KCSAN: data-race in do_signal_stop / do_signal

KCSAN: data-race in do_signal_stop / do_signal_stop
Status: auto-closed as invalid on 2021/07/08 01:49
Reported-by: syzbot+ba0342a3c9409763fa94@syzkaller.appspotmail.com
First crash: 496d, last: 147d

Sample crash report:

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

write to 0xffff88812c90006c of 4 bytes by task 10668 on cpu 0:
 freezer_count include/linux/freezer.h:121 [inline]
 freezable_schedule include/linux/freezer.h:173 [inline]
 do_signal_stop+0x591/0x710 kernel/signal.c:2448
 get_signal+0xa16/0x1610 kernel/signal.c:2787
 arch_do_signal_or_restart+0x2a/0x220 arch/x86/kernel/signal.c:789
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x109/0x190 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301
 do_syscall_64+0x56/0x90 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88812c90006c of 4 bytes by task 10678 on cpu 1:
 task_set_jobctl_pending kernel/signal.c:289 [inline]
 do_signal_stop+0x33e/0x710 kernel/signal.c:2407
 get_signal+0xa16/0x1610 kernel/signal.c:2787
 arch_do_signal_or_restart+0x2a/0x220 arch/x86/kernel/signal.c:789
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x109/0x190 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301
 do_syscall_64+0x56/0x90 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x40404040 -> 0x00404040

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 10678 Comm: syz-executor.2 Not tainted 5.13.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (441):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/06/03 01:48	upstream	324c92e5e0ee	0740de69	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/06/02 07:48	upstream	231bc5390667	0740de69	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/06/02 04:32	upstream	231bc5390667	032639db	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/31 17:12	upstream	c2131f7e73c9	032639db	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/31 09:15	upstream	8124c8a6b353	032639db	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/31 00:51	upstream	8124c8a6b353	325a8dab	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/30 07:07	upstream	b90e90f40b4f	325a8dab	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/29 18:19	upstream	f956cb99b938	325a8dab	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/29 15:45	upstream	6799d4f2da49	325a8dab	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/28 19:26	upstream	5ff2756afde0	858ea628	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/28 01:42	upstream	97e5bf604b7a	858ea628	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/27 12:27	upstream	d7c5303fbc8a	858ea628	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/26 23:26	upstream	7ac3a1c1ae51	858ea628	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/26 10:05	upstream	ad9f25d33860	750ce164	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/26 05:44	upstream	ad9f25d33860	93d3a9f6	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/25 16:36	upstream	a050a6d2b7e8	93d3a9f6	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/25 03:58	upstream	1434a3127887	3c7fef33	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/24 13:31	upstream	c4681547bcce	3c7fef33	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/23 23:20	upstream	6ebb6814a1ef	3c7fef33	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/23 09:03	upstream	4d7620341eda	3c7fef33	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/21 14:18	upstream	79a106fc6585	3c7fef33	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/20 17:34	upstream	f01da525b3de	c560a65d	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/17 04:55	upstream	d07f6ca923ea	f54a5c09	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/16 15:05	upstream	63d1cb53e26a	f54a5c09	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/16 01:36	upstream	c12a29ed9094	f54a5c09	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/15 07:36	upstream	25a1298726e9	8bdd5343	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/14 18:39	upstream	bd3c9cdb21a2	8bdd5343	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/13 13:24	upstream	c06a2ba62fc4	ecb594cb	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/13 08:29	upstream	c06a2ba62fc4	ed7d41c5	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/12 07:02	upstream	88b06399c9c7	86294427	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/11 18:19	upstream	88b06399c9c7	ca873091	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/10 12:21	upstream	6efb943b8616	ca873091	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/10 09:56	upstream	6efb943b8616	bc5434be	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/09 20:58	upstream	9819f682e48c	bc5434be	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/08 10:33	upstream	dd860052c99b	bc5434be	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/07 08:28	upstream	e48661230cc3	f6da8120	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/06 15:57	upstream	8404c9fbc84b	06585184	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/06 15:48	upstream	8404c9fbc84b	06585184	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/06 10:30	upstream	8404c9fbc84b	06c27ff5	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/05 21:43	upstream	a79cdfba68a1	06c27ff5	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/05 04:03	upstream	d665ea6ea86c	06c27ff5	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/05/04 13:48	upstream	5e321ded302d	06c27ff5	.config	log	report	info	KCSAN: data-race in do_signal_stop / do_signal_stop
ci2-upstream-kcsan-gce	2021/01/17 10:04	upstream	0da0a8a0a0e1	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/07/03 00:57	upstream	7cc2a8ea1048	f30c14bf	.config	log	report
ci2-upstream-kcsan-gce	2020/07/02 06:11	upstream	cd77006e01b3	bed10395	.config	log	report
ci2-upstream-kcsan-gce	2020/06/19 02:52	upstream	5e857ce6eae7	bc258b50	.config	log	report