assert failed: usec >= 0 && usec

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
panic: UBSan: Undefined Behavior in /syzkaller/managers/netbsd-kubsan/kernel/sys/kern/subr_time.c:LINE, signed integer o	C			2	1878d	1878d

1878d

[ 557.5985132] panic: kernel diagnostic assertion "usec >= 0 && usec < 1000000" failed: file "/syzkaller/managers/netbsd/kernel/sys/kern/subr_time.c", line 101 
[ 557.5985132] cpu1: Begin traceback...
[ 557.5985132] vpanic() at netbsd:vpanic+0x214
[ 557.6085404] _GLOBAL__sub_D_65535_0_cpu_configure() at netbsd:_GLOBAL__sub_D_65535_0_cpu_configure
[ 557.6185450] tvtohz() at netbsd:tvtohz+0x167
[ 557.6185450] tstohz() at netbsd:tstohz+0xa7
[ 557.6285601] nanosleep1() at netbsd:nanosleep1+0x1f4
[ 557.6385734] sys_clock_nanosleep() at netbsd:sys_clock_nanosleep+0x10d
[ 557.6485890] sys___syscall() at netbsd:sys___syscall+0xe2
[ 557.6686220] syscall() at netbsd:syscall+0x32e
[ 557.6686220] --- syscall (number 198) ---
[ 557.6786387] 75d5a523f4aa:
[ 557.6786387] cpu1: End traceback...

[ 557.6786387] dumping to dev 4,1 (offset=0, size=0): not possible
[ 557.6886473] 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

Crashes (31):
Time	Kernel	Commit	Syzkaller	Log	Report	Syz repro	Manager
2019/04/05 06:37	netbsd	c2452c62ad22	e5d1b3ac	console log	report	syz	ci2-netbsd
2019/03/31 07:07	netbsd	589fd51724f2	0c624d4d	console log	report	syz	ci2-netbsd
2019/03/29 10:16	netbsd	ce815d3feb61	e825006c	console log	report	syz	ci2-netbsd
2019/03/15 02:34	netbsd	871d27301b19	d72db19b	console log	report	syz	ci2-netbsd
2019/03/11 14:11	netbsd	bfb2085108a3	12365b99	console log	report	syz	ci2-netbsd
2019/07/11 07:29	netbsd	77f8c2fb33ca	ff7bf04c	console log	report		ci2-netbsd
2019/07/09 00:26	netbsd	11c2fe600e7d	f62e1e85	console log	report		ci2-netbsd
2019/07/07 07:23	netbsd	243cdbfbfdbf	f62e1e85	console log	report		ci2-netbsd
2019/07/04 07:15	netbsd	25fd1e923c2f	55565fa0	console log	report		ci2-netbsd
2019/06/28 20:41	netbsd	dda7795707c5	7509bf36	console log	report		ci2-netbsd
2019/05/16 14:47	netbsd	edebeed8da00	051c49fe	console log	report		ci2-netbsd
2019/05/07 23:54	netbsd	014f8a6c6f91	a7383bfa	console log	report		ci2-netbsd
2019/05/06 12:26	netbsd	c8ae961e35aa	d28f4ce5	console log	report		ci2-netbsd
2019/05/01 09:17	netbsd	fe3c80c3ed2d	618456b4	console log	report		ci2-netbsd
2019/05/01 00:06	netbsd	14617d2d1ea8	618456b4	console log	report		ci2-netbsd
2019/04/27 07:23	netbsd	95204173183d	b617407b	console log	report		ci2-netbsd
2019/04/21 15:09	netbsd	bcc46dedefe5	b0e8efcb	console log	report		ci2-netbsd
2019/04/20 05:33	netbsd	d67b39bf2214	b0e8efcb	console log	report		ci2-netbsd
2019/04/09 19:03	netbsd	a3063941bcec	65b612b7	console log	report		ci2-netbsd
2019/04/07 20:40	netbsd	a10759f081a1	c34fde03	console log	report		ci2-netbsd
2019/04/05 20:51	netbsd	c2452c62ad22	40f2363e	console log	report		ci2-netbsd
2019/04/05 07:59	netbsd	c2452c62ad22	e5d1b3ac	console log	report		ci2-netbsd
2019/04/05 03:14	netbsd	c2452c62ad22	e5d1b3ac	console log	report		ci2-netbsd
2019/04/04 22:06	netbsd	4585ce927211	6a475fff	console log	report		ci2-netbsd
2019/03/31 22:42	netbsd	a5a5ed5ab169	ccf2355a	console log	report		ci2-netbsd
2019/03/31 04:10	netbsd	589fd51724f2	0c624d4d	console log	report		ci2-netbsd
2019/03/29 09:05	netbsd	ce815d3feb61	e825006c	console log	report		ci2-netbsd
2019/03/21 11:36	netbsd	245e3ace1aec	f6094a8c	console log	report		ci2-netbsd
2019/03/20 10:21	netbsd	8d01f317c9a1	2458c1c6	console log	report		ci2-netbsd
2019/03/14 23:09	netbsd	871d27301b19	d72db19b	console log	report		ci2-netbsd
2019/03/11 11:08	netbsd	bfb2085108a3	12365b99	console log	report		ci2-netbsd

Crashes (31):

Assets (help?)