syzbot


protection_fault: witness_checkorder (5)

Status: upstream: reported on 2025/02/06 12:35
Reported-by: syzbot+a61fbe87bc805c481c49@syzkaller.appspotmail.com
First crash: 434d, last: 8d16h
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd protection_fault: witness_checkorder (2) -1 C 311 890d 1006d 0/3 auto-obsoleted due to no activity on 2023/12/28 01:55
openbsd protection_fault: witness_checkorder -1 1 1325d 1325d 0/3 auto-obsoleted due to no activity on 2022/11/27 19:38
openbsd protection_fault: witness_checkorder (4) -1 1 584d 584d 0/3 auto-obsoleted due to no activity on 2024/12/08 12:11
openbsd protection_fault: witness_checkorder (3) -1 1 773d 773d 0/3 auto-obsoleted due to no activity on 2024/06/02 14:39

Sample crash report:
login: kernel: protection fault trap, code=0
Stopped at      witness_checkorder+0xb5:        movl    0x20(%r14),%r15d
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
witness_checkorder(dead4110dead4228,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779
mtx_enter(dead4110dead4218) at mtx_enter+0x95 sys/kern/kern_lock.c:406
prsignal(dead4110dead4110,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff8000ffffdc90) at reaper+0x2ec sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -4
ddb{0}> show registers
rdi                                0
rsi                                0
rbp               0xffff80002a204550
rbx                                0
rdx                                0
rcx               0xffff8000ffffdc90
rax               0xffffffff838f3ffe    cpu_info_full_primary+0x1ffe
r8                               0x2
r9                                 0
r10               0x575cf0b0602b1edc
r11               0x18601af62c980c8f
r12               0xdead4110dead42fe
r13                              0x9
r14               0xdead4110dead4228
r15                                0
rip               0xffffffff82414005    witness_checkorder+0xb5
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80002a2044b0
ss                              0x10
witness_checkorder+0xb5:        movl    0x20(%r14),%r15d
ddb{0}> show proc
PROC (reaper) tid=140977 pid=62493 tcnt=1 stat=onproc
    flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
    runpri=32, usrpri=50, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff8000fffffc88,0xffff8000ffffd770
    process=0xffff8000ffffb9c0 user=0xffff80002a1ff000, vmspace=0xffffffff83a99370
    estcpu=0, cpticks=5, pctcpu=0.2, user=0, sys=0, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
  1402  350942  77921  32767  2      0x3010                syz-executor
 90234  196530  20934  32767  2        0x10                syz-executor
 90234   92614  20934  32767  7   0x4000010                syz-executor
 14675   37440  34192  32767  2        0x10                syz-executor
 14675   26186  34192  32767  2   0x4000010                syz-executor
 75031  380465  97989  32767  2        0x10                syz-executor
 75031  135258  97989  32767  3   0x4000090  fsleep        syz-executor
 75031  135229  97989  32767  3   0x4000090  fsleep        syz-executor
 98523     600  79528  32767  3        0x90  nanoslp       syz-executor
 98523  481572  79528  32767  3   0x4000090  msgwait       syz-executor
 98523  494228  79528  32767  3   0x4000090  msgwait       syz-executor
 98523  336509  79528  32767  3   0x4000090  fsleep        syz-executor
 97989  310391    991  32767  3        0x90  nanoslp       syz-executor
   991    3134  39749      0  3        0x82  wait          syz-executor
 58901   87325  31750  32767  2       0xc90                syz-executor
 58901  463167  31750  32767  3   0x4000090  ttyout        syz-executor
 58901  328852  31750  32767  3   0x4000090  fsleep        syz-executor
 20934  291056  83417  32767  2       0xc90                syz-executor
 34192  287833  67599  32767  3        0x90  nanoslp       syz-executor
 79528  299589  51884  32767  3        0x90  nanoslp       syz-executor
 77921  138003  63073  32767  3        0x90  nanoslp       syz-executor
 59899  389747  28933  32767  2        0x10                syz-executor
 73759  357900  83116  32767  2        0x10                syz-executor
 31750  199161  53435  32767  3        0x90  nanoslp       syz-executor
 51884  155027  39749      0  3        0x82  wait          syz-executor
 67599   95272  39749      0  3        0x82  wait          syz-executor
 63073  153389  39749      0  3        0x82  wait          syz-executor
 28933  229159  39749      0  3        0x82  wait          syz-executor
 83417   32722  39749      0  3        0x82  wait          syz-executor
 83116  292508  39749      0  3        0x82  wait          syz-executor
 53435  397317  39749      0  3        0x82  wait          syz-executor
 39749   78960  92968      0  3        0x82  kqread        syz-executor
 92968   77687  47317      0  3    0x10008a  sigsusp       ksh
 47317  388501  87373      0  3        0x98  kqread        sshd-session
 87373  160118  59152      0  3        0x92  kqread        sshd-session
 40957  226253      1      0  3    0x100083  ttyin         getty
 59152  341747      1      0  3        0x88  kqread        sshd
  3442  166736  76770     73  3   0x1100090  kqread        syslogd
 76770  409265      1      0  3    0x100082  sbwait        syslogd
 43003  162801      1      0  3    0x100080  kqread        resolvd
 39348    2112  74868     77  3    0x100092  kqread        dhcpleased
 91910  471145  74868     77  3    0x100092  kqread        dhcpleased
 74868  282850      1      0  3        0x80  kqread        dhcpleased
 52674  201407      0      0  3     0x14200  bored         smr
 20460  312810      0      0  2     0x14200                zerothread
 80944   15131      0      0  3     0x14200  aiodoned      aiodoned
 24526  230385      0      0  3     0x14200  syncer        update
 91215   61031      0      0  3     0x14200  cleaner       cleaner
*62493  140977      0      0  7     0x14200                reaper
 99553  478356      0      0  3     0x14200  pgdaemon      pagedaemon
 35739   86038      0      0  3     0x14200  bored         viomb
 22672  513853      0      0  3  0x40014200  acpi0         acpi0
 86276  385734      0      0  3  0x40014200                idle1
  8329  502564      0      0  3     0x14200  bored         softnet1
 14653  509014      0      0  2     0x14200                softnet0
 78874  173972      0      0  3     0x14200  bored         systqmp
 40411  358047      0      0  3     0x14200  bored         systq
 62026  514751      0      0  3     0x14200  tmoslp        softclockmp
 80998  484973      0      0  3  0x40014200  tmoslp        softclock
 82071  188836      0      0  3  0x40014200                idle0
     1  192245      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
Process 90234 (syz-executor) thread 0xffff8000343b47f0 (92614)
exclusive rrwlock inode r = 0 (0xfffffd806ca3a310)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline]
#4  ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159
#5  ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232
#6  ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393
#7  ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732
#8  ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147
#9  VOP_CREATE+0xfe sys/kern/vfs_vops.c:103
#10 vn_open+0x34d sys/kern/vfs_vnops.c:116
#11 doopenat+0x35b sys/kern/vfs_syscalls.c:1155
#12 sys_open+0x59 sys/kern/vfs_syscalls.c:1063
#13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806ca3aa00)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5  vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
#6  namei+0x7ca sys/kern/vfs_lookup.c:250
#7  vn_open+0x1f1 sys/kern/vfs_vnops.c:107
#8  doopenat+0x35b sys/kern/vfs_syscalls.c:1155
#9  sys_open+0x59 sys/kern/vfs_syscalls.c:1063
#10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#11 Xsyscall+0x128
Process 59899 (syz-executor) thread 0xffff8000fffee018 (389747)
exclusive rrwlock inode r = 0 (0xfffffd806ca3a0c0)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5  vget+0x2a2 sys/kern/vfs_subr.c:686
#6  ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98
#7  ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203
#8  ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478
#9  VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#10 vfs_lookup+0x98a sys/kern/vfs_lookup.c:567
#11 namei+0x7ca sys/kern/vfs_lookup.c:250
#12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887
#13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d2a2428)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5  vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
#6  namei+0x7ca sys/kern/vfs_lookup.c:250
#7  dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887
#8  syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8  syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#9  Xsyscall+0x128
Process 73759 (syz-executor) thread 0xffff8000fffef4d8 (357900)
exclusive rrwlock inode r = 0 (0xfffffd806ca3a688)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline]
#4  ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159
#5  ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232
#6  ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393
#7  ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
#8  VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
#9  domkdirat+0x179 sys/kern/vfs_syscalls.c:3143
#10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd8075aeec38)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:570
#5  vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1
#6  namei+0x7ca sys/kern/vfs_lookup.c:250
#7  domkdirat+0x8b sys/kern/vfs_syscalls.c:3128
#8  syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8  syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
#9  Xsyscall+0x128
Process 62493 (reaper) thread 0xffff8000ffffdc90 (140977)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839a1d40)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2  sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#3  rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298
#4  knote_processexit+0x2b sys/kern/kern_event.c:2217
#5  reaper+0x26d sys/kern/kern_exit.c:513
#6  proc_trampoline+0x10
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11080  12022K   12034K 166960K     12176        0
            pcb    17     12K      12K 166960K        17        0
         rtable   237      6K       7K 166960K       388        0
             pf    31     16K      16K 166960K        33        0
         ifaddr    42      7K       7K 166960K        48        0
        ifgroup    50      2K       2K 166960K        54        0
         sysctl     1      1K       9K 166960K         5        0
       counters    70     37K      37K 166960K        72        0
       ioctlops     0      0K       2K 166960K        31        0
            iov     0      0K      16K 166960K         4        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1287     81K      81K 166960K      1361        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       5K 166960K         4        0
         VM map     2      1K       1K 166960K         2        0
            sem     5      0K       0K 166960K         6        0
        dirhash    12      2K       2K 166960K        15        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    24     89K     121K 166960K       213        0
           proc    58     99K     147K 166960K       531        0
        subproc    72      4K       4K 166960K        81        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     2      0K       0K 166960K        16        0
       in_multi   100      7K       7K 166960K       117        0
    ether_multi     2      0K       0K 166960K         3        0
            mrt     1      0K       0K 166960K         4        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys   223    996K     996K 166960K       223        0
           exec     0      0K       1K 166960K       384        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   247    160K     180K 166960K      3732        0
       UVM aobj     5      2K       2K 166960K         5        0
     pinsyscall    45     90K     112K 166960K      1340        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K         4        0
            NDP    13      0K       2K 166960K        30        0
           temp    37   9074K    9138K 166960K      4239        0
         kqueue    20     31K      31K 166960K        38        0
      SYN cache     2     16K      16K 166960K         2        0
ddb{0}> 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       45    0       41     1     0     1     1     0     8    0
rtentry    176      122    0       12     6     0     6     6     0     8    0
unpcb      144       70    0       51     1     0     1     1     0     8    0
syncache   336        4    0        4     1     0     1     1     0     8    1
tcpcb      736       98    0       94     2     0     2     2     0     8    1
arp        136       20    0        2     1     0     1     1     0     8    0
inpcb      328      178    0      169     2     0     2     2     0     8    1
nd6        152       27    0        3     1     0     1     1     0     8    0
kcovpl      48        9    0        1     1     0     1     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      497    0       44    29     0    29    29     0     8    0
art_table   40      498    0       44     5     0     5     5     0     8    0
art_node    32      122    0       22     1     0     1     1     0     8    0
semapl     112        4    0        1     1     0     1     1     0     8    0
shmpl      112        2    0        0     1     0     1     1     0     8    0
dirhash    1024      19    0        2     3     0     3     3     0     8    0
dino2pl    256     1637    0      173    92     0    92    92     0     8    0
ffsino     296     1637    0      173   113     0   113   113     0     8    0
nchpl      144     1911    0      219    63     0    63    63     0     8    0
vnodes     216     1727    0        0    96     0    96    96     0     8    0
namei      1024    5987    0     5985     1     0     1     1     0     8    0
percpumem   16       51    0        1     1     0     1     1     0     8    0
kstatmem   264       26    0        2     2     0     2     2     0     8    0
scxspl     216     6571    0     6571     4     1     3     3     1     8    3
plimitpl   152      108    0       83     2     0     2     2     0     8    0
sigapl     424      509    0      457     7     0     7     7     0     8    0
knotepl    120       95    0        0     3     0     3     3     0     8    0
kqueuepl   224       33    0       19     1     0     1     1     0     8    0
pipepl     344      124    0       97     3     0     3     3     0     8    0
fdescpl    528      493    0      457     3     0     3     3     0     8    0
filepl     160     1957    0     1735    12     0    12    12     0     8    2
lockfpl    104       31    0       29     1     0     1     1     0     8    0
lockfspl    48       14    0       12     1     0     1     1     0     8    0
sessionpl  144       23    0        7     1     0     1     1     0     8    0
pgrppl      48       33    0        9     1     0     1     1     0     8    0
ucredpl    104      246    0      227     1     0     1     1     0     8    0
zombiepl   144      458    0      457     1     0     1     1     0     8    0
processpl  1232     509    0      457     5     0     5     5     0     8    0
procpl     664      613    0      551     6     0     6     6     0     8    0
sockpl     752      293    0      261     5     0     5     5     0     8    1
mcl64k     65536      3    0        0     1     0     1     1     0     8    0
mcl16k     16384      1    0        0     1     0     1     1     0     8    0
mcl8k      8192       3    0        0     1     0     1     1     0     8    0
mcl4k      4096     124    0        0    16     0    16    16     0     8    0
mcl2k      2048      19    0        0     3     0     3     3     0     8    0
mtagpl      96        3    0        0     1     0     1     1     0     8    0
mbufpl     256      278    0        0    18     0    18    18     0     8    0
bufpl      280     2370    0      102   162     0   162   162     0     8    0
anonpl      32    10689    0        0    87     0    87    87     0   246    0
amapchunkpl 152   10930    0    10386    32     0    32    32     0   158    9
amappl16   200     2146    0     2127    14     0    14    14     0     8   12
amappl15   192        3    0        3     1     1     0     1     0     8    0
amappl14   184      423    0      422     1     0     1     1     0     8    0
amappl13   176      115    0      105     1     0     1     1     0     8    0
amappl12   168      738    0      703     2     0     2     2     0     8    0
amappl11   160        6    0        6     1     1     0     1     0     8    0
amappl10   152       61    0       51     1     0     1     1     0     8    0
amappl9    144      254    0      254     1     1     0     1     0     8    0
amappl8    136      100    0       99     1     0     1     1     0     8    0
amappl7    128      146    0      135     1     0     1     1     0     8    0
amappl6    120      162    0      161     1     0     1     1     0     8    0
amappl5    112      100    0       93     1     0     1     1     0     8    0
amappl4    104      269    0      252     1     0     1     1     0     8    0
amappl3     96     1820    0     1691     5     1     4     4     0     8    0
amappl2     88      532    0      481     2     0     2     2     0     8    0
amappl1     80     9957    0     9381    16     0    16    16     0     8    1
amappl      88     3006    0     2824     5     0     5     5     0    92    0
uvmvnodes   80      102    0        0     3     0     3     3     0     8    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        4    0        0     1     0     1     1     0     8    0
uaddrrnd    24      493    0      457     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      493    0      457     1     0     1     1     0     8    0
vmmpekpl   168     5773    0     5737     2     0     2     2     0     8    0
vmmpepl    168    40443    0    38431   104     0   104   104     0   357   11
vmsppl     488      492    0      457     7     1     6     6     0     8    0
rwobjpl     80    14902    0    13956    26     0    26    26     0     8    2
pdppl      4096     993    0      914   109    20    89    95     0     8   10
pvpl        32    17659    0        0   143     0   143   143     0   265    0
pmappl     256      492    0      457     4     1     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      285    0       23     8     0     8     8     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
witness_checkorder(dead4110dead4228,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779
mtx_enter(dead4110dead4218) at mtx_enter+0x95 sys/kern/kern_lock.c:406
prsignal(dead4110dead4110,14) at prsignal+0x36 sys/kern/kern_sig.c:904
reaper(ffff8000ffffdc90) at reaper+0x2ec sys/kern/kern_exit.c:516
end trace frame: 0x0, count: -4
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299adff0) 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
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x78 kd_claim sys/dev/kcov.c:626 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x78 sys/dev/kcov.c:157
__mp_lock(ffffffff839a1540) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff839a1540) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
__mp_acquire_count(ffffffff839a1540,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369
biowait(fffffd8068d88b30) at biowait+0xc6 sys/kern/vfs_bio.c:1242
bwrite(fffffd8068d88b30) at bwrite+0x2e7 sys/kern/vfs_bio.c:754
VOP_BWRITE(fffffd8068d88b30) at VOP_BWRITE+0x60 sys/kern/vfs_vops.c:651
ufs_direnter(fffffd8067da92a8,fffffd8067da9890,ffff80002a322408,ffff80002a322878,0) at ufs_direnter+0x7ac sys/ufs/ufs/ufs_lookup.c:833
ufs_makeinode(8180,fffffd8067da92a8,ffff80002a322848,ffff80002a322878) at ufs_makeinode+0x51b sys/ufs/ufs/ufs_vnops.c:1768
ufs_create(ffff80002a3225d0) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147
VOP_CREATE(fffffd8067da92a8,ffff80002a322848,ffff80002a322878,ffff80002a322650) at VOP_CREATE+0xfe sys/kern/vfs_vops.c:103
vn_open(ffff80002a322818,1828a,180) at vn_open+0x34d sys/kern/vfs_vnops.c:116
doopenat(ffff8000343b47f0,ffffff9c,200000000080,18289,190,0,a99e940f1548e82f) at doopenat+0x35b sys/kern/vfs_syscalls.c:1155
sys_open(ffff8000343b47f0,ffff80002a322ad0,ffff80002a322a20) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063
syscall(ffff80002a322ad0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a322ad0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x43710a10ed0, count: -19

Crashes (19):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/08 02:04 openbsd 008d3704691e 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2026/03/21 12:05 openbsd a71bcab410b6 5b92003d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2026/01/22 21:14 openbsd 9e4d3748fbc0 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2026/01/11 22:59 openbsd 527652508a36 56f88057 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2026/01/03 02:33 openbsd 287000ffa12f e3fbc05e .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/12/17 06:33 openbsd 3a6d4b98bde9 a066d2bc .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: witness_checkorder
2025/12/16 04:47 openbsd e03bf016d023 a066d2bc .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/11/20 04:55 openbsd 9c1a3717ded9 26ee5237 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/11/10 19:53 openbsd d046e1d8fd3f 4e1406b4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/11/07 12:00 openbsd e6704d8803de 4e1406b4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/11/05 13:07 openbsd 69af9e93ff65 a6c9c731 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/11/02 14:16 openbsd 6e779084bd79 2c50b6a9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/08/14 02:11 openbsd f6ad99933bf1 22ec1469 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/08/01 13:31 openbsd 8693ef6a6ffe 3cda49cf .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/05/22 04:12 openbsd c902741cb17b 0919b50b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/03/03 02:30 openbsd 2ca76a892c5e c3901742 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
2025/02/11 06:35 openbsd c7df606a226b 43f51a00 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: witness_checkorder
2025/02/07 14:11 openbsd 307723971475 a4f327c2 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: witness_checkorder
2025/02/06 12:35 openbsd 4a7e1005694f 1e1faf27 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: witness_checkorder
* Struck through repros no longer work on HEAD.