KCSAN: data-race in __mark_inode_dirty / move_expired

KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
Status: moderation: reported on 2020/12/07 11:25
Reported-by: syzbot+523350e00be12594ac45@syzkaller.appspotmail.com
First crash: 333d, last: 9d17h

Sample crash report:

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

write to 0xffff8881017a4888 of 8 bytes by task 1825 on cpu 0:
 move_expired_inodes+0x1ca/0x4c0 fs/fs-writeback.c:1400
 queue_io+0xe1/0x270 fs/fs-writeback.c:1447
 wb_writeback+0x265/0x700 fs/fs-writeback.c:2046
 wb_do_writeback+0x101/0x510 fs/fs-writeback.c:2193
 wb_workfn+0xc8/0x520 fs/fs-writeback.c:2234
 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2276
 worker_thread+0x636/0xae0 kernel/workqueue.c:2422
 kthread+0x262/0x280 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

read to 0xffff8881017a4888 of 8 bytes by task 13850 on cpu 1:
 __mark_inode_dirty+0xda/0x680 fs/fs-writeback.c:2416
 mark_inode_dirty include/linux/fs.h:2403 [inline]
 generic_write_end+0x157/0x180 fs/buffer.c:2198
 ext4_da_write_end+0x59b/0x730 fs/ext4/inode.c:3110
 generic_perform_write+0x22a/0x3c0 mm/filemap.c:3667
 ext4_buffered_write_iter+0x2f2/0x3f0 fs/ext4/file.c:269
 ext4_file_write_iter+0x2e7/0x11d0 fs/ext4/file.c:519
 call_write_iter include/linux/fs.h:2114 [inline]
 do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740
 do_iter_write+0x112/0x4c0 fs/read_write.c:866
 vfs_iter_write+0x4c/0x70 fs/read_write.c:907
 iter_file_splice_write+0x40a/0x750 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0xf5/0x170 fs/splice.c:979
 do_sendfile+0x773/0xda0 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1325 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000007 -> 0x0000000000020087

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 13850 Comm: syz-executor.1 Not tainted 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (73):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/07/18 20:00	upstream	f0eb870a8422	f115ae98	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/07/18 00:51	upstream	1d67c8d993ba	f115ae98	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/06/29 20:16	upstream	c54b245d0118	a4fccb01	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/06/22 05:45	upstream	a96bfed64c89	aba2b2fb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/06/20 21:32	upstream	cba5e97280f5	aba2b2fb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/06/13 05:14	upstream	8ecfa36cd4db	1ba81399	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/06/08 08:04	upstream	614124bea77e	5c2fe346	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/06/07 11:17	upstream	614124bea77e	e59537be	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/06/05 05:14	upstream	16f0596fc1d7	500c2339	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/05/13 13:40	upstream	c06a2ba62fc4	ecb594cb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/05/06 11:56	upstream	8404c9fbc84b	06c27ff5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/04/21 20:56	upstream	16fc44d6387e	2bc8999a	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/04/16 13:17	upstream	7e25f40eab52	7e2b734b	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/03/29 11:31	upstream	a5e13c6df0e4	a8529b82	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/03/20 21:47	upstream	812da4d39463	17810eae	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/03/15 10:56	upstream	1e28eed17697	cc1cff8f	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/03/08 06:35	upstream	144c79ef3353	09fbf400	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/02/07 09:24	upstream	825b5991a46e	2ce644fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/02/07 02:57	upstream	964d069f93c4	0655e081	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/01/18 23:59	upstream	1e2a199f6ccd	63631df1	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / move_expired_inodes
ci2-upstream-kcsan-gce	2021/01/12 19:42	upstream	e609571b5ffa	0cdd6185	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/12 00:22	upstream	a0d54b4f5b21	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/11 10:22	upstream	7c53f6b671f4	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/10 01:58	upstream	2ff90100ace8	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/04 20:48	upstream	36bbbd0e234d	2a28ff1f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/30 13:58	upstream	139711f033f6	ecb8c012	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/29 05:45	upstream	dea8dcf2a9fa	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/29 03:58	upstream	dea8dcf2a9fa	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/29 00:43	upstream	c76e02c59e13	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/28 21:10	upstream	c76e02c59e13	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/26 12:58	upstream	40f78232f973	821e0b09	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/20 20:15	upstream	6a447b0e3151	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/16 19:54	upstream	5e60366d56c6	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/15 22:27	upstream	d635a69dd498	f213e07e	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/12 19:32	upstream	7b1b868e1d91	bca53db9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/11 16:34	upstream	33dc9614dc20	ba24ffcd	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/07 23:52	upstream	cd796ed33450	51a9082e	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/05 10:34	upstream	b3298500b23f	0ef84591	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/27 01:26	upstream	4df910620beb	5018c946	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/26 05:23	upstream	fa02fcd94b0c	2f1cec62	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/25 05:37	upstream	127c501a03d5	1a1f4bd8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/24 17:41	upstream	d5beb3140f91	e34b696c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/19 20:56	upstream	131ad0b6f529	0767f13f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/13 02:02	upstream	af5043c89a8e	16fca0c8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/09 08:52	upstream	f8394f232b1e	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/07 01:06	upstream	bf3e76289cd2	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/21 14:57	upstream	c4d6fe731176	99c64d5c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/16 11:40	upstream	9ff9b0d392ea	6e262c73	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/15 11:00	upstream	3e4fb4346c78	63869021	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/11 00:19	upstream	da690031a5d6	4a77ae0b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/09 09:16	upstream	583090b1b823	fa79ed2a	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/08 20:48	upstream	3d006ee42dde	92390980	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/03 17:05	upstream	d3d45f8220d6	1a3f9408	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/03 03:59	upstream	d3d45f8220d6	2653fa43	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/29 14:44	upstream	fb0155a09b02	5abc3f1a	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/28 23:12	upstream	fb0155a09b02	1b88c6d5	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/27 00:07	upstream	eeddbe6841cd	5dd8aee8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/23 10:01	upstream	805c6d3c1921	287cd75a	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/19 11:57	upstream	eb5f95f1593f	53ce8104	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/18 18:02	upstream	10b82d517648	38962c8b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/18 16:41	upstream	10b82d517648	38962c8b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/18 09:05	upstream	10b82d517648	38962c8b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/17 12:14	upstream	5925fa68fe82	8247808b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/16 00:18	upstream	fc4f28bb3daf	18d7d030	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/15 15:50	upstream	fc4f28bb3daf	9e681632	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/14 03:01	upstream	84b134997212	2d3cdd63	.config	log	report
ci2-upstream-kcsan-gce	2020/09/11 20:48	upstream	e8878ab82545	adfb8b4e	.config	log	report
ci2-upstream-kcsan-gce	2020/09/11 00:41	upstream	581cb3a26baf	ac7ca78e	.config	log	report
ci2-upstream-kcsan-gce	2020/09/08 19:41	upstream	6f6a73c8b715	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/09/07 00:33	upstream	a8205e310011	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/09/01 22:23	upstream	b765a32a2e91	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/08/29 02:05	upstream	96d454cd2c16	d5a3ae1f	.config	log	report