syzbot


panic: Assertion in_epoch(net_epoch_preempt) failed at /syzkaller/managers/i386/kernel/sys/netinet/in_pcb.c:LINE

Status: auto-closed as invalid on 2020/04/22 06:45
Reported-by: syzbot+e31db5ffd9361af0a9d8@syzkaller.appspotmail.com
First crash: 1527d, last: 1527d

Sample crash report:
login: panic: Assertion in_epoch(net_epoch_preempt) failed at /syzkaller/managers/i386/kernel/sys/netinet/in_pcb.c:1267
cpuid = 0
time = 1579761833
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0024514750
vpanic() at vpanic+0x1ce/frame 0xfffffe00245147c0
panic() at panic+0x43/frame 0xfffffe0024514820
in_pcbconnect_setup() at in_pcbconnect_setup+0x5b5/frame 0xfffffe00245148e0
in_pcbconnect_mbuf() at in_pcbconnect_mbuf+0x9f/frame 0xfffffe0024514940
udp6_connect() at udp6_connect+0x388/frame 0xfffffe00245149b0
soconnectat() at soconnectat+0x183/frame 0xfffffe0024514a10
kern_connectat() at kern_connectat+0x1ec/frame 0xfffffe0024514a70
sys_connect() at sys_connect+0xd9/frame 0xfffffe0024514ab0
ia32_syscall() at ia32_syscall+0x48c/frame 0xfffffe0024514bf0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x81425c0
KDB: enter: panic
[ thread pid 901 tid 100234 ]
Stopped at      kdb_enter+0x67: movq    $0,0x1466de6(%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                           0
rax                       0x12
rcx         0xfffffe0027000000
rdx                    0x3ffff
rbx                          0
rsp         0xfffffe0024514730
rbp         0xfffffe0024514750
rsi                    0x40001
rdi         0xffffffff810ba276  vprintf+0x176
r8                           0
r9                  0xffffffff
r10                 0xffffffff
r11         0xfffff8003ad29bd0
r12         0xffffffff82068d90  ddb_dbbe
r13                          0
r14         0xffffffff819363ab
r15         0xffffffff819363ab
rip         0xffffffff810af337  kdb_enter+0x67
rflags                0x200086  kernphys+0x86
kdb_enter+0x67: movq    $0,0x1466de6(%rip)
db> show proc
Process 901 (syz-executor.1) at 0xfffff8003ac80530:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 769 at 0xfffff8003a64d000
 ABI: FreeBSD ELF32
 arguments: /root/syz-executor.1
 reaper: 0xfffff800032fa530 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffff8003ae5b000
   (map 0xfffff8003ae5b000)
   (map.pmap 0xfffff8003ae5b0c0)
   (pmap 0xfffff8003ae5b120)
 threads: 2
100133                   RunQ                                syz-executor.1
100234                   Run     CPU 0                       syz-executor.1
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  901   769   769     0  R       (threaded)                  syz-executor.1
100133                   RunQ                                syz-executor.1
100234                   Run     CPU 0                       syz-executor.1
  900   771   771     0  R       (threaded)                  syz-executor.2
100191                   Run     CPU 1                       syz-executor.2
100232                   S       fifoor  0xfffff80003389f68  syz-executor.2
  899   778   778     0  S       (threaded)                  syz-executor.3
100129                   S       nanslp  0xffffffff824fed21  syz-executor.3
100231                   S       accept  0xfffff80003e90168  syz-executor.3
100233                   S       uwait   0xfffff80003a48480  syz-executor.3
  897   768   768     0  S       (threaded)                  syz-executor.0
100117                   S       nanslp  0xffffffff824fed20  syz-executor.0
100223                   S       select  0xfffff80003d2c040  syz-executor.0
100224                   S       uwait   0xfffff80003300880  syz-executor.0
  865     1   865     0  Ss      select  0xfffff80003d2c1c0  rtsol
  864     1   864     0  Ss      select  0xfffff8003a7cc7c0  rtsol
  863     1   863     0  Ss      select  0xfffff80003d2c240  rtsol
  860   783   422     0  S       kqread  0xfffff80003b33b00  rtsol
  783   774   422     0  S       wait    0xfffff8003a64fa60  sh
  778   766   778     0  Ss      nanslp  0xffffffff824fed20  syz-executor.3
  774   422   422     0  S       wait    0xfffff8003a64e000  sh
  771   766   771     0  Ss      nanslp  0xffffffff824fed21  syz-executor.2
  769   766   769     0  Ss      nanslp  0xffffffff824fed21  syz-executor.1
  768   766   768     0  Ss      nanslp  0xffffffff824fed20  syz-executor.0
  766   764   764     0  S       (threaded)                  syz-fuzzer
100096                   S       uwait   0xfffff80003a47380  syz-fuzzer
100098                   S       uwait   0xfffff80003a47580  syz-fuzzer
100099                   S       uwait   0xfffff80003a47680  syz-fuzzer
100100                   S       uwait   0xfffff80003cd5c80  syz-fuzzer
100101                   S       uwait   0xfffff80003a48f00  syz-fuzzer
100102                   S       uwait   0xfffff80003a47080  syz-fuzzer
100103                   S       uwait   0xfffff80003cd5100  syz-fuzzer
100104                   S       uwait   0xfffff80003cd5200  syz-fuzzer
100105                   S       kqread  0xfffff80003b33e00  syz-fuzzer
100107                   S       uwait   0xfffff80003cd5500  syz-fuzzer
  764   762   764     0  Ss      pause   0xfffff8003a64d5d8  csh
  762   680   762     0  Ss      select  0xfffff80003c88640  sshd
  746     1   746     0  Ss+     ttyin   0xfffff800033f7cb0  getty
  745     1   745     0  Ss+     ttyin   0xfffff800033f8cb0  getty
  744     1   744     0  Ss+     ttyin   0xfffff80003abb0b0  getty
  743     1   743     0  Ss+     ttyin   0xfffff80003abb4b0  getty
  742     1   742     0  Ss+     ttyin   0xfffff80003abb8b0  getty
  741     1   741     0  Ss+     ttyin   0xfffff80003abbcb0  getty
  740     1   740     0  Ss+     ttyin   0xfffff80003abe0b0  getty
  739     1   739     0  Ss+     ttyin   0xfffff80003abe4b0  getty
  738     1   738     0  Ss+     ttyin   0xfffff80003abe8b0  getty
  736     1    22     0  S+      piperd  0xfffff80003d97be0  logger
  735   734    22     0  S+      nanslp  0xffffffff824fed20  sleep
  734     1    22     0  S+      wait    0xfffff80003544a60  sh
  684     1   684     0  Ss      nanslp  0xffffffff824fed21  cron
  680     1   680     0  Ss      select  0xfffff80003ce11c0  sshd
  493     1   493     0  Ss      select  0xfffff80003c88940  syslogd
  422     1   422     0  Ss      wait    0xfffff80003eb7530  devd
  421     1   421    65  Ss      select  0xfffff80003c888c0  dhclient
  336     1   336     0  Ss      select  0xfffff80003ce1240  dhclient
  333     1   333     0  Ss      select  0xfffff80003d2b340  dhclient
   21     0     0     0  DL      syncer  0xffffffff825d5198  [syncer]
   20     0     0     0  DL      vlruwt  0xfffff80003b04000  [vnlru]
   19     0     0     0  DL      (threaded)                  [bufdaemon]
100065                   D       qsleep  0xffffffff825d4698  [bufdaemon]
100070                   D       -       0xffffffff8200a980  [bufspacedaemon-0]
100080                   D       sdflush 0xfffff80003cfd8e8  [/ worker]
   18     0     0     0  DL      psleep  0xffffffff825f0108  [vmdaemon]
   17     0     0     0  DL      (threaded)                  [pagedaemon]
100063                   D       psleep  0xffffffff8261d058  [dom0]
100068                   D       launds  0xffffffff8261d064  [laundry: dom0]
100069                   D       umarcl  0xffffffff8153d4b0  [uma]
   16     0     0     0  DL      -       0xffffffff823595b0  [rand_harvestq]
   15     0     0     0  DL      waiting 0xffffffff82662620  [sctp_iterator]
    9     0     0     0  DL      -       0xffffffff825d409c  [soaiod4]
    8     0     0     0  DL      -       0xffffffff825d409c  [soaiod3]
    7     0     0     0  DL      -       0xffffffff825d409c  [soaiod2]
    6     0     0     0  DL      -       0xffffffff825d409c  [soaiod1]
    5     0     0     0  DL      (threaded)                  [cam]
100031                   D       -       0xffffffff822349c0  [doneq0]
100062                   D       -       0xffffffff82234888  [scanner]
    4     0     0     0  DL      crypto_ 0xfffff800031f8e90  [crypto returns 1]
    3     0     0     0  DL      crypto_ 0xfffff800031f8e30  [crypto returns 0]
    2     0     0     0  DL      crypto_ 0xffffffff825ea178  [crypto]
   14     0     0     0  DL      seqstat 0xfffff80003362888  [sequencer 00]
   13     0     0     0  DL      (threaded)                  [geom]
100022                   D       -       0xffffffff8261b688  [g_event]
100023                   D       -       0xffffffff8261b698  [g_up]
100024                   D       -       0xffffffff8261b690  [g_down]
   12     0     0     0  WL      (threaded)                  [intr]
100006                   I                                   [swi5: fast taskq]
100010                   I                                   [swi6: task queue]
100011                   I                                   [swi6: Giant taskq]
100017                   I                                   [swi3: vm]
100018                   I                                   [swi4: clock (0)]
100019                   I                                   [swi4: clock (1)]
100020                   I                                   [swi1: netisr 0]
100032                   I                                   [irq24: virtio_pci0]
100033                   I                                   [irq25: virtio_pci0]
100034                   I                                   [irq26: virtio_pci0]
100035                   I                                   [irq27: virtio_pci0]
100036                   I                                   [irq28: virtio_pci1]
100037                   I                                   [irq29: virtio_pci1]
100038                   I                                   [irq30: virtio_pci1]
100039                   I                                   [irq31: virtio_pci1]
100040                   I                                   [irq32: virtio_pci1]
100045                   I                                   [irq10: virtio_pci2]
100047                   I                                   [irq1: atkbd0]
100048                   I                                   [irq12: psm0]
100049                   I                                   [swi0: uart uart++]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffff800032fa530  [init]
   10     0     0     0  DL      audit_w 0xffffffff826632b0  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff82609c78  [swapper]
100005                   D       -       0xfffff8000333d000  [thread taskq]
100007                   D       -       0xfffff8000333cd00  [kqueue_ctx taskq]
100008                   D       -       0xfffff8000333cc00  [config_0]
100009                   D       -       0xfffff8000333cb00  [aiod_kick taskq]
100012                   D       -       0xfffff8000333c800  [if_config_tqg_0]
100013                   D       -       0xfffff8000333c700  [if_io_tqg_0]
100014                   D       -       0xfffff8000333c600  [if_io_tqg_1]
100015                   D       -       0xfffff8000333c500  [softirq_0]
100016                   D       -       0xfffff8000333c400  [softirq_1]
100021                   D       -       0xfffff8000333c300  [firmware taskq]
100026                   D       -       0xfffff8000333c200  [crypto_0]
100027                   D       -       0xfffff8000333c200  [crypto_1]
100041                   D       -       0xfffff8000333c000  [vtnet0 rxq 0]
100042                   D       -       0xfffff8000333be00  [vtnet0 txq 0]
100043                   D       -       0xfffff8000333bd00  [vtnet0 rxq 1]
100044                   D       -       0xfffff8000333bc00  [vtnet0 txq 1]
100046                   D       vtbslp  0xfffff800034d4400  [virtio_balloon]
100050                   D       -       0xfffff8000333bb00  [mca taskq]
100054                   D       -       0xffffffff81cd9e00  [deadlkres]
100057                   D       -       0xfffff80003b36100  [acpi_task_0]
100058                   D       -       0xfffff80003b36100  [acpi_task_1]
100059                   D       -       0xfffff80003b36100  [acpi_task_2]
100061                   D       -       0xfffff8000333c100  [CAM taskq]
db> show all locks
Process 901 (syz-executor.1) thread 0xfffff8003ad296e0 (100234)
exclusive sleep mutex pcbinfohash (pcbinfohash) r = 0 (0xfffffe0004959ad8) locked @ /syzkaller/managers/i386/kernel/sys/netinet6/udp6_usrreq.c:1218
exclusive rw udpinp (udpinp) r = 0 (0xfffff80003f205d8) locked @ /syzkaller/managers/i386/kernel/sys/netinet6/udp6_usrreq.c:1194
Process 900 (syz-executor.2) thread 0xfffff8003ad1c6e0 (100191)
exclusive sleep mutex umtxql (umtxql) r = 0 (0xffffffff8250c320) locked @ /syzkaller/managers/i386/kernel/sys/kern/kern_umtx.c:507
db> show malloc
              Type        InUse        MemUse     Requests
            devbuf         4213         4851K         4238
             vtbuf           24         1968K           46
         sysctloid        26527         1553K        26591
              kobj          331         1324K          487
            newblk          582         1170K          803
          vfscache            4         1025K            4
          inodedep           77          550K          145
               pcb           27          537K          104
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          388K            4
           subproc          131          269K          975
            acpica         1674          185K        49750
         vnet_data            1          168K            1
          filedesc           21          149K          145
           pagedep           26          135K           72
        tfo_ccache            1          128K            1
               sem            4          106K            4
            DEVFS1          105          105K          122
            linker          221           89K          252
               bus          990           79K         3330
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          493           62K          493
              umtx          292           37K          292
           kdtrace          181           35K         1973
        gtaskqueue           22           34K           22
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          124           31K          134
               msg            4           30K            4
        DEVFS_RULE           56           27K           56
            ifaddr           70           23K           72
            kbdmux            6           22K            6
              vmem            3           19K            4
               BPF           14           19K           14
           lltable           47           18K           47
              temp           34           17K         1821
         ufs_mount            3           17K            4
              proc            3           17K            3
               tty           16           16K           16
           tidhash            1           16K            1
           ithread           89           15K           89
       ether_multi          172           14K          177
            bus-sc           30           14K         1394
            KTRACE          100           13K          100
             ifnet            7           13K            7
              kenv           95           12K           99
      eventhandler          123           11K          123
         in6_multi           89           11K           89
         pfs_nodes           20           10K           20
              GEOM           60           10K          487
              rman           82           10K          423
         bmsafemap            3            9K          120
            kqueue           62            9K          908
           devstat            4            9K            4
              UART           12            9K           12
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
          routetbl           57            8K           61
     audit_evclass          231            8K          289
              cred           28            7K          196
            diradd           49            7K          117
           CAM DEV            3            6K          508
                vt           11            6K           11
            plimit           21            6K          333
            sglist            5            6K            5
         CAM queue            5            6K         1522
       ufs_dirhash           24            5K           24
         taskqueue           42            5K           42
            DEVFSP           70            5K           74
          freework           18            5K          138
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
          kcovinfo           64            4K           68
               UMA          234            4K          234
            select           27            4K           27
           session           27            4K           36
              pgrp           27            4K           36
             hhook           13            4K           13
             mkdir           24            3K          124
            dirrem           23            3K           85
           acpisem           22            3K           22
          indirdep           11            3K          115
          terminal           11            3K           11
         proc-args           49            3K          536
           uidinfo            4            3K            4
          sctp_ifa           17            3K           17
        local_apic            1            2K            1
           io_apic            1            2K            1
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           20
           CAM XPT           22            2K          541
            Unitno           27            2K           45
             lockf           15            2K           22
          in_multi            6            2K            7
           acpidev           20            2K           20
          freeblks            5            2K           77
            crypto            2            2K            2
               msi            9            2K            9
               tun            7            2K            7
         newdirblk           16            1K           62
          freefile            8            1K           62
       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          270
               mld            6            1K            6
          sctp_ifn            6            1K            6
              igmp            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           86
          pci_link           10            1K           10
           CAM SIM            2            1K            2
           softdep            1            1K            1
              pfil            4            1K            4
    chacha20random            1            1K            1
             epoch            4            1K            4
              cdev            2            1K            2
 encap_export_host            8            1K            8
       inpcbpolicy           12            1K          208
               osd            3            1K            9
            vnodes            2            1K            8
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            feeder            7            1K            7
        loginclass            3            1K            3
            soname            5            1K         5718
          CAM path            4            1K         1030
            apmdev            1            1K            1
          atkbddev            2            1K            2
          pmchooks            1            1K            1
            prison            4            1K            4
     CAM dev queue            2            1K            2
 CAM I/O Scheduler            1            1K            1
          filecaps            4            1K           78
          nexusdev            5            1K            5
           entropy            2            1K           37
           tcpfunc            1            1K            1
          sctp_vrf            1            1K            1
              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
           CAM CCB            0            0K         2252
        madt_table            0            0K            2
               PUC            0            0K            0
          ppbusdev            0            0K            0
agtiapi_MemAlloc malloc            0            0K            0
    osti_cacheable            0            0K            0
          tempbuff            0            0K            0
          tempbuff            0            0K            0
            pvscsi            0            0K            0
          smartpqi            0            0K            0
ag_tgt_map_t malloc            0            0K            0
ag_slr_map_t malloc            0            0K            0
lDevFlags * malloc            0            0K            0
tiDeviceHandle_t * malloc            0            0K            0
ag_portal_data_t malloc            0            0K            0
ag_device_t malloc            0            0K            0
     STLock malloc            0            0K            0
          CCB List            0            0K            0
              iavf            0            0K            0
               ixl            0            0K            0
            sr_iov            0            0K            0
               OCS            0            0K            0
               OCS            0            0K            0
              nvme            0            0K            0
               nvd            0            0K            0
            netmap            0            0K            0
            mwldev            0            0K            0
        MVS driver            0            0K            0
       fpukern_ctx            0            0K            0
          xen_intr            0            0K            0
     CAM ccb queue            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            qpidrv            0            0K            0
          mrsasbuf            0            0K            0
          mpt_user            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
       dmar_dmamap            0            0K            0
          mps_user            0            0K            0
            MPSSAS            0            0K            0
              isci            0            0K            0
           bxe_ilt            0            0K            0
            xenbus            0            0K            0
     vm_fictitious            0            0K            0
               mps            0            0K            0
          mpr_user            0            0K            0
            MPRSAS            0            0K            0
           UMAHash            0            0K            0
         vm_pgdata            0            0K            0
           jblocks            0            0K            0
          savedino            0            0K          103
          sentinel            0            0K            0
            jfsync            0            0K            0
            jtrunc            0            0K            0
             sbdep            0            0K            3
           jsegdep            0            0K            0
              jseg            0            0K            0
         jfreefrag            0            0K            0
          jfreeblk            0            0K            0
           jnewblk            0            0K            0
            jmvref            0            0K            0
           jremref            0            0K            0
           jaddref            0            0K            0
           freedep            0            0K            0
          freefrag            0            0K            5
        allocindir            0            0K            0
       allocdirect            0            0K            0
          ufs_trim            0            0K            0
           mactemp            0            0K            0
     audit_trigger            0            0K            0
 audit_pipe_presel            0            0K            0
     audit_pipeent            0            0K            0
        audit_pipe            0            0K            0
      audit_evname            0            0K            0
         audit_bsm            0            0K            0
      audit_gidset            0            0K            0
        audit_text            0            0K            0
        audit_path            0            0K            0
        audit_data            0            0K            0
        audit_cred            0            0K            0
             xform            0            0K            0
               NLM            0            0K            0
 nfsclient_nlminfo            0            0K            0
    nfsclient_lock            0            0K            0
           NFS FHA            0            0K            0
    ipsec-spdcache            0            0K            0
         ipsec-reg            0            0K            0
        ipsec-misc            0            0K            0
      ipsecrequest            0            0K            0
            ip6opt            0            0K            4
       ip6_msource            0            0K            0
      ip6_moptions            0            0K            0
       in6_mfilter            0            0K            0
             frag6            0            0K            0
            tcplog            0            0K            0
               LRO            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K            0
         sctp_iter            0            0K            9
         sctp_mvrf            0            0K            0
         sctp_timw            0            0K            0
         sctp_cpal            0            0K            0
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
         sctp_athi            0            0K            0
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db> show ktr
No such command; use "help" to list available commands

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/01/23 06:44 freebsd b17accbc49bb 3334d684 console log report ci-freebsd-i386
2020/01/23 06:11 freebsd b17accbc49bb 3334d684 console log report ci-freebsd-i386
2020/01/23 03:40 freebsd b17accbc49bb 3334d684 console log report ci-freebsd-i386
2020/01/23 03:30 freebsd b17accbc49bb 3334d684 console log report ci-freebsd-i386
2020/01/22 21:56 freebsd b17accbc49bb 3334d684 console log report ci-freebsd-i386
2020/01/22 21:06 freebsd b17accbc49bb 3334d684 console log report ci-freebsd-i386
2020/01/22 15:47 freebsd b17accbc49bb 8eda0b95 console log report ci-freebsd-i386
* Struck through repros no longer work on HEAD.