KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged

KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets (3)
Status: moderation: reported on 2022/01/11 13:23
Reported-by: syzbot+d1e4c3c0853cdc51ffdc@syzkaller.appspotmail.com
First crash: 78d, last: 4h24m

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets				15	591d	629d	0/22	closed as invalid on 2020/06/18 14:24
upstream	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets (2)				108	294d	461d	0/22	auto-closed as invalid on 2021/05/13 03:09

Sample crash report:

==================================================================
BUG: KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets

read to 0xffff888126344a88 of 4 bytes by interrupt on cpu 1:
 wg_cpumask_next_online drivers/net/wireguard/queueing.h:129 [inline]
 wg_queue_enqueue_per_device_and_peer drivers/net/wireguard/queueing.h:176 [inline]
 wg_packet_create_data drivers/net/wireguard/send.c:320 [inline]
 wg_packet_send_staged_packets+0x41a/0x800 drivers/net/wireguard/send.c:387
 wg_packet_send_keepalive+0xfc/0x110 drivers/net/wireguard/send.c:239
 wg_expired_send_persistent_keepalive+0x38/0x50 drivers/net/wireguard/timers.c:141
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1421
 expire_timers+0x116/0x240 kernel/time/timer.c:1466
 __run_timers+0x368/0x410 kernel/time/timer.c:1734
 run_timer_softirq+0x2e/0x60 kernel/time/timer.c:1747
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x37/0x70 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 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:110 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:551 [inline]
 acpi_idle_enter+0x282/0x300 drivers/acpi/processor_idle.c:687
 cpuidle_enter_state+0x2b4/0x7d0 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+0x1b2/0x250 kernel/sched/idle.c:306
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403
 secondary_startup_64_no_verify+0xc4/0xcb

write to 0xffff888126344a88 of 4 bytes by interrupt on cpu 0:
 wg_cpumask_next_online drivers/net/wireguard/queueing.h:133 [inline]
 wg_queue_enqueue_per_device_and_peer drivers/net/wireguard/queueing.h:176 [inline]
 wg_packet_create_data drivers/net/wireguard/send.c:320 [inline]
 wg_packet_send_staged_packets+0x455/0x800 drivers/net/wireguard/send.c:387
 wg_packet_send_keepalive+0xfc/0x110 drivers/net/wireguard/send.c:239
 wg_expired_send_persistent_keepalive+0x38/0x50 drivers/net/wireguard/timers.c:141
 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1421
 expire_timers+0x116/0x240 kernel/time/timer.c:1466
 __run_timers+0x368/0x410 kernel/time/timer.c:1734
 run_timer_softirq+0x2e/0x60 kernel/time/timer.c:1747
 __do_softirq+0x158/0x2de kernel/softirq.c:558
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x37/0x70 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x8d/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 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:110 [inline]
 acpi_idle_do_entry drivers/acpi/processor_idle.c:551 [inline]
 acpi_idle_enter+0x282/0x300 drivers/acpi/processor_idle.c:687
 cpuidle_enter_state+0x2b4/0x7d0 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+0x1b2/0x250 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 init/main.c:881
 start_kernel+0x5e4/0x669 init/main.c:1138
 secondary_startup_64_no_verify+0xc4/0xcb

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.17.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (61):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2022/01/27 17:22	upstream	626b2dda7651	64a8e201	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/27 05:43	upstream	0280e3c58f92	2cbffd88	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/25 00:49	upstream	dd81e1c7d5fb	2cbffd88	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/23 23:48	upstream	e783362eb54c	214351e1	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/21 23:24	upstream	9b57f4589857	214351e1	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/21 08:27	upstream	2c271fe77d52	ab3d9f17	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/19 12:06	upstream	e9f5cbc0c851	0620189b	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/17 08:54	upstream	79e06c4c4950	723cfaf0	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/14 17:54	upstream	871bfa02d08d	53e00b45	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/14 12:16	upstream	fb3b0673b7d5	b8d780ab	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/14 03:04	upstream	455e73a07f6e	b8d780ab	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/11 04:05	upstream	133d9c53c9dc	ddb0ab8c	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/10 10:10	upstream	df0cc57e057f	2ca0d385	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/09 18:41	upstream	4634129ad9fd	2ca0d385	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/08 15:25	upstream	d1587f7bfe9a	2ca0d385	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/07 21:47	upstream	ddec8ed2d490	2ca0d385	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/06 21:29	upstream	75acfdb6fd92	6acc789a	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/04 22:07	upstream	c9e6606c7fe9	0a2584dd	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/03 21:21	upstream	c9e6606c7fe9	4a3f34f2	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2022/01/03 09:04	upstream	c9e6606c7fe9	e1768e9c	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/31 22:41	upstream	4f3d93c6eaff	36bd2e48	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/31 00:23	upstream	9bad743e8d22	36bd2e48	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/28 20:32	upstream	ecf71de775a0	76c8cf06	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/28 09:37	upstream	a8ad9a2434dc	6b3c5e64	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/24 21:19	upstream	7a29b11da965	6caa12e4	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/23 23:09	upstream	996a18eb796a	6caa12e4	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/23 08:56	upstream	bc491fb12513	6caa12e4	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/22 03:36	upstream	1c3e979bf3e2	6caa12e4	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/20 18:23	upstream	a7904a538933	021b36cb	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/19 09:01	upstream	3f667b5d4053	44068e19	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/19 01:58	upstream	9eaa88c7036e	44068e19	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/17 05:39	upstream	fa36bbe6d43f	44068e19	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/16 20:56	upstream	fa36bbe6d43f	8dd6a5e3	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/16 16:59	upstream	2b14864acbaa	8dd6a5e3	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/16 09:32	upstream	2b14864acbaa	572bcb40	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/15 09:13	upstream	5472f14a3742	f752fb53	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/14 15:53	upstream	5472f14a3742	d018dd31	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/14 06:44	upstream	5472f14a3742	5d14b1ea	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/12 21:58	upstream	90d9fbc16b69	49ca1f59	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/12 06:09	upstream	a763d5a5abd6	49ca1f59	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/10 09:31	upstream	ded746bfc943	4d4ce9bc	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/09 22:09	upstream	ded746bfc943	b54aa474	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/09 06:14	upstream	2a987e65025e	a4a2a501	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/07 23:24	upstream	cd8c917a56f2	0230ba3e	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/07 02:01	upstream	f80ef9e49fdf	0230ba3e	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/06 19:16	upstream	0fcfb00b28c0	579a8754	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/04 12:53	upstream	12119cfa1052	a617004c	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/12/02 11:33	upstream	58e1100fdc59	61f86278	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/30 10:53	upstream	d58071a8a76d	80270552	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/29 17:15	upstream	d58071a8a76d	d0830353	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/28 15:44	upstream	3498e7f2bb41	63eeac02	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/28 04:41	upstream	741392771338	63eeac02	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/26 04:16	upstream	b501b85957de	63eeac02	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/25 12:34	upstream	5f53fa508db0	545ab074	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/22 23:13	upstream	136057256686	545ab074	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/22 03:06	upstream	40c93d7fff6f	4eb20a4e	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/20 11:33	upstream	a90af8f15bdc	4eb20a4e	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/14 13:58	upstream	c8c109546a19	75b04091	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/14 02:31	upstream	a9b9669d9822	75b04091	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/11 16:35	upstream	debe436e77c7	75b04091	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets
ci2-upstream-kcsan-gce	2021/11/10 04:03	upstream	cb690f5238d7	55fa030c	.config	log	report	info	KCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets