syzbot


panic: ifa_update_broadaddr does not support dynamicW lAeRnNgIthNG

Status: closed as dup on 2019/09/14 06:59
Reported-by: syzbot+bc8ed4d6c1eeffa1915f@syzkaller.appspotmail.com
First crash: 1685d, last: 1685d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
panic: ifa_update_broadaddr does not support dynamic length syz 6780 1630d 1688d

Sample crash report:
login: panic: ifa_update_broadaddr does not support dynamicW lAeRnNgIthNG
:
 SStPoL pNpOeTd  aLOtWERED ON SYSCALL 3 4 EX I T   0   9d
b
_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*457939  48186      0           0  0x4000000    0  syz-executor.1
 475099  43690     74    0x100012          0    1  pflogd
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
ifa_update_broadaddr(ffff800000ad3800,ffff800000acdb00,ffff800022ba5050) at ifa_update_broadaddr+0x61 sys/net/if.c:2970
in_ioctl(80206913,ffff800022ba5040,ffff800000ad3800,1) at in_ioctl+0x463 sys/netinet/in.c:299
ifioctl(fffffd8065f82198,80206913,ffff800022ba5040,ffff800020acea08) at ifioctl+0xb64 sys/net/if.c:2202
sys_ioctl(ffff800020acea08,ffff800022ba5158,ffff800022ba51a0) at sys_ioctl+0x5b9
syscall(ffff800022ba5220) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800022ba5220) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,981653d2010) at Xsyscall+0x128
end of kernel
end trace frame: 0x983ca7b5190, count: 7
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
ifa_update_broadaddr does not support dynamic length
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
ifa_update_broadaddr(ffff800000ad3800,ffff800000acdb00,ffff800022ba5050) at ifa_update_broadaddr+0x61 sys/net/if.c:2970
in_ioctl(80206913,ffff800022ba5040,ffff800000ad3800,1) at in_ioctl+0x463 sys/netinet/in.c:299
ifioctl(fffffd8065f82198,80206913,ffff800022ba5040,ffff800020acea08) at ifioctl+0xb64 sys/net/if.c:2202
sys_ioctl(ffff800020acea08,ffff800022ba5158,ffff800022ba51a0) at sys_ioctl+0x5b9
syscall(ffff800022ba5220) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
syscall(ffff800022ba5220) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,ffffffffffffff36,0,3,981653d2010) at Xsyscall+0x128
end of kernel
end trace frame: 0x983ca7b5190, count: -8
ddb{0}> show registers
rdi               0xffffffff81d5a187    db_enter+0x17
rsi                           0x1932    __ALIGN_SIZE+0x932
rbp               0xffff800022ba4de0
rbx               0xffff800022ba4e90
rdx                           0x1933    __ALIGN_SIZE+0x933
rcx               0xffff800021ba0000
rax               0xffff800021ba0000
r8                0xffffffff819b63bf    kprintf+0x16f
r9                               0x1
r10                             0x25
r11               0x5fe3ddf670b6b1ca
r12                     0x3000000008
r13               0xffff800022ba4df0
r14                            0x100
r15                              0x1
rip               0xffffffff81d5a188    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff800022ba4dd0
ss                              0x10
db_enter+0x18:  addq    $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.1) pid=457939 stat=onproc
    flags process=0 proc=4000000<THREAD>
    pri=86, usrpri=86, nice=20
    forw=0xffffffffffffffff, list=0xffff800020acec80,0xffffffff8265d560
    process=0xffff800020adce00 user=0xffff800022ba0000, vmspace=0xfffffd807f00bcf0
    estcpu=36, cpticks=1, pctcpu=0.0
    user=0, sys=1, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 48186  394134  71772      0  2           0                syz-executor.1
*48186  457939  71772      0  7   0x4000000                syz-executor.1
 71772  131067  28920      0  3        0x82  nanosleep     syz-executor.1
 46579     106      1      0  3    0x100083  ttyin         getty
 49220  111928  28920      0  3        0x82  nanosleep     syz-executor.0
 85361  137014      0      0  3     0x14200  bored         sosplice
 28920  240689  36124      0  3        0x82  thrsleep      syz-fuzzer
 28920   42312  36124      0  3   0x4000082  nanosleep     syz-fuzzer
 28920  267384  36124      0  3   0x4000082  thrsleep      syz-fuzzer
 28920  506738  36124      0  3   0x4000082  kqread        syz-fuzzer
 28920   17223  36124      0  3   0x4000082  thrsleep      syz-fuzzer
 28920   47326  36124      0  3   0x4000082  thrsleep      syz-fuzzer
 28920  447777  36124      0  3   0x4000082  thrsleep      syz-fuzzer
 28920  144573  36124      0  3   0x4000082  thrsleep      syz-fuzzer
 28920  162846  36124      0  3   0x4000082  thrsleep      syz-fuzzer
 28920  465908  36124      0  3   0x4000082  thrsleep      syz-fuzzer
 36124  244339  83490      0  3    0x10008a  pause         ksh
 83490  522441  33418      0  3        0x92  select        sshd
 33418   91154      1      0  3        0x80  select        sshd
 43690  475099  34530     74  7    0x100012                pflogd
 34530  280456      1      0  3        0x80  netio         pflogd
 42802  167689  42071     73  3    0x100090  kqread        syslogd
 42071  452602      1      0  3    0x100082  netio         syslogd
 47462  238603      1     77  3    0x100090  poll          dhclient
   681  451571      1      0  3        0x80  poll          dhclient
  4971  493464      0      0  3     0x14200  pgzero        zerothread
 58717  264556      0      0  3     0x14200  aiodoned      aiodoned
 19575   59119      0      0  3     0x14200  syncer        update
 48739  459787      0      0  3     0x14200  cleaner       cleaner
 66395  317953      0      0  3     0x14200  reaper        reaper
  2014    3903      0      0  3     0x14200  pgdaemon      pagedaemon
 14768  386123      0      0  3     0x14200  bored         crynlk
 53151   54763      0      0  3     0x14200  bored         crypto
 86912  118175      0      0  3  0x40014200  acpi0         acpi0
 43773  308404      0      0  3  0x40014200                idle1
 31277  216136      0      0  3     0x14200  bored         softnet
 80874  154513      0      0  3     0x14200  bored         systqmp
 75936   23339      0      0  3     0x14200  bored         systq
 26123  465607      0      0  2  0x40014200                softclock
 80462  104512      0      0  3  0x40014200                idle0
 85396  157316      0      0  3     0x14200  bored         smr
     1  116333      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
Process 48186 (syz-executor.1) thread 0xffff800020acea08 (457939)
exclusive rwlock netlock r = 0 (0xffffffff82489128)
#0  witness_lock+0x52e sys/kern/subr_witness.c:1163
#1  in_ioctl+0x142
#2  ifioctl+0xb64 sys/net/if.c:2202
#3  sys_ioctl+0x5b9
#4  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#4  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#5  Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82672ed0)
#0  witness_lock+0x52e sys/kern/subr_witness.c:1163
#1  syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline]
#1  syscall+0x400 sys/arch/amd64/amd64/trap.c:555
#2  Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim Kern Lim
         devbuf  9569   6573K    7932K  78643K     15576        0        0
            pcb    13     10K      12K  78643K       213        0        0
         rtable   123      5K       5K  78643K       760        0        0
         ifaddr    74     15K      16K  78643K       265        0        0
       counters    39     33K      33K  78643K        39        0        0
       ioctlops     0      0K       4K  78643K      1511        0        0
            iov     0      0K      18K  78643K       191        0        0
          mount     1      1K       1K  78643K         1        0        0
         vnodes  1229     77K      77K  78643K      3127        0        0
      UFS quota     1     32K      32K  78643K         1        0        0
      UFS mount     5     36K      36K  78643K         5        0        0
            shm     2      1K       5K  78643K        25        0        0
         VM map     2      1K       1K  78643K         4        0        0
            sem    12      0K       1K  78643K       231        0        0
        dirhash    12      2K       2K  78643K        12        0        0
           ACPI  1808    196K     290K  78643K     12765        0        0
      file desc     5     13K      25K  78643K      1627        0        0
          sigio     0      0K       0K  78643K        16        0        0
           proc    62     63K      95K  78643K       845        0        0
        subproc    32      2K       2K  78643K       119        0        0
    NFS srvsock     1      0K       0K  78643K         1        0        0
     NFS daemon     1     16K      16K  78643K         1        0        0
    ip_moptions     0      0K       0K  78643K       168        0        0
       in_multi    33      2K       2K  78643K       108        0        0
    ether_multi     1      0K       0K  78643K         3        0        0
            mrt     0      0K       0K  78643K         2        0        0
    ISOFS mount     1     32K      32K  78643K         1        0        0
  MSDOSFS mount     1     16K      16K  78643K         1        0        0
           ttys    96    424K     424K  78643K        96        0        0
           exec     0      0K       1K  78643K       402        0        0
        pagedep     1      8K       8K  78643K         1        0        0
       inodedep     1     32K      32K  78643K         1        0        0
         newblk     1      0K       0K  78643K         1        0        0
        VM swap     7     26K      26K  78643K         7        0        0
       UVM amap   117     22K      31K  78643K      6482        0        0
       UVM aobj    75      3K       3K  78643K        79        0        0
        memdesc     1      4K       4K  78643K         1        0        0
    crypto data     1      1K       1K  78643K         1        0        0
    ip6_options     0      0K       0K  78643K       213        0        0
            NDP    16      0K       0K  78643K        75        0        0
           temp   199   3552K    3629K  78643K     15423        0        0
         kqueue     0      0K       0K  78643K         9        0        0
      SYN cache     2     16K      16K  78643K         2        0        0
ddb{0}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp         64       26    0       18     1     0     1     1     0     8    0
plcache    128       20    0        0     1     0     1     1     0     8    0
rtpcb       80      101    0       99     1     0     1     1     0     8    0
rtentry    112      110    0       62     2     0     2     2     0     8    0
unpcb      120      760    0      749     2     1     1     2     0     8    0
syncache   264        4    0        4     1     1     0     1     0     8    0
tcpqe       32     6390    0     6390     2     2     0     2     0     8    0
tcpcb      544      367    0      363     1     0     1     1     0     8    0
inpcb      280     1897    0     1888    15    13     2    13     0     8    1
nd6         48       12    0        8     1     0     1     1     0     8    0
pkpcb       40        7    0        7     4     4     0     1     0     8    0
ppxss      1128      35    0       35     4     3     1     1     0     8    1
pffrag     232        2    0        2     1     1     0     1     0   482    0
pffrnode    88        2    0        2     1     1     0     1     0     8    0
pffrent     40        6    0        6     1     1     0     1     0     8    0
pfosfp      40      846    0      423     5     0     5     5     0     8    0
pfosfpen   112     1428    0      714    21     0    21    21     0     8    0
pfstitem    24       57    0       33     1     0     1     1     0     8    0
pfstkey    112       57    0       33     1     0     1     1     0     8    0
pfstate    328       57    0       33     3     0     3     3     0     8    0
pfrule     1360      21    0       16     2     1     1     2     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      455    0      227    19     4    15    15     0     8    0
art_table   32      456    0      227     2     0     2     2     0     8    0
art_node    16      108    0       64     1     0     1     1     0     8    0
sysvmsgpl   40       13    0        9     2     1     1     1     0     8    0
semapl     112      229    0      219     1     0     1     1     0     8    0
shmpl      112       77    0        4     3     0     3     3     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino1pl    128     4182    0     2778    46     0    46    46     0     8    0
ffsino     272     4182    0     2778    95     0    95    95     0     8    0
nchpl      144     7210    0     5586    61     0    61    61     0     8    0
uvmvnodes   72     5456    0        0   100     0   100   100     0     8    0
vnodes     208     5456    0        0   288     0   288   288     0     8    0
namei      1024   27252    0    27252     2     1     1     1     0     8    1
percpumem   16       30    0        0     1     0     1     1     0     8    0
vmpool     552        2    0        2     1     1     0     1     0     8    0
scsiplug    64        2    0        2     1     1     0     1     0     8    0
scxspl     192    18691    0    18691    19    18     1     7     0     8    1
plimitpl   152      169    0      161     1     0     1     1     0     8    0
sigapl     432     1814    0     1799     3     1     2     3     0     8    0
futexpl     56    30544    0    30544     1     0     1     1     0     8    1
knotepl    112      408    0      389     2     1     1     2     0     8    0
kqueuepl   104      359    0      357     1     0     1     1     0     8    0
pipepl     112     1114    0     1095     5     3     2     2     0     8    1
fdescpl    488     1815    0     1799     3     0     3     3     0     8    0
filepl     152    17921    0    17820    18    11     7    13     0     8    3
lockfpl    104      494    0      493     1     0     1     1     0     8    0
lockfspl    48      191    0      190     1     0     1     1     0     8    0
sessionpl  112       25    0       14     1     0     1     1     0     8    0
pgrppl      48       41    0       30     1     0     1     1     0     8    0
ucredpl     96     5830    0     5821     1     0     1     1     0     8    0
zombiepl   144     1799    0     1798     2     1     1     1     0     8    0
processpl  896     1831    0     1798     4     0     4     4     0     8    0
procpl     632     5456    0     5413     6     1     5     5     0     8    0
srpgc       64       10    0       10     3     3     0     1     0     8    0
sosppl     128       25    0       25     4     3     1     1     0     8    1
sockpl     384     2797    0     2776    25    20     5    21     0     8    2
mcl64k     65536      8    0        0     1     0     1     1     0     8    0
mcl16k     16384      2    0        0     1     0     1     1     0     8    0
mcl12k     12288     10    0        0     1     0     1     1     0     8    0
mcl9k      9216      14    0        0     1     0     1     1     0     8    0
mcl8k      8192       9    0        0     2     0     2     2     0     8    0
mcl4k      4096       9    0        0     2     0     2     2     0     8    0
mcl2k2     2112       5    0        0     1     0     1     1     0     8    0
mcl2k      2048     213    0        0    24     0    24    24     0     8    0
mtagpl      80       51    0        0     1     0     1     1     0     8    0
mbufpl     256      311    0        0    14     0    14    14     0     8    0
bufpl      256    10679    0     3631   441     0   441   441     0     8    0
anonpl      16   170331    0   158563    85    21    64    72     0   124    2
amapchunkpl 152   11063    0    10927    26    15    11    11     0   158    3
amappl16   192     7862    0     7058    53    12    41    52     0     8    0
amappl15   184      337    0      336     1     0     1     1     0     8    0
amappl14   176      639    0      634     1     0     1     1     0     8    0
amappl13   168        1    0        0     1     0     1     1     0     8    0
amappl12   160       10    0        9     2     1     1     1     0     8    0
amappl11   152       66    0       51     1     0     1     1     0     8    0
amappl10   144      270    0      266     1     0     1     1     0     8    0
amappl9    136     1204    0     1198     1     0     1     1     0     8    0
amappl8    128      769    0      738     4     2     2     2     0     8    0
amappl7    120      321    0      315     1     0     1     1     0     8    0
amappl6    112       86    0       74     1     0     1     1     0     8    0
amappl5    104      175    0      161     1     0     1     1     0     8    0
amappl4     96     1672    0     1639     2     1     1     2     0     8    0
amappl3     88     1025    0     1017     1     0     1     1     0     8    0
amappl2     80    13518    0    13444     3     1     2     3     0     8    0
amappl1     72    49033    0    48594    26    16    10    20     0     8    0
amappl      80     5791    0     5747     2     0     2     2     0    84    0
dma4096    4096       1    0        1     1     1     0     1     0     8    0
dma256     256        6    0        6     1     1     0     1     0     8    0
dma64       64      259    0      259     1     1     0     1     0     8    0
dma32       32        7    0        7     1     1     0     1     0     8    0
dma16       16       17    0       17     1     1     0     1     0     8    0
aobjpl      64       78    0        4     2     0     2     2     0     8    0
uaddrrnd    24     1817    0     1799     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     1817    0     1799     1     0     1     1     0     8    0
vmmpekpl   168    17468    0    17435     2     0     2     2     0     8    0
vmmpepl    168   226908    0   224955   188    72   116   116     0   357   25
vmsppl     368     1814    0     1799     2     0     2     2     0     8    0
pdppl      4096    3641    0     3602     7     1     6     6     0     8    0
pvpl        32   504106    0   489159   222    57   165   174     0   265   16
pmappl     232     1816    0     1801     3     2     1     2     0     8    0
extentpl    40       41    0       26     1     0     1     1     0     8    0
phpool     112      619    0        9    18     0    18    18     0     8    0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/14 00:28 openbsd 33d1bf81aaf6 32d59357 .config console log report ci-openbsd-multicore
* Struck through repros no longer work on HEAD.