syzbot


uvm_fault: ADDR: movl $ADDR,0(%rdi)ddb> ddb> set $lines = 0ddb> set $maxwidth = 0ddb> show panickernel page

Status: closed as invalid on 2019/09/28 09:34
Reported-by: syzbot+84b981190c4f5c2de0d6@syzkaller.appspotmail.com
First crash: 1885d, last: 1885d

Sample crash report:
uvm_fault(0xffffffff82524170, 0xfffffd802ea85278, 0, 4) -> e
kernel: page fault trap, code=0
Stopped at      0xfffffd802ea85278:     movl    $0xffffffffdc4907fc,0(%rdi)
ddb> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
kernel page fault
uvm_fault(0xffffffff82524170, 0xfffffd802ea85278, 0, 4) -> e
fffffd802ea85278(b,ffff800014892848,83,ffff8000148928e8,0,b) at 0xfffffd802ea85278
end trace frame: 0xffff800014892940, count: 0
ddb> trace
fffffd802ea85278(b,ffff800014892848,83,ffff8000148928e8,0,b) at 0xfffffd802ea85278
rt_match(fffffd803d4185f8,0,1,0) at rt_match+0xbe rt_clone sys/net/route.c:266 [inline]
rt_match(fffffd803d4185f8,0,1,0) at rt_match+0xbe sys/net/route.c:242
in_pcbselsrc(ffff8000148929c0,fffffd8037050a20,fffffd803d418578) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934
in_pcbconnect(fffffd803d418578,fffffd8037050a00) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492
udp_usrreq(fffffd802a90ec70,4,0,fffffd8037050a00,0,ffff800014914018) at udp_usrreq+0x560
sys_connect(ffff800014914018,ffff800014892b48,ffff800014892b90) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388
syscall(ffff800014892c10) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555
Xsyscall(6,0,fffffffffffffed2,0,3,5b77dab0010) at Xsyscall+0x128
end of kernel
end trace frame: 0x5b9a7ade190, count: -8
ddb> show registers
rdi               0xffff800000acf000
rsi                              0xb
rbp               0xffff800014892830
rbx               0xfffffd802e70d858
rdx               0xfffffd802e70d858
rcx               0xffff800015532000
rax               0xffff800015532000
r8                             0x100
r9                               0x7
r10               0xd2c3abbbd22c7d0c
r11               0xfffffd802ea85278
r12               0xfffffd802e70d858
r13               0xffff800014892848
r14               0xffff8000148928e8
r15               0xffff80000005b270
rip               0xfffffd802ea85278
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff800014892738
ss                              0x10
0xfffffd802ea85278:     movl    $0xffffffffdc4907fc,0(%rdi)
ddb> show proc
PROC (syz-executor.0) pid=216738 stat=onproc
    flags process=0 proc=4000000<THREAD>
    pri=80, usrpri=80, nice=20
    forw=0xffffffffffffffff, list=0xffff800014915b40,0xffffffff82560a98
    process=0xffff8000148a2a38 user=0xffff80001488d000, vmspace=0xfffffd803f014aa0
    estcpu=36, cpticks=1, pctcpu=0.0
    user=0, sys=1, intr=0
ddb> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 60896  418878   3672      0  2           0                syz-executor.0
*60896  216738   3672      0  7   0x4000000                syz-executor.0
 92972   67132    644      0  2         0x2                syz-executor.1
  3672  248377    644      0  3        0x82  nanosleep     syz-executor.0
 23277  357630      0      0  3     0x14200  acct          acct
 22894  173373      1      0  3    0x100083  ttyin         getty
 99292  108321      0      0  3     0x14200  bored         sosplice
   644   63390  52473      0  3        0x82  thrsleep      syz-fuzzer
   644   65321  52473      0  3   0x4000082  nanosleep     syz-fuzzer
   644  199837  52473      0  3   0x4000082  kqread        syz-fuzzer
   644  201713  52473      0  3   0x4000082  thrsleep      syz-fuzzer
   644   65479  52473      0  3   0x4000082  thrsleep      syz-fuzzer
   644  336625  52473      0  3   0x4000082  thrsleep      syz-fuzzer
   644  329262  52473      0  3   0x4000082  thrsleep      syz-fuzzer
   644   88613  52473      0  3   0x4000082  thrsleep      syz-fuzzer
 52473  352227  69055      0  3    0x10008a  pause         ksh
 69055  494258   2441      0  3        0x92  select        sshd
  2441  282440      1      0  3        0x80  select        sshd
 57615  523133  74792     73  3    0x100090  kqread        syslogd
 74792  332347      1      0  3    0x100082  netio         syslogd
 97234  461043      1     77  3    0x100090  poll          dhclient
 16289  434121      1      0  3        0x80  poll          dhclient
 11181   77917      0      0  2     0x14200                zerothread
 95801  272579      0      0  3     0x14200  aiodoned      aiodoned
 61311  204347      0      0  3     0x14200  syncer        update
 62085  426707      0      0  3     0x14200  cleaner       cleaner
 25921  441877      0      0  3     0x14200  reaper        reaper
  5462   52356      0      0  3     0x14200  pgdaemon      pagedaemon
 98972  400150      0      0  3     0x14200  bored         crynlk
 55417  248556      0      0  3     0x14200  bored         crypto
   521  294182      0      0  3  0x40014200  acpi0         acpi0
 92086  336305      0      0  3     0x14200  bored         softnet
 49814  132787      0      0  3     0x14200  bored         systqmp
 77179  143073      0      0  3     0x14200  bored         systq
 91304  311244      0      0  3  0x40014200  bored         softclock
 10936   64699      0      0  3  0x40014200                idle0
 48765  201907      0      0  3     0x14200  bored         smr
     1  355874      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 Kern Lim
         devbuf  9609   7211K   15209K  78643K     38241        0        0
            pcb    13     11K      13K  78643K      1566        0        0
         rtable   117     12K      14K  78643K      3555        0        0
         ifaddr    96     21K      22K  78643K      1040        0        0
       counters    19     16K      16K  78643K        19        0        0
       ioctlops     0      0K       2K  78643K       298        0        0
            iov     0      0K      32K  78643K      1396        0        0
          mount     1      1K       1K  78643K         1        0        0
         vnodes  1219     77K      77K  78643K      9328        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        73        0        0
         VM map     2      0K       0K  78643K        28        0        0
            sem    12      1K       1K  78643K      2546        0        0
        dirhash    12      2K       2K  78643K        12        0        0
           ACPI  1793    195K     288K  78643K     12645        0        0
      file desc     5     13K      25K  78643K      7799        0        0
          sigio     0      0K       0K  78643K       101        0        0
           proc    50     38K      63K  78643K      2256        0        0
        subproc    32      2K       2K  78643K       552        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       482        0        0
       in_multi    24      1K       2K  78643K       593        0        0
    ether_multi     1      0K       0K  78643K        37        0        0
            mrt     0      0K       0K  78643K        40        0        0
    ISOFS mount     1     32K      32K  78643K         1        0        0
  MSDOSFS mount     1     16K      16K  78643K         1        0        0
           ttys    84    371K     371K  78643K        84        0        0
           exec     0      0K       1K  78643K      2089        0        0
     pfkey data     0      0K       4K  78643K         2        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      40K  78643K     22122        0        0
       UVM aobj   130      6K       6K  78643K       146        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      1306        0        0
            NDP    23      0K       1K  78643K       323        0        0
           temp   247   3541K    4181K  78643K    260796        0        0
         kqueue     0      0K       0K  78643K        51        0        0
      SYN cache     2     16K      16K  78643K         2        0        0
ddb> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp         64      114    0      108     1     0     1     1     0     8    0
rtpcb       80      561    0      559     1     0     1     1     0     8    0
rtentry    112      574    0      535     2     0     2     2     0     8    0
unpcb      120    17681    0    17653    31    29     2     3     0     8    0
syncache   264       30    0       30    15    15     0     1     0     8    0
sackhl      24        1    0        1     1     1     0     1     0     8    0
tcpqe       32     7807    0     7807     8     8     0     1     0     8    0
tcpcb      544     2350    0     2346    33    32     1    16     0     8    0
ipq         40       52    0       52    17    17     0     1     0     8    0
ipqe        40      116    0      116    17    17     0     1     0     8    0
inpcb      280    12054    0    12045    55    53     2    10     0     8    1
rttmr       72       13    0       12     4     3     1     1     0     8    0
ip6q        72        1    0        1     1     1     0     1     0     8    0
nd6         48       73    0       71     8     7     1     1     0     8    0
pkpcb       40       24    0       24     7     7     0     1     0     8    0
swfcl       56        4    0        0     1     0     1     1     0     8    0
ppxss      1128     126    0      126    38    37     1     1     0     8    1
art_heap8  4096      39    0       37    26    24     2     4     0     8    0
art_heap4  256     2600    0     2371    48    33    15    19     0     8    0
art_table   32     2639    0     2408     6     4     2     3     0     8    0
art_node    16      567    0      531     1     0     1     1     0     8    0
sysvmsgpl   40       27    0       27     2     2     0     1     0     8    0
semupl     112        2    0        2     2     2     0     1     0     8    0
semapl     112     2544    0     2534     1     0     1     1     0     8    0
shmpl      112      144    0       16     4     0     4     4     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino1pl    128    14198    0    12801    46     0    46    46     0     8    0
ffsino     240    14198    0    12801    83     0    83    83     0     8    0
nchpl      144    26669    0    25052    61     0    61    61     0     8    0
uvmvnodes   72     8848    0        0   161     0   161   161     0     8    0
vnodes     208     8848    0        0   466     0   466   466     0     8    0
namei      1024   88230    0    88229     3     2     1     1     0     8    0
vmpool     520       26    0       26    11    11     0     1     0     8    0
scsiplug    64        8    0        8     6     6     0     1     0     8    0
scxspl     192    89297    0    89297    53    49     4     7     0     8    4
plimitpl   152      758    0      751     1     0     1     1     0     8    0
sigapl     432     7885    0     7872     2     0     2     2     0     8    0
futexpl     56   226084    0   226084     2     1     1     1     0     8    1
knotepl    112     1638    0     1619     4     3     1     2     0     8    0
kqueuepl   104     1954    0     1952     7     6     1     4     0     8    0
pipepl     112     3228    0     3209    15    13     2     2     0     8    1
fdescpl    424     7886    0     7872     2     0     2     2     0     8    0
filepl     120    75363    0    75266    60    55     5    11     0     8    2
lockfpl    104     2324    0     2323     1     0     1     1     0     8    0
lockfspl    48      817    0      816     1     0     1     1     0     8    0
sessionpl  112       52    0       42     1     0     1     1     0     8    0
pgrppl      48       90    0       80     1     0     1     1     0     8    0
ucredpl     96     6307    0     6300     1     0     1     1     0     8    0
zombiepl   144     7877    0     7877     3     2     1     1     0     8    1
processpl  864     7907    0     7877     4     0     4     4     0     8    0
procpl     632    19060    0    19022    19    15     4     5     0     8    0
sosppl     128     2379    0     2379     7     6     1     1     0     8    1
sockpl     384    30483    0    30444   125   118     7    15     0     8    2
mcl64k     65536   2971    0     2971   265   264     1    64     0     8    1
mcl16k     16384    112    0      112    33    32     1     1     0     8    1
mcl12k     12288    234    0      234    31    30     1     1     0     8    1
mcl9k      9216     208    0      208    36    35     1     1     0     8    1
mcl8k      8192    1046    0     1046    17    16     1     1     0     8    1
mcl4k      4096    1197    0     1197     9     8     1     1     0     8    1
mcl2k2     2112      59    0       59    26    26     0     1     0     8    0
mcl2k      2048   67920    0    67878    43    36     7    15     0     8    1
mtagpl      80      339    0      335     7     6     1     1     0     8    0
mbufpl     256   185413    0   185327   182   171    11    40     0     8    1
bufpl      256    39595    0    30734   555     0   555   555     0     8    0
anonpl      16   880550    0   866379   321   250    71    81     0    62    2
amapchunkpl 152   44774    0    44670   150   132    18    18     0   158   12
amappl16   192    44106    0    43209   352   306    46    58     0     8    0
amappl15   184     3103    0     3103     8     8     0     1     0     8    0
amappl14   176      634    0      631     2     1     1     1     0     8    0
amappl13   168     1658    0     1658     4     4     0     1     0     8    0
amappl12   160      921    0      919     2     1     1     1     0     8    0
amappl11   152     2027    0     2016     1     0     1     1     0     8    0
amappl10   144      260    0      257     1     0     1     1     0     8    0
amappl9    136     1523    0     1516     1     0     1     1     0     8    0
amappl8    128     1070    0     1027     2     0     2     2     0     8    0
amappl7    120      386    0      378     1     0     1     1     0     8    0
amappl6    112     1959    0     1943     1     0     1     1     0     8    0
amappl5    104     1386    0     1376     1     0     1     1     0     8    0
amappl4     96     9324    0     9296     1     0     1     1     0     8    0
amappl3     88      808    0      803     1     0     1     1     0     8    0
amappl2     80    63051    0    62982     4     2     2     3     0     8    0
amappl1     72   155605    0   155199    28    19     9    20     0     8    0
amappl      80    20509    0    20474     1     0     1     1     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      145    0       16     3     0     3     3     0     8    0
uaddrrnd    24     7912    0     7872     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     7912    0     7872     1     0     1     1     0     8    0
vmmpekpl   168    51251    0    51223     2     0     2     2     0     8    0
vmmpepl    168   950899    0   948936   620   500   120   126     0   357   26
vmsppl     272     7885    0     7872     6     5     1     2     0     8    0
pdppl      4096   15830    0    15796     6     1     5     6     0     8    0
pvpl        32  2427032    0  2409728   723   539   184   271     0   265   25
pmappl     200     7911    0     7898     1     0     1     1     0     8    0
extentpl    40       41    0       26     1     0     1     1     0     8    0
phpool     112     1314    0      626    23     2    21    23     0     8    0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/27 10:34 openbsd 07be18166ab7 2f1548bc .config console log report ci-openbsd-main
* Struck through repros no longer work on HEAD.