syzbot

uvm_fault(0xfffff9806ca9de70, 0x70, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      dovutimens+0x368:       movl    0x70(%rax),%r12d
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*364833  23640      0           0  0x4000000    0  syz-executor
dovutimens(ffff80003c8fafb0,fffff9806ca855e8,ffff80003c8f9ac0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690
sys_futimens(ffff80003c8fafb0,ffff80003c8f9c00,ffff80003c8f9b50) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2766
syscall(ffff80003c8f9c00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f9c00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7bd8f825d50, 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> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: uvm_fault(0xfffff9806ca9de70, 0x70, 0, 1) -> e
ddb> trace
dovutimens(ffff80003c8fafb0,fffff9806ca855e8,ffff80003c8f9ac0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690
sys_futimens(ffff80003c8fafb0,ffff80003c8f9c00,ffff80003c8f9b50) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2766
syscall(ffff80003c8f9c00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f9c00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7bd8f825d50, count: -4
ddb> show registers
rdi               0xffff80003a4d0000
rsi                             0x40
rbp               0xffff80003c8f9ab0
rbx                             0xff
rdx               0xffff80003a4d0000
rcx                             0x3f
rax                                0
r8                    0x7f7fffffc000
r9                                 0
r10               0xfad37bcaf7adc4a3
r11               0x22c2999979aaeb97
r12               0xffff80003c8f9ac0
r13                           0xb421    __ALIGN_SIZE+0xa421
r14               0xfffff9806ca855e8
r15               0xffff80003c8fafb0
rip               0xffffffff820da2e8    dovutimens+0x368
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80003c8f99b0
ss                              0x10
dovutimens+0x368:       movl    0x70(%rax),%r12d
ddb> show proc
PROC (syz-executor) tid=364833 pid=23640 tcnt=2 stat=onproc
    flags process=0 proc=4000000<THREAD>
    runpri=32, usrpri=50, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff80003c8faa80,0xffffffff83a765d8
    process=0xffff8000ffff9218 user=0xffff80003c8f4000, vmspace=0xfffff9806ca9de70
    estcpu=9, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 23640  223793  78256      0  2           0                syz-executor
*23640  364833  78256      0  7   0x4000000                syz-executor
 49898  451582  21316      0  2           0                syz-executor
 50941  234637  68507      0  2         0x2                ndp
 67204  479877  44327      0  2         0x2                ndp
 33210  371256  96083      0  2           0                syz-executor
 33210  339387  96083      0  3   0x4000080  fsleep        syz-executor
 28291  333496  93446      0  2         0x2                ndp
 44327  453867  75225      0  3    0x10008a  sigsusp       sh
 68507  251937  50002      0  3    0x10008a  sigsusp       sh
 93446  298806  72668      0  3    0x10008a  sigsusp       sh
 89812   40868   9319      0  2           0                syz-executor
 89812  309203   9319      0  3   0x4000080  fsleep        syz-executor
 89812   25554   9319      0  2   0x4000000                syz-executor
 21316  477179  29041      0  3        0x82  nanoslp       syz-executor
 78256  496081  29041      0  3        0x82  nanoslp       syz-executor
  9319   72226  29041      0  3        0x82  nanoslp       syz-executor
 50002  432687  29041      0  3        0x82  wait          syz-executor
 96083  143037  29041      0  3        0x82  nanoslp       syz-executor
 75225  166126  29041      0  3        0x82  wait          syz-executor
 72668   84634  29041      0  3        0x82  wait          syz-executor
 87237  508770  29041      0  3         0x2  biowait       syz-executor
 29041   85263  49235      0  3        0x82  kqread        syz-executor
 49235  195206  28481      0  3    0x10008a  sigsusp       ksh
 28481  134947  12776      0  3        0x98  kqread        sshd-session
 12776  358061  40037      0  3        0x92  kqread        sshd-session
 67301   78365      1      0  3    0x100083  ttyin         getty
 40037  211311      1      0  3        0x88  kqread        sshd
 92780  118865  25360     73  3   0x1100090  kqread        syslogd
 25360  389121      1      0  3    0x100082  sbwait        syslogd
 28238  245917      1      0  3    0x100080  kqread        resolvd
 60095  401875  35347     77  3    0x100092  kqread        dhcpleased
 42766  198793  35347     77  3    0x100092  kqread        dhcpleased
 35347  184396      1      0  3        0x80  kqread        dhcpleased
 53964   43233      0      0  3     0x14200  bored         smr
  2391  261569      0      0  2     0x14200                zerothread
 88889  344560      0      0  3     0x14200  aiodoned      aiodoned
 32620   91133      0      0  3     0x14200  syncer        update
 48457   52111      0      0  3     0x14200  cleaner       cleaner
 15639  304698      0      0  3     0x14200  reaper        reaper
 74067  406113      0      0  3     0x14200  pgdaemon      pagedaemon
 56509   35832      0      0  3     0x14200  bored         viomb
 88319  108114      0      0  3  0x40014200  acpi0         acpi0
 28235    8363      0      0  3     0x14200  bored         softnet0
 33836   25254      0      0  3     0x14200  smrbar        systqmp
 92062  218475      0      0  3     0x14200  bored         systq
 61575  190795      0      0  3  0x40014200  tmoslp        softclock
 97306  400239      0      0  3  0x40014200                idle0
     1  496198      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 11160  12237K   12237K 166960K     12244        0
            pcb    17     12K      12K 166960K        18        0
         rtable   231      6K       6K 166960K       335        0
             pf    30     12K      19K 166960K        44        0
         ifaddr    42      7K       7K 166960K        44        0
        ifgroup    50      2K       2K 166960K        50        0
         sysctl     1      1K       9K 166960K         5        0
       counters    33     17K      17K 166960K        33        0
       ioctlops     0      0K       2K 166960K        36        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1290     81K      81K 166960K      1357        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       1K 166960K         2        0
         VM map     2      1K       1K 166960K         2        0
            sem     2      0K       0K 166960K         2        0
        dirhash    12      2K       2K 166960K        12        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    20     73K      97K 166960K       139        0
           proc    57     58K     124K 166960K       495        0
        subproc    72      4K       4K 166960K        72        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
       in_multi    99      7K       7K 166960K        99        0
    ether_multi     1      0K       0K 166960K         1        0
            mrt     0      0K       0K 166960K         2        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys    25    122K     122K 166960K        25        0
           exec     0      0K       1K 166960K       365        0
   fusefs mount     1     32K      32K 166960K         1        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   206    161K     167K 166960K      2817        0
       UVM aobj     3      2K       2K 166960K         3        0
     pinsyscall    42     84K      96K 166960K      1237        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K         2        0
            NDP    27      2K       2K 166960K        27        0
           temp    34   9102K    9110K 166960K      5249        0
         kqueue    13     20K      22K 166960K        26        0
      SYN cache     2     16K      16K 166960K         2        0
ddb> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb      120       33    0       30     1     0     1     1     0     8    0
rtentry    136      108    0        1     4     0     4     4     0     8    0
unpcb      144       40    0       25     1     0     1     1     0     8    0
syncache   336        4    0        4     1     0     1     1     0     8    1
tcpcb      736        8    0        4     1     0     1     1     0     8    0
arp         96       18    0        0     1     0     1     1     0     8    0
inpcb      328       60    0       53     2     0     2     2     0     8    1
nd6        112       21    0        0     1     0     1     1     0     8    0
kcovpl      48        8    0        0     1     0     1     1     0     8    0
pfanchor   1288       2    0        0     1     0     1     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      449    0        0    29     0    29    29     0     8    0
art_table   40      450    0        0     5     0     5     5     0     8    0
art_node    32      108    0        5     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1559    0       99    92     0    92    92     0     8    0
ffsino     256     1559    0       99    92     0    92    92     0     8    0
nchpl      144     1757    0       68    63     0    63    63     0     8    0
vnodes     216     1644    0        0    92     0    92    92     0     8    0
namei      1024    5157    0     5156     2     0     2     2     0     8    1
kstatmem   264       23    0        0     2     0     2     2     0     8    0
scxspl     216     5951    0     5950     4     0     4     4     1     8    3
plimitpl   152       28    0       12     1     0     1     1     0     8    0
sigapl     424      434    0      389     6     0     6     6     0     8    0
knotepl    120     2493    0     2446     2     0     2     2     0     8    0
kqueuepl   184       22    0       13     1     0     1     1     0     8    0
pipepl     304      122    0       95     3     0     3     3     0     8    0
fdescpl    448      421    0      389     5     0     5     5     0     8    1
filepl     120     1435    0     1226     7     0     7     7     0     8    0
lockfpl    104        6    0        4     1     0     1     1     0     8    0
lockfspl    48        4    0        2     1     0     1     1     0     8    0
sessionpl  144       23    0       15     1     0     1     1     0     8    0
pgrppl      48       31    0       15     1     0     1     1     0     8    0
ucredpl    104       77    0       66     1     0     1     1     0     8    0
zombiepl   144      389    0      389     1     0     1     1     0     8    1
processpl  1152     434    0      389     4     0     4     4     0     8    0
procpl     664      449    0      400     5     0     5     5     0     8    0
sockpl     552      134    0      109     3     0     3     3     0     8    1
mcl64k     65536      1    0        1     1     0     1     1     0     8    1
mcl12k     12288      1    0        1     1     0     1     1     0     8    1
mcl8k      8192       4    0        4     1     0     1     1     0     8    1
mcl4k      4096    2490    0     2438    14     0    14    14     0     8    5
mcl2k      2048     113    0      112     1     0     1     1     0     8    0
mtagpl      96        4    0        4     1     0     1     1     0     8    1
mbufpl     256     4100    0     3962     9     0     9     9     0     8    0
bufpl      272     2238    0      102   143     0   143   143     0     8    0
anonpl      24    82757    0    79670    25     0    25    25     0   186    4
amapchunkpl 152    7626    0     7241    17     0    17    17     0   158    2
amappl16   200     1223    0     1211     4     0     4     4     0     8    3
amappl15   192        5    0        5     1     0     1     1     0     8    1
amappl14   184      407    0      403     1     0     1     1     0     8    0
amappl13   176      112    0      101     1     0     1     1     0     8    0
amappl12   168      681    0      653     2     0     2     2     0     8    0
amappl11   160       47    0       47     1     0     1     1     0     8    1
amappl10   152       55    0       45     1     0     1     1     0     8    0
amappl9    144      276    0      276     1     0     1     1     0     8    1
amappl8    136       94    0       93     1     0     1     1     0     8    0
amappl7    128      141    0      128     1     0     1     1     0     8    0
amappl6    120      204    0      200     1     0     1     1     0     8    0
amappl5    112      110    0      102     1     0     1     1     0     8    0
amappl4    104      252    0      237     1     0     1     1     0     8    0
amappl3     96     1393    0     1299     3     0     3     3     0     8    0
amappl2     88      520    0      462     2     0     2     2     0     8    0
amappl1     80    10195    0     9579    13     0    13    13     0     8    0
amappl      88     2143    0     2007     4     0     4     4     0    92    0
uvmvnodes   80       97    0        0     2     0     2     2     0     8    0
dma4096    4096       1    0        1     1     0     1     1     0     8    1
dma1024    1024       1    0        0     1     0     1     1     0     8    0
dma256     256        6    0        6     1     0     1     1     0     8    1
dma128     128      253    0      253     1     0     1     1     0     8    1
dma64       64        6    0        6     1     0     1     1     0     8    1
dma32       32        7    0        7     1     0     1     1     0     8    1
dma16       16       18    0       17     1     0     1     1     0     8    0
aobjpl      72        2    0        0     1     0     1     1     0     8    0
uaddrrnd    24      421    0      389     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      421    0      389     1     0     1     1     0     8    0
vmmpekpl   168     5309    0     5280     2     0     2     2     0     8    0
vmmpepl    168    36166    0    34406    79     0    79    79     0   357    2
vmsppl     368      420    0      389     4     0     4     4     0     8    0
rwobjpl     40    13621    0    12624    11     0    11    11     0     8    0
pdppl      4096     848    0      778    96    14    82    82     0     8   12
pvpl        32   202295    0   194305    81     0    81    81     0   265   13
pmappl     216      420    0      389     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      498    0       14    14     0    14    14     0     8    0
ddb> machine ddbcpu 0
No such command
ddb> trace
dovutimens(ffff80003c8fafb0,fffff9806ca855e8,ffff80003c8f9ac0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690
sys_futimens(ffff80003c8fafb0,ffff80003c8f9c00,ffff80003c8f9b50) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2766
syscall(ffff80003c8f9c00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f9c00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7bd8f825d50, count: -4
ddb> machine ddbcpu 1
No such command
ddb> trace
dovutimens(ffff80003c8fafb0,fffff9806ca855e8,ffff80003c8f9ac0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690
sys_futimens(ffff80003c8fafb0,ffff80003c8f9c00,ffff80003c8f9b50) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2766
syscall(ffff80003c8f9c00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c8f9c00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7bd8f825d50, count: -4