syzbot


pool: free list modified: fdescpl

Status: auto-closed as invalid on 2022/04/21 05:57
Reported-by: syzbot+26d2fbcc888c4f258176@syzkaller.appspotmail.com
First crash: 372d, last: 372d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd pool: free list modified: fdescpl (2) C 6 220d 265d 3/3 fixed on 2022/06/27 15:33
openbsd pool: free list modified: fdescpl (3) 5 6d16h 204d 0/3 upstream: reported on 2022/07/07 19:55

Sample crash report:
panic: pool_do_get: fdescpl free list modified: page 0xfffffd8067397000; item addr 0xfffffd80673977c0; offset 0x48=0xdeaf4153
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*358210  24824  32767        0x10          0    1K syz-executor.7
 363269  86362      0         0x2          0    0  syz-fuzzer
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825d022a) at panic+0x177 sys/kern/subr_prf.c:202
pool_do_get(ffffffff82a39eb8,9,ffff80002a53e1e8) at pool_do_get+0x474 sys/kern/subr_pool.c:741
pool_get(ffffffff82a39eb8,9) at pool_get+0xe9 sys/kern/subr_pool.c:584
fdcopy(ffff80002116c010) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline]
fdcopy(ffff80002116c010) at fdcopy+0x44 sys/kern/kern_descrip.c:1111
process_new(ffff800027aff268,ffff80002116c010,1) at process_new+0x13b sys/kern/kern_fork.c:258
fork1(ffff8000ffff4fc8,1,ffffffff81975570,0,ffff80002a53e420,0) at fork1+0x30b sys/kern/kern_fork.c:382
syscall(ffff80002a53e490) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002a53e490) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe38b0, 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{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: pool_do_get: fdescpl free list modified: page 0xfffffd8067397000; item addr 0xfffffd80673977c0; offset 0x48=0xdeaf4153
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825d022a) at panic+0x177 sys/kern/subr_prf.c:202
pool_do_get(ffffffff82a39eb8,9,ffff80002a53e1e8) at pool_do_get+0x474 sys/kern/subr_pool.c:741
pool_get(ffffffff82a39eb8,9) at pool_get+0xe9 sys/kern/subr_pool.c:584
fdcopy(ffff80002116c010) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline]
fdcopy(ffff80002116c010) at fdcopy+0x44 sys/kern/kern_descrip.c:1111
process_new(ffff800027aff268,ffff80002116c010,1) at process_new+0x13b sys/kern/kern_fork.c:258
fork1(ffff8000ffff4fc8,1,ffffffff81975570,0,ffff80002a53e420,0) at fork1+0x30b sys/kern/kern_fork.c:382
syscall(ffff80002a53e490) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002a53e490) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe38b0, count: -9
ddb{1}> show registers
rdi                                0
rsi                              0x1
rbp               0xffff80002a53e030
rbx               0xffff800020ce9bff
rdx                                0
rcx                                0
rax               0xffff8000ffff4fc8
r8                 0x101010101010101
r9                0x8080808080808080
r10               0x63e6b304ec91cc0c
r11               0xab8ddeb0736b36c1
r12               0xffff800020ce9a00
r13                                0
r14                                0
r15                              0x1
rip               0xffffffff810814b8    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff80002a53e020
ss                              0x10
db_enter+0x18:  addq    $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.7) pid=358210 stat=onproc
    flags process=10<SUGID> proc=0
    pri=17, usrpri=86, nice=20
    forw=0xffffffffffffffff, list=0xffff8000ffff5ce8,0xffff8000fffeed40
    process=0xffff80002116c010 user=0xffff80002a539000, vmspace=0xfffffd806ca838b0
    estcpu=36, cpticks=2, pctcpu=0.0
    user=0, sys=1, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 28811  351933  73985  32767  2        0x10                syz-executor.3
 66677   88815  17450  32767  2        0x10                syz-executor.2
 47520  430254   9876  32767  2        0x10                syz-executor.1
 74943    3379  59908  32767  2        0x10                syz-executor.6
 60715  307095  35502  32767  2        0x10                syz-executor.4
 60715  135162  35502  32767  3   0x4000090  fsleep        syz-executor.4
 60715  235159  35502  32767  2   0x4000010                syz-executor.4
 68290  118350    928  32767  2        0x10                syz-executor.0
 68290  143690    928  32767  3   0x4000090  fsleep        syz-executor.0
 60706  415564  18173  32767  3        0x90  nanoslp       syz-executor.5
 60706   72267  18173  32767  3   0x4000090  fsleep        syz-executor.5
 60706  470896  18173  32767  3   0x4000090  fsleep        syz-executor.5
 60706  438910  18173  32767  3   0x4000010  fdlock        syz-executor.5
 73985  233210  52600  32767  3        0x90  nanoslp       syz-executor.3
 52600  280646  86362      0  3        0x82  wait          syz-executor.3
 18173  448946  94095  32767  3        0x90  nanoslp       syz-executor.5
 94095  268972  86362      0  3        0x82  wait          syz-executor.5
*24824  358210  79655  32767  7        0x10                syz-executor.7
 79655  271694  86362      0  3        0x82  wait          syz-executor.7
   928   62473  51548  32767  3        0x90  nanoslp       syz-executor.0
 51548  129235  86362      0  3        0x82  wait          syz-executor.0
 59908  213003  61627  32767  3        0x90  nanoslp       syz-executor.6
 61627  229668  86362      0  3        0x82  wait          syz-executor.6
 35502   38441  37320  32767  3        0x90  nanoslp       syz-executor.4
 37320   61842  86362      0  3        0x82  wait          syz-executor.4
 17450    2387  43230  32767  3        0x90  nanoslp       syz-executor.2
 43230   58493  86362      0  3        0x82  wait          syz-executor.2
  1062  467225      0      0  3     0x14200  bored         sosplice
  9876  345031  20085  32767  3        0x90  nanoslp       syz-executor.1
 20085  327370  86362      0  3        0x82  wait          syz-executor.1
 86362  363269  87823      0  7         0x2                syz-fuzzer
 86362  229185  87823      0  3   0x4000082  thrsleep      syz-fuzzer
 86362  253369  87823      0  3   0x4000082  thrsleep      syz-fuzzer
 86362  511816  87823      0  3   0x4000082  thrsleep      syz-fuzzer
 86362  359618  87823      0  3   0x4000082  thrsleep      syz-fuzzer
 86362  285474  87823      0  3   0x4000082  thrsleep      syz-fuzzer
 86362  460274  87823      0  3   0x4000082  thrsleep      syz-fuzzer
 86362  478617  87823      0  3   0x4000082  thrsleep      syz-fuzzer
 86362  260138  87823      0  3   0x4000082  thrsleep      syz-fuzzer
 87823  420187  11687      0  3    0x10008a  sigsusp       ksh
 11687  470885  14987      0  3        0x9a  poll          sshd
 97567  362737      1      0  3    0x100083  ttyin         getty
 14987  268713      1      0  3        0x88  poll          sshd
 63490  489227  78187     73  3    0x100090  kqread        syslogd
 78187  107545      1      0  3    0x100082  netio         syslogd
  9512   32276      1      0  3    0x100080  kqread        resolvd
 82870  299113  37617     77  3    0x100092  kqread        dhcpleased
  5115   47430  37617     77  3    0x100092  kqread        dhcpleased
 37617  144893      1      0  3        0x80  kqread        dhcpleased
 30875  180695      0      0  3     0x14200  bored         smr
 20137  379103      0      0  2     0x14200                zerothread
 15577  159776      0      0  3     0x14200  aiodoned      aiodoned
 64355  289121      0      0  3     0x14200  syncer        update
 27835  269040      0      0  3     0x14200  cleaner       cleaner
 80267  404279      0      0  3     0x14200  reaper        reaper
 53438  474958      0      0  3     0x14200  pgdaemon      pagedaemon
 52740  370991      0      0  3     0x14200  bored         viomb
 32834  293627      0      0  3  0x40014200  acpi0         acpi0
 70648  318347      0      0  3  0x40014200                idle1
 19458   68024      0      0  3     0x14200  bored         softnet
 90875  514075      0      0  3     0x14200  bored         systqmp
 13833   76150      0      0  3     0x14200  bored         systq
 79577   99922      0      0  3  0x40014200  bored         softclock
 60174  106898      0      0  3  0x40014200                idle0
     1  154926      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex fdescpl r = 0 (0xffffffff82a39ec8)
#0  witness_lock+0x44d
#1  mtx_enter_try+0x100
#2  mtx_enter+0x4b sys/kern/kern_lock.c:266
#3  pool_get+0xbd sys/kern/subr_pool.c:581
#4  fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline]
#4  fdcopy+0x44 sys/kern/kern_descrip.c:1111
#5  process_new+0x13b sys/kern/kern_fork.c:258
#6  fork1+0x30b sys/kern/kern_fork.c:382
#7  syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#7  syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#8  Xsyscall+0x128
Process 60706 (syz-executor.5) thread 0xffff8000fffef510 (438910)
exclusive rwlock sysctllk r = 0 (0xffffffff828d66e0)
#0  witness_lock+0x44d
#1  rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2  sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:233
#3  syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#3  syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#4  Xsyscall+0x128
Process 24824 (syz-executor.7) thread 0xffff8000ffff4fc8 (358210)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82abdf30)
#0  witness_lock+0x44d
#1  syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1  syscall+0x3ef sys/arch/amd64/amd64/trap.c:585
#2  Xsyscall+0x128
exclusive mutex fdescpl r = 0 (0xffffffff82a39ec8)
#0  witness_lock+0x44d
#1  mtx_enter_try+0x100
#2  mtx_enter+0x4b sys/kern/kern_lock.c:266
#3  pool_get+0xbd sys/kern/subr_pool.c:581
#4  fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline]
#4  fdcopy+0x44 sys/kern/kern_descrip.c:1111
#5  process_new+0x13b sys/kern/kern_fork.c:258
#6  fork1+0x30b sys/kern/kern_fork.c:382
#7  syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#7  syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#8  Xsyscall+0x128
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10193   6410K    6418K  78643K     11332        0
            pcb    13     16K      18K  78643K        19        0
         rtable   262      7K       7K  78643K      1668        0
         ifaddr    81     17K      17K  78643K       195        0
         sysctl     2      0K       0K  78643K         2        0
       counters    56     35K      35K  78643K        88        0
       ioctlops     0      0K       2K  78643K       128        0
            iov     0      0K      32K  78643K      1325        0
          mount     1      1K       1K  78643K         1        0
            log     0      0K       0K  78643K         5        0
         vnodes  1271     79K      79K  78643K      3278        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       9K  78643K        85        0
         VM map     2      1K       1K  78643K         2        0
            sem    12      0K       1K  78643K      3182        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1697    195K     286K  78643K     12598        0
      file desc    25     93K     113K  78643K      9582        0
          sigio     0      0K       0K  78643K       379        0
           proc    56     74K     111K  78643K      1454        0
        subproc   104      6K       6K  78643K       312        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
    ip_moptions     2      0K       0K  78643K      1202        0
       in_multi    99      6K       7K  78643K       478        0
    ether_multi     1      0K       0K  78643K        47        0
            mrt     1      0K       0K  78643K         2        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys   205    917K     917K  78643K       205        0
           exec     0      0K       2K  78643K      2469        0
            tdb     3      0K       0K  78643K         3        0
        pagedep     1      8K       8K  78643K         1        0
       inodedep     1     32K      32K  78643K         1        0
         newblk     1      0K       0K  78643K         1        0
        VM swap     7     26K      26K  78643K         7        0
       UVM amap   414     91K     107K  78643K    124652        0
       UVM aobj   131      4K       4K  78643K       134        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
    ip6_options     0      0K       0K  78643K       309        0
            NDP    11      0K       2K  78643K        75        0
           temp   126   4700K    4764K  78643K     27576        0
         kqueue    11     16K      24K  78643K       561        0
      SYN cache     2     16K      16K  78643K         2        0
ddb{1}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache    128       22    0        0     1     0     1     1     0     8    0
rtpcb      120     1652    0     1649    27    26     1     5     0     8    0
rtentry    112      315    0      193     4     0     4     4     0     8    0
unpcb      136     8128    0     8115    65    63     2     9     0     8    1
syncache   296      103    0      103    19    18     1     1     0     8    1
sackhl      24        1    0        1     1     1     0     1     0     8    0
tcpqe       32       34    0       34    14    14     0     1     0     8    0
tcpcb      736    13724    0    13708   243   233    10    25     0     8    8
arp        120       53    0       33     1     0     1     1     0     8    0
ipq         40        9    0        9     5     5     0     1     0     8    0
ipqe        40       25    0       25     5     5     0     1     0     8    0
inpcb      304    18488    0    18471   142   135     7    22     0     8    4
rttmr       72        9    0        7     1     0     1     1     0     8    0
ip6q        72       50    0       49     4     3     1     1     0     8    0
ip6af       40       89    0       89     4     4     0     1     0     8    0
nd6         48       95    0       63     1     0     1     1     0     8    0
kcovpl      48       24    0       16     1     0     1     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256     1344    0      792    40     5    35    37     0     8    0
art_table   32     1345    0      792     5     0     5     5     0     8    0
art_node    16      314    0      202     1     0     1     1     0     8    0
sysvmsgpl   40       64    0       35     1     0     1     1     0     8    0
semupl     112        4    0        4     1     1     0     1     0     8    0
semapl     112     3180    0     3170     1     0     1     1     0     8    0
shmpl      112      131    0        3     4     0     4     4     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256    14135    0    12695    91     0    91    91     0     8    0
ffsino     272    14135    0    12695    97     0    97    97     0     8    0
nchpl      144    26605    0    24977    63     1    62    63     0     8    0
uvmvnodes   80     5926    0        0   121     0   121   121     0     8    0
vnodes     224     5926    0        0   349     0   349   349     0     8    0
namei      1024   92231    0    92231     5     4     1     2     0     8    1
percpumem   16       56    0       16     1     0     1     1     0     8    0
scxspl     216    72255    0    72255    36    34     2     8     0     8    2
plimitpl   152     1859    0     1837     8     7     1     2     0     8    0
sigapl     424     9825    0     9774     7     1     6     7     0     8    0
futexpl     64    86765    0    86761     4     3     1     1     0     8    0
knotepl    112      223    0        0     6     1     5     5     0     8    0
kqueuepl   216     3394    0     3387    50    49     1     5     0     8    0
pipepl     336     1708    0     1680    28    25     3     8     0     8    0
fdescpl    496     9810    0     9774     6     1     5     6     0     8    0
pool(0xffffffff82a39eb8:fdescpl): page inconsistency: page 0xfffffd8067397000; 1 on list, 6 missing, 8 items per page
filepl     152    72700    0    72465   117   104    13    24     0     8    3
lockfpl    104     1641    0     1639     2     1     1     2     0     8    0
lockfspl    48      377    0      375     1     0     1     1     0     8    0
sessionpl  144       39    0       23     1     0     1     1     0     8    0
pgrppl      48      233    0      217     1     0     1     1     0     8    0
ucredpl     96    11524    0    11506     1     0     1     1     0     8    0
zombiepl   144     9774    0     9774     1     0     1     1     0     8    1
processpl  1064    9826    0     9774     4     0     4     4     0     8    0
procpl     672    28712    0    28646    17    10     7     8     0     8    0
srpgc       96        1    0        1     1     1     0     1     0     8    0
sosppl     168      137    0      137    18    17     1     1     0     8    1
sockpl     480    28750    0    28723   567   555    12    38     0     8    8
mcl64k     65536     33    0        0     3     0     3     3     0     8    0
mcl16k     16384     25    0        0     3     0     3     3     0     8    0
mcl12k     12288     25    0        0     2     0     2     2     0     8    0
mcl9k      9216      17    0        0     2     0     2     2     0     8    0
mcl8k      8192      17    0        0     3     1     2     3     0     8    0
mcl4k      4096      25    0        0     3     0     3     3     0     8    0
mcl2k2     2112       6    0        0     1     0     1     1     0     8    0
mcl2k      2048     233    0        0    17     2    15    17     0     8    0
mtagpl      96        2    0        0     1     0     1     1     0     8    0
mbufpl     256     4647    0        0   266     0   266   266     0     8    0
bufpl      288    17028    0    10693   453     0   453   453     0     8    0
anonpl      24  2864609    0  2849652   213   101   112   120     0   186    0
amapchunkpl 152  325692    0   324876   115    80    35    48     0   158    1
amappl16   200    32884    0    32446   197   172    25    37     0     8    1
amappl15   192      154    0      149     1     0     1     1     0     8    0
amappl14   184       10    0        5     1     0     1     1     0     8    0
amappl13   176     1951    0     1946     1     0     1     1     0     8    0
amappl12   168     2544    0     2534     1     0     1     1     0     8    0
amappl11   160     1086    0     1073     1     0     1     1     0     8    0
amappl10   152     2452    0     2446     1     0     1     1     0     8    0
amappl9    144      846    0      837     1     0     1     1     0     8    0
amappl8    136     2443    0     2305     5     0     5     5     0     8    0
amappl7    128     1338    0     1326     1     0     1     1     0     8    0
amappl6    120      623    0      593     2     1     1     2     0     8    0
amappl5    112    10353    0    10329     1     0     1     1     0     8    0
amappl4    104     2446    0     2412     2     1     1     2     0     8    0
amappl3     96     4148    0     4130     1     0     1     1     0     8    0
amappl2     88     4200    0     4151     3     1     2     3     0     8    0
amappl1     80   178272    0   177637    21     6    15    18     0     8    0
amappl      88   123513    0   123235     9     2     7     8     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      133    0        3     3     0     3     3     0     8    0
uaddrrnd    24     9810    0     9774     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     9810    0     9774     1     0     1     1     0     8    0
vmmpekpl   168    79199    0    79150     3     0     3     3     0     8    0
vmmpepl    168   912614    0   909769   220    88   132   139     0   357    1
vmsppl     368     9809    0     9774     4     0     4     4     0     8    0
rwobjpl     56   230152    0   222635   124    15   109   111     0     8    0
pdppl      4096   19627    0    19548   315   234    81    91     0     8    2
pvpl        32  4658019    0  4637629   402   216   186   261     0   265    0
pmappl     248     9809    0     9774     3     0     3     3     0     8    0
extentpl    40       57    0       38     1     0     1     1     0     8    0
phpool     112     1578    0      506    31     0    31    31     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x1a:        addq    $0x8,%rsp
x86_ipi_db(ffffffff82907ff0) at x86_ipi_db+0x1a 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+0x23
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xc sys/dev/kcov.c:144
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff82abdd28) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82abdd28) at __mp_lock+0x122 sys/kern/kern_lock.c:147
kqueue_scan(ffff80002119cb20,8,ffff80002119ca20,ffff80002119cc10,ffff8000ffff6d30,ffff80002119cc6c) at kqueue_scan+0xd8 sys/kern/kern_event.c:1290
sys_kevent(ffff8000ffff6d30,ffff80002119ccd0,ffff80002119cd30) at sys_kevent+0x47b sys/kern/kern_event.c:982
syscall(ffff80002119cda0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002119cda0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffcef60, count: 4
ddb{0}> trace
x86_ipi_db(ffffffff82907ff0) at x86_ipi_db+0x1a 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+0x23
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xc sys/dev/kcov.c:144
softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88
Xsoftclock() at Xsoftclock+0x1f
__mp_lock(ffffffff82abdd28) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82abdd28) at __mp_lock+0x122 sys/kern/kern_lock.c:147
kqueue_scan(ffff80002119cb20,8,ffff80002119ca20,ffff80002119cc10,ffff8000ffff6d30,ffff80002119cc6c) at kqueue_scan+0xd8 sys/kern/kern_event.c:1290
sys_kevent(ffff8000ffff6d30,ffff80002119ccd0,ffff80002119cd30) at sys_kevent+0x47b sys/kern/kern_event.c:982
syscall(ffff80002119cda0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002119cda0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffcef60, count: -11
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825d022a) at panic+0x177 sys/kern/subr_prf.c:202
pool_do_get(ffffffff82a39eb8,9,ffff80002a53e1e8) at pool_do_get+0x474 sys/kern/subr_pool.c:741
pool_get(ffffffff82a39eb8,9) at pool_get+0xe9 sys/kern/subr_pool.c:584
fdcopy(ffff80002116c010) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline]
fdcopy(ffff80002116c010) at fdcopy+0x44 sys/kern/kern_descrip.c:1111
process_new(ffff800027aff268,ffff80002116c010,1) at process_new+0x13b sys/kern/kern_fork.c:258
fork1(ffff8000ffff4fc8,1,ffffffff81975570,0,ffff80002a53e420,0) at fork1+0x30b sys/kern/kern_fork.c:382
syscall(ffff80002a53e490) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002a53e490) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe38b0, count: 6
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440
panic(ffffffff825d022a) at panic+0x177 sys/kern/subr_prf.c:202
pool_do_get(ffffffff82a39eb8,9,ffff80002a53e1e8) at pool_do_get+0x474 sys/kern/subr_pool.c:741
pool_get(ffffffff82a39eb8,9) at pool_get+0xe9 sys/kern/subr_pool.c:584
fdcopy(ffff80002116c010) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline]
fdcopy(ffff80002116c010) at fdcopy+0x44 sys/kern/kern_descrip.c:1111
process_new(ffff800027aff268,ffff80002116c010,1) at process_new+0x13b sys/kern/kern_fork.c:258
fork1(ffff8000ffff4fc8,1,ffffffff81975570,0,ffff80002a53e420,0) at fork1+0x30b sys/kern/kern_fork.c:382
syscall(ffff80002a53e490) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff80002a53e490) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe38b0, count: -9

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-openbsd-setuid 2022/01/21 05:57 openbsd 0a11d68f7ddc ab3d9f17 .config console log report pool: free list modified: fdescpl
* Struck through repros no longer work on HEAD.