syzbot


kernel: privileged instruction fault trap, code=0 (2)

Status: auto-closed as invalid on 2020/07/29 08:00
Reported-by: syzbot+4ae59f9ae6a39724d576@syzkaller.appspotmail.com
First crash: 1666d, last: 1666d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd kernel: privileged instruction fault trap, code=0 1 1770d 1770d 0/3 auto-closed as invalid on 2020/04/16 01:44

Sample crash report:
login: kernel: privileged instruction fault trap, code=0
Stopped at      vmptrld+0xb:    rdrand  0(%rdi)
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
vmptrld() at vmptrld+0xb
vm_create(ffff800000a24000,ffff800020ec7398) at vm_create+0x304 vcpu_init sys/arch/amd64/amd64/vmm.c:3586 [inline]
vm_create(ffff800000a24000,ffff800020ec7398) at vm_create+0x304 sys/arch/amd64/amd64/vmm.c:1482
VOP_IOCTL(fffffd806e331dd0,c5005601,ffff800000a24000,1,fffffd807f7bf6c0,ffff800020ec7398) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290
vn_ioctl(fffffd806787b6a0,c5005601,ffff800000a24000,ffff800020ec7398) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800020ec7398,ffff800021fad928,ffff800021fad970) at sys_ioctl+0x4a5
syscall(ffff800021fad9f0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021fad9f0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1a10cc09b60, count: -7
ddb{0}> show registers
rdi               0xffff800021f9b1d0
rsi                              0x1
rbp               0xffff800021fad5e0
rbx               0xffff800021f9ae80
rdx                           0x1d72    __ALIGN_SIZE+0xd72
rcx                       0x11e57ed0    __kernel_phys_end+0xf657ed0
rax               0xfffffd8067430000
r8                                 0
r9                                 0
r10                              0x4
r11               0x6af430a6764f86fe
r12                              0x1
r13                                0
r14               0xffff800021f9ae80
r15               0xffff800021f9b1d0
rip               0xffffffff81ed6bd1    vmptrld+0xb
cs                               0x8
rflags                       0x10202    __ALIGN_SIZE+0xf202
rsp               0xffff800021fad5a8
ss                              0x10
vmptrld+0xb:    rdrand  0(%rdi)
ddb{0}> show proc
PROC (syz-executor.1) pid=118511 stat=onproc
    flags process=0 proc=4000000<THREAD>
    pri=32, usrpri=86, nice=20
    forw=0xffffffffffffffff, list=0xffff800020ec69d8,0xffffffff826651b0
    process=0xffff800020e92ba8 user=0xffff800021fa8000, vmspace=0xfffffd807efff8a0
    estcpu=36, cpticks=0, pctcpu=0.0
    user=0, sys=0, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
  2915  443207   3496      0  2           0                syz-executor.0
  2915  518512   3496      0  2   0x4000000                syz-executor.0
 37766  122856  56948      0  2           0                syz-executor.1
 37766   51196  56948      0  7   0x4000000                syz-executor.1
 37766  150058  56948      0  2   0x4000000                syz-executor.1
*37766  118511  56948      0  7   0x4000000                syz-executor.1
 56948  305118  95719      0  3        0x82  nanosleep     syz-executor.1
  3496  226227  95719      0  3        0x82  nanosleep     syz-executor.0
 95719  351991  75281      0  3        0x82  thrsleep      syz-fuzzer
 95719   98999  75281      0  3   0x4000082  thrsleep      syz-fuzzer
 95719  146555  75281      0  3   0x4000082  thrsleep      syz-fuzzer
 95719  476665  75281      0  3   0x4000082  thrsleep      syz-fuzzer
 95719  305254  75281      0  3   0x4000082  thrsleep      syz-fuzzer
 95719  213926  75281      0  3   0x4000082  thrsleep      syz-fuzzer
 95719  348176  75281      0  3   0x4000082  thrsleep      syz-fuzzer
 95719  264638  75281      0  3   0x4000082  thrsleep      syz-fuzzer
 95719  188328  75281      0  3   0x4000082  thrsleep      syz-fuzzer
 95719     887  75281      0  3   0x4000082  kqread        syz-fuzzer
 75281  411213   7864      0  3    0x10008a  pause         ksh
  7864   22545  25694      0  3        0x92  select        sshd
 30064  299968      1      0  3    0x100083  ttyin         getty
 25694  414801      1      0  3        0x80  select        sshd
  1785  340609  61323     74  3    0x100092  bpf           pflogd
 61323  403018      1      0  3        0x80  netio         pflogd
  1450  293152  15355     73  3    0x100090  kqread        syslogd
 15355   36774      1      0  3    0x100082  netio         syslogd
 50952  362876      1     77  3    0x100090  poll          dhclient
 57252  317612      1      0  3        0x80  poll          dhclient
 34947  479671      0      0  3     0x14200  bored         smr
 37045   48857      0      0  2     0x14200                zerothread
  9907  485166      0      0  3     0x14200  aiodoned      aiodoned
 57126  420408      0      0  3     0x14200  syncer        update
 37195   85384      0      0  3     0x14200  cleaner       cleaner
 33602  278872      0      0  3     0x14200  reaper        reaper
 63763  331115      0      0  3     0x14200  pgdaemon      pagedaemon
 41114  227894      0      0  3     0x14200  bored         crynlk
 49279  447287      0      0  3     0x14200  bored         crypto
 99354  404853      0      0  3  0x40014200  acpi0         acpi0
  8680  389459      0      0  3  0x40014200                idle1
 64691  128975      0      0  3     0x14200  bored         softnet
 95216  445743      0      0  3     0x14200  bored         systqmp
 40223  403005      0      0  3     0x14200  bored         systq
 81948  139631      0      0  3  0x40014200  bored         softclock
 95833  122301      0      0  3  0x40014200                idle0
     1  309675      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
Process 37766 (syz-executor.1) thread 0xffff800020ec7398 (118511)
exclusive rwlock vmlistlock r = 0 (0xffff800000678878)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2  vm_create+0x130 vm_impl_init sys/arch/amd64/amd64/vmm.c:1642 [inline]
#2  vm_create+0x130 sys/arch/amd64/amd64/vmm.c:1463
#3  VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290
#4  vn_ioctl+0xba sys/kern/vfs_vnops.c:531
#5  sys_ioctl+0x4a5
#6  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#6  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#7  Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8266f830)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2  mi_switch+0x392 sys/kern/sched_bsd.c:435
#3  sleep_finish+0x113 sys/kern/kern_synch.c:418
#4  rw_enter+0x3d6 sys/kern/kern_rwlock.c:287
#5  vm_create+0x130 vm_impl_init sys/arch/amd64/amd64/vmm.c:1642 [inline]
#5  vm_create+0x130 sys/arch/amd64/amd64/vmm.c:1463
#6  VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290
#7  vn_ioctl+0xba sys/kern/vfs_vnops.c:531
#8  sys_ioctl+0x4a5
#9  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#10 Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf  9475   6398K    6722K  78643K     10638        0
            pcb    13      8K       8K  78643K        23        0
         rtable   109      3K       3K  78643K       207        0
         ifaddr    45     10K      10K  78643K        48        0
       counters    43     33K      33K  78643K        43        0
       ioctlops     1      2K       4K  78643K      1475        0
            iov     0      0K      24K  78643K         4        0
          mount     1      1K       1K  78643K         1        0
         vnodes  1223     77K      77K  78643K      1253        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       5K  78643K         3        0
         VM map     2      1K       1K  78643K         2        0
            sem    12      0K       0K  78643K        16        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1809    196K     290K  78643K     12766        0
      file desc     6     17K      25K  78643K        80        0
           proc    60     63K      95K  78643K       442        0
        subproc    32      2K       2K  78643K        34        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
       in_multi    33      2K       2K  78643K        33        0
    ether_multi     1      0K       0K  78643K         1        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys    49    228K     228K  78643K        49        0
           exec     0      0K       1K  78643K       218        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   147     40K      40K  78643K      1194        0
       UVM aobj     4      2K       2K  78643K         6        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
            NDP     6      0K       0K  78643K        10        0
           temp    67   3036K    3116K  78643K      6150        0
         kqueue     3      4K       5K  78643K         7        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        7    0        0     1     0     1     1     0     8    0
plcache    128       20    0        0     1     0     1     1     0     8    0
rtpcb       80       19    0       17     1     0     1     1     0     8    0
rtentry    112       48    0        2     2     0     2     2     0     8    0
unpcb      120       47    0       37     1     0     1     1     0     8    0
syncache   264        4    0        4     1     1     0     1     0     8    0
tcpqe       32      103    0      103     1     0     1     1     0     8    1
tcpcb      544       16    0       12     1     0     1     1     0     8    0
inpcb      280      146    0      139     2     0     2     2     0     8    1
nd6         48        6    0        0     1     0     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       14    0        0     1     0     1     1     0     8    0
pfstkey    112       14    0        0     1     0     1     1     0     8    0
pfstate    328       14    0        0     2     0     2     2     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      195    0        0    13     0    13    13     0     8    0
art_table   32      196    0        0     2     0     2     2     0     8    0
art_node    16       47    0        6     1     0     1     1     0     8    0
semupl     112        2    0        2     1     0     1     1     0     8    1
semapl     112       12    0        2     1     0     1     1     0     8    0
shmpl      112        4    0        2     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1494    0       86    89     0    89    89     0     8    0
ffsino     272     1494    0       86    95     0    95    95     0     8    0
nchpl      144     1785    0      178    60     0    60    60     0     8    0
uvmvnodes   72     1556    0        0    29     0    29    29     0     8    0
vnodes     208     1556    0        0    82     0    82    82     0     8    0
namei      1024    4735    0     4735     1     0     1     1     0     8    1
percpumem   16       32    0        0     1     0     1     1     0     8    0
vcpupl     1984       2    0        1     1     0     1     1     0     8    0
vmpool     560        2    0        1     1     0     1     1     0     8    0
scxspl     192     4532    0     4532     4     1     3     3     0     8    3
plimitpl   152       19    0       11     1     0     1     1     0     8    0
sigapl     424      295    0      263     4     0     4     4     0     8    0
futexpl     56      777    0      777     1     0     1     1     0     8    1
knotepl    112       63    0       44     1     0     1     1     0     8    0
kqueuepl   144        6    0        4     1     0     1     1     0     8    0
pipelkpl    48       82    0       72     1     0     1     1     0     8    0
pipepl     120      164    0      145     1     0     1     1     0     8    0
fdescpl    496      280    0      263     3     0     3     3     0     8    0
filepl     152     1519    0     1417     5     0     5     5     0     8    1
lockfpl    104       13    0       12     1     0     1     1     0     8    0
lockfspl    48        7    0        6     1     0     1     1     0     8    0
sessionpl  112       18    0        7     1     0     1     1     0     8    0
pgrppl      48       18    0        7     1     0     1     1     0     8    0
ucredpl     96      145    0      136     1     0     1     1     0     8    0
zombiepl   144      263    0      263     1     0     1     1     0     8    1
processpl  984      295    0      263     5     0     5     5     0     8    0
procpl     624      407    0      362     4     0     4     4     0     8    0
sockpl     400      212    0      193     3     0     3     3     0     8    1
mcl64k     65536      1    0        0     1     0     1     1     0     8    0
mcl12k     12288      2    0        0     1     0     1     1     0     8    0
mcl8k      8192       1    0        0     1     0     1     1     0     8    0
mcl4k      4096       2    0        0     1     0     1     1     0     8    0
mcl2k      2048     205    0        0    25     0    25    25     0     8    0
mtagpl      80        2    0        0     1     0     1     1     0     8    0
mbufpl     256      229    0        0    14     0    14    14     0     8    0
bufpl      280     3443    0      145   236     0   236   236     0     8    0
anonpl      16    39599    0    25436    59     1    58    58     0   124    0
amapchunkpl 152    1235    0     1093     8     0     8     8     0   158    2
amappl16   192     1025    0      279    38     0    38    38     0     8    0
amappl15   184        3    0        1     1     0     1     1     0     8    0
amappl14   176       68    0       63     1     0     1     1     0     8    0
amappl13   168       73    0       68     1     0     1     1     0     8    0
amappl12   160        4    0        2     2     1     1     1     0     8    0
amappl11   152       51    0       36     1     0     1     1     0     8    0
amappl10   144       23    0       15     1     0     1     1     0     8    0
amappl9    136      369    0      366     1     0     1     1     0     8    0
amappl8    128      361    0      321     2     0     2     2     0     8    0
amappl7    120      121    0      108     1     0     1     1     0     8    0
amappl6    112       32    0       23     1     0     1     1     0     8    0
amappl5    104      179    0      163     1     0     1     1     0     8    0
amappl4     96      480    0      451     1     0     1     1     0     8    0
amappl3     88      112    0      101     1     0     1     1     0     8    0
amappl2     80     1362    0     1272     2     0     2     2     0     8    0
amappl1     72    17136    0    16570    23     9    14    18     0     8    3
amappl      80      655    0      605     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       18    0       17     1     0     1     1     0     8    0
aobjpl      64        5    0        2     1     0     1     1     0     8    0
uaddrrnd    24      282    0      264     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      282    0      264     1     0     1     1     0     8    0
vmmpekpl   168     8243    0     8207     2     0     2     2     0     8    0
vmmpepl    168    45170    0    42875   116     5   111   111     0   357   11
vmsppl     368      281    0      264     2     0     2     2     0     8    0
pdppl      4096     572    0      529     6     0     6     6     0     8    0
pvpl        32   153912    0   135712   152     0   152   152     0   265    5
pmappl     232      281    0      264     2     0     2     2     0     8    0
extentpl    40       46    0       29     1     0     1     1     0     8    0
phpool     112      264    0        3     8     0     8     8     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
vmptrld() at vmptrld+0xb
vm_create(ffff800000a24000,ffff800020ec7398) at vm_create+0x304 vcpu_init sys/arch/amd64/amd64/vmm.c:3586 [inline]
vm_create(ffff800000a24000,ffff800020ec7398) at vm_create+0x304 sys/arch/amd64/amd64/vmm.c:1482
VOP_IOCTL(fffffd806e331dd0,c5005601,ffff800000a24000,1,fffffd807f7bf6c0,ffff800020ec7398) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290
vn_ioctl(fffffd806787b6a0,c5005601,ffff800000a24000,ffff800020ec7398) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531
sys_ioctl(ffff800020ec7398,ffff800021fad928,ffff800021fad970) at sys_ioctl+0x4a5
syscall(ffff800021fad9f0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021fad9f0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1a10cc09b60, count: -7
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x1a:        addq    $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
__mp_lock(ffffffff8266f628) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff8266f628) at __mp_lock+0x127 sys/kern/kern_lock.c:147
sys_futex(ffff800020ec6c48,ffff800021f90ee0,ffff800021f90f30) at sys_futex+0xf6 sys/kern/sys_futex.c:109
syscall(ffff800021f90fb0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800021f90fb0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1a13f1b5f10, count: -7

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/04/30 08:00 openbsd 577c7898896a 2dd552a5 .config console log report ci-openbsd-multicore
* Struck through repros no longer work on HEAD.