KCSAN: data-race in watchdog / worker

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in watchdog / worker_thread (2) kasan				47	1413d	1609d	0/26	closed as invalid on 2020/06/18 14:24

==================================================================
BUG: KCSAN: data-race in watchdog / worker_thread

write to 0xffff8880b9307110 of 8 bytes by task 9475 on cpu 0:
 worker_thread+0x1c3/0x800 kernel/workqueue.c:2434
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

read to 0xffff8880b9307110 of 8 bytes by task 1061 on cpu 1:
 check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline]
 watchdog+0x2c3/0x7c0 kernel/hung_task.c:289
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1061 Comm: khungtaskd Not tainted 5.4.0-rc6+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 1061 Comm: khungtaskd Not tainted 5.4.0-rc6+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf5/0x159 lib/dump_stack.c:113
 panic+0x210/0x640 kernel/panic.c:221
 kcsan_report.cold+0xc/0xe kernel/kcsan/report.c:302
 kcsan_setup_watchpoint+0x3fe/0x410 kernel/kcsan/core.c:357
 check_access kernel/kcsan/core.c:409 [inline]
 __tsan_read8+0x145/0x1f0 kernel/kcsan/core.c:530
 check_hung_uninterruptible_tasks kernel/hung_task.c:197 [inline]
 watchdog+0x2c3/0x7c0 kernel/hung_task.c:289
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..

Time	Kernel	Commit	Syzkaller	Config	Log	Report	Manager
2019/11/10 01:09	https://github.com/google/ktsan.git kcsan	94c006602e13	dc438b91	.config	console log	report	ci2-upstream-kcsan-gce
2019/11/07 00:09	https://github.com/google/ktsan.git kcsan	94c006602e13	da505f84	.config	console log	report	ci2-upstream-kcsan-gce
2019/10/30 21:40	https://github.com/google/ktsan.git kcsan	05f2236801fe	a41ca8fa	.config	console log	report	ci2-upstream-kcsan-gce
2019/10/30 13:27	https://github.com/google/ktsan.git kcsan	05f2236801fe	5ea87a66	.config	console log	report	ci2-upstream-kcsan-gce
2019/10/26 15:05	https://github.com/google/ktsan.git kcsan	05f2236801fe	25bb509e	.config	console log	report	ci2-upstream-kcsan-gce
2019/10/25 07:37	https://github.com/google/ktsan.git kcsan	05f2236801fe	d01bb02a	.config	console log	report	ci2-upstream-kcsan-gce