KCSAN: data-race in __mark_inode_dirty / __mark_inode

KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty (3)
Status: moderation: reported on 2020/12/07 11:24
Reported-by: syzbot+1580cfa2f85484a8f5b7@syzkaller.appspotmail.com
First crash: 516d, last: 12d

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty				3	758d	768d	0/22	closed as invalid on 2019/11/19 13:24
upstream	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty (2)				19	530d	733d	0/22	closed as invalid on 2020/06/18 14:24

Sample crash report:

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

write to 0xffff88813c12b4c0 of 8 bytes by task 2656 on cpu 1:
 __mark_inode_dirty+0x1bc/0x6c0 fs/fs-writeback.c:2434
 fat_update_time+0x125/0x140 fs/fat/misc.c:351
 inode_update_time fs/inode.c:1796 [inline]
 touch_atime+0x16e/0x2e0 fs/inode.c:1869
 file_accessed include/linux/fs.h:2505 [inline]
 filemap_read+0x1648/0x16d0 mm/filemap.c:2714
 generic_file_read_iter+0x72/0x2a0 mm/filemap.c:2792
 call_read_iter include/linux/fs.h:2156 [inline]
 generic_file_splice_read+0x24f/0x330 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x675/0xc40 fs/read_write.c:1245
 __do_sys_sendfile64 fs/read_write.c:1310 [inline]
 __se_sys_sendfile64 fs/read_write.c:1296 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1296
 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 0xffff88813c12b4c0 of 8 bytes by task 2661 on cpu 0:
 __mark_inode_dirty+0xd7/0x6c0 fs/fs-writeback.c:2420
 fat_update_time+0x125/0x140 fs/fat/misc.c:351
 inode_update_time fs/inode.c:1796 [inline]
 touch_atime+0x16e/0x2e0 fs/inode.c:1869
 file_accessed include/linux/fs.h:2505 [inline]
 filemap_read+0x1648/0x16d0 mm/filemap.c:2714
 generic_file_read_iter+0x72/0x2a0 mm/filemap.c:2792
 call_read_iter include/linux/fs.h:2156 [inline]
 generic_file_splice_read+0x24f/0x330 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2aa/0x650 fs/splice.c:870
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x675/0xc40 fs/read_write.c:1245
 __do_sys_sendfile64 fs/read_write.c:1310 [inline]
 __se_sys_sendfile64 fs/read_write.c:1296 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1296
 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

value changed: 0x0000000000000000 -> 0x0000000000000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2661 Comm: syz-executor.5 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (171):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/11/17 21:06	upstream	ee1703cda8dc	cafff8b6	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/11/16 21:40	upstream	8ab774587903	600426bd	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/11/14 04:17	upstream	a9b9669d9822	75b04091	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/11/10 18:49	upstream	89d714ab6043	75b04091	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/10/13 20:45	upstream	348949d9a444	5462d470	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/10/12 16:19	upstream	fa5878760579	08362356	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/10/09 16:37	upstream	5d6ab0bb408f	838e7e2c	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/10/08 07:04	upstream	1da38549dd64	efe0f24d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/10/04 11:11	upstream	9e1ff307c779	ce697b49	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/10/02 10:30	upstream	53d5fc89d66a	db0f5787	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/30 13:14	upstream	02d5e016800d	0f01403d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/29 06:14	upstream	a4e6f95a891a	d82cb927	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/22 20:30	upstream	cf1d2c3e7e2f	8cac236e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/22 15:05	upstream	92477dd1faa6	8cac236e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/20 21:21	upstream	e8f71f89236e	af796c18	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/17 08:01	upstream	bdb575f87217	5b989942	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/16 14:07	upstream	ff1ffd71d5f0	aae492f2	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/15 14:04	upstream	3ca706c189db	07e953c1	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/11 18:50	upstream	926de8c4326c	3ce60af8	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/07 19:40	upstream	0bcfe68b8767	6ca60148	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/09/01 18:19	upstream	835d31d319d9	7eb7e152	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/24 20:33	upstream	6e764bcd1cf7	b599f2fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/20 03:11	upstream	f87d64319e6f	b599f2fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/19 23:52	upstream	f87d64319e6f	e2da378b	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/19 15:12	upstream	d6d09a694205	e2da378b	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/16 15:25	upstream	7c60610d4767	6652437d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/14 02:40	upstream	dfa377c35d70	2489ab88	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/12 00:48	upstream	761c6d7ec820	6972b106	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/10 01:22	upstream	9a73fa375d58	6972b106	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/08/06 05:23	upstream	902e7f373fff	2f537099	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/27 16:15	upstream	ff1176468d36	17d6ab15	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/23 14:06	upstream	8baef6386baa	bc5f1d88	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/19 11:17	upstream	2734d6c1b1a0	e6a17580	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/16 22:50	upstream	0d18c12b288a	f115ae98	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/16 13:05	upstream	d936eb238744	f115ae98	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/15 00:21	upstream	8096acd7442e	b9a2f64e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/09 08:47	upstream	3dbdb38e2869	281e815f	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/08 06:57	upstream	3dbdb38e2869	1aade754	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/07 19:18	upstream	3dbdb38e2869	95793bce	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/07 07:42	upstream	3dbdb38e2869	4846d5c1	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/02 11:57	upstream	3dbdb38e2869	658ebc66	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/01 09:00	upstream	dbe69e433722	658ebc66	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/01/16 21:24	upstream	54c6247d06f1	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/04 21:21	upstream	e87297fa080a	20366b87	.config	log	report	info
ci2-upstream-kcsan-gce	2020/07/01 11:19	upstream	7c30b859a947	090d8f7b	.config	log	report