syzbot


panic:WA RpNoIolNG_:ca SchPeL _NiOTt eLmO_WmEaRgiEcD _OcNh eScYkS:C AmLbLu fp2 l3 c1p7u6 7f1r2e2e 9 lEiXsIt T mo0d ai

Status: closed as dup on 2020/07/15 19:21
Reported-by: syzbot+827377205b208e05c25e@syzkaller.appspotmail.com
First crash: 1352d, last: 1352d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
pool: cpu free list modified: mbufpl syz 15863 1331d 1618d

Sample crash report:
panic:WA RpNoIolNG_:ca SchPeL _NiOTt eLmO_WmEaRgiEcD _OcNh eScYkS:C AmLbLu fp2 l3 c1p7u6 7f1r2e2e 9 lEiXsIt T mo0d ai
fiStopped at      savectx+0xb1:   movl    $0,%gs:0x530
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
* 51926  31232      0         0x2          0    0  syz-executor.1
  68307  83495      0        0x12          0    1  sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdfcd0, count: 14
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
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806d362900+16 0x0!=0x2c6b99c32c4c0757
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdfcd0, count: -1
ddb{0}> show registers
rdi                                0
rsi                                0
rbp               0xffff800020efadb0
rbx                                0
rdx                             0x8b
rcx                              0x2
rax                             0x39
r8                0xffffffff81bc9d4f    kprintf+0x16f
r9                               0x1
r10                              0x2
r11                0x1b6216ab73a0d71
r12                                0
r13                                0
r14               0xffff800020ddd5f8
r15                                0
rip               0xffffffff819b33f1    savectx+0xb1
cs                               0x8
rflags                          0x46
rsp               0xffff800020efad30
ss                              0x10
savectx+0xb1:   movl    $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=51926 stat=onproc
    flags process=2<EXEC,8ORPHAN> proc=0
    pri=60, usrpri=60, nice=20
    forw=0xffffffffffffffff, list=0xffff800020ddc278,0xffff800020ddd128
    process=0xffff800020df0010 user=0xffff800020ef5000, vmspace=0xfffffd807f000cf0
    estcpu=36, cpticks=1, pctcpu=0.18
    user=0, sys=1, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 33003  365612  31232      0  2           0                syz-executor.1
 14933   98287  55294      0  3         0x2  biowait       syz-executor.0
*31232   51926  55294      0  7         0x2                syz-executor.1
 55294  210517  54620      0  3        0x82  thrsleep      syz-fuzzer
 55294  101510  54620      0  3   0x4000082  nanosleep     syz-fuzzer
 55294  183753  54620      0  3   0x4000082  thrsleep      syz-fuzzer
 55294  309520  54620      0  3   0x4000082  kqread        syz-fuzzer
 55294  195361  54620      0  3   0x4000082  thrsleep      syz-fuzzer
 55294  448572  54620      0  3   0x4000082  thrsleep      syz-fuzzer
 55294  385572  54620      0  3   0x4000082  thrsleep      syz-fuzzer
 55294  440980  54620      0  3   0x4000082  thrsleep      syz-fuzzer
 55294  475360  54620      0  3   0x4000082  nanosleep     syz-fuzzer
 55294  387092  54620      0  3   0x4000082  thrsleep      syz-fuzzer
 54620  323724  83495      0  3    0x10008a  pause         ksh
 83495   68307  19407      0  7        0x12                sshd
 73670  120967      1      0  3    0x100083  ttyin         getty
 19407   92585      1      0  3        0x80  select        sshd
 55692  359294   7110     74  3    0x100092  bpf           pflogd
  7110  370358      1      0  3        0x80  netio         pflogd
 88006  111862  37528     73  3    0x100090  kqread        syslogd
 37528  361666      1      0  3    0x100082  netio         syslogd
 74797  523304      1     77  3    0x100090  poll          dhclient
 53544  191163      1      0  3        0x80  poll          dhclient
 42909   94140      0      0  3     0x14200  bored         smr
 54788  319627      0      0  2     0x14200                zerothread
 24614  514742      0      0  3     0x14200  aiodoned      aiodoned
 45271  277923      0      0  3     0x14200  syncer        update
 69233  101431      0      0  3     0x14200  cleaner       cleaner
 39719   97305      0      0  3     0x14200  reaper        reaper
 98081  301057      0      0  3     0x14200  pgdaemon      pagedaemon
 75227  516223      0      0  3     0x14200  bored         crynlk
 65804  302231      0      0  3     0x14200  bored         crypto
 44741   95549      0      0  3  0x40014200  acpi0         acpi0
 30309  474144      0      0  3  0x40014200                idle1
 17584  247329      0      0  3     0x14200  bored         softnet
 11960  233929      0      0  3     0x14200  bored         systqmp
  5299    7222      0      0  3     0x14200  bored         systq
 88314  217944      0      0  3  0x40014200  bored         softclock
 22853  282771      0      0  3  0x40014200                idle0
     1  187506      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
CPU 0:
exclusive sched_lock &sched_lock r = 1 (0xffffffff8290aa80)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  wakeup_n+0x37 sys/kern/kern_synch.c:589
#2  uvm_pmr_getpages+0xd80 sys/uvm/uvm_pmemrange.c:1172
#3  uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#4  uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#5  uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#6  fork1+0x271 sys/kern/kern_fork.c:365
#7  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#7  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#8  Xsyscall+0x128
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8292ead8)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  mtx_enter_try+0x102
#2  mtx_enter+0x4b sys/kern/kern_lock.c:266
#3  uvm_pmr_getpages+0xd2c sys/uvm/uvm_pmemrange.c:1170
#4  uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#5  uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#6  uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#7  fork1+0x271 sys/kern/kern_fork.c:365
#8  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9  Xsyscall+0x128
Process 14933 (syz-executor.0) thread 0xffff800020ddd118 (98287)
exclusive rrwlock inode r = 0 (0xfffffd8064955e70)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2  rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3  ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140
#4  ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358
#5  ffs_inode_alloc+0x1e2 sys/ufs/ffs/ffs_alloc.c:394
#6  ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162
#7  VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450
#8  domkdirat+0x121 sys/kern/vfs_syscalls.c:3051
#9  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#10 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b1fb4d8)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2  rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3  VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4  vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5  vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6  namei+0x63c sys/kern/vfs_lookup.c:249
#7  domkdirat+0x75 sys/kern/vfs_syscalls.c:3036
#8  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9  Xsyscall+0x128
Process 31232 (syz-executor.1) thread 0xffff800020ddd5f8 (51926)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8292e770)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline]
#1  syscall+0x400 sys/arch/amd64/amd64/trap.c:570
#2  Xsyscall+0x128
exclusive sched_lock &sched_lock r = 1 (0xffffffff8290aa80)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  wakeup_n+0x37 sys/kern/kern_synch.c:589
#2  uvm_pmr_getpages+0xd80 sys/uvm/uvm_pmemrange.c:1172
#3  uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#4  uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#5  uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#6  fork1+0x271 sys/kern/kern_fork.c:365
#7  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#7  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#8  Xsyscall+0x128
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8292ead8)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  mtx_enter_try+0x102
#2  mtx_enter+0x4b sys/kern/kern_lock.c:266
#3  uvm_pmr_getpages+0xd2c sys/uvm/uvm_pmemrange.c:1170
#4  uvm_pglistalloc+0x362 sys/uvm/uvm_page.c:790
#5  uvm_km_kmemalloc_pla+0x238 sys/uvm/uvm_km.c:367
#6  uvm_uarea_alloc+0x51 sys/uvm/uvm_glue.c:274
#7  fork1+0x271 sys/kern/kern_fork.c:365
#8  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9  Xsyscall+0x128
Process 83495 (sshd) thread 0xffff800020e40ae0 (68307)
exclusive rwlock netlock r = 0 (0xffffffff82709b58)
#0  witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0  witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1  solock+0x5a sys/kern/uipc_socket2.c:282
#2  sosend+0x559 sys/kern/uipc_socket.c:543
#3  dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4  sys_write+0x83 sys/kern/sys_generic.c:285
#5  syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5  syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6  Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf  9481   6402K    6854K  78643K     10735        0
            pcb    13      8K       8K  78643K        41        0
         rtable   113     12K      12K  78643K       244        0
         ifaddr    50     11K      12K  78643K        68        0
       counters    43     33K      34K  78643K        47        0
       ioctlops     0      0K       4K  78643K      1511        0
            iov     0      0K      16K  78643K        11        0
          mount     1      1K       1K  78643K         1        0
         vnodes  1222     77K      77K  78643K      1268        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       5K  78643K         5        0
         VM map     2      1K       1K  78643K         2        0
            sem    12      0K       0K  78643K        18        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1824    197K     290K  78643K     13058        0
      file desc     5     13K      25K  78643K       126        0
           proc    61     63K      95K  78643K       445        0
        subproc    32      2K       2K  78643K        34        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
    ip_moptions     0      0K       0K  78643K         6        0
       in_multi    33      2K       2K  78643K        36        0
    ether_multi     1      0K       0K  78643K         2        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys    37    175K     175K  78643K        37        0
           exec     0      0K       1K  78643K       211        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   113     38K      38K  78643K      1319        0
       UVM aobj     9      2K       2K  78643K         9        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
    ip6_options     0      0K       0K  78643K        24        0
            NDP     7      0K       0K  78643K        13        0
           temp    77   3856K    3921K  78643K      2476        0
         kqueue     3      4K       6K  78643K        12        0
      SYN cache     2     16K      16K  78643K         2        0
ddb{0}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp         64        6    0        0     1     0     1     1     0     8    0
plcache    128       20    0        0     1     0     1     1     0     8    0
rtpcb       80       29    0       27     1     0     1     1     0     8    0
rtentry    112       46    0        1     2     0     2     2     0     8    0
unpcb      120      110    0      100     1     0     1     1     0     8    0
syncache   264        4    0        4     1     1     0     1     0     8    0
tcpqe       32       96    0       96     2     1     1     1     0     8    1
tcpcb      544       46    0       41     1     0     1     1     0     8    0
inpcb      296      232    0      224     2     0     2     2     0     8    1
nd6         48        7    0        0     1     0     1     1     0     8    0
pfstscr     40        4    0        2     1     0     1     1     0     8    0
pffrag     232        1    0        1     1     0     1     1     0   482    1
pffrnode    88        1    0        1     1     0     1     1     0     8    1
pffrent     40       45    0       45     1     0     1     1     0     8    1
pfosfp      40      846    0      423     5     0     5     5     0     8    0
pfosfpen   112     1428    0      714    21     0    21    21     0     8    0
pfstitem    24       23    0        0     1     0     1     1     0     8    0
pfstkey    112       25    0        2     1     0     1     1     0     8    0
pfstate    328       23    0        1     2     0     2     2     0     8    0
pfrule     1360      21    0       16     2     1     1     2     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      195    0        0    13     0    13    13     0     8    0
art_table   32      196    0        0     2     0     2     2     0     8    0
art_node    16       45    0        4     1     0     1     1     0     8    0
sysvmsgpl   40       12    0        6     1     0     1     1     0     8    0
semapl     112       16    0        6     1     0     1     1     0     8    0
shmpl      112        6    0        0     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1555    0      146    89     0    89    89     0     8    0
ffsino     272     1555    0      146    95     0    95    95     0     8    0
nchpl      144     1890    0      282    60     0    60    60     0     8    0
uvmvnodes   72     1632    0        0    30     0    30    30     0     8    0
vnodes     208     1632    0        0    86     0    86    86     0     8    0
namei      1024    5074    0     5073     1     0     1     1     0     8    0
percpumem   16       34    0        2     1     0     1     1     0     8    0
vcpupl     1984       2    0        0     1     0     1     1     0     8    0
vmpool     560        2    0        0     1     0     1     1     0     8    0
scxspl     192     5832    0     5831     6     1     5     5     0     8    4
plimitpl   152       23    0       15     1     0     1     1     0     8    0
sigapl     424      341    0      310     4     0     4     4     0     8    0
futexpl     56     1596    0     1596     1     0     1     1     0     8    1
knotepl    112       69    0       50     1     0     1     1     0     8    0
kqueuepl   144       17    0       15     1     0     1     1     0     8    0
pipepl     304       87    0       77     2     0     2     2     0     8    1
fdescpl    496      326    0      310     3     0     3     3     0     8    0
filepl     152     1829    0     1729     5     0     5     5     0     8    1
lockfpl    104       61    0       60     1     0     1     1     0     8    0
lockfspl    48       22    0       21     1     0     1     1     0     8    0
sessionpl  112       18    0        7     1     0     1     1     0     8    0
pgrppl      48       18    0        7     1     0     1     1     0     8    0
ucredpl     96      140    0      131     1     0     1     1     0     8    0
zombiepl   144      310    0      310     1     0     1     1     0     8    1
processpl  992      341    0      310     5     0     5     5     0     8    1
procpl     624      554    0      514     4     0     4     4     0     8    0
sockpl     400      371    0      351     4     0     4     4     0     8    1
mcl64k     65536      6    0        0     1     0     1     1     0     8    0
mcl16k     16384      1    0        0     1     0     1     1     0     8    0
mcl12k     12288      2    0        0     1     0     1     1     0     8    0
mcl9k      9216       1    0        0     1     0     1     1     0     8    0
mcl8k      8192       1    0        0     1     0     1     1     0     8    0
mcl4k      4096       6    0        0     1     0     1     1     0     8    0
mcl2k2     2112       1    0        0     1     0     1     1     0     8    0
mcl2k      2048     185    0        0    23     0    23    23     0     8    0
mtagpl      96       16    0        0     1     0     1     1     0     8    0
mbufpl     256      271    0        0    16     0    16    16     0     8    0
bufpl      280     3626    0      135   250     0   250   250     0     8    0
anonpl      16    45603    0    29065    69     1    68    68     0   124    0
amapchunkpl 152    1594    0     1451     9     0     9     9     0   158    2
amappl16   192     1429    0      536    46     0    46    46     0     8    1
amappl15   184        1    0        1     1     1     0     1     0     8    0
amappl14   176       22    0       19     1     0     1     1     0     8    0
amappl13   168      121    0      116     1     0     1     1     0     8    0
amappl12   160        6    0        6     2     2     0     1     0     8    0
amappl11   152       56    0       40     1     0     1     1     0     8    0
amappl10   144       35    0       27     1     0     1     1     0     8    0
amappl9    136      299    0      297     1     0     1     1     0     8    0
amappl8    128      352    0      323     2     0     2     2     0     8    0
amappl7    120      117    0      106     1     0     1     1     0     8    0
amappl6    112       30    0       23     2     1     1     1     0     8    0
amappl5    104      396    0      382     1     0     1     1     0     8    0
amappl4     96      580    0      550     1     0     1     1     0     8    0
amappl3     88      104    0       99     1     0     1     1     0     8    0
amappl2     80     1649    0     1585     2     0     2     2     0     8    0
amappl1     72    17157    0    16729    23    12    11    18     0     8    1
amappl      80      808    0      765     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        8    0        0     1     0     1     1     0     8    0
uaddrrnd    24      328    0      310     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      328    0      310     1     0     1     1     0     8    0
vmmpekpl   168     6476    0     6443     2     0     2     2     0     8    0
vmmpepl    168    47521    0    45493   121     8   113   113     0   357   21
vmsppl     368      327    0      310     2     0     2     2     0     8    0
pdppl      4096     663    0      622     6     0     6     6     0     8    0
pvpl        32   155050    0   135458   167     0   167   167     0   265    5
pmappl     232      327    0      310     2     0     2     2     0     8    0
extentpl    40       53    0       36     1     0     1     1     0     8    0
phpool     112      266    0        3     8     0     8     8     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffdfcd0, count: -1
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x1a:        addq    $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fee01) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fee01) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828c79e0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000ada320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eadee18,9,fffffd806d362400,0,0,ffff800020e40ae0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e04350, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fee01) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fee01) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff828c79e0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff828c79e0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000ada320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eadee18,9,fffffd806d362400,0,0,ffff800020e40ae0) at tcp_usrreq+0xa55
sosend(fffffd806eadee18,0,ffff800020e04418,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e40ae0,4,ffff800020e04418,0,ffff800020e04500) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e40ae0,ffff800020e044b0,ffff800020e04500) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e04580) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e04580) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffc7a60, count: -19

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/07/15 10:48 openbsd b536459a84b7 ada108d0 .config console log report ci-openbsd-multicore
* Struck through repros no longer work on HEAD.