8300  [if_io_tqg_1]
100009                   D       -       0xfffffe00081f8100  [if_config_tqg_0]
100010                   D       -       0xfffffe0053dfce00  [deferred_unmount ta]
100013                   D       -       0xfffffe0053dfc800  [thread taskq]
100015                   D       -       0xfffffe0053dfc400  [linuxkpi_irq_wq]
100016                   D       -       0xfffffe0053dfc200  [kqueue_ctx taskq]
100017                   D       -       0xfffffe0053dfc000  [pci_hp taskq]
100018                   D       -       0xfffffe0053e06d00  [aiod_kick taskq]
100019                   D       -       0xfffffe0053e06b00  [inm_free taskq]
100020                   D       -       0xfffffe0053e06900  [in6m_free taskq]
100021                   D       -       0xfffffe0053e06700  [linuxkpi_short_wq_0]
100022                   D       -       0xfffffe0053e06700  [linuxkpi_short_wq_1]
100023                   D       -       0xfffffe0053e06700  [linuxkpi_short_wq_2]
100024                   D       -       0xfffffe0053e06700  [linuxkpi_short_wq_3]
100025                   D       -       0xfffffe0053e06200  [linuxkpi_long_wq_0]
100026                   D       -       0xfffffe0053e06200  [linuxkpi_long_wq_1]
100027                   D       -       0xfffffe0053e06200  [linuxkpi_long_wq_2]
100028                   D       -       0xfffffe0053e06200  [linuxkpi_long_wq_3]
100038                   D       -       0xfffffe0053e14200  [firmware taskq]
100042                   D       -       0xfffffe005419ec00  [crypto_0]
100043                   D       -       0xfffffe005419ec00  [crypto_1]
100059                   D       -       0xfffffe0056ec3b00  [vtnet0 rxq 0]
100060                   D       -       0xfffffe0056ec3a00  [vtnet0 txq 0]
100061                   D       -       0xfffffe0056ec3900  [vtnet0 rxq 1]
100062                   D       -       0xfffffe0056ec3800  [vtnet0 txq 1]
100064                   D       vtbslp  0xfffffe0056ff6600  [virtio_balloon]
100068                   D       -       0xfffffe0057027800  [mca taskq]
100073                   D       -       0xffffffff82c85be1  [deadlkres]
100077                   D       -       0xfffffe0057415a00  [acpi_task_0]
100078                   D       -       0xfffffe0057415a00  [acpi_task_1]
100079                   D       -       0xfffffe0057415a00  [acpi_task_2]
100081                   D       -       0xfffffe005419e400  [CAM taskq]
db> show all locks
Process 982 (syz-executor.2) thread 0xfffffe00a5200e40 (100297)
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe009eaf5380) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3355
exclusive sleep mutex sctp-inp (inp) r = 0 (0xfffffe009eab1e50) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3322
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe00081b7f50) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3321
exclusive sleep mutex sctp-create (inp_create) r = 0 (0xfffffe009eab1e70) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:3320
Process 977 (syz-executor.0) thread 0xfffffe00a5204020 (100277)
exclusive sleep mutex umtxql (umtxql) r = 0 (0xffffffff8407ed00) locked @ /syzkaller/managers/main/kernel/sys/kern/kern_umtx.c:1247
Process 977 (syz-executor.0) thread 0xfffffe009ea35000 (100286)
exclusive sx so_rcv_sx (so_rcv_sx) r = 0 (0xfffffe009eaf1180) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_socket.c:4157
Process 977 (syz-executor.0) thread 0xfffffe00a52031e0 (100288)
exclusive sx so_rcv_sx (so_rcv_sx) r = 0 (0xfffffe00a5244900) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_socket.c:4157
Process 977 (syz-executor.0) thread 0xfffffe00a5201c80 (100289)
exclusive sx so_rcv_sx (so_rcv_sx) r = 0 (0xfffffe009eaf9540) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_socket.c:4157
Process 507 (syslogd) thread 0xfffffe0058b521e0 (100107)
exclusive lockmgr ufs (ufs) r = 0 (0xfffffe009e47a230) locked @ /syzkaller/managers/main/kernel/sys/kern/vfs_syscalls.c:3543
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4213         4323K         4241
          tcp_hpts            6         3201K            6
         sysctloid        35175         2072K        35246
             vtbuf           24         1968K           46
              kobj          326         1304K          483
            newblk          669         1191K          851
          vfscache            3         1025K            3
               pcb           34          544K          424
          inodedep           62          535K          200
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          128          248K         1058
            acpica         1674          184K        55237
         vnet_data            1          168K            1
              vmem            3          146K            4
           tidhash            3          141K            3
            linker          355          140K          383
           pagedep           15          132K          138
        tfo_ccache            1          128K            1
            DEVFS1          108          108K          125
               sem            4          106K            4
          filedesc           14          105K          281
               bus          986           80K         3474
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          509           64K          509
           kdtrace          208           42K         1286
              umtx          330           42K          330
              temp           35           35K         1929
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          127           32K          137
               msg            4           30K            4
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
        DEVFS_RULE           56           20K           56
            ifaddr           67           19K           69
          routetbl          140           19K          443
               BPF           14           19K           18
         ufs_mount            4           17K            5
              proc            3           17K            3
               tty           16           16K           16
           ithread           99           16K           99
            bus-sc           34           15K         1691
           lltable           44           14K           44
       ether_multi          157           13K          167
            KTRACE          100           13K          100
             ifnet            7           13K            7
              kenv           95           12K           95
      eventhandler          133           12K          133
         CAM queue            5           11K         1528
            dirrem           40           10K          136
              GEOM           61           10K          487
              rman           84           10K          425
         in6_multi           71            9K           71
         bmsafemap            2            9K          169
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K            6
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
            kqueue           59            8K          991
         pfs_nodes           20            8K           20
     audit_evclass          237            8K          295
         taskqueue           63            7K           63
            sglist            5            7K            5
           CAM DEV            3            6K          510
              cred           23            6K          196
          freefile           40            5K          134
            plimit           20            5K          334
          pf_ifnet           13            5K           23
       ufs_dirhash           24            5K           24
            DEVFSP           72            5K           98
               UMA          270            5K          270
         sctp_timw           17            5K           17
                vt           11            5K           11
          pf_table            2            4K            6
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
          kcovinfo           64            4K           68
           acpisem           28            4K           28
           pwddesc           55            4K          985
             hhook           15            4K           17
           session           26            4K           36
          terminal           11            3K           11
         proc-args           46            3K          556
           uidinfo            3            3K            7
            diradd           17            3K          167
         sctp_stro            2            2K           29
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
             mkdir           16            2K          256
         ipsec-saq            2            2K            2
         sctp_atcl            5            2K          187
            ip6ndp           12            2K           15
          sctp_ifa           14            2K           15
            Unitno           31            2K           47
             selfd           27            2K        17540
            select           13            2K           34
           CAM XPT           22            2K          543
             lockf           15            2K           22
         newdirblk           12            2K          128
          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          134
           softdep            1            1K            1
          freeblks            4            1K          133
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           14
      NFSD session            1            1K            1
        CAM periph            4            1K          271
          sctp_ifn            6            1K           15
             ipsec            3            1K            3
               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
       inpcbpolicy           19            1K          211
          indirdep            2            1K           10
              pfil            4            1K            4
          procdesc            4            1K           10
              cdev            2            1K            2
               osd            8            1K           44
    chacha20random            1            1K            1
         sctp_atky            7            1K          256
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            vnodes            1            1K            1
           CAM SIM            2            1K            2
              ktls            1            1K            1
            feeder            7            1K            7
           tcpfunc            3            1K            3
        loginclass            3            1K            6
            prison            6            1K            6
       lkpikmalloc            5            1K            6
               iov            3            1K        14196
        aesni_data            2            1K            2
           pf_rule            1            1K            8
          nexusdev            8            1K            8
            apmdev            1            1K            1
          atkbddev            2            1K            2
     CAM dev queue            2            1K            2
             xform            2            1K           58
 CAM I/O Scheduler            1            1K            1
          CAM path            4            1K         1034
          pmchooks            1            1K            1
            soname            4            1K         3607
         sctp_athm            5            1K          187
          sctp_vrf            1            1K            1
          sctp_map            4            1K           58
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8320     977      326130       0     254   38080512        0
              pbuf   2624       0     989           0       0       2    2595136        0
              mbuf    256    8640     930      552507       0     254    2449920        0
          BUF TRIE    144     195   11565         573       0      62    1693440        0
        malloc-384    384    4230      50        4369       0      30    1643520        0
       malloc-4096   4096     383       7        1485       0       2    1597440        0
        malloc-128    128   11832      41       11909       0     126    1519744        0
       UMA Slabs 0    112   10200      21       10200       0     126    1144752        0
        RADIX NODE    144    7663     228       38418       0      62    1136304        0
         vmem btag     56   16075     100       16075       0     254     905800        0
         FFS inode   1160     503      29         637       0       8     617120        0
       tcp_bbr_map    128       0    4247       22862       0     126     543616        0
    ertt_txseginfo     40       0   12221       66208       0     254     488840        0
      malloc-65536  65536       6       0           6       0       1     393216        0
            lkpimm    168       1    2327           1       0      62     391104        0
          lkpicurr    168       2    2326           2       0      62     391104        0
        256 Bucket   2048     170       4       13179       0       8     356352        0
         VM OBJECT    264    1114      86       15701       0      30     316800        0
            THREAD   1808     152      13         300       0       8     298320        0
         malloc-64     64    4473     126        6535       0     254     294336        0
        malloc-256    256    1040      55        2289       0      62     280320        0
             VNODE    448     540      63         676       0      30     270144        0
         malloc-16     16   14753     497       16089       0     254     244000        0
            DEVCTL   1024      23     197         151       0       0     225280        0
      malloc-65536  65536       1       2          67       0       1     196608        0
      malloc-65536  65536       1       2         137       0       1     196608        0
      mbuf_cluster   2048      90       2          90       0     254     188416        0
         UMA Zones    768     242       2         242       0      16     187392        0
         malloc-32     32    5598     198        6381       0     254     185472        0
      malloc-16384  16384       6       5         138       0       1     180224        0
        malloc-128    128    1217      54       26037       0     126     162688        0
         MAP ENTRY     96    1314     366       49108       0     126     161280        0
     FPU_save_area    832     154      17        2710       0      16     142272        0
       malloc-1024   1024     133       3         150       0      16     139264        0
        malloc-128    128    1064      21        5336       0     126     138880        0
       FFS2 dinode    256     503      22         637       0      62     134400        0
      malloc-65536  65536       0       2           8       0       1     131072        0
       S VFS Cache    104    1002     168        1146       0     126     121680        0
          ksiginfo    112      54     990        2471       0     126     116928        0
           VMSPACE   2544      32      13         963       0       4     114480        0
      malloc-32768  32768       1       2         131       0       1      98304        0
              PROC   1336      54      18         984       0       8      96192        0
          UMA Kegs    384     227       6         227       0      30      89472        0
        128 Bucket   1024      76      11         969       0      16      89088        0
         filedesc0   1072      55      22         985       0       8      82544        0
       malloc-8192   8192       9       1         110       0       1      81920        0
       malloc-8192   8192       8       2          10       0       1      81920        0
             g_bio    408       4     186        5058       0      30      77520        0
      malloc-65536  65536       1       0           1       0       1      65536        0
       malloc-4096   4096      14       1          27       0       2      61440        0
            socket    960      42      18        1604       0     254      57600        0
       malloc-8192   8192       4       3          32       0       1      57344        0
       malloc-2048   2048      14      14         589       0       8      57344        0
       malloc-2048   2048      11      17         166       0       8      57344        0
      malloc-16384  16384       3       0           3       0       1      49152        0
      malloc-16384  16384       2       1          17       0       1      49152        0
      malloc-16384  16384       1       2         161       0       1      49152        0
       malloc-2048   2048       2      22         575       0       8      49152        0
         32 Bucket    256      50     130        3669       0      62      46080        0
       malloc-1024   1024      10      34        1587       0      16      45056        0
         64 Bucket    512      66      22        2286       0      30      45056        0
         malloc-64     64     517     176        1629       0     254      44352        0
        malloc-256    256      93      72         478       0      62      42240        0
            clpbuf   2624       0      16          24       0      16      41984        0
           DIRHASH   1024      34       6          34       0      16      40960        0
            pcpu-8      8    4705     415        4979       0     254      40960        0
        malloc-128    128      61     249         323       0     126      39680        0
            da_ccb    544       1      69        1389       0      16      38080        0
             NAMEI   1024       0      36       13693       0      16      36864        0
       malloc-4096   4096       8       1          10       0       2      36864        0
        malloc-384    384      80      10         137       0      30      34560        0
        malloc-256    256      46      89         185       0      62      34560        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
           pcpu-64     64     487      25         487       0     254      32768        0
         malloc-64     64      98     406        1571       0     254      32256        0
              pipe    744      19      21         335       0      16      29760        0
       malloc-4096   4096       4       3           7       0       2      28672        0
           sctp_ep   1272       3      18         158       0     254      26712        0
         TURNSTILE    136     166      23         166       0      62      25704        0
             KNOTE    160      31     119       14632       0      62      24000        0
            ttyinq    160     135      15         300       0      62      24000        0
          8 Bucket     80      46     254         728       0     126      24000        0
           ttyoutq    256      72      18         160       0      62      23040        0
       mbuf_packet    256       0      90         580       0     254      23040        0
        malloc-384    384      36      24         218       0      30      23040        0
        malloc-384    384      54       6          56       0      30      23040        0
        malloc-256    256      66      24         426       0      62      23040        0
        malloc-256    256      57      33         645       0      62      23040        0
         sctp_asoc   2288       2       8          29       0     254      22880        0
       malloc-4096   4096       5       0           5       0       2      20480        0
       malloc-4096   4096       3       2         938       0       2      20480        0
         malloc-64     64      72     243       31322       0     254      20160        0
         malloc-64     64     224      91         319       0     254      20160        0
             Files     80     203      47        7640       0     126      20000        0
        malloc-128    128     100      55         277       0     126      19840        0
        malloc-128    128      72      83         314       0     126      19840        0
        SLEEPQUEUE     88     166      58         166       0     126      19712        0
       Mountpoints   2752       2       5           2       0       4      19264        0
        malloc-256    256      61      14         458       0      62      19200        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-2048   2048       2       6          31       0       8      16384        0
       malloc-1024   1024       8       8          12       0      16      16384        0
         malloc-64     64     166      86         217       0     254      16128        0
         malloc-32     32      88     416         745       0     254      16128        0
         16 Bucket    144      48      64         352       0      62      16128        0
      vtnet_tx_hdr     24       0     668      222980       0     254      16032        0
        malloc-384    384      22      18         362       0      30      15360        0
        malloc-256    256      29      31         197       0      62      15360        0
             tcpcb   1080       4      10          33       0     254      15120        0
       tcp_bbr_pcb    832       0      18          23       0      16      14976        0
       malloc-2048   2048       5       1           9       0       8      12288        0
       malloc-2048   2048       3       3           9       0       8      12288        0
       malloc-2048   2048       3       3         194       0       8      12288        0
       malloc-1024   1024       3       9          30       0      16      12288        0
       malloc-1024   1024       8       4         183       0      16      12288        0
       malloc-1024   1024       7       5           7       0      16      12288        0
        malloc-512    512       0      24         130       0      30      12288        0
               PWD     32      16     362         214       0     254      12096        0
         malloc-32     32      90     288        4158       0     254      12096        0
         udp_inpcb    496       6      18         166       0     254      11904        0
        malloc-128    128      55      38         369       0     126      11904        0
              kenv    258      15      30        1026       0      30      11610        0
             unpcb    256      18      27        1209       0     254      11520        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-4096   4096       0       2           3       0       2       8192        0
       malloc-2048   2048       2       2           4       0       8       8192        0
       malloc-1024   1024       2       6          11       0      16       8192        0
        malloc-512    512       4      12           6       0      30       8192        0
        malloc-512    512       5      11          76       0      30       8192        0
        malloc-512    512       8       8           8       0      30       8192        0
        sctp_raddr    736       2       9          29       0     254       8096        0
           rtentry    176      30      16          34       0      62       8096        0
              PGRP     88      26      66          36       0     126       8096        0
          rl_entry     40      36     166          36       0     254       8080        0
        sctp_laddr     48       4     164          17       0     254       8064        0
             udpcb     32      10     242         170       0     254       8064        0
              ertt     72       4     108          33       0     126       8064        0
         malloc-64     64      55      71         373       0     254       8064        0
         malloc-64     64      63      63         100       0     254       8064        0
         malloc-32     32     130     122         286       0     254       8064        0
         malloc-32     32      61     191          80       0     254       8064        0
         malloc-32     32      41     211         303       0     254       8064        0
         malloc-32     32      54     198         227       0     254       8064        0
         malloc-32     32      17     235          30       0     254       8064        0
          4 Bucket     48       7     161          63       0     254       8064        0
          2 Bucket     32      52     200         549       0     254       8064        0
         malloc-16     16      27     473         174       0     254       8000        0
         malloc-16     16      56     444         325       0     254       8000        0
         malloc-16     16      19     481         251       0     254       8000        0
         malloc-16     16      39     461         176       0     254       8000        0
         malloc-16     16     286     214       25355       0     254       8000        0
         malloc-16     16       4     496         150       0     254       8000        0
             ripcb    496       5      11           8       0     254       7936        0
     udplite_inpcb    496       4      12           4       0     254       7936        0
         tcp_inpcb    496       4      12          33       0     254       7936        0
        malloc-128    128      38      24          54       0     126       7936        0
     routing nhops    256      26       4          34       0      62       7680        0
        malloc-256    256      13      17         531       0      62       7680        0
            cpuset    104       8      54           8       0     126       6448        0
 epoch_record pcpu    256       4      12           4       0      62       4096        0
       malloc-4096   4096       0       1           1       0       2       4096        0
       malloc-1024   1024       1       3           2       0      16       4096        0
        malloc-512    512       0       8           1       0      30       4096        0
        malloc-512    512       5       3           5       0      30       4096        0
        malloc-512    512       0       8           1       0      30       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
sctp_stream_msg_out    112       3      33           4       0     254       4032        0
         hostcache     64       1      62           1       0     254       4032        0
          syncache    168       0      24           4       0     254       4032        0
         malloc-16     16       0     250           7       0     254       4000        0
        sctp_chunk    152       1      25           1       0     254       3952        0
       UMA Slabs 1    176       9      13           9       0      62       3872        0
        malloc-384    384       0      10           1       0      30       3840        0
        malloc-384    384       2       8           2       0      30       3840        0
        malloc-384    384       1       9           1       0      30       3840        0
            mqnode    416       3       6           3       0      30       3744        0
        KMAP ENTRY     96      12      27          14       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
           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
   sctp_asconf_ack     48       0       0           0       0     254          0        0
       sctp_asconf     40       0       0           0       0     254          0        0
        sctp_readq    152       0       0           0       0     254          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      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    312       0       0           0       0     254          0        0
           pf tags    104       0       0           0       0     126          0        0
          pf mtags     48       0       0           0       0     254          0        0
      tcp_rack_pcb    832       0       0           0       0      16          0        0
      tcp_rack_map    112       0       0           0       0     126          0        0
      tcp_log_node    120       0       0           0       0     126          0        0
    tcp_log_bucket    176       0       0           0       0      62          0        0
           tcp_log    416       0       0           0       0     254          0        0
          tcpreass     48       0       0           0       0     254          0        0
tfo_ccache_entries     80       0       0           0       0     126          0        0
               tfo      4       0       0           0       0     254          0        0
          sackhole     32       0       0           0       0     254          0        0
             tcptw     88       0       0           0       0     254          0        0
               ipq     56       0       0           0       0     254          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
            itimer    352       0       0           0       0      30          0        0
            AIOLIO    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    592       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-8192   8192       0       0           0       0       1          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 (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/09/28 04:13 freebsd-src 72c89ce97ba3 78494d16 console log report ci-freebsd-main Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/28 00:04 freebsd-src 74237127e340 78494d16 console log report ci-freebsd-main Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/27 10:20 freebsd-src 15d077995bd2 78494d16 console log report ci-freebsd-main Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/27 00:21 freebsd-src 15d077995bd2 78494d16 console log report ci-freebsd-main Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/26 00:12 freebsd-src f766826fe3b8 8cac236e console log report ci-freebsd-main Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/28 22:05 freebsd-src f3aa0098a82e d82cb927 console log report ci-freebsd-i386 Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/28 09:11 freebsd-src 72c89ce97ba3 78494d16 console log report ci-freebsd-i386 Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/27 17:35 freebsd-src 74237127e340 78494d16 console log report ci-freebsd-i386 Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/27 00:35 freebsd-src 15d077995bd2 78494d16 console log report ci-freebsd-i386 Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/26 18:32 freebsd-src fb640be4e944 8cac236e console log report ci-freebsd-i386 Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/26 08:20 freebsd-src fb640be4e944 8cac236e console log report ci-freebsd-i386 Fatal trap NUM: page fault in sctp_ss_fb_select
2021/09/25 21:29 freebsd-src f766826fe3b8 8cac236e console log report ci-freebsd-i386 Fatal trap NUM: page fault in sctp_ss_fb_select
* Struck through repros no longer work on HEAD.