[ 2123.2102941] panic: kernel diagnostic assertion "to_ticks >= 0" failed: file "/syzkaller/managers/netbsd/kernel/sys/kern/kern_timeout.c", line 335 [ 2123.2203112] cpu1: Begin traceback... [ 2123.2303312] vpanic() at netbsd:vpanic+0x214 [ 2123.2403518] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure [ 2123.2603888] callout_schedule_locked() at netbsd:callout_schedule_locked+0x25b [ 2123.2704169] sleepq_block() at netbsd:sleepq_block+0x2e9 [ 2123.2904456] cv_timedwait_sig() at netbsd:cv_timedwait_sig+0x16f [ 2123.3004650] sbwait() at netbsd:sbwait+0xa2 [ 2123.3104837] soreceive() at netbsd:soreceive+0x14ec [ 2123.3205042] do_filereadv() at netbsd:do_filereadv+0x42e [ 2123.3305231] sys___syscall() at netbsd:sys___syscall+0xe2 [ 2123.3405399] syscall() at netbsd:syscall+0x32e [ 2123.3505942] --- syscall (number 198) --- [ 2123.3505942] 7ad86f23f4aa: [ 2123.3605887] cpu1: End traceback... [ 2123.3605887] dumping to dev 4,1 (offset=0, size=0): not possible [ 2123.3705992] 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 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