KCSAN: data-race in internal_add_timer / timer_clear

KCSAN: data-race in internal_add_timer / timer_clear_idle
Status: moderation: reported on 2020/12/07 11:53
Reported-by: syzbot+b130e0d14518a7e0d5bf@syzkaller.appspotmail.com
First crash: 256d, last: 18h39m

Sample crash report:

==================================================================
BUG: KCSAN: data-race in internal_add_timer / timer_clear_idle

write to 0xffff888237d1b6a5 of 1 bytes by task 0 on cpu 1:
 timer_clear_idle+0x1e/0x30 kernel/time/timer.c:1713
 tick_nohz_idle_retain_tick+0x31/0x40 kernel/time/tick-sched.c:1054
 cpuidle_idle_call kernel/sched/idle.c:237 [inline]
 do_idle+0x1e0/0x240 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 secondary_startup_64_no_verify+0xb0/0xbb

read to 0xffff888237d1b6a5 of 1 bytes by interrupt on cpu 0:
 trigger_dyntick_cpu kernel/time/timer.c:568 [inline]
 enqueue_timer kernel/time/timer.c:599 [inline]
 internal_add_timer+0x211/0x260 kernel/time/timer.c:609
 add_timer_on+0x262/0x2a0 kernel/time/timer.c:1180
 clocksource_watchdog+0x736/0x780 kernel/time/clocksource.c:303
 call_timer_fn+0x2e/0x1d0 kernel/time/timer.c:1431
 expire_timers+0x135/0x250 kernel/time/timer.c:1476
 __run_timers+0x358/0x420 kernel/time/timer.c:1745
 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1758
 __do_softirq+0x12c/0x275 kernel/softirq.c:559
 invoke_softirq kernel/softirq.c:433 [inline]
 __irq_exit_rcu+0xa5/0xb0 kernel/softirq.c:637
 sysvec_apic_timer_interrupt+0x69/0x80 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
 acpi_safe_halt drivers/acpi/processor_idle.c:108 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:513 [inline]
 acpi_idle_enter+0x25b/0x2e0 drivers/acpi/processor_idle.c:648
 cpuidle_enter_state+0x2b6/0x750 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x3c/0x60 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:158 [inline]
 cpuidle_idle_call kernel/sched/idle.c:239 [inline]
 do_idle+0x1a3/0x240 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 rest_init+0xc9/0xd0 init/main.c:721
 arch_call_rest_init+0xa/0xb
 start_kernel+0x59e/0x623 init/main.c:1087
 secondary_startup_64_no_verify+0xb0/0xbb

value changed: 0x01 -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (53):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/06/19 12:57	upstream	9ed13a17	aba2b2fb	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/18 21:52	upstream	b1edae0d	aba2b2fb	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/18 11:54	upstream	fd0aa1a4	aba2b2fb	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/16 14:31	upstream	94f0b2d4	c06f97ad	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/15 14:36	upstream	009c9aa5	8022d7e3	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/10 12:47	upstream	cd1245d7	1ba81399	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/06 02:49	upstream	f5b6eb1e	500c2339	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/05 21:52	upstream	9d32fa5d	500c2339	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/04 19:13	upstream	16f0596f	966a236b	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/04 14:35	upstream	f88cd3fb	966a236b	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/06/01 00:16	upstream	c2131f7e	032639db	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/30 18:20	upstream	b90e90f4	325a8dab	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/29 19:03	upstream	f956cb99	325a8dab	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/28 04:33	upstream	97e5bf60	858ea628	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/25 20:42	upstream	a050a6d2	93d3a9f6	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/25 12:10	upstream	1434a312	3c7fef33	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/25 00:09	upstream	c4681547	3c7fef33	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/21 17:20	upstream	79a106fc	3c7fef33	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/20 17:28	upstream	f01da525	c560a65d	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/18 05:43	upstream	8ac91e6c	a343ba6b	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/17 09:45	upstream	d07f6ca9	a2eb125d	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/17 06:42	upstream	d07f6ca9	f54a5c09	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/15 13:00	upstream	25a12987	93f844de	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/13 18:50	upstream	c06a2ba6	ecb594cb	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/13 01:48	upstream	dbb5afad	ed7d41c5	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/11 23:28	upstream	88b06399	b3c3bb8e	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/10 06:09	upstream	9819f682	bc5434be	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/08 19:12	upstream	dd860052	bc5434be	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/03 17:14	upstream	9ccce092	ad61f371	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/05/01 23:11	upstream	10a3efd0	77e2b668	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/04/28 21:36	upstream	68a32ba1	77e2b668	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/04/26 09:51	upstream	9f4ad9e4	805b5003	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/04/25 19:01	upstream	d2d09fbe	36c88236	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/04/24 21:59	upstream	2a1d7946	17f0b706	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/04/23 09:42	upstream	90c911ad	590921a5	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/04/16 23:50	upstream	2f7b98d1	7e2b734b	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/03/27 00:59	upstream	0f4498ce	a8529b82	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/03/06 18:50	upstream	a38fd874	e4b4d570	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/02/21 10:28	upstream	e767b353	3e5ed8b4	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/02/17 23:02	upstream	f40ddce8	14052202	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/02/17 13:53	upstream	f40ddce8	052f8d9f	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/02/17 02:04	upstream	f40ddce8	98682e5e	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/02/12 13:30	upstream	dcc0b490	a5f86b15	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/02/04 21:24	upstream	61556703	42b90a7c	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/02/04 02:09	upstream	3afe9076	624dad51	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/02/02 02:19	upstream	88bb507a	e6b95f32	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/01/20 10:04	upstream	45dfb8a5	d4f4eca5	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2021/01/18 16:32	upstream	19c329f6	63631df1	.config	log	report	info	KCSAN: data-race in internal_add_timer / timer_clear_idle
ci2-upstream-kcsan-gce	2020/12/22 11:55	upstream	8653b778	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/20 22:39	upstream	4d02da97	68068804	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/17 23:08	upstream	111e91a6	09323409	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/26 08:12	upstream	986b9eac	a1839e81	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/06 09:53	upstream	7575fdda	1880b4a9	.config	log	report	info