KCSAN: data-race in isolate_migratepages_block / isolate_migratepages

KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block (3)
Status: moderation: reported on 2020/12/07 11:39
Reported-by: syzbot+2b92826e21d4cff38c09@syzkaller.appspotmail.com
First crash: 140d, last: 6d16h

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block				1	455d	455d	0/22	auto-closed as invalid on 2020/04/01 04:50
upstream	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block (2)				1	262d	262d	0/22	auto-closed as invalid on 2020/09/05 12:48

Sample crash report:

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

write to 0xffff88823fff9298 of 8 bytes by task 26069 on cpu 0:
 update_cached_migrate mm/compaction.c:437 [inline]
 isolate_migratepages_block+0x19d3/0x1c90 mm/compaction.c:1122
 isolate_migratepages mm/compaction.c:1892 [inline]
 compact_zone+0x1597/0x1e60 mm/compaction.c:2342
 compact_node+0x128/0x1e0 mm/compaction.c:2641
 compact_nodes mm/compaction.c:2657 [inline]
 sysctl_compaction_handler+0x47/0x90 mm/compaction.c:2678
 proc_sys_call_handler+0x3dd/0x530 fs/proc/proc_sysctl.c:591
 proc_sys_write+0x1e/0x30 fs/proc/proc_sysctl.c:617
 call_write_iter include/linux/fs.h:1977 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x6f9/0x7e0 fs/read_write.c:605
 ksys_write+0xce/0x180 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:667
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88823fff9298 of 8 bytes by task 26068 on cpu 1:
 update_cached_migrate mm/compaction.c:436 [inline]
 isolate_migratepages_block+0x19ac/0x1c90 mm/compaction.c:1122
 isolate_migratepages mm/compaction.c:1892 [inline]
 compact_zone+0x1597/0x1e60 mm/compaction.c:2342
 compact_node+0x128/0x1e0 mm/compaction.c:2641
 compact_nodes mm/compaction.c:2657 [inline]
 sysctl_compaction_handler+0x47/0x90 mm/compaction.c:2678
 proc_sys_call_handler+0x3dd/0x530 fs/proc/proc_sysctl.c:591
 proc_sys_write+0x1e/0x30 fs/proc/proc_sysctl.c:617
 call_write_iter include/linux/fs.h:1977 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x6f9/0x7e0 fs/read_write.c:605
 ksys_write+0xce/0x180 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:667
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 26068 Comm: syz-executor.5 Tainted: G        W         5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (160):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/04/14 15:15	upstream	50987bec	3134b37f	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/14 05:54	upstream	eebe426d	a184b83e	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/13 02:43	upstream	89698bec	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/12 11:48	upstream	d434405a	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/11 19:36	upstream	7d900724	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/10 00:43	upstream	4e04e751	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/08 21:47	upstream	3fb4f979	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/08 10:18	upstream	454859c5	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/07 19:13	upstream	3a229812	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/07 01:34	upstream	2d743660	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/06 18:04	upstream	0a50438c	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/05 01:23	upstream	e49d033b	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/04 13:44	upstream	2023a53b	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/04/02 00:14	upstream	ffd9fb54	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/31 07:02	upstream	5e46d1b7	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/30 18:03	upstream	2bb25b3a	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/29 21:04	upstream	1e43c377	6a81331a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/28 20:54	upstream	36a14638	a8529b82	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/27 00:42	upstream	0f4498ce	a8529b82	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/25 22:27	upstream	00232240	6a383ecf	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/25 16:53	upstream	e1381380	6a383ecf	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/24 22:29	upstream	4ee998b0	607e3baf	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/24 17:06	upstream	7acac4b3	607e3baf	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/23 18:08	upstream	84196390	e613994b	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/22 18:20	upstream	0d02ec6b	8092f30d	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/22 03:47	upstream	5ee96fa9	bea32f74	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/22 00:47	upstream	5ee96fa9	4c9a64da	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/20 21:39	upstream	812da4d3	17810eae	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/19 22:00	upstream	8b12a62a	3d01c4de	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/19 12:13	upstream	8b12a62a	2af9d324	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/18 20:39	upstream	bf152b0b	380dcc3e	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/18 01:06	upstream	6417f031	fdb2bb2c	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/15 16:02	upstream	1e28eed1	fdb2bb2c	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/15 12:45	upstream	1e28eed1	cc1cff8f	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/14 22:15	upstream	75013c6c	cc1cff8f	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/14 08:00	upstream	88fe4924	4a003785	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/13 01:10	upstream	f296bfd5	429d8a6b	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/11 04:38	upstream	a74e6a01	c2ca1f2a	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/10 19:17	upstream	05a59d79	764067f3	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/09 16:43	upstream	144c79ef	26967e35	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/07 22:16	upstream	144c79ef	09fbf400	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/07 21:00	upstream	a38fd874	09fbf400	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/07 08:33	upstream	a38fd874	c599ed12	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/05 21:57	upstream	280d542f	4a024a9b	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/04 06:25	upstream	f69d02e3	d7e4e604	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/03/03 20:15	upstream	f69d02e3	06ed56cd	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/02/24 07:15	upstream	c03c21ba	fcc6d71b	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/02/23 16:40	upstream	3b9cdafb	fcc6d71b	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/02/23 09:14	upstream	b12b4724	fcc6d71b	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/02/22 14:41	upstream	31caf8b2	c26fb06b	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/02/22 10:01	upstream	31caf8b2	a659b3f1	.config	log	report	info	KCSAN: data-race in isolate_migratepages_block / isolate_migratepages_block
ci2-upstream-kcsan-gce	2021/01/17 14:04	upstream	0da0a8a0	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/07 09:01	upstream	0477e928	f80ce148	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/02 05:28	upstream	509a1542	c42a35e9	.config	log	report	info