syzbot


witness: reversal: lock order data missing (5)

Status: upstream: reported on 2025/02/03 09:07
Reported-by: syzbot+6e45b18b14156f1df9f4@syzkaller.appspotmail.com
First crash: 292d, last: 3h28m
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd witness: reversal: lock order data missing (2) -1 C 173 1504d 1654d 0/3 closed as invalid on 2022/02/22 18:44
openbsd witness: reversal: lock order data missing (3) -1 8192 500d 1348d 3/3 fixed on 2024/07/10 22:52
openbsd witness: reversal: lock order data missing (4) -1 57671 367d 500d 0/3 auto-obsoleted due to no activity on 2025/01/09 12:07
openbsd witness: reversal: lock order data missing -1 C 667 1654d 1724d 3/3 fixed on 2021/05/14 01:59

Sample crash report:
login: witness: lock order reversal:
 1st 0xffff800001433590 sbufrcv (&so->so_rcv.sb_lock)
 2nd 0xfffffd806c9c67d0 inode (&ip->i_lock)
lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock)
lock order data 0xffffffff83336438 -> 0xffffffff8337d414 is missing
lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock)
#0  rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
#1  sblock+0xb6 sys/kern/uipc_socket2.c:536
#2  soreceive+0x27d sys/kern/uipc_socket.c:878
#3  fifo_read+0x117 sys/miscfs/fifofs/fifo_vnops.c:264
#4  VOP_READ+0x101 sys/kern/vfs_vops.c:227
#5  vn_rdwr+0x15b sys/kern/vfs_vnops.c:-1
#6  vndsetcred+0xa1 sys/dev/vnd.c:685
#7  vndioctl+0xdfc sys/dev/vnd.c:486
#8  VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#9  vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531
#10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
#12 Xsyscall+0x128
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806c9c67d0,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806c9c67b8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806c9c67b8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd800d2602a0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
vn_lock(fffffd800d2602a0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd800d2602a0,fffffd800d2602a0,0,0,200,0,b50350012a1f4459) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd800d2602a0,fffffd800d2602a0,ffff80002a2914d8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806c856400,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff8000014334a0,ffff80003c41c858,ffff80003c41c808,0,ffff80003c41c840,ffff80003c41c9cc,7b57bc997258b99b) at soreceive+0xc24 sys/kern/uipc_socket.c:1017
recvit(ffff80002a2914d8,4,ffff80003c41c9a0,0,ffff80003c41ca50) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff80002a2914d8,ffff80003c41cb00,ffff80003c41ca50) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003c41cb00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c41cb00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf29cacd0410, count: -14
ddb{0}> show registers
rdi                                0
rsi                          0x80000    acpi_pdirpa+0x6be71
rbp               0xffff80003c41c2f0
rbx                                0
rdx               0xffff80000148a740
rcx               0xffff80002a2914d8
rax                          0x7ffff    acpi_pdirpa+0x6be70
r8                0xffff80003c41c1d0
r9                0x8080808080808080
r10               0x423511f8b88138cc
r11               0x7ffd73d18cd333fc
r12               0xfffffd8003f41880
r13               0xfffffd80047293d8
r14                              0x3
r15               0xffffffff83415eef    substchar+0x8ebc
rip               0xffffffff81a14155    db_enter+0x25
cs                               0x8
rflags                         0x246
rsp               0xffff80003c41c2e0
ss                              0x10
db_enter+0x25:  addq    $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=35624 pid=16334 tcnt=2 stat=onproc
    flags process=1000000<CHROOT> proc=4000000<THREAD>
    runpri=32, usrpri=50, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff80002a290a78,0xffffffff8393dee8
    process=0xffff80003c484028 user=0xffff80003c417000, vmspace=0xfffffd806d9de030
    estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 16334  173866  86787      0  3   0x1000080  fsleep        syz-executor
*16334   35624  86787      0  7   0x5000000                syz-executor
 34347  435061  29534      0  3        0x80  fsleep        syz-executor
 34347  162368  29534      0  3   0x4000080  ttyin         syz-executor
 16547  354326  59794      0  3        0x80  fsleep        syz-executor
 16547  438972  59794      0  3   0x4000080  ttyout        syz-executor
 25426  144258      0      0  3     0x14200  acct          acct
 66085  498590  28872      0  3        0x80  fsleep        syz-executor
 66085  262251  28872      0  3   0x4000080  sbwait        syz-executor
 56174   44032  55657      0  3        0x80  fsleep        syz-executor
 56174  283503  55657      0  3   0x4000080  ttyout        syz-executor
 85809  298240  90175      0  3        0x80  fsleep        syz-executor
 85809  496832  90175      0  3   0x4000080  ttyout        syz-executor
 21740  269936      1      0  3    0x100083  ttyin         getty
 11053  321105  32616      0  3        0x80  fsleep        syz-executor
 11053  168214  32616      0  3   0x4000080  ttyout        syz-executor
 28872  158931  71023      0  3        0x82  nanoslp       syz-executor
 47836  299102      0      0  3     0x14280  nfsidl        nfsio
 75891  364440      0      0  3     0x14280  nfsidl        nfsio
 45495  202508      0      0  3     0x14280  nfsidl        nfsio
 46734   36548      0      0  3     0x14280  nfsidl        nfsio
 74342  225431      0      0  3     0x14280  nfsidl        nfsio
 97357  436255      0      0  3     0x14280  nfsidl        nfsio
  1571  516625      0      0  3     0x14280  nfsidl        nfsio
 59342  338037      0      0  3     0x14280  nfsidl        nfsio
 86753  477531      0      0  3     0x14280  nfsidl        nfsio
 81177  266629      0      0  3     0x14280  nfsidl        nfsio
 89489  112465      0      0  3     0x14280  nfsidl        nfsio
 63935  405540      0      0  3     0x14280  nfsidl        nfsio
  6427   92505      0      0  3     0x14280  nfsidl        nfsio
  3911  100575      0      0  3     0x14280  nfsidl        nfsio
 88924  157970      0      0  3     0x14280  nfsidl        nfsio
 93264    6836      0      0  3     0x14280  nfsidl        nfsio
 28760  384978      0      0  3     0x14280  nfsidl        nfsio
 43193  510800      0      0  3     0x14280  nfsidl        nfsio
 98103  272641      0      0  3     0x14280  nfsidl        nfsio
  5680  236359      0      0  3     0x14280  nfsidl        nfsio
 86787  362337  71023      0  3        0x82  nanoslp       syz-executor
 59794  520852  71023      0  3        0x82  nanoslp       syz-executor
 29534   39932  71023      0  3        0x82  nanoslp       syz-executor
 90175   17921  71023      0  3        0x82  nanoslp       syz-executor
 55657   42278  71023      0  3        0x82  nanoslp       syz-executor
 32616  404069  71023      0  3        0x82  nanoslp       syz-executor
  3332  185855  71023      0  3        0x82  wait          syz-executor
 71023  493017  70016      0  3        0x82  kqread        syz-executor
 70016  147168  40177      0  3    0x10008a  sigsusp       ksh
 40177  228577  25653      0  3        0x98  kqread        sshd-session
 25653  362757  45658      0  3        0x92  kqread        sshd-session
 45658   79942      1      0  3        0x88  kqread        sshd
  2851  434261  40612     74  3   0x1100092  bpf           pflogd
 40612  496657      1      0  3        0x80  sbwait        pflogd
 86468  346038  44719     73  3   0x1100090  kqread        syslogd
 44719  443382      1      0  3    0x100082  sbwait        syslogd
 29980  189070      1      0  3    0x100080  kqread        resolvd
 38398  146509  33040     77  3    0x100092  kqread        dhcpleased
 71885  359343  33040     77  3    0x100092  kqread        dhcpleased
 33040  314415      1      0  3        0x80  kqread        dhcpleased
 32879  433557      0      0  3     0x14200  bored         smr
 37235  207147      0      0  3     0x14200  pgzero        zerothread
 71480  413660      0      0  3     0x14200  aiodoned      aiodoned
 74066  403599      0      0  3     0x14200  syncer        update
 35202  397189      0      0  3     0x14200  cleaner       cleaner
 77153    8603      0      0  3     0x14200  reaper        reaper
  9402  307588      0      0  3     0x14200  pgdaemon      pagedaemon
 60768  304694      0      0  3     0x14200  bored         viomb
 44796  244394      0      0  3  0x40014200  acpi0         acpi0
 33603  431788      0      0  7  0x40014200                idle1
 41221     258      0      0  3     0x14200  bored         softnet1
 61136  395921      0      0  3     0x14200  bored         softnet0
 78293  436878      0      0  3     0x14200  bored         systqmp
 12313  507240      0      0  3     0x14200  bored         systq
 76058  239576      0      0  3     0x14200  tmoslp        softclockmp
 29642  266559      0      0  3  0x40014200  tmoslp        softclock
 60052  403299      0      0  3  0x40014200                idle0
     1  128727      0      0  3        0x82  wait          init
     0       0     -1      0  3  0x10010200  scheduler     swapper
ddb{0}> show all locks
Process 16334 (syz-executor) thread 0xffff80002a2914d8 (35624)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b60b0)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  unp_externalize+0x155 sys/kern/uipc_usrreq.c:-1
#2  soreceive+0xc24 sys/kern/uipc_socket.c:1017
#3  recvit+0x40b sys/kern/uipc_syscalls.c:1078
#4  sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
#5  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
#6  Xsyscall+0x128
exclusive rwlock sbufrcv r = 0 (0xffff800001433590)
#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  sblock+0xb6 sys/kern/uipc_socket2.c:536
#3  soreceive+0x27d sys/kern/uipc_socket.c:878
#4  recvit+0x40b sys/kern/uipc_syscalls.c:1078
#5  sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
#6  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
#7  Xsyscall+0x128
Process 66085 (syz-executor) thread 0xffff80003c4a0fc0 (262251)
exclusive rwlock sbufrcv r = 0 (0xffff800010fdccd0)
#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  sblock+0xb6 sys/kern/uipc_socket2.c:536
#3  soreceive+0x27d sys/kern/uipc_socket.c:878
#4  recvit+0x40b sys/kern/uipc_syscalls.c:1078
#5  sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969
#6  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
#7  Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10218  11095K   11570K 166960K     13276        0
            pcb    18     12K      12K 166960K       222        0
         rtable   211      9K       9K 166960K       581        0
             pf    39     18K      25K 166960K       211        0
         ifaddr    37      6K       8K 166960K       125        0
        ifgroup    55      2K       2K 166960K       246        0
         sysctl     3      1K       9K 166960K        10        0
       counters    68     36K      37K 166960K       230        0
       ioctlops     0      0K       4K 166960K      1694        0
            iov     2     16K      24K 166960K        50        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1316     83K      84K 166960K      2501        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      2K       5K 166960K         6        0
         VM map     2      1K       1K 166960K         2        0
            sem    16      3K       3K 166960K        34        0
        dirhash    12      2K       2K 166960K        48        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    18     65K     240K 166960K      3291        0
          sigio     0      0K       0K 166960K        31        0
           proc    72    115K     180K 166960K       670        0
        subproc    72      4K       4K 166960K        82        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       162        0
       in_multi    77      5K       7K 166960K       201        0
    ether_multi     1      0K       0K 166960K        27        0
            mrt     1      0K       0K 166960K        21        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys   103    466K     466K 166960K       103        0
           exec     0      0K       1K 166960K       461        0
   fusefs mount     1     32K      32K 166960K         1        0
     pfkey data     0      0K       0K 166960K         3        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   249    168K     182K 166960K     26769        0
       UVM aobj    13     14K      14K 166960K        14        0
     pinsyscall    43     86K     101K 166960K      4439        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K        69        0
            NDP    12      0K       2K 166960K        87        0
           temp    59   8675K    8754K 166960K     69984        0
         kqueue    13     20K      27K 166960K       239        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      130    0      127     1     0     1     1     0     8    0
rtentry    176      163    0       78     6     0     6     6     0     8    0
unpcb      144      495    0      474     2     1     1     2     0     8    0
syncache   336       10    0       10     3     2     1     1     0     8    1
tcpcb      736      276    0      271     1     0     1     1     0     8    0
arp        136       26    0       12     1     0     1     1     0     8    0
inpcb      328      878    0      868     3     1     2     2     0     8    1
nd6        152       28    0        9     1     0     1     1     0     8    0
pkpcb       40       10    0       10     3     3     0     1     0     8    0
kcovpl      48        9    0        1     1     0     1     1     0     8    0
mppekey    1024       2    0        2     1     0     1     1     0     8    1
ppxss      1192      53    0       53     2     1     1     1     0     8    1
pppxif     1504      11    0       11     1     0     1     1     0     8    1
pfstscr     40        3    0        2     2     1     1     1     0     8    0
pffrag     232       15    0        8     1     0     1     1     0   482    0
pffrnode    88       14    0        7     1     0     1     1     0     8    0
pffrent     40       24    0       17     1     0     1     1     0     8    0
pfosfp      40     1429    0     1005     5     0     5     5     0     8    0
pfosfpen   112     1429    0      714    21     0    21    21     0     8    0
pfrktable  1344       2    0        2     1     1     0     1     0     8    0
pfanchor   1288       4    0        0     1     0     1     1     0     8    0
pftag       88        1    0        0     1     0     1     1     0     8    0
pfstitem    24       54    0       30     1     0     1     1     0     8    0
pfstkey    128       58    0       34     2     0     2     2     0     8    0
pfstate    448       54    0       32     5     0     5     5     0     8    0
pfrule     1344      28    0       22     2     1     1     2     0     8    0
rttmr      136        3    0        3     3     2     1     1     0     8    1
art_heap8  4096       4    0        0     4     0     4     4     0     8    0
art_heap4  256      669    0      300    31     6    25    31     0     8    0
art_table   40      673    0      300     5     0     5     5     0     8    0
art_node    32      162    0       85     1     0     1     1     0     8    0
sysvmsgpl   40        6    0        3     1     0     1     1     0     8    0
semupl     112        1    0        1     1     1     0     1     0     8    0
semapl     112       27    0       13     1     0     1     1     0     8    0
shmpl      112        4    0        0     1     0     1     1     0     8    0
dirhash    1024      41    0       24     3     0     3     3     0     8    0
dino2pl    256     5926    0     4434    95     0    95    95     0     8    0
ffsino     296     5926    0     4434   117     0   117   117     0     8    0
nchpl      144     9509    0     7809    64     0    64    64     0     8    0
rtmask      32        2    0        2     1     0     1     1     0     8    1
vnodes     216     5926    0        0   330     0   330   330     0     8    0
namei      1024   23527    0    23527     4     3     1     2     0     8    1
percpumem   16      130    0       81     1     0     1     1     0     8    0
vcpupl     3968       6    0        0     1     0     1     1     0     8    0
vmpool     840        7    0        1     1     0     1     1     0     8    0
kstatmem   264      144    0      114     4     1     3     3     0     8    1
scsiplug    72        7    0        7     4     4     0     1     0     8    0
scxspl     216    60935    0    60935    13    12     1     8     1     8    1
plimitpl   152      193    0      171     1     0     1     1     0     8    0
sigapl     424     3595    0     3526     8     0     8     8     0     8    0
knotepl    120      539    0        0    17     0    17    17     0     8    0
kqueuepl   224      291    0      282     1     0     1     1     0     8    0
pipepl     344      169    0      142     4     1     3     3     0     8    0
fdescpl    528     3555    0     3523     3     0     3     3     0     8    0
filepl     160     8768    0     8536    11     1    10    10     0     8    0
lockfpl    104      481    0      477     1     0     1     1     0     8    0
lockfspl    48      218    0      214     1     0     1     1     0     8    0
sessionpl  144       29    0       20     1     0     1     1     0     8    0
pgrppl      48       42    0       25     1     0     1     1     0     8    0
ucredpl    104     1184    0     1171     1     0     1     1     0     8    0
zombiepl   144     3527    0     3526     2     1     1     1     0     8    0
processpl  1232    3595    0     3526     6     0     6     6     0     8    0
procpl     664     6712    0     6636     7     0     7     7     0     8    0
sockpl     752     1538    0     1504     6     1     5     5     0     8    1
mcl64k     65536     29    0        0     3     0     3     3     0     8    0
mcl16k     16384     17    0        0     3     0     3     3     0     8    0
mcl12k     12288     17    0        0     2     0     2     2     0     8    0
mcl9k      9216      12    0        0     1     0     1     1     0     8    0
mcl8k      8192      25    0        0     3     0     3     3     0     8    0
mcl4k      4096     122    0        0    16     0    16    16     0     8    0
mcl2k2     2112       2    0        0     1     0     1     1     0     8    0
mcl2k      2048      31    0        0     4     0     4     4     0     8    0
mtagpl      96      133    0        0     4     0     4     4     0     8    0
mbufpl     256      351    0        0    20     0    20    20     0     8    0
bufpl      280    24038    0    17901   439     0   439   439     0     8    0
anonpl      32    11516    0        0    93     0    93    93     0   246    0
amapchunkpl 152   94580    0    94087    43    18    25    29     0   158    4
amappl16   200    10400    0    10363   106    92    14    28     0     8    8
amappl15   192        6    0        5     1     0     1     1     0     8    0
amappl14   184        6    0        6     1     1     0     1     0     8    0
amappl13   176      453    0      452     2     1     1     1     0     8    0
amappl12   168     3956    0     3913     3     0     3     3     0     8    0
amappl11   160        5    0        5     2     2     0     1     0     8    0
amappl10   152       51    0       37     1     0     1     1     0     8    0
amappl9    144      268    0      268     2     2     0     1     0     8    0
amappl8    136       40    0       38     1     0     1     1     0     8    0
amappl7    128       81    0       80     1     0     1     1     0     8    0
amappl6    120      295    0      282     1     0     1     1     0     8    0
amappl5    112       75    0       65     1     0     1     1     0     8    0
amappl4    104      448    0      418     1     0     1     1     0     8    0
amappl3     96    17482    0    17386     4     1     3     3     0     8    0
amappl2     88     3698    0     3624     2     0     2     2     0     8    0
amappl1     80    22863    0    22256    18     3    15    15     0     8    1
amappl      88    25847    0    25677     4     0     4     4     0    92    0
uvmvnodes   80      143    0        0     3     0     3     3     0     8    0
dma65536   65536      1    0        1     1     1     0     1     0     8    0
dma32768   32768      1    0        1     1     0     1     1     0     8    1
dma8192    8192       1    0        1     1     1     0     1     0     8    0
dma4096    4096       1    0        1     1     1     0     1     0     8    0
dma2048    2048       1    0        1     1     1     0     1     0     8    0
dma1024    1024       1    0        0     1     0     1     1     0     8    0
dma256     256        8    0        8     2     2     0     1     0     8    0
dma128     128      255    0      255     3     3     0     1     0     8    0
dma64       64        7    0        7     2     2     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       13    0        1     1     0     1     1     0     8    0
uaddrrnd    24     3555    0     3523     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     3555    0     3523     1     0     1     1     0     8    0
vmmpekpl   168    23231    0    23188     3     0     3     3     0     8    0
vmmpepl    168   212318    0   210344   126    19   107   107     0   357   10
vmsppl     488     3554    0     3523     7     2     5     5     0     8    0
rwobjpl     80    49532    0    48440    42    10    32    32     0     8    4
pdppl      4096    7132    0     7054   115    35    80    86     0     8    2
pvpl        32    20346    0        0   163     0   163   163     0   265    0
pmappl     256     3561    0     3524     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      322    0       52     8     0     8     8     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806c9c67d0,9,0) at witness_checkorder+0x10b9 sys/kern/subr_witness.c:-1
rw_do_enter_write(fffffd806c9c67b8,1) at rw_do_enter_write+0xba sys/kern/kern_rwlock.c:234
rrw_enter(fffffd806c9c67b8,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
VOP_LOCK(fffffd800d2602a0,2001) at VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527
vn_lock(fffffd800d2602a0,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd800d2602a0,fffffd800d2602a0,0,0,200,0,b50350012a1f4459) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd800d2602a0,fffffd800d2602a0,ffff80002a2914d8) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806c856400,33,0) at unp_externalize+0x26f sys/kern/uipc_usrreq.c:1090
soreceive(ffff8000014334a0,ffff80003c41c858,ffff80003c41c808,0,ffff80003c41c840,ffff80003c41c9cc,7b57bc997258b99b) at soreceive+0xc24 sys/kern/uipc_socket.c:1017
recvit(ffff80002a2914d8,4,ffff80003c41c9a0,0,ffff80003c41ca50) at recvit+0x40b sys/kern/uipc_syscalls.c:1078
sys_recvmsg(ffff80002a2914d8,ffff80003c41cb00,ffff80003c41ca50) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878
syscall(ffff80003c41cb00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c41cb00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf29cacd0410, count: -14
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299edff0) 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
acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224
sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191
end trace frame: 0x0, count: -5

Crashes (178523):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/23 01:14 openbsd d1bc7a39681f 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/23 00:10 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 23:10 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 22:43 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 21:12 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 21:07 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 20:04 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 18:54 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 18:18 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 17:02 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 16:44 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 15:41 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 14:38 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 14:07 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 13:05 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 12:28 openbsd d9c8e9704ea3 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 10:47 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 10:07 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 09:07 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 08:34 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 07:33 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 06:36 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 05:35 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 05:12 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 04:12 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 04:09 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 03:08 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 02:30 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 01:22 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 01:19 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/22 00:18 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/21 23:55 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/21 22:49 openbsd 16f4e75c8e57 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/21 11:57 openbsd e35b8f0de8d7 52ed5c96 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/21 10:39 openbsd e35b8f0de8d7 52ed5c96 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/21 01:17 openbsd 664a2aa283c6 280ea308 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/21 01:12 openbsd 664a2aa283c6 280ea308 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/21 00:10 openbsd 664a2aa283c6 280ea308 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/21 00:09 openbsd 664a2aa283c6 280ea308 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/20 22:55 openbsd 664a2aa283c6 280ea308 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/20 22:22 openbsd 664a2aa283c6 280ea308 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/20 21:17 openbsd 5aa51b7bb462 2cc4c24a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/03 09:06 openbsd db5d28f093d6 568559e4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
* Struck through repros no longer work on HEAD.