KCSAN: data-race in __mark_inode_dirty / __writeback_single

KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode (2)
Status: moderation: reported on 2020/10/14 12:01
Reported-by: syzbot+dd7eafdc93343dca0f7d@syzkaller.appspotmail.com
First crash: 250d, last: 8d10h

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode				43	278d	486d	0/21	closed as invalid on 2020/06/18 14:24

Sample crash report:

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

write to 0xffff88810daf2738 of 8 bytes by task 8 on cpu 0:
 __writeback_single_inode+0x213/0x500 fs/fs-writeback.c:1496
 writeback_sb_inodes+0x6a7/0xff0 fs/fs-writeback.c:1723
 wb_writeback+0x27d/0x660 fs/fs-writeback.c:1896
 wb_do_writeback+0x101/0x5d0 fs/fs-writeback.c:2041
 wb_workfn+0xc8/0x430 fs/fs-writeback.c:2082
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x616/0xa70 kernel/workqueue.c:2421
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff88810daf2738 of 8 bytes by task 16682 on cpu 1:
 __mark_inode_dirty+0xb4/0x6b0 fs/fs-writeback.c:2276
 mark_buffer_dirty+0x143/0x230 fs/buffer.c:1141
 __block_commit_write fs/buffer.c:2084 [inline]
 block_write_end+0x13d/0x230 fs/buffer.c:2162
 generic_write_end+0x5c/0x240 fs/buffer.c:2176
 ext4_da_write_end+0x59b/0x760 fs/ext4/inode.c:3111
 generic_perform_write+0x23e/0x3a0 mm/filemap.c:3423
 ext4_buffered_write_iter+0x2e5/0x3e0 fs/ext4/file.c:270
 ext4_file_write_iter+0x47a/0x1060 fs/ext4/file.c:503
 call_write_iter include/linux/fs.h:1901 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x6f0/0x7e0 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: 16682 Comm: syz-executor.1 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (86):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/02/21 19:51	upstream	55f62bc8	a659b3f1	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/17 08:00	upstream	f40ddce8	052f8d9f	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/14 13:53	upstream	358fecee	98682e5e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/11 18:42	upstream	291009f6	a5f86b15	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/10 09:39	upstream	e0756cfc	9c8b8541	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/08 14:12	upstream	92bf2261	2ce644fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/07 22:30	upstream	b75dba7f	2ce644fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/03 00:22	upstream	3aaf0a27	624dad51	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/01 21:34	upstream	88bb507a	e6b95f32	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/29 19:21	upstream	bec4c296	fc9fd31e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/24 01:05	upstream	e1ae4b0b	52e37319	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/23 10:03	upstream	fe75a218	52e37319	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/02 22:07	upstream	3516bd72	79264ae3	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/14 21:46	upstream	fab0fca1	97183ed7	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/11 00:02	upstream	9fca90cf	f900b48c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/10 16:18	upstream	a2f5ea9e	2a55c22b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/02 23:07	upstream	3bb61aa6	eff43e99	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/02 01:02	upstream	509a1542	c42a35e9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/29 01:30	upstream	67f34fa8	a0092f9d	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/28 12:40	upstream	c84e1efa	3c7136c0	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/28 03:23	upstream	c84e1efa	486f93ef	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/26 19:17	upstream	4df91062	2f1cec62	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/26 11:52	upstream	fa02fcd9	2f1cec62	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/21 10:59	upstream	27bba9c5	c7ec2d19	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/20 16:52	upstream	4d02da97	68068804	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/18 22:54	upstream	c2e7554e	0767f13f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/15 20:51	upstream	0062442e	1bf9a662	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/15 05:52	upstream	e28c0d7c	1bf9a662	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/03 09:05	upstream	b7cbaf59	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/31 00:01	upstream	f5d80856	18e33098	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/21 04:33	upstream	c4d6fe73	ff4a3345	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/20 13:24	upstream	270315b8	ff4a3345	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/19 23:56	upstream	bbe85027	ff4a3345	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/15 17:46	upstream	726eb70e	63869021	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/13 22:55	upstream	6ad4bf6e	fc7735a2	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/13 09:34	upstream	865c50e1	bd69ee0d	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/10 10:59	upstream	6f2f486d	b74c49a6	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/05 13:33	upstream	549738f1	1880b4a9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/04 09:24	upstream	22fbc037	5ef9c291	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/04 01:18	upstream	22fbc037	1a3f9408	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/30 22:04	upstream	60e72093	a9767fb2	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/22 17:31	upstream	eff48dde	3e8f6c27	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/22 11:15	upstream	98477740	3e8f6c27	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/17 04:49	upstream	5925fa68	8247808b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/17 01:16	upstream	5925fa68	77507d02	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/16 17:28	upstream	fc4f28bb	77507d02	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/15 13:55	upstream	fc4f28bb	9e681632	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/14 08:18	upstream	84b13499	2d3cdd63	.config	log	report
ci2-upstream-kcsan-gce	2020/09/14 00:27	upstream	84b13499	2d3cdd63	.config	log	report
ci2-upstream-kcsan-gce	2020/07/08 16:45	upstream	dcde237b	5962a2dc	.config	log	report
ci2-upstream-kcsan-gce	2020/07/07 20:02	upstream	bfe91da2	08fc4ef1	.config	log	report
ci2-upstream-kcsan-gce	2020/07/05 01:28	upstream	35e884f8	24d7f505	.config	log	report
ci2-upstream-kcsan-gce	2020/07/02 07:59	upstream	cd77006e	bed10395	.config	log	report
ci2-upstream-kcsan-gce	2020/06/30 06:25	upstream	7c30b859	917afeaa	.config	log	report
ci2-upstream-kcsan-gce	2020/06/29 23:11	upstream	7c30b859	917afeaa	.config	log	report
ci2-upstream-kcsan-gce	2020/06/29 05:06	upstream	9ebcfadb	a2cdad9d	.config	log	report
ci2-upstream-kcsan-gce	2020/06/28 18:59	upstream	719fdd32	a2cdad9d	.config	log	report
ci2-upstream-kcsan-gce	2020/06/28 10:32	upstream	719fdd32	a2cdad9d	.config	log	report
ci2-upstream-kcsan-gce	2020/06/28 01:39	upstream	916a3b0f	a2cdad9d	.config	log	report
ci2-upstream-kcsan-gce	2020/06/27 22:16	upstream	6116dea8	a2cdad9d	.config	log	report
ci2-upstream-kcsan-gce	2020/06/26 04:01	upstream	4a21185c	aea82c00	.config	log	report
ci2-upstream-kcsan-gce	2020/06/25 23:06	upstream	908f7d12	aea82c00	.config	log	report
ci2-upstream-kcsan-gce	2020/06/25 19:51	upstream	908f7d12	adb7d9e6	.config	log	report
ci2-upstream-kcsan-gce	2020/06/24 10:34	upstream	3e08a952	41694dbf	.config	log	report