syzbot


uvm_fault: x86_ipi_db (2)

Status: closed as invalid on 2021/01/29 06:54
Reported-by: syzbot+a7b63ef1a505a81751e7@syzkaller.appspotmail.com
First crash: 1204d, last: 1204d
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd uvm_fault: x86_ipi_db (3) 4 1154d 1171d 0/3 auto-closed as invalid on 2021/05/25 04:20
openbsd uvm_fault: x86_ipi_db (6) 1 970d 970d 0/3 closed as invalid on 2021/08/26 17:38
openbsd uvm_fault: x86_ipi_db (8) 179 7h06m 794d 0/3 upstream: reported on 2022/02/19 02:28
openbsd uvm_fault: x86_ipi_db (5) 1 975d 975d 0/3 closed as invalid on 2021/08/23 05:23
openbsd uvm_fault: x86_ipi_db (7) 4 845d 845d 3/3 fixed on 2021/12/30 22:14
openbsd uvm_fault: x86_ipi_db 1 1207d 1207d 0/3 closed as invalid on 2021/01/03 08:45
openbsd uvm_fault: x86_ipi_db (4) 1 989d 989d 0/3 closed as invalid on 2021/08/08 05:33

Sample crash report:
uvm_fault(fffffd8064cc8758,20119000,2,3) at uvm_fault+0x176 sys/uvm/uvm_fault.c:946
uvm_fault_wire(fffffd8064cc8758,20119000,2011c000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1386
uvm_map_pageable_wire(fffffd8064cc8758,fffffd806b83d7e8,fffffd806b1726d0,3e6,ffffffff816079fe,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367
sys_mlock(ffff80002123d260,ffff80002129afe8,ffff80002129b030) at sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
syscall(ffff80002129b0b0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002129b0b0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x99def222790, count: -14
ddb{0}> show registers
rdi                              0x3
rsi                          0x40000    acpi_pdirpa+0x2be68
rbp               0xffff80002129a880
rbx                              0x3
rdx               0xffff800000ac7e80
rcx                              0x3
rax                          0x3ffff    acpi_pdirpa+0x2be67
r8                0xffffffff8160568f    witness_checkorder+0x101f
r9                               0x5
r10               0xda78f6142eee7720
r11               0x5a7bed5a558eb8e7
r12               0xffffffff82818f80    w_lodata+0x542d0
r13               0xfffffd806ed933c8
r14               0xffffffff82805550    w_lodata+0x408a0
r15               0xfffffd8002cd3540
rip               0xffffffff81ce8318    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff80002129a870
ss                              0x10
db_enter+0x18:  addq    $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.0) pid=370838 stat=onproc
    flags process=0 proc=4000000<THREAD>
    pri=32, usrpri=86, nice=20
    forw=0xffffffffffffffff, list=0xffff80002123ca80,0xffffffff828c87f8
    process=0xffff800021236190 user=0xffff800021296000, vmspace=0xfffffd8064cc8758
    estcpu=36, cpticks=0, pctcpu=0.0
    user=0, sys=0, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 93617  387145  38991      0  7           0                syz-executor.0
*93617  370838  38991      0  7   0x4000000                syz-executor.0
 45593  278822  63183      0  3        0x82  nanoslp       syz-executor.1
 69023  125437      0      0  3     0x14200  acct          acct
 38991  163096  63183      0  3        0x82  nanoslp       syz-executor.0
  1556  500035      0      0  3     0x14200  bored         sosplice
 63183  116328  14280      0  3        0x82  thrsleep      syz-fuzzer
 63183  113282  14280      0  3   0x4000082  nanoslp       syz-fuzzer
 63183   35568  14280      0  3   0x4000082  kqread        syz-fuzzer
 63183  334156  14280      0  3   0x4000082  thrsleep      syz-fuzzer
 63183  100711  14280      0  3   0x4000082  thrsleep      syz-fuzzer
 63183   92840  14280      0  3   0x4000082  thrsleep      syz-fuzzer
 63183  445985  14280      0  3   0x4000082  thrsleep      syz-fuzzer
 63183    7821  14280      0  3   0x4000082  thrsleep      syz-fuzzer
 14280  391933  14656      0  3    0x10008a  sigsusp       ksh
 14656  258640  51669      0  3        0x92  kqread        sshd
 49592  311390      1      0  3    0x100083  ttyin         getty
 51669   83774      1      0  3        0x80  kqread        sshd
 93609   74527  78879     74  3    0x100092  bpf           pflogd
 78879  483825      1      0  3        0x80  netio         pflogd
 31468  120852  55270     73  3    0x100090  kqread        syslogd
 55270   97736      1      0  3    0x100082  netio         syslogd
 79676  267125      1     77  3    0x100090  poll          dhclient
 59384  437046      1      0  3        0x80  poll          dhclient
 41736   96567      0      0  3     0x14200  bored         smr
 48518   78437      0      0  3     0x14200  pgzero        zerothread
 88644    9212      0      0  3     0x14200  aiodoned      aiodoned
 58893   52607      0      0  3     0x14200  syncer        update
 26361  206298      0      0  3     0x14200  cleaner       cleaner
 61698  280607      0      0  3     0x14200  reaper        reaper
 98609  246001      0      0  3     0x14200  pgdaemon      pagedaemon
 38463  420185      0      0  3     0x14200  bored         crynlk
 23830    2464      0      0  3     0x14200  bored         crypto
 28265  326635      0      0  3     0x14200  bored         viomb
 31514   67522      0      0  3  0x40014200  acpi0         acpi0
 24925  154290      0      0  3  0x40014200                idle1
 91747  119673      0      0  3     0x14200  bored         softnet
 70761  460622      0      0  3     0x14200  bored         systqmp
 19316  391151      0      0  3     0x14200  bored         systq
  9649    7134      0      0  3  0x40014200  bored         softclock
 67357  498493      0      0  3  0x40014200                idle0
     1  394488      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
Process 93617 (syz-executor.0) thread 0xffff80002123d260 (370838)
shared rwlock vmmaplk r = 0 (0xfffffd8064cc8770)
#0  witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1  rw_enter+0x446 sys/kern/kern_rwlock.c:311
#2  vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5463
#3  uvm_map_pageable+0x120 sys/uvm/uvm_map.c:2463
#4  sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
#5  syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5  syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
#6  Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828c8a10)
#0  witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4b0 sys/kern/subr_witness.c:1176
#1  syscall+0x3fd mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1  syscall+0x3fd sys/arch/amd64/amd64/trap.c:590
#2  Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf  9565   6452K    7222K  78643K     21367        0
            pcb    13      8K       8K  78643K       515        0
         rtable    83      3K       5K  78643K      1286        0
         ifaddr    86     15K      16K  78643K       370        0
         sysctl     2      0K       0K  78643K         2        0
       counters    44     34K      34K  78643K       134        0
       ioctlops     0      0K       4K  78643K      1809        0
            iov     0      0K      24K  78643K       288        0
          mount     1      1K       1K  78643K         1        0
         vnodes  1233     78K      78K  78643K      5093        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       9K  78643K        46        0
         VM map     2      1K       1K  78643K         2        0
            sem    12      0K       0K  78643K       581        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1697    195K     286K  78643K     12598        0
      file desc     5     13K      25K  78643K     11201        0
          sigio     0      0K       0K  78643K        32        0
           proc    62     63K      95K  78643K       972        0
        subproc    32      2K       2K  78643K       157        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
    ip_moptions     0      0K       0K  78643K       548        0
       in_multi    26      1K       2K  78643K       522        0
    ether_multi     1      0K       0K  78643K        94        0
            mrt     0      0K       0K  78643K        51        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys    67    307K     307K  78643K        67        0
           exec     0      0K       2K  78643K       839        0
     pfkey data     0      0K       0K  78643K         5        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   319    621K     621K  78643K     27359        0
       UVM aobj   100      3K       3K  78643K       109        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
    ip6_options     0      0K       0K  78643K       503        0
            NDP    16      0K       0K  78643K       118        0
           temp   147   3981K    4616K  78643K     44310        0
         kqueue     5      8K      16K  78643K       291        0
      SYN cache     2     16K      16K  78643K         2        0
ddb{0}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp         64       20    0       14     1     0     1     1     0     8    0
plcache    128       20    0        0     1     0     1     1     0     8    0
rtpcb      120      222    0      220     1     0     1     1     0     8    0
rtentry    112      246    0      215     2     0     2     2     0     8    0
unpcb      120     1722    0     1698     3     2     1     2     0     8    0
syncache   296       53    0       53     8     8     0     1     0     8    0
tcpqe       32       23    0       23     4     4     0     1     0     8    0
tcpcb      736     1234    0     1227    20    18     2     4     0     8    0
inpcb      296     3540    0     3532     9     8     1     2     0     8    0
rttmr       72       10    0       10     2     2     0     1     0     8    0
nd6         48       67    0       62     1     0     1     1     0     8    0
pkpcb       40       20    0       20     5     5     0     1     0     8    0
kcovpl      48        9    0        7     1     0     1     1     0     8    0
ppxss      1128       6    0        6     3     3     0     1     0     8    0
pffrag     232       15    0       15     4     4     0     1     0   482    0
pffrnode    88       15    0       15     4     4     0     1     0     8    0
pffrent     40      218    0      218     6     6     0     1     0     8    0
pfosfp      40     1428    0     1005     5     0     5     5     0     8    0
pfosfpen   112     1428    0      714    21     0    21    21     0     8    0
pfrktable  1344      42    0       42     2     2     0     1     0     8    0
pftag       88        2    0        0     1     0     1     1     0     8    0
pfstitem    24      115    0      108     1     0     1     1     0     8    0
pfstkey    112      115    0      108     1     0     1     1     0     8    0
pfstate    328      115    0      108     5     2     3     3     0     8    0
pfrule     1360     129    0      103     4     1     3     3     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256     1057    0      902    16     5    11    13     0     8    0
art_table   32     1058    0      902     2     0     2     2     0     8    0
art_node    16      244    0      218     1     0     1     1     0     8    0
sysvmsgpl   40       76    0       36     2     1     1     1     0     8    0
semupl     112        5    0        5     1     1     0     1     0     8    0
semapl     112      579    0      569     1     0     1     1     0     8    0
shmpl      112      106    0       10     4     1     3     3     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256    14444    0    13023    90     1    89    89     0     8    0
ffsino     272    14444    0    13023    95     0    95    95     0     8    0
nchpl      144    26873    0    25285    60     0    60    60     0     8    0
uvmvnodes   72     5926    0        0   108     0   108   108     0     8    0
vnodes     224     5926    0        0   349     0   349   349     0     8    0
namei      1024   66116    0    66116     2     1     1     1     0     8    1
percpumem   16       78    0       45     1     0     1     1     0     8    0
vcpupl     1984      44    0        0     6     0     6     6     0     8    0
vmpool     560       60    0       16     5     1     4     4     0     8    0
pfiaddrpl  120       14    0       14     2     2     0     1     0     8    0
scsiplug    72        2    0        2     1     1     0     1     0     8    0
scxspl     216    80657    0    80657    20    19     1     8     0     8    1
plimitpl   152      434    0      426     1     0     1     1     0     8    0
sigapl     424    11400    0    11366     4     0     4     4     0     8    0
futexpl     56    71639    0    71639     2     1     1     1     0     8    1
knotepl    112   104576    0   104550     4     3     1     2     0     8    0
kqueuepl   168     6203    0     6198     1     0     1     1     0     8    0
pipepl     336      408    0      397    13    11     2     3     0     8    0
fdescpl    496    11380    0    11364     3     0     3     3     0     8    0
filepl     152    33957    0    33853    11     6     5     7     0     8    1
lockfpl    104      894    0      893     1     0     1     1     0     8    0
lockfspl    48      345    0      344     1     0     1     1     0     8    0
sessionpl  144       25    0       14     1     0     1     1     0     8    0
pgrppl      48       60    0       49     1     0     1     1     0     8    0
ucredpl     96     3662    0     3653     1     0     1     1     0     8    0
zombiepl   144    11366    0    11365     2     1     1     1     0     8    0
processpl  1072   11400    0    11365     3     0     3     3     0     8    0
procpl     672    25536    0    25493     8     4     4     5     0     8    0
sosppl     168       55    0       55     7     7     0     1     0     8    0
sockpl     432     5544    0     5510    14     9     5     8     0     8    0
mcl64k     65536     18    0        0     3     0     3     3     0     8    0
mcl16k     16384     15    0        0     2     0     2     2     0     8    0
mcl12k     12288     25    0        0     2     0     2     2     0     8    0
mcl9k      9216      19    0        0     2     0     2     2     0     8    0
mcl8k      8192      17    0        0     3     0     3     3     0     8    0
mcl4k      4096      17    0        0     3     0     3     3     0     8    0
mcl2k2     2112       4    0        0     1     0     1     1     0     8    0
mcl2k      2048     314    0        0    18     0    18    18     0     8    0
mtagpl      96      379    0        0     8     0     8     8     0     8    0
mbufpl     256     1021    0        0    57     0    57    57     0     8    0
bufpl      280    19847    0    13598   447     0   447   447     0     8    0
anonpl      16   761459    0   750939    84    30    54    59     0   124   11
amapchunkpl 152   41908    0    41647    34    23    11    25     0   158    0
amappl16   192    35045    0    34626    48    24    24    33     0     8    2
amappl15   184     1570    0     1569     1     0     1     1     0     8    0
amappl14   176      135    0      129     1     0     1     1     0     8    0
amappl13   168     1615    0     1612     1     0     1     1     0     8    0
amappl12   160      333    0      332     1     0     1     1     0     8    0
amappl11   152       87    0       70     1     0     1     1     0     8    0
amappl10   144     2042    0     2037     1     0     1     1     0     8    0
amappl9    136     3300    0     3298     2     1     1     1     0     8    0
amappl8    128      392    0      272     4     0     4     4     0     8    0
amappl7    120     3353    0     3344     1     0     1     1     0     8    0
amappl6    112     2136    0     2114     1     0     1     1     0     8    0
amappl5    104    10812    0    10794     1     0     1     1     0     8    0
amappl4     96      669    0      635     1     0     1     1     0     8    0
amappl3     88     2314    0     2306     1     0     1     1     0     8    0
amappl2     80    90518    0    90421     3     0     3     3     0     8    0
amappl1     72   330176    0   329699    26    16    10    19     0     8    0
amappl      80    26033    0    25909     3     0     3     3     0    84    0
dma4096    4096       1    0        1     1     1     0     1     0     8    0
dma1024    1024       1    0        0     1     0     1     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      108    0        9     2     0     2     2     0     8    0
uaddrrnd    24    11440    0    11380     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24    11440    0    11380     1     0     1     1     0     8    0
vmmpekpl   168    54491    0    54452     2     0     2     2     0     8    0
vmmpepl    168  1419206    0  1417352   155    56    99    99     0   357   12
vmsppl     368    11439    0    11380     6     0     6     6     0     8    0
pdppl      4096   22887    0    22804   105    20    85    85     0     8    2
pvpl        32  4239539    0  4226582   233    96   137   142     0   265   30
pmappl     232    11439    0    11380     5     1     4     4     0     8    0
extentpl    40       58    0       40     1     0     1     1     0     8    0
phpool     112      444    0       59    12     0    12    12     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
witness_checkorder(fffffd806ed933c8,9,0) at witness_checkorder+0x1049
rw_enter(fffffd806ed933b8,81) at rw_enter+0xd4
rrw_enter(fffffd806ed933b8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:462
VOP_LOCK(fffffd8069ecacc0,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614
vn_lock(fffffd8069ecacc0,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575
uvn_get(fffffd806a41d208,119000,ffff80002129ac28,ffff80002129ac14,0,1) at uvn_get+0x276 uvm_vnode_lock sys/uvm/uvm_vnode.c:1499 [inline]
uvn_get(fffffd806a41d208,119000,ffff80002129ac28,ffff80002129ac14,0,1) at uvn_get+0x276 sys/uvm/uvm_vnode.c:993
uvm_fault_lower(ffff80002129adc8,ffff80002129ada0,ffff80002129aca0,2,3) at uvm_fault_lower+0x6ff sys/uvm/uvm_fault.c:1116
uvm_fault(fffffd8064cc8758,20119000,2,3) at uvm_fault+0x176 sys/uvm/uvm_fault.c:946
uvm_fault_wire(fffffd8064cc8758,20119000,2011c000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1386
uvm_map_pageable_wire(fffffd8064cc8758,fffffd806b83d7e8,fffffd806b1726d0,3e6,ffffffff816079fe,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367
sys_mlock(ffff80002123d260,ffff80002129afe8,ffff80002129b030) at sys_mlock+0x180 sys/uvm/uvm_mmap.c:772
syscall(ffff80002129b0b0) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002129b0b0) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x99def222790, count: -14
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x1a:        addq    $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020d68ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff828c8808) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff828c8808) at __mp_lock+0x122 sys/kern/kern_lock.c:147
sleep_setup(ffff8000222d5a30,ffffffff82849450,120,ffffffff823a2ad2) at sleep_setup+0xcf sys/kern/kern_synch.c:382
tsleep(ffffffff82849450,120,ffffffff823a2ad2,2) at tsleep+0x113 sleep_setup_timeout sys/kern/kern_synch.c:444 [inline]
tsleep(ffffffff82849450,120,ffffffff823a2ad2,2) at tsleep+0x113 sys/kern/kern_synch.c:158
sys_nanosleep(ffff80002123ca80,ffff8000222d5b60,ffff8000222d5bb0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297
syscall(ffff8000222d5c30) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000222d5c30) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7fffffae60, count: -9

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/01/04 21:01 openbsd dfda3de3800a 2a28ff1f .config console log report ci-openbsd-multicore
* Struck through repros no longer work on HEAD.