syzbot


uvm_fault: pmap_page_remove (5)

Status: upstream: reported on 2023/12/09 17:23
Reported-by: syzbot+0e8e99dda7054813071b@syzkaller.appspotmail.com
First crash: 188d, last: 29d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd uvm_fault: pmap_page_remove (4) 1 786d 786d 0/3 auto-closed as invalid on 2022/07/20 03:20
openbsd uvm_fault: pmap_page_remove 7 1730d 1987d 0/3 auto-closed as invalid on 2019/12/19 05:38
openbsd uvm_fault: pmap_page_remove (3) 1 855d 855d 0/3 closed as invalid on 2022/02/15 06:33
openbsd uvm_fault: pmap_page_remove (2) 5 1407d 1583d 0/3 auto-closed as invalid on 2020/11/06 07:50

Sample crash report:
uvm_fault(0xffffffff82d6d388, 0x7f8220a48df0, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at      pmap_page_remove+0x33d: xchgq   %rax,0(%r14,%rcx,1)
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
  77381  55599      0   0x8000000          0    0  syz-executor.3
*222155  35109      0     0x14000      0x200    1  reaper
pmap_page_remove(fffffd80070b00a0) at pmap_page_remove+0x33d _atomic_swap_64 machine/atomic.h:117 [inline]
pmap_page_remove(fffffd80070b00a0) at pmap_page_remove+0x33d sys/arch/amd64/amd64/pmap.c:1990
uvm_anfree_list(fffffd8068ca5600,0) at uvm_anfree_list+0x98
amap_wipeout(fffffd806d4394a0) at amap_wipeout+0x1af sys/uvm/uvm_amap.c:502
uvm_unmap_detach(ffff80002a155740,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1354
uvm_map_teardown(fffffd80741f1010) at uvm_map_teardown+0x2f8 sys/uvm/uvm_map.c:2554
uvmspace_free(fffffd80741f1010) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461
reaper(ffff80002a148cd8) at reaper+0x197 sys/kern/kern_exit.c:463
end trace frame: 0x0, count: 8
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: uvm_fault(0xffffffff82d6d388, 0x7f8220a48df0, 0, 2) -> e
ddb{1}> trace
pmap_page_remove(fffffd80070b00a0) at pmap_page_remove+0x33d _atomic_swap_64 machine/atomic.h:117 [inline]
pmap_page_remove(fffffd80070b00a0) at pmap_page_remove+0x33d sys/arch/amd64/amd64/pmap.c:1990
uvm_anfree_list(fffffd8068ca5600,0) at uvm_anfree_list+0x98
amap_wipeout(fffffd806d4394a0) at amap_wipeout+0x1af sys/uvm/uvm_amap.c:502
uvm_unmap_detach(ffff80002a155740,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1354
uvm_map_teardown(fffffd80741f1010) at uvm_map_teardown+0x2f8 sys/uvm/uvm_map.c:2554
uvmspace_free(fffffd80741f1010) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461
reaper(ffff80002a148cd8) at reaper+0x197 sys/kern/kern_exit.c:463
end trace frame: 0x0, count: -7
ddb{1}> show registers
rdi                                0
rsi                                0
rbp               0xffff80002a155640
rbx               0xfffffd806827d1c8
rdx                                0
rcx                   0x7f8000000000
rax                                0
r8                                 0
r9                                 0
r10               0x1831fe1c8ca9e6e7
r11               0x85b550fd442c9114
r12                                0
r13               0x800000007f7c7000
r14                      0x220a48df0
r15               0xfffffd80070b0108
rip               0xffffffff81c25bed    pmap_page_remove+0x33d
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80002a1555c0
ss                                 0
pmap_page_remove+0x33d: xchgq   %rax,0(%r14,%rcx,1)
ddb{1}> show proc
PROC (reaper) tid=222155 pid=35109 tcnt=1 stat=onproc
    flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
    runpri=4, usrpri=66, slppri=4, nice=20
    wchan=0x0, wmesg=, ps_single=0x0
    forw=0xffffffffffffffff, list=0xffff80002a149718,0xffff80002a148a58
    process=0xffff80002a15b548 user=0xffff80002a150000, vmspace=0xffffffff82d6d388
    estcpu=16, cpticks=2, pctcpu=13.89, user=0, sys=1, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 38593  246159  38422      0  2   0x8000000                syz-executor.4
 37620  518393  23862      0  2   0x8000000                syz-executor.0
 37620  170537  23862      0  3   0xc000080  msgwait       syz-executor.0
 37620    2477  23862      0  3   0xc000080  fsleep        syz-executor.0
 37620  499139  23862      0  3   0xc000080  fsleep        syz-executor.0
  2258     147   4037      0  2   0x8000000                syz-executor.1
  2258  351913   4037      0  3   0xc000080  fsleep        syz-executor.1
 41429  508436  16527      0  2   0x8000000                syz-executor.5
 41429  242428  16527      0  3   0xc000080  fsleep        syz-executor.5
 55599   77381  27468      0  7   0x8000000                syz-executor.3
 55599  203056  27468      0  3   0xc000000  biowait       syz-executor.3
  4037  478636  47402      0  3   0x8000082  nanoslp       syz-executor.1
 38422  243981  47402      0  3   0x8000082  nanoslp       syz-executor.4
 44600  154745      0      0  3     0x14200  acct          acct
 16353  223879  47402      0  3   0x8000082  nanoslp       syz-executor.6
 14196  202726  47402      0  3   0x8000082  nanoslp       syz-executor.2
 23862  111626  47402      0  3   0x8000082  nanoslp       syz-executor.0
 27468  332675  47402      0  3   0x8000082  nanoslp       syz-executor.3
 14626  418274  47402      0  3   0x8000002  biowait       syz-executor.7
 89081  370335      1      0  3  0x18100083  ttyin         getty
 16527  176681  47402      0  3   0x8000082  nanoslp       syz-executor.5
 70351  244273      0      0  3     0x14200  bored         sosplice
 47402   87375  82687      0  3  0x1a000082  thrsleep      syz-fuzzer
 47402  487707  82687      0  3  0x1e000082  nanoslp       syz-fuzzer
 47402  498475  82687      0  3  0x1e000082  thrsleep      syz-fuzzer
 47402   53291  82687      0  3  0x1e000082  wait          syz-fuzzer
 47402  358169  82687      0  3  0x1e000082  wait          syz-fuzzer
 47402  264030  82687      0  3  0x1e000082  wait          syz-fuzzer
 47402  325760  82687      0  3  0x1e000082  thrsleep      syz-fuzzer
 47402  144957  82687      0  3  0x1e000082  thrsleep      syz-fuzzer
 47402  446756  82687      0  3  0x1e000082  thrsleep      syz-fuzzer
 47402  127971  82687      0  3  0x1e000082  wait          syz-fuzzer
 47402   70641  82687      0  3  0x1e000082  thrsleep      syz-fuzzer
 47402  276004  82687      0  3  0x1e000082  wait          syz-fuzzer
 47402    3602  82687      0  3  0x1e000082  wait          syz-fuzzer
 47402  394400  82687      0  3  0x1e000082  wait          syz-fuzzer
 47402  411709  82687      0  3  0x1e000082  wait          syz-fuzzer
 47402  326263  82687      0  3  0x1e000082  kqread        syz-fuzzer
 82687   18074   5914      0  3   0x810008a  sigsusp       ksh
  5914  132719  35530      0  3  0x1800009a  kqread        sshd
 35530  331169      1      0  3  0x18000088  kqread        sshd
 68573  362690  56184     73  3  0x19100090  kqread        syslogd
 56184  396590      1      0  3  0x18100082  sbwait        syslogd
 36940  506124      1      0  3  0x18100080  kqread        resolvd
 60115  407757  71724     77  3  0x18100092  kqread        dhcpleased
 78548  198805  71724     77  3  0x18100092  kqread        dhcpleased
 71724   73975      1      0  3  0x18000080  kqread        dhcpleased
 24231  472047      0      0  3     0x14200  bored         smr
 63752  289299      0      0  2     0x14200                zerothread
 94527  315481      0      0  3     0x14200  aiodoned      aiodoned
 78279  151577      0      0  3     0x14200  syncer        update
 82059     450      0      0  3     0x14200  cleaner       cleaner
*35109  222155      0      0  7     0x14200                reaper
 98969  205177      0      0  3     0x14200  pgdaemon      pagedaemon
 72276   26675      0      0  3     0x14200  bored         viomb
 70867  118408      0      0  3  0x40014200  acpi0         acpi0
  3981  266525      0      0  3  0x40014200                idle1
 97709   88660      0      0  3     0x14200  bored         softnet3
 29437  202887      0      0  3     0x14200  bored         softnet2
 61584  395519      0      0  3     0x14200  bored         softnet1
 21299   84268      0      0  3     0x14200  bored         softnet0
 65593  286102      0      0  3     0x14200  bored         systqmp
 64159  453966      0      0  3     0x14200  bored         systq
 14187  116313      0      0  3     0x14200  tmoslp        softclockmp
 76045  116864      0      0  3  0x40014200  tmoslp        softclock
 60883  353313      0      0  3  0x40014200                idle0
     1  206104      0      0  3   0x8080082  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8066dfd9c0)
#0  witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x446 sys/kern/subr_witness.c:1157
#1  mtx_enter_try+0x103
#2  mtx_enter+0x4e sys/kern/kern_lock.c:266
#3  pmap_page_remove+0xa7 rcr3 machine/cpufunc.h:139 [inline]
#3  pmap_page_remove+0xa7 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:425 [inline]
#3  pmap_page_remove+0xa7 sys/arch/amd64/amd64/pmap.c:1950
#4  uvm_anfree_list+0x98
#5  amap_wipeout+0x1af sys/uvm/uvm_amap.c:502
#6  uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1354
#7  uvm_map_teardown+0x2f8 sys/uvm/uvm_map.c:2554
#8  uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461
#9  reaper+0x197 sys/kern/kern_exit.c:463
#10 proc_trampoline+0x10
Process 55599 (syz-executor.3) thread 0xffff80002f0f9748 (203056)
Process 14626 (syz-executor.7) thread 0xffff80002a2202b8 (418274)
Process 35109 (reaper) thread 0xffff80002a148cd8 (222155)
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10191   6504K    7101K 166960K     16999        0
            pcb    17     12K      12K 166960K       571        0
         rtable   205     14K      15K 166960K      1499        0
             pf    31      9K      10K 166960K       170        0
         ifaddr    42     15K      16K 166960K       194        0
        ifgroup    56      2K       2K 166960K       274        0
         sysctl     3      0K       1K 166960K        12        0
       counters    64     36K      36K 166960K       176        0
       ioctlops     0      0K       4K 166960K      1666        0
            iov     0      0K      24K 166960K       220        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1432     90K      91K 166960K      4275        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2     20K      21K 166960K        71        0
         VM map     2      1K       1K 166960K         2        0
            sem    12      0K       0K 166960K       248        0
        dirhash    12      2K       2K 166960K       141        0
           ACPI  1697    195K     286K 166960K     12548        0
      file desc    15     53K      89K 166960K      3540        0
          sigio     0      0K       0K 166960K        64        0
           proc    58     79K     127K 166960K      1495        0
        subproc   104      6K       7K 166960K       429        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       572        0
       in_multi    88      6K       7K 166960K       497        0
    ether_multi     1      0K       0K 166960K        32        0
            mrt     1      0K       0K 166960K         7        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      1128        0
     pfkey data     0      0K       0K 166960K         4        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   283    100K     135K 166960K     32255        0
       UVM aobj   125      8K       8K 166960K       133        0
     pinsyscall    35     70K     100K 166960K      5355        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       1K 166960K       248        0
            NDP    11      0K       2K 166960K       133        0
           temp    76   6820K   14756K 166960K     78923        0
         kqueue    12     18K      28K 166960K       517        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      380    0      377     1     0     1     1     0     8    0
rtentry    112      501    0      409     4     1     3     4     0     8    0
unpcb      144     2586    0     2571     6     5     1     4     0     8    0
syncache   336        9    0        9     5     5     0     1     0     8    0
sackhl      24        1    1        1     1     1     0     1     0     8    0
tcpqe       32      168    0      168     3     3     0     1     0     8    0
tcpcb      808     1096    0     1089    23    21     2     8     0     8    1
arp        120       88    0       70     1     0     1     1     0     8    0
inpcb      384     3816    0     3808    28    25     3     8     0     8    2
nd6        136      127    0      104     2     1     1     2     0     8    0
pkpcb       40       24    0       24    10    10     0     1     0     8    0
kcovpl      48       33    0       25     1     0     1     1     0     8    0
ppxss      1168      11    0       11     8     7     1     1     0     8    1
pffrag     232       39    0       38     2     1     1     1     0   482    0
pffrnode    88       33    0       32     2     1     1     1     0     8    0
pffrent     40      288    0      287     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
pfstitem    24      312    0      266     1     0     1     1     0     8    0
pfstkey    128      312    0      266     3     1     2     3     0     8    0
pfstate    376      312    0      266    10     4     6     8     0     8    0
pfrule     1344      21    0       16     2     1     1     2     0     8    0
art_heap8  4096       2    0        1     2     1     1     2     0     8    0
art_heap4  256     1796    0     1389    42    16    26    30     0     8    0
art_table   32     1798    0     1390     5     1     4     4     0     8    0
art_node    16      481    0      401     1     0     1     1     0     8    0
sysvmsgpl   40       21    0        8     1     0     1     1     0     8    0
semupl     112        2    0        2     1     1     0     1     0     8    0
semapl     112      244    0      234     1     0     1     1     0     8    0
shmpl      112      130    0        8     4     0     4     4     0     8    0
dirhash    1024     103    0       86     3     0     3     3     0     8    0
dino2pl    256     7249    0     5718    97     0    97    97     0     8    0
ffsino     272     7249    0     5718   103     0   103   103     0     8    0
nchpl      144    12685    0    12104    67    40    27    67     0     8    0
uvmvnodes   80     9322    0        0   191     0   191   191     0     8    0
vnodes     216     9322    0        0   518     0   518   518     0     8    0
namei      1024   44268    0    44267     9     8     1     2     0     8    0
percpumem   16      102    0       56     1     0     1     1     0     8    0
vcpupl     3904       8    0        2     1     0     1     1     0     8    0
vmpool     696       18    0       12     1     0     1     1     0     8    0
kstatmem   264      134    0      112     2     0     2     2     0     8    0
scsiplug    72       17    0       17     9     8     1     1     0     8    1
scxspl     216    90595    0    90593    21    20     1     8     1     8    0
plimitpl   152      626    0      611     1     0     1     1     0     8    0
sigapl     424     3822    0     3774     9     2     7     8     0     8    0
futexpl     64    57681    0    57677     6     5     1     1     0     8    0
knotepl    120      954    0        0    25     0    25    25     0     8    0
kqueuepl   216     1004    0      995     1     0     1     1     0     8    0
pipepl     320      581    0      553     3     0     3     3     0     8    0
fdescpl    496     3778    0     3752     5     0     5     5     0     8    0
filepl     152    25037    0    24800    19     7    12    14     0     8    0
lockfpl    104      923    0      921     1     0     1     1     0     8    0
lockfspl    48      375    0      373     1     0     1     1     0     8    0
sessionpl  144       50    0       34     1     0     1     1     0     8    0
pgrppl      48       89    0       73     1     0     1     1     0     8    0
ucredpl    104     4734    0     4721     1     0     1     1     0     8    0
zombiepl   144     3776    0     3774     2     1     1     1     0     8    0
processpl  1136    3822    0     3774     8     3     5     6     0     8    0
procpl     656     7609    0     7540    12     3     9     9     0     8    0
srpgc       96       28    0       28    10    10     0     1     0     8    0
sosppl     168       56    0       56    16    15     1     1     0     8    1
sockpl     664     6851    0     6824    35    31     4     9     0     8    1
mcl64k     65536      8    0        0     1     0     1     1     0     8    0
mcl12k     12288      2    0        0     1     0     1     1     0     8    0
mcl9k      9216       2    0        0     1     0     1     1     0     8    0
mcl8k      8192       9    0        0     2     0     2     2     0     8    0
mcl4k      4096       6    0        0     1     0     1     1     0     8    0
mcl2k      2048     572    0        0    38     0    38    38     0     8    0
mtagpl      96       23    0        0     1     0     1     1     0     8    0
mbufpl     256     1043    0        0    61     0    61    61     0     8    0
bufpl      280    14882    0     5559   667     0   667   667     0     8    0
anonpl      24   599451    0   593027   128    59    69    93     0   186    0
amapchunkpl 152  107740    0   107044    88    52    36    42     0   158    1
amappl16   200    13325    0    13185   108    88    20    21     0     8    9
amappl15   192       13    0       13     1     1     0     1     0     8    0
amappl14   184      227    0      216     2     1     1     2     0     8    0
amappl13   176       14    0       14     1     1     0     1     0     8    0
amappl12   168     4813    0     4783     3     1     2     2     0     8    0
amappl11   160       94    0       84     1     0     1     1     0     8    0
amappl10   152       91    0       80     1     0     1     1     0     8    0
amappl9    144      194    0      194     2     2     0     1     0     8    0
amappl8    136      275    0      237     2     0     2     2     0     8    0
amappl7    128       62    0       47     1     0     1     1     0     8    0
amappl6    120      657    0      642     2     1     1     2     0     8    0
amappl5    112      274    0      262     1     0     1     1     0     8    0
amappl4    104      777    0      740     2     0     2     2     0     8    0
amappl3     96    20248    0    20168     3     0     3     3     0     8    0
amappl2     88     4304    0     4231     3     1     2     3     0     8    0
amappl1     80    21534    0    21041    23    11    12    22     0     8    0
amappl      88    31281    0    31085     6     0     6     6     0    92    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        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      132    0        8     3     0     3     3     0     8    0
uaddrrnd    24     3796    0     3764     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     3796    0     3764     1     0     1     1     0     8    0
vmmpekpl   168    28100    0    28035     4     0     4     4     0     8    0
vmmpepl    168   244828    0   242975   200   101    99   113     0   357    7
vmsppl     440     3795    0     3763     7     2     5     5     0     8    0
rwobjpl     56    70220    0    59659   159     7   152   152     0     8    3
pdppl      4096    7599    0     7532   263   191    72    77     0     8    5
pvpl        32    45592    0        0   368     0   368   368     0   265    0
pmappl     248     3795    0     3763     4     1     3     3     0     8    0
extentpl    40       56    0       38     1     0     1     1     0     8    0
phpool     112      661    0      251    12     0    12    12     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x1e:        addq    $0x8,%rsp
x86_ipi_db(ffffffff82c81ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff82e0b828) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82e0b828) at __mp_lock+0x129 sys/kern/kern_lock.c:147
intr_handler(ffff80002a23abb0,ffff80000067b200) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x7ccd13eb3560, count: 9
ddb{0}> trace
x86_ipi_db(ffffffff82c81ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff82e0b828) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82e0b828) at __mp_lock+0x129 sys/kern/kern_lock.c:147
intr_handler(ffff80002a23abb0,ffff80000067b200) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539
Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f
end of kernel
end trace frame: 0x7ccd13eb3560, count: -6
ddb{0}> machine ddbcpu 1
Stopped at      pmap_page_remove+0x33d: xchgq   %rax,0(%r14,%rcx,1)
pmap_page_remove(fffffd80070b00a0) at pmap_page_remove+0x33d _atomic_swap_64 machine/atomic.h:117 [inline]
pmap_page_remove(fffffd80070b00a0) at pmap_page_remove+0x33d sys/arch/amd64/amd64/pmap.c:1990
uvm_anfree_list(fffffd8068ca5600,0) at uvm_anfree_list+0x98
amap_wipeout(fffffd806d4394a0) at amap_wipeout+0x1af sys/uvm/uvm_amap.c:502
uvm_unmap_detach(ffff80002a155740,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1354
uvm_map_teardown(fffffd80741f1010) at uvm_map_teardown+0x2f8 sys/uvm/uvm_map.c:2554
uvmspace_free(fffffd80741f1010) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461
reaper(ffff80002a148cd8) at reaper+0x197 sys/kern/kern_exit.c:463
end trace frame: 0x0, count: 8
ddb{1}> trace
pmap_page_remove(fffffd80070b00a0) at pmap_page_remove+0x33d _atomic_swap_64 machine/atomic.h:117 [inline]
pmap_page_remove(fffffd80070b00a0) at pmap_page_remove+0x33d sys/arch/amd64/amd64/pmap.c:1990
uvm_anfree_list(fffffd8068ca5600,0) at uvm_anfree_list+0x98
amap_wipeout(fffffd806d4394a0) at amap_wipeout+0x1af sys/uvm/uvm_amap.c:502
uvm_unmap_detach(ffff80002a155740,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1354
uvm_map_teardown(fffffd80741f1010) at uvm_map_teardown+0x2f8 sys/uvm/uvm_map.c:2554
uvmspace_free(fffffd80741f1010) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3461
reaper(ffff80002a148cd8) at reaper+0x197 sys/kern/kern_exit.c:463
end trace frame: 0x0, count: -7

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/16 13:58 openbsd b20edd337af0 ef5d53ed .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
2024/05/11 18:16 openbsd 1b9599294b30 9026e142 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: pmap_page_remove
2024/05/09 08:50 openbsd 1b9cf3a3fa61 20bf80e1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
2024/05/07 05:37 openbsd 21e142091427 fa7a5cf0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
2024/05/02 11:05 openbsd 82673a188a32 3ba885bc .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
2024/04/17 05:43 openbsd 489289b76a3a 18f6e127 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: pmap_page_remove
2024/01/27 03:17 openbsd d4c9bc7e07bc cc4a4020 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: pmap_page_remove
2023/12/09 17:22 openbsd 102443c78d43 28b24332 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: pmap_page_remove
* Struck through repros no longer work on HEAD.