syzbot


assert "!ISSET(rt->rt_flags, RTF_LOCAL)" failed in nd6.c (2)

Status: auto-closed as invalid on 2020/07/25 17:46
Reported-by: syzbot+d53985fa90628811e0fc@syzkaller.appspotmail.com
First crash: 844d, last: 844d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd assert "!ISSET(rt->rt_flags, RTF_LOCAL)" failed in nd6.c 1 899d 899d 3/3 fixed on 2020/04/22 21:18

Sample crash report:
panic: kernel diagnostic assertion "!ISSET(rt->rt_flags, RTF_LOCAL)" failed: file "/syzkaller/managers/main/kernel/sys/netinet6/nd6.c", line 728
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821da0c7) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff8222d6ec,ffffffff8220eab4,2d8,ffffffff82214604) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_free(fffffd805666e548) at nd6_free+0x1cf sys/netinet6/nd6.c:728
nd6_purge(ffff800000a02800) at nd6_purge+0x10f sys/netinet6/nd6.c:535
in6_ifdetach(ffff800000a02800) at in6_ifdetach+0xa7 sys/netinet6/in6_ifattach.c:432
if_detach(ffff800000a02800) at if_detach+0x148 sys/net/if.c:1152
tun_clone_destroy(ffff800000a02800) at tun_clone_destroy+0x1d8 sys/net/if_tun.c:329
tun_dev_close(5d01,7) at tun_dev_close+0x160 sys/net/if_tun.c:480
spec_close(ffff80001e8343f0) at spec_close+0x311 sys/kern/spec_vnops.c:555
VOP_CLOSE(fffffd80678f2c30,7,fffffd806c3bfa20,ffff80001d739008) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174
vn_closefile(fffffd80567d2d30,ffff80001d739008) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd80567d2d30,ffff80001d739008) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614
fdrop(fffffd80567d2d30,ffff80001d739008) at fdrop+0xc2 sys/kern/kern_descrip.c:1276
closef(fffffd80567d2d30,ffff80001d739008) at closef+0x117 sys/kern/kern_descrip.c:1260
end trace frame: 0xffff80001e8345c0, count: 0
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> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
kernel diagnostic assertion "!ISSET(rt->rt_flags, RTF_LOCAL)" failed: file "/syzkaller/managers/main/kernel/sys/netinet6/nd6.c", line 728
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff821da0c7) at panic+0x15c sys/kern/subr_prf.c:207
__assert(ffffffff8222d6ec,ffffffff8220eab4,2d8,ffffffff82214604) at __assert+0x2b sys/kern/subr_prf.c:154
nd6_free(fffffd805666e548) at nd6_free+0x1cf sys/netinet6/nd6.c:728
nd6_purge(ffff800000a02800) at nd6_purge+0x10f sys/netinet6/nd6.c:535
in6_ifdetach(ffff800000a02800) at in6_ifdetach+0xa7 sys/netinet6/in6_ifattach.c:432
if_detach(ffff800000a02800) at if_detach+0x148 sys/net/if.c:1152
tun_clone_destroy(ffff800000a02800) at tun_clone_destroy+0x1d8 sys/net/if_tun.c:329
tun_dev_close(5d01,7) at tun_dev_close+0x160 sys/net/if_tun.c:480
spec_close(ffff80001e8343f0) at spec_close+0x311 sys/kern/spec_vnops.c:555
VOP_CLOSE(fffffd80678f2c30,7,fffffd806c3bfa20,ffff80001d739008) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174
vn_closefile(fffffd80567d2d30,ffff80001d739008) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd80567d2d30,ffff80001d739008) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614
fdrop(fffffd80567d2d30,ffff80001d739008) at fdrop+0xc2 sys/kern/kern_descrip.c:1276
closef(fffffd80567d2d30,ffff80001d739008) at closef+0x117 sys/kern/kern_descrip.c:1260
fdfree(ffff80001d739008) at fdfree+0x100 sys/kern/kern_descrip.c:1192
exit1(ffff80001d739008,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197
postsig(ffff80001d739008,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline]
postsig(ffff80001d739008,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415
userret(ffff80001d739008) at userret+0x159 sys/kern/kern_sig.c:1867
syscall(ffff80001e834870) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
syscall(ffff80001e834870) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffef5b0, count: -20
ddb> show registers
rdi                                0
rsi                              0x1
rbp               0xffff80001e834060
rbx               0xffff80001e834110
rdx                              0x2
rcx                                0
rax                                0
r8                0xffff80001e834020
r9                               0x1
r10                                0
r11               0xaa2ddfcf80db8e45
r12                     0x3000000008
r13               0xffff80001e834070
r14                            0x100
r15                              0x1
rip               0xffffffff817e2fa8    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff80001e834050
ss                              0x10
db_enter+0x18:  addq    $0x8,%rsp
ddb> show proc
PROC (syz-executor.1) pid=331454 stat=onproc
    flags process=a<EXEC,EXITING,8ORPHAN> proc=2000<WEXIT>
    pri=32, usrpri=74, nice=20
    forw=0xffffffffffffffff, list=0xffff80001d7394e8,0xffff80001d73a878
    process=0xffff8000ffffae70 user=0xffff80001e82f000, vmspace=0xfffffd806bc0a880
    estcpu=36, cpticks=1, pctcpu=0.1
    user=0, sys=1, intr=0
ddb> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 43057   70011  99355      0  3         0x2  biowait       syz-executor.0
 96078  293705      0      0  3     0x14200  bored         sosplice
 99355  507062  35810      0  3        0x82  thrsleep      syz-fuzzer
 99355  470044  35810      0  3   0x4000082  nanosleep     syz-fuzzer
 99355  450286  35810      0  3   0x4000082  thrsleep      syz-fuzzer
 99355  462780  35810      0  3   0x4000082  thrsleep      syz-fuzzer
 99355   52450  35810      0  3   0x4000082  thrsleep      syz-fuzzer
 99355  152038  35810      0  3   0x4000082  kqread        syz-fuzzer
 99355   80856  35810      0  3   0x4000082  thrsleep      syz-fuzzer
 99355  218314  35810      0  3   0x4000082  thrsleep      syz-fuzzer
 35810  319565   2247      0  3    0x10008a  pause         ksh
  2247  232617   1697      0  3        0x92  select        sshd
 97836  208352      1      0  3    0x100083  ttyin         getty
  1697  373656      1      0  3        0x80  select        sshd
 32850  105478  53678     73  3    0x100090  kqread        syslogd
 53678   20328      1      0  3    0x100082  netio         syslogd
 53036  457614      1     77  3    0x100090  poll          dhclient
 65190  160393      1      0  3        0x80  poll          dhclient
 13625   11573      0      0  3     0x14200  bored         smr
 36482  346829      0      0  3     0x14200  pgzero        zerothread
 81098   14262      0      0  3     0x14200  aiodoned      aiodoned
 36651  277017      0      0  3     0x14200  syncer        update
 72798    5061      0      0  3     0x14200  cleaner       cleaner
 81531  422716      0      0  3     0x14200  reaper        reaper
 85160  446538      0      0  3     0x14200  pgdaemon      pagedaemon
 47529   77441      0      0  3     0x14200  bored         crynlk
 37102  501764      0      0  3     0x14200  bored         crypto
 69075  459113      0      0  3  0x40014200  acpi0         acpi0
 19497  483259      0      0  3     0x14200  bored         softnet
 43088  335805      0      0  2     0x14200                systqmp
   251   69989      0      0  3     0x14200  bored         systq
  4835  383678      0      0  3  0x40014200  bored         softclock
 23249  147580      0      0  3  0x40014200                idle0
     1  261400      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb> show all locks
No such command
ddb> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf  9482   6336K    6977K  78643K     11510        0
            pcb    13      8K       8K  78643K       129        0
         rtable    70      2K       3K  78643K       305        0
         ifaddr    52     10K      13K  78643K       102        0
       counters    20     16K      16K  78643K        25        0
       ioctlops     0      0K       2K  78643K        27        0
            iov     0      0K      12K  78643K        46        0
          mount     1      1K       1K  78643K         1        0
         vnodes  1218     77K      77K  78643K      1503        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       5K  78643K         5        0
         VM map     2      0K       0K  78643K         2        0
            sem    12      0K       0K  78643K        21        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1794    195K     288K  78643K     12646        0
      file desc     4      9K      25K  78643K       277        0
          sigio     0      0K       0K  78643K         4        0
           proc    51     38K      55K  78643K       417        0
        subproc    23      1K       2K  78643K        51        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
    ip_moptions     0      0K       0K  78643K        32        0
       in_multi    41      2K       3K  78643K       114        0
    ether_multi     1      0K       0K  78643K        11        0
            mrt     0      0K       0K  78643K         6        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys    43    201K     201K  78643K        43        0
           exec     0      0K       1K  78643K       198        0
        pagedep     1      8K       8K  78643K         1        0
       inodedep     1     32K      32K  78643K         1        0
         newblk     1      0K       0K  78643K         1        0
        VM swap     7     26K      26K  78643K         7        0
       UVM amap   125     39K      55K  78643K      1519        0
       UVM aobj    22      4K       4K  78643K        22        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
    ip6_options     0      0K       0K  78643K        54        0
            NDP     9      0K       0K  78643K        22        0
           temp    77   3032K    3097K  78643K      6365        0
         kqueue     3      4K      12K  78643K        29        0
      SYN cache     2     16K      16K  78643K         2        0
ddb> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp         64        9    0        7     1     0     1     1     0     8    0
rtpcb       80       31    0       29     1     0     1     1     0     8    0
rtentry    112       73    0       48     2     0     2     2     0     8    0
unpcb      120      171    0      163     1     0     1     1     0     8    0
syncache   264        9    0        9     2     1     1     1     0     8    1
tcpqe       32      152    0      152     2     1     1     1     0     8    1
tcpcb      544      123    0      118     1     0     1     1     0     8    0
inpcb      280      406    0      398     2     0     2     2     0     8    1
rttmr       72        3    0        3     1     1     0     1     0     8    0
nd6         48       11    0       10     1     0     1     1     0     8    0
ppxss      1128       3    0        3     1     0     1     1     0     8    1
art_heap8  4096       2    0        0     2     0     2     2     0     8    0
art_heap4  256      295    0      158    13     0    13    13     0     8    3
art_table   32      297    0      158     2     0     2     2     0     8    0
art_node    16       72    0       43     1     0     1     1     0     8    0
semupl     112        2    0        2     1     0     1     1     0     8    1
semapl     112       18    0        8     1     0     1     1     0     8    0
shmpl      112       20    0        0     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1747    0      352    88     0    88    88     0     8    0
ffsino     240     1747    0      352    83     0    83    83     0     8    0
nchpl      144     2318    0      732    60     0    60    60     0     8    0
uvmvnodes   72     2025    0        0    37     0    37    37     0     8    0
vnodes     208     2025    0        0   107     0   107   107     0     8    0
namei      1024    6480    0     6479     1     0     1     1     0     8    0
vcpupl     1984       1    0        0     1     0     1     1     0     8    0
vmpool     528        3    0        2     1     0     1     1     0     8    0
scsiplug    64        1    0        1     1     0     1     1     0     8    1
scxspl     192     6797    0     6796     1     0     1     1     0     8    0
plimitpl   152       49    0       42     1     0     1     1     0     8    0
sigapl     424      461    0      433     4     0     4     4     0     8    0
futexpl     56     5454    0     5454     1     0     1     1     0     8    1
knotepl    112       97    0       80     1     0     1     1     0     8    0
kqueuepl   144       86    0       84     1     0     1     1     0     8    0
pipelkpl    16       91    0       82     1     0     1     1     0     8    0
pipepl     120      182    0      165     1     0     1     1     0     8    0
fdescpl    432      446    0      433     2     0     2     2     0     8    0
filepl     120     2868    0     2784     4     0     4     4     0     8    1
lockfpl    104       47    0       46     1     0     1     1     0     8    0
lockfspl    48       22    0       21     1     0     1     1     0     8    0
sessionpl  112       18    0        8     1     0     1     1     0     8    0
pgrppl      48       22    0       12     1     0     1     1     0     8    0
ucredpl     96      339    0      332     1     0     1     1     0     8    0
zombiepl   144      434    0      433     1     0     1     1     0     8    0
processpl  920      461    0      433     4     0     4     4     0     8    0
procpl     624      743    0      708     4     0     4     4     0     8    1
sosppl     128        7    0        7     1     0     1     1     0     8    1
sockpl     400      611    0      593     5     1     4     4     0     8    1
mcl64k     65536     37    0       37     1     0     1     1     0     8    1
mcl12k     12288      6    0        6     1     0     1     1     0     8    1
mcl9k      9216       5    0        5     2     1     1     1     0     8    1
mcl8k      8192       2    0        2     2     1     1     1     0     8    1
mcl4k      4096      24    0       24     2     1     1     1     0     8    1
mcl2k2     2112       3    0        3     2     1     1     1     0     8    1
mcl2k      2048   58218    0    58164    17     8     9    14     0     8    1
mtagpl      80      116    0      116     3     1     2     2     0     8    2
mbufpl     256    94299    0    94224    22     2    20    20     0     8    6
bufpl      280     4570    0      186   314     0   314   314     0     8    0
anonpl      16    65859    0    51968    77     1    76    76     0   107   13
amapchunkpl 152    3347    0     3213    20     4    16    20     0   158   10
amappl16   192     2485    0     1625    57     7    50    54     0     8    6
amappl15   184        9    0        7     1     0     1     1     0     8    0
amappl14   176       28    0       21     1     0     1     1     0     8    0
amappl13   168       37    0       36     1     0     1     1     0     8    0
amappl12   160       15    0       10     2     1     1     1     0     8    0
amappl11   152       67    0       56     1     0     1     1     0     8    0
amappl10   144      120    0      115     1     0     1     1     0     8    0
amappl9    136      477    0      475     1     0     1     1     0     8    0
amappl8    128      442    0      406     2     0     2     2     0     8    0
amappl7    120      213    0      202     1     0     1     1     0     8    0
amappl6    112       40    0       32     1     0     1     1     0     8    0
amappl5    104      391    0      381     1     0     1     1     0     8    0
amappl4     96      445    0      420     1     0     1     1     0     8    0
amappl3     88      114    0      109     1     0     1     1     0     8    0
amappl2     80     2702    0     2644     3     1     2     3     0     8    0
amappl1     72    17822    0    17414    26    16    10    20     0     8    0
amappl      80     1007    0      965     3     1     2     2     0    84    1
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       18    0       17     1     0     1     1     0     8    0
aobjpl      64       21    0        0     1     0     1     1     0     8    0
uaddrrnd    24      449    0      435     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      449    0      435     1     0     1     1     0     8    0
vmmpekpl   168     6801    0     6773     2     0     2     2     0     8    0
vmmpepl    168    61153    0    59308   135    16   119   119     0   357   32
vmsppl     272      448    0      435     2     0     2     2     0     8    1
pdppl      4096     904    0      871     6     1     5     6     0     8    0
pvpl        32   190992    0   174172   180     0   180   180     0   265   30
pmappl     200      448    0      435     1     0     1     1     0     8    0
extentpl    40       46    0       29     1     0     1     1     0     8    0
phpool     112      254    0       16     7     0     7     7     0     8    0

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-openbsd-main 2020/04/26 17:45 openbsd bd99d219c11e 6e85fc25 .config log report