KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop

KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
Status: moderation: reported on 2020/09/21 17:51
Reported-by: syzbot+56078ac0b9071335a745@syzkaller.appspotmail.com
First crash: 408d, last: 1d15h

Sample crash report:

==================================================================
BUG: KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick

write to 0xffffffff838c1c10 of 4 bytes by task 0 on cpu 0:
 tick_nohz_stop_tick+0x99/0x3e0 kernel/time/tick-sched.c:873
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1062 [inline]
 tick_nohz_idle_stop_tick+0x15d/0x310 kernel/time/tick-sched.c:1083
 cpuidle_idle_call kernel/sched/idle.c:235 [inline]
 do_idle+0x186/0x240 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 rest_init+0xee/0x100 init/main.c:714
 arch_call_rest_init+0xa/0xb
 start_kernel+0x5ae/0x633 init/main.c:1120
 secondary_startup_64_no_verify+0xb0/0xbb

read to 0xffffffff838c1c10 of 4 bytes by task 0 on cpu 1:
 tick_nohz_next_event+0x217/0x300 kernel/time/tick-sched.c:838
 tick_nohz_get_sleep_length+0x121/0x280 kernel/time/tick-sched.c:1192
 menu_select+0x303/0x1040 drivers/cpuidle/governors/menu.c:283
 cpuidle_select+0x3d/0x50 drivers/cpuidle/cpuidle.c:322
 cpuidle_idle_call kernel/sched/idle.c:232 [inline]
 do_idle+0x16f/0x240 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 secondary_startup_64_no_verify+0xb0/0xbb

value changed: 0x00000000 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G        W         5.14.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (497):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/07/30 19:29	upstream	4669e13cd67f	6c236867	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/30 17:00	upstream	764a5bc89b12	6c236867	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/30 07:17	upstream	764a5bc89b12	c585c7b0	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/30 04:58	upstream	7e96bf476270	c585c7b0	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/29 17:18	upstream	7e96bf476270	8a799410	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/29 04:25	upstream	4010a528219e	b44001ce	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/28 19:50	upstream	4010a528219e	9a4781d4	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/28 16:16	upstream	7d549995d4e0	9a4781d4	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/27 21:48	upstream	7d549995d4e0	17d6ab15	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/26 07:09	upstream	ff1176468d36	fd511809	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/26 03:07	upstream	ff1176468d36	4d1b57d4	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/25 13:22	upstream	d8079fac1681	4d1b57d4	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/24 23:56	upstream	7ffca2bb9d8b	4d1b57d4	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/24 10:15	upstream	f0fddcec6b62	4d1b57d4	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/24 05:53	upstream	f0fddcec6b62	bc5f1d88	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/23 13:44	upstream	8baef6386baa	bc5f1d88	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/23 01:17	upstream	9bead1b58c4c	bc5f1d88	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/22 11:24	upstream	3d5895cd3517	241790bb	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/22 09:29	upstream	3d5895cd3517	29c3f20f	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/21 20:15	upstream	7b6ae471e541	29c3f20f	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/21 13:43	upstream	8cae8cd89f05	29c3f20f	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/20 12:03	upstream	2734d6c1b1a0	1b201b48	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/19 22:39	upstream	2734d6c1b1a0	bc48c9ab	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/19 08:26	upstream	2734d6c1b1a0	f115ae98	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/18 02:47	upstream	1d67c8d993ba	f115ae98	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/17 12:06	upstream	d980cc0620ae	f115ae98	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/17 01:37	upstream	0d18c12b288a	f115ae98	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/16 11:49	upstream	d936eb238744	f115ae98	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/15 16:25	upstream	8096acd7442e	f115ae98	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/15 01:09	upstream	8096acd7442e	b9a2f64e	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/14 16:58	upstream	8096acd7442e	94e0b707	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/14 12:29	upstream	40226a3d96ef	94e0b707	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/14 01:39	upstream	40226a3d96ef	484502bd	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/13 12:07	upstream	7fef2edf7cc7	70168d5c	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/12 23:09	upstream	7fef2edf7cc7	f415556d	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/12 17:38	upstream	e73f0f0ee754	f415556d	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/12 07:18	upstream	e73f0f0ee754	a4869c92	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/11 19:15	upstream	98f7fdced2e0	8f5a7b8c	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/09 20:39	upstream	3dbdb38e2869	8f5a7b8c	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/09 08:58	upstream	3dbdb38e2869	281e815f	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/08 19:39	upstream	3dbdb38e2869	1b20171a	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/08 06:53	upstream	3dbdb38e2869	1aade754	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/07 19:28	upstream	3dbdb38e2869	95793bce	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/07 07:08	upstream	3dbdb38e2869	4846d5c1	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/06 06:44	upstream	3dbdb38e2869	6c4484eb	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/02 18:55	upstream	3dbdb38e2869	55aa55c2	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/02 12:35	upstream	3dbdb38e2869	658ebc66	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/07/01 22:37	upstream	e058a84bfddc	658ebc66	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/01/17 12:23	upstream	0da0a8a0a0e1	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/21 07:59	upstream	ba4f184e126b	c81d99c8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/18 13:23	upstream	10b82d517648	38962c8b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/06/18 22:05	upstream	1b5044021070	3ea11d3f	.config	log	report