login: [  45.8033615] panic: kernel diagnostic assertion "mutex_owned(pipe->pipe_lock)" failed: file "/syzkaller/managers/netbsd/kernel/sys/kern/sys_pipe.c", line 371 
[  45.8133818] cpu1: Begin traceback...
[  45.8234073] vpanic() at netbsd:vpanic+0x214
[  45.8334201] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[  45.8434386] pipelock() at netbsd:pipelock+0xb0
[  45.8634789] pipe_write() at netbsd:pipe_write+0x99
[  45.8734987] do_filewritev() at netbsd:do_filewritev+0x438
[  45.8835169] sys___syscall() at netbsd:sys___syscall+0xe2
[  45.8935348] syscall() at netbsd:syscall+0x32e
[  45.9035536] --- syscall (number 198) ---
[  45.9035536] 7dec2963f4aa:
[  45.9135749] cpu1: End traceback...

[  45.9135749] dumping to dev 4,1 (offset=0, size=0): not possible
[  45.9235939] rebooting...
SeaBIOS (version 1.8.2-20190122_225043-google)
Total RAM Size = 0x00000001e0000000 = 7680 MiB
CPUs found: 2     Max CPUs supported: 2
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 0x000f29c0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Booting from Hard Disk 0...

>> NetBSD/x86 BIOS Boot, Revision 5.10 (Tue Jul 17 14:59:51 UTC 2018) (from NetBSD 8.0)
>> Memory: 639/3144640 k

     1. Boot normally
     2. Boot single user
     3. Disable ACPI
     4. Disable ACPI and SMP
     5. Drop to boot prompt