KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx

KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
Status: moderation: reported on 2020/08/17 17:51
Reported-by: syzbot+a35e14c38686fcb3df17@syzkaller.appspotmail.com
First crash: 306d, last: 6d20h

Sample crash report:

==================================================================
BUG: KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll

write to 0xffff88802921f088 of 8 bytes by interrupt on cpu 1:
 counter_validate drivers/net/wireguard/receive.c:327 [inline]
 wg_packet_rx_poll+0x406/0x11b0 drivers/net/wireguard/receive.c:467
 __napi_poll+0x65/0x3e0 net/core/dev.c:6912
 napi_poll net/core/dev.c:6979 [inline]
 net_rx_action+0x29f/0x680 net/core/dev.c:7066
 __do_softirq+0x13c/0x2c3 kernel/softirq.c:345
 do_softirq+0x73/0xa0 kernel/softirq.c:248
 __local_bh_enable_ip+0x5a/0x60 kernel/softirq.c:198
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x33/0x40 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 ptr_ring_consume_bh include/linux/ptr_ring.h:367 [inline]
 wg_packet_decrypt_worker+0x732/0x770 drivers/net/wireguard/receive.c:505
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x616/0xa70 kernel/workqueue.c:2421
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff88802921f088 of 8 bytes by task 9687 on cpu 0:
 decrypt_packet drivers/net/wireguard/receive.c:258 [inline]
 wg_packet_decrypt_worker+0x219/0x770 drivers/net/wireguard/receive.c:507
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x616/0xa70 kernel/workqueue.c:2421
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 9687 Comm: kworker/0:5 Not tainted 5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: wg-crypt-wg0 wg_packet_decrypt_worker
==================================================================

Crashes (253):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/04/15 04:00	upstream	7f75285c	fcdb12ba	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/04/14 13:27	upstream	50987bec	3134b37f	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/04/12 16:10	upstream	d434405a	6a81331a	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/04/10 12:48	upstream	4e04e751	6a81331a	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/04/06 23:54	upstream	2d743660	6a81331a	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/04/04 04:51	upstream	2023a53b	6a81331a	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/04/03 04:28	upstream	0a84c2e4	6a81331a	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/04/02 19:40	upstream	1678e493	6a81331a	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/30 16:53	upstream	2bb25b3a	6a81331a	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/28 15:51	upstream	0f4498ce	a8529b82	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/26 14:53	upstream	db24726b	a8529b82	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/25 14:00	upstream	e1381380	6a383ecf	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/23 06:34	upstream	0d02ec6b	8092f30d	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/22 14:01	upstream	5ee96fa9	bea32f74	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/22 01:16	upstream	5ee96fa9	4c9a64da	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/21 03:47	upstream	812da4d3	17810eae	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/20 01:57	upstream	8b12a62a	3d01c4de	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/19 12:12	upstream	8b12a62a	2af9d324	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/18 05:33	upstream	6417f031	fdb2bb2c	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/17 03:16	upstream	1df27313	fdb2bb2c	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/16 08:03	upstream	1a4431a5	fdb2bb2c	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/15 13:53	upstream	1e28eed1	cc1cff8f	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/13 23:49	upstream	88fe4924	4a003785	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/13 11:04	upstream	f296bfd5	4a003785	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/11 23:27	upstream	28806e4d	429d8a6b	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/11 16:06	upstream	a74e6a01	c2ca1f2a	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/10 20:52	upstream	05a59d79	764067f3	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/08 02:14	upstream	144c79ef	09fbf400	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/03/04 20:23	upstream	cee407c5	f89ed068	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/24 07:33	upstream	c03c21ba	fcc6d71b	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/23 06:11	upstream	b12b4724	fcc6d71b	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/21 06:39	upstream	e767b353	3e5ed8b4	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/17 22:37	upstream	f40ddce8	14052202	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/17 09:01	upstream	f40ddce8	052f8d9f	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/14 20:40	upstream	358fecee	98682e5e	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/14 05:51	upstream	ac30d8ce	98682e5e	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/13 13:34	upstream	c6d8570e	98682e5e	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/11 18:04	upstream	291009f6	a5f86b15	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/10 11:08	upstream	e0756cfc	9c8b8541	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/07 09:32	upstream	825b5991	2ce644fc	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/07 00:09	upstream	964d069f	0655e081	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/05 03:18	upstream	5c279c4c	23a562df	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/03 04:25	upstream	3aaf0a27	624dad51	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/02/02 12:22	upstream	88bb507a	19e09687	.config	log	report	info	KCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll
ci2-upstream-kcsan-gce	2021/01/17 11:39	upstream	0da0a8a0	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/08/17 03:17	upstream	2cc3c4b3	5ce13532	.config	log	report
ci2-upstream-kcsan-gce	2020/06/19 16:18	upstream	5e857ce6	123cf502	.config	log	report