syzbot

kernel: protection fault trap, code=0
Stopped at      ktrops+0x4a:    movq    0x8(%rbx),%r14
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
ktrops(ffff8000fffed270,dead4110dead4110,0,c0001000,fffffd806cdae7a8,fffffd807f7d75a0) at ktrops+0x4a ktrcanset sys/kern/kern_ktrace.c:702 [inline]
ktrops(ffff8000fffed270,dead4110dead4110,0,c0001000,fffffd806cdae7a8,fffffd807f7d75a0) at ktrops+0x4a sys/kern/kern_ktrace.c:547
doktrace(fffffd806cdae7a8,4,40001000,0,ffff8000fffed270) at doktrace+0x514 ktrsetchildren sys/kern/kern_ktrace.c:572 [inline]
doktrace(fffffd806cdae7a8,4,40001000,0,ffff8000fffed270) at doktrace+0x514 sys/kern/kern_ktrace.c:494
sys_ktrace(ffff8000fffed270,ffff8000211fa338,ffff8000211fa390) at sys_ktrace+0xd2 sys/kern/kern_ktrace.c:535
syscall(ffff8000211fa400) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000211fa400) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd2210, count: -5
ddb{0}> show registers
rdi               0xffff8000fffed270
rsi               0xdead4110dead4110
rbp               0xffff8000211fa120
rbx               0xdead4110dead4110
rdx                                0
rcx                       0xc0001000
rax                              0x1
r8                0xfffffd806cdae7a8
r9                0xfffffd807f7d75a0
r10               0xfa8af9ee0348cf8a
r11               0xd78c66ec9da5dc0a
r12               0xdead4110dead4110
r13               0xfffffd807f7d75a0
r14               0xffff8000fffed270
r15                       0xc0001000
rip               0xffffffff8159445a    ktrops+0x4a
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff8000211fa0a0
ss                                 0
ktrops+0x4a:    movq    0x8(%rbx),%r14
ddb{0}> show proc
PROC (syz-executor269337736) pid=468221 stat=onproc
    flags process=0 proc=0
    pri=17, usrpri=50, nice=20
    forw=0xffffffffffffffff, list=0xffff8000fffee7e8,0xffff8000fffec2c0
    process=0xffff8000fffe9908 user=0xffff8000211f5000, vmspace=0xfffffd806cd23b90
    estcpu=16, cpticks=1, pctcpu=0.0
    user=0, sys=0, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 98793   39303  86294      0  2           0                syz-executor269337736
*30761  468221  21606      0  7           0                syz-executor269337736
 69627  178344  64718      0  2           0                syz-executor269337736
 72053  306289  64718      0  3           0  biowait       syz-executor269337736
 40070  397303  64718      0  7           0                syz-executor269337736
 32525  116898  64718      0  2           0                syz-executor269337736
 21606  201366  64718      0  3        0x80  nanoslp       syz-executor269337736
 23385  141578  64718      0  2           0                syz-executor269337736
 86294  128500  64718      0  3        0x80  nanoslp       syz-executor269337736
 10109    6245  64718      0  3        0x80  nanoslp       syz-executor269337736
 64718  145319  19548      0  3        0x82  nanoslp       syz-executor269337736
 19548  398245  71290      0  3    0x10008a  sigsusp       ksh
 71290   38613  19998      0  3        0x9a  kqread        sshd
 87733  219203      1      0  3    0x100083  ttyin         getty
 19998  356125      1      0  3        0x88  kqread        sshd
 79909   99196  40531     74  3   0x1100092  bpf           pflogd
 40531   52037      1      0  3        0x80  netio         pflogd
 99836  299715  42219     73  3   0x1100090  kqread        syslogd
 42219  376434      1      0  3    0x100082  netio         syslogd
 91454  279129      1      0  3    0x100080  kqread        resolvd
 92777  289602  95893     77  3    0x100092  kqread        dhcpleased
  5636  179455  95893     77  3    0x100092  kqread        dhcpleased
 95893  315203      1      0  3        0x80  kqread        dhcpleased
 32353  393795      0      0  3     0x14200  bored         smr
 53630  298667      0      0  3     0x14200  pgzero        zerothread
 78865  521530      0      0  3     0x14200  aiodoned      aiodoned
 81976  364477      0      0  3     0x14200  syncer        update
 90644  482689      0      0  3     0x14200  cleaner       cleaner
 67510  107386      0      0  3     0x14200  reaper        reaper
 10524  314754      0      0  3     0x14200  pgdaemon      pagedaemon
 29433  318558      0      0  3     0x14200  bored         viomb
 78480  308021      0      0  3  0x40014200  acpi0         acpi0
 77861  139521      0      0  3  0x40014200                idle1
 39475   42755      0      0  3     0x14200  bored         softnet
 84090  409499      0      0  3     0x14200  bored         softnet
 47501  431541      0      0  3     0x14200  bored         softnet
 75628  164018      0      0  3     0x14200  bored         softnet
 22678  428155      0      0  3     0x14200  bored         systqmp
 65704  400696      0      0  3     0x14200  bored         systq
 11395   42082      0      0  3  0x40014200  bored         softclock
 74027  135989      0      0  3  0x40014200                idle0
     1   11458      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
Process 98793 (syz-executor269337736) thread 0xffff8000fffec2b0 (39303)
exclusive rrwlock inode r = 0 (0xfffffd806cc750a8)
#0  witness_lock+0x44d
#1  rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2  rrw_enter+0x8b sys/kern/kern_rwlock.c:465
#3  VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
#4  ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140
#5  ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347
#6  ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394
#7  ufs_makeinode+0xae sys/ufs/ufs/ufs_vnops.c:1818
#8  ufs_create+0x41 sys/ufs/ufs/ufs_vnops.c:151
#9  VOP_CREATE+0xbc sys/kern/vfs_vops.c:103
#10 vn_open+0x28f sys/kern/vfs_vnops.c:119
#11 doopenat+0x26a sys/kern/vfs_syscalls.c:1131
#12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806cc754e8)
#0  witness_lock+0x44d
#1  rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2  rrw_enter+0x8b sys/kern/kern_rwlock.c:465
#3  VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
#4  vn_lock+0x84 sys/kern/vfs_vnops.c:567
#5  vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413
#6  namei+0x36a sys/kern/vfs_lookup.c:245
#7  vn_open+0x188 sys/kern/vfs_vnops.c:110
#8  doopenat+0x26a sys/kern/vfs_syscalls.c:1131
#9  syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#9  syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#10 Xsyscall+0x128
Process 30761 (syz-executor269337736) thread 0xffff8000fffed270 (468221)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b51c68)
#0  witness_lock+0x44d
#1  __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
#2  mi_switch+0x3d3 sys/kern/sched_bsd.c:416
#3  sleep_finish+0x180 sys/kern/kern_synch.c:420
#4  tsleep+0x12c sys/kern/kern_synch.c:158
#5  getblk+0x13c sys/kern/vfs_bio.c:1031
#6  bread+0x3a bio_doread sys/kern/vfs_bio.c:436 [inline]
#6  bread+0x3a sys/kern/vfs_bio.c:481
#7  ffs_update+0x14b sys/ufs/ffs/ffs_inode.c:91
#8  ufs_inactive+0x25f sys/ufs/ufs/ufs_inode.c:110
#9  VOP_INACTIVE+0xc4 sys/kern/vfs_vops.c:489
#10 vrele+0xd2 sys/kern/vfs_subr.c:825
#11 ktrsettrace+0xb3 sys/kern/kern_ktrace.c:124
#12 ktrops+0x1a4 sys/kern/kern_ktrace.c:550
#13 doktrace+0x514 ktrsetchildren sys/kern/kern_ktrace.c:572 [inline]
#13 doktrace+0x514 sys/kern/kern_ktrace.c:494
#14 sys_ktrace+0xd2 sys/kern/kern_ktrace.c:535
#15 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#15 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#16 Xsyscall+0x128
Process 72053 (syz-executor269337736) thread 0xffff8000fffeed28 (306289)
exclusive rrwlock inode r = 0 (0xfffffd806cd2c098)
#0  witness_lock+0x44d
#1  rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2  rrw_enter+0x8b sys/kern/kern_rwlock.c:465
#3  VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
#4  ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140
#5  ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347
#6  ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394
#7  ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150
#8  VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388
#9  domkdirat+0x121 sys/kern/vfs_syscalls.c:3116
#10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806d50c4e8)
#0  witness_lock+0x44d
#1  rw_enter+0x3e1 sys/kern/kern_rwlock.c:310
#2  rrw_enter+0x8b sys/kern/kern_rwlock.c:465
#3  VOP_LOCK+0x87 sys/kern/vfs_vops.c:518
#4  vn_lock+0x84 sys/kern/vfs_vnops.c:567
#5  vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413
#6  namei+0x36a sys/kern/vfs_lookup.c:245
#7  domkdirat+0x75 sys/kern/vfs_syscalls.c:3101
#8  syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8  syscall+0x489 sys/arch/amd64/amd64/trap.c:585
#9  Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10152   6455K    6456K  78643K     11242        0
            pcb    13      8K       8K  78643K        13        0
         rtable    58      1K       2K  78643K       108        0
         ifaddr    29      8K       8K  78643K        32        0
       counters    40     33K      33K  78643K        40        0
       ioctlops     0      0K       4K  78643K      1479        0
          mount     1      1K       1K  78643K         1        0
            log     0      0K       0K  78643K         5        0
         vnodes  1167     73K      73K  78643K      1180        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       1K  78643K         2        0
         VM map     2      1K       1K  78643K         2        0
            sem     2      0K       0K  78643K         2        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1697    195K     286K  78643K     12548        0
      file desc     1      0K       0K  78643K         1        0
           proc    67     91K      91K  78643K       282        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
       in_multi    11      0K       0K  78643K        11        0
    ether_multi     1      0K       0K  78643K         1        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys    25    122K     122K  78643K        25        0
           exec     0      0K       2K  78643K       432        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    83      5K       5K  78643K      1612        0
       UVM aobj     3      2K       2K  78643K         3        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
            NDP     4      0K       0K  78643K         4        0
           temp    23   4713K    4777K  78643K      2592        0
         kqueue    11     16K      18K  78643K        24        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
plcache    128       22    0        0     1     0     1     1     0     8    0
rtpcb      120       17    0       14     1     0     1     1     0     8    0
rtentry    112       23    0        1     1     0     1     1     0     8    0
unpcb      136       35    0       20     1     0     1     1     0     8    0
syncache   296        5    0        5     2     1     1     1     0     8    1
tcpcb      736        8    0        5     1     0     1     1     0     8    0
arp        120        2    0        0     1     0     1     1     0     8    0
inpcb      312       32    0       26     1     0     1     1     0     8    0
pfosfp      40     1428    0     1005     5     0     5     5     0     8    0
pfosfpen   112     1428    0      714    21     0    21    21     0     8    0
pfstitem    24        8    0        6     2     1     1     1     0     8    0
pfstkey    112        8    0        6     2     1     1     1     0     8    0
pfstate    336        8    0        6     2     1     1     1     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       96    0        0     6     0     6     6     0     8    0
art_table   32       97    0        0     1     0     1     1     0     8    0
art_node    16       22    0        2     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1526    0      100    90     0    90    90     0     8    0
ffsino     272     1526    0      100    96     0    96    96     0     8    0
nchpl      144     1806    0      213    60     0    60    60     0     8    1
uvmvnodes   80     1536    0        0    32     0    32    32     0     8    0
vnodes     224     1536    0        0    91     0    91    91     0     8    0
namei      1024    4882    0     4880     3     1     2     2     0     8    1
percpumem   16       32    0        0     1     0     1     1     0     8    0
kstatmem   264        8    0        0     1     0     1     1     0     8    0
scxspl     216     4581    0     4580    18    17     1     8     0     8    0
plimitpl   152       16    0        9     1     0     1     1     0     8    0
sigapl     424      377    0      333     7     1     6     6     0     8    0
knotepl    120       49    0        0     2     0     2     2     0     8    0
kqueuepl   216       20    0       13     1     0     1     1     0     8    0
pipepl     336       86    0       83     2     1     1     1     0     8    0
fdescpl    496      360    0      335     4     0     4     4     0     8    0
filepl     152     1269    0     1207     3     0     3     3     0     8    0
lockfpl    104        6    0        4     1     0     1     1     0     8    0
lockfspl    48        4    0        2     1     0     1     1     0     8    0
sessionpl  144       18    0        9     1     0     1     1     0     8    0
pgrppl      48       18    0        9     1     0     1     1     0     8    0
ucredpl     96       69    0       57     1     0     1     1     0     8    0
zombiepl   144      335    0      333     2     1     1     1     0     8    0
processpl  1064     377    0      333     4     0     4     4     0     8    0
procpl     672      377    0      333     6     1     5     5     0     8    0
sockpl     480       84    0       60     5     1     4     4     0     8    0
mcl8k      8192       5    0        0     1     0     1     1     0     8    0
mcl4k      4096       5    0        0     1     0     1     1     0     8    0
mcl2k      2048      69    0        0     8     0     8     8     0     8    0
mtagpl      96        2    0        0     1     0     1     1     0     8    0
mbufpl     256      114    0        0     7     0     7     7     0     8    0
bufpl      288     2117    0       96   145     0   145   145     0     8    0
anonpl      24    39147    0    36518    19     3    16    16     0   186    0
amapchunkpl 152    2876    0     2739     8     2     6     6     0   158    0
amappl16   200      151    0      137     1     0     1     1     0     8    0
amappl13   176       34    0       33     2     1     1     1     0     8    0
amappl12   168        3    0        3     2     1     1     1     0     8    1
amappl11   160       66    0       49     1     0     1     1     0     8    0
amappl10   152        3    0        1     1     0     1     1     0     8    0
amappl9    144      487    0      485     1     0     1     1     0     8    0
amappl8    136      366    0      365     2     1     1     1     0     8    0
amappl7    128       52    0       49     1     0     1     1     0     8    0
amappl6    120      104    0       94     1     0     1     1     0     8    0
amappl5    112      107    0       86     1     0     1     1     0     8    0
amappl4    104      633    0      611     1     0     1     1     0     8    0
amappl3     96      443    0      412     1     0     1     1     0     8    0
amappl2     88      455    0      417     1     0     1     1     0     8    0
amappl1     80     9656    0     9182    12     2    10    10     0     8    0
amappl      88     1323    0     1266     3     1     2     2     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        2    0        0     1     0     1     1     0     8    0
uaddrrnd    24      360    0      335     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      360    0      335     1     0     1     1     0     8    0
vmmpekpl   168     6336    0     6323     1     0     1     1     0     8    0
vmmpepl    168    28544    0    27375    58     4    54    54     0   357    3
vmsppl     368      359    0      335     3     0     3     3     0     8    0
rwobjpl     56     9887    0     7713    32     1    31    31     0     8    0
pdppl      4096     727    0      670    83    20    63    63     0     8    6
pvpl        32   133430    0   128534    46     6    40    40     0   265    0
pmappl     248      359    0      335     2     0     2     2     0     8    0
extentpl    40       58    0       38     1     0     1     1     0     8    0
phpool     112      458    0       26    13     0    13    13     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
ktrops(ffff8000fffed270,dead4110dead4110,0,c0001000,fffffd806cdae7a8,fffffd807f7d75a0) at ktrops+0x4a ktrcanset sys/kern/kern_ktrace.c:702 [inline]
ktrops(ffff8000fffed270,dead4110dead4110,0,c0001000,fffffd806cdae7a8,fffffd807f7d75a0) at ktrops+0x4a sys/kern/kern_ktrace.c:547
doktrace(fffffd806cdae7a8,4,40001000,0,ffff8000fffed270) at doktrace+0x514 ktrsetchildren sys/kern/kern_ktrace.c:572 [inline]
doktrace(fffffd806cdae7a8,4,40001000,0,ffff8000fffed270) at doktrace+0x514 sys/kern/kern_ktrace.c:494
sys_ktrace(ffff8000fffed270,ffff8000211fa338,ffff8000211fa390) at sys_ktrace+0xd2 sys/kern/kern_ktrace.c:535
syscall(ffff8000211fa400) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff8000211fa400) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd2210, count: -5
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x1a:        addq    $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff800020cd8ff0) 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
__mp_lock(ffffffff82b51a60) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline]
__mp_lock(ffffffff82b51a60) at __mp_lock+0x122 sys/kern/kern_lock.c:147
syscall(ffff8000211e8e50) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline]
syscall(ffff8000211e8e50) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd2210, count: -6