login: [  75.3797734] panic: kernel diagnostic assertion "requested_size > 0" failed: file "/syzkaller/managers/netbsd/kernel/sys/kern/subr_kmem.c", line 234 
[  75.3922942] cpu1: Begin traceback...
[  75.3922942] vpanic() at netbsd:vpanic+0x214
[  75.4048153] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[  75.4298572] kmem_intr_alloc() at netbsd:kmem_intr_alloc+0x20c
[  75.4423781] kmem_alloc() at netbsd:kmem_alloc+0x4a
[  75.4548962] ufs_readdir() at netbsd:ufs_readdir+0x1c6
[  75.4674162] VOP_READDIR() at netbsd:VOP_READDIR+0xd2
[  75.4799365] vn_readdir() at netbsd:vn_readdir+0x1ff
[  75.4924576] sys___getdents30() at netbsd:sys___getdents30+0x157
[  75.5049783] sys___syscall() at netbsd:sys___syscall+0xe2
[  75.5175003] syscall() at netbsd:syscall+0x30e
[  75.5300186] --- syscall (number 198) ---
[  75.5300186] 7b2f1083f4aa:
[  75.5425394] cpu1: End traceback...

[  75.5425394] dumping to dev 4,1 (offset=0, size=0): not possible
[  75.5550596] rebooting...
SeaBIOS (version 1.8.2-20181029_212248-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 0x000f2a00: 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