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: 262d, last: 2d02h

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	484d	484d	0/21	closed as invalid on 2019/11/19 14:44
upstream	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode (2)				18	266d	429d	0/21	closed as invalid on 2020/06/18 14:24

Sample crash report:

loop0: detected capacity change from 0 to 264192
FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
==================================================================
BUG: KCSAN: data-race in __mark_inode_dirty / writeback_single_inode

write to 0xffff88810dbcf1a0 of 8 bytes by task 10293 on cpu 1:
 writeback_single_inode+0x105/0x580 fs/fs-writeback.c:1577
 sync_inode fs/fs-writeback.c:2624 [inline]
 sync_inode_metadata+0x52/0x70 fs/fs-writeback.c:2644
 __generic_file_fsync+0xf5/0x140 fs/libfs.c:1089
 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:2843 [inline]
 generic_file_write_iter+0x103/0x130 mm/filemap.c:3740
 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+0x7a6/0xe20 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+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88810dbcf1a0 of 8 bytes by task 10285 on cpu 0:
 __mark_inode_dirty+0xd8/0x6f0 fs/fs-writeback.c:2295
 fat_update_time+0x125/0x140 fs/fat/misc.c:348
 update_time fs/inode.c:1778 [inline]
 touch_atime+0x15d/0x2d0 fs/inode.c:1850
 file_accessed include/linux/fs.h:2319 [inline]
 generic_file_splice_read+0x284/0x310 fs/splice.c:314
 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+0x7a6/0xe20 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+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10285 Comm: syz-executor.0 Not tainted 5.12.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (192):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/03/05 20:09	upstream	280d542f	4a024a9b	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/03/04 21:48	upstream	cee407c5	f89ed068	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/24 08:58	upstream	c03c21ba	fcc6d71b	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/21 07:13	upstream	e767b353	3e5ed8b4	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/20 12:11	upstream	f40ddce8	3e5ed8b4	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/19 14:52	upstream	f40ddce8	f689d40a	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/17 20:20	upstream	f40ddce8	14052202	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/12 09:05	upstream	dcc0b490	a5f86b15	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/06 07:26	upstream	1e0d27fc	23a562df	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/05 01:22	upstream	5c279c4c	23a562df	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/03 23:15	upstream	3afe9076	624dad51	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/02/01 15:12	upstream	1048ba83	e6b95f32	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/31 13:15	upstream	6642d600	fc9fd31e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/30 22:53	upstream	8c947645	fc9fd31e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/30 09:56	upstream	0e9bcda5	fc9fd31e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/29 11:16	upstream	bec4c296	6593fd32	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/26 17:30	upstream	13391c60	55a7d4df	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/24 19:15	upstream	e6806137	52e37319	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/22 20:55	upstream	83d09ad4	52e37319	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/21 14:27	upstream	9791581c	d4f4eca5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/21 00:07	upstream	75439bc4	d4f4eca5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/20 09:01	upstream	45dfb8a5	d4f4eca5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode
ci2-upstream-kcsan-gce	2021/01/18 15:07	upstream	19c329f6	63631df1	.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	2021/01/16 07:54	upstream	1d94330a	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/15 18:22	upstream	5ee88057	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/15 08:00	upstream	14662050	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/15 00:35	upstream	14662050	468dbb55	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/14 15:50	upstream	65f0d241	468dbb55	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/14 00:09	upstream	65f0d241	269d24e8	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/13 20:57	upstream	65f0d241	a945f0a3	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/10 21:58	upstream	0653161f	2c1f2513	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/09 11:48	upstream	996e435f	a6c52263	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/05 10:41	upstream	36bbbd0e	a0234d98	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/02 00:36	upstream	eda809ae	79264ae3	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/31 14:54	upstream	f6e1ea19	79264ae3	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/31 03:25	upstream	f6e1ea19	5cc121d6	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/30 02:54	upstream	139711f0	0fa352f2	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/29 10:51	upstream	dea8dcf2	8259d56c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/28 02:43	upstream	5c8fe583	2242f77f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/27 15:23	upstream	f838f8d2	2242f77f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/27 04:47	upstream	f838f8d2	821e0b09	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/25 13:16	upstream	71c5f031	b982b3ea	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/24 23:10	upstream	3913d00a	c2c1d1dd	.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