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: 19d, last: now
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd witness: reversal: lock order data missing (2) C 173 1231d 1381d 0/3 closed as invalid on 2022/02/22 18:44
openbsd witness: reversal: lock order data missing (3) 8192 227d 1075d 3/3 fixed on 2024/07/10 22:52
openbsd witness: reversal: lock order data missing (4) 57671 94d 227d 0/3 auto-obsoleted due to no activity on 2025/01/09 12:07
openbsd witness: reversal: lock order data missing C 667 1381d 1451d 3/3 fixed on 2021/05/14 01:59

Sample crash report:
login: witness: lock order reversal:
 1st 0xffff800010fd4650 sbufrcv (&so->so_rcv.sb_lock)
 2nd 0xfffffd806965e848 inode (&ip->i_lock)
lock order [1] sbufrcv (&so->so_rcv.sb_lock) -> [2] inode (&ip->i_lock)
lock order data 0xffffffff834385bd -> 0xffffffff833a5512 is missing
lock order [2] inode (&ip->i_lock) -> [1] sbufrcv (&so->so_rcv.sb_lock)
#0  rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
#1  sblock+0xb7 sys/kern/uipc_socket2.c:536
#2  soreceive+0x28e sys/kern/uipc_socket.c:882
#3  fifo_read+0x11a sys/miscfs/fifofs/fifo_vnops.c:264
#4  VOP_READ+0x102 sys/kern/vfs_vops.c:227
#5  vn_rdwr+0x15b
#6  vndsetcred+0xa1 sys/dev/vnd.c:684
#7  vndioctl+0xe6c sys/dev/vnd.c:485
#8  VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
#9  vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531
#10 sys_ioctl+0x5c3
#11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#12 Xsyscall+0x128
Stopped at      db_enter+0x25:  addq    $0x8,%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+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806965e848,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806965e830,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806965e830,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd8068e917e8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8068e917e8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd8068e917e8,fffffd8068e91998,0,0,200,0,5dd0a01baebed554) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8068e917e8,fffffd8068e91998,ffff80002a392020) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806cbbeb00,ec,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff800010fd4570,ffff80003c595508,ffff80003c5954b8,0,ffff80003c5954f8,ffff80003c59567c,6724f5d63645bebe) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff80002a392020,5,ffff80003c595650,0,ffff80003c595700) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff80002a392020,ffff80003c5957b0,ffff80003c595700) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80003c5957b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5957b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf66633a19f0, count: -14
ddb{1}> show registers
rdi                                0
rsi                          0x80000    acpi_pdirpa+0x6be71
rbp               0xffff80003c594f90
rbx               0xfffffd800470d1b8
rdx               0xffff800001436d40
rcx               0xffff80002a392020
rax                          0x7ffff    acpi_pdirpa+0x6be70
r8                0xffff80003c594e70
r9                0x8080808080808080
r10               0x5f78ba1f1607dd03
r11               0xa74083dd550ef273
r12                                0
r13               0xfffffd8003f24f00
r14                              0x3
r15                       0xffffffff
rip               0xffffffff810240e5    db_enter+0x25
cs                               0x8
rflags                         0x246
rsp               0xffff80003c594f80
ss                                 0
db_enter+0x25:  addq    $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=179280 pid=25158 tcnt=4 stat=onproc
    flags process=1000000<CHROOT> proc=4000000<THREAD>
    runpri=24, usrpri=83, slppri=24, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff80002a3934a0,0xffff80002a392d00
    process=0xffff80003c54dbb8 user=0xffff80003c590000, vmspace=0xfffffd805f9b5910
    estcpu=33, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 44377  151463  99334      0  2           0                syz-executor
 44377  463023  99334      0  3   0x4000080  fsleep        syz-executor
 10761  253286  16192      0  2           0                syz-executor
 10761  262738  16192      0  3   0x4000080  fsleep        syz-executor
 10761  372452  16192      0  2   0x4000000                syz-executor
 37406  279452  11773      0  2           0                syz-executor
 37406   70336  11773      0  3   0x4000080  fsleep        syz-executor
 32395  489685  30079      0  2           0                syz-executor
 32395   25146  30079      0  7   0x4000000                syz-executor
 25733  399411  20271      0  2           0                syz-executor
 25733  215079  20271      0  3   0x4000080  ttyout        syz-executor
 25158  367321  48280      0  2   0x1000000                syz-executor
*25158  179280  48280      0  7   0x5000000                syz-executor
 25158  513051  48280      0  3   0x5000080  sbwait        syz-executor
 25158  311692  48280      0  3   0x5000080  fsleep        syz-executor
 52470  275089  45423      0  3        0x80  nanoslp       syz-executor
 52470  522196  45423      0  3   0x4000080  kqsel         syz-executor
 52470  186725  45423      0  3   0x4000080  fsleep        syz-executor
 16557  444267      1      0  3    0x100083  ttyin         getty
 56569  365592  96452      0  3        0x82  sbwait        sshd-session
 73571   49888      0      0  3     0x14200  bored         sosplice
 15964   34098      0      0  3     0x14280  nfsidl        nfsio
 10581  252466      0      0  3     0x14280  nfsidl        nfsio
 35502  385350      0      0  3     0x14280  nfsidl        nfsio
 61686   80346      0      0  3     0x14280  nfsidl        nfsio
 87742  109075      0      0  3     0x14280  nfsidl        nfsio
 87587  205062      0      0  3     0x14280  nfsidl        nfsio
 84080  479130      0      0  3     0x14280  nfsidl        nfsio
 14238   65798      0      0  3     0x14280  nfsidl        nfsio
 28478  247277      0      0  3     0x14280  nfsidl        nfsio
 67190  346775      0      0  3     0x14280  nfsidl        nfsio
 50887  200096      0      0  3     0x14280  nfsidl        nfsio
  1848   90490      0      0  3     0x14280  nfsidl        nfsio
 93235  273391      0      0  3     0x14280  nfsidl        nfsio
 31454  373662      0      0  3     0x14280  nfsidl        nfsio
 16134  470014      0      0  3     0x14280  nfsidl        nfsio
 53166  463358      0      0  3     0x14280  nfsidl        nfsio
  5365  398496      0      0  3     0x14280  nfsidl        nfsio
  8633  258564      0      0  3     0x14280  nfsidl        nfsio
 43436  184349      0      0  3     0x14280  nfsidl        nfsio
   104  346501      0      0  3     0x14280  nfsidl        nfsio
 30079   55643  17783      0  3        0x82  nanoslp       syz-executor
 61434  226588  17783      0  3        0x82  wait          syz-executor
 20271  492113  17783      0  3        0x82  nanoslp       syz-executor
 99334  104698  17783      0  3        0x82  nanoslp       syz-executor
 48280  356133  17783      0  3        0x82  nanoslp       syz-executor
 45423  519766  17783      0  3        0x82  nanoslp       syz-executor
 16192   80427  17783      0  3        0x82  nanoslp       syz-executor
 11773  249776  17783      0  3        0x82  nanoslp       syz-executor
 17783  186365  73933      0  3        0x82  kqread        syz-executor
 73933  306422  55985      0  3    0x10008a  sigsusp       ksh
 55985  360904   1768      0  3        0x98  kqread        sshd-session
  1768  470521  96452      0  3        0x92  kqread        sshd-session
 96452  172914      1      0  3        0x88  kqread        sshd
 81564  377416  82936     74  3   0x1100092  bpf           pflogd
 82936   32405      1      0  3        0x80  sbwait        pflogd
 64806  169278  43434     73  3   0x1100090  kqread        syslogd
 43434   44703      1      0  3    0x100082  sbwait        syslogd
 35583  365776      1      0  3    0x100080  kqread        resolvd
 50669  362154  17542     77  3    0x100092  kqread        dhcpleased
  7410   68104  17542     77  3    0x100092  kqread        dhcpleased
 17542  218821      1      0  3        0x80  kqread        dhcpleased
  6649  305373      0      0  3     0x14200  bored         smr
 21821  438701      0      0  2     0x14200                zerothread
 31920  318411      0      0  3     0x14200  aiodoned      aiodoned
  3858  327400      0      0  3     0x14200  syncer        update
 46413  288940      0      0  3     0x14200  cleaner       cleaner
 42471  139792      0      0  3     0x14200  reaper        reaper
 34353   34512      0      0  3     0x14200  pgdaemon      pagedaemon
 47005  233725      0      0  3     0x14200  bored         viomb
 22889  244769      0      0  3  0x40014200  acpi0         acpi0
 68966   54642      0      0  3  0x40014200                idle1
 54277  342399      0      0  3     0x14200  bored         softnet3
 55832  153353      0      0  3     0x14200  bored         softnet2
 80617  240882      0      0  3     0x14200  bored         softnet1
 54235   52704      0      0  2     0x14200                softnet0
 19080  374476      0      0  3     0x14200  bored         systqmp
 18017   36916      0      0  3     0x14200  bored         systq
 52602   86165      0      0  3     0x14200  tmoslp        softclockmp
 95457  370327      0      0  3  0x40014200  tmoslp        softclock
 54450   98530      0      0  3  0x40014200                idle0
     1   10000      0      0  3        0x82  wait          init
     0       0     -1      0  3  0x10010200  scheduler     swapper
ddb{1}> show all locks
Process 25158 (syz-executor) thread 0xffff80002a392020 (179280)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83906af8)
#0  witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1  unp_externalize+0x14e
#2  soreceive+0xc73 sys/kern/uipc_socket.c:1021
#3  recvit+0x40a sys/kern/uipc_syscalls.c:1072
#4  sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
#5  syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5  syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#6  Xsyscall+0x128
exclusive rwlock sbufrcv r = 0 (0xffff800010fd4650)
#0  witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1  rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316
#2  sblock+0xb7 sys/kern/uipc_socket2.c:536
#3  soreceive+0x28e sys/kern/uipc_socket.c:882
#4  recvit+0x40a sys/kern/uipc_syscalls.c:1072
#5  sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
#6  syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6  syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
#7  Xsyscall+0x128
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10203  11095K   11475K 166960K     12395        0
            pcb    18     16K      18K 166960K       405        0
         rtable   232      9K       9K 166960K       517        0
             pf    40     18K      25K 166960K       113        0
         ifaddr    42      7K       8K 166960K        77        0
        ifgroup    59      2K       2K 166960K       131        0
         sysctl     3      1K       1K 166960K         3        0
       counters    66     36K      37K 166960K       126        0
       ioctlops     0      0K       4K 166960K      1559        0
            iov     1      0K      16K 166960K       105        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1335     84K      85K 166960K      2012        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       5K 166960K         8        0
         VM map     2      1K       1K 166960K         2        0
            sem    12      0K       0K 166960K        42        0
        dirhash    15      2K       2K 166960K        21        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    18     65K     106K 166960K       919        0
          sigio     0      0K       0K 166960K        21        0
           proc    73     91K     128K 166960K       599        0
        subproc    72      4K       4K 166960K        72        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       126        0
       in_multi    88      6K       7K 166960K       131        0
    ether_multi     1      0K       0K 166960K         7        0
            mrt     2      0K       0K 166960K         4        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys    91    413K     413K 166960K        91        0
           exec     0      0K       1K 166960K       586        0
   fusefs mount     1     32K      32K 166960K         1        0
     pfkey data     0      0K       0K 166960K         2        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   249     74K      77K 166960K     10183        0
       UVM aobj    82      3K       5K 166960K        87        0
     pinsyscall    45     90K     100K 166960K      2043        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K        46        0
            NDP    13      0K       2K 166960K        50        0
           temp    62   8643K    8714K 166960K     22240        0
         kqueue    14     22K      28K 166960K       141        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       24    0        0     1     0     1     1     0     8    0
rtpcb      120       94    0       90     1     0     1     1     0     8    0
rtentry    112      133    0       33     4     0     4     4     0     8    0
unpcb      144      659    0      637     5     3     2     4     0     8    1
syncache   336       12    0       12     3     2     1     1     0     8    1
tcpqe       32        2    0        2     2     1     1     1     0     8    1
tcpcb      808      298    0      289    12     4     8     8     0     8    7
arp        120       21    0        3     1     0     1     1     0     8    0
inpcb      376     1480    0     1464    33    25     8    22     0     8    6
nd6        136       29    0        5     1     0     1     1     0     8    0
pkpcb       40        5    0        5     3     3     0     1     0     8    0
kcovpl      48        8    0        0     1     0     1     1     0     8    0
ppxss      1168      20    0       20     2     1     1     1     0     8    1
pppxif     1472       3    0        3     1     0     1     1     0     8    1
pffrag     232        1    0        0     1     0     1     1     0   482    0
pffrnode    88        1    0        0     1     0     1     1     0     8    0
pffrent     40        3    0        2     1     0     1     1     0     8    0
pfosfp      40     1428    0     1428     5     5     0     5     0     8    0
pfosfpen   112     1428    0     1428    21    21     0    21     0     8    0
pfrktable  1344       1    0        0     1     0     1     1     0     8    0
pftag       88        1    0        0     1     0     1     1     0     8    0
pfstitem    24       63    0       18     1     0     1     1     0     8    0
pfstkey    128       63    0       18     2     0     2     2     0     8    0
pfstate    376       63    0       18     5     0     5     5     0     8    0
pfrule     1344      28    0       21     2     1     1     2     0     8    0
art_heap8  4096       3    0        0     3     0     3     3     0     8    0
art_heap4  256      572    0      165    31     3    28    31     0     8    0
art_table   32      575    0      165     4     0     4     4     0     8    0
art_node    16      131    0       42     1     0     1     1     0     8    0
sysvmsgpl   40        9    0        6     1     0     1     1     0     8    0
semupl     112        1    0        1     1     1     0     1     0     8    0
semapl     112       39    0       29     1     0     1     1     0     8    0
shmpl      112       84    0        5     3     0     3     3     0     8    0
dirhash    1024      23    0        4     3     0     3     3     0     8    0
dino2pl    256     3063    0     1560    95     0    95    95     0     8    0
ffsino     280     3063    0     1560   109     0   109   109     0     8    0
nchpl      144     4385    0     2693    63     0    63    63     0     8    0
rtmask      32        6    0        6     2     2     0     1     0     8    0
uvmvnodes   80     3490    0        0    72     0    72    72     0     8    0
vnodes     216     3490    0        0   194     0   194   194     0     8    0
namei      1024   14581    0    14581     2     0     2     2     0     8    2
percpumem   16       77    0       30     1     0     1     1     0     8    0
kstatmem   264       66    0       40     4     1     3     3     0     8    1
scsiplug    72        1    0        1     1     0     1     1     0     8    1
scxspl     216    13003    0    13003    12     9     3     8     1     8    3
plimitpl   152      166    0      147     1     0     1     1     0     8    0
sigapl     424     1244    0     1172     9     0     9     9     0     8    0
futexpl     64    12435    0    12430     1     0     1     1     0     8    0
knotepl    120      318    0        0    10     0    10    10     0     8    0
kqueuepl   216      383    0      373     6     5     1     4     0     8    0
pipepl     328      245    0      217     3     0     3     3     0     8    0
fdescpl    504     1203    0     1170     5     0     5     5     0     8    0
filepl     152     8012    0     7780    27    12    15    19     0     8    5
lockfpl    104      387    0      384     1     0     1     1     0     8    0
lockfspl    48      117    0      114     1     0     1     1     0     8    0
sessionpl  144       33    0       23     1     0     1     1     0     8    0
pgrppl      48       48    0       30     1     0     1     1     0     8    0
ucredpl    104     1194    0     1181     1     0     1     1     0     8    0
zombiepl   144     1308    0     1307     2     1     1     1     0     8    0
processpl  1176    1244    0     1172     6     0     6     6     0     8    0
procpl     656     2574    0     2491     8     0     8     8     0     8    0
srpgc       96        4    0        4     1     1     0     1     0     8    0
sockpl     688     2256    0     2215    34    24    10    22     0     8    6
mcl64k     65536      6    0        0     1     0     1     1     0     8    0
mcl16k     16384      4    0        0     1     0     1     1     0     8    0
mcl8k      8192       6    0        0     1     0     1     1     0     8    0
mcl4k      4096     110    0        0    14     0    14    14     0     8    0
mcl2k      2048      25    0        0     4     0     4     4     0     8    0
mtagpl      96      101    0        0     3     0     3     3     0     8    0
mbufpl     256      317    0        0    19     0    19    19     0     8    0
bufpl      280     3832    0      136   264     0   264   264     0     8    0
anonpl      24   187222    0   182578    58    27    31    49     0   184    0
amapchunkpl 152   32544    0    31953    29     4    25    25     0   158    0
amappl16   200     3970    0     3929    36    29     7    16     0     8    4
amappl15   192        3    0        3     1     1     0     1     0     8    0
amappl14   184      137    0      124     1     0     1     1     0     8    0
amappl13   176        2    0        2     1     1     0     1     0     8    0
amappl12   168     1855    0     1822     3     1     2     2     0     8    0
amappl11   160       53    0       39     1     0     1     1     0     8    0
amappl10   152        5    0        5     2     2     0     1     0     8    0
amappl9    144      263    0      263     1     1     0     1     0     8    0
amappl8    136       33    0       30     1     0     1     1     0     8    0
amappl7    128      118    0      104     1     0     1     1     0     8    0
amappl6    120      189    0      184     1     0     1     1     0     8    0
amappl5    112      129    0      119     1     0     1     1     0     8    0
amappl4    104      348    0      327     1     0     1     1     0     8    0
amappl3     96     6516    0     6392     4     0     4     4     0     8    0
amappl2     88      728    0      659     2     0     2     2     0     8    0
amappl1     80    12386    0    11720    17     1    16    16     0     8    0
amappl      88     9709    0     9521     5     0     5     5     0    92    0
dma8192    8192       1    0        1     1     1     0     1     0     8    0
dma4096    4096       3    0        3     2     1     1     1     0     8    1
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       86    0        5     2     0     2     2     0     8    0
uaddrrnd    24     1203    0     1170     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     1203    0     1170     1     0     1     1     0     8    0
vmmpekpl   168    12369    0    12334     4     1     3     3     0     8    0
vmmpepl    168    81364    0    79281   111    12    99   107     0   357    3
vmsppl     456     1202    0     1170     6     1     5     5     0     8    0
rwobjpl     64    28190    0    23549    78     3    75    75     0     8    0
pdppl      4096    2413    0     2340   113    40    73    85     0     8    0
pvpl        32    16612    0        0   134     0   134   134     0   265    0
pmappl     248     1202    0     1170     3     0     3     3     0     8    0
extentpl    40       55    0       38     1     0     1     1     0     8    0
phpool     112      314    0       53     8     0     8     8     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff8383aff0) 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
__mp_lock(ffffffff839068f0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839068f0) at __mp_lock+0x199 sys/kern/kern_lock.c:144
intr_handler(ffff8000358adbb0,ffff800000069c00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553
Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff839068f0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839068f0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x9f sys/dev/kcov.c:158
__mp_lock(ffffffff839068f0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff839068f0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
vn_ioctl(fffffd8069130d30,8020426c,ffff8000358adf30,ffff80003c58f4b8) at vn_ioctl+0x4d sys/kern/vfs_vnops.c:514
sys_ioctl(ffff80003c58f4b8,ffff8000358ae110,ffff8000358ae060) at sys_ioctl+0x5c3
syscall(ffff8000358ae110) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000358ae110) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdf766773430, count: -16
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806965e848,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806965e830,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806965e830,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd8068e917e8,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8068e917e8,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd8068e917e8,fffffd8068e91998,0,0,200,0,5dd0a01baebed554) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd8068e917e8,fffffd8068e91998,ffff80002a392020) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806cbbeb00,ec,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff800010fd4570,ffff80003c595508,ffff80003c5954b8,0,ffff80003c5954f8,ffff80003c59567c,6724f5d63645bebe) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff80002a392020,5,ffff80003c595650,0,ffff80003c595700) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff80002a392020,ffff80003c5957b0,ffff80003c595700) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80003c5957b0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c5957b0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xf66633a19f0, count: -14

Crashes (16563):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/02/23 04:43 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 04:23 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 04:04 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 03:35 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 03:16 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 02:56 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 02:27 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 02:03 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 01:34 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 01:07 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 00:52 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 00:25 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/23 00:07 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 23:49 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 23:25 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 23:03 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 22:41 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 22:24 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 22:08 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 21:40 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 21:17 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 20:53 openbsd 459198ba8b84 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 20:08 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 19:49 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 19:23 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 19:02 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 18:47 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 18:33 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 18:14 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 17:54 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 17:33 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 17:10 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 16:54 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 16:36 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 16:14 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 15:49 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 15:25 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 14:59 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 14:40 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 14:21 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 13:57 openbsd 45a541306066 d34966d1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2025/02/22 13:36 openbsd 45a541306066 d34966d1 .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.