KCSAN: data-race in __mark_inode_dirty / writeback_sb

KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes (2)
Status: moderation: reported on 2020/11/02 12:43
Reported-by: syzbot+d98998b6cacef9fecc92@syzkaller.appspotmail.com
First crash: 305d, last: 5d15h

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes				38	317d	537d	0/22	closed as invalid on 2020/06/18 14:24

Sample crash report:

==================================================================
BUG: KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes

write to 0xffff8881059d07d0 of 8 bytes by task 1764 on cpu 0:
 writeback_sb_inodes+0x3cc/0xf10 fs/fs-writeback.c:1721
 wb_writeback+0x28e/0x700 fs/fs-writeback.c:1905
 wb_do_writeback+0x101/0x510 fs/fs-writeback.c:2050
 wb_workfn+0xc8/0x520 fs/fs-writeback.c:2091
 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2275
 worker_thread+0x636/0xae0 kernel/workqueue.c:2421
 kthread+0x1d0/0x1f0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff8881059d07d0 of 8 bytes by task 7482 on cpu 1:
 __mark_inode_dirty+0xda/0x6c0 fs/fs-writeback.c:2295
 mark_inode_dirty_sync include/linux/fs.h:2272 [inline]
 dquot_free_space include/linux/quotaops.h:382 [inline]
 dquot_free_block include/linux/quotaops.h:392 [inline]
 ext4_mb_new_blocks+0x1696/0x1f60 fs/ext4/mballoc.c:5030
 ext4_ext_map_blocks+0x1569/0x1f00 fs/ext4/extents.c:4238
 ext4_map_blocks+0x70d/0xef0 fs/ext4/inode.c:638
 ext4_alloc_file_blocks+0x271/0x720 fs/ext4/extents.c:4425
 ext4_zero_range+0x309/0xa40 fs/ext4/extents.c:4537
 ext4_fallocate+0x226/0x4d0 fs/ext4/extents.c:4674
 vfs_fallocate+0x463/0x660 fs/open.c:311
 ksys_fallocate fs/open.c:334 [inline]
 __do_sys_fallocate fs/open.c:342 [inline]
 __se_sys_fallocate fs/open.c:340 [inline]
 __x64_sys_fallocate+0x75/0xc0 fs/open.c:340
 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7482 Comm: syz-executor.4 Not tainted 5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (64):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/04/15 16:42	upstream	7f75285c	c59079a6	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes
ci2-upstream-kcsan-gce	2021/04/11 19:47	upstream	7d900724	6a81331a	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes
ci2-upstream-kcsan-gce	2021/03/12 10:20	upstream	f78d76e7	429d8a6b	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes
ci2-upstream-kcsan-gce	2021/02/15 02:26	upstream	f40ddce8	98682e5e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes
ci2-upstream-kcsan-gce	2021/02/14 01:09	upstream	ac30d8ce	98682e5e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes
ci2-upstream-kcsan-gce	2021/02/10 22:14	upstream	291009f6	a52ee10a	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_sb_inodes
ci2-upstream-kcsan-gce	2021/01/09 02:17	upstream	6279d812	c104d4a3	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/05 21:18	upstream	6207214a	a0234d98	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/17 22:37	upstream	d64c6f96	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/17 10:04	upstream	accefff5	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/13 09:14	upstream	6bff9bb8	bca53db9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/08 08:55	upstream	cd796ed3	9af51e31	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/14 16:28	upstream	f01c30de	1bf9a662	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/08 20:27	upstream	9dbc1c03	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/29 18:16	upstream	23859ae4	a0c7169a	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/14 11:00	upstream	b5fc7a89	fc7735a2	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/11 21:59	upstream	3dd0130f	4a77ae0b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/10 22:58	upstream	6f2f486d	4a77ae0b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/01 21:26	upstream	fcadab74	9602ddf4	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/01 11:31	upstream	60e72093	4103fce0	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/28 02:39	upstream	a1b8638b	5dd8aee8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/24 17:45	upstream	171d4ff7	54289b08	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/20 19:30	upstream	bdcf11de	9564d2e9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/19 19:59	upstream	eb5f95f1	53ce8104	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/19 13:43	upstream	eb5f95f1	53ce8104	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/19 00:07	upstream	92ab97ad	53ce8104	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/17 03:23	upstream	5925fa68	8247808b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/16 12:38	upstream	fc4f28bb	18d7d030	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/15 12:14	upstream	fc4f28bb	9e681632	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/09 21:37	upstream	34d4ddd3	ac7ca78e	.config	log	report
ci2-upstream-kcsan-gce	2020/08/28 18:25	upstream	15bc20c6	d5a3ae1f	.config	log	report
ci2-upstream-kcsan-gce	2020/08/24 00:46	upstream	cb957121	cef5ae68	.config	log	report
ci2-upstream-kcsan-gce	2020/08/20 06:26	upstream	7eac66d0	ed282a3a	.config	log	report
ci2-upstream-kcsan-gce	2020/08/16 19:48	upstream	2cc3c4b3	5ce13532	.config	log	report
ci2-upstream-kcsan-gce	2020/08/15 06:56	upstream	c9c9735c	5ce13532	.config	log	report
ci2-upstream-kcsan-gce	2020/08/14 02:01	upstream	990f2273	54ce1ed6	.config	log	report
ci2-upstream-kcsan-gce	2020/08/13 01:03	upstream	fb893de3	bc15f7db	.config	log	report
ci2-upstream-kcsan-gce	2020/08/12 14:18	upstream	fb893de3	0d7bd2e0	.config	log	report
ci2-upstream-kcsan-gce	2020/08/11 23:43	upstream	bb5baaa9	bb3e5fe6	.config	log	report
ci2-upstream-kcsan-gce	2020/08/07 02:22	upstream	d6efb3ac	cb436c69	.config	log	report
ci2-upstream-kcsan-gce	2020/07/30 09:10	upstream	83bdc727	233283a1	.config	log	report
ci2-upstream-kcsan-gce	2020/07/29 06:50	upstream	6ba1b005	19a8de55	.config	log	report
ci2-upstream-kcsan-gce	2020/07/26 20:48	upstream	1ada9010	51265195	.config	log	report
ci2-upstream-kcsan-gce	2020/07/26 11:44	upstream	04300d66	51265195	.config	log	report
ci2-upstream-kcsan-gce	2020/07/22 22:53	upstream	8c26c87b	128cd85f	.config	log	report
ci2-upstream-kcsan-gce	2020/07/21 01:15	upstream	4fa640dc	8caeeeb7	.config	log	report
ci2-upstream-kcsan-gce	2020/07/18 05:06	upstream	6a70f89c	9c812472	.config	log	report
ci2-upstream-kcsan-gce	2020/07/16 11:55	upstream	f8456690	b090c643	.config	log	report
ci2-upstream-kcsan-gce	2020/07/10 23:06	upstream	a581387e	18d18b59	.config	log	report
ci2-upstream-kcsan-gce	2020/07/09 09:38	upstream	0bddd227	bc238812	.config	log	report
ci2-upstream-kcsan-gce	2020/07/07 22:46	upstream	aa27b32b	08fc4ef1	.config	log	report
ci2-upstream-kcsan-gce	2020/07/05 13:40	upstream	35e884f8	22f87567	.config	log	report
ci2-upstream-kcsan-gce	2020/07/02 07:52	upstream	cd77006e	bed10395	.config	log	report
ci2-upstream-kcsan-gce	2020/07/01 19:15	upstream	7c30b859	39acb39d	.config	log	report
ci2-upstream-kcsan-gce	2020/07/01 09:36	upstream	7c30b859	c0383ebe	.config	log	report
ci2-upstream-kcsan-gce	2020/07/01 03:53	upstream	7c30b859	c0383ebe	.config	log	report
ci2-upstream-kcsan-gce	2020/06/30 03:51	upstream	7c30b859	917afeaa	.config	log	report
ci2-upstream-kcsan-gce	2020/06/26 20:38	upstream	1590a2e1	349959fb	.config	log	report
ci2-upstream-kcsan-gce	2020/06/26 15:25	upstream	4a21185c	9506ea6d	.config	log	report
ci2-upstream-kcsan-gce	2020/06/26 11:56	upstream	4a21185c	b202c7a8	.config	log	report
ci2-upstream-kcsan-gce	2020/06/26 01:26	upstream	908f7d12	aea82c00	.config	log	report
ci2-upstream-kcsan-gce	2020/06/24 20:30	upstream	26e122e9	9d60b18e	.config	log	report
ci2-upstream-kcsan-gce	2020/06/21 15:34	upstream	64677779	4f2acff9	.config	log	report
ci2-upstream-kcsan-gce	2020/06/19 22:48	upstream	672f9255	123cf502	.config	log	report