KCSAN: data-race in do_nanosleep / mm_update_next

KCSAN: data-race in do_nanosleep / mm_update_next_owner (3)
Status: auto-closed as invalid on 2021/07/07 20:29
Reported-by: syzbot+81dc40b3b7b55e9590bd@syzkaller.appspotmail.com
First crash: 623d, last: 63d

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in do_nanosleep / mm_update_next_owner				3	665d	671d	0/22	closed as invalid on 2019/10/15 15:50
upstream	KCSAN: data-race in do_nanosleep / mm_update_next_owner (2)				29	627d	659d	0/22	closed as invalid on 2019/11/19 14:04

Sample crash report:

==================================================================
BUG: KCSAN: data-race in do_nanosleep / mm_update_next_owner

write to 0xffff88810082802c of 4 bytes by task 1763 on cpu 1:
 freezer_count include/linux/freezer.h:121 [inline]
 freezable_schedule include/linux/freezer.h:173 [inline]
 do_nanosleep+0x121/0x3d0 kernel/time/hrtimer.c:1896
 hrtimer_nanosleep+0xfa/0x1f0 kernel/time/hrtimer.c:1949
 common_nsleep+0x69/0x80 kernel/time/posix-timers.c:1227
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1267 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1245 [inline]
 __x64_sys_clock_nanosleep+0x1ee/0x220 kernel/time/posix-timers.c:1245
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88810082802c of 4 bytes by task 8722 on cpu 0:
 mm_update_next_owner+0x1d9/0x520 kernel/exit.c:389
 exit_mm+0x358/0x450 kernel/exit.c:501
 do_exit+0x3ff/0x1560 kernel/exit.c:813
 do_group_exit+0x19b/0x1a0 kernel/exit.c:923
 __do_sys_exit_group+0xb/0x10 kernel/exit.c:934
 __se_sys_exit_group+0x5/0x10 kernel/exit.c:932
 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:932
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x40404140 -> 0x00404140

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8722 Comm: syz-executor.3 Not tainted 5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (1238):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/06/02 20:28	upstream	324c92e5e0ee	0740de69	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/06/02 07:20	upstream	231bc5390667	0740de69	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/06/02 04:44	upstream	231bc5390667	032639db	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/31 17:25	upstream	c2131f7e73c9	032639db	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/31 09:08	upstream	8124c8a6b353	032639db	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/31 00:34	upstream	8124c8a6b353	325a8dab	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/29 15:49	upstream	6799d4f2da49	325a8dab	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/29 09:18	upstream	6799d4f2da49	858ea628	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/28 19:34	upstream	5ff2756afde0	858ea628	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/28 01:58	upstream	97e5bf604b7a	858ea628	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/27 12:22	upstream	d7c5303fbc8a	858ea628	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/26 22:53	upstream	7ac3a1c1ae51	858ea628	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/26 10:30	upstream	ad9f25d33860	750ce164	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/26 05:55	upstream	ad9f25d33860	93d3a9f6	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/25 04:11	upstream	1434a3127887	3c7fef33	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/24 13:20	upstream	c4681547bcce	3c7fef33	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/24 00:42	upstream	6ebb6814a1ef	3c7fef33	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/22 18:36	upstream	23d729263037	3c7fef33	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/22 04:07	upstream	45af60e7ced0	3c7fef33	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/21 14:11	upstream	79a106fc6585	3c7fef33	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/21 01:45	upstream	ba816d3c265c	3c7fef33	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/20 17:31	upstream	f01da525b3de	c560a65d	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/19 17:23	upstream	c3d0e3fd41b7	a343ba6b	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/17 22:29	upstream	8ac91e6c6033	a343ba6b	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/16 15:16	upstream	63d1cb53e26a	f54a5c09	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/16 01:54	upstream	c12a29ed9094	f54a5c09	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/15 10:32	upstream	25a1298726e9	93f844de	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/15 07:44	upstream	25a1298726e9	8bdd5343	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/13 13:34	upstream	c06a2ba62fc4	ecb594cb	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/12 19:47	upstream	dbb5afad100a	ed7d41c5	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/12 07:44	upstream	88b06399c9c7	86294427	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/11 18:21	upstream	88b06399c9c7	ca873091	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/11 01:40	upstream	1140ab592e2e	ca873091	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/10 12:32	upstream	6efb943b8616	ca873091	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/09 21:03	upstream	9819f682e48c	bc5434be	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/08 10:29	upstream	dd860052c99b	bc5434be	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/07 22:14	upstream	1ad77a05cfae	bc5434be	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/07 04:53	upstream	e48661230cc3	06585184	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/06 15:00	upstream	8404c9fbc84b	06585184	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/05 03:10	upstream	d665ea6ea86c	06c27ff5	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/04 14:46	upstream	5e321ded302d	06c27ff5	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/04 02:16	upstream	5e321ded302d	09efdd63	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/03 19:05	upstream	6f8ee8d36d07	ad61f371	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/03 14:10	upstream	9ccce092fc64	ad61f371	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/03 04:13	upstream	9ccce092fc64	77e2b668	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/01 23:07	upstream	10a3efd0fee5	77e2b668	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/05/01 09:28	upstream	9f67672a817e	77e2b668	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/04/29 11:20	upstream	d72cd4ad4174	77e2b668	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/04/28 21:05	upstream	68a32ba14177	77e2b668	.config	log	report	info	KCSAN: data-race in do_nanosleep / mm_update_next_owner
ci2-upstream-kcsan-gce	2021/01/17 10:09	upstream	0da0a8a0a0e1	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/01/16 11:38	https://github.com/google/ktsan.git kcsan	245a43005292	3de7aabb	.config	log	report
ci2-upstream-kcsan-gce	2020/01/14 19:25	https://github.com/google/ktsan.git kcsan	245a43005292	fa12bd3c	.config	log	report
ci2-upstream-kcsan-gce	2019/11/20 22:17	https://github.com/google/ktsan.git kcsan	5863cc791e4c	8098ea0f	.config	log	report