Warning: Permanently added '10.128.1.11' (ECDSA) to the list of known hosts. executing program [ 30.8298560] panic: kernel diagnostic assertion "to_ticks >= 0" failed: file "/syzkaller/managers/netbsd/kernel/sys/kern/kern_timeout.c", line 335 [ 30.8298560] cpu0: Begin traceback... [ 30.8298560] vpanic() at netbsd:vpanic+0x214 [ 30.8298560] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure [ 30.8298560] callout_schedule_locked() at netbsd:callout_schedule_locked+0x25b [ 30.8298560] change_keepalive() at netbsd:change_keepalive+0x104 [ 30.8298560] tcp_ctloutput() at netbsd:tcp_ctloutput+0x410 [ 30.8298560] tcp_ctloutput_wrapper() at netbsd:tcp_ctloutput_wrapper+-0x5d22f [ 30.8298560] sosetopt() at netbsd:sosetopt+0x115 [ 30.8298560] sys_setsockopt() at netbsd:sys_setsockopt+0x187 [ 30.8298560] sys_syscall() at netbsd:sys_syscall+0xe2 [ 30.8298560] syscall() at netbsd:syscall+0x348 [ 30.8298560] --- syscall (number 0) --- [ 30.8298560] 77428143f4ca: [ 30.8298560] cpu0: End traceback... [ 30.8298560] dumping to dev 4,1 (offset=0, size=0): not possible [ 30.8298560] rebooting... SeaBIOS (version 1.8.2-20190322_093631-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 0x000f29d0: 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