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: 456d, last: 3d21h

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	679d	679d	0/22	closed as invalid on 2019/11/19 14:44
upstream	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode (2)				18	460d	624d	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 0xffff8881348da160 of 8 bytes by task 24732 on cpu 1:
 writeback_single_inode+0x148/0x3e0 fs/fs-writeback.c:1726
 sync_inode_metadata+0x57/0x80 fs/fs-writeback.c:2748
 __generic_file_fsync+0xf5/0x140 fs/libfs.c:1099
 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:2955 [inline]
 generic_file_write_iter+0x103/0x130 mm/filemap.c:3933
 call_write_iter include/linux/fs.h:2163 [inline]
 do_iter_readv_writev+0x2de/0x380 fs/read_write.c:729
 do_iter_write+0x192/0x5c0 fs/read_write.c:855
 vfs_iter_write+0x4c/0x70 fs/read_write.c:896
 iter_file_splice_write+0x43a/0x790 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+0x106/0x190 fs/splice.c:979
 do_sendfile+0x63e/0xbb0 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1314 [inline]
 __se_sys_sendfile64 fs/read_write.c:1300 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1300
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881348da160 of 8 bytes by task 24719 on cpu 0:
 __mark_inode_dirty+0x3f7/0x6a0 fs/fs-writeback.c:2471
 fat_update_time+0x125/0x140 fs/fat/misc.c:351
 update_time fs/inode.c:1786 [inline]
 touch_atime+0x12f/0x250 fs/inode.c:1858
 file_accessed include/linux/fs.h:2504 [inline]
 filemap_read+0x11c8/0x1240 mm/filemap.c:2700
 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2779
 call_read_iter include/linux/fs.h:2157 [inline]
 generic_file_splice_read+0x252/0x340 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+0x63e/0xbb0 fs/read_write.c:1249
 __do_sys_sendfile64 fs/read_write.c:1314 [inline]
 __se_sys_sendfile64 fs/read_write.c:1300 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1300
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000001 -> 0x0000000000000080

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 24719 Comm: syz-executor.4 Tainted: G        W         5.15.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (352):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/09/14 20:17	upstream	1619b69edce1	07e953c1	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/14 15:11	upstream	d0ee23f9d78b	07e953c1	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/14 09:21	upstream	d0ee23f9d78b	58d09404	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/12 22:15	upstream	78e709522d2c	3ce60af8	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/12 01:43	upstream	c605c39677b9	3ce60af8	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/07 21:24	upstream	0bcfe68b8767	064c9eb7	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/06 10:42	upstream	27151f177827	6ca60148	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/03 11:43	upstream	a9c9a6f741cd	d236a457	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/02 22:20	upstream	7ba88a2a09f4	f62a5829	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/09/02 07:55	upstream	4ac6d90867a4	7eb7e152	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/31 22:05	upstream	b91db6a0b52e	7eb7e152	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/31 12:15	upstream	b91db6a0b52e	8f58a0ef	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/31 12:12	upstream	b91db6a0b52e	8f58a0ef	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/30 10:23	upstream	7d2a07b76933	8f58a0ef	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/29 21:24	upstream	537b57bd5a20	be2c130d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/28 19:28	upstream	3f5ad13cb012	be2c130d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/28 17:16	upstream	64b4fc45bea6	be2c130d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/28 05:13	upstream	64b4fc45bea6	d5a29e53	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/26 03:16	upstream	fe67f4dd8daa	b599f2fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/21 17:56	upstream	002c0aef1090	b599f2fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/20 16:06	upstream	d992fe5318d8	b599f2fc	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/18 11:19	upstream	614cb2751d31	a2fe1cb5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/16 09:21	upstream	7c60610d4767	2489ab88	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/15 19:57	upstream	ecf93431963a	2489ab88	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/15 06:47	upstream	0aa78d17099b	2489ab88	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/14 18:15	upstream	ba31f97d43be	2489ab88	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/12 17:08	upstream	1746f4db5135	c551a195	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/12 13:31	upstream	1746f4db5135	6972b106	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/10 20:59	upstream	9e723c5380c6	6972b106	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/06 22:37	upstream	894d6f401b21	6972b106	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/06 16:55	upstream	902e7f373fff	6972b106	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/05 19:43	upstream	e04480920d1e	d2d6e680	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/03 21:09	upstream	d5ad8ec3cfb5	6c236867	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/02 12:37	upstream	c500bee1c5b2	6c236867	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/08/01 20:10	upstream	d4affd6b6e81	6c236867	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/07/31 21:52	upstream	f3438b4c4e69	6c236867	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/07/31 08:23	upstream	c7d102232649	6c236867	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/07/31 05:42	upstream	4669e13cd67f	6c236867	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/07/30 17:45	upstream	764a5bc89b12	6c236867	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/07/30 05:57	upstream	764a5bc89b12	c585c7b0	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/07/30 04:20	upstream	7e96bf476270	c585c7b0	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/07/29 10:55	upstream	4010a528219e	b44001ce	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/07/28 10:38	upstream	7d549995d4e0	17d6ab15	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/17 10:51	upstream	0da0a8a0a0e1	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/08/25 02:59	upstream	6a9dc5fd6170	344da168	.config	log	report
ci2-upstream-kcsan-gce	2020/08/21 07:24	upstream	da2968ff879b	1d75fe45	.config	log	report
ci2-upstream-kcsan-gce	2020/06/18 22:24	upstream	1b5044021070	3ea11d3f	.config	log	report