syzbot


uvm_fault: pmap_page_remove (7)

Status: upstream: reported on 2025/11/11 16:24
Reported-by: syzbot+4f31ad0ccb0a35f3f07a@syzkaller.appspotmail.com
First crash: 66d, last: 19d
Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd uvm_fault: pmap_page_remove (4) -1 1 1367d 1367d 0/3 auto-closed as invalid on 2022/07/20 03:20
openbsd uvm_fault: pmap_page_remove (5) -1 16 459d 769d 0/3 auto-obsoleted due to no activity on 2025/01/12 21:41
openbsd uvm_fault: pmap_page_remove -1 7 2310d 2567d 0/3 auto-closed as invalid on 2019/12/19 05:38
openbsd uvm_fault: pmap_page_remove (6) -1 1 190d 190d 0/3 auto-obsoleted due to no activity on 2025/10/08 23:25
openbsd uvm_fault: pmap_page_remove (3) -1 1 1435d 1435d 0/3 closed as invalid on 2022/02/15 06:33
openbsd uvm_fault: pmap_page_remove (2) -1 5 1987d 2164d 0/3 auto-closed as invalid on 2020/11/06 07:50

Sample crash report:
uvm_fault(0xfffffd800b0637a0, 0x7f8628f4cb80, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at      pmap_page_remove+0x45d: xchgq   %rax,0(%r14,%rcx,1)
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
pmap_page_remove(fffffd80091a5190) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd80091a5190) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree(fffffd806b408ec0) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111
amap_wipeout(fffffd806ecb0e78) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a382a20,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800b0637a0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2530
exit1(ffff8000fffefa08,43,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffefa08,ffff80002a382bf0,ffff80002a382b40) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a382bf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a382bf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76fadc37e420, count: 6
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{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: uvm_fault(0xfffffd800b0637a0, 0x7f8628f4cb80, 0, 2) -> e
ddb{0}> trace
pmap_page_remove(fffffd80091a5190) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd80091a5190) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree(fffffd806b408ec0) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111
amap_wipeout(fffffd806ecb0e78) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a382a20,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800b0637a0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2530
exit1(ffff8000fffefa08,43,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffefa08,ffff80002a382bf0,ffff80002a382b40) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a382bf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a382bf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76fadc37e420, count: -9
ddb{0}> show registers
rdi                                0
rsi                                0
rbp               0xffff80002a382920
rbx               0xfffffd806d92b788
rdx                                0
rcx                   0x7f8000000000
rax                                0
r8                    0x76fadc37e000
r9                                 0
r10               0x7a5162efe62bfcc9
r11               0xc849eb22f1354baa
r12                                0
r13               0x80000000717a4001
r14                      0x628f4cb80
r15               0xfffffd80091a51f8
rip               0xffffffff825096cd    pmap_page_remove+0x45d
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80002a3828a0
ss                              0x10
pmap_page_remove+0x45d: xchgq   %rax,0(%r14,%rcx,1)
ddb{0}> show proc
PROC (syz-executor) tid=456408 pid=93730 tcnt=0 stat=onproc
    flags process=a<EXEC,EXITING> proc=2000<WEXIT>
    runpri=50, usrpri=86, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1
    forw=0xffffffffffffffff, list=0xffff8000ffffd760,0xffff8000363dfa20
    process=0xffff8000ffff5818 user=0xffff80002a37d000, vmspace=0xfffffd800b0637a0
    estcpu=36, cpticks=77, pctcpu=0.7, user=0, sys=2, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 60370  424014   9172      0  2           0                syz-executor
 60370  505497   9172      0  3   0x4000080  fsleep        syz-executor
 73431  308428  27673      0  2           0                syz-executor
 73431  106005  27673      0  3   0x4000080  fsleep        syz-executor
 73431  398834  27673      0  3   0x4000080  fsleep        syz-executor
 28115  384604  53640      0  2        0x10                syz-executor
 28115  349738  53640      0  3   0x4000090  kqread        syz-executor
 28115  477433  53640      0  3   0x4000090  ttyout        syz-executor
 28115  267140  53640      0  3   0x4000090  fsleep        syz-executor
  9172  423928  15610      0  3        0x82  nanoslp       syz-executor
 27882  210092  15610      0  3        0x82  wait          syz-executor
  3914  276310      1      0  3    0x100083  ttyin         getty
  3653  117546  15610      0  3        0x82  wait          syz-executor
  6467  236994  15610      0  3        0x82  wait          syz-executor
 56806  178734      0      0  3     0x14280  nfsidl        nfsio
 75834  494385      0      0  3     0x14280  nfsidl        nfsio
  3138   90878      0      0  3     0x14280  nfsidl        nfsio
 56375  141411      0      0  3     0x14280  nfsidl        nfsio
 36704   52640      0      0  3     0x14280  nfsidl        nfsio
 40498  211088      0      0  3     0x14280  nfsidl        nfsio
 83371  521057      0      0  3     0x14280  nfsidl        nfsio
 66775   83843      0      0  3     0x14280  nfsidl        nfsio
 40170  121155      0      0  3     0x14280  nfsidl        nfsio
 79697  510441      0      0  3     0x14280  nfsidl        nfsio
 30689  351818      0      0  3     0x14280  nfsidl        nfsio
 82701  472385      0      0  3     0x14280  nfsidl        nfsio
 11116  140355      0      0  3     0x14280  nfsidl        nfsio
 88732  169038      0      0  3     0x14280  nfsidl        nfsio
 12860  482168      0      0  3     0x14280  nfsidl        nfsio
 59922  443925      0      0  3     0x14280  nfsidl        nfsio
 48152  367941      0      0  3     0x14280  nfsidl        nfsio
 20507  181044      0      0  3     0x14280  nfsidl        nfsio
 17181  199116      0      0  3     0x14280  nfsidl        nfsio
 18805  103635      0      0  3     0x14280  nfsidl        nfsio
 75779  246849  44619      0  3    0x100082  sbwait        ndp
 44619  302940      1      0  3    0x10008a  sigsusp       sh
 76411  398750  15610      0  3        0x82  wait          syz-executor
 27673  285393  15610      0  3        0x82  nanoslp       syz-executor
 53640  141951  15610      0  3        0x82  nanoslp       syz-executor
 15610  266917  25588      0  2         0x2                syz-executor
 25588   18462  30481      0  3    0x10008a  sigsusp       ksh
 30481  454949  30127      0  3        0x98  kqread        sshd-session
 30127   24840  44475      0  3        0x92  kqread        sshd-session
 44475  118818      1      0  3        0x88  kqread        sshd
 45092  235445   9321     74  3   0x1100092  bpf           pflogd
  9321  430703      1      0  3        0x80  sbwait        pflogd
 74880  505441  50866     73  3   0x1100090  kqread        syslogd
 50866  212439      1      0  3    0x100082  sbwait        syslogd
 16775  138625      1      0  3    0x100080  kqread        resolvd
 87149   54089  72566     77  3    0x100092  kqread        dhcpleased
 83925   60083  72566     77  3    0x100092  kqread        dhcpleased
 72566  328715      1      0  3        0x80  kqread        dhcpleased
 19968  441730      0      0  3     0x14200  bored         smr
 84274  420763      0      0  2     0x14200                zerothread
 23143  475450      0      0  3     0x14200  aiodoned      aiodoned
 11840  123798      0      0  3     0x14200  syncer        update
 67361  152377      0      0  3     0x14200  cleaner       cleaner
 29465  510213      0      0  3     0x14200  reaper        reaper
 40740  287837      0      0  3     0x14200  pgdaemon      pagedaemon
 25241  357106      0      0  3     0x14200  bored         viomb
 88049  501174      0      0  3  0x40014200  acpi0         acpi0
 79586  195353      0      0  7  0x40014200                idle1
 16159  494029      0      0  3     0x14200  bored         softnet1
 16079  361007      0      0  3     0x14200  bored         softnet0
 51156  372077      0      0  3     0x14200  bored         systqmp
 37063  232727      0      0  3     0x14200  bored         systq
 64264  273523      0      0  3     0x14200  tmoslp        softclockmp
 90356   75104      0      0  3  0x40014200  tmoslp        softclock
  7043  230644      0      0  3  0x40014200                idle0
     1  489975      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c86f210)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2  pmap_page_remove+0xca rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2  pmap_page_remove+0xca pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline]
#2  pmap_page_remove+0xca sys/arch/amd64/amd64/pmap.c:1974
#3  uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111
#4  amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1
#5  uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
#6  uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2530
#7  exit1+0x6fc sys/kern/kern_exit.c:260
#8  sys_exit+0x1a sys/kern/kern_exit.c:-1
#9  syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9  syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
#10 Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11086  12092K   13657K 166960K     14966        0
            pcb    17     17K      22K 166960K       382        0
         rtable   203     10K      12K 166960K       668        0
             pf    33     17K      82K 166960K       177        0
         ifaddr    32      5K       8K 166960K       121        0
        ifgroup    52      2K       2K 166960K       204        0
         sysctl     4      1K       9K 166960K        17        0
       counters    66     36K      38K 166960K       278        0
       ioctlops     0      0K       4K 166960K      1789        0
            iov     0      0K      20K 166960K        58        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1410     89K      89K 166960K      2785        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     3      5K       9K 166960K        22        0
         VM map     2      1K       1K 166960K         2        0
            sem    12      0K       0K 166960K        43        0
        dirhash    12      2K       3K 166960K        54        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    18     65K     244K 166960K      1619        0
          sigio     0      0K       0K 166960K        98        0
           proc    73    115K     164K 166960K       855        0
        subproc    72      4K       5K 166960K       119        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       343        0
       in_multi    63      4K       7K 166960K       223        0
    ether_multi     1      0K       0K 166960K        24        0
            mrt     0      0K       0K 166960K        19        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys   247   1102K    1102K 166960K       247        0
           exec     0      0K       1K 166960K       619        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   273    171K     188K 166960K     16472        0
       UVM aobj   116     12K      12K 166960K       126        0
     pinsyscall    44     88K     104K 166960K      2843        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     2      0K       1K 166960K       105        0
            NDP    10      0K       2K 166960K        90        0
           temp    81   8680K    8804K 166960K     68146        0
         kqueue    13     20K      32K 166960K       282        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       26    0        0     1     0     1     1     0     8    0
rtpcb      120      229    0      225     3     2     1     3     0     8    0
rtentry    176      200    0      123     6     0     6     6     0     8    0
unpcb      144     1353    0     1330    16    13     3     8     0     8    2
syncache   336        5    0        5     1     1     0     1     0     8    0
tcpcb      736      414    0      409     7     0     7     7     0     8    6
arp        136       32    0       17     1     0     1     1     0     8    0
inpcb      328     1690    0     1678    23    16     7    12     0     8    6
nd6        152       43    0       27     1     0     1     1     0     8    0
pkpcb       40        3    0        3     2     2     0     1     0     8    0
kcovpl      48       13    0        5     1     0     1     1     0     8    0
ppxss      1192      84    0       84     2     1     1     1     0     8    1
pppxif     1504       4    0        4     2     2     0     1     0     8    0
pffrag     232       14    0        3     1     0     1     1     0   482    0
pffrnode    88       14    0        3     1     0     1     1     0     8    0
pffrent     40       24    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
pfanchor   1288       1    0        0     1     0     1     1     0     8    0
pfstitem    24      107    0       44     1     0     1     1     0     8    0
pfstkey    128      108    0       45     3     0     3     3     0     8    0
pfstate    448      108    0       45     8     0     8     8     0     8    0
pfrule     1344      25    0       20     2     1     1     2     0     8    0
rttmr      136        3    0        3     2     2     0     1     0     8    0
art_heap8  4096       3    0        0     3     0     3     3     0     8    0
art_heap4  256      835    0      504    31     3    28    31     0     8    1
art_table   40      838    0      504     5     0     5     5     0     8    0
art_node    32      200    0      130     1     0     1     1     0     8    0
sysvmsgpl   40       16    0       13     1     0     1     1     0     8    0
semapl     112       37    0       27     1     0     1     1     0     8    0
shmpl      112      116    0        6     4     0     4     4     0     8    0
dirhash    1024      45    0       28     3     0     3     3     0     8    0
dino2pl    256     4405    0     2894    95     0    95    95     0     8    0
ffsino     296     4405    0     2894   117     0   117   117     0     8    0
nchpl      144     6472    0     4758    64     0    64    64     0     8    0
rtmask      32       13    0       13     4     4     0     1     0     8    0
vnodes     216     5208    0        0   290     0   290   290     0     8    0
namei      1024   24218    0    24218     5     3     2     2     0     8    2
percpumem   16      154    0      106     1     0     1     1     0     8    0
vcpupl     3968       4    0        1     1     0     1     1     0     8    0
vmpool     848        7    0        4     1     0     1     1     0     8    0
kstatmem   264      120    0       98     5     3     2     3     0     8    0
scsiplug    72        5    0        5     4     3     1     1     0     8    1
scxspl     216    43958    0    43958    15    14     1     8     1     8    1
plimitpl   152      583    0      564     1     0     1     1     0     8    0
sigapl     424     1894    0     1825     8     0     8     8     0     8    0
knotepl    120      546    0        0    17     0    17    17     0     8    0
kqueuepl   224      627    0      615    10     5     5     5     0     8    4
pipepl     344      294    0      263     6     3     3     6     0     8    0
fdescpl    528     1858    0     1826     3     0     3     3     0     8    0
filepl     160    12753    0    12510    23     9    14    18     0     8    1
lockfpl    104      781    0      777     2     1     1     2     0     8    0
lockfspl    48      232    0      229     1     0     1     1     0     8    0
sessionpl  144       30    0       21     1     0     1     1     0     8    0
pgrppl      48       59    0       41     1     0     1     1     0     8    0
ucredpl    104     2135    0     2120     1     0     1     1     0     8    0
zombiepl   144     2048    0     2043     1     0     1     1     0     8    0
processpl  1232    1894    0     1825     6     0     6     6     0     8    0
procpl     664     4316    0     4241     8     0     8     8     0     8    0
sosppl     176        7    0        7     2     2     0     1     0     8    0
sockpl     752     3314    0     3274    54    44    10    23     0     8    5
mcl64k     65536     18    0        0     3     0     3     3     0     8    0
mcl16k     16384      3    0        0     1     0     1     1     0     8    0
mcl12k     12288      1    0        0     1     0     1     1     0     8    0
mcl9k      9216       1    0        0     1     0     1     1     0     8    0
mcl8k      8192       3    0        0     1     0     1     1     0     8    0
mcl4k      4096     115    0        0    15     0    15    15     0     8    0
mcl2k2     2112       1    0        0     1     0     1     1     0     8    0
mcl2k      2048      51    0        0     6     0     6     6     0     8    0
mtagpl      96      103    0        0     3     0     3     3     0     8    0
mbufpl     256     1153    0        0    73     0    73    73     0     8    0
bufpl      280    18156    0    12020   439     0   439   439     0     8    0
anonpl      32    12164    0        0    98     0    98    98     0   246    0
amapchunkpl 152   55657    0    54979    42    13    29    34     0   158    0
amappl16   200     7175    0     7144    54    39    15    29     0     8    5
amappl15   192        6    0        6     1     1     0     1     0     8    0
amappl14   184        6    0        6     1     1     0     1     0     8    0
amappl13   176      505    0      502     1     0     1     1     0     8    0
amappl12   168     2252    0     2208     3     0     3     3     0     8    0
amappl11   160       31    0       31     1     1     0     1     0     8    0
amappl10   152       47    0       33     1     0     1     1     0     8    0
amappl9    144      263    0      263     1     1     0     1     0     8    0
amappl8    136       31    0       28     1     0     1     1     0     8    0
amappl7    128      129    0      127     1     0     1     1     0     8    0
amappl6    120      344    0      328     1     0     1     1     0     8    0
amappl5    112       86    0       75     1     0     1     1     0     8    0
amappl4    104      461    0      427     2     1     1     2     0     8    0
amappl3     96    10906    0    10783     5     1     4     4     0     8    0
amappl2     88      596    0      533     2     0     2     2     0     8    0
amappl1     80    15853    0    15232    15     1    14    15     0     8    0
amappl      88    15435    0    15248     5     0     5     5     0    92    0
uvmvnodes   80      151    0        0     4     0     4     4     0     8    0
dma8192    8192       2    0        2     2     2     0     1     0     8    0
dma4096    4096       1    0        1     1     1     0     1     0     8    0
dma2048    2048       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      255    0      255     3     3     0     1     0     8    0
dma64       64        8    0        8     2     2     0     1     0     8    0
dma32       32        7    0        7     1     1     0     1     0     8    0
dma16       16       18    0       17     1     0     1     1     0     8    0
aobjpl      72      125    0       10     3     0     3     3     0     8    0
uaddrrnd    24     1858    0     1826     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     1858    0     1826     1     0     1     1     0     8    0
vmmpekpl   168    15736    0    15678     3     0     3     3     0     8    0
vmmpepl    168   123287    0   121268   132    29   103   112     0   357    3
vmsppl     488     1857    0     1825     5     0     5     5     0     8    0
rwobjpl     80    35007    0    33745    38     6    32    36     0     8    0
pdppl      4096    3737    0     3661   113    33    80    83     0     8    4
pvpl        32    19502    0        0   158     1   157   157     0   265    0
pmappl     256     1864    0     1829     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      374    0       45    10     0    10    10     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
pmap_page_remove(fffffd80091a5190) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline]
pmap_page_remove(fffffd80091a5190) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014
uvm_anfree(fffffd806b408ec0) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111
amap_wipeout(fffffd806ecb0e78) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1
uvm_unmap_detach(ffff80002a382a20,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353
uvm_map_teardown(fffffd800b0637a0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2530
exit1(ffff8000fffefa08,43,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260
sys_exit(ffff8000fffefa08,ffff80002a382bf0,ffff80002a382b40) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a382bf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a382bf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76fadc37e420, count: -9
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
x86_ipi_db(ffff8000299ddff0) 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
acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224
sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff8000299ddff0) 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
acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224
sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191
end trace frame: 0x0, count: -5

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/29 03:14 openbsd 6a98c69fc684 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
2025/12/24 11:02 openbsd 1dc30a6de584 5dc09de1 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: pmap_page_remove
2025/12/18 22:56 openbsd 3f23c8878a83 e14dbeb9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
2025/12/11 12:57 openbsd a762189c5efb 48b27acc .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: pmap_page_remove
2025/12/11 07:55 openbsd d004c0aeba6f 48b27acc .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
2025/11/24 05:53 openbsd 879ea5f6fdb7 4fb8ef37 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
2025/11/14 06:05 openbsd 83ff66b05700 07e030de .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: pmap_page_remove
2025/11/11 16:24 openbsd 05de582f27ae 4e1406b4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: pmap_page_remove
* Struck through repros no longer work on HEAD.