KCSAN: data-race in __mark_inode_dirty / writeback_single

KCSAN: data-race in __mark_inode_dirty / writeback_single_inode (3)
Status: moderation: reported on 2020/08/25 07:38
Reported-by: syzbot+fb608ef9b3cacb1fe58e@syzkaller.appspotmail.com
First crash: 366d, last: 21h18m

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode				1	589d	589d	0/22	closed as invalid on 2019/11/19 14:44
upstream	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode (2)				18	370d	533d	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 0xffff888131544160 of 8 bytes by task 7572 on cpu 1:
 writeback_single_inode+0x143/0x590 fs/fs-writeback.c:1577
 sync_inode fs/fs-writeback.c:2624 [inline]
 sync_inode_metadata+0x57/0x80 fs/fs-writeback.c:2644
 __generic_file_fsync+0xf5/0x140 fs/libfs.c:1090
 fat_file_fsync+0x48/0x100 fs/fat/file.c:190
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2982 [inline]
 generic_file_write_iter+0x103/0x130 mm/filemap.c:3825
 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_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888131544160 of 8 bytes by task 7590 on cpu 0:
 __mark_inode_dirty+0x408/0x6c0 fs/fs-writeback.c:2350
 fat_update_time+0x125/0x140 fs/fat/misc.c:348
 update_time fs/inode.c:1784 [inline]
 touch_atime+0x11c/0x240 fs/inode.c:1856
 file_accessed include/linux/fs.h:2456 [inline]
 filemap_read+0x11c9/0x1230 mm/filemap.c:2622
 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2701
 call_read_iter include/linux/fs.h:2108 [inline]
 generic_file_splice_read+0x22a/0x310 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+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+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000001 -> 0x0000000000000080

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7590 Comm: syz-executor.5 Tainted: G        W         5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (278):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/06/19 09:55	upstream	9ed13a17	aba2b2fb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/06/13 01:08	upstream	ad347abe	1ba81399	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/06/11 23:21	upstream	f21b807c	1ba81399	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/06/07 01:11	upstream	decad3e1	500c2339	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/06/03 20:08	upstream	f88cd3fb	0740de69	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/06/01 04:54	upstream	c2131f7e	032639db	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/31 10:05	upstream	8124c8a6	032639db	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/31 04:56	upstream	8124c8a6	325a8dab	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/28 20:25	upstream	5ff2756a	858ea628	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/28 09:16	upstream	97e5bf60	858ea628	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/27 17:03	upstream	d7c5303f	858ea628	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/24 12:59	upstream	c4681547	3c7fef33	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/22 11:50	upstream	45af60e7	3c7fef33	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/21 01:34	upstream	ba816d3c	3c7fef33	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/20 13:26	upstream	c3d0e3fd	c560a65d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/19 19:23	upstream	c3d0e3fd	a343ba6b	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/17 09:48	upstream	d07f6ca9	a2eb125d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/16 15:23	upstream	63d1cb53	f54a5c09	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/15 10:10	upstream	25a12987	93f844de	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/15 07:56	upstream	25a12987	8bdd5343	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/14 18:34	upstream	bd3c9cdb	8bdd5343	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/14 03:01	upstream	315d9931	8bdd5343	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/12 06:56	upstream	88b06399	86294427	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/10 13:58	upstream	6efb943b	ca873091	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/09 21:22	upstream	9819f682	bc5434be	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/08 10:27	upstream	dd860052	bc5434be	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/07 21:22	upstream	1ad77a05	bc5434be	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/07 08:47	upstream	e4866123	f6da8120	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/07 04:50	upstream	e4866123	06585184	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/06 16:16	upstream	8404c9fb	06585184	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/05 21:36	upstream	a79cdfba	06c27ff5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/05 03:32	upstream	d665ea6e	06c27ff5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/04 13:58	upstream	5e321ded	06c27ff5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/04 02:34	upstream	5e321ded	09efdd63	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/02 11:58	upstream	17ae69ab	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/05/01 23:40	upstream	10a3efd0	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/30 00:03	upstream	8ca5297e	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/28 21:57	upstream	68a32ba1	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/28 07:47	upstream	e359bce3	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/26 22:52	upstream	9f4ad9e4	8ee2dea6	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/26 09:40	upstream	9f4ad9e4	805b5003	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/25 22:55	upstream	d2d09fbe	2a82f1b3	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/24 18:13	upstream	2a1d7946	17f0b706	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/23 12:37	upstream	18a3c5f7	17f0b706	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/22 23:01	upstream	90c911ad	33c28d03	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/22 12:41	upstream	16fc44d6	33c28d03	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/21 18:48	upstream	16fc44d6	95777977	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/21 08:45	upstream	1fe5501b	95777977	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/04/20 08:24	upstream	7af08140	c0ced557	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/17 10:51	upstream	0da0a8a0	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/08/25 02:59	upstream	6a9dc5fd	344da168	.config	log	report
ci2-upstream-kcsan-gce	2020/08/21 07:24	upstream	da2968ff	1d75fe45	.config	log	report
ci2-upstream-kcsan-gce	2020/06/18 22:24	upstream	1b504402	3ea11d3f	.config	log	report