syzbot


assert "dupe == NULL" failed in uvm_pageW.cA

Status: upstream: reported on 2025/12/18 15:08
Reported-by: syzbot+c109485bc1f450a87b04@syzkaller.appspotmail.com
First crash: 5d14h, last: 5d14h

Sample crash report:
login: panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_pageW.cA"R,N IlNiGn:e  SP1L4 4NO
T SLtoOWppERedED  aOtN SYSCALL 83 1401094560 EXIT 0 a
      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*338023  30313      0           0          0    1  syz-executor
 113165  71526      0           0          0    0  syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833b1a7d) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833ef671,ffffffff833e2949,90,ffffffff8338989c) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pagealloc_pg(fffffd80086f6a38,fffffd806c83b338,1000000000,0) at uvm_pagealloc_pg+0x54b sys/uvm/uvm_page.c:707
uvm_pagealloc(fffffd806c83b338,1000000000,0,3) at uvm_pagealloc+0x252 sys/uvm/uvm_page.c:913
pmap_get_ptp(fffffd806c83b300,200000000000) at pmap_get_ptp+0x1d0 sys/arch/amd64/amd64/pmap.c:-1
pmap_enter(fffffd806c83b300,200000000000,6c7e1000,3,22) at pmap_enter+0x386 sys/arch/amd64/amd64/pmap.c:-1
uvm_fault_upper(ffff80002a270ef0,ffff80002a270f28,ffff80002a270df0) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1131
uvm_fault(fffffd800b0635b8,200000000000,0,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635
upageflttrap(ffff80002a271090,200000000240) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a271090) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7a71b350d530, count: 3
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833b1a7d) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833ef671,ffffffff833e2949,90,ffffffff8338989c) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pagealloc_pg(fffffd80086f6a38,fffffd806c83b338,1000000000,0) at uvm_pagealloc_pg+0x54b sys/uvm/uvm_page.c:707
uvm_pagealloc(fffffd806c83b338,1000000000,0,3) at uvm_pagealloc+0x252 sys/uvm/uvm_page.c:913
pmap_get_ptp(fffffd806c83b300,200000000000) at pmap_get_ptp+0x1d0 sys/arch/amd64/amd64/pmap.c:-1
pmap_enter(fffffd806c83b300,200000000000,6c7e1000,3,22) at pmap_enter+0x386 sys/arch/amd64/amd64/pmap.c:-1
uvm_fault_upper(ffff80002a270ef0,ffff80002a270f28,ffff80002a270df0) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1131
uvm_fault(fffffd800b0635b8,200000000000,0,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635
upageflttrap(ffff80002a271090,200000000240) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a271090) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7a71b350d530, count: -12
ddb{1}> show registers
rdi                                0
rsi                              0x1
rbp               0xffff80002a270a10
rbx               0xffff8000299dee07
rdx                                0
rcx               0xffff80003bbe9260
rax               0xffff8000299ddff0
r8                 0x101010101010101
r9                0x8080808080808080
r10               0x2850f3fb7c857d7b
r11               0x6b7d5f7db63f8034
r12               0xffff8000299dec08
r13                                0
r14                                0
r15                              0x1
rip               0xffffffff825bde75    db_enter+0x25
cs                               0x8
rflags                         0x246
rsp               0xffff80002a270a00
ss                                 0
db_enter+0x25:  addq    $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=338023 pid=30313 tcnt=3 stat=onproc
    flags process=0 proc=0
    runpri=86, usrpri=86, slppri=17, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff8000fffe8d18,0xffff80003bbe82e0
    process=0xffff80003c43c028 user=0xffff80002a26c000, vmspace=0xfffffd800b0635b8
    estcpu=36, cpticks=8, pctcpu=0.0, user=7, sys=1, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 99640  402274  19088      0  3        0x80  nanoslp       syz-executor
 99640  303879  19088      0  3   0x4000080  fsleep        syz-executor
 99640  257098  19088      0  2   0x4000000                syz-executor
*30313  338023   8985      0  7           0                syz-executor
 30313  257913   8985      0  3   0x4000080  fsleep        syz-executor
 30313   71783   8985      0  2   0x4000000                syz-executor
 71526  113165   7193      0  7           0                syz-executor
 71526  285919   7193      0  2   0x4000000                syz-executor
  7733   78458  49299      0  3        0x80  nanoslp       syz-executor
  7733  147573  49299      0  3   0x4000080  fsleep        syz-executor
  7733  479606  49299      0  3   0x4000080  fsleep        syz-executor
  3200  274336  61895      0  2           0                syz-executor
  3200  337652  61895      0  3   0x4000080  fsleep        syz-executor
 33980  286772   8962      0  2           0                syz-executor
 33980  135249   8962      0  3   0x4000080  bell          syz-executor
   683  520149  92242      0  3        0x80  nanoslp       syz-executor
   683  444150  92242      0  3   0x4000080  fsleep        syz-executor
   683  124591  92242      0  3   0x4000080  fsleep        syz-executor
   683  116977  92242      0  3   0x4000080  kqsel         syz-executor
 51881  379161      0      0  3     0x14200  acct          acct
 30352  486640      0      0  3     0x14280  nfsidl        nfsio
 48304  144598      0      0  3     0x14280  nfsidl        nfsio
 11138  129860      0      0  3     0x14280  nfsidl        nfsio
 28474  491990      0      0  3     0x14280  nfsidl        nfsio
 79813  403266      0      0  3     0x14280  nfsidl        nfsio
 11893   94764      0      0  3     0x14280  nfsidl        nfsio
  5723  100449      0      0  3     0x14280  nfsidl        nfsio
 56621  189144      0      0  3     0x14280  nfsidl        nfsio
 30224    5901      0      0  3     0x14280  nfsidl        nfsio
 19320  378127      0      0  3     0x14280  nfsidl        nfsio
  3907  272329      0      0  3     0x14280  nfsidl        nfsio
 27369  485938      0      0  3     0x14280  nfsidl        nfsio
 97406  348149      0      0  3     0x14280  nfsidl        nfsio
 99120  245849      0      0  3     0x14280  nfsidl        nfsio
 11546  382575      0      0  3     0x14280  nfsidl        nfsio
 99420   61713      0      0  3     0x14280  nfsidl        nfsio
 72598  309839      0      0  3     0x14280  nfsidl        nfsio
 49282  114224      0      0  3     0x14280  nfsidl        nfsio
 29601  415006      0      0  3     0x14280  nfsidl        nfsio
 49218  156943      0      0  3     0x14280  nfsidl        nfsio
 84149  327825      1      0  3    0x100083  ttyin         getty
 72438  336711  34644      0  3    0x100082  sbwait        arp
 34644  153628  52256      0  3    0x10008a  sigsusp       sh
  8962  418862   8694      0  3        0x82  nanoslp       syz-executor
 92242  198219   8694      0  3        0x82  nanoslp       syz-executor
 19088  294508   8694      0  3        0x82  nanoslp       syz-executor
 49299   27067   8694      0  3        0x82  nanoslp       syz-executor
  7193  520126   8694      0  3        0x82  nanoslp       syz-executor
 52256  264626   8694      0  3        0x82  wait          syz-executor
  8985  242443   8694      0  3        0x82  nanoslp       syz-executor
 61895  237380   8694      0  3        0x82  nanoslp       syz-executor
  8694  222962  45163      0  3        0x82  kqread        syz-executor
 45163   44771  79363      0  3    0x10008a  sigsusp       ksh
 79363  159860  28029      0  3        0x98  kqread        sshd-session
 28029  110793  82577      0  3        0x92  kqread        sshd-session
 82577  466734      1      0  3        0x88  kqread        sshd
 97259  248292  86795     74  3   0x1100092  bpf           pflogd
 86795  335013      1      0  3        0x80  sbwait        pflogd
 59008  139975  86911     73  3   0x1100090  kqread        syslogd
 86911   35169      1      0  3    0x100082  sbwait        syslogd
 10065  286438      1      0  3    0x100080  kqread        resolvd
  5864  366172  24251     77  3    0x100092  kqread        dhcpleased
 60710  143210  24251     77  3    0x100092  kqread        dhcpleased
 24251  104170      1      0  3        0x80  kqread        dhcpleased
 74857  270639      0      0  3     0x14200  bored         smr
 27412  520550      0      0  2     0x14200                zerothread
 51662  487261      0      0  3     0x14200  aiodoned      aiodoned
 56536  201206      0      0  3     0x14200  syncer        update
 80500  163111      0      0  3     0x14200  cleaner       cleaner
 48805  354986      0      0  3     0x14200  reaper        reaper
  2071  359783      0      0  3     0x14200  pgdaemon      pagedaemon
 27328  207138      0      0  3     0x14200  bored         viomb
 69570  487095      0      0  3  0x40014200  acpi0         acpi0
 75337  384926      0      0  3  0x40014200                idle1
 12447  154035      0      0  3     0x14200  bored         softnet1
 29834  233771      0      0  3     0x14200  bored         softnet0
 62865  502734      0      0  3     0x14200  bored         systqmp
 57342  463197      0      0  3     0x14200  bored         systq
 68486  301892      0      0  3     0x14200  tmoslp        softclockmp
 14141  237921      0      0  3  0x40014200  tmoslp        softclock
 41517  161194      0      0  3  0x40014200                idle0
     1  462419      0      0  3     0x80082  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{1}> show all locks
CPU 0:
kernel: protection fault trap, code=0
Faulted in DDB; continuing...
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10201  11086K   11548K 166960K     12351        0
            pcb    18     12K      12K 166960K        79        0
         rtable   148      6K       8K 166960K       379        0
             pf    28     16K      81K 166960K       101        0
         ifaddr    28      4K       7K 166960K        61        0
        ifgroup    43      2K       2K 166960K        89        0
         sysctl     4      1K       9K 166960K        11        0
       counters    64     36K      37K 166960K       122        0
       ioctlops     0      0K       4K 166960K      1694        0
            iov     0      0K      17K 166960K        25        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1426     90K      90K 166960K      1906        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       5K 166960K        11        0
         VM map     2      1K       1K 166960K         2        0
            sem     9      0K       0K 166960K        12        0
        dirhash    12      2K       2K 166960K        18        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    19     69K     114K 166960K       563        0
          sigio     0      0K       0K 166960K        14        0
           proc    72    115K     164K 166960K       579        0
        subproc    72      4K       4K 166960K        73        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K        58        0
       in_multi    53      4K       6K 166960K       104        0
    ether_multi     1      0K       0K 166960K         3        0
            mrt     0      0K       0K 166960K         1        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys    79    360K     360K 166960K        79        0
           exec     0      0K       1K 166960K       424        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   258    170K     180K 166960K      7385        0
       UVM aobj    13      6K       8K 166960K        17        0
     pinsyscall    45     90K     106K 166960K      1718        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K        33        0
            NDP     9      0K       1K 166960K        40        0
           temp    43   8668K    8740K 166960K     17221        0
         kqueue    15     24K      28K 166960K        92        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       69    0       65     1     0     1     1     0     8    0
rtentry    176      114    0       53     5     0     5     5     0     8    0
unpcb      144      392    0      342     4     0     4     4     0     8    2
syncache   336        3    0        3     1     1     0     1     0     8    0
tcpcb      736      192    0      188     7     0     7     7     0     8    6
arp        136       19    0        8     1     0     1     1     0     8    0
inpcb      328      565    0      554     7     0     7     7     0     8    6
nd6        152       25    0       10     1     0     1     1     0     8    0
pkpcb       40        3    0        3     2     1     1     1     0     8    1
kcovpl      48        8    0        0     1     0     1     1     0     8    0
ppxss      1192      23    0       23     2     1     1     1     0     8    1
pppxif     1504       3    0        3     2     1     1     1     0     8    1
pffrag     232        3    0        1     2     1     1     1     0   482    0
pffrnode    88        3    0        1     2     1     1     1     0     8    0
pffrent     40       39    0       37     2     1     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       1    0        1     1     1     0     1     0     8    0
pfanchor   1288       2    0        0     1     0     1     1     0     8    0
pftag       88        1    0        0     1     0     1     1     0     8    0
pfstitem    24       38    0        1     1     0     1     1     0     8    0
pfstkey    128       38    0        1     2     0     2     2     0     8    0
pfstate    448       38    0        1     5     0     5     5     0     8    0
pfrule     1344      29    0       24     2     1     1     2     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      483    0      229    28     1    27    28     0     8    5
art_table   40      484    0      229     5     0     5     5     0     8    0
art_node    32      114    0       59     1     0     1     1     0     8    0
sysvmsgpl   40        4    0        2     1     0     1     1     0     8    0
semapl     112        9    0        2     1     0     1     1     0     8    0
shmpl      112       10    0        2     1     0     1     1     0     8    0
dirhash    1024      21    0        4     3     0     3     3     0     8    0
dino2pl    256     2409    0      906    95     0    95    95     0     8    0
ffsino     296     2409    0      906   117     0   117   117     0     8    0
nchpl      144     3167    0     1470    64     0    64    64     0     8    0
rtmask      32        9    0        9     2     1     1     1     0     8    1
vnodes     216     2851    0        0   159     0   159   159     0     8    0
namei      1024   11121    0    11121     3     2     1     2     0     8    1
percpumem   16       76    0       29     1     0     1     1     0     8    0
vcpupl     3968       3    0        1     1     0     1     1     0     8    0
vmpool     848        4    0        2     1     0     1     1     0     8    0
kstatmem   264       52    0       32     3     1     2     3     0     8    0
scxspl     216    14704    0    14704     4     2     2     2     1     8    2
plimitpl   152      247    0      229     1     0     1     1     0     8    0
sigapl     424      899    0      829     9     1     8     8     0     8    0
knotepl    120      497    0        0    16     0    16    16     0     8    0
kqueuepl   224      227    0      215     5     0     5     5     0     8    4
pipepl     344      155    0      127     3     0     3     3     0     8    0
fdescpl    528      862    0      829     3     0     3     3     0     8    0
filepl     160     5065    0     4805    20     3    17    17     0     8    6
lockfpl    104      450    0      447     4     2     2     3     0     8    1
lockfspl    48      138    0      135     1     0     1     1     0     8    0
sessionpl  144       23    0       14     1     0     1     1     0     8    0
pgrppl      48       40    0       23     1     0     1     1     0     8    0
ucredpl    104      546    0      533     1     0     1     1     0     8    0
zombiepl   144      829    0      829     2     1     1     1     0     8    1
processpl  1232     899    0      829     6     0     6     6     0     8    0
procpl     664     1669    0     1587     8     0     8     8     0     8    0
sosppl     176        2    0        2     1     1     0     1     0     8    0
sockpl     752     1105    0     1040    15     4    11    14     0     8    4
mcl64k     65536      4    0        0     1     0     1     1     0     8    0
mcl9k      9216       2    0        0     1     0     1     1     0     8    0
mcl8k      8192       2    0        0     1     0     1     1     0     8    0
mcl4k      4096     126    0        0    16     0    16    16     0     8    0
mcl2k      2048      46    0        0     6     0     6     6     0     8    0
mtagpl      96       52    0        0     2     0     2     2     0     8    0
mbufpl     256      245    0        0    16     0    16    16     0     8    0
bufpl      280     5761    0      133   402     0   402   402     0     8    0
anonpl      32    11259    0        0    91     0    91    91     0   246    0
amapchunkpl 152   22823    0    22321    31     1    30    31     0   158    6
amappl16   200     2980    0     2948    34    12    22    22     0     8   15
amappl15   192        3    0        3     1     1     0     1     0     8    0
amappl14   184       18    0       18     1     1     0     1     0     8    0
amappl13   176      444    0      442     1     0     1     1     0     8    0
amappl12   168     1235    0     1190     3     0     3     3     0     8    0
amappl11   160        6    0        6     1     1     0     1     0     8    0
amappl10   152       51    0       37     1     0     1     1     0     8    0
amappl9    144      260    0      260     1     1     0     1     0     8    0
amappl8    136       29    0       27     1     0     1     1     0     8    0
amappl7    128       82    0       81     1     0     1     1     0     8    0
amappl6    120      289    0      274     1     0     1     1     0     8    0
amappl5    112       68    0       58     1     0     1     1     0     8    0
amappl4    104      435    0      402     1     0     1     1     0     8    0
amappl3     96     4265    0     4154     4     0     4     4     0     8    1
amappl2     88      545    0      482     2     0     2     2     0     8    0
amappl1     80    10864    0    10246    15     1    14    15     0     8    0
amappl      88     6548    0     6375     5     0     5     5     0    92    0
uvmvnodes   80      114    0        0     3     0     3     3     0     8    0
dma4096    4096       1    0        1     1     1     0     1     0     8    0
dma1024    1024       1    0        0     1     0     1     1     0     8    0
dma256     256        7    0        7     2     2     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       16    0        4     1     0     1     1     0     8    0
uaddrrnd    24      862    0      829     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      862    0      829     1     0     1     1     0     8    0
vmmpekpl   168     8516    0     8473     3     0     3     3     0     8    0
vmmpepl    168    61278    0    59277   115     8   107   107     0   357   11
vmsppl     488      861    0      829     5     0     5     5     0     8    0
rwobjpl     80    19217    0    18123    33     1    32    32     0     8    4
pdppl      4096    1739    0     1664   110    33    77    83     0     8    2
pvpl        32    18560    0        0   150     0   150   150     0   265    0
pmappl     256      865    0      831     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      300    0       40     8     0     8     8     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
x86_ipi_db(ffffffff8388cff0) 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
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x68
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7a94e53a8280, count: 10
ddb{0}> trace
x86_ipi_db(ffffffff8388cff0) 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
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x68
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7a94e53a8280, count: -5
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833b1a7d) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833ef671,ffffffff833e2949,90,ffffffff8338989c) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pagealloc_pg(fffffd80086f6a38,fffffd806c83b338,1000000000,0) at uvm_pagealloc_pg+0x54b sys/uvm/uvm_page.c:707
uvm_pagealloc(fffffd806c83b338,1000000000,0,3) at uvm_pagealloc+0x252 sys/uvm/uvm_page.c:913
pmap_get_ptp(fffffd806c83b300,200000000000) at pmap_get_ptp+0x1d0 sys/arch/amd64/amd64/pmap.c:-1
pmap_enter(fffffd806c83b300,200000000000,6c7e1000,3,22) at pmap_enter+0x386 sys/arch/amd64/amd64/pmap.c:-1
uvm_fault_upper(ffff80002a270ef0,ffff80002a270f28,ffff80002a270df0) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1131
uvm_fault(fffffd800b0635b8,200000000000,0,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635
upageflttrap(ffff80002a271090,200000000240) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a271090) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7a71b350d530, count: 3
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833b1a7d) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833ef671,ffffffff833e2949,90,ffffffff8338989c) at __assert+0x29 sys/kern/subr_prf.c:-1
uvm_pagealloc_pg(fffffd80086f6a38,fffffd806c83b338,1000000000,0) at uvm_pagealloc_pg+0x54b sys/uvm/uvm_page.c:707
uvm_pagealloc(fffffd806c83b338,1000000000,0,3) at uvm_pagealloc+0x252 sys/uvm/uvm_page.c:913
pmap_get_ptp(fffffd806c83b300,200000000000) at pmap_get_ptp+0x1d0 sys/arch/amd64/amd64/pmap.c:-1
pmap_enter(fffffd806c83b300,200000000000,6c7e1000,3,22) at pmap_enter+0x386 sys/arch/amd64/amd64/pmap.c:-1
uvm_fault_upper(ffff80002a270ef0,ffff80002a270f28,ffff80002a270df0) at uvm_fault_upper+0x338 sys/uvm/uvm_fault.c:1131
uvm_fault(fffffd800b0635b8,200000000000,0,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635
upageflttrap(ffff80002a271090,200000000240) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a271090) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7a71b350d530, count: -12

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/18 15:07 openbsd 10e7775f0707 d6d0fdea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore assert "dupe == NULL" failed in uvm_pageW.cA
* Struck through repros no longer work on HEAD.