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: 392d, last: 22h07m

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	633d	644d	0/22	closed as invalid on 2019/11/19 13:24
upstream	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty (2)				19	405d	609d	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 0xffff888106678a08 of 8 bytes by task 6768 on cpu 0:
 __mark_inode_dirty+0x1c4/0x680 fs/fs-writeback.c:2433
 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:2455 [inline]
 filemap_read+0x11b9/0x1220 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_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888106678a08 of 8 bytes by task 6797 on cpu 1:
 __mark_inode_dirty+0xda/0x680 fs/fs-writeback.c:2419
 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:2455 [inline]
 filemap_read+0x11b9/0x1220 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_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000000 -> 0x0000000000000007

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 6797 Comm: syz-executor.3 Not tainted 5.14.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (141):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
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	2021/06/30 11:01	upstream	007b350a5875	84fd4c77	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/25 14:49	upstream	44db63d1ad8d	ae6bf8dd	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/23 05:20	upstream	0c18f29aae7c	aba2b2fb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/18 02:17	upstream	fd0aa1a4567d	aba2b2fb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/16 21:58	upstream	6b00bc639f1f	aba2b2fb	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/15 22:16	upstream	94f0b2d4a1d0	990d3cbe	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/08 17:52	upstream	4c8684fe555e	5c2fe346	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/02 16:50	upstream	231bc5390667	0740de69	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/02 04:27	upstream	231bc5390667	032639db	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/29 15:53	upstream	6799d4f2da49	325a8dab	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/26 23:02	upstream	7ac3a1c1ae51	858ea628	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/25 03:38	upstream	1434a3127887	3c7fef33	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/24 05:03	upstream	6ebb6814a1ef	3c7fef33	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/23 08:33	upstream	4d7620341eda	3c7fef33	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/22 18:48	upstream	23d729263037	3c7fef33	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/21 14:43	upstream	79a106fc6585	3c7fef33	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/20 17:40	upstream	f01da525b3de	c560a65d	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/17 23:26	upstream	8ac91e6c6033	a343ba6b	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/16 01:36	upstream	c12a29ed9094	f54a5c09	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/12 19:08	upstream	dbb5afad100a	ed7d41c5	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/11 19:01	upstream	88b06399c9c7	b3c3bb8e	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/10 11:07	upstream	6efb943b8616	bc5434be	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/03 19:22	upstream	6f8ee8d36d07	ad61f371	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/03 05:18	upstream	9ccce092fc64	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/01 09:47	upstream	9f67672a817e	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/29 11:41	upstream	d72cd4ad4174	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/28 21:56	upstream	68a32ba14177	77e2b668	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/27 23:47	upstream	e359bce39d90	805b5003	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/25 18:42	upstream	d2d09fbe33f8	36c88236	.config	log	report	info	KCSAN: data-race in __mark_inode_dirty / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/25 07:07	upstream	2a1d7946fa53	36c88236	.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