syzbot


panic: softclock: invalid to_clock: ADDR (2)

Status: upstream: reported on 2024/08/05 14:41
Reported-by: syzbot+bd9f86d7d84791586102@syzkaller.appspotmail.com
First crash: 42d, last: 42d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd panic: softclock: invalid to_clock: ADDR 58 110d 201d 0/3 auto-obsoleted due to no activity on 2024/07/18 18:55

Sample crash report:
panic: softclock: invalid to_clock: 1635131448
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*  4024  18917      0     0x14000      0x200    0  reaper
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82fae3f1) at panic+0x1cf sys/kern/subr_prf.c:198
softclock(0) at softclock+0x276 sys/kern/kern_timeout.c:759
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
Xspllower() at Xspllower+0x1d
printf(ffffffff83093d00) at printf+0xa3 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807ec83c18,b93a9287000,b93a9486000) at uvm_fault_unwire_locked+0x2f2
uvm_unmap_kill_entry_withlock(fffffd807ec83c18,fffffd8065da7a00,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1861
uvm_map_teardown(fffffd807ec83c18) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd807ec83c18) at uvmspace_free+0xbd sys/uvm/uvm_map.c:3422
reaper(ffff80002a45b958) at reaper+0x225 sys/kern/kern_exit.c:481
end trace frame: 0x0, 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> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: softclock: invalid to_clock: 1635131448
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82fae3f1) at panic+0x1cf sys/kern/subr_prf.c:198
softclock(0) at softclock+0x276 sys/kern/kern_timeout.c:759
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
Xspllower() at Xspllower+0x1d
printf(ffffffff83093d00) at printf+0xa3 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807ec83c18,b93a9287000,b93a9486000) at uvm_fault_unwire_locked+0x2f2
uvm_unmap_kill_entry_withlock(fffffd807ec83c18,fffffd8065da7a00,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1861
uvm_map_teardown(fffffd807ec83c18) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd807ec83c18) at uvmspace_free+0xbd sys/uvm/uvm_map.c:3422
reaper(ffff80002a45b958) at reaper+0x225 sys/kern/kern_exit.c:481
end trace frame: 0x0, count: -12
ddb> show registers
rdi                                0
rsi                              0x1
rbp               0xffff80002a458f10
rbx               0xffffffff835c5790    timeout_todo
rdx                                0
rcx                                0
rax               0xffff80002a45b958
r8                 0x101010101010101
r9                0x8080808080808080
r10                0xd1db1092f47fbb4
r11               0x1263dd99301bae19
r12                                0
r13               0xffffffff83573af0    logsoftc+0x30
r14                                0
r15                              0x1
rip               0xffffffff81c1d1e5    db_enter+0x25
cs                               0x8
rflags                         0x246
rsp               0xffff80002a458f00
ss                              0x10
db_enter+0x25:  addq    $0x8,%rsp
ddb> show proc
PROC (reaper) tid=4024 pid=18917 tcnt=1 stat=onproc
    flags process=14000<NOZOMBIE,SYSTEM> proc=200<SYSTEM>
    runpri=85, usrpri=86, slppri=4, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff80002a40d950,0xffff80002a45b6e0
    process=0xffff80002a410a80 user=0xffff80002a454000, vmspace=0xffffffff834c2750
    estcpu=36, cpticks=100, pctcpu=14.40, user=0, sys=171672, intr=38
ddb> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 73222  455213  41572      0  2   0xc081000                syz-executor
 73222  146232  41572      0  3   0xc003000  suspend       syz-executor
 67823  505009  42871      0  3   0x8000082  wait          syz-executor
 89439  493816  42871      0  3   0x8000082  wait          syz-executor
 41572   89018  42871      0  3   0x8000082  wait          syz-executor
 98413  376127  42871      0  3   0x8000082  wait          syz-executor
 21381  273539  42871      0  3   0x8000082  wait          syz-executor
 89269  240646  42871      0  3   0x8000082  wait          syz-executor
  9915  379156  42871      0  3   0x8000082  wait          syz-executor
 79842  376880      1      0  3  0x18100083  ttyin         getty
 52623  224440      0      0  3     0x14200  acct          acct
 67313  318698      0      0  3     0x14200  bored         sosplice
 42871  436890  61731      0  3   0x8000082  wait          syz-executor
 61731  458518  90289      0  3   0x810008a  sigsusp       ksh
 90289  422391   2737      0  3  0x18000098  kqread        sshd-session
  2737  276898  81050      0  3  0x18000092  kqread        sshd-session
 81050  349352      1      0  3  0x18000088  kqread        sshd
 60070  453264  96614     73  2  0x19100010                syslogd
 96614  333779      1      0  3  0x18100082  sbwait        syslogd
 23967  334167      1      0  3  0x18100080  kqread        resolvd
 77181  479254  62882     77  3  0x18100092  kqread        dhcpleased
 32550  143292  62882     77  3  0x18100092  kqread        dhcpleased
 62882  299266      1      0  3  0x18000080  kqread        dhcpleased
 63070   17353      0      0  2     0x14200                smr
 54844  260138      0      0  2     0x14200                zerothread
 81427  520784      0      0  3     0x14200  aiodoned      aiodoned
 81458  178397      0      0  2     0x14600                update
  4976  442775      0      0  3     0x14200  cleaner       cleaner
*18917    4024      0      0  7     0x14200                reaper
 72899  415308      0      0  3     0x14200  pgdaemon      pagedaemon
 90633   33892      0      0  3     0x14200  bored         viomb
 49572  216011      0      0  3  0x40014200  acpi0         acpi0
 38139  425009      0      0  3     0x14200  bored         softnet3
  3091   85704      0      0  3     0x14200  bored         softnet2
 72642   90108      0      0  3     0x14200  bored         softnet1
 94798  225074      0      0  3     0x14200  bored         softnet0
 73719  334719      0      0  3     0x14200  bored         systqmp
 33803  217854      0      0  3     0x14200  bored         systq
 59753   13450      0      0  2  0x40014200                softclock
 66127  454202      0      0  3  0x40014200                idle0
     1  131144      0      0  3   0x8000082  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb> show all locks
No such command
ddb> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10211  10109K   12202K 166960K     15460        0
            pcb    17     20K      22K 166960K       725        0
         rtable   205     10K      10K 166960K      5114        0
             pf    39     14K      18K 166960K       587        0
         ifaddr    41      8K       9K 166960K       655        0
        ifgroup    58      2K       2K 166960K       709        0
         sysctl     3      0K       2K 166960K         8        0
       counters    32     17K      17K 166960K       200        0
       ioctlops     0      0K       4K 166960K       548        0
            iov     0      0K      18K 166960K       335        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1646    103K     104K 166960K      5445        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2     68K      76K 166960K        61        0
         VM map     2      1K       1K 166960K         2        0
            sem    12      0K       0K 166960K       307        0
        dirhash    15      2K       3K 166960K        72        0
           ACPI  1697    195K     286K 166960K     12548        0
      file desc    11     37K      97K 166960K      4132        0
          sigio     0      0K       0K 166960K        43        0
           proc    59     59K     124K 166960K      4583        0
        subproc    56      3K       3K 166960K      1066        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       317        0
       in_multi    85      6K       7K 166960K      1737        0
    ether_multi     1      0K       0K 166960K        13        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   241   1076K    1076K 166960K       241        0
           exec     0      0K       1K 166960K      2670        0
     pfkey data     0      0K       0K 166960K         3        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   261     91K     107K 166960K     33012        0
       UVM aobj    75      5K       6K 166960K        83        0
     pinsyscall    32     64K     104K 166960K      8825        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K       166        0
            NDP    13      0K       2K 166960K       481        0
           temp    99   6809K    6890K 166960K    118760        0
         kqueue    13     20K      32K 166960K       336        0
      SYN cache     2      8K      16K 166960K         3        0
ddb> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb      120      721    0      718     3     2     1     3     0     8    0
rtentry    112     1805    0     1719     5     2     3     4     0     8    0
unpcb      144     3874    0     3859    15     9     6     8     0     8    5
syncache   336        8    0        8     2     2     0     1     0     8    0
tcpqe       32        3    0        3     1     1     0     1     0     8    0
tcpcb      808     1397    0     1393    23    15     8     8     0     8    7
arp         88      348    0      331     1     0     1     1     0     8    0
ipq         40        9    0        9     1     0     1     1     0     8    1
ipqe        40      120    0      120     1     0     1     1     0     8    1
inpcb      336     4951    0     4944    30    23     7    10     0     8    6
nd6        104      470    0      449     1     0     1     1     0     8    0
pkpcb       40       86    0       86     4     3     1     1     0     8    1
kcovpl      48      152    0      144     1     0     1     1     0     8    0
ppxss      1072      16    0       16     4     3     1     1     0     8    1
pfstscr     40       12    0       12     2     2     0     1     0     8    0
pfosfp      40        1    0        0     1     0     1     1     0     8    0
pfosfpen   112        1    0        0     1     0     1     1     0     8    0
pfrktable  1344       7    0        5     1     0     1     1     0     8    0
pfanchor   1288      11    0        7     1     0     1     1     0     8    0
pftag       88        1    0        0     1     0     1     1     0     8    0
pfqueue    264        1    0        1     1     1     0     1     0     8    0
pfstitem    24        2    0        0     1     0     1     1     0     8    0
pfstkey    128       22    0       20     2     1     1     1     0     8    0
pfstate    344       11    0       10     2     1     1     1     0     8    0
pfrule     1344     106    0       92     2     0     2     2     0     8    0
rttmr      136        1    0        1     1     1     0     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256     7000    0     6627    35     8    27    31     0     8    3
art_table   32     7001    0     6627     4     0     4     4     0     8    0
art_node    16     1799    0     1724     1     0     1     1     0     8    0
sysvmsgpl   40        1    0        0     1     0     1     1     0     8    0
semapl     112      305    0      295     1     0     1     1     0     8    0
shmpl      112       80    0        8     3     0     3     3     0     8    0
dirhash    1024      59    0       39     3     0     3     3     0     8    0
dino2pl    256     6287    0     4515   111     0   111   111     0     8    0
ffsino     240     6287    0     4515   105     0   105   105     0     8    0
nchpl      144     9475    0     8751    68    41    27    67     0     8    0
uvmvnodes   80     8785    0        0   180     0   180   180     0     8    0
vnodes     216     8785    0        0   489     0   489   489     0     8    0
namei      1024   54018    0    54018     5     4     1     2     0     8    1
vcpupl     3904      12    0        0     2     0     2     2     0     8    0
vmpool     664       17    0        5     2     1     1     1     0     8    0
pfiaddrpl  120        3    0        1     1     0     1     1     0     8    0
kstatmem   264      362    0      336     2     0     2     2     0     8    0
scsiplug    72        2    0        2     2     2     0     1     0     8    0
scxspl     216    91460    0    91460    16    13     3     8     1     8    3
plimitpl   152      998    0      980     1     0     1     1     0     8    0
sigapl     424     4129    0     4081     7     1     6     7     0     8    0
futexpl     64    40930    0    40930     1     0     1     1     0     8    1
knotepl    120    71352    0    71305    18     8    10    10     0     8    8
kqueuepl   184      982    0      973     7     3     4     4     0     8    3
pipepl     288      992    0      965    10     7     3     7     0     8    0
fdescpl    432     4109    0     4086     5     1     4     5     0     8    0
filepl     120    32033    0    31846    35    23    12    19     0     8    5
lockfpl    104     1058    0     1056     2     1     1     2     0     8    0
lockfspl    48      374    0      372     1     0     1     1     0     8    0
sessionpl  144      163    0      155     1     0     1     1     0     8    0
pgrppl      48      342    0      326     1     0     1     1     0     8    0
ucredpl    104     5605    0     5590     3     1     2     2     0     8    1
zombiepl   144     5537    0     5529     2     1     1     1     0     8    0
processpl  1088    4129    0     4081     4     0     4     4     0     8    0
procpl     648     7899    0     7836     8     2     6     7     0     8    0
sosppl     168        2    0        2     1     1     0     1     0     8    0
sockpl     504     9724    0     9699   188   176    12    33     0     8    8
mcl64k     65536     93    0       93     2     1     1     1     0     8    1
mcl16k     16384     18    0       18     4     3     1     1     0     8    1
mcl12k     12288     15    0       15     3     2     1     1     0     8    1
mcl9k      9216      10    0       10     3     2     1     1     0     8    1
mcl8k      8192     112    0      112     4     3     1     1     0     8    1
mcl4k      4096      83    0       83     4     3     1     1     0     8    1
mcl2k2     2112       9    0        9     3     2     1     1     0     8    1
mcl2k      2048   14673    0    14577    32    18    14    28     0     8    1
mtagpl      96       92    0       92     1     0     1     1     0     8    1
mbufpl     256    48132    0    47929    47    25    22    27     0     8    7
bufpl      280    14582    0     5793   628     0   628   628     0     8    0
anonpl      24   547938    0   539569   156    80    76    79     0   187   25
amapchunkpl 152  104488    0   103653    86    53    33    42     0   158    0
amappl16   200     8000    0     7971    62    51    11    15     0     8    8
amappl15   192        8    0        8     1     1     0     1     0     8    0
amappl14   184      400    0      390     1     0     1     1     0     8    0
amappl13   176       12    0       12     2     1     1     1     0     8    1
amappl12   168     6980    0     6948     3     1     2     3     0     8    0
amappl11   160       49    0       39     1     0     1     1     0     8    0
amappl10   152       13    0       13     1     1     0     1     0     8    0
amappl9    144      131    0      131     1     1     0     1     0     8    0
amappl8    136       20    0       19     1     0     1     1     0     8    0
amappl7    128      381    0      369     1     0     1     1     0     8    0
amappl6    120     1572    0     1570     1     0     1     1     0     8    0
amappl5    112      689    0      680     1     0     1     1     0     8    0
amappl4    104      717    0      701     1     0     1     1     0     8    0
amappl3     96    20157    0    20018     5     1     4     4     0     8    0
amappl2     88     2575    0     2517     2     0     2     2     0     8    0
amappl1     80    28002    0    27461    16     3    13    14     0     8    1
amappl      88    31502    0    31306     5     0     5     5     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        7    0        7     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       82    0        8     2     0     2     2     0     8    0
uaddrrnd    24     4126    0     4085     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     4126    0     4085     1     0     1     1     0     8    0
vmmpekpl   168    34171    0    34126     3     0     3     3     0     8    0
vmmpepl    168   270950    0   269001   123    28    95    96     0   357   10
vmsppl     344     4125    0     4084     5     1     4     4     0     8    0
rwobjpl     24    79674    0    69874    60     0    60    60     0     8    0
pdppl      4096    8258    0     8180   324   246    78    82     0     8    0
pvpl        32  2046588    0  2027291   836   573   263   382     0   265  102
pmappl     216     4125    0     4084     4     1     3     3     0     8    0
extentpl    40       56    0       38     1     0     1     1     0     8    0
phpool     112      937    0      536    12     0    12    12     0     8    0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82fae3f1) at panic+0x1cf sys/kern/subr_prf.c:198
softclock(0) at softclock+0x276 sys/kern/kern_timeout.c:759
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
Xspllower() at Xspllower+0x1d
printf(ffffffff83093d00) at printf+0xa3 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807ec83c18,b93a9287000,b93a9486000) at uvm_fault_unwire_locked+0x2f2
uvm_unmap_kill_entry_withlock(fffffd807ec83c18,fffffd8065da7a00,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1861
uvm_map_teardown(fffffd807ec83c18) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd807ec83c18) at uvmspace_free+0xbd sys/uvm/uvm_map.c:3422
reaper(ffff80002a45b958) at reaper+0x225 sys/kern/kern_exit.c:481
end trace frame: 0x0, count: -12
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff82fae3f1) at panic+0x1cf sys/kern/subr_prf.c:198
softclock(0) at softclock+0x276 sys/kern/kern_timeout.c:759
softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
Xspllower() at Xspllower+0x1d
printf(ffffffff83093d00) at printf+0xa3 sys/kern/subr_prf.c:532
uvm_fault_unwire_locked(fffffd807ec83c18,b93a9287000,b93a9486000) at uvm_fault_unwire_locked+0x2f2
uvm_unmap_kill_entry_withlock(fffffd807ec83c18,fffffd8065da7a00,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1861
uvm_map_teardown(fffffd807ec83c18) at uvm_map_teardown+0x1c7 sys/uvm/uvm_map.c:2498
uvmspace_free(fffffd807ec83c18) at uvmspace_free+0xbd sys/uvm/uvm_map.c:3422
reaper(ffff80002a45b958) at reaper+0x225 sys/kern/kern_exit.c:481
end trace frame: 0x0, count: -12

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/08/05 14:40 openbsd 127024533874 e35c337f .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main panic: softclock: invalid to_clock: ADDR
* Struck through repros no longer work on HEAD.