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: 523d, last: 3d00h

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	551d	759d	0/22	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 0xffff8881385982b0 of 8 bytes by task 5570 on cpu 1:
 __mark_inode_dirty+0x1bc/0x6c0 fs/fs-writeback.c:2434
 mark_inode_dirty include/linux/fs.h:2451 [inline]
 dquot_alloc_space include/linux/quotaops.h:317 [inline]
 dquot_alloc_block include/linux/quotaops.h:334 [inline]
 ext4_mb_new_blocks+0x1135/0x1ee0 fs/ext4/mballoc.c:5548
 ext4_ext_map_blocks+0x1658/0x2120 fs/ext4/extents.c:4285
 ext4_map_blocks+0x71e/0xf00 fs/ext4/inode.c:637
 ext4_alloc_file_blocks+0x281/0x730 fs/ext4/extents.c:4472
 ext4_fallocate+0x2a7/0x540 fs/ext4/extents.c:4753
 vfs_fallocate+0x486/0x720 fs/open.c:307
 ksys_fallocate fs/open.c:330 [inline]
 __do_sys_fallocate fs/open.c:338 [inline]
 __se_sys_fallocate fs/open.c:336 [inline]
 __x64_sys_fallocate+0x75/0xc0 fs/open.c:336
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881385982b0 of 8 bytes by task 2529 on cpu 0:
 __writeback_single_inode+0x46/0x4d0 fs/fs-writeback.c:1612
 writeback_sb_inodes+0x677/0xdf0 fs/fs-writeback.c:1881
 wb_writeback+0x26b/0x650 fs/fs-writeback.c:2054
 wb_do_writeback+0x101/0x560 fs/fs-writeback.c:2197
 wb_workfn+0xc8/0x440 fs/fs-writeback.c:2238
 process_one_work+0x3fc/0x980 kernel/workqueue.c:2298
 worker_thread+0x616/0xa70 kernel/workqueue.c:2445
 kthread+0x2c7/0x2e0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

value changed: 0x0000000000020081 -> 0x0000000000020087

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2529 Comm: kworker/u4:14 Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
==================================================================

Crashes (181):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/11/27 03:49	upstream	c5c17547b778	63eeac02	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/22 15:24	upstream	136057256686	545ab074	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/12 14:32	upstream	5833291ab6de	75b04091	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/12 03:01	upstream	ca2ef2d9f2aa	75b04091	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/09 21:10	upstream	d2f38a3c6507	59bcaf9a	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/09 00:35	upstream	e851dfae4371	8ab17e57	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/07 11:14	upstream	b5013d084e03	4c1be0be	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/06 03:40	upstream	fe91c4725aee	4c1be0be	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/04 03:47	upstream	ce840177930f	4c1be0be	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/11/02 01:55	upstream	e66435936756	098b5d53	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/31 03:00	upstream	119c85055d86	098b5d53	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/30 10:22	upstream	a379fbbcb88b	098b5d53	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/28 16:58	upstream	1fc596a56b33	be531bb4	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/27 15:14	upstream	d25f27432f80	be531bb4	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/27 05:00	upstream	d25f27432f80	d50eb50a	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/23 08:07	upstream	9c0c4d24ac00	282f03fb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/23 05:27	upstream	64222515138e	282f03fb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/22 15:01	upstream	64222515138e	55f90bc6	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/22 02:59	upstream	2f111a6fd5b5	55f90bc6	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/16 06:14	upstream	8fe31e0995f0	0c5d9412	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/12 01:01	upstream	fa5878760579	838e7e2c	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/11 13:00	upstream	64570fbc14f8	838e7e2c	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/07 16:23	upstream	5af4055fa813	efe0f24d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/06 00:54	upstream	60a9483534ed	0a63fd36	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/02 19:06	upstream	ab2a7a35c4e7	db0f5787	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/10/01 21:19	upstream	24f67d82c43c	cc80db95	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/26 10:04	upstream	a3b397b4fffb	8cac236e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/25 08:34	upstream	7d42e9818258	8cac236e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/20 11:45	upstream	e4e737bb5c17	3d9c9a2a	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/18 05:58	upstream	4357f03d6611	70b76c1d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/16 08:20	upstream	ff1ffd71d5f0	07e953c1	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/15 20:46	upstream	80be5998ad63	07e953c1	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/14 05:34	upstream	316346243be6	58d09404	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/13 09:09	upstream	6880fa6c5660	3ce60af8	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/10 02:42	upstream	bf9f243f23e6	e2776ee4	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/09 15:39	upstream	a3fa7a101dcf	e2776ee4	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/07 02:22	upstream	4b93c544e90e	6ca60148	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/03 11:52	upstream	a9c9a6f741cd	d236a457	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/27 06:02	upstream	1a6d80ff2419	b318694d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/23 17:01	upstream	e22ce8eb631b	b599f2fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/22 21:31	upstream	1bdc3d5be7e1	b599f2fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/22 19:53	upstream	9ff50bf2f2ff	b599f2fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/02 22:07	upstream	3516bd729358	79264ae3	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/13 22:55	upstream	6ad4bf6ea160	fc7735a2	.config	log	report	info
ci2-upstream-kcsan-gce	2020/06/24 10:34	upstream	3e08a95294a4	41694dbf	.config	log	report