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: 235d, last: 4d18h

Sample crash report:

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

write to 0xffff888105e9b810 of 8 bytes by task 330 on cpu 1:
 move_expired_inodes+0x1ca/0x4c0 fs/fs-writeback.c:1257
 queue_io+0xe1/0x280 fs/fs-writeback.c:1304
 wb_writeback+0x265/0x700 fs/fs-writeback.c:1903
 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 0xffff888105e9b810 of 8 bytes by task 7116 on cpu 0:
 __mark_inode_dirty+0xda/0x6c0 fs/fs-writeback.c:2295
 mark_inode_dirty include/linux/fs.h:2267 [inline]
 dquot_alloc_space include/linux/quotaops.h:317 [inline]
 dquot_alloc_block include/linux/quotaops.h:334 [inline]
 ext4_mb_new_blocks+0x113b/0x1f60 fs/ext4/mballoc.c:4944
 ext4_ext_map_blocks+0x1569/0x1f00 fs/ext4/extents.c:4238
 ext4_map_blocks+0x70d/0xef0 fs/ext4/inode.c:638
 _ext4_get_block+0xf6/0x290 fs/ext4/inode.c:794
 ext4_get_block_unwritten+0x26/0x30 fs/ext4/inode.c:825
 __block_write_begin_int+0x4a2/0x1060 fs/buffer.c:2011
 __block_write_begin+0x2b/0x40 fs/buffer.c:2061
 ext4_write_begin+0x41b/0xcc0 fs/ext4/ext4_jbd2.h:498
 ext4_da_write_begin+0x20e/0x820 fs/ext4/inode.c:2962
 generic_perform_write+0x196/0x3a0 mm/filemap.c:3575
 ext4_buffered_write_iter+0x2f2/0x3f0 fs/ext4/file.c:269
 ext4_file_write_iter+0x2e7/0x11d0 fs/ext4/file.c:502
 call_write_iter include/linux/fs.h:1977 [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_64+0x34/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7116 Comm: syz-executor.1 Tainted: G        W         5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
syz-executor.1 (7116) used greatest stack depth: 10000 bytes left

Crashes (61):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/04/16 13:17	upstream	7e25f40e	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	a5e13c6d	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	812da4d3	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	1e28eed1	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	144c79ef	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	825b5991	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	964d069f	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	1e2a199f	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	e609571b	0cdd6185	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/12 00:22	upstream	a0d54b4f	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/11 10:22	upstream	7c53f6b6	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/10 01:58	upstream	2ff90100	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/04 20:48	upstream	36bbbd0e	2a28ff1f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/30 13:58	upstream	139711f0	ecb8c012	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/29 05:45	upstream	dea8dcf2	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/29 03:58	upstream	dea8dcf2	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/29 00:43	upstream	c76e02c5	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/28 21:10	upstream	c76e02c5	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/26 12:58	upstream	40f78232	821e0b09	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/20 20:15	upstream	6a447b0e	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/16 19:54	upstream	5e60366d	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/15 22:27	upstream	d635a69d	f213e07e	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/12 19:32	upstream	7b1b868e	bca53db9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/11 16:34	upstream	33dc9614	ba24ffcd	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/07 23:52	upstream	cd796ed3	51a9082e	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/05 10:34	upstream	b3298500	0ef84591	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/27 01:26	upstream	4df91062	5018c946	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/26 05:23	upstream	fa02fcd9	2f1cec62	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/25 05:37	upstream	127c501a	1a1f4bd8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/24 17:41	upstream	d5beb314	e34b696c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/19 20:56	upstream	131ad0b6	0767f13f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/13 02:02	upstream	af5043c8	16fca0c8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/09 08:52	upstream	f8394f23	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/07 01:06	upstream	bf3e7628	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/21 14:57	upstream	c4d6fe73	99c64d5c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/16 11:40	upstream	9ff9b0d3	6e262c73	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/15 11:00	upstream	3e4fb434	63869021	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/11 00:19	upstream	da690031	4a77ae0b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/09 09:16	upstream	583090b1	fa79ed2a	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/08 20:48	upstream	3d006ee4	92390980	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/03 17:05	upstream	d3d45f82	1a3f9408	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/03 03:59	upstream	d3d45f82	2653fa43	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/29 14:44	upstream	fb0155a0	5abc3f1a	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/28 23:12	upstream	fb0155a0	1b88c6d5	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/27 00:07	upstream	eeddbe68	5dd8aee8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/23 10:01	upstream	805c6d3c	287cd75a	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/19 11:57	upstream	eb5f95f1	53ce8104	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/18 18:02	upstream	10b82d51	38962c8b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/18 16:41	upstream	10b82d51	38962c8b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/18 09:05	upstream	10b82d51	38962c8b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/17 12:14	upstream	5925fa68	8247808b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/16 00:18	upstream	fc4f28bb	18d7d030	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/15 15:50	upstream	fc4f28bb	9e681632	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/14 03:01	upstream	84b13499	2d3cdd63	.config	log	report
ci2-upstream-kcsan-gce	2020/09/11 20:48	upstream	e8878ab8	adfb8b4e	.config	log	report
ci2-upstream-kcsan-gce	2020/09/11 00:41	upstream	581cb3a2	ac7ca78e	.config	log	report
ci2-upstream-kcsan-gce	2020/09/08 19:41	upstream	6f6a73c8	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/09/07 00:33	upstream	a8205e31	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/09/01 22:23	upstream	b765a32a	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/08/29 02:05	upstream	96d454cd	d5a3ae1f	.config	log	report