[  58.9041545] panic: kernel diagnostic assertion "dev->dv_detaching == curlwp" failed: file "/syzkaller/managers/ci2-netbsd/kernel/sys/kern/subr_autoconf.c", line 2176 
[  58.9141294] cpu1: Begin traceback...
[  58.9341311] vpanic() at netbsd:vpanic+0x282 sys/kern/subr_prf.c:293
[  58.9641320] _sub_D_65535_0() at netbsd:_sub_D_65535_0+-0x34c4
[  58.9941318] config_detach_commit() at netbsd:config_detach_commit+0x9f sys/kern/subr_autoconf.c:2176
[  59.0241327] cdev_detached() at netbsd:cdev_detached+0x155 sys/kern/subr_devsw.c:1383
[  59.0541333] vdevgone() at netbsd:vdevgone+0x1b8 sys/kern/vfs_subr.c:524
[  59.0841376] audiodetach() at netbsd:audiodetach+0xaa sys/dev/audio/audio.c:1371
[  59.1141339] config_detach() at netbsd:config_detach+0x38e sys/kern/subr_autoconf.c:2037
[  59.1441345] config_detach_children() at netbsd:config_detach_children+0xda sys/kern/subr_autoconf.c:2195
[  59.1741341] pad_detach() at netbsd:pad_detach+0x70 sys/dev/pad/pad.c:251
[  59.2041322] config_detach() at netbsd:config_detach+0x38e sys/kern/subr_autoconf.c:2037
[  59.2341352] fops_pad_close() at netbsd:fops_pad_close+0x86 pad_close sys/dev/pad/pad.c:423 [inline]
[  59.2341352] fops_pad_close() at netbsd:fops_pad_close+0x86 sys/dev/pad/pad.c:433
[  59.2641328] closef() at netbsd:closef+0x152 sys/kern/kern_descrip.c:832
[  59.2841370] fd_free() at netbsd:fd_free+0x528 sys/kern/kern_descrip.c:1571
[  59.3141337] exit1() at netbsd:exit1+0x306 sys/kern/kern_exit.c:301
[  59.3441339] sys_exit() at netbsd:sys_exit+0x92 sys/kern/kern_exit.c:180
[  59.3641320] syscall() at netbsd:syscall+0x25a sy_call sys/sys/syscallvar.h:65 [inline]
[  59.3641320] syscall() at netbsd:syscall+0x25a sy_invoke sys/sys/syscallvar.h:94 [inline]
[  59.3641320] syscall() at netbsd:syscall+0x25a sys/arch/x86/x86/syscall.c:138
[  59.3741320] --- syscall (number 1) ---
[  59.3841340] netbsd:syscall+0x25a:
[  59.3941320] cpu1: End traceback...
[  59.3941320] fatal breakpoint trap in supervisor mode
[  59.4041313] trap type 1 code 0 rip 0xffffffff80220a4d cs 0x8 rflags 0x286 cr2 0x746b8a608900 ilevel 0 rsp 0xffffa581a6cb94f0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb9010
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb8b30
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb8650
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb8170
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb7c90
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb77b0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb72d0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb6df0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb6910
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb6430
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb5f50
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb5a70
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb5590
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb50b0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa581a6cb4bd0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] fatal double fault in supervisor mode
[  59.4141299] trap type 13 code 0 rip 0xffffffff81b36c4b cs 0x8 rflags 0x10286 cr2 0xffffa581a6cb3fc8 ilevel 0x8 rsp 0xffffa581a6cb3fd0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: double fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10083 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184debc40
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184deb760
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184deb280
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184deada0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184dea8c0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184dea3e0
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184de9f00
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184de9a20
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184de9540
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184de9060
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
[  59.4141299] uvm_fault(0xffffa58012b8a888, 0xffff900000000000, 1) -> e
[  59.4141299] fatal page fault in supervisor mode
[  59.4141299] trap type 6 code 0 rip 0xffffffff81b8407b cs 0x8 rflags 0x10283 cr2 0xffff90000000003d ilevel 0x8 rsp 0xffffa58184de8b80
[  59.4141299] curlwp 0xffffa58012d804c0 pid 1765.1765 lowest kstack 0xffffa581a6cb22c0
kernel: page fault trap, code=0
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000200000000 = 8192 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID 4c614fef-0d9b-71e9-867c-db19c1491eb8
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f2490: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...

>> NetBSD/x86 BIOS Boot, Revision 5.11 (Thu Jun 11 19:20:47 UTC 2020) (from NetBSD 9.99.65)
>> Memory: 639/3144640 k

     1. Boot normally
     2. Boot single user
     3. Drop to boot prompt

Choose an option; RETURN for default; SPACE to stop countdown.
Option 1 will be chosen in 5 seconds. 4 seconds. 3 seconds. 2 seconds. 1 seconds. 0 seconds. 0 seconds.     
command(s): rndseed /var/db/entropy-file;boot
default boot twice, skipping...