syzbot


panic: pr_find_pagehead: mbufpl: page header missing (3)

Status: auto-closed as invalid on 2020/09/23 20:57
Reported-by: syzbot+4187748eb48e2e6e727b@syzkaller.appspotmail.com
First crash: 1603d, last: 1570d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd panic: pr_find_pagehead: mbufpl: page header missing C 10 2126d 2139d 3/3 fixed on 2018/12/28 21:36
openbsd panic: pr_find_pagehead: mbufpl: page header missing (2) 1 1766d 1766d 0/3 auto-closed as invalid on 2020/03/12 10:50

Sample crash report:
panic: pr_find_pagehead: mbufpl: page header missing
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff824249be) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_put(ffffffff82848690,fffffd8052000000) at pool_do_put+0x36a
pool_put(ffffffff82848690,fffffd8052000000) at pool_put+0x4b sys/kern/subr_pool.c:794
m_free(fffffd8052000000) at m_free+0x119 sys/kern/uipc_mbuf.c:459
ml_purge(ffff80001d780998) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline]
ml_purge(ffff80001d780998) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628
ifq_purge(ffff800000ac4a78) at ifq_purge+0x97 sys/net/ifq.c:462
tun_dev_close(5d01,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460
spec_close(ffff80001d780ac0) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd805db598f0,7,fffffd806c3bf960,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174
vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614
fdrop(fffffd80576e61f0,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd80576e61f0,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263
fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195
end trace frame: 0xffff80001d780d10, count: 0
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
pr_find_pagehead: mbufpl: page header missing
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff824249be) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_put(ffffffff82848690,fffffd8052000000) at pool_do_put+0x36a
pool_put(ffffffff82848690,fffffd8052000000) at pool_put+0x4b sys/kern/subr_pool.c:794
m_free(fffffd8052000000) at m_free+0x119 sys/kern/uipc_mbuf.c:459
ml_purge(ffff80001d780998) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline]
ml_purge(ffff80001d780998) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628
ifq_purge(ffff800000ac4a78) at ifq_purge+0x97 sys/net/ifq.c:462
tun_dev_close(5d01,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460
spec_close(ffff80001d780ac0) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd805db598f0,7,fffffd806c3bf960,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174
vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614
fdrop(fffffd80576e61f0,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd80576e61f0,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263
fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195
exit1(ffff80001d6aa388,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197
postsig(ffff80001d6aa388,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline]
postsig(ffff80001d6aa388,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415
userret(ffff80001d6aa388) at userret+0x159 sys/kern/kern_sig.c:1872
syscall(ffff80001d780f40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
syscall(ffff80001d780f40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe3030, count: -19
ddb> show registers
rdi                                0
rsi                              0x1
rbp               0xffff80001d780740
rbx               0xffff80001d7807f0
rdx                              0x2
rcx                                0
rax                              0x1
r8                0xffffffff815644df    kprintf+0x15f
r9                               0x1
r10                              0x2
r11               0x3268c78c28458f85
r12                     0x3000000008
r13               0xffff80001d780750
r14                            0x100
r15                              0x1
rip               0xffffffff8109a488    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff80001d780730
ss                              0x10
db_enter+0x18:  addq    $0x8,%rsp
ddb> show proc
PROC (syz-executor.1) pid=3177 stat=onproc
    flags process=a<EXEC,EXITING,8ORPHAN> proc=2000<WEXIT>
    pri=17, usrpri=74, nice=20
    forw=0xffffffffffffffff, list=0xffff80001d6aa118,0xffff80001d6a9018
    process=0xffff8000ffffb208 user=0xffff80001d77b000, vmspace=0xfffffd806bc0a440
    estcpu=36, cpticks=1, pctcpu=0.0
    user=0, sys=1, intr=0
ddb> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 80072   41595  44985      0  3        0x80  nanosleep     syz-executor.0
 80072  331951  44985      0  3   0x4000080  netcon        syz-executor.0
 80072  283991  44985      0  3   0x4000080  fsleep        syz-executor.0
  6433   51668      0      0  3     0x14280  nfsidl        nfsio
 64931  480297      0      0  3     0x14280  nfsidl        nfsio
 14997  248982      0      0  3     0x14280  nfsidl        nfsio
 52933  252398      0      0  3     0x14280  nfsidl        nfsio
 68246  302938      0      0  3     0x14280  nfsidl        nfsio
 98104  220968      0      0  3     0x14280  nfsidl        nfsio
 32503  487538      0      0  3     0x14280  nfsidl        nfsio
 13256  112104      0      0  3     0x14280  nfsidl        nfsio
 26974  343205      0      0  3     0x14280  nfsidl        nfsio
 36701  137212      0      0  3     0x14280  nfsidl        nfsio
 21296  321568      0      0  3     0x14280  nfsidl        nfsio
 29642  346082      0      0  3     0x14280  nfsidl        nfsio
 89756  142440      0      0  3     0x14280  nfsidl        nfsio
 27572    1613      0      0  3     0x14280  nfsidl        nfsio
  1761  326478      0      0  3     0x14280  nfsidl        nfsio
 79958  227564      0      0  3     0x14280  nfsidl        nfsio
 42397  380607      0      0  3     0x14280  nfsidl        nfsio
 70602  498952      0      0  3     0x14280  nfsidl        nfsio
 30629  290984      0      0  3     0x14280  nfsidl        nfsio
 66572   22385      0      0  3     0x14280  nfsidl        nfsio
 99345  513191      0      0  3     0x14200  acct          acct
 42807   68980      0      0  3     0x14200  bored         sosplice
 44985  120736  61540      0  3        0x82  nanosleep     syz-executor.0
 61540  211440  26367      0  2        0x82                syz-fuzzer
 61540  157180  26367      0  3   0x4000082  nanosleep     syz-fuzzer
 61540  414957  26367      0  3   0x4000082  thrsleep      syz-fuzzer
 61540  196455  26367      0  3   0x4000082  thrsleep      syz-fuzzer
 61540  272952  26367      0  3   0x4000082  thrsleep      syz-fuzzer
 61540  433932  26367      0  3   0x4000082  thrsleep      syz-fuzzer
 61540  119942  26367      0  3   0x4000082  thrsleep      syz-fuzzer
 61540  189193  26367      0  3   0x4000082  thrsleep      syz-fuzzer
 26367  280452  68838      0  3    0x10008a  pause         ksh
 68838  517019  79714      0  3        0x92  select        sshd
 82949  236981      1      0  3    0x100083  ttyin         getty
 79714  291314      1      0  3        0x80  select        sshd
 91015   40602  86468     73  3    0x100090  kqread        syslogd
 86468  190640      1      0  3    0x100082  netio         syslogd
 38121  116437      1     77  3    0x100090  poll          dhclient
 14725  195901      1      0  3        0x80  poll          dhclient
 13870  150548      0      0  3     0x14200  bored         smr
 43013  361617      0      0  2     0x14200                zerothread
 65813  487576      0      0  3     0x14200  aiodoned      aiodoned
 69524  161700      0      0  3     0x14200  syncer        update
 70122  487010      0      0  3     0x14200  cleaner       cleaner
 75820  147745      0      0  3     0x14200  reaper        reaper
 80954  201297      0      0  3     0x14200  pgdaemon      pagedaemon
 52166  374145      0      0  3     0x14200  bored         crynlk
 81340  129215      0      0  3     0x14200  bored         crypto
 54175  145249      0      0  3  0x40014200  acpi0         acpi0
 20855  245864      0      0  3     0x14200  bored         softnet
 77077  390391      0      0  3     0x14200  bored         systqmp
 21801  283313      0      0  3     0x14200  bored         systq
 91373  507621      0      0  3  0x40014200  bored         softclock
 47282  203565      0      0  3  0x40014200                idle0
     1  208989      0      0  3        0x82  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  9535   6506K    6762K  78643K     12477        0
            pcb    13      8K       9K  78643K      1132        0
         rtable   130     10K      12K  78643K      1113        0
         ifaddr   133     28K      28K  78643K       437        0
       counters    21     16K      16K  78643K        47        0
       ioctlops     0      0K       4K  78643K       230        0
            iov     0      0K      20K  78643K       231        0
          mount     1      1K       1K  78643K         1        0
         vnodes  1218     77K      77K  78643K      1811        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       5K  78643K        14        0
         VM map     2      0K       0K  78643K         2        0
            sem    12      0K       0K  78643K       166        0
        dirhash     9      1K       2K  78643K        12        0
           ACPI  1809    195K     288K  78643K     12938        0
      file desc     5     13K      25K  78643K      1151        0
          sigio     0      0K       0K  78643K        17        0
           proc    50     38K      63K  78643K       503        0
        subproc    23      1K       2K  78643K        38        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
    ip_moptions     0      0K       0K  78643K        85        0
       in_multi   159      6K       6K  78643K       413        0
    ether_multi     1      0K       0K  78643K        33        0
            mrt     0      0K       0K  78643K        14        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys    55    254K     254K  78643K        55        0
           exec     0      0K       1K  78643K       298        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   168    203K     203K  78643K      4029        0
       UVM aobj    95      8K       8K  78643K       106        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
    ip6_options     0      0K       0K  78643K       173        0
            NDP    15      0K       0K  78643K        74        0
           temp   162   3900K    3965K  78643K     60863        0
         kqueue     4      6K      24K  78643K        58        0
      SYN cache     2     16K      16K  78643K         2        0
ddb> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp         64       10    0        3     1     0     1     1     0     8    0
rtpcb       80      100    0       98     1     0     1     1     0     8    0
rtentry    112      119    0       79     2     0     2     2     0     8    0
unpcb      120      431    0      423     1     0     1     1     0     8    0
syncache   264       17    0       17     5     5     0     1     0     8    0
sackhl      24        1    0        1     1     1     0     1     0     8    0
tcpqe       32       62    0       62     2     2     0     1     0     8    0
tcpcb      544     1033    0     1028     2     1     1     2     0     8    0
ipq         40        9    0        9     4     3     1     1     0     8    1
ipqe        40      192    0      192     4     3     1     1     0     8    1
inpcb      296     2735    0     2727     4     2     2     3     0     8    1
rttmr       72        4    0        4     2     2     0     1     0     8    0
ip6q        72        4    0        4     2     2     0     1     0     8    0
ip6af       40       12    0       12     2     2     0     1     0     8    0
nd6         48       49    0       47     1     0     1     1     0     8    0
pkpcb       40       18    0       18     4     4     0     1     0     8    0
ppxss      1128       3    0        3     3     3     0     1     0     8    0
pfstscr     40       10    0        5     1     0     1     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     264    0      252     6     5     1     2     0     8    0
pftag       88       36    0       32     3     2     1     1     0     8    0
pfstitem    24       16    0        4     1     0     1     1     0     8    0
pfstkey    112       22    0       10     1     0     1     1     0     8    0
pfstate    328       11    0        5     1     0     1     1     0     8    0
pfrule     1360      72    0       42     3     0     3     3     0     8    0
art_heap8  4096       2    0        0     2     0     2     2     0     8    0
art_heap4  256      449    0      282    15     3    12    14     0     8    0
art_table   32      451    0      282     2     0     2     2     0     8    0
art_node    16      118    0       82     1     0     1     1     0     8    0
sysvmsgpl   40       46    0       15     1     0     1     1     0     8    0
semapl     112      164    0      154     1     0     1     1     0     8    0
shmpl      112      104    0       12     3     0     3     3     0     8    0
dirhash    1024      17    0       10     3     1     2     3     0     8    0
dino2pl    256     3087    0     1695    88     0    88    88     0     8    0
ffsino     240     3087    0     1695    83     0    83    83     0     8    0
nchpl      144     4945    0     3352    60     0    60    60     0     8    0
uvmvnodes   72     3519    0        0    64     0    64    64     0     8    0
vnodes     208     3519    0        0   186     0   186   186     0     8    0
namei      1024   14023    0    14023     2     1     1     1     0     8    1
vcpupl     1984      20    0        0     3     0     3     3     0     8    0
vmpool     528       23    0        3     2     0     2     2     0     8    0
pfiaddrpl  120      116    0       92     3     2     1     1     0     8    0
scxspl     192    16036    0    16036     1     0     1     1     0     8    1
plimitpl   152      127    0      120     1     0     1     1     0     8    0
sigapl     424     1359    0     1309     6     0     6     6     0     8    0
futexpl     56    26536    0    26535     2     1     1     1     0     8    0
knotepl    112      184    0      164     2     1     1     2     0     8    0
kqueuepl   144      160    0      154     1     0     1     1     0     8    0
pipelkpl    16      198    0      188     1     0     1     1     0     8    0
pipepl     120      396    0      378     1     0     1     1     0     8    0
fdescpl    432     1323    0     1309     2     0     2     2     0     8    0
filepl     120     9421    0     9329     4     0     4     4     0     8    0
lockfpl    104      311    0      310     1     0     1     1     0     8    0
lockfspl    48      116    0      115     1     0     1     1     0     8    0
sessionpl  112       17    0        7     1     0     1     1     0     8    0
pgrppl      48      123    0      113     1     0     1     1     0     8    0
ucredpl     96      897    0      890     1     0     1     1     0     8    0
zombiepl   144     1310    0     1309     1     0     1     1     0     8    0
processpl  920     1359    0     1309     7     0     7     7     0     8    0
procpl     624     3240    0     3181     9     3     6     6     0     8    1
sosppl     128       26    0       26     6     5     1     1     0     8    1
sockpl     400     3302    0     3284    10     7     3     4     0     8    0
mcl64k     65536    358    0      358    33    32     1    29     0     8    1
mcl16k     16384      4    0        4     3     2     1     1     0     8    1
mcl12k     12288     43    0       43     7     6     1     1     0     8    1
mcl9k      9216      18    0       18     8     8     0     1     0     8    0
mcl8k      8192      51    0       51     8     7     1     1     0     8    1
mcl4k      4096      87    0       87     5     4     1     1     0     8    1
mcl2k2     2112       8    0        8     6     6     0     1     0     8    0
mcl2k      2048   76452    0    76400    17     9     8    12     0     8    0
mtagpl      96      157    0       68     5     1     4     4     0     8    0
mbufpl     256   137940    0   137552    93    47    46    57     0     8    0
bufpl      280     6880    0     1528   383     0   383   383     0     8    0
anonpl      16   144492    0   128253   120    49    71    82     0   107    3
amapchunkpl 152    7570    0     7411    45    36     9    16     0   158    2
amappl16   192     6473    0     5561    75    28    47    58     0     8    0
amappl15   184      569    0      567     1     0     1     1     0     8    0
amappl14   176       23    0       19     1     0     1     1     0     8    0
amappl13   168       26    0       23     1     0     1     1     0     8    0
amappl12   160       17    0       14     1     0     1     1     0     8    0
amappl11   152      613    0      603     1     0     1     1     0     8    0
amappl10   144      563    0      557     1     0     1     1     0     8    0
amappl9    136      351    0      349     1     0     1     1     0     8    0
amappl8    128      357    0      310     2     0     2     2     0     8    0
amappl7    120      658    0      644     1     0     1     1     0     8    0
amappl6    112      590    0      584     1     0     1     1     0     8    0
amappl5    104      751    0      739     1     0     1     1     0     8    0
amappl4     96      997    0      971     1     0     1     1     0     8    0
amappl3     88      159    0      153     1     0     1     1     0     8    0
amappl2     80     9790    0     9723     2     0     2     2     0     8    0
amappl1     72    33789    0    33375    23    13    10    17     0     8    0
amappl      80     3479    0     3423     2     0     2     2     0    84    0
dma4096    4096       1    0        1     1     1     0     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      64      105    0       11     2     0     2     2     0     8    0
uaddrrnd    24     1346    0     1312     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     1346    0     1312     1     0     1     1     0     8    0
vmmpekpl   168    12073    0    12033     2     0     2     2     0     8    0
vmmpepl    168   161436    0   159397   137    42    95   106     0   357    1
vmsppl     272     1345    0     1312     4     1     3     3     0     8    0
pdppl      4096    2698    0     2644     9     1     8     8     0     8    0
pvpl        32   392532    0   373239   256    81   175   196     0   265   13
pmappl     200     1345    0     1312     2     0     2     2     0     8    0
extentpl    40       53    0       36     1     0     1     1     0     8    0
phpool     112      391    0      121     9     0     9     9     0     8    0
ddb> machine ddbcpu 0
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff824249be) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_put(ffffffff82848690,fffffd8052000000) at pool_do_put+0x36a
pool_put(ffffffff82848690,fffffd8052000000) at pool_put+0x4b sys/kern/subr_pool.c:794
m_free(fffffd8052000000) at m_free+0x119 sys/kern/uipc_mbuf.c:459
ml_purge(ffff80001d780998) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline]
ml_purge(ffff80001d780998) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628
ifq_purge(ffff800000ac4a78) at ifq_purge+0x97 sys/net/ifq.c:462
tun_dev_close(5d01,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460
spec_close(ffff80001d780ac0) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd805db598f0,7,fffffd806c3bf960,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174
vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614
fdrop(fffffd80576e61f0,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd80576e61f0,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263
fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195
exit1(ffff80001d6aa388,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197
postsig(ffff80001d6aa388,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline]
postsig(ffff80001d6aa388,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415
userret(ffff80001d6aa388) at userret+0x159 sys/kern/kern_sig.c:1872
syscall(ffff80001d780f40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
syscall(ffff80001d780f40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe3030, count: -19
ddb> machine ddbcpu 1
No such command
ddb> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff824249be) at panic+0x15c sys/kern/subr_prf.c:207
pool_do_put(ffffffff82848690,fffffd8052000000) at pool_do_put+0x36a
pool_put(ffffffff82848690,fffffd8052000000) at pool_put+0x4b sys/kern/subr_pool.c:794
m_free(fffffd8052000000) at m_free+0x119 sys/kern/uipc_mbuf.c:459
ml_purge(ffff80001d780998) at ml_purge+0x50 m_freem sys/kern/uipc_mbuf.c:538 [inline]
ml_purge(ffff80001d780998) at ml_purge+0x50 sys/kern/uipc_mbuf.c:1628
ifq_purge(ffff800000ac4a78) at ifq_purge+0x97 sys/net/ifq.c:462
tun_dev_close(5d01,7) at tun_dev_close+0xc8 sys/net/if_tun.c:460
spec_close(ffff80001d780ac0) at spec_close+0x311 sys/kern/spec_vnops.c:560
VOP_CLOSE(fffffd805db598f0,7,fffffd806c3bf960,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174
vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline]
vn_closefile(fffffd80576e61f0,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614
fdrop(fffffd80576e61f0,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279
closef(fffffd80576e61f0,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263
fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195
exit1(ffff80001d6aa388,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197
postsig(ffff80001d6aa388,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline]
postsig(ffff80001d6aa388,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415
userret(ffff80001d6aa388) at userret+0x159 sys/kern/kern_sig.c:1872
syscall(ffff80001d780f40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline]
syscall(ffff80001d780f40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffe3030, count: -19

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/06/25 20:56 openbsd 249524653efe c7b4497a .config console log report ci-openbsd-main
2020/05/23 15:56 openbsd 4a4f83401893 9682898d .config console log report ci-openbsd-multicore
* Struck through repros no longer work on HEAD.