syzbot


Fatal trap 9: general protection fault in fib4_lookup_nh_ext

Status: auto-closed as invalid on 2020/07/25 10:25
Reported-by: syzbot+b932b690095f1988af6c@syzkaller.appspotmail.com
First crash: 1489d, last: 1488d

Sample crash report:
Fatal trap 9: general protection fault while in kernel mode
cpuid = 1; apic id = 01
instruction pointer	= 0x20:0xffffffff812b4d1c
stack pointer	        = 0x28:0xfffffe002588b3b0
frame pointer	        = 0x28:0xfffffe002588b450
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		= 870 (syz-executor.1)
trap number		= 9
panic: general protection fault
cpuid = 1
time = 1587896642
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002588b080
vpanic() at vpanic+0x1c7/frame 0xfffffe002588b0e0
panic() at panic+0x43/frame 0xfffffe002588b140
trap_fatal() at trap_fatal+0x4ca/frame 0xfffffe002588b1c0
trap() at trap+0xda/frame 0xfffffe002588b2e0
calltrap() at calltrap+0x8/frame 0xfffffe002588b2e0
--- trap 0x9, rip = 0xffffffff812b4d1c, rsp = 0xfffffe002588b3b0, rbp = 0xfffffe002588b450 ---
fib4_lookup_nh_ext() at fib4_lookup_nh_ext+0xdc/frame 0xfffffe002588b450
icmp_reflect() at icmp_reflect+0x492/frame 0xfffffe002588b520
icmp_error() at icmp_error+0xcbd/frame 0xfffffe002588b5b0
rip_input() at rip_input+0x7ac/frame 0xfffffe002588b640
ip_input() at ip_input+0x388/frame 0xfffffe002588b6e0
netisr_dispatch_src() at netisr_dispatch_src+0x107/frame 0xfffffe002588b740
ether_demux() at ether_demux+0x267/frame 0xfffffe002588b790
ether_nh_input() at ether_nh_input+0x7aa/frame 0xfffffe002588b810
netisr_dispatch_src() at netisr_dispatch_src+0x107/frame 0xfffffe002588b870
ether_input() at ether_input+0xcb/frame 0xfffffe002588b8e0
tunwrite() at tunwrite+0x919/frame 0xfffffe002588b970
devfs_write_f() at devfs_write_f+0x135/frame 0xfffffe002588b9f0
dofilewrite() at dofilewrite+0xb0/frame 0xfffffe002588ba40
sys_write() at sys_write+0x10c/frame 0xfffffe002588bac0
amd64_syscall() at amd64_syscall+0x262/frame 0xfffffe002588bbf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe002588bbf0
--- syscall (4, FreeBSD ELF64, sys_write), rip = 0x483c0a, rsp = 0x7fffdfffdef8, rbp = 0x7fffdfffdf30 ---
KDB: enter: panic
[ thread pid 870 tid 100143 ]
Stopped at      kdb_enter+0x67: movq    $0,0x14a9b06(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b  ll+0x1a
es                        0x3b  ll+0x1a
fs                        0x13
gs                        0x1b
ss                        0x28  ll+0x7
rax                       0x12
rcx         0xfffffe0028200000
rdx                    0x3ffff
rbx                          0
rsp         0xfffffe002588b060
rbp         0xfffffe002588b080
rsi                    0x40001
rdi         0xffffffff810b8ae6  vprintf+0x176
r8                           0
r9                  0xffffffff
r10                 0xffee0011
r11         0xfffffe0025793110
r12         0xffffffff82068ea0  ddb_dbbe
r13                          0
r14         0xffffffff81943078
r15         0xffffffff81943078
rip         0xffffffff810add67  kdb_enter+0x67
rflags                    0x86  ll+0x65
kdb_enter+0x67: movq    $0,0x14a9b06(%rip)
db> show proc
Process 870 (syz-executor.1) at 0xfffff8003bb47520:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 771 at 0xfffff80003c9aa40
 ABI: FreeBSD ELF64
 arguments: /root/syz-executor.1
 reaper: 0xfffff8000331a000 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe0025b879e8
   (map 0xfffffe0025b879e8)
   (map.pmap 0xfffffe0025b87aa8)
   (pmap 0xfffffe0025b87b08)
 threads: 2
100118                   RunQ                                syz-executor.1
100143                   Run     CPU 1                       syz-executor.1
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  871   770   770     0  R       (threaded)                  syz-executor.0
100131                   RunQ                                syz-executor.0
100142                   S       sbwait  0xfffffe00239d737c  syz-executor.0
100144                   RunQ                                syz-executor.0
  870   771   771     0  R       (threaded)                  syz-executor.1
100118                   RunQ                                syz-executor.1
100143                   Run     CPU 1                       syz-executor.1
  869   811   811     0  RE      CPU 0                       syz-executor.3
  866   792   792     0  R       (threaded)                  syz-executor.2
100119                   RunQ                                syz-executor.2
100134                   S       accept  0xfffffe00239d84f0  syz-executor.2
100137                   S       uwait   0xfffff8003b2ec900  syz-executor.2
100138                   S       uwait   0xfffff8003b2ec800  syz-executor.2
100139                   S       uwait   0xfffff8003b12c980  syz-executor.2
  863     1   863     0  Ss      select  0xfffff8003b58ccc0  rtsol
  860     1   860     0  Ss      select  0xfffff80003c04540  rtsol
  859     1   859     0  Ss      select  0xfffff8003b58ce40  rtsol
  856   783   424     0  S       kqread  0xfffff8000320b500  rtsol
  811   768   811     0  Rs                                  syz-executor.3
  792   768   792     0  Rs                                  syz-executor.2
  783   775   424     0  S       wait    0xfffff8003b5a3a40  sh
  775   424   424     0  S       wait    0xfffff8003b5a8000  sh
  771   768   771     0  Rs                                  syz-executor.1
  770   768   770     0  Rs                                  syz-executor.0
  768   766   766     0  S       (threaded)                  syz-fuzzer
100079                   S       kqread  0xfffff8000320b200  syz-fuzzer
100104                   S       uwait   0xfffff80003d8a700  syz-fuzzer
100105                   S       uwait   0xfffff800030f4800  syz-fuzzer
100106                   S       uwait   0xfffff800030f4900  syz-fuzzer
100107                   S       uwait   0xfffff800030f4a00  syz-fuzzer
100108                   S       uwait   0xfffff800030f4b00  syz-fuzzer
100109                   S       uwait   0xfffff8003b2eca00  syz-fuzzer
100110                   S       uwait   0xfffff8003b2ecb00  syz-fuzzer
100111                   S       uwait   0xfffff8003b2ecc00  syz-fuzzer
100112                   S       uwait   0xfffff8003b2ece80  syz-fuzzer
100113                   S       uwait   0xfffff80003d8a000  syz-fuzzer
  766   764   766     0  Ss      pause   0xfffff80003c995c8  csh
  764   682   764     0  Ss      select  0xfffff800030847c0  sshd
  748     1   748     0  Ss+     ttyin   0xfffff8000356f8b0  getty
  747     1   747     0  Ss+     ttyin   0xfffff80003b6fcb0  getty
  746     1   746     0  Ss+     ttyin   0xfffff80003b6e4b0  getty
  745     1   745     0  Ss+     ttyin   0xfffff80003b6ecb0  getty
  744     1   744     0  Ss+     ttyin   0xfffff800033b74b0  getty
  743     1   743     0  Ss+     ttyin   0xfffff800033b7cb0  getty
  742     1   742     0  Ss+     ttyin   0xfffff800033b64b0  getty
  741     1   741     0  Ss+     ttyin   0xfffff800033b6cb0  getty
  740     1   740     0  Ss+     ttyin   0xfffff800033b94b0  getty
  738     1    24     0  S+      piperd  0xfffff8003b354000  logger
  737   736    24     0  S+      nanslp  0xffffffff8252c1f0  sleep
  736     1    24     0  S+      wait    0xfffff80003c9a520  sh
  686     1   686     0  Ss      nanslp  0xffffffff8252c1f0  cron
  682     1   682     0  Ss      select  0xfffff80003c04f40  sshd
  495     1   495     0  Ss      select  0xfffff80003c04e40  syslogd
  424     1   424     0  Ss      wait    0xfffff80003de2a40  devd
  423     1   423    65  Ss      select  0xfffff80003c04d40  dhclient
  338     1   338     0  Ss      select  0xfffff800030846c0  dhclient
  335     1   335     0  Ss      select  0xfffff80003c03040  dhclient
   23     0     0     0  DL      vlruwt  0xfffff800033e0520  [vnlru]
   22     0     0     0  DL      syncer  0xffffffff82618118  [syncer]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100069                   D       qsleep  0xffffffff82617438  [bufdaemon]
100076                   D       -       0xffffffff8200aa00  [bufspacedaemon-0]
100087                   D       sdflush 0xfffff80003c25ce8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff8263e308  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100067                   D       psleep  0xffffffff826328d8  [dom0]
100074                   D       launds  0xffffffff826328e4  [laundry: dom0]
100075                   D       umarcl  0xffffffff81544e70  [uma]
   18     0     0     0  DL      -       0xffffffff8235fe20  [rand_harvestq]
   17     0     0     0  DL      pftm    0xffffffff82c363a0  [pf purge]
   16     0     0     0  DL      waiting 0xffffffff8261a890  [sctp_iterator]
   15     0     0     0  DL      -       0xffffffff82616a2c  [soaiod4]
    9     0     0     0  DL      -       0xffffffff82616a2c  [soaiod3]
    8     0     0     0  DL      -       0xffffffff82616a2c  [soaiod2]
    7     0     0     0  DL      -       0xffffffff82616a2c  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100033                   D       -       0xffffffff82237b40  [doneq0]
100066                   D       -       0xffffffff82237a10  [scanner]
    5     0     0     0  DL      crypto_ 0xfffff8000320cd90  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffff8000320cd30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff826300c0  [crypto]
   14     0     0     0  DL      seqstat 0xfffff80003363488  [sequencer 00]
   13     0     0     0  DL      (threaded)                  [geom]
100024                   D       -       0xffffffff8250b180  [g_event]
100025                   D       -       0xffffffff8250b188  [g_up]
100026                   D       -       0xffffffff8250b190  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100017                   D       -       0xfffff80003084a00  [thr_0]
100018                   D       -       0xfffff80003084a40  [thr_1]
   12     0     0     0  WL      (threaded)                  [intr]
100010                   I                                   [swi6: Giant taskq]
100013                   I                                   [swi5: fast taskq]
100016                   I                                   [swi6: task queue]
100019                   I                                   [swi3: vm]
100020                   I                                   [swi4: clock (0)]
100021                   I                                   [swi4: clock (1)]
100022                   I                                   [swi1: netisr 0]
100034                   I                                   [irq24: virtio_pci0]
100035                   I                                   [irq25: virtio_pci0]
100036                   I                                   [irq26: virtio_pci0]
100037                   I                                   [irq27: virtio_pci0]
100038                   I                                   [irq28: virtio_pci1]
100039                   I                                   [irq29: virtio_pci1]
100040                   I                                   [irq30: virtio_pci1]
100041                   I                                   [irq31: virtio_pci1]
100042                   I                                   [irq32: virtio_pci1]
100047                   I                                   [irq10: virtio_pci2]
100049                   I                                   [irq1: atkbd0]
100050                   I                                   [irq12: psm0]
100051                   I                                   [swi0: uart uart++]
100060                   I                                   [swi1: pf send]
100072                   I                                   [swi1: hpts]
100073                   I                                   [swi1: hpts]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffff8000331a000  [init]
   10     0     0     0  DL      audit_w 0xffffffff82630598  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff8250b710  [swapper]
100005                   D       -       0xfffff80003338000  [if_config_tqg_0]
100006                   D       -       0xfffff80003339e00  [softirq_0]
100007                   D       -       0xfffff80003339d00  [softirq_1]
100008                   D       -       0xfffff80003339c00  [if_io_tqg_0]
100009                   D       -       0xfffff80003339b00  [if_io_tqg_1]
100011                   D       -       0xfffff8000333e000  [in6m_free taskq]
100012                   D       -       0xfffff8000333fe00  [thread taskq]
100014                   D       -       0xfffff8000333fc00  [kqueue_ctx taskq]
100015                   D       -       0xfffff8000333fb00  [aiod_kick taskq]
100023                   D       -       0xfffff8000333f900  [firmware taskq]
100028                   D       -       0xfffff8000333f800  [crypto_0]
100029                   D       -       0xfffff8000333f800  [crypto_1]
100043                   D       -       0xfffff8000333f500  [vtnet0 rxq 0]
100044                   D       -       0xfffff8000333f400  [vtnet0 txq 0]
100045                   D       -       0xfffff8000333f300  [vtnet0 rxq 1]
100046                   D       -       0xfffff8000333f200  [vtnet0 txq 1]
100048                   D       vtbslp  0xfffff800034fc580  [virtio_balloon]
100052                   D       -       0xfffff8000333f100  [mca taskq]
100057                   D       -       0xffffffff81ce6671  [deadlkres]
100062                   D       -       0xfffff80003b5e300  [acpi_task_0]
100063                   D       -       0xfffff80003b5e300  [acpi_task_1]
100064                   D       -       0xfffff80003b5e300  [acpi_task_2]
100065                   D       -       0xfffff8000333f700  [CAM taskq]
db> show all locks
Process 871 (syz-executor.0) thread 0xfffffe00257dd000 (100142)
exclusive sx so_rcv_sx (so_rcv_sx) r = 0 (0xfffffe00239d7320) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_sockbuf.c:419
Process 870 (syz-executor.1) thread 0xfffffe0025792c00 (100143)
shared rm rib head lock (rib head lock) r = 0 (0xfffff80003b01ce8) locked @ /syzkaller/managers/main/kernel/sys/netinet/in_fib.c:196
Process 869 (syz-executor.3) thread 0xfffffe0025791700 (100103)
exclusive sleep mutex vm active pagequeue (vm pagequeue) r = 0 (0xffffffff82632340) locked @ /syzkaller/managers/main/kernel/sys/vm/vm_page.c:3541
exclusive rw vm object (vm object) r = 0 (0xfffff8003be46630) locked @ /syzkaller/managers/main/kernel/sys/vm/vm_object.c:647
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4213         4851K         4238
          tcp_hpts            5         3201K            5
             vtbuf           24         1968K           46
         sysctloid        28335         1653K        28399
              kobj          332         1328K          488
            newblk          725         1205K         1110
          vfscache            4         1025K            4
               pcb           31          544K          100
          inodedep           46          535K           98
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          388K            4
           subproc          127          274K          939
            acpica         1674          185K        52709
         vnet_data            1          168K            1
           pagedep           20          133K           36
          filedesc           19          133K           81
        tfo_ccache            1          128K            1
               sem            4          106K            4
            DEVFS1          105          105K          122
            linker          244           92K          277
               bus          992           79K         3376
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          497           63K          497
           kdtrace          191           37K         1827
              umtx          288           36K          288
              temp           35           33K         1823
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          124           31K          134
               msg            4           30K            4
        DEVFS_RULE           56           27K           56
        gtaskqueue           18           26K           18
            ifaddr           70           23K           72
              vmem            3           22K            4
            kbdmux            6           22K            6
               BPF           14           19K           14
           lltable           47           18K           47
         ufs_mount            3           17K            4
              proc            3           17K            3
               tty           16           16K           16
           tidhash            1           16K            1
           ithread           98           16K           98
       ether_multi          172           14K          177
            bus-sc           30           14K         1431
            KTRACE          100           13K          100
             ifnet            7           13K            7
              kenv           95           12K           99
      eventhandler          132           12K          132
         in6_multi           89           11K           89
         pfs_nodes           20           10K           20
              GEOM           60           10K          486
              rman           82           10K          423
         bmsafemap            2            9K           67
            kqueue           64            9K          878
              UART           12            9K           12
           devstat            4            9K            4
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
     audit_evclass          233            8K          291
          routetbl           57            7K           61
           CAM DEV            3            6K          510
                vt           11            6K           11
            plimit           22            6K          335
              cred           22            6K          196
            sglist            5            6K            5
         CAM queue            5            6K         1528
         taskqueue           45            5K           45
       ufs_dirhash           24            5K           24
            DEVFSP           70            5K           74
          pf_ifnet           10            5K           19
           memdesc            1            4K            1
               MCA           32            4K           32
               UMA          249            4K          249
             evdev            4            4K            4
          kcovinfo           64            4K           68
            ip6ndp           19            4K           21
           session           27            4K           36
              pgrp           27            4K           36
             hhook           13            4K           13
           acpisem           22            3K           22
          terminal           11            3K           11
         proc-args           49            3K          536
          indirdep           10            3K           14
         sctp_atcl            5            3K           17
            select           19            3K           19
            diradd           18            3K           66
          freefile           18            3K           32
           uidinfo            3            3K            7
          sctp_ifa           17            3K           17
        local_apic            1            2K            1
           io_apic            1            2K            1
         newdirblk           16            2K           26
             mkdir           16            2K           52
         ipsec-saq            2            2K            2
         sctp_stro            2            2K            8
           CAM XPT           22            2K          543
             lockf           15            2K           22
         sctp_timw            6            2K            6
          in_multi            6            2K            7
            Unitno           25            2K           45
            dirrem            5            2K           34
           acpidev           20            2K           20
               msi            9            2K            9
               tun            7            2K            7
           softdep            1            1K            1
       ipsecpolicy            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             clone            8            1K            8
       vnodemarker            2            1K           10
      NFSD session            1            1K            1
        CAM periph            4            1K          271
               mld            6            1K            6
          sctp_ifn            6            1K            6
              igmp            6            1K            6
             nhops            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           86
          pci_link           10            1K           10
       inpcbpolicy           21            1K          192
            crypto            3            1K            3
              pfil            4            1K            4
    chacha20random            1            1K            1
           CAM SIM            2            1K            2
             epoch            4            1K            4
              cdev            2            1K            2
 encap_export_host            8            1K            8
               osd            3            1K            9
         sctp_atky            7            1K           25
          freework            2            1K           32
          freeblks            1            1K           31
            vnodes            1            1K            1
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            feeder            7            1K            7
           tcpfunc            3            1K            3
        loginclass            3            1K            6
     CAM dev queue            2            1K            2
 CAM I/O Scheduler            1            1K            1
            apmdev            1            1K            1
          atkbddev            2            1K            2
          CAM path            4            1K         1034
              ktls            1            1K            1
               iov            1            1K        13426
          pmchooks            1            1K            1
            prison            4            1K            4
            soname            4            1K         5781
          filecaps            4            1K           78
          nexusdev            5            1K            5
         sctp_athm            5            1K           17
           entropy            2            1K           36
          sctp_vrf            1            1K            1
          sctp_map            4            1K           16
              vnet            1            1K            1
          acpiintr            1            1K            1
               pmc            1            1K            1
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          p1003.1b            1            1K            1
          pf_table            0            0K            0
           pf_rule            0            0K            0
           pf_altq            0            0K            0
           pf_osfp            0            0K            0
           pf_temp            0            0K            0
           ath_hal            0            0K            0
        madt_table            0            0K            2
            athdev            0            0K            0
           ata_pci            0            0K            0
           ata_dma            0            0K            0
       ata_generic            0            0K            0
               amr            0            0K            0
           scsi_da            0            0K           69
            ata_da            0            0K            0
            pvscsi            0            0K            0
          smartpqi            0            0K            0
           scsi_ch            0            0K            0
           scsi_cd            0            0K            0
            USBdev            0            0K            0
               USB            0            0K            0
       AHCI driver            0            0K            0
               agp            0            0K            0
              iavf            0            0K            0
               ixl            0            0K            0
           nvme_da            0            0K            0
           acpipwr            0            0K            0
            twsbuf            0            0K            0
      twe_commands            0            0K            0
      twa_commands            0            0K            0
       tcp_log_dev            0            0K            0
      midi buffers            0            0K            0
       fpukern_ctx            0            0K            0
             mixer            0            0K            0
          xen_intr            0            0K            0
              ac97            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            qpidrv            0            0K            0
             hdacc            0            0K            0
              hdac            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
       dmar_dmamap            0            0K            0
              hdaa            0            0K            0
         acpi_perf            0            0K            0
         acpicmbat            0            0K            0
              isci            0            0K            0
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     vm_fictitious            0            0K            0
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agtiapi_MemAlloc malloc            0            0K            0
    osti_cacheable            0            0K            0
          tempbuff            0            0K            0
          tempbuff            0            0K            0
           UMAHash            0            0K            0
ag_tgt_map_t malloc            0            0K            0
ag_slr_map_t malloc            0            0K            0
         vm_pgdata            0            0K            0
           jblocks            0            0K            0
          savedino            0            0K           12
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            jtrunc            0            0K            0
             sbdep            0            0K            4
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          freefrag            0            0K            5
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           mactemp            0            0K            0
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 audit_pipe_presel            0            0K            0
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        audit_pipe            0            0K            0
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             frag6            0            0K            0
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lDevFlags * malloc            0            0K            0
               LRO            0            0K            0
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tiDeviceHandle_t * malloc            0            0K            0
            statfs            0            0K          200
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db> show ktr
No such command; use "help" to list available commands

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/04/26 10:24 freebsd 3188fdb7b877 0ce7569e console log report ci-freebsd-main
2020/04/26 05:58 freebsd 1bb1283aafd8 b8bb8e5f console log report ci-freebsd-main
2020/04/25 21:01 freebsd 1bb1283aafd8 b8bb8e5f console log report ci-freebsd-main
2020/04/26 06:06 freebsd 1bb1283aafd8 b8bb8e5f console log report ci-freebsd-i386
* Struck through repros no longer work on HEAD.