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: 285d, last: now
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 1497d 1646d 0/3 closed as invalid on 2022/02/22 18:44
openbsd witness: reversal: lock order data missing (3) -1 8192 493d 1341d 3/3 fixed on 2024/07/10 22:52
openbsd witness: reversal: lock order data missing (4) -1 57671 360d 493d 0/3 auto-obsoleted due to no activity on 2025/01/09 12:07
openbsd witness: reversal: lock order data missing -1 C 667 1647d 1717d 3/3 fixed on 2021/05/14 01:59

Sample crash report:
witness: lock order reversal:
 1st 0xffff800010fca580 sbufsnd (&so->so_snd.sb_lock)
 2nd 0xfffffd8071c8d118 inode (&ip->i_lock)
lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock)
lock order data 0xffffffff834013ba -> 0xffffffff833759dd is missing
lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock)
#0  rw_do_enter_write+186
#1  sblock+182
#2  soreceive+637
#3  fifo_read+279
#4  VOP_READ+257
#5  vn_rdwr+347
#6  vndsetcred+161
#7  vndioctl+3577
#8  VOP_IOCTL+172
#9  vn_ioctl+248
#10 sys_ioctl+1652
#11 syscall+3028
#12 Xsyscall+296
lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock)
#0  rw_do_enter_write+186
#1  sblock+182
#2  sosplice+786
#3  sys_setsockopt+698
#4  syscall+3028
#5  Xsyscall+296
Stopped at      db_enter+37:    addq    $8,%rsp
ddb{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
db_enter() at db_enter+37
witness_checkorder(fffffd8071c8d118,9,0) at witness_checkorder+4305
rw_do_enter_write(fffffd8071c8d100,1) at rw_do_enter_write+186
rrw_enter(fffffd8071c8d100,1) at rrw_enter+198
VOP_LOCK(fffffd80690f46c0,2001) at VOP_LOCK+189
vn_lock(fffffd80690f46c0,2001) at vn_lock+164
vfs_lookup(ffff80003c486e70) at vfs_lookup+284
namei(ffff80003c486e70) at namei+1994
unp_connect(ffff800010fca398,fffffd807a944b00,ffff8000fffef770) at unp_connect+669
uipc_dgram_send(ffff800010fca398,fffffd8068e46400,fffffd807a944b00,0) at uipc_dgram_send+355
sosend(ffff800010fca398,fffffd807a944b00,ffff80003c4870f8,0,0,e) at sosend+2052
sendit(ffff8000fffef770,24,ffff80003c487278,e,ffff80003c487330) at sendit+1445
sys_sendmsg(ffff8000fffef770,ffff80003c4873e0,ffff80003c487330) at sys_sendmsg+582
syscall(ffff80003c4873e0) at syscall+3028
Xsyscall() at Xsyscall+296
end of kernel
end trace frame: 0x20b026d1230, count: -15
ddb{1}> show registers
rdi                                0
rsi                                0
rbp             18446603337232575200
rbx                                0
rdx                                0
rcx             18446603340516095856
rax             18446603336919474160
r8              18446603337232574912
r9               9259542123273814144
r10             17613282185098260704
r11             13625349110049465904
r12             18446741324996810880
r13             18446741325005100536
r14                                3
r15             18446744071616638478    substchar+16306
rip             18446744071611361365    db_enter+37
cs                                 8
rflags                           582
rsp             18446603337232575184
ss                                16
db_enter+37:    addq    $8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=128385 pid=27924 tcnt=3 stat=onproc
    flags process=0 proc=4000000<THREAD>
    runpri=32, usrpri=82, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff80003c43b250,0xffff80003abfa808
    process=0xffff80003c46cea0 user=0xffff80003c482000, vmspace=0xfffffd8068cff400
    estcpu=32, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 29518  197480  43712      0  7           0                syz-executor
 29518  375829  43712      0  3   0x4000080  fsleep        syz-executor
 33874  153249  92011      0  2           0                syz-executor
 33874  303633  92011      0  2   0x4000000                syz-executor
 33874  294013  92011      0  3   0x4000080  fsleep        syz-executor
 11333   82790  99545      0  2           0                syz-executor
 11333  261972  99545      0  3   0x4000080  fsleep        syz-executor
 27924  372576  19636      0  2           0                syz-executor
*27924  128385  19636      0  7   0x4000000                syz-executor
 27924  369169  19636      0  3   0x4000080  fsleep        syz-executor
 88490   38948  78030      0  3      0x3000  suspend       syz-executor
 88490   53071  78030      0  3   0x4081000  biowait       syz-executor
 88490  180428  78030      0  3   0x4081000  inode         syz-executor
 88490    6150  78030      0  3   0x4081000  inode         syz-executor
 91157  211492      0      0  3     0x14200  acct          acct
 70596  173144  10772      0  3        0x82  wait          syz-executor
 66243  408289  10772      0  3        0x82  wait          syz-executor
 78030  167697  10772      0  3        0x82  nanoslp       syz-executor
  9653  235288      0      0  3     0x14280  nfsidl        nfsio
 55459  170602      0      0  3     0x14280  nfsidl        nfsio
 67048  124621      0      0  3     0x14280  nfsidl        nfsio
 60059  403694      0      0  3     0x14280  nfsidl        nfsio
   650  177920      0      0  3     0x14280  nfsidl        nfsio
 27455  499050      0      0  3     0x14280  nfsidl        nfsio
 78336  456653      0      0  3     0x14280  nfsidl        nfsio
 30372  153698      0      0  3     0x14280  nfsidl        nfsio
 39495  435503      0      0  3     0x14280  nfsidl        nfsio
 99259  392387      0      0  3     0x14280  nfsidl        nfsio
 23580   37936      0      0  3     0x14280  nfsidl        nfsio
 69675   13298      0      0  3     0x14280  nfsidl        nfsio
 35891  162682      0      0  3     0x14280  nfsidl        nfsio
 65126  397417      0      0  3     0x14280  nfsidl        nfsio
 88509  490763      0      0  3     0x14280  nfsidl        nfsio
 86303  316294      0      0  3     0x14280  nfsidl        nfsio
 11129   41194      0      0  3     0x14280  nfsidl        nfsio
 28476  515615      0      0  3     0x14280  nfsidl        nfsio
 99545   78118  10772      0  3        0x82  nanoslp       syz-executor
 24826  122673      1      0  3    0x100083  ttyopn        getty
 92011  471442  10772      0  3        0x82  nanoslp       syz-executor
 43712  110022  10772      0  3        0x82  nanoslp       syz-executor
 19636  384294  10772      0  3        0x82  nanoslp       syz-executor
  5325   16111  10772      0  3         0x2  biowait       syz-executor
 10772  305830   8880      0  3        0x82  kqread        syz-executor
  8880   33823  55445      0  3    0x10008a  sigsusp       ksh
 55445  286450  88924      0  3        0x98  kqread        sshd-session
 88924  406891  53966      0  3        0x92  kqread        sshd-session
 53966  366900      1      0  3        0x88  kqread        sshd
 12351  169864  31621     74  3   0x1100092  bpf           pflogd
 31621  483343      1      0  3        0x80  sbwait        pflogd
 34652  318064  22425     73  3   0x1100090  kqread        syslogd
 22425  164370      1      0  3    0x100082  sbwait        syslogd
 13472  142133      1      0  3    0x100080  kqread        resolvd
 25599  118986  32722     77  3    0x100092  kqread        dhcpleased
 92854  266694  32722     77  3    0x100092  kqread        dhcpleased
 32722  472196      1      0  3        0x80  kqread        dhcpleased
 28144  401988      0      0  3     0x14200  bored         smr
 98202   79316      0      0  3     0x14200  pgzero        zerothread
 66796   64155      0      0  3     0x14200  aiodoned      aiodoned
 33834  448773      0      0  3     0x14200  syncer        update
  9893  211661      0      0  3     0x14200  cleaner       cleaner
 77040    1429      0      0  3     0x14200  reaper        reaper
 37716   69586      0      0  3     0x14200  pgdaemon      pagedaemon
 51374  400045      0      0  3     0x14200  bored         viomb
 97599  252444      0      0  3  0x40014200  acpi0         acpi0
 34279  330395      0      0  3  0x40014200                idle1
 45402  507071      0      0  3     0x14200  bored         softnet1
 10845   93256      0      0  2     0x14200                softnet0
 33939  107610      0      0  3     0x14200  bored         systqmp
 17958   96519      0      0  3     0x14200  bored         systq
 43010  426146      0      0  3     0x14200  tmoslp        softclockmp
 94866  340147      0      0  3  0x40014200  tmoslp        softclock
 91209   63291      0      0  3  0x40014200                idle0
     1   86599      0      0  3        0x82  wait          init
     0       0     -1      0  3  0x10010200  scheduler     swapper
ddb{1}> show all locks
Process 29518 (syz-executor) thread 0xffff8000fffefca0 (197480)
exclusive rwlock vmmaplk r = 0 (0xfffffd8068cff8d0)
#0  witness_lock+1521
#1  rw_do_enter_write+1049
#2  vm_map_lock_ln+302
#3  uvm_map_protect+224
#4  sys_mprotect+849
#5  syscall+3028
#6  Xsyscall+296
Process 27924 (syz-executor) thread 0xffff8000fffef770 (128385)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83933048)
#0  witness_lock+1521
#1  unp_connect+652
#2  uipc_dgram_send+355
#3  sosend+2052
#4  sendit+1445
#5  sys_sendmsg+582
#6  syscall+3028
#7  Xsyscall+296
exclusive rwlock sbufsnd r = 0 (0xffff800010fca580)
#0  witness_lock+1521
#1  rw_do_enter_write+1049
#2  sblock+182
#3  sosend+745
#4  sendit+1445
#5  sys_sendmsg+582
#6  syscall+3028
#7  Xsyscall+296
Process 88490 (syz-executor) thread 0xffff80003c438fc8 (53071)
exclusive rrwlock inode r = 0 (0xfffffd8071c8d930)
#0  witness_lock+1521
#1  rw_do_enter_write+1049
#2  rrw_enter+198
#3  VOP_LOCK+189
#4  vn_lock+164
#5  vn_write+399
#6  dofilewritev+578
#7  sys_write+162
#8  syscall+3028
#9  Xsyscall+296
Process 88490 (syz-executor) thread 0xffff80003c438568 (180428)
exclusive rrwlock inode r = 0 (0xfffffd806e9f90a0)
#0  witness_lock+1521
#1  rw_do_enter_write+1049
#2  rrw_enter+198
#3  VOP_LOCK+189
#4  vn_lock+164
#5  vfs_lookup+284
#6  namei+1994
#7  vn_open+497
#8  doopenat+859
#9  syscall+3028
#10 Xsyscall+296
Process 5325 (syz-executor) thread 0xffff8000ffffd4c8 (16111)
exclusive rrwlock inode r = 0 (0xfffffd807be7da28)
#0  witness_lock+1521
#1  rw_do_enter_write+1049
#2  rrw_enter+198
#3  VOP_LOCK+189
#4  vn_lock+164
#5  vget+674
#6  ufs_ihashget+389
#7  ffs_vget+140
#8  ufs_lookup+6710
#9  VOP_LOOKUP+110
#10 vfs_lookup+2362
#11 namei+1994
#12 dounlinkat+193
#13 syscall+2839
#14 Xsyscall+296
exclusive rrwlock inode r = 0 (0xfffffd807be7db50)
#0  witness_lock+1521
#1  rw_do_enter_write+1049
#2  rrw_enter+198
#3  VOP_LOCK+189
#4  vn_lock+164
#5  vget+674
#6  cache_lookup+849
#7  ufs_lookup+483
#8  VOP_LOOKUP+110
#9  vfs_lookup+2362
#10 namei+1994
#11 dounlinkat+193
#12 syscall+2839
#13 Xsyscall+296
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10252  11294K   11433K 166960K     14816        0
            pcb    17     14K      16K 166960K       548        0
         rtable   203     12K      12K 166960K       816        0
             pf    40     18K      20K 166960K       225        0
         ifaddr    37      6K       7K 166960K       152        0
        ifgroup    63      2K       3K 166960K       272        0
         sysctl     4      1K       9K 166960K        90        0
       counters    72     37K      38K 166960K       290        0
       ioctlops     0      0K       4K 166960K      1928        0
            iov     0      0K      16K 166960K       151        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1435     90K      91K 166960K      3400        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      2K      10K 166960K        31        0
         VM map     2      1K       1K 166960K         2        0
            sem    23     17K      17K 166960K        82        0
        dirhash    12      2K       2K 166960K        60        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    17     61K     240K 166960K      2218        0
          sigio     0      0K       0K 166960K        32        0
           proc    72    115K     180K 166960K       874        0
        subproc    72      4K       4K 166960K       113        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       469        0
       in_multi    58      4K       7K 166960K       518        0
    ether_multi     1      0K       0K 166960K        82        0
            mrt     2      0K       0K 166960K        32        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       590        0
   fusefs mount     1     32K      32K 166960K         1        0
     pfkey data     0      0K       0K 166960K         1        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   256    145K     166K 166960K     21491        0
       UVM aobj    26     22K      22K 166960K        27        0
     pinsyscall    42     84K     100K 166960K      3394        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K       162        0
            NDP    14      0K       2K 166960K       104        0
           temp    78   8668K    8743K 166960K     84526        0
         kqueue    14     20K      30K 166960K       360        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      257    0      254     3     2     1     3     0     8    0
rtentry    176      224    0      155     6     1     5     6     0     8    0
unpcb      144     1234    0     1211     9     6     3     6     0     8    2
syncache   336        6    0        6     2     2     0     1     0     8    0
tcpqe       32        9    0        9     1     1     0     1     0     8    0
tcpcb      736      821    0      817    17    10     7     7     0     8    6
arp        136       34    0       20     1     0     1     1     0     8    0
inpcb      328     2555    0     2547    22    15     7    12     0     8    5
nd6        152       43    0       28     1     0     1     1     0     8    0
pkpcb       40       25    0       25     1     0     1     1     0     8    1
kcovpl      48       12    0        4     1     0     1     1     0     8    0
mppekey    1024       1    0        1     1     1     0     1     0     8    0
ppxss      1192      82    0       82     1     0     1     1     0     8    1
pppxif     1504      12    0       12     2     2     0     1     0     8    0
pfstscr     40        2    0        2     1     1     0     1     0     8    0
pffrag     232       19    0        8     1     0     1     1     0   482    0
pffrnode    88       11    0        2     1     0     1     1     0     8    0
pffrent     40       30    0       19     1     0     1     1     0     8    0
pfosfp      40     1428    0     1005     5     0     5     5     0     8    0
pfosfpen   112     1428    0      714    21     0    21    21     0     8    0
pfrktable  1344      36    0       36     2     1     1     1     0     8    1
pfstitem    24      140    0       32     1     0     1     1     0     8    0
pfstkey    128      141    0       33     4     0     4     4     0     8    0
pfstate    448      141    0       33    12     0    12    12     0     8    0
pfrule     1344      23    0       18     2     1     1     2     0     8    0
rttmr      136        9    0        9     2     1     1     1     0     8    1
art_heap8  4096       4    0        0     4     0     4     4     0     8    0
art_heap4  256     1149    0      860    30    10    20    29     0     8    0
art_table   40     1153    0      860     5     0     5     5     0     8    0
art_node    32      222    0      162     1     0     1     1     0     8    0
sysvmsgpl   40       17    0        9     2     1     1     1     0     8    0
semupl     112        4    0        4     2     1     1     1     0     8    1
semapl     112       72    0       51     1     0     1     1     0     8    0
shmpl      112       15    0        1     1     0     1     1     0     8    0
dirhash    1024      50    0       33     3     0     3     3     0     8    0
dino2pl    256     5323    0     3801    96     0    96    96     0     8    0
ffsino     296     5323    0     3801   118     0   118   118     0     8    0
nchpl      144     8211    0     6497    64     0    64    64     0     8    0
rtmask      32       22    0       22     3     2     1     1     0     8    1
vnodes     216     5926    0        0   330     0   330   330     0     8    0
namei      1024   28190    0    28187     4     2     2     2     0     8    1
percpumem   16      160    0      109     1     0     1     1     0     8    0
vcpupl     3968       9    0        0     2     0     2     2     0     8    0
vmpool     840        9    0        0     1     0     1     1     0     8    0
kstatmem   264      168    0      132     3     0     3     3     0     8    0
acpiwqpl    32        1    0        1     1     0     1     1     1     8    1
scsiplug    72        8    0        8     5     5     0     1     0     8    0
scxspl     216    67312    0    67310    12    10     2     7     1     8    1
plimitpl   152      436    0      416     1     0     1     1     0     8    0
sigapl     424     2479    0     2413     9     1     8     8     0     8    0
knotepl    120      600    0        0    19     0    19    19     0     8    0
kqueuepl   224      926    0      916     9     7     2     5     0     8    1
pipepl     344      427    0      400    16     7     9     9     0     8    6
fdescpl    528     2439    0     2408     3     0     3     3     0     8    0
filepl     160    15779    0    15485    25     7    18    18     0     8    5
lockfpl    104      969    0      966     1     0     1     1     0     8    0
lockfspl    48      388    0      385     1     0     1     1     0     8    0
sessionpl  144       29    0       20     1     0     1     1     0     8    0
pgrppl      48       62    0       45     1     0     1     1     0     8    0
ucredpl    104     2037    0     2023     1     0     1     1     0     8    0
zombiepl   144     2416    0     2413     1     0     1     1     0     8    0
processpl  1232    2479    0     2413     7     1     6     6     0     8    0
procpl     664     5852    0     5777     8     0     8     8     0     8    0
sosppl     176       19    0       19     2     1     1     1     0     8    1
sockpl     752     4107    0     4073    27    17    10    17     0     8    6
mcl64k     65536     27    0        0     4     1     3     3     0     8    0
mcl16k     16384      4    0        0     1     0     1     1     0     8    0
mcl12k     12288      4    0        0     1     0     1     1     0     8    0
mcl9k      9216       2    0        0     1     0     1     1     0     8    0
mcl8k      8192       4    0        0     1     0     1     1     0     8    0
mcl4k      4096     117    0        0    15     0    15    15     0     8    0
mcl2k2     2112       1    0        0     1     0     1     1     0     8    0
mcl2k      2048      46    0        0     5     0     5     5     0     8    0
mtagpl      96       28    0        0     1     0     1     1     0     8    0
mbufpl     256     1479    0        0    91     0    91    91     0     8    0
bufpl      280    27573    0    21436   439     0   439   439     0     8    0
anonpl      32    12466    0        0   101     0   101   101     0   246    0
amapchunkpl 152   87990    0    87442    46    15    31    41     0   158    6
amappl16   200     9630    0     9383    61    34    27    29     0     8    3
amappl15   192       78    0       77     1     0     1     1     0     8    0
amappl14   184        6    0        6     2     2     0     1     0     8    0
amappl13   176      472    0      471     1     0     1     1     0     8    0
amappl12   168     2844    0     2802     3     1     2     3     0     8    0
amappl11   160        6    0        6     1     1     0     1     0     8    0
amappl10   152       95    0       81     1     0     1     1     0     8    0
amappl9    144      246    0      245     2     1     1     1     0     8    0
amappl8    136       35    0       32     1     0     1     1     0     8    0
amappl7    128       98    0       96     1     0     1     1     0     8    0
amappl6    120      333    0      319     1     0     1     1     0     8    0
amappl5    112      103    0       92     1     0     1     1     0     8    0
amappl4    104      453    0      421     1     0     1     1     0     8    0
amappl3     96    12894    0    12792     4     1     3     3     0     8    0
amappl2     88     2556    0     2478     2     0     2     2     0     8    0
amappl1     80    17992    0    17394    15     1    14    14     0     8    0
amappl      88    20358    0    20179     5     0     5     5     0    92    0
uvmvnodes   80      197    0        0     5     0     5     5     0     8    0
dma65536   65536      1    0        1     1     0     1     1     0     8    1
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        8    0        8     2     2     0     1     0     8    0
dma32       32        7    0        7     1     1     0     1     0     8    0
dma16       16       19    0       18     1     0     1     1     0     8    0
aobjpl      72       26    0        1     1     0     1     1     0     8    0
uaddrrnd    24     2439    0     2408     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     2439    0     2408     1     0     1     1     0     8    0
vmmpekpl   168    20663    0    20616     3     0     3     3     0     8    0
vmmpepl    168   159376    0   157202   121    11   110   110     0   357    1
vmsppl     488     2438    0     2408     7     2     5     5     0     8    0
rwobjpl     80    43141    0    41743    36     1    35    35     0     8    0
pdppl      4096    4904    0     4825   125    43    82    86     0     8    3
pvpl        32    20536    0        0   165     0   165   165     0   265    0
pmappl     256     2447    0     2408     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      418    0       71    10     0    10    10     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+39:  addq    $8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff837bbff0) at x86_ipi_db+39
x86_ipi_handler() at x86_ipi_handler+217
Xresume_lapic_ipi() at Xresume_lapic_ipi+39
__mp_lock(ffffffff83932e40) at __mp_lock+402
intr_handler(ffff80003c451140,ffff800000079600) at intr_handler+233
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+399
__mp_lock(ffffffff83932e40) at __mp_lock+402
intr_handler(ffff80003c4512a0,ffff80000006b400) at intr_handler+233
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+399
__sanitizer_cov_trace_const_cmp4(fffffd80706791a8,9) at __sanitizer_cov_trace_const_cmp4+15
rw_do_enter_write(fffffd8070679190,1) at rw_do_enter_write+186
uvm_map_protect(fffffd8068cff7d0,58f3c239000,58f3c639000,3,0,0,ee922eed686a8dbe) at uvm_map_protect+2870
sys_mprotect(ffff8000fffefca0,ffff80003c451680,ffff80003c4515d0) at sys_mprotect+849
syscall(ffff80003c451680) at syscall+3028
Xsyscall() at Xsyscall+296
end of kernel
end trace frame: 0x730ff5a49740, count: -15
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+37:    addq    $8,%rsp
ddb{1}> trace
db_enter() at db_enter+37
witness_checkorder(fffffd8071c8d118,9,0) at witness_checkorder+4305
rw_do_enter_write(fffffd8071c8d100,1) at rw_do_enter_write+186
rrw_enter(fffffd8071c8d100,1) at rrw_enter+198
VOP_LOCK(fffffd80690f46c0,2001) at VOP_LOCK+189
vn_lock(fffffd80690f46c0,2001) at vn_lock+164
vfs_lookup(ffff80003c486e70) at vfs_lookup+284
namei(ffff80003c486e70) at namei+1994
unp_connect(ffff800010fca398,fffffd807a944b00,ffff8000fffef770) at unp_connect+669
uipc_dgram_send(ffff800010fca398,fffffd8068e46400,fffffd807a944b00,0) at uipc_dgram_send+355
sosend(ffff800010fca398,fffffd807a944b00,ffff80003c4870f8,0,0,e) at sosend+2052
sendit(ffff8000fffef770,24,ffff80003c487278,e,ffff80003c487330) at sendit+1445
sys_sendmsg(ffff8000fffef770,ffff80003c4873e0,ffff80003c487330) at sys_sendmsg+582
syscall(ffff80003c4873e0) at syscall+3028
Xsyscall() at Xsyscall+296
end of kernel
end trace frame: 0x20b026d1230, count: -15

Crashes (176878):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/16 00:14 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 23:46 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 22:43 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 21:57 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 20:58 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 20:47 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 19:45 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 19:30 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 18:28 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 17:35 openbsd 42d4ce758e42 f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 16:22 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 16:17 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 15:13 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 14:13 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 14:01 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 13:00 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 12:02 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 11:00 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 10:21 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 09:11 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 08:34 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 07:30 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 07:08 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 06:07 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 05:57 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 04:53 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 04:30 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 03:30 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 02:58 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 01:54 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 01:32 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/15 00:25 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 23:46 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 22:35 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 22:19 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 21:09 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 20:40 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 19:36 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 18:33 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 17:32 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 16:41 openbsd 56163c0cd41e f7988ea4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/11/14 15:34 openbsd 56163c0cd41e f7988ea4 .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.