[  94.5035934] panic: kernel diagnostic assertion "c->c_cpu->cc_lwp == curlwp || c->c_cpu->cc_active != c" failed: file "/syzkaller/managers/netbsd/kernel/sys/kern/kern_timeout.c", line 318 
[  94.5035934] cpu1: Begin traceback...
[  94.5147222] vpanic() at netbsd:vpanic+0x214
[  94.5147222] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[  94.5258509] callout_destroy() at netbsd:callout_destroy+0xcb
[  94.5369795] itimerfree() at netbsd:itimerfree+0x102
[  94.5481074] timers_free() at netbsd:timers_free+0x2ef
[  94.5592352] exit1() at netbsd:exit1+0x28f
[  94.5703652] sys_exit() at netbsd:sys_exit+0x6c
[  94.5814924] syscall() at netbsd:syscall+0x32e
[  94.5926223] --- syscall (number 1) ---
[  94.6037508] 7cc8c02fe47a:
[  94.6037508] cpu1: End traceback...

[  94.6037508] dumping to dev 4,1 (offset=0, size=0): not possible
[  94.6148783] 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