syzbot


panic: kernel diagnostic assertion "rt->rt_ifa->ifa_ifp != NULL" failed: fWAiRlNeI NG":/ sSyPzLka NlOlTe rL/OmWaEnRaEgDe

Status: closed as dup on 2019/10/20 20:19
Reported-by: syzbot+f727775b71b2e7b8f51c@syzkaller.appspotmail.com
First crash: 1027d, last: 1027d
Duplicate of (1):
Title Repro Cause bisect Fix bisect Count Last Reported
assert "rt->rt_ifa->ifa_ifp != NULL" failed in route.c 830 1008d 1049d

Sample crash report:
panic: kernel diagnostic assertion "rt->rt_ifa->ifa_ifp != NULL" failed: fWAiRlNeI NG":/ sSyPzLka NlOlTe rL/OmWaEnRaEgDe rOsN/ muSlYtSiCAcoLLr e/3 k4e rnEeXIlT/ s0y s9/
n
eStopped at      savectx+0xb1:   movl    $0,%gs:0x530
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 315208  98819      0           0  0x4000000    0  syz-executor.1
*165271  58557     74    0x100012          0    1  pflogd
savectx(6,0,734fdf47eb0,3,73212103b16,7341cb98000) at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffbd7b0, count: 14
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{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
kernel diagnostic assertion "rt->rt_ifa->ifa_ifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 848
ddb{1}> trace
savectx(6,0,734fdf47eb0,3,73212103b16,7341cb98000) at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffbd7b0, count: -1
ddb{1}> show registers
rdi                                0
rsi                                0
rbp               0xffff800020aabeb0
rbx                                0
rdx               0xffff800020ac0288
rcx                                0
rax                             0x31
r8                0xffffffff819ab01f    kprintf+0x16f
r9                               0x1
r10                             0x25
r11               0xd94bcf4eade61e0d
r12                                0
r13                                0
r14               0xffff800020ac0288
r15                                0
rip               0xffffffff819953f1    savectx+0xb1
cs                               0x8
rflags                          0x46
rsp               0xffff800020aabe30
ss                              0x10
savectx+0xb1:   movl    $0,%gs:0x530
ddb{1}> show proc
PROC (pflogd) pid=165271 stat=onproc
    flags process=100012<EXEC,SUGID,PLEDGE> proc=0
    pri=51, usrpri=51, nice=20
    forw=0xffffffffffffffff, list=0xffff800020ac13d0,0xffff800020ac1658
    process=0xffff800020adce00 user=0xffff800020aa6000, vmspace=0xfffffd806e7d1008
    estcpu=1, cpticks=1, pctcpu=0.0
    user=0, sys=1, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 98819   80499  89786      0  2           0                syz-executor.1
 98819  315208  89786      0  7   0x4000000                syz-executor.1
 61379  180602  78133      0  3        0x80  nanosleep     syz-executor.0
 61379  261700  78133      0  3   0x4000080  nanosleep     syz-executor.0
 61379   50474  78133      0  3   0x4000080  fsleep        syz-executor.0
 89786  135556  36221      0  2       0x482                syz-executor.1
 78133  413340  36221      0  2       0x482                syz-executor.0
 20350  361706      1      0  3    0x100083  ttyin         getty
 40276  355317      0      0  3     0x14200  acct          acct
 40621  482199      0      0  3     0x14200  bored         sosplice
 36221   78459  81260      0  3        0x82  thrsleep      syz-fuzzer
 36221  418797  81260      0  2   0x4000482                syz-fuzzer
 36221  374365  81260      0  3   0x4000082  thrsleep      syz-fuzzer
 36221   27726  81260      0  3   0x4000082  thrsleep      syz-fuzzer
 36221  437807  81260      0  2   0x4000482                syz-fuzzer
 36221  166675  81260      0  3   0x4000082  kqread        syz-fuzzer
 36221  431601  81260      0  3   0x4000082  thrsleep      syz-fuzzer
 36221  229323  81260      0  3   0x4000082  thrsleep      syz-fuzzer
 36221   24511  81260      0  3   0x4000082  thrsleep      syz-fuzzer
 36221  464821  81260      0  3   0x4000082  thrsleep      syz-fuzzer
 81260  248526   5741      0  3    0x10008a  pause         ksh
  5741  351373  76384      0  3        0x92  select        sshd
 76384  223300      1      0  3        0x80  select        sshd
*58557  165271  98176     74  7    0x100012                pflogd
 98176  201661      1      0  3        0x80  netio         pflogd
 87554  220175  52574     73  3    0x100090  kqread        syslogd
 52574  452562      1      0  3    0x100082  netio         syslogd
 62235  231360      1     77  3    0x100090  poll          dhclient
  5464  270435      1      0  3        0x80  poll          dhclient
 33881  496028      0      0  3     0x14200  pgzero        zerothread
 71021  524094      0      0  3     0x14200  aiodoned      aiodoned
 85763  216030      0      0  3     0x14200  syncer        update
 62455  322392      0      0  3     0x14200  cleaner       cleaner
 84937   17255      0      0  3     0x14200  reaper        reaper
 89631  369373      0      0  3     0x14200  pgdaemon      pagedaemon
 18334  481842      0      0  3     0x14200  bored         crynlk
 43871  312508      0      0  3     0x14200  bored         crypto
 41802  375064      0      0  3  0x40014200  acpi0         acpi0
 17923   72280      0      0  3  0x40014200                idle1
 61657  280140      0      0  3     0x14200  bored         softnet
  3615   22757      0      0  3     0x14200  bored         systqmp
 30581   70209      0      0  3     0x14200  bored         systq
 88270  167370      0      0  2  0x40014200                softclock
 81618  349113      0      0  3  0x40014200                idle0
 65981  110691      0      0  3     0x14200  bored         smr
     1  356103      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{1}> show all locks
Process 98819 (syz-executor.1) thread 0xffff800020ace020 (315208)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826382b0)
#0  witness_lock+0x52e sys/kern/subr_witness.c:1163
#1  rt_clone+0x5c sys/net/route.c:266
#2  rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline]
#2  rtalloc_mpath+0xba sys/net/route.c:359
#3  ip_output+0x4f2 sys/netinet/ip_output.c:204
#4  rip_output+0x252 sys/netinet/raw_ip.c:289
#5  rip_usrreq+0x46a sys/netinet/raw_ip.c:538
#6  sosend+0x645 sys/kern/uipc_socket.c:524
#7  sendit+0x52b sys/kern/uipc_syscalls.c:662
#8  sys_sendmsg+0x1a4 sys/kern/uipc_syscalls.c:567
#9  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#9  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#10 Xsyscall+0x128
exclusive rwlock netlock r = 0 (0xffffffff8247e1a8)
#0  witness_lock+0x52e sys/kern/subr_witness.c:1163
#1  solock+0x5a sys/kern/uipc_socket2.c:282
#2  sosend+0x51b sys/kern/uipc_socket.c:512
#3  sendit+0x52b sys/kern/uipc_syscalls.c:662
#4  sys_sendmsg+0x1a4 sys/kern/uipc_syscalls.c:567
#5  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#5  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#6  Xsyscall+0x128
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim Kern Lim
         devbuf  9587   6441K    8540K  78643K     22953        0        0
            pcb    13      8K       9K  78643K       515        0        0
         rtable   134      5K       6K  78643K      1789        0        0
         ifaddr    89     18K      19K  78643K       505        0        0
       counters    39     33K      33K  78643K        39        0        0
       ioctlops     0      0K       4K  78643K      1575        0        0
            iov     0      0K      32K  78643K       477        0        0
          mount     1      1K       1K  78643K         1        0        0
         vnodes  1237     78K      78K  78643K      4929        0        0
      UFS quota     1     32K      32K  78643K         1        0        0
      UFS mount     5     36K      36K  78643K         5        0        0
            shm     2      1K       9K  78643K        73        0        0
         VM map    23     11K      11K  78643K        30        0        0
            sem    12      0K       0K  78643K       769        0        0
        dirhash    12      2K       2K  78643K        12        0        0
           ACPI  1808    196K     290K  78643K     12765        0        0
      file desc     6     17K      25K  78643K      2379        0        0
          sigio     0      0K       0K  78643K        25        0        0
           proc    62     63K      83K  78643K      1301        0        0
        subproc    32      2K       2K  78643K       310        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      1009        0        0
       in_multi    38      2K       2K  78643K       322        0        0
    ether_multi     1      0K       0K  78643K        26        0        0
            mrt     0      0K       0K  78643K        14        0        0
    ISOFS mount     1     32K      32K  78643K         1        0        0
  MSDOSFS mount     1     16K      16K  78643K         1        0        0
           ttys    72    318K     318K  78643K        72        0        0
           exec     0      0K       1K  78643K       673        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   149    201K     202K  78643K      9304        0        0
       UVM aobj   130      4K       4K  78643K       134        0        0
        memdesc     1      4K       4K  78643K         1        0        0
    crypto data     1      1K       1K  78643K         1        0        0
    ip6_options     0      0K       1K  78643K       528        0        0
            NDP    20      0K       0K  78643K       159        0        0
           temp   228   3565K    3641K  78643K     47728        0        0
         kqueue     0      0K       0K  78643K        12        0        0
      SYN cache     2     16K      16K  78643K         2        0        0
ddb{1}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp         64       64    0       57     1     0     1     1     0     8    0
plcache    128       20    0        0     1     0     1     1     0     8    0
rtpcb       80      192    0      190     1     0     1     1     0     8    0
rtentry    112      335    0      281     2     0     2     2     0     8    0
unpcb      120     1957    0     1942     4     3     1     2     0     8    0
syncache   264       14    0       14     6     6     0     1     0     8    0
tcpqe       32        2    0        2     2     2     0     1     0     8    0
tcpcb      544     1785    0     1781     4     3     1     2     0     8    0
inpcb      280     4257    0     4247     5     3     2     3     0     8    1
rttmr       72        3    0        3     3     3     0     1     0     8    0
nd6         48       55    0       46     1     0     1     1     0     8    0
pkpcb       40       24    0       24     8     8     0     1     0     8    0
ppxss      1128      65    0       65     8     7     1     1     0     8    1
pffrag     232       55    0       51     7     6     1     1     0   482    0
pffrnode    88       54    0       51     7     6     1     1     0     8    0
pffrent     40     1579    0     1539     7     6     1     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      211    0      148     1     0     1     1     0     8    0
pfstkey    112      211    0      148     2     0     2     2     0     8    0
pfstate    328      211    0      148     7     1     6     6     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     1511    0     1155    33     8    25    25     0     8    0
art_table   32     1512    0     1155     5     1     4     4     0     8    0
art_node    16      333    0      283     1     0     1     1     0     8    0
sysvmsgpl   40       40    0       16     1     0     1     1     0     8    0
semupl     112        4    0        4     2     2     0     1     0     8    0
semapl     112      763    0      753     1     0     1     1     0     8    0
shmpl      112      132    0        4     4     0     4     4     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino1pl    128     5192    0     3782    46     0    46    46     0     8    0
ffsino     272     5192    0     3782    95     0    95    95     0     8    0
nchpl      144     9137    0     8658    61    40    21    61     0     8    0
uvmvnodes   72     5926    0        0   108     0   108   108     0     8    0
vnodes     208     5926    0        0   312     0   312   312     0     8    0
namei      1024   32512    0    32512     1     0     1     1     0     8    1
percpumem   16       30    0        0     1     0     1     1     0     8    0
vcpupl     1984      21    0        0     3     0     3     3     0     8    0
vmpool     552       28    0        7     3     1     2     2     0     8    0
scsiplug    64        4    0        4     3     3     0     1     0     8    0
scxspl     192    30367    0    30367    23    22     1     7     0     8    1
plimitpl   152      236    0      228     1     0     1     1     0     8    0
sigapl     432     2532    0     2516     3     1     2     3     0     8    0
futexpl     56    57540    0    57539     1     0     1     1     0     8    0
knotepl    112      703    0      684     2     1     1     2     0     8    0
kqueuepl   104      646    0      644     1     0     1     1     0     8    0
pipepl     112     1894    0     1875     5     4     1     2     0     8    0
fdescpl    488     2533    0     2516     3     0     3     3     0     8    0
filepl     152    23850    0    23747    18    12     6     7     0     8    2
lockfpl    104      797    0      796     1     0     1     1     0     8    0
lockfspl    48      283    0      282     1     0     1     1     0     8    0
sessionpl  112       35    0       24     1     0     1     1     0     8    0
pgrppl      48       53    0       42     1     0     1     1     0     8    0
ucredpl     96     2283    0     2274     1     0     1     1     0     8    0
zombiepl   144     2517    0     2517     1     0     1     1     0     8    1
processpl  896     2551    0     2517     4     0     4     4     0     8    0
procpl     632     7696    0     7650     5     0     5     5     0     8    0
srpgc       64       20    0       20     7     7     0     1     0     8    0
sosppl     128       55    0       55     9     8     1     1     0     8    1
sockpl     384     6473    0     6446    23    19     4     7     0     8    1
mcl64k     65536    269    0        0    34     0    34    34     0     8    0
mcl16k     16384     10    0        0     2     0     2     2     0     8    0
mcl12k     12288     25    0        0     2     0     2     2     0     8    0
mcl9k      9216      15    0        0     2     0     2     2     0     8    0
mcl8k      8192      14    0        0     2     0     2     2     0     8    0
mcl4k      4096      32    0        0     3     1     2     3     0     8    0
mcl2k2     2112       4    0        0     1     0     1     1     0     8    0
mcl2k      2048     165    0        0    19     0    19    19     0     8    0
mtagpl      80       46    0        0     1     0     1     1     0     8    0
mbufpl     256     1090    0        0    59     0    59    59     0     8    0
bufpl      256    15044    0     7996   441     0   441   441     0     8    0
anonpl      16   360547    0   345157   148    59    89    94     0   124    7
amapchunkpl 152   19186    0    19067    49    43     6    19     0   158    0
amappl16   192    15839    0    14729   160   101    59    68     0     8    3
amappl15   184      244    0      244     2     2     0     1     0     8    0
amappl14   176      486    0      483     1     0     1     1     0     8    0
amappl13   168      164    0      164     2     2     0     1     0     8    0
amappl12   160       78    0       76     1     0     1     1     0     8    0
amappl11   152      629    0      614     1     0     1     1     0     8    0
amappl10   144      205    0      201     1     0     1     1     0     8    0
amappl9    136     1207    0     1199     1     0     1     1     0     8    0
amappl8    128      748    0      712     2     0     2     2     0     8    0
amappl7    120      301    0      292     1     0     1     1     0     8    0
amappl6    112      611    0      599     1     0     1     1     0     8    0
amappl5    104      328    0      312     1     0     1     1     0     8    0
amappl4     96     2431    0     2397     2     1     1     2     0     8    0
amappl3     88      977    0      969     1     0     1     1     0     8    0
amappl2     80    18618    0    18537     3     1     2     3     0     8    0
amappl1     72    67154    0    66702    25    15    10    20     0     8    0
amappl      80     8244    0     8189     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
dma128     128      253    0      253     1     1     0     1     0     8    0
dma64       64        6    0        6     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      133    0        4     3     0     3     3     0     8    0
uaddrrnd    24     2561    0     2516     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     2561    0     2516     1     0     1     1     0     8    0
vmmpekpl   168    25022    0    24980     3     0     3     3     0     8    0
vmmpepl    168   335957    0   333567   235    93   142   144     0   357   35
vmsppl     368     2532    0     2516     2     0     2     2     0     8    0
pdppl      4096    5129    0     5067     8     0     8     8     0     8    0
pvpl        32   926663    0   908237   287    80   207   216     0   265   22
pmappl     232     2560    0     2523     4     1     3     3     0     8    0
extentpl    40       41    0       26     1     0     1     1     0     8    0
phpool     112      711    0       15    20     0    20    20     0     8    0

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-openbsd-multicore 2019/10/20 06:13 openbsd 8b95a59bc25b 8c88c9c1 .config log report