syzbot


panic: mutex if_addr_lock not owned at /syzkaller/managers/main/kernel/sys/netinet/in_mcast.c:LINE

Status: fixed on 2020/01/14 09:54
Reported-by: syzbot+871c5d1fd5fac6c28f52@syzkaller.appspotmail.com
Fix commit: 31069f383af1 Take the ifnet's address lock in igmp_v3_cancel_link_timers().
First crash: 1132d, last: 1132d

Sample crash report:
panic: mutex if_addr_lock not owned at /syzkaller/managers/main/kernel/sys/netinet/in_mcast.c:263
cpuid = 0
time = 1577830499
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002459b380
vpanic() at vpanic+0x1c7/frame 0xfffffe002459b3f0
panic() at panic+0x43/frame 0xfffffe002459b450
__mtx_assert() at __mtx_assert+0x18b/frame 0xfffffe002459b490
inm_disconnect() at inm_disconnect+0x34/frame 0xfffffe002459b4c0
igmp_v3_cancel_link_timers() at igmp_v3_cancel_link_timers+0x18b/frame 0xfffffe002459b500
igmp_input() at igmp_input+0xdbf/frame 0xfffffe002459b5c0
ip_input() at ip_input+0x3c3/frame 0xfffffe002459b6a0
netisr_dispatch_src() at netisr_dispatch_src+0x107/frame 0xfffffe002459b710
ether_demux() at ether_demux+0x267/frame 0xfffffe002459b760
ether_nh_input() at ether_nh_input+0x7c3/frame 0xfffffe002459b7e0
netisr_dispatch_src() at netisr_dispatch_src+0x107/frame 0xfffffe002459b850
ether_input() at ether_input+0xbb/frame 0xfffffe002459b8b0
tunwrite() at tunwrite+0x8fb/frame 0xfffffe002459b930
devfs_write_f() at devfs_write_f+0x135/frame 0xfffffe002459b9b0
dofilewrite() at dofilewrite+0xb0/frame 0xfffffe002459ba00
kern_writev() at kern_writev+0x63/frame 0xfffffe002459ba40
sys_write() at sys_write+0xd1/frame 0xfffffe002459bab0
amd64_syscall() at amd64_syscall+0x499/frame 0xfffffe002459bbf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe002459bbf0
--- syscall (4, FreeBSD ELF64, sys_write), rip = 0x483bda, rsp = 0x7fffdfffdef8, rbp = 0x7fffdfffdf30 ---
KDB: enter: panic
[ thread pid 5525 tid 100829 ]
Stopped at      kdb_enter+0x67: movq    $0,0x145f996(%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         0xfffffe002b200000
rdx                    0x3ffff
rbx                          0
rsp         0xfffffe002459b360
rbp         0xfffffe002459b380
rsi                    0x40001
rdi         0xffffffff810c14f1  vprintf+0xe1
r8                           0
r9                  0xffffffff
r10                          0
r11         0xfffff8003afe0bd0
r12         0xffffffff82068d90  ddb_dbbe
r13                          0
r14         0xffffffff81937d2c
r15         0xffffffff81937d2c
rip         0xffffffff810b6777  kdb_enter+0x67
rflags                    0x86  ll+0x65
kdb_enter+0x67: movq    $0,0x145f996(%rip)
db> show proc
Process 5525 (syz-executor.3) at 0xfffff8003abf1000:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 777 at 0xfffff8003abf0a60
 ABI: FreeBSD ELF64
 arguments: /root/syz-executor.3
 reaper: 0xfffff800032be530 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffff8003acc6000
   (map 0xfffff8003acc6000)
   (map.pmap 0xfffff8003acc60c0)
   (pmap 0xfffff8003acc6120)
 threads: 2
100171                   RunQ                                syz-executor.3
100829                   Run     CPU 0                       syz-executor.3
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 5526   768   768     0  R                                   syz-executor.0
 5525   777   777     0  R       (threaded)                  syz-executor.3
100171                   RunQ                                syz-executor.3
100829                   Run     CPU 0                       syz-executor.3
 5524   773   773     0  R       (threaded)                  syz-executor.2
100085                   RunQ                                syz-executor.2
100826                   S       uwait   0xfffff800039d8180  syz-executor.2
 5523   769   769     0  R       (threaded)                  syz-executor.1
100794                   Run     CPU 1                       syz-executor.1
100828                   S       uwait   0xfffff80003785380  syz-executor.1
 2485  2479  2485     0  Ss      select  0xfffff80003546ec0  dhclient
 2482     1  2482     0  Ss      select  0xfffff800039f4dc0  dhclient
 2479  2472   422    65  S       select  0xfffff800039f4f40  dhclient
 2472   422   422     0  S       wait    0xfffff8003a679000  sh
  777   766   777     0  Ss      nanslp  0xffffffff824fed11  syz-executor.3
  773   766   773     0  Ss      nanslp  0xffffffff824fed11  syz-executor.2
  769   766   769     0  Ss      nanslp  0xffffffff824fed10  syz-executor.1
  768   766   768     0  Ss      nanslp  0xffffffff824fed10  syz-executor.0
  766   764   764     0  S       (threaded)                  syz-fuzzer
100071                   S       uwait   0xfffff80003783000  syz-fuzzer
100106                   S       uwait   0xfffff800039d8500  syz-fuzzer
100107                   S       uwait   0xfffff800039d7c00  syz-fuzzer
100108                   S       uwait   0xfffff800039d7d00  syz-fuzzer
100109                   S       uwait   0xfffff80003451600  syz-fuzzer
100110                   S       uwait   0xfffff80003451700  syz-fuzzer
100111                   S       uwait   0xfffff800039da300  syz-fuzzer
100112                   S       uwait   0xfffff800039d8700  syz-fuzzer
100113                   S       uwait   0xfffff8003aa90280  syz-fuzzer
100115                   S       uwait   0xfffff800039d7f00  syz-fuzzer
100116                   S       kqread  0xfffff80003d82b00  syz-fuzzer
  764   762   764     0  Ss      pause   0xfffff8003a6485d8  csh
  762   680   762     0  Ss      select  0xfffff80003547540  sshd
  746     1   746     0  Ss+     ttyin   0xfffff800033b8cb0  getty
  745     1   745     0  Ss+     ttyin   0xfffff80003abb8b0  getty
  744     1   744     0  Ss+     ttyin   0xfffff80003abbcb0  getty
  743     1   743     0  Ss+     ttyin   0xfffff80003abc0b0  getty
  742     1   742     0  Ss+     ttyin   0xfffff80003abc4b0  getty
  741     1   741     0  Ss+     ttyin   0xfffff80003abc8b0  getty
  740     1   740     0  Ss+     ttyin   0xfffff80003abccb0  getty
  739     1   739     0  Ss+     ttyin   0xfffff80003abd0b0  getty
  738     1   738     0  Ss+     ttyin   0xfffff80003abd4b0  getty
  684     1   684     0  Ss      nanslp  0xffffffff824fed10  cron
  680     1   680     0  Ss      select  0xfffff8000352e6c0  sshd
  493     1   493     0  Ss      select  0xfffff8000352ea40  syslogd
  422     1   422     0  Ss      wait    0xfffff80003a7f530  devd
  421     1   421    65  Ss      select  0xfffff800039f57c0  dhclient
  336     1   336     0  Ss      select  0xfffff8000352e9c0  dhclient
  333     1   333     0  Ss      select  0xfffff800039f5840  dhclient
   21     0     0     0  DL      syncer  0xffffffff825d51e0  [syncer]
   20     0     0     0  DL      vlruwt  0xfffff80003a84000  [vnlru]
   19     0     0     0  DL      (threaded)                  [bufdaemon]
100065                   D       qsleep  0xffffffff825d4698  [bufdaemon]
100066                   D       -       0xffffffff8200a980  [bufspacedaemon-0]
100080                   D       sdflush 0xfffff8000377c4e8  [/ worker]
   18     0     0     0  DL      psleep  0xffffffff825f0108  [vmdaemon]
   17     0     0     0  DL      (threaded)                  [pagedaemon]
100063                   D       psleep  0xffffffff8261d058  [dom0]
100069                   D       launds  0xffffffff8261d064  [laundry: dom0]
100070                   D       umarcl  0xffffffff8153f000  [uma]
   16     0     0     0  DL      -       0xffffffff82359598  [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       -       0xffffffff82234940  [doneq0]
100062                   D       -       0xffffffff82234808  [scanner]
    4     0     0     0  DL      crypto_ 0xfffff80003398e90  [crypto returns 1]
    3     0     0     0  DL      crypto_ 0xfffff80003398e30  [crypto returns 0]
    2     0     0     0  DL      crypto_ 0xffffffff825ea178  [crypto]
   14     0     0     0  DL      seqstat 0xfffff80003333c88  [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]
100005                   I                                   [swi5: fast taskq]
100009                   I                                   [swi6: task queue]
100010                   I                                   [swi6: Giant taskq]
100017                   I                                   [swi3: vm]
100018                   I                                   [swi1: netisr 0]
100019                   I                                   [swi4: clock (0)]
100020                   I                                   [swi4: clock (1)]
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    0xfffff800032be530  [init]
   10     0     0     0  DL      audit_w 0xffffffff826632b0  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff82609c78  [swapper]
100006                   D       -       0xfffff800031db700  [config_0]
100007                   D       -       0xfffff800031db500  [kqueue_ctx taskq]
100008                   D       -       0xfffff800031db300  [aiod_kick taskq]
100011                   D       -       0xfffff800031dac00  [thread taskq]
100012                   D       -       0xfffff800031daa00  [if_config_tqg_0]
100013                   D       -       0xfffff800031da800  [softirq_0]
100014                   D       -       0xfffff800031da600  [softirq_1]
100015                   D       -       0xfffff800031da400  [if_io_tqg_0]
100016                   D       -       0xfffff800031da200  [if_io_tqg_1]
100021                   D       -       0xfffff800031d9b00  [firmware taskq]
100026                   D       -       0xfffff800031d9500  [crypto_0]
100027                   D       -       0xfffff800031d9500  [crypto_1]
100041                   D       -       0xfffff800031d8800  [vtnet0 rxq 0]
100042                   D       -       0xfffff800031d8700  [vtnet0 txq 0]
100043                   D       -       0xfffff800031d8600  [vtnet0 rxq 1]
100044                   D       -       0xfffff800031d8500  [vtnet0 txq 1]
100046                   D       vtbslp  0xfffff80003549800  [virtio_balloon]
100050                   D       -       0xfffff8000378b700  [mca taskq]
100055                   D       -       0xffffffff81cdb6f1  [deadlkres]
100057                   D       -       0xfffff800039e1000  [acpi_task_0]
100058                   D       -       0xfffff800039e1000  [acpi_task_1]
100059                   D       -       0xfffff800039e1000  [acpi_task_2]
100061                   D       -       0xfffff800031d8e00  [CAM taskq]
db> show all locks
Process 5525 (syz-executor.3) thread 0xfffff8003afe06e0 (100829)
exclusive sleep mutex igmp_mtx (igmp_mtx) r = 0 (0xffffffff826623c8) locked @ /syzkaller/managers/main/kernel/sys/netinet/igmp.c:812
exclusive sleep mutex in_multi_list_mtx (in_multi_list_mtx) r = 0 (0xffffffff826621f0) locked @ /syzkaller/managers/main/kernel/sys/netinet/igmp.c:811
db> show malloc
              Type        InUse        MemUse     Requests
            devbuf         4213         4851K         4241
             vtbuf           24         1968K           46
         sysctloid        23668         1374K        23732
              kobj          333         1332K          489
            newblk          543         1160K         5230
          vfscache            4         1025K            4
          inodedep          518          771K         4729
               pcb           23          537K         4252
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          388K            4
           subproc          135          253K         5609
            acpica         1674          185K        49997
         vnet_data            1          168K            1
          filedesc           21          149K         9311
           pagedep           15          132K         4652
        tfo_ccache            1          128K            1
               sem            4          106K            4
            DEVFS1          105          105K          122
            linker          221           89K          252
               bus          992           79K         3333
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
          freefile          506           64K         4654
            dirrem          505           64K         4656
            module          495           62K          495
              umtx          312           39K          312
               BPF           22           36K           22
        gtaskqueue           22           34K           22
           kdtrace          169           33K        15919
         hostcache            1           32K            1
               shm            1           32K          252
            DEVFS3          124           31K          134
               msg            4           30K            4
        DEVFS_RULE           56           27K           56
            ifaddr           71           24K           73
            kbdmux            6           22K            6
              vmem            3           19K            4
           lltable           47           18K           47
              temp           34           17K         2633
         ufs_mount            3           17K            4
              proc            3           17K            3
               tty           16           16K           16
           tidhash            1           16K            1
           ithread           89           15K           89
       ether_multi          177           15K          767
            KTRACE          100           13K          100
             ifnet            7           13K            7
              kenv           95           12K           99
         in6_multi           89           11K           89
      eventhandler          122           11K          122
         pfs_nodes           20           10K           20
              GEOM           60           10K          487
              rman           82           10K          423
         bmsafemap            2            9K         4691
           devstat            4            9K            4
              UART           12            9K           12
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
              cred           30            8K          721
     audit_evclass          231            8K          289
          routetbl           58            7K           62
           CAM DEV            3            6K          508
            kqueue           55            6K         5533
                vt           11            6K           11
            plimit           21            6K          357
            sglist            5            6K            5
          freework           21            6K         4647
         CAM queue            5            6K         1522
          freeblks           20            5K         4646
       ufs_dirhash           24            5K           24
            DEVFSP           72            5K           76
         taskqueue           42            5K           42
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
          kcovinfo           64            4K           68
               UMA          233            4K          233
             hhook           13            4K           13
           session           25            4K           38
              pgrp           25            4K           38
            select           24            3K           24
           acpisem           22            3K           22
          terminal           11            3K           11
         proc-args           44            3K          572
           uidinfo            4            3K            4
          sctp_ifa           17            3K           17
        local_apic            1            2K            1
           io_apic            1            2K            1
             mkdir           16            2K         9282
            diradd           16            2K         4689
         ipsec-saq            2            2K            2
             lockf           19            2K           29
            ip6ndp           12            2K           22
          in_multi            7            2K          125
            Unitno           31            2K         7603
           CAM XPT           22            2K          541
           acpidev           20            2K           20
            crypto            2            2K            2
               msi            9            2K            9
               tun            7            2K            7
       ipsecpolicy            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             clone            8            1K            8
      NFSD session            1            1K            1
        CAM periph            4            1K          270
         newdirblk           12            1K         4641
               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
             epoch            5            1K            5
           CAM SIM            2            1K            2
           softdep            1            1K            1
          indirdep            2            1K           10
    chacha20random            1            1K            1
              cdev            2            1K            2
 encap_export_host            8            1K            8
              pfil            3            1K            3
       inpcbpolicy           11            1K         6429
               osd            3            1K            9
            vnodes            1            1K            1
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            feeder            7            1K            7
        loginclass            3            1K            3
          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
            soname            4            1K         7088
          nexusdev            5            1K            5
           entropy            2            1K           38
           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
          filecaps            2            1K           90
          p1003.1b            1            1K            1
           CAM CCB            0            0K         2044
        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         1648
          sentinel            0            0K            0
            jfsync            0            0K            0
            jtrunc            0            0K            0
             sbdep            0            0K            5
           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            7
        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         1031
       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         2108
         sctp_iter            0            0K            5
         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
         sctp_athm            0            0K         1937
         sctp_atky            0            0K         2591
         sctp_atcl            0            0K         1937
         sctp_a_it            0            0K            5
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          sctp_map            0            0K            0
      newreno data            0            0K            0
        ip_msource            0            0K            0
       ip_moptions            0            0K          638
        in_mfilter            0            0K          144
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      80211ratectl            0            0K            0
        80211power            0            0K            0
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            statfs            0            0K         4817
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               iov            0            0K        15948
          ioctlops            0            0K         3309
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              SWAP            0            0K            0
               LED            0            0K            0
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       SIIS driver            0            0K            0
db> show ktr
No such command; use "help" to list available commands

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-freebsd-main 2019/12/31 22:15 freebsd 08fb04a272bf 25a0186e console log report
* Struck through repros no longer work on HEAD.