syzbot


witness: reversal: lock order data missing (4)

Status: upstream: reported on 2024/07/10 23:00
Reported-by: syzbot+2b64fa6c069b419fe526@syzkaller.appspotmail.com
First crash: 144d, last: 11d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd witness: reversal: lock order data missing (2) C 173 1148d 1298d 0/3 closed as invalid on 2022/02/22 18:44
openbsd witness: reversal: lock order data missing (3) 8192 144d 992d 3/3 fixed on 2024/07/10 22:52
openbsd witness: reversal: lock order data missing C 667 1298d 1368d 3/3 fixed on 2021/05/14 01:59

Sample crash report:
witness: lock order reversal:
 1st 0xffff8000013296c0 sbufsnd (&so->so_snd.sb_lock)
 2nd 0xfffffd806aca83d0 inode (&ip->i_lock)
lock order [1] sbufsnd (&so->so_snd.sb_lock) -> [2] inode (&ip->i_lock)
lock order data 0xffffffff830beb84 -> 0xffffffff83071f68 is missing
lock order [2] inode (&ip->i_lock) -> [3] sbufrcv (&so->so_rcv.sb_lock)
#0  rw_enter+0x122
#1  sblock+0xb7 sys/kern/uipc_socket2.c:549
#2  soreceive+0x295 sys/kern/uipc_socket.c:945
#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+0xf6 sys/kern/vfs_vnops.c:525
#10 sys_ioctl+0x67c
#11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
#11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
#12 Xsyscall+0x128
lock order [3] sbufrcv (&so->so_rcv.sb_lock) -> [1] sbufsnd (&so->so_snd.sb_lock)
#0  rw_enter+0x122
#1  sblock+0xb7 sys/kern/uipc_socket2.c:549
#2  sosplice+0x3f4 sys/kern/uipc_socket.c:1454
#3  sys_setsockopt+0x2ba sys/kern/uipc_syscalls.c:1228
#4  syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
#4  syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
#5  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:437
witness_checkorder(fffffd806aca83d0,9,0) at witness_checkorder+0x1047
rw_enter(fffffd806aca83c0,1) at rw_enter+0x122
rrw_enter(fffffd806aca83c0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464
VOP_LOCK(fffffd8065bf2130,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8065bf2130,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564
vfs_lookup(ffff800035bb5d88) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff800035bb5d88) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff800001329518,fffffd806aefb500,ffff8000ffff07c8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868
uipc_dgram_send(ffff800001329518,fffffd80639e4900,fffffd806aefb500,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607
sosend(ffff800001329518,fffffd806aefb500,ffff800035bb6018,0,0,0) at sosend+0xa40
sendit(ffff8000ffff07c8,4,ffff800035bb6190,0,ffff800035bb6250) at sendit+0x721 sys/kern/uipc_syscalls.c:786
sys_sendmsg(ffff8000ffff07c8,ffff800035bb6300,ffff800035bb6250) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604
syscall(ffff800035bb6300) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff800035bb6300) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb01cc9c8850, count: -15
ddb{0}> show registers
rdi                                0
rsi                          0x40000    acpi_pdirpa+0x2be71
rbp               0xffff800035bb59e0
rbx               0xfffffd80042c8570
rdx               0xffff8000012a27c0
rcx               0xffff8000ffff07c8
rax                          0x3ffff    acpi_pdirpa+0x2be70
r8                0xffff800035bb58c0
r9                0x8080808080808080
r10               0x8c8948965247e935
r11               0xc55a3ffc589fa42b
r12                                0
r13               0xfffffd8003adfe00
r14                              0x3
r15                       0xffffffff
rip               0xffffffff812ecd15    db_enter+0x25
cs                               0x8
rflags                         0x246
rsp               0xffff800035bb59d0
ss                              0x10
db_enter+0x25:  addq    $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=518915 pid=64629 tcnt=2 stat=onproc
    flags process=0 proc=4000000<THREAD>
    runpri=32, usrpri=50, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff8000ffff1980,0xffff8000ffff02c8
    process=0xffff8000fffea8d0 user=0xffff800035bb1000, vmspace=0xfffffd806ae20028
    estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 27412  332905  93155      0  7           0                syz-executor
 27412  111292  93155      0  3   0x4000080  fsleep        syz-executor
 57275   23246  35468      0  2           0                syz-executor
 57275   76988  35468      0  2   0x4000000                syz-executor
 64629  417076  40051      0  2           0                syz-executor
*64629  518915  40051      0  7   0x4000000                syz-executor
 33986  434480  38331      0  2           0                syz-executor
 33986  302968  38331      0  3   0x4000080  fsleep        syz-executor
 33986  480843  38331      0  3   0x4000080  fsleep        syz-executor
 18832  391348  88496      0  3        0x80  nanoslp       syz-executor
 18832  495135  88496      0  3   0x4000000  smrbar        syz-executor
 18832  255999  88496      0  3   0x4000080  fsleep        syz-executor
 18832   56221  88496      0  3   0x4000080  fsleep        syz-executor
 95608  343245  92584      0  2           0                syz-executor
 95608  500391  92584      0  3   0x4000080  fifor         syz-executor
 95608   47139  92584      0  3   0x4000080  fsleep        syz-executor
 72297  364142  17413      0  3        0x80  nanoslp       syz-executor
 72297  190775  17413      0  3   0x4000080  fsleep        syz-executor
 72297  341865  17413      0  3   0x4000080  netacc        syz-executor
 72297    6698  17413      0  3   0x4000080  fsleep        syz-executor
 75147  395000  14432      0  3        0x80  nanoslp       syz-executor
 75147  260123  14432      0  3   0x4000080  ttyin         syz-executor
 75147  141920  14432      0  3   0x4000080  fsleep        syz-executor
 38331  366990   6524      0  2         0x2                syz-executor
 84010  318672      1      0  3    0x100083  ttyin         getty
 47400  512335      0      0  3     0x14280  nfsidl        nfsio
 86066  514698      0      0  3     0x14280  nfsidl        nfsio
 38347  127697      0      0  3     0x14280  nfsidl        nfsio
 25801  496433      0      0  3     0x14280  nfsidl        nfsio
 17760  216976      0      0  3     0x14280  nfsidl        nfsio
 16773  253756      0      0  3     0x14280  nfsidl        nfsio
 57216  211266      0      0  3     0x14280  nfsidl        nfsio
 64825  366925      0      0  3     0x14280  nfsidl        nfsio
 51322  352718      0      0  3     0x14280  nfsidl        nfsio
 32868  394849      0      0  3     0x14280  nfsidl        nfsio
 31067  301219      0      0  3     0x14280  nfsidl        nfsio
 57108  205474      0      0  3     0x14280  nfsidl        nfsio
 78982  304611      0      0  3     0x14280  nfsidl        nfsio
 10686  327338      0      0  3     0x14280  nfsidl        nfsio
 36135  418431      0      0  3     0x14280  nfsidl        nfsio
 87744   86965      0      0  3     0x14280  nfsidl        nfsio
 45000  111009      0      0  3     0x14280  nfsidl        nfsio
 72407  425906      0      0  3     0x14280  nfsidl        nfsio
 74317  191932      0      0  3     0x14280  nfsidl        nfsio
 31281  291009      0      0  3     0x14280  nfsidl        nfsio
 99828  500166      0      0  3     0x14200  bored         sosplice
 35354  413583  26848      0  3        0x82  netio         sshd-session
  1428  166888      0      0  3     0x14200  acct          acct
 92584  422390   6524      0  3        0x82  nanoslp       syz-executor
 93155  126159   6524      0  3        0x82  nanoslp       syz-executor
 88496  346682   6524      0  3        0x82  nanoslp       syz-executor
 40051  323282   6524      0  3        0x82  nanoslp       syz-executor
 14432  475884   6524      0  3        0x82  nanoslp       syz-executor
 17413  360270   6524      0  3        0x82  nanoslp       syz-executor
 35468     571   6524      0  3        0x82  nanoslp       syz-executor
  6524  184159  31628      0  3        0x82  kqread        syz-executor
 31628   22290  84190      0  3    0x10008a  sigsusp       ksh
 84190  484229  80750      0  3        0x98  kqread        sshd-session
 80750  166398  26848      0  3        0x92  kqread        sshd-session
 26848  147993      1      0  3        0x88  kqread        sshd
 84577  244814  17957     74  3   0x1100092  bpf           pflogd
 17957  267107      1      0  3        0x80  sbwait        pflogd
 52808   18960  81501     73  3   0x1100090  kqread        syslogd
 81501  440803      1      0  3    0x100082  sbwait        syslogd
 93846  340029      1      0  3    0x100080  kqread        resolvd
 42484   86875  23486     77  3    0x100092  kqread        dhcpleased
 72886  355460  23486     77  3    0x100092  kqread        dhcpleased
 23486  254988      1      0  3        0x80  kqread        dhcpleased
 40710  211042      0      0  3     0x14200  bored         smr
 61827  445112      0      0  2     0x14200                zerothread
 49127  280333      0      0  3     0x14200  aiodoned      aiodoned
 54013   28272      0      0  3     0x14200  syncer        update
 78280  325892      0      0  3     0x14200  cleaner       cleaner
 21113  191438      0      0  3     0x14200  reaper        reaper
 22056  181128      0      0  3     0x14200  pgdaemon      pagedaemon
 12081  176370      0      0  3     0x14200  bored         viomb
 87032  351778      0      0  3  0x40014200  acpi0         acpi0
 31835  168225      0      0  3  0x40014200                idle1
 20324  281717      0      0  3     0x14200  bored         softnet3
 16588   22367      0      0  3     0x14200  bored         softnet2
 67447  382130      0      0  3     0x14200  bored         softnet1
 99349  379505      0      0  3     0x14200  bored         softnet0
 55663   87493      0      0  3     0x14200  bored         systqmp
 51399  409181      0      0  3     0x14200  bored         systq
 35045   58150      0      0  3     0x14200  tmoslp        softclockmp
 25757  122101      0      0  3  0x40014200  tmoslp        softclock
 74974  182653      0      0  3  0x40014200                idle0
     1   63685      0      0  3     0x80082  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
Process 27412 (syz-executor) thread 0xffff8000ffff16f8 (332905)
shared rwlock vmmaplk r = 0 (0xfffffd806ae209e0)
#0  witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1  uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1819
#2  uvm_fault_check+0x49 sys/uvm/uvm_fault.c:672
#3  uvm_fault+0xf5 sys/uvm/uvm_fault.c:600
#4  upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
#5  usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
#6  recall_trap+0x8
Process 64629 (syz-executor) thread 0xffff8000ffff07c8 (518915)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836258d8)
#0  witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1  unp_connect+0x26c sys/kern/uipc_usrreq.c:868
#2  uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607
#3  sosend+0xa40
#4  sendit+0x721 sys/kern/uipc_syscalls.c:786
#5  sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604
#6  syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
#6  syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
#7  Xsyscall+0x128
exclusive rwlock sbufsnd r = 0 (0xffff8000013296c0)
#0  witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1  rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2  sblock+0xb7 sys/kern/uipc_socket2.c:549
#3  sosend+0x2ff sys/kern/uipc_socket.c:681
#4  sendit+0x721 sys/kern/uipc_syscalls.c:786
#5  sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604
#6  syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
#6  syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
#7  Xsyscall+0x128
Process 18832 (syz-executor) thread 0xffff80002a0d11f0 (495135)
exclusive rwlock clonelk r = 0 (0xffffffff8343e420)
#0  witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5bb sys/kern/subr_witness.c:1155
#1  if_clone_destroy+0x67
#2  ifioctl+0x5c5
#3  sys_ioctl+0x67c
#4  syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
#4  syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
#5  Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10234  11334K   15340K 166960K     14108        0
            pcb    19     15K      17K 166960K       490        0
         rtable   191      7K       7K 166960K       712        0
             pf    42     19K      27K 166960K       173        0
         ifaddr    40      6K       7K 166960K        75        0
        ifgroup    66      2K       3K 166960K       117        0
         sysctl     3      0K       0K 166960K         5        0
       counters    68     36K      37K 166960K        94        0
       ioctlops     0      0K       4K 166960K      1641        0
            iov     0      0K      24K 166960K        80        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1505     95K      95K 166960K      2740        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       9K 166960K        26        0
         VM map     2      1K       1K 166960K         2        0
            sem    12      0K       1K 166960K        63        0
        dirhash    12      2K       3K 166960K        63        0
           ACPI  1690    195K     286K 166960K     12468        0
      file desc    18     65K      97K 166960K      1538        0
          sigio     1      0K       0K 166960K        35        0
           proc    72     91K     152K 166960K       714        0
        subproc   104      6K       6K 166960K       117        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       342        0
       in_multi    78      5K       7K 166960K       185        0
    ether_multi     1      0K       0K 166960K         9        0
            mrt     0      0K       0K 166960K         5        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys   151    678K     678K 166960K       151        0
           exec     0      0K       1K 166960K       586        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   269     74K      88K 166960K     16043        0
       UVM aobj    83      7K       7K 166960K        89        0
     pinsyscall    45     90K     109K 166960K      2701        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     1      0K       0K 166960K        82        0
            NDP    14      0K       2K 166960K        53        0
           temp    76   6828K    7075K 166960K     54783        0
         kqueue    13     20K      32K 166960K       255        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       24    0        0     1     0     1     1     0     8    0
rtpcb      120      112    0      108     1     0     1     1     0     8    0
rtentry    112      255    0      171     4     0     4     4     0     8    0
unpcb      144     1161    0     1105    11     8     3     6     0     8    0
syncache   336       16    0       16     3     3     0     1     0     8    0
tcpqe       32        3    0        3     2     2     0     1     0     8    0
tcpcb      808      451    0      441     8     6     2     8     0     8    1
arp        120       58    0       41     1     0     1     1     0     8    0
inpcb      336     1983    0     1967    31    26     5    13     0     8    2
nd6        136       35    0       15     1     0     1     1     0     8    0
pkpcb       40        3    0        3     3     3     0     1     0     8    0
kcovpl      48        9    0        1     1     0     1     1     0     8    0
ppxss      1168       4    0        4     3     2     1     1     0     8    1
pffrag     232        9    0        3     1     0     1     1     0   482    0
pffrnode    88        9    0        3     1     0     1     1     0     8    0
pffrent     40       19    0       13     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
pfstitem    24       90    0       26     1     0     1     1     0     8    0
pfstkey    128       90    0       26     3     0     3     3     0     8    0
pfstate    376       90    0       26     7     0     7     7     0     8    0
pfrule     1344      27    0       20     2     0     2     2     0     8    0
art_heap8  4096       2    0        0     2     0     2     2     0     8    0
art_heap4  256      802    0      419    32     8    24    29     0     8    0
art_table   32      804    0      419     4     0     4     4     0     8    0
art_node    16      254    0      180     1     0     1     1     0     8    0
sysvmsgpl   40       39    0        5     1     0     1     1     0     8    0
semupl     112        3    0        3     2     2     0     1     0     8    0
semapl     112       59    0       49     1     0     1     1     0     8    0
shmpl      112       86    0        6     3     0     3     3     0     8    0
dirhash    1024      51    0       34     3     0     3     3     0     8    0
dino2pl    256     4053    0     2560    95     0    95    95     0     8    0
ffsino     272     4053    0     2560   101     0   101   101     0     8    0
nchpl      144     6214    0     4520    63     0    63    63     0     8    0
uvmvnodes   80     5124    0        0   105     0   105   105     0     8    0
vnodes     216     5124    0        0   285     0   285   285     0     8    0
namei      1024   22903    0    22902     5     3     2     2     0     8    1
percpumem   16       61    0       13     1     0     1     1     0     8    0
kstatmem   264       54    0       26     3     1     2     3     0     8    0
scsiplug    72        4    0        4     2     2     0     1     0     8    0
scxspl     216    19933    0    19933    12    11     1     8     1     8    1
plimitpl   152      301    0      284     1     0     1     1     0     8    0
sigapl     424     1870    0     1797     9     0     9     9     0     8    0
futexpl     64    22112    0    22103     1     0     1     1     0     8    0
knotepl    120      561    0        0    17     0    17    17     0     8    0
kqueuepl   216      555    0      546     5     4     1     5     0     8    0
pipepl     320      460    0      431    11     8     3    11     0     8    0
fdescpl    496     1830    0     1797     6     1     5     6     0     8    0
filepl     152    13176    0    12882    22     7    15    19     0     8    1
lockfpl    104      561    0      559     1     0     1     1     0     8    0
lockfspl    48      221    0      219     1     0     1     1     0     8    0
sessionpl  144       37    0       27     1     0     1     1     0     8    0
pgrppl      48       58    0       40     1     0     1     1     0     8    0
ucredpl    104     2138    0     2124     1     0     1     1     0     8    0
zombiepl   144     1847    0     1847     2     1     1     1     0     8    1
processpl  1160    1870    0     1797     7     1     6     6     0     8    0
procpl     648     4175    0     4087     8     0     8     8     0     8    0
srpgc       96       10    0       10     3     3     0     1     0     8    0
sosppl     168        7    0        7     3     2     1     1     0     8    1
sockpl     664     3285    0     3210    42    35     7    15     0     8    0
mcl64k     65536      6    0        0     1     0     1     1     0     8    0
mcl16k     16384      3    0        0     1     0     1     1     0     8    0
mcl12k     12288      2    0        0     1     0     1     1     0     8    0
mcl9k      9216       1    0        0     1     0     1     1     0     8    0
mcl8k      8192      10    0        0     2     0     2     2     0     8    0
mcl4k      4096     153    0        0    20     0    20    20     0     8    0
mcl2k      2048      34    0        0     5     0     5     5     0     8    0
mtagpl      96      102    0        0     3     0     3     3     0     8    0
mbufpl     256      376    0        0    23     0    23    23     0     8    0
bufpl      280     6356    0      182   442     0   442   442     0     8    0
anonpl      24   323706    0   318296    89    31    58    63     0   185   12
amapchunkpl 152   52656    0    51984    36     8    28    33     0   158    1
amappl16   200     8478    0     8442    43    28    15    16     0     8   10
amappl15   192       11    0       11     1     1     0     1     0     8    0
amappl14   184      142    0      129     1     0     1     1     0     8    0
amappl13   176       53    0       53     1     1     0     1     0     8    0
amappl12   168     2501    0     2468     4     1     3     3     0     8    0
amappl11   160       89    0       75     1     0     1     1     0     8    0
amappl10   152       14    0       14     2     2     0     1     0     8    0
amappl9    144      206    0      204     1     0     1     1     0     8    0
amappl8    136       27    0       24     1     0     1     1     0     8    0
amappl7    128      124    0      111     1     0     1     1     0     8    0
amappl6    120      185    0      184     1     0     1     1     0     8    0
amappl5    112      153    0      140     1     0     1     1     0     8    0
amappl4    104      364    0      345     1     0     1     1     0     8    0
amappl3     96     9652    0     9544     3     0     3     3     0     8    0
amappl2     88     2211    0     2118     3     0     3     3     0     8    0
amappl1     80    14832    0    14174    17     1    16    16     0     8    0
amappl      88    15484    0    15284     5     0     5     5     0    92    0
dma32768   32768      1    0        1     1     1     0     1     0     8    0
dma4096    4096       1    0        1     1     1     0     1     0     8    0
dma1024    1024       1    0        0     1     0     1     1     0     8    0
dma256     256        7    0        7     2     2     0     1     0     8    0
dma128     128      255    0      255     3     3     0     1     0     8    0
dma64       64        6    0        6     1     1     0     1     0     8    0
dma32       32        8    0        8     2     2     0     1     0     8    0
dma16       16       21    0       20     1     0     1     1     0     8    0
aobjpl      72       88    0        6     2     0     2     2     0     8    0
uaddrrnd    24     1830    0     1797     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     1830    0     1797     1     0     1     1     0     8    0
vmmpekpl   168    17268    0    17224     3     0     3     3     0     8    0
vmmpepl    168   123801    0   121711   122    20   102   102     0   357    6
vmsppl     448     1829    0     1797     6     2     4     5     0     8    0
rwobjpl     56    41363    0    35083    92     1    91    91     0     8    0
pdppl      4096    3667    0     3594   145    72    73    87     0     8    0
pvpl        32    17616    0        0   143     1   142   142     0   265    0
pmappl     248     1829    0     1797     3     0     3     3     0     8    0
extentpl    40       55    0       38     1     0     1     1     0     8    0
phpool     112      491    0      126    11     0    11    11     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:437
witness_checkorder(fffffd806aca83d0,9,0) at witness_checkorder+0x1047
rw_enter(fffffd806aca83c0,1) at rw_enter+0x122
rrw_enter(fffffd806aca83c0,1) at rrw_enter+0xbe sys/kern/kern_rwlock.c:464
VOP_LOCK(fffffd8065bf2130,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd8065bf2130,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:564
vfs_lookup(ffff800035bb5d88) at vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
namei(ffff800035bb5d88) at namei+0x7aa sys/kern/vfs_lookup.c:250
unp_connect(ffff800001329518,fffffd806aefb500,ffff8000ffff07c8) at unp_connect+0x27d sys/kern/uipc_usrreq.c:868
uipc_dgram_send(ffff800001329518,fffffd80639e4900,fffffd806aefb500,0) at uipc_dgram_send+0x131 sys/kern/uipc_usrreq.c:607
sosend(ffff800001329518,fffffd806aefb500,ffff800035bb6018,0,0,0) at sosend+0xa40
sendit(ffff8000ffff07c8,4,ffff800035bb6190,0,ffff800035bb6250) at sendit+0x721 sys/kern/uipc_syscalls.c:786
sys_sendmsg(ffff8000ffff07c8,ffff800035bb6300,ffff800035bb6250) at sys_sendmsg+0x246 sys/kern/uipc_syscalls.c:604
syscall(ffff800035bb6300) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff800035bb6300) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb01cc9c8850, count: -15
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+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(ffffffff836256d0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline]
__mp_lock(ffffffff836256d0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144
uvm_fault(fffffd806ae208e8,e3a97587000,0,1) at uvm_fault+0x1e0 sys/uvm/uvm_fault.c:622
upageflttrap(ffff80003728af40,e3a97587000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80003728af40) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x796454c0c3c0, count: -9

Crashes (57671):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/20 11:12 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 10:55 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 09:51 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 08:52 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 07:53 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 07:14 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 06:29 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 05:44 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 05:44 openbsd 1511e544c213 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 04:22 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 03:31 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 02:25 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 01:45 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 00:33 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/20 00:32 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 23:03 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 22:02 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 21:45 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 20:42 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 19:55 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 19:35 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 18:32 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 18:08 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 16:52 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 16:01 openbsd 6ddbef639823 7d02db5a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 14:50 openbsd 6ddbef639823 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 14:15 openbsd 6ddbef639823 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 12:28 openbsd 6ddbef639823 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 11:24 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 10:21 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 09:53 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 08:52 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 08:18 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 07:14 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 06:13 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 05:49 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 04:49 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 04:44 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 03:42 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 03:36 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 02:24 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/11/19 02:12 openbsd bd2271cf81e7 571351cb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: reversal: lock order data missing
2024/07/10 23:00 openbsd 2617e43b76b7 c699c2eb .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.