syzbot


panic: in_pcblookup_hash_l[o ctkherde:a di nvaplidi d 1l1o86 catlid a1d0dr0e6s9s1 ]

Status: fixed on 2023/03/07 10:19
Reported-by: syzbot+9ca890fb84e984e82df2@syzkaller.appspotmail.com
Fix commit: 713264f6b8bc netinet: Tighten checks for unspecified source addresses
First crash: 640d, last: 640d

Sample crash report:
panic: in_pcblookup_hash_l[o ctkherde:a di nvaplidi d 1l1o86 catlid  a1d0dr0e6s9s1 ]
cp
Suitdo p=p ed0 at
time = 1677094017
KDB: stack backtrace:
      trace_pc+0x36db_trace_self_wrapper() at :       cmpl       $0 x 3  , %  edcxb_t
rdbac>e  _self_wrapper+0xc7/frame 0xfffffe00994df310

db> kdb_backtrace() at kdb_backtrace+0xd1/frame 0xfffffe00994df470
vpanic() at vpanic+0x254/frame 0xfffffe00994df550
panic() at panic+0xb5/frame 0xfffffe00994df610
in_pcblookup_hash_locked() at in_pcblookup_hash_locked+0xf32/frame 0xfffffe00994df750
in_pcb_lport_dest() at in_pcb_lport_dest+0x476/frame 0xfffffe00994df810
in_pcbconnect_setup() at in_pcbconnect_setup+0x7e5/frame 0xfffffe00994df970
in_pcbconnect() at in_pcbconnect+0x174/frame 0xfffffe00994dfa80
tcp_connect() at tcp_connect+0xf0/frame 0xfffffe00994dfad0
tcp_usr_connect() at tcp_usr_connect+0x244/frame 0xfffffe00994dfbb0
soconnectat() at soconnectat+0x1b9/frame 0xfffffe00994dfc10
kern_connectat() at kern_connectat+0x2cc/frame 0xfffffe00994dfcf0
sys_connect() at sys_connect+0xfb/frame 0xfffffe00994dfd30
ia32_syscall() at ia32_syscall+0x41a/frame 0xfffffe00994dff30
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xfbffcf78
set $lines = 0set $maxwidth = 0[ thread pid 1186 tid 100691 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x25823fa(%rip)
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                           0
rax                       0x12
rcx         0xfffffe0094693000
rdx                    0x3ffff
rbx                          0
rsp         0xfffffe00994dedd0
rbp         0xfffffe00994dedf0
rsi                    0x40001
rdi         0xffffffff8171fa68  printf+0x158
r8                           0
r9                  0xffffffff
r10         0x1cd94a23baeb0891
r11                 0x2b6c3cd3
r12                        0x1
r13         0xfffffe0092b6a560
r14         0xffffffff82ae6760  .str.26
r15         0xffffffff82ae6760  .str.26
rip         0xffffffff8170f89b  kdb_enter+0x6b
rflags                0x200046  kernload+0x46
kdb_enter+0x6b: movq    $0,0x25823fa(%rip)
db> show porc
P
rocess 1186 (syz-executor.1) at 0xfffffe008fe28570:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 777 at 0xfffffe0092663558
 ABI: FreeBSD ELF32
 flag: 0x10000080  flag2: 0
 arguments: /root/syz-executor.1 exec
 reaper: 0xfffffe00541d4010 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe00926e4a00
   (map 0xfffffe00926e4a00)
   (map.pmap 0xfffffe00926e4ac0)
   (pmap 0xfffffe00926e4b30)
 threads: 2
100126                   RunQ                                syz-executor.1
100691                   Run     CPU 0                       syz-executor.1
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 1186   777   777     0  R       (threaded)                  syz-executor.1
100126                   RunQ                                syz-executor.1
100691                   Run     CPU 0                       syz-executor.1
 1185   782   782     0  R       (threaded)                  syz-executor.3
100145                   RunQ                                syz-executor.3
100690                   S       uwait   0xfffffe008fe11c80  syz-executor.3
 1184   776   776     0  R       (threaded)                  syz-executor.0
100130                   RunQ                                syz-executor.0
100689                   S       uwait   0xfffffe008fe11e80  syz-executor.0
 1012  1004  1012     0  Ss      select  0xfffffe0007984d40  dhclient
 1008     1  1008     0  Ss      select  0xfffffe0058605f40  dhclient
 1004   993   430    65  S       select  0xfffffe0058606140  dhclient
  993   430   430     0  S       wait    0xfffffe0057992ac0  sh
  782   774   782     0  Ss      nanslp  0xffffffff83c5f401  syz-executor.3
  779   774   779     0  Rs                                  syz-executor.2
  777   774   777     0  Rs                                  syz-executor.1
  776   774   776     0  Rs                                  syz-executor.0
  774   772   772     0  R       (threaded)                  syz-fuzzer
100113                   S       uwait   0xfffffe005787af00  syz-fuzzer
100114                   RunQ                                syz-fuzzer
100115                   S       uwait   0xfffffe008fe13880  syz-fuzzer
100116                   S       wait    0xfffffe0092663ab0  syz-fuzzer
100117                   S       uwait   0xfffffe0057879d80  syz-fuzzer
100118                   S       wait    0xfffffe0092663ab0  syz-fuzzer
100119                   S       uwait   0xfffffe005787a000  syz-fuzzer
100120                   S       wait    0xfffffe0092663ab0  syz-fuzzer
100121                   S       wait    0xfffffe0092663ab0  syz-fuzzer
100124                   RunQ                                syz-fuzzer
100125                   S       uwait   0xfffffe005787a400  syz-fuzzer
100283                   S       uwait   0xfffffe008fe12600  syz-fuzzer
  772   770   772     0  Ss      pause   0xfffffe00926660c8  csh
  770   688   770     0  Ss      select  0xfffffe00586084c0  sshd
  754     1   754     0  Ss+     ttyin   0xfffffe00540620b0  getty
  753     1   753     0  Ss+     ttyin   0xfffffe0057a828b0  getty
  752     1   752     0  Ss+     ttyin   0xfffffe0057a82cb0  getty
  751     1   751     0  Ss+     ttyin   0xfffffe0057a830b0  getty
  750     1   750     0  Ss+     ttyin   0xfffffe0057a834b0  getty
  749     1   749     0  Ss+     ttyin   0xfffffe0057a838b0  getty
  748     1   748     0  Ss+     ttyin   0xfffffe0057a83cb0  getty
  747     1   747     0  Ss+     ttyin   0xfffffe0057a840b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe0057a844b0  getty
  744     1    18     0  S+      piperd  0xfffffe0058b6a000  logger
  743   742    18     0  S+      nanslp  0xffffffff83c5f401  sleep
  742     1    18     0  S+      wait    0xfffffe0092664008  sh
  692     1   692     0  Ss      nanslp  0xffffffff83c5f401  cron
  688     1   688     0  Ss      select  0xfffffe00079853c0  sshd
  501     1   501     0  Ss      select  0xfffffe00586080c0  syslogd
  430     1   430     0  Ss      wait    0xfffffe0057992010  devd
  429     1   429    65  Ss      select  0xfffffe0007985640  dhclient
  344     1   344     0  Ss      select  0xfffffe0058608440  dhclient
  341     1   341     0  Ss      select  0xfffffe0058607cc0  dhclient
   17     0     0     0  DL      syncer  0xffffffff83d848a0  [syncer]
   16     0     0     0  DL      vlruwt  0xfffffe0056fa1000  [vnlru]
   15     0     0     0  RL      (threaded)                  [bufdaemon]
100079                   RunQ                                [bufdaemon]
100082                   RunQ                                [bufspacedaemon-0]
100094                   RunQ                                [/ worker]
    9     0     0     0  DL      psleep  0xffffffff83dba740  [vmdaemon]
    8     0     0     0  RL      (threaded)                  [pagedaemon]
100077                   RunQ                                [dom0]
100080                   D       launds  0xffffffff83dae604  [laundry: dom0]
100081                   RunQ                                [uma]
    7     0     0     0  RL                                  [rand_harvestq]
    6     0     0     0  RL                                  [pf purge]
    5     0     0     0  DL      waiting 0xffffffff845caf80  [sctp_iterator]
    4     0     0     0  DL      (threaded)                  [cam]
100044                   D       -       0xffffffff838cb340  [doneq0]
100045                   D       -       0xffffffff838cb2c0  [async]
100076                   D       -       0xffffffff838cb140  [scanner]
   14     0     0     0  DL      seqstat 0xfffffe0056ef6c88  [sequencer 00]
    3     0     0     0  DL      (threaded)                  [crypto]
100040                   D       crypto_ 0xffffffff83da9d60  [crypto]
100041                   D       crypto_ 0xfffffe0007a89030  [crypto returns 0]
100042                   D       crypto_ 0xfffffe0007a89080  [crypto returns 1]
   13     0     0     0  DL      (threaded)                  [geom]
100035                   D       -       0xffffffff83c34860  [g_event]
100036                   D       -       0xffffffff83c34880  [g_up]
100037                   D       -       0xffffffff83c348a0  [g_down]
    2     0     0     0  RL      (threaded)                  [clock]
100030                   RunQ                                [clock (0)]
100031                   I                                   [clock (1)]
   12     0     0     0  RL      (threaded)                  [intr]
100010                   I                                   [swi5: fast taskq]
100013                   I                                   [swi6: task queue]
100018                   I                                   [swi6: Giant taskq]
100029                   I                                   [swi1: netisr 0]
100032                   RunQ                                [swi1: hpts]
100033                   I                                   [swi1: hpts]
100046                   I                                   [irq24: virtio_pci0]
100047                   I                                   [irq25: virtio_pci0]
100048                   I                                   [irq26: virtio_pci0]
100049                   I                                   [irq27: virtio_pci0]
100050                   I                                   [irq28: virtio_pci1]
100051                   I                                   [irq29: virtio_pci1]
100052                   I                                   [irq30: virtio_pci1]
100053                   I                                   [irq31: virtio_pci1]
100054                   I                                   [irq32: virtio_pci1]
100059                   I                                   [irq33: virtio_pci2]
100060                   I                                   [irq34: virtio_pci2]
100061                   I                                   [irq35: virtio_pci2]
100063                   I                                   [irq1: atkbd0]
100064                   I                                   [irq12: psm0]
100065                   I                                   [swi0: uart uart++]
100069                   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    0xfffffe00541d4010  [init]
   10     0     0     0  DL      audit_w 0xffffffff83daa8e0  [audit]
    0     0     0     0  RLs     (threaded)                  [kernel]
100000                   RunQ                                [swapper]
100005                   D       -       0xfffffe0054085000  [if_config_tqg_0]
100006                   D       -       0xfffffe0054084e00  [softirq_0]
100007                   D       -       0xfffffe0054084d00  [softirq_1]
100008                   D       -       0xfffffe0054084c00  [if_io_tqg_0]
100009                   D       -       0xfffffe0054084b00  [if_io_tqg_1]
100011                   D       -       0xfffffe000795f400  [kqueue_ctx taskq]
100012                   D       -       0xfffffe000795f300  [pci_hp taskq]
100014                   D       -       0xfffffe000795f100  [inm_free taskq]
100015                   D       -       0xfffffe000795f000  [aiod_kick taskq]
100016                   D       -       0xfffffe000795ee00  [in6m_free taskq]
100017                   D       -       0xfffffe000795ed00  [deferred_unmount ta]
100019                   D       -       0xfffffe000795eb00  [thread taskq]
100020                   D       -       0xfffffe000795ea00  [linuxkpi_irq_wq]
100021                   D       -       0xfffffe000795e900  [linuxkpi_short_wq_0]
100022                   D       -       0xfffffe000795e900  [linuxkpi_short_wq_1]
100023                   D       -       0xfffffe000795e900  [linuxkpi_short_wq_2]
100024                   D       -       0xfffffe000795e900  [linuxkpi_short_wq_3]
100025                   D       -       0xfffffe000795e800  [linuxkpi_long_wq_0]
100026                   D       -       0xfffffe000795e800  [linuxkpi_long_wq_1]
100027                   D       -       0xfffffe000795e800  [linuxkpi_long_wq_2]
100028                   D       -       0xfffffe000795e800  [linuxkpi_long_wq_3]
100034                   D       -       0xfffffe000795e500  [firmware taskq]
100038                   D       -       0xfffffe000795e400  [crypto_0]
100039                   D       -       0xfffffe000795e400  [crypto_1]
100055                   D       -       0xfffffe000795e200  [vtnet0 rxq 0]
100056                   D       -       0xfffffe000795e100  [vtnet0 txq 0]
100057                   D       -       0xfffffe000795e000  [vtnet0 rxq 1]
100058                   D       -       0xfffffe000795de00  [vtnet0 txq 1]
100062                   D       vtbslp  0xfffffe0007985800  [virtio_balloon]
100066                   D       -       0xffffffff82aeb6a1  [deadlkres]
100070                   D       -       0xfffffe000795f800  [mca taskq]
100071                   D       -       0xfffffe0057917200  [acpi_task_0]
100072                   D       -       0xfffffe0057917200  [acpi_task_1]
100073                   D       -       0xfffffe0057917200  [acpi_task_2]
100075                   D       -       0xfffffe000795e300  [CAM taskq]
db> show all locks
Process 1186 (syz-executor.1) thread 0xfffffe0092b6a560 (100691)
exclusive sleep mutex tcphash (tcphash) r = 0 (0xfffffe00079db7e0) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_usrreq.c:1404
exclusive rw tcpinp (tcpinp) r = 0 (0xfffffe0099814550) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_usrreq.c:474
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
          tcp_hpts            7         4801K            7
            devbuf         4216         4323K         4241
         sysctloid        34757         2048K        34828
             vtbuf           24         1968K           46
              kobj          330         1320K          493
            newblk          712         1202K         2068
          vfscache            3         1025K            3
               pcb          100          627K         1361
          inodedep          193          584K          426
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
              vmem            3          274K            6
           subproc          118          230K         1254
            acpica         1674          184K        58126
           tidhash            3          141K            3
           pagedep           19          133K          321
        tfo_ccache            1          128K            1
          IP reass            1          128K            1
            linker          324          127K          353
          filedesc           16          121K          617
         vnet_data            1          112K            1
            DEVFS1          109          109K          126
               sem            4          106K            4
               bus         1000           82K         5215
          mtx_pool            2           72K            2
     NFSD srvcache            3           68K            3
          syncache            1           68K            1
            module          513           65K          513
          acpitask            1           64K            1
       ddb_capture            1           64K            1
              umtx          352           44K          352
           kdtrace          198           40K         1879
         sctp_stro           38           38K          325
            dirrem          148           37K          353
              temp           35           37K         2056
               BPF           22           36K           22
            DEVFS3          128           32K          138
         hostcache            1           32K            1
               shm            1           32K            1
               msg            4           30K            4
         sctp_atcl           78           30K         1044
            kbdmux            6           28K            6
        gtaskqueue           18           26K           18
        DEVFS_RULE           56           20K           56
            ifaddr           67           19K           69
          freefile          146           19K          332
         ufs_mount            4           17K            5
              proc            3           17K            3
               tty           16           16K           16
          routetbl          130           16K          410
           ithread           97           16K           97
            bus-sc           34           15K         1682
           lltable           44           14K           44
      eventhandler          154           13K          154
            KTRACE          100           13K          100
             ifnet            7           13K            7
       ether_multi          152           13K          162
              kenv           95           12K           95
          freework           44           11K          765
              rman           88           11K          431
              GEOM           61           11K          481
         CAM queue            5           11K         1528
         in6_multi           65            9K           65
         bmsafemap            2            9K          410
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K            1
         sctp_timw           32            8K           32
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
         pfs_nodes           20            8K           20
     audit_evclass          237            8K          296
              cred           29            8K          204
         taskqueue           63            7K           63
            sglist            5            7K            5
           CAM DEV            3            6K          510
            plimit           22            6K          348
            kqueue           53            6K         1193
         sctp_atky          116            5K         1377
       ufs_dirhash           24            5K           24
               UMA          267            5K          267
          pf_ifnet           10            5K           19
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
            DEVFSP           63            4K           95
            diradd           29            4K          385
           acpisem           28            4K           28
             hhook           15            4K           17
          indirdep           13            4K          682
           session           26            4K           38
          kcovinfo           52            4K           52
           pwddesc           51            4K         1208
         proc-args           81            4K         2329
          terminal           11            3K           11
             mkdir           18            3K          620
             clone            9            3K            9
           uidinfo            3            3K            7
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
         ipsec-saq            2            2K            2
             lockf           19            2K           29
             selfd           31            2K        15114
         newdirblk           15            2K          310
            ip6ndp           12            2K           13
          freeblks            7            2K          380
            Unitno           31            2K           49
          sctp_ifa           13            2K           14
           CAM XPT           22            2K          543
               msi           12            2K           12
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
            select           10            2K           37
         sctp_athm           78            2K         1130
          sctp_map           76            2K          568
               tun            7            2K            7
      NFSD session            1            1K            1
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           10
        CAM periph            4            1K          271
             ipsec            3            1K            3
          sctp_ifn            6            1K           14
               mld            6            1K            6
              igmp            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           89
          pci_link           10            1K           10
            crypto            4            1K            4
            CC Mem            5            1K          231
 encap_export_host           12            1K           12
              pfil            4            1K            4
              cdev            2            1K            2
               osd            9            1K          243
       inpcbpolicy           13            1K          443
    chacha20random            1            1K            1
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            vnodes            1            1K            1
           CAM SIM            2            1K            2
          procdesc            2            1K           12
            feeder            7            1K            7
         cryptodev            3            1K           78
           tcpfunc            3            1K            3
        loginclass            3            1K            6
            prison            6            1K            6
       lkpikmalloc            5            1K            6
        aesni_data            2            1K            2
          nexusdev            8            1K            8
            apmdev            1            1K            1
          atkbddev            2            1K            2
     CAM dev queue            2            1K            2
           netlink            1            1K            1
 CAM I/O Scheduler            1            1K            1
          CAM path            4            1K         1034
            soname            5            1K         4483
          pmchooks            1            1K            1
          filecaps            5            1K           90
          sctp_vrf            1            1K            1
              vnet            1            1K            1
           entropy            2            1K           39
               pmc            1            1K            1
          acpiintr            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
            ipcomp            0            0K            0
               esp            0            0K            0
                ah            0            0K            0
           filemon            0            0K            0
            mqdata            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K          367
         sctp_iter            s0
  h   
 o  
   w 
0K     
 u   
  m 
11a
 
    
 No   ssuccthp_ m  vr  f                        0                           c0oK m ma  n d ;  u s e   "  he  lp "  t o   l  i st   a va  il  ab  le    co  m ma n  d s  
  d  b  0> 
         sctp_cpal            0            0K            0
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
         sctp_athi            0            0K            0
         sctp_a_it            0            0K           11
         sctp_aadr            0            0K            0
         sctp_stri            0            0K          204
            tcp_do            0            0K            0
           tcp_fsb            0            0K           72
  newnfsclient_req            0            0K            0
        madt_table            0            0K            2
          smartpqi            0            0K            0
   NFSCL layrecall            0            0K            0
     NFSCL session            0            0K            0
     NFSCL sockreq            0            0K            0
               ixl            0            0K            0
     NFSCL devinfo            0            0K            0
     NFSCL flayout            0            0K            0
      NFSCL layout            0            0K            0
     NFSD rollback            0            0K            0
      NFSCL diroff            0            0K            0
       NEWdirectio            0            0K            0
        NEWNFSnode            0            0K            0
        ice-resmgr            0            0K            0
         ice-osdep            0            0K            0
               ice            0            0K            0
              iavf            0            0K            0
             axgbe            0            0K            0
         NFSCL lck            0            0K            0
      NFSCL lckown            0            0K            0
      NFSCL client            0            0K            0
       NFSCL deleg            0            0K            0
        NFSCL open            0            0K            0
       NFSCL owner            0            0K            0
            NFS fh            0            0K            0
           NFS req            0            0K            0
     NFSD usrgroup            0            0K            0
       NFSD string            0            0K            0
          xen_intr            0            0K            0
       NFSD V4lock            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            bounce            0            0K            0
            busdma            0            0K            0
            qpidrv            0            0K            0
      NFSD V4state            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
       msdosfs_fat            0            0K            0
     msdosfs_mount            0            0K            0
              isci            0            0K            0
      iommu_dmamap            0            0K            0
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Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/22 19:27 freebsd-src d0991948182a 00f8fc94 console log report ci-freebsd-i386 panic: in_pcblookup_hash_l[o ctkherde:a di nvaplidi d 1l1o86 catlid a1d0dr0e6s9s1 ]
* Struck through repros no longer work on HEAD.