syzbot


uvm_fault: witness_checkorder (6)

Status: upstream: reported on 2025/05/16 22:51
Reported-by: syzbot+94c529af6dd3e483cff6@syzkaller.appspotmail.com
First crash: 71d, last: 22h23m
Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd uvm_fault: witness_checkorder (3) -1 C 212 683d 937d 0/3 auto-obsoleted due to no activity on 2023/11/01 12:30
openbsd uvm_fault: witness_checkorder (2) -1 1 2076d 2076d 0/3 auto-closed as invalid on 2020/02/18 09:16
openbsd uvm_fault: witness_checkorder -1 syz 2 2107d 2107d 3/3 fixed on 2019/10/22 13:03
openbsd uvm_fault: witness_checkorder (4) -1 1 611d 611d 0/3 auto-obsoleted due to no activity on 2024/02/21 18:24
openbsd uvm_fault: witness_checkorder (5) -1 7 255d 489d 0/3 auto-obsoleted due to no activity on 2025/02/12 06:16

Sample crash report:
uvm_fault(0xfffffd806a2f25d8, 0x48, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      witness_checkorder+0xa9:        movl    0x20(%r14),%r15d
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 285625  58909      0           0          0    0  syz-executor
witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779
mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260
clockintr_unbind(ffff80000149e030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576
dtclose(21e5f,3,2000,ffff80003a430d08) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(21e5f,3,2000,ffff80003a430d08) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80003a428c50) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805f7230f8,3,fffffd80097fb478,ffff80003a430d08) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806b8eb240,ffff80003a430d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806b8eb240,ffff80003a430d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806b8eb240,ffff80003a430d08) at fdrop+0x126 sys/kern/kern_descrip.c:1267
closef(fffffd806b8eb240,ffff80003a430d08) at closef+0x192 sys/kern/kern_descrip.c:1251
fdfree(ffff80003a430d08) at fdfree+0x116 sys/kern/kern_descrip.c:1182
exit1(ffff80003a430d08,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215
sys_exit(ffff80003a430d08,ffff80003a428fc0,ffff80003a428f10) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003a428fc0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a428fc0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748
end trace frame: 0xffff80003a429040, 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{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xfffffd806a2f25d8, 0x48, 0, 1) -> e
ddb{1}> trace
witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779
mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260
clockintr_unbind(ffff80000149e030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576
dtclose(21e5f,3,2000,ffff80003a430d08) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(21e5f,3,2000,ffff80003a430d08) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80003a428c50) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805f7230f8,3,fffffd80097fb478,ffff80003a430d08) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806b8eb240,ffff80003a430d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806b8eb240,ffff80003a430d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806b8eb240,ffff80003a430d08) at fdrop+0x126 sys/kern/kern_descrip.c:1267
closef(fffffd806b8eb240,ffff80003a430d08) at closef+0x192 sys/kern/kern_descrip.c:1251
fdfree(ffff80003a430d08) at fdfree+0x116 sys/kern/kern_descrip.c:1182
exit1(ffff80003a430d08,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215
sys_exit(ffff80003a430d08,ffff80003a428fc0,ffff80003a428f10) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003a428fc0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a428fc0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77a434fd59c0, count: -15
ddb{1}> show registers
rdi                                0
rsi                                0
rbp               0xffff80003a428ab0
rbx                                0
rdx                                0
rcx               0xffff80003a430d08
rax               0xffff8000299ddff0
r8                0xffffffffffffffff
r9                               0x1
r10               0x7c991329bbb51892
r11               0x4e193d285ed42f2e
r12                                0
r13                              0x1
r14                             0x28
r15                              0x3
rip               0xffffffff82af3ff9    witness_checkorder+0xa9
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80003a428a00
ss                                 0
witness_checkorder+0xa9:        movl    0x20(%r14),%r15d
ddb{1}> show proc
PROC (syz-executor) tid=298400 pid=62659 tcnt=0 stat=onproc
    flags process=1008<EXITING,SINGLEEXIT> proc=2000<WEXIT>
    runpri=32, usrpri=50, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0xffff80003a430d08 scnt=-1 ecnt=1
    forw=0xffffffffffffffff, list=0xffff80003a430f98,0xffff80003a430a88
    process=0xffff80003c446248 user=0xffff80003a424000, vmspace=0xfffffd806a2f25d8
    estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 53063  182206  20021      0  2           0                syz-executor
 19723   51650  12846      0  2           0                syz-executor
 73394  257990   5734      0  2           0                syz-executor
 73394   40347   5734      0  3   0x4000080  fsleep        syz-executor
 63216  146008  12182      0  2           0                syz-executor
 63216  235442  12182      0  3   0x4000080  fsleep        syz-executor
 52705  511209  34266      0  2           0                syz-executor
 52705  148699  34266      0  3   0x4000080  fsleep        syz-executor
 52705  362783  34266      0  3   0x4000080  fsleep        syz-executor
 58909  285625  96185      0  7           0                syz-executor
 58909  264799  96185      0  3   0x4000080  sbwait        syz-executor
 58909  465146  96185      0  3   0x4000080  dtread        syz-executor
 58909  104394  96185      0  2   0x4000000                syz-executor
 51720  337671      0      0  3     0x14280  nfsidl        nfsio
  3175   87353      0      0  3     0x14280  nfsidl        nfsio
 99891  108743      0      0  3     0x14280  nfsidl        nfsio
 46851  427185      0      0  3     0x14280  nfsidl        nfsio
 20017  476028      0      0  3     0x14280  nfsidl        nfsio
 51357   94180      0      0  3     0x14280  nfsidl        nfsio
 92529   71263      0      0  3     0x14280  nfsidl        nfsio
 67164   43167      0      0  3     0x14280  nfsidl        nfsio
 74913  354764      0      0  3     0x14280  nfsidl        nfsio
 82535   15900      0      0  3     0x14280  nfsidl        nfsio
 79484  156343      0      0  3     0x14280  nfsidl        nfsio
 64377  362255      0      0  3     0x14280  nfsidl        nfsio
  5460  243027      0      0  3     0x14280  nfsidl        nfsio
 87988  107821      0      0  3     0x14280  nfsidl        nfsio
 22637  191646      0      0  3     0x14280  nfsidl        nfsio
 94169   23262      0      0  3     0x14280  nfsidl        nfsio
 69469  342431      0      0  3     0x14280  nfsidl        nfsio
 31284  413638      0      0  3     0x14280  nfsidl        nfsio
 57387   29171      0      0  3     0x14280  nfsidl        nfsio
 94589  286029      0      0  3     0x14280  nfsidl        nfsio
 12182    8093  36943      0  3        0x82  nanoslp       syz-executor
 12846   89166  36943      0  3        0x82  nanoslp       syz-executor
  5734  100492  36943      0  3        0x82  nanoslp       syz-executor
  6997   10744  36943      0  3        0x82  nanoslp       syz-executor
 96185  459349  36943      0  3        0x82  nanoslp       syz-executor
 20021  487741  36943      0  3        0x82  nanoslp       syz-executor
 81770  472139  36943      0  3        0x82  nanoslp       syz-executor
 34266  446068  36943      0  3        0x82  nanoslp       syz-executor
 36943  463340  21554      0  3        0x82  kqread        syz-executor
 21554  382327  43419      0  3    0x10008a  sigsusp       ksh
 43419  105796  42327      0  3        0x98  kqread        sshd-session
 42327  327256  35993      0  3        0x92  kqread        sshd-session
 34520  229493      1      0  3    0x100083  ttyin         getty
 35993  250703      1      0  3        0x88  kqread        sshd
   944  445355  44847     74  3   0x1100092  bpf           pflogd
 44847  231076      1      0  3        0x80  sbwait        pflogd
 82790   36013  25890     73  3   0x1100090  kqread        syslogd
 25890  424164      1      0  3    0x100082  sbwait        syslogd
 71712  287081      1      0  3    0x100080  kqread        resolvd
 65669   67688  21443     77  3    0x100092  kqread        dhcpleased
 99143  192308  21443     77  3    0x100092  kqread        dhcpleased
 21443   70350      1      0  3        0x80  kqread        dhcpleased
 63398  144517      0      0  3     0x14200  bored         smr
 50115  320211      0      0  2     0x14200                zerothread
 49746  448998      0      0  3     0x14200  aiodoned      aiodoned
 84078  317466      0      0  3     0x14200  syncer        update
 24740  470510      0      0  3     0x14200  cleaner       cleaner
 50778  171949      0      0  3     0x14200  reaper        reaper
 39651  359936      0      0  3     0x14200  pgdaemon      pagedaemon
 61145  392809      0      0  3     0x14200  bored         viomb
 78847  322975      0      0  3  0x40014200  acpi0         acpi0
 84216  407177      0      0  3  0x40014200                idle1
 98760  224902      0      0  3     0x14200  bored         softnet7
  8627  433360      0      0  3     0x14200  bored         softnet6
 81702  277842      0      0  3     0x14200  bored         softnet5
 80799   76591      0      0  3     0x14200  bored         softnet4
 77952  344408      0      0  3     0x14200  bored         softnet3
 46935  303225      0      0  3     0x14200  bored         softnet2
 38709   10995      0      0  3     0x14200  bored         softnet1
 11967  477349      0      0  3     0x14200  bored         softnet0
 43009   90377      0      0  3     0x14200  bored         systqmp
 86477  358672      0      0  3     0x14200  bored         systq
 14250  206253      0      0  3     0x14200  tmoslp        softclockmp
 45794  261609      0      0  3  0x40014200  tmoslp        softclock
 38745  451482      0      0  3  0x40014200                idle0
     1  383771      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{1}> show all locks
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10233  11203K   11203K 166960K     11392        0
            pcb    19     12K      12K 166960K        26        0
         rtable   209      6K       6K 166960K       260        0
             pf    34     17K      21K 166960K        51        0
         ifaddr    43      7K       7K 166960K        46        0
        ifgroup    55      2K       2K 166960K        60        0
         sysctl     1      1K       9K 166960K         5        0
       counters    68     36K      37K 166960K        70        0
       ioctlops     0      0K       4K 166960K      1488        0
            iov     0      0K      12K 166960K         4        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1342     84K      84K 166960K      1383        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     3      1K       1K 166960K         5        0
        dirhash    12      2K       2K 166960K        12        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    18     65K      93K 166960K       175        0
           proc    71    115K     180K 166960K       537        0
        subproc    72      4K       4K 166960K        72        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     1      0K       0K 166960K         5        0
       in_multi    99      7K       7K 166960K       100        0
    ether_multi     1      0K       0K 166960K         1        0
            mrt     1      0K       0K 166960K         2        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys   151    678K     678K 166960K       151        0
           exec     0      0K       1K 166960K       364        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   233    159K     167K 166960K      3247        0
       UVM aobj     3      2K       2K 166960K         3        0
     pinsyscall    43     86K     102K 166960K      1253        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K         5        0
            NDP    12      0K       1K 166960K        29        0
           temp    35   8670K    8734K 166960K      4435        0
         kqueue    13     20K      24K 166960K        27        0
      SYN cache     2     16K      16K 166960K         2        0
ddb{1}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache    128       26    0        0     1     0     1     1     0     8    0
rtpcb      120       39    0       36     1     0     1     1     0     8    0
rtentry    176       97    0        1     5     0     5     5     0     8    0
unpcb      144       47    0       26     1     0     1     1     0     8    0
syncache   336        3    0        3     1     0     1     1     0     8    1
tcpcb      736       42    0        5     4     0     4     4     0     8    0
arp        128       10    0        0     1     0     1     1     0     8    0
inpcb      328      130    0       84     5     0     5     5     0     8    1
nd6        144       18    0        0     1     0     1     1     0     8    0
kcovpl      48        8    0        0     1     0     1     1     0     8    0
pffrent     40        1    0        1     1     0     1     1     0     8    1
pfosfp      40     1428    0     1005     5     0     5     5     0     8    0
pfosfpen   112     1428    0      714    21     0    21    21     0     8    0
pfstitem    24       21    0        0     1     0     1     1     0     8    0
pfstkey    128       21    0        0     1     0     1     1     0     8    0
pfstate    384       21    0        0     3     0     3     3     0     8    0
pfrule     1344      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      440    0        0    28     0    28    28     0     8    0
art_table   40      441    0        0     5     0     5     5     0     8    0
art_node    32       97    0       11     1     0     1     1     0     8    0
semapl     112        1    0        0     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1619    0      106    95     0    95    95     0     8    0
ffsino     296     1619    0      106   117     0   117   117     0     8    0
nchpl      144     1853    0      161    63     0    63    63     0     8    0
uvmvnodes   80     1722    0        0    36     0    36    36     0     8    0
vnodes     216     1722    0        0    96     0    96    96     0     8    0
namei      1024    5734    0     5734     2     0     2     2     0     8    2
percpumem   16       50    0        1     1     0     1     1     0     8    0
kstatmem   264       28    0        2     2     0     2     2     0     8    0
scxspl     216     6737    0     6737     3     2     1     2     1     8    1
plimitpl   152       67    0       48     1     0     1     1     0     8    0
sigapl     424      497    0      423     9     0     9     9     0     8    0
knotepl    120       65    0        0     2     0     2     2     0     8    0
kqueuepl   224       28    0       19     1     0     1     1     0     8    0
pipepl     344      103    0       76     3     0     3     3     0     8    0
fdescpl    528      455    0      423     3     0     3     3     0     8    0
filepl     160     1703    0     1411    13     0    13    13     0     8    0
lockfpl    104       17    0       14     1     0     1     1     0     8    0
lockfspl    48       10    0        7     1     0     1     1     0     8    0
sessionpl  144       22    0       13     1     0     1     1     0     8    0
pgrppl      48       31    0       14     1     0     1     1     0     8    0
ucredpl    104      159    0      146     1     0     1     1     0     8    0
zombiepl   144      425    0      423     1     0     1     1     0     8    0
processpl  1248     497    0      423     6     0     6     6     0     8    0
procpl     656      559    0      478     8     0     8     8     0     8    0
sockpl     752      216    0      146     8     0     8     8     0     8    1
mcl64k     65536      2    0        0     1     0     1     1     0     8    0
mcl9k      9216       1    0        0     1     0     1     1     0     8    0
mcl8k      8192       3    0        0     1     0     1     1     0     8    0
mcl4k      4096     125    0        0    16     0    16    16     0     8    0
mcl2k      2048      18    0        0     3     0     3     3     0     8    0
mtagpl      96        1    0        0     1     0     1     1     0     8    0
mbufpl     256      126    0        0     8     0     8     8     0     8    0
bufpl      280     2992    0      122   205     0   205   205     0     8    0
anonpl      32     3927    0        0    32     0    32    32     0   246    0
amapchunkpl 152    9320    0     8829    24     3    21    21     0   158    0
amappl16   200     1808    0     1788     5     2     3     5     0     8    1
amappl15   192        4    0        4     1     1     0     1     0     8    0
amappl14   184      109    0       97     1     0     1     1     0     8    0
amappl13   176        4    0        4     1     1     0     1     0     8    0
amappl12   168     1092    0     1061     4     1     3     3     0     8    0
amappl11   160       51    0       37     1     0     1     1     0     8    0
amappl10   152        4    0        4     1     1     0     1     0     8    0
amappl9    144      244    0      244     1     1     0     1     0     8    0
amappl8    136       21    0       19     1     0     1     1     0     8    0
amappl7    128      113    0      101     1     0     1     1     0     8    0
amappl6    120      215    0      212     1     0     1     1     0     8    0
amappl5    112      125    0      115     1     0     1     1     0     8    0
amappl4    104      304    0      283     1     0     1     1     0     8    0
amappl3     96     1472    0     1363     3     0     3     3     0     8    0
amappl2     88      625    0      564     2     0     2     2     0     8    0
amappl1     80     8275    0     7674    14     0    14    14     0     8    0
amappl      88     2571    0     2410     4     0     4     4     0    92    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      72        2    0        0     1     0     1     1     0     8    0
uaddrrnd    24      455    0      423     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      455    0      423     1     0     1     1     0     8    0
vmmpekpl   168     5290    0     5257     2     0     2     2     0     8    0
vmmpepl    168    35276    0    33300    88     0    88    88     0   357    0
vmsppl     488      454    0      423     5     0     5     5     0     8    0
rwobjpl     80    14261    0    11627    55     0    55    55     0     8    1
pdppl      4096     917    0      846    99    26    73    85     0     8    2
pvpl        32     9975    0        0    81     0    81    81     0   265    0
pmappl     256      454    0      423     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      268    0       28     7     0     7     7     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
x86_ipi_db(ffffffff83805ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
end of kernel
end trace frame: 0x7e477b0402e0, count: 12
ddb{0}> trace
x86_ipi_db(ffffffff83805ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
end of kernel
end trace frame: 0x7e477b0402e0, count: -3
ddb{0}> machine ddbcpu 1
Stopped at      witness_checkorder+0xa9:        movl    0x20(%r14),%r15d
witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779
mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260
clockintr_unbind(ffff80000149e030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576
dtclose(21e5f,3,2000,ffff80003a430d08) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(21e5f,3,2000,ffff80003a430d08) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80003a428c50) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805f7230f8,3,fffffd80097fb478,ffff80003a430d08) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806b8eb240,ffff80003a430d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806b8eb240,ffff80003a430d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806b8eb240,ffff80003a430d08) at fdrop+0x126 sys/kern/kern_descrip.c:1267
closef(fffffd806b8eb240,ffff80003a430d08) at closef+0x192 sys/kern/kern_descrip.c:1251
fdfree(ffff80003a430d08) at fdfree+0x116 sys/kern/kern_descrip.c:1182
exit1(ffff80003a430d08,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215
sys_exit(ffff80003a430d08,ffff80003a428fc0,ffff80003a428f10) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003a428fc0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a428fc0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748
end trace frame: 0xffff80003a429040, count: 0
ddb{1}> trace
witness_checkorder(28,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779
mtx_enter(18) at mtx_enter+0x4a sys/kern/kern_lock.c:260
clockintr_unbind(ffff80000149e030,1) at clockintr_unbind+0x56 sys/kern/kern_clockintr.c:375
dt_ioctl_record_stop(ffff800001485000) at dt_ioctl_record_stop+0xbc sys/dev/dt/dt_dev.c:576
dtclose(21e5f,3,2000,ffff80003a430d08) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline]
dtclose(21e5f,3,2000,ffff80003a430d08) at dtclose+0x105 sys/dev/dt/dt_dev.c:232
spec_close(ffff80003a428c50) at spec_close+0x45f sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd805f7230f8,3,fffffd80097fb478,ffff80003a430d08) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156
vn_closefile(fffffd806b8eb240,ffff80003a430d08) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd806b8eb240,ffff80003a430d08) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd806b8eb240,ffff80003a430d08) at fdrop+0x126 sys/kern/kern_descrip.c:1267
closef(fffffd806b8eb240,ffff80003a430d08) at closef+0x192 sys/kern/kern_descrip.c:1251
fdfree(ffff80003a430d08) at fdfree+0x116 sys/kern/kern_descrip.c:1182
exit1(ffff80003a430d08,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215
sys_exit(ffff80003a430d08,ffff80003a428fc0,ffff80003a428f10) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80003a428fc0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003a428fc0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x77a434fd59c0, count: -15

Crashes (20):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/26 13:37 openbsd d5b024f63250 3cda49cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/24 08:24 openbsd 484d3a4d3e0d 3cda49cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/24 06:17 openbsd 484d3a4d3e0d 3cda49cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/15 07:52 openbsd feb5a82c5bff 3cda49cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/14 20:36 openbsd 427cdd1fb5e1 3cda49cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/13 14:38 openbsd 5bd8d26974b4 3cda49cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/09 18:52 openbsd e91e1a12e0dd 956bd956 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/09 18:52 openbsd e91e1a12e0dd 956bd956 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/02 04:13 openbsd 15da244b1a00 bc80e4f0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/01 19:39 openbsd c56681b2e09c 091a06cd .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/07/01 04:18 openbsd 76905433011a 6e83b42d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/06/24 19:05 openbsd b3c44d07fb7e 26d77996 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/06/24 19:05 openbsd b3c44d07fb7e 26d77996 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/06/24 19:05 openbsd b3c44d07fb7e 26d77996 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/06/21 02:07 openbsd f62159b6a996 d6cdfb8a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/06/09 08:17 openbsd 1d858eebbab4 4826c28e .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/06/09 02:28 openbsd 1d858eebbab4 4826c28e .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/06/05 20:40 openbsd c875838447ad 6b6b5f21 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/05/18 21:36 openbsd 6decc3d5f4d6 f41472b0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
2025/05/16 22:51 openbsd f47d9bee1200 f41472b0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: witness_checkorder
* Struck through repros no longer work on HEAD.