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: 529d, last: 4h53m

Sample crash report:

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

write to 0xffffffff85ebdfe0 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick+0xa5/0x420 kernel/time/tick-sched.c:873
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1062 [inline]
 tick_nohz_idle_stop_tick+0xf2/0x1c0 kernel/time/tick-sched.c:1083
 cpuidle_idle_call kernel/sched/idle.c:235 [inline]
 do_idle+0x195/0x250 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 secondary_startup_64_no_verify+0xb1/0xbb

read to 0xffffffff85ebdfe0 of 4 bytes by task 0 on cpu 0:
 tick_nohz_next_event+0x236/0x320 kernel/time/tick-sched.c:838
 tick_nohz_get_sleep_length+0xca/0x140 kernel/time/tick-sched.c:1192
 menu_select+0x34d/0x10a0 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+0x17e/0x250 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 rest_init+0xfa/0x100 init/main.c:725
 arch_call_rest_init+0xa/0xb
 start_kernel+0x5e4/0x669 init/main.c:1135
 secondary_startup_64_no_verify+0xb1/0xbb

value changed: 0x00000001 -> 0xffffffff

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (687):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/11/29 22:55	upstream	d58071a8a76d	d0830353	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/22 13:04	upstream	136057256686	545ab074	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/22 08:56	upstream	40c93d7fff6f	4eb20a4e	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/21 18:25	upstream	923dcc5eb0c1	4eb20a4e	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/18 21:23	upstream	6fdf886424cf	31a30fc0	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/18 13:56	upstream	42eb8fdac2fc	31a30fc0	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/16 10:43	upstream	8ab774587903	600426bd	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/15 14:19	upstream	8ab774587903	75b04091	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/15 03:35	upstream	ce49bfc8d037	75b04091	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/14 12:55	upstream	c8c109546a19	75b04091	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/13 04:38	upstream	66f4beaa6c1d	75b04091	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/12 20:29	upstream	5833291ab6de	75b04091	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/12 08:37	upstream	ca2ef2d9f2aa	75b04091	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/10 05:15	upstream	cb690f5238d7	55fa030c	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/09 16:31	upstream	d2f38a3c6507	59bcaf9a	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/08 23:38	upstream	e851dfae4371	8ab17e57	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/08 21:06	upstream	e851dfae4371	d29682f1	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/08 11:52	upstream	6b75d88fa81b	d29682f1	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/08 00:19	upstream	6b75d88fa81b	4c1be0be	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/07 11:59	upstream	b5013d084e03	4c1be0be	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/06 22:20	upstream	512b7931ad05	4c1be0be	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/05 18:57	upstream	fe91c4725aee	4c1be0be	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/05 05:57	upstream	d4439a1189f9	4c1be0be	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/04 16:51	upstream	7ddb58cb0eca	4c1be0be	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/04 03:17	upstream	ce840177930f	4c1be0be	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/03 09:39	upstream	56d33754481f	17f3edd2	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/02 11:59	upstream	bfc484fe6abb	098b5d53	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/01 22:54	upstream	e66435936756	098b5d53	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/11/01 04:23	upstream	8bb7eca972ad	098b5d53	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/31 16:52	upstream	180eca540ae0	098b5d53	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/30 22:06	upstream	119c85055d86	098b5d53	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/30 06:04	upstream	a379fbbcb88b	098b5d53	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/29 09:40	upstream	f25a5481af12	2353a3ec	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/27 23:05	upstream	1fc596a56b33	be531bb4	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/27 13:53	upstream	d25f27432f80	be531bb4	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/27 12:35	upstream	d25f27432f80	373bf66b	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/27 04:35	upstream	d25f27432f80	d50eb50a	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/26 13:00	upstream	3906fe9bb7f1	d50eb50a	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/25 17:24	upstream	87066fdd2e30	4f0000ee	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/24 23:19	upstream	6c62666d8879	4f0000ee	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/23 06:01	upstream	9c0c4d24ac00	282f03fb	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/22 14:13	upstream	64222515138e	55f90bc6	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/21 19:48	upstream	2f111a6fd5b5	55f90bc6	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/21 14:47	upstream	2f111a6fd5b5	c5cb7da8	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/20 23:41	upstream	2f111a6fd5b5	f111d03b	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/20 11:14	upstream	d9abdee5fd5a	418a00eb	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/19 17:20	upstream	d9abdee5fd5a	466b7db1	.config	log	report	info	KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick
ci2-upstream-kcsan-gce	2021/10/18 16:53	upstream	519d81956ee2	24dc29db	.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