syzbot

kernel: protection fault trap, code=0
Stopped at      bpfdetach+0x70: movq    0(%r15),%r12
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
bpfdetach(ffff800001603800) at bpfdetach+0x70 sys/net/bpf.c:1770
if_detach(ffff800001603800) at if_detach+0x12b sys/net/if.c:1289
tun_clone_destroy(ffff800001603800) at tun_clone_destroy+0x2ce sys/net/if_tun.c:347
if_clone_destroy(ffff80003c42d430) at if_clone_destroy+0x205 sys/net/if.c:1479
ifioctl(ffff800010fdd4a8,80206979,ffff80003c42d430,ffff80003a7f2fb8) at ifioctl+0x59d sys/net/if.c:2160
sys_ioctl(ffff80003a7f2fb8,ffff80003c42d610,ffff80003c42d560) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c42d610) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c42d610) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x60b2df5d6c0, count: -8
ddb{0}> show registers
rdi                                0
rsi                                0
rbp               0xffff80003c42d250
rbx                       0x80206979    __kernel_virt_to_phys+0x206979
rdx                                0
rcx               0xffff80003a7f2fb8
rax               0xffffffff8388bff0    cpu_info_full_primary+0x1ff0
r8                             0x100
r9                                 0
r10               0xe8a26e3ec00b63dc
r11               0x434c9bc8df03ac7b
r12               0xdead0002dead4110
r13               0xffff800001603e48
r14               0xffff800001603800
r15               0xdead0002dead4110
rip               0xffffffff82da2e20    bpfdetach+0x70
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff80003c42d220
ss                              0x10
bpfdetach+0x70: movq    0(%r15),%r12
ddb{0}> show proc
PROC (syz-executor) tid=184680 pid=30088 tcnt=4 stat=onproc
    flags process=0 proc=4000000<THREAD>
    runpri=32, usrpri=50, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff80003a7f3cb0,0xffff80003a7f34f8
    process=0xffff80003a7f79e0 user=0xffff80003c428000, vmspace=0xfffffd80741f09a8
    estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
  8608  243279  17063      0  2           0                syz-executor
 18737  338316  71276      0  2           0                syz-executor
 30088  118673  19086      0  3        0x80  nanoslp       syz-executor
*30088  184680  19086      0  7   0x4000000                syz-executor
 30088  178546  19086      0  3   0x4000080  fsleep        syz-executor
 30088  157918  19086      0  3   0x4000080  fsleep        syz-executor
 14846  462028  34673      0  2       0xc80                syz-executor
 14846  246623  34673      0  3   0x4000080  ttyout        syz-executor
 14846  389683  34673      0  3   0x4000080  fsleep        syz-executor
 72312  345216  77933      0  2           0                syz-executor
 72312  110001  77933      0  3   0x4000080  kqsel         syz-executor
 72312  468095  77933      0  2   0x4000000                syz-executor
 32674  314268  98543      0  3      0x3000  suspend       syz-executor
 32674  214561  98543      0  7   0x4081000                syz-executor
 19331   63293  35758      0  3           0  vmmaplk       syz-executor
 19331  156218  35758      0  2   0x4000000                syz-executor
 19331  524079  35758      0  3   0x4000000  vmmaplk       syz-executor
 98543  400140  19131      0  2       0xc82                syz-executor
 77933   77147  19131      0  2       0xc82                syz-executor
 81070    7413  19131      0  2         0x2                syz-executor
 71276  496030  19131      0  3        0x82  nanoslp       syz-executor
 19086  185505  19131      0  2       0xc82                syz-executor
 35758  470203  19131      0  2       0xc82                syz-executor
 34673  368119  19131      0  3        0x82  nanoslp       syz-executor
 17063  295778  19131      0  3        0x82  nanoslp       syz-executor
 19131  483029  96687      0  3        0x82  kqread        syz-executor
 96687  277632  69072      0  3    0x10008a  sigsusp       ksh
 69072   68141  99763      0  3        0x98  kqread        sshd-session
 99763   46096   2801      0  3        0x92  kqread        sshd-session
 63218  473670      1      0  3    0x100083  ttyin         getty
  2801   67665      1      0  3        0x88  kqread        sshd
 75076  510799  62775     74  3   0x1100092  bpf           pflogd
 62775  280421      1      0  3        0x80  sbwait        pflogd
 56990   90038  71147     73  3   0x1100090  kqread        syslogd
 71147    7068      1      0  3    0x100082  sbwait        syslogd
 97511  198567      1      0  3    0x100080  kqread        resolvd
 92164  326804  62353     77  2    0x100092                dhcpleased
 24280  416619  62353     77  3    0x100092  kqread        dhcpleased
 62353  413068      1      0  3        0x80  kqread        dhcpleased
 42458  169075      0      0  3     0x14200  bored         smr
 75672   97901      0      0  2     0x14200                zerothread
 13907  209775      0      0  3     0x14200  aiodoned      aiodoned
 43097  219723      0      0  3     0x14200  syncer        update
 20600  408534      0      0  3     0x14200  cleaner       cleaner
 34026  392266      0      0  3     0x14200  reaper        reaper
 80413  305190      0      0  3     0x14200  pgdaemon      pagedaemon
 36149  191737      0      0  3     0x14200  bored         viomb
 97001  333385      0      0  3  0x40014200  acpi0         acpi0
 51137  229599      0      0  3  0x40014200                idle1
 77415  151015      0      0  3     0x14200  bored         softnet1
 57848  177865      0      0  3     0x14200  tqbarend      softnet0
 11680  179904      0      0  3     0x14200  bored         systqmp
 30706  202294      0      0  3     0x14200  bored         systq
 78859  168263      0      0  2     0x14200                softclockmp
 15922  426454      0      0  3  0x40014200  tmoslp        softclock
 74811  185555      0      0  3  0x40014200                idle0
     1  313893      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
Process 30088 (syz-executor) thread 0xffff80003a7f2fb8 (184680)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839d8540)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2  sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#3  rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298
#4  bpf_detachd+0x1c2 sys/net/bpf.c:345
#5  bpfclose+0x101 sys/net/bpf.c:417
#6  spec_close+0x466 sys/kern/spec_vnops.c:-1
#7  VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
#8  vclean+0x20f sys/kern/vfs_subr.c:1083
#9  vgonel+0xb0 sys/kern/vfs_subr.c:1185
#10 vop_generic_revoke+0x3ea sys/kern/vfs_default.c:124
#11 VOP_REVOKE+0x65 sys/kern/vfs_vops.c:291
#12 vdevgone+0x17b sys/kern/vfs_subr.c:-1
#13 bpfsdetach+0x155 sys/net/bpf.c:1794
#14 bpfdetach+0xa6 sys/net/bpf.c:-1
#15 if_detach+0x12b sys/net/if.c:1289
#16 tun_clone_destroy+0x2ce sys/net/if_tun.c:347
#17 if_clone_destroy+0x205 sys/net/if.c:1479
#18 ifioctl+0x59d sys/net/if.c:2160
exclusive rwlock clonelk r = 0 (0xffffffff8389e5a8)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2  if_clone_destroy+0x93 sys/net/if.c:-1
#3  ifioctl+0x59d sys/net/if.c:2160
#4  sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#5  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#6  Xsyscall+0x128
Process 19331 (syz-executor) thread 0xffff800039fd9778 (156218)
shared rwlock vmmaplk r = 0 (0xfffffd806c8d9118)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2  uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:173
#3  physio+0x257 sys/kern/kern_physio.c:139
#4  spec_write+0x11f sys/kern/spec_vnops.c:302
#5  VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
#6  vn_write+0x1d3 sys/kern/vfs_vnops.c:408
#7  dofilewritev+0x2bd sys/kern/sys_generic.c:384
#8  sys_write+0xa2 sys/kern/sys_generic.c:300
#9  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
#10 Xsyscall+0x128
Process 57848 (softnet0) thread 0xffff8000ffffe7c8 (177865)
shared rwlock softnet0 r = 0 (0xffff80000002c078)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  taskq_thread+0x12a sys/kern/kern_task.c:442
#2  proc_trampoline+0x10
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11058  12151K   12279K 166960K     12173        0
            pcb    18     12K      12K 166960K        25        0
         rtable   215      6K       6K 166960K       351        0
             pf    32     17K      18K 166960K        49        0
         ifaddr    39      6K       7K 166960K        47        0
        ifgroup    51      2K       2K 166960K        59        0
         sysctl     1      1K       9K 166960K         5        0
       counters    68     36K      37K 166960K        74        0
       ioctlops     0      0K       4K 166960K      1484        0
            iov     0      0K      12K 166960K         1        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1293     81K      81K 166960K      1383        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       5K 166960K         3        0
         VM map     2      1K       1K 166960K         2        0
            sem     2      0K       0K 166960K         2        0
        dirhash    12      2K       2K 166960K        12        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    17     61K      89K 166960K       161        0
           proc    71    115K     164K 166960K       560        0
        subproc    72      4K       4K 166960K        72        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K         6        0
       in_multi    88      6K       7K 166960K       101        0
    ether_multi     1      0K       0K 166960K         2        0
            mrt     0      0K       0K 166960K         5        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys    49    228K     228K 166960K        49        0
           exec     0      0K       1K 166960K       379        0
   fusefs mount     1     32K      32K 166960K         1        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   239    167K     175K 166960K      3359        0
       UVM aobj     4      2K       2K 166960K         4        0
     pinsyscall    42     84K     105K 166960K      1298        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
            NDP    11      0K       2K 166960K        30        0
           temp    37   9074K    9140K 166960K      4205        0
         kqueue    14     22K      22K 166960K        25        0
      SYN cache     2     16K      16K 166960K         2        0
ddb{0}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache    128       26    0        0     1     0     1     1     0     8    0
rtpcb      120       37    0       34     1     0     1     1     0     8    0
rtentry    176      111    0       12     5     0     5     5     0     8    0
unpcb      144       46    0       29     1     0     1     1     0     8    0
syncache   336        6    0        6     1     0     1     1     0     8    1
tcpcb      736       20    0        8     2     0     2     2     0     8    0
arp        136       18    0        2     1     0     1     1     0     8    0
inpcb      328       93    0       75     2     0     2     2     0     8    0
nd6        152       24    0        3     1     0     1     1     0     8    0
kcovpl      48        8    0        0     1     0     1     1     0     8    0
ppxss      1192       2    0        1     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       18    0        0     1     0     1     1     0     8    0
pfstkey    128       18    0        0     1     0     1     1     0     8    0
pfstate    448       18    0        0     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      452    0       44    29     0    29    29     0     8    1
art_table   40      453    0       44     5     0     5     5     0     8    0
art_node    32      111    0       21     1     0     1     1     0     8    0
shmpl      112        1    0        0     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1618    0      149    92     0    92    92     0     8    0
ffsino     296     1618    0      149   114     0   114   114     0     8    0
nchpl      144     1849    0      140    64     0    64    64     0     8    0
vnodes     216     1715    0        0    96     0    96    96     0     8    0
namei      1024    5561    0     5561     2     0     2     2     0     8    2
percpumem   16       52    0        3     1     0     1     1     0     8    0
kstatmem   264       30    0        5     2     0     2     2     0     8    0
scxspl     216     6531    0     6531     4     2     2     3     1     8    2
plimitpl   152       30    0       12     1     0     1     1     0     8    0
sigapl     424      473    0      426     7     0     7     7     0     8    1
knotepl    120      300    0        0    10     0    10    10     0     8    0
kqueuepl   224       28    0       16     1     0     1     1     0     8    0
pipepl     344      122    0       95     3     0     3     3     0     8    0
fdescpl    528      457    0      426     3     0     3     3     0     8    0
filepl     160     1659    0     1435    10     0    10    10     0     8    0
lockfpl    104       25    0       23     1     0     1     1     0     8    0
lockfspl    48       12    0       10     1     0     1     1     0     8    0
sessionpl  144       26    0       16     1     0     1     1     0     8    0
pgrppl      48       34    0       16     1     0     1     1     0     8    0
ucredpl    104       99    0       86     1     0     1     1     0     8    0
zombiepl   144      427    0      426     1     0     1     1     0     8    0
processpl  1232     473    0      426     5     0     5     5     0     8    0
procpl     664      527    0      470     6     0     6     6     0     8    0
sockpl     752      176    0      138     5     0     5     5     0     8    1
mcl64k     65536      1    0        0     1     0     1     1     0     8    0
mcl16k     16384      2    0        0     1     0     1     1     0     8    0
mcl8k      8192       2    0        0     1     0     1     1     0     8    0
mcl4k      4096     132    0        0    17     0    17    17     0     8    0
mcl2k      2048      18    0        0     3     0     3     3     0     8    0
mtagpl      96        3    0        0     1     0     1     1     0     8    0
mbufpl     256      138    0        0     9     0     9     9     0     8    0
bufpl      280     2313    0      105   158     0   158   158     0     8    0
anonpl      32     9500    0        0    77     0    77    77     0   246    0
amapchunkpl 152    9396    0     8900    28     0    28    28     0   158    5
amappl16   200     1982    0     1722    14     0    14    14     0     8    0
amappl15   192        5    0        5     1     1     0     1     0     8    0
amappl14   184      428    0      427     1     0     1     1     0     8    0
amappl13   176      117    0      105     1     0     1     1     0     8    0
amappl12   168      700    0      671     2     0     2     2     0     8    0
amappl11   160        9    0        9     1     1     0     1     0     8    0
amappl10   152       64    0       50     1     0     1     1     0     8    0
amappl9    144      283    0      283     1     1     0     1     0     8    0
amappl8    136      105    0      103     1     0     1     1     0     8    0
amappl7    128      216    0      203     1     0     1     1     0     8    0
amappl6    120      163    0      162     1     0     1     1     0     8    0
amappl5    112       94    0       84     1     0     1     1     0     8    0
amappl4    104      285    0      267     1     0     1     1     0     8    0
amappl3     96     1586    0     1477     4     0     4     4     0     8    1
amappl2     88      515    0      452     2     0     2     2     0     8    0
amappl1     80     9308    0     8710    14     0    14    14     0     8    0
amappl      88     2651    0     2484     5     0     5     5     0    92    0
uvmvnodes   80       98    0        0     2     0     2     2     0     8    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        3    0        0     1     0     1     1     0     8    0
uaddrrnd    24      457    0      426     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      457    0      426     1     0     1     1     0     8    0
vmmpekpl   168     5514    0     5480     2     0     2     2     0     8    0
vmmpepl    168    37825    0    35690    97     0    97    97     0   357    0
vmsppl     488      456    0      426     5     0     5     5     0     8    0
rwobjpl     80    13949    0    12690    27     0    27    27     0     8    0
pdppl      4096     921    0      852    97    22    75    85     0     8    6
pvpl        32    16806    0        0   136     0   136   136     0   265    0
pmappl     256      456    0      426     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      269    0       25     8     0     8     8     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
bpfdetach(ffff800001603800) at bpfdetach+0x70 sys/net/bpf.c:1770
if_detach(ffff800001603800) at if_detach+0x12b sys/net/if.c:1289
tun_clone_destroy(ffff800001603800) at tun_clone_destroy+0x2ce sys/net/if_tun.c:347
if_clone_destroy(ffff80003c42d430) at if_clone_destroy+0x205 sys/net/if.c:1479
ifioctl(ffff800010fdd4a8,80206979,ffff80003c42d430,ffff80003a7f2fb8) at ifioctl+0x59d sys/net/if.c:2160
sys_ioctl(ffff80003a7f2fb8,ffff80003c42d610,ffff80003c42d560) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c42d610) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c42d610) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x60b2df5d6c0, count: -8
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff8000299bdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153
__mp_lock(ffffffff839d7d40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff839d7d40) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173
__mp_acquire_count(ffffffff839d7d40,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369
msleep_nsec(ffff80000002c070,ffff80000002c018,20,ffffffff834db03c,ffffffffffffffff) at msleep_nsec+0x132 sys/kern/kern_synch.c:219
taskq_do_barrier(ffff80000002c000) at taskq_do_barrier+0x15f sys/kern/kern_task.c:304
ifq_destroy(ffff8000015ffaf8) at ifq_destroy+0x106 sys/net/ifq.c:352
if_detach(ffff8000015ff800) at if_detach+0x636 sys/net/if.c:-1
pppacclose(637f,81,2000,ffff800039fd87e8) at pppacclose+0x118 sys/net/if_pppx.c:1329
spec_close(ffff80002ebab3d0) at spec_close+0x417 sys/kern/spec_vnops.c:-1
VOP_CLOSE(fffffd806a8b9888,81,fffffd80097fd750,ffff800039fd87e8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156
vn_closefile(fffffd800ea37688,ffff800039fd87e8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline]
vn_closefile(fffffd800ea37688,ffff800039fd87e8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615
fdrop(fffffd800ea37688,ffff800039fd87e8) at fdrop+0x121 sys/kern/kern_descrip.c:1281
closef(fffffd800ea37688,ffff800039fd87e8) at closef+0x192 sys/kern/kern_descrip.c:1265
sys_closefrom(ffff800039fd87e8,ffff80002ebab6a0,ffff80002ebab5f0) at sys_closefrom+0x13c sys/kern/kern_descrip.c:1471
syscall(ffff80002ebab6a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002ebab6a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x35bf82b9570, count: -20