syzbot


panic: kernel diagnostic asspearntiico:n k e"rnretl- >rdita_gifnostic assertion "!_kernel_lock_held()" failed: file "/sy

Status: closed as dup on 2019/10/07 07:05
Reported-by: syzbot+f90542153cb10e64c706@syzkaller.appspotmail.com
First crash: 1037d, last: 1037d
Duplicate of (1):
Title Repro Cause bisect Fix bisect Count Last Reported
assert "rt->rt_ifa->ifa_ifp != NULL" failed in route.c 830 1005d 1046d

Sample crash report:
panic: kernel diagnostic asspearntiico:n k e"rnretl- >rdita_gifnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 690
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 448886  44587      0           0  0x4000000    0  syz-executor.1
* 71812  63164      0           0  0x4000000    1  syz-executor.0
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff82206683,ffffffff821f523c,2b2,ffffffff821d491b) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: 11
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
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff82206683,ffffffff821f523c,2b2,ffffffff821d491b) at __assert+0x2b sys/kern/subr_prf.c:154
proc_trampoline_mp() at proc_trampoline_mp+0x123
end trace frame: 0x0, count: -4
ddb{1}> show registers
rdi                                0
rsi                              0x1
rbp               0xffff800021b897c0
rbx               0xffff800021b89870
rdx               0xffff800020abf8c8
rcx                                0
rax                                0
r8                0xffffffff81ba769f    kprintf+0x16f
r9                               0x1
r10                             0x25
r11               0x55750ba322a92527
r12                     0x3000000008
r13               0xffff800021b897d0
r14                            0x104
r15                              0x1
rip               0xffffffff810273e8    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff800021b897b0
ss                                 0
db_enter+0x18:  addq    $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.0) pid=71812 stat=onproc
    flags process=0 proc=4000000<THREAD>
    pri=75, usrpri=75, nice=20
    forw=0xffffffffffffffff, list=0xffff800020abe018,0xffff800020abea08
    process=0xffff800020a4b888 user=0xffff800021b84000, vmspace=0xfffffd807f00b170
    estcpu=36, cpticks=1, pctcpu=0.0
    user=0, sys=1, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 44587   83908  57012      0  2           0                syz-executor.1
 44587  448886  57012      0  7   0x4000000                syz-executor.1
 63164  475867  89388      0  2           0                syz-executor.0
*63164   71812  89388      0  7   0x4000000                syz-executor.0
 57012    1871  98058      0  3        0x82  nanosleep     syz-executor.1
 89388  324884  98058      0  3        0x82  nanosleep     syz-executor.0
 92509  462396      1      0  3    0x100083  ttyin         getty
 78337  483904      0      0  3     0x14200  acct          acct
  1406  521128      0      0  3     0x14200  bored         sosplice
 98058  186808  79699      0  3        0x82  thrsleep      syz-fuzzer
 98058   95382  79699      0  3   0x4000082  nanosleep     syz-fuzzer
 98058  303135  79699      0  3   0x4000082  thrsleep      syz-fuzzer
 98058  276197  79699      0  3   0x4000082  thrsleep      syz-fuzzer
 98058  472004  79699      0  3   0x4000082  thrsleep      syz-fuzzer
 98058  485779  79699      0  3   0x4000082  thrsleep      syz-fuzzer
 98058  421359  79699      0  3   0x4000082  thrsleep      syz-fuzzer
 98058  200827  79699      0  3   0x4000082  thrsleep      syz-fuzzer
 98058  245022  79699      0  3   0x4000082  thrsleep      syz-fuzzer
 98058  143007  79699      0  3   0x4000082  kqread        syz-fuzzer
 79699  481426  33734      0  3    0x10008a  pause         ksh
 33734    5974  58036      0  3        0x92  select        sshd
 58036  121363      1      0  3        0x80  select        sshd
 84035  520113  78159     74  3    0x100092  bpf           pflogd
 78159  465221      1      0  3        0x80  netio         pflogd
 20114  391349  57369     73  3    0x100090  kqread        syslogd
 57369   35675      1      0  3    0x100082  netio         syslogd
 89854    9622      1     77  3    0x100090  poll          dhclient
 86776  234420      1      0  3        0x80  poll          dhclient
 22070   94288      0      0  2     0x14200                zerothread
 61239    8931      0      0  3     0x14200  aiodoned      aiodoned
 59494   71994      0      0  3     0x14200  syncer        update
  5391  323382      0      0  3     0x14200  cleaner       cleaner
 90572  370205      0      0  3     0x14200  reaper        reaper
 87255  332236      0      0  3     0x14200  pgdaemon      pagedaemon
 14832   16976      0      0  3     0x14200  bored         crynlk
 87464  509705      0      0  3     0x14200  bored         crypto
 43854  110669      0      0  3  0x40014200  acpi0         acpi0
 52738  287132      0      0  3  0x40014200                idle1
 26502  495161      0      0  3     0x14200  bored         softnet
 50877  278223      0      0  3     0x14200  bored         systqmp
 14121  414693      0      0  3     0x14200  bored         systq
 56472  435434      0      0  3  0x40014200  bored         softclock
 43289  232695      0      0  3  0x40014200                idle0
 42713   99205      0      0  3     0x14200  bored         smr
     1  152971      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{1}> show all locks
Process 44587 (syz-executor.1) thread 0xffff800020abe9f8 (448886)
exclusive rwlock netlock r = 0 (0xffffffff824c1198)
#0  witness_lock+0x52e sys/kern/subr_witness.c:1163
#1  solock+0x5a sys/kern/uipc_socket2.c:282
#2  sys_connect+0x6b sys/kern/uipc_syscalls.c:362
#3  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#3  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555
#4  Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82624d88)
#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{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim Kern Lim
         devbuf  9563   7191K    8091K  78643K     13105        0        0
            pcb    13     13K      15K  78643K       232        0        0
         rtable   121     13K      13K  78643K       949        0        0
         ifaddr    74     15K      15K  78643K       278        0        0
       counters    39     33K      33K  78643K        39        0        0
       ioctlops     0      0K       4K  78643K      1532        0        0
            iov     0      0K      24K  78643K       237        0        0
          mount     1      1K       1K  78643K         1        0        0
         vnodes  1224     77K      77K  78643K      2206        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        15        0        0
         VM map     8      4K       4K  78643K        12        0        0
            sem    12      0K       0K  78643K       191        0        0
        dirhash    12      2K       2K  78643K        12        0        0
           ACPI  1808    196K     290K  78643K     12765        0        0
      file desc     6     17K      25K  78643K      1145        0        0
          sigio     0      0K       0K  78643K        12        0        0
           proc    61     63K      95K  78643K       892        0        0
        subproc    32      2K       2K  78643K       189        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        74        0        0
       in_multi    36      2K       2K  78643K       179        0        0
    ether_multi     1      0K       0K  78643K        10        0        0
            mrt     0      0K       0K  78643K        13        0        0
    ISOFS mount     1     32K      32K  78643K         1        0        0
  MSDOSFS mount     1     16K      16K  78643K         1        0        0
           ttys    60    265K     265K  78643K        60        0        0
           exec     0      0K       1K  78643K       431        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   116     71K      72K  78643K      4936        0        0
       UVM aobj    45      4K       4K  78643K        45        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       208        0        0
            NDP    16      0K       1K  78643K        88        0        0
           temp   200   3564K    4204K  78643K     38186        0        0
         kqueue     0      0K       0K  78643K         5        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       27    0       20     1     0     1     1     0     8    0
plcache    128       20    0        0     1     0     1     1     0     8    0
rtpcb       80       89    0       87     1     0     1     1     0     8    0
rtentry    112      172    0      126     2     0     2     2     0     8    0
unpcb      120      390    0      380     2     1     1     2     0     8    0
syncache   264        6    0        6     3     3     0     1     0     8    0
tcpqe       32     6200    0     6200     3     3     0     1     0     8    0
tcpcb      544      579    0      574    12     7     5    12     0     8    4
inpcb      280     3133    0     3123    22    17     5    13     0     8    4
rttmr       72        5    0        5     2     2     0     1     0     8    0
nd6         48       26    0       22     1     0     1     1     0     8    0
pkpcb       40        2    0        2     1     1     0     1     0     8    0
ppxss      1128      28    0       28     2     2     0     1     0     8    0
pffrag     232       19    0       19     5     4     1     1     0   482    1
pffrnode    88       19    0       19     5     4     1     1     0     8    1
pffrent     40      296    0      296     5     4     1     1     0     8    1
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       91    0       42     1     0     1     1     0     8    0
pfstkey    112       91    0       42     2     0     2     2     0     8    0
pfstate    328       91    0       42     5     0     5     5     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      740    0      519    17     3    14    15     0     8    0
art_table   32      741    0      519     2     0     2     2     0     8    0
art_node    16      169    0      127     1     0     1     1     0     8    0
sysvmsgpl   40       54    0       24     1     0     1     1     0     8    0
semupl     112        1    0        1     1     1     0     1     0     8    0
semapl     112      187    0      177     1     0     1     1     0     8    0
shmpl      112       43    0        0     2     0     2     2     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino1pl    128     3270    0     1863    46     0    46    46     0     8    0
ffsino     272     3270    0     1863    95     0    95    95     0     8    0
nchpl      144     5067    0     3460    61     0    61    61     0     8    0
uvmvnodes   72     4031    0        0    74     0    74    74     0     8    0
vnodes     208     4031    0        0   213     0   213   213     0     8    0
namei      1024   15954    0    15954     2     1     1     1     0     8    1
percpumem   16       30    0        0     1     0     1     1     0     8    0
vcpupl     1984       6    0        0     1     0     1     1     0     8    0
vmpool     552       10    0        4     1     0     1     1     0     8    0
scsiplug    64        2    0        2     1     1     0     1     0     8    0
scxspl     192    16168    0    16168    13    12     1     7     0     8    1
plimitpl   152      105    0       97     1     0     1     1     0     8    0
sigapl     432     1319    0     1303     4     1     3     3     0     8    1
futexpl     56    21306    0    21306     1     0     1     1     0     8    1
knotepl    112      345    0      326     1     0     1     1     0     8    0
kqueuepl   104      388    0      386     4     3     1     4     0     8    0
pipepl     112      862    0      843     4     3     1     2     0     8    0
fdescpl    488     1320    0     1303     3     0     3     3     0     8    0
filepl     152    10716    0    10612    27    18     9    14     0     8    5
lockfpl    104      378    0      377     1     0     1     1     0     8    0
lockfspl    48      126    0      125     1     0     1     1     0     8    0
sessionpl  112       28    0       17     1     0     1     1     0     8    0
pgrppl      48       38    0       27     1     0     1     1     0     8    0
ucredpl     96      956    0      946     1     0     1     1     0     8    0
zombiepl   144     1303    0     1303     3     2     1     1     0     8    1
processpl  896     1337    0     1303     5     0     5     5     0     8    1
procpl     632     3727    0     3682     6     1     5     5     0     8    1
srpgc       64       10    0       10     2     2     0     1     0     8    0
sosppl     128       15    0       15     4     4     0     1     0     8    0
sockpl     384     3679    0     3657    35    29     6    21     0     8    3
mcl64k     65536     16    0        0     2     0     2     2     0     8    0
mcl16k     16384      5    0        0     1     0     1     1     0     8    0
mcl12k     12288      9    0        0     1     0     1     1     0     8    0
mcl9k      9216       3    0        0     1     0     1     1     0     8    0
mcl8k      8192      12    0        0     2     0     2     2     0     8    0
mcl4k      4096      10    0        0     2     0     2     2     0     8    0
mcl2k2     2112       2    0        0     1     0     1     1     0     8    0
mcl2k      2048     195    0        0    23     0    23    23     0     8    0
mtagpl      80       22    0        0     1     0     1     1     0     8    0
mbufpl     256      334    0        0    19     1    18    18     0     8    0
bufpl      256    11879    0     4831   441     0   441   441     0     8    0
anonpl      16   163022    0   147049    95    22    73    88     0   124    0
amapchunkpl 152    9133    0     9022    23    16     7    12     0   158    0
amappl16   192     6417    0     5402    84    22    62    62     0     8   11
amappl15   184      560    0      558     4     3     1     1     0     8    0
amappl14   176       81    0       79     1     0     1     1     0     8    0
amappl13   168      197    0      197     3     2     1     1     0     8    1
amappl12   160       41    0       36     1     0     1     1     0     8    0
amappl11   152      516    0      500     1     0     1     1     0     8    0
amappl10   144       15    0       10     1     0     1     1     0     8    0
amappl9    136      757    0      750     1     0     1     1     0     8    0
amappl8    128      290    0      254     2     0     2     2     0     8    0
amappl7    120       94    0       86     1     0     1     1     0     8    0
amappl6    112      509    0      494     1     0     1     1     0     8    0
amappl5    104      227    0      211     1     0     1     1     0     8    0
amappl4     96     2132    0     2102     1     0     1     1     0     8    0
amappl3     88      165    0      159     1     0     1     1     0     8    0
amappl2     80     9384    0     9304     3     1     2     3     0     8    0
amappl1     72    39719    0    39264    26    16    10    20     0     8    0
amappl      80     4132    0     4090     3     1     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       44    0        0     1     0     1     1     0     8    0
uaddrrnd    24     1330    0     1303     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     1330    0     1303     1     0     1     1     0     8    0
vmmpekpl   168    14668    0    14631     3     0     3     3     0     8    0
vmmpepl    168   174763    0   172489   174    38   136   137     0   357   37
vmsppl     368     1319    0     1303     2     0     2     2     0     8    0
pdppl      4096    2667    0     2620    10     3     7     7     0     8    1
pvpl        32   457581    0   438345   227    41   186   209     0   265   14
pmappl     232     1329    0     1307     2     0     2     2     0     8    0
extentpl    40       41    0       26     1     0     1     1     0     8    0
phpool     112      636    0       18    18     0    18    18     0     8    0

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-openbsd-multicore 2019/10/07 04:25 openbsd 8b165c1a053b f3f7d9c8 .config log report