KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait

KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
Status: moderation: reported on 2022/01/06 20:11
Reported-by: syzbot+06d291120ff02d083cb8@syzkaller.appspotmail.com
First crash: 84d, last: 19h54m

Sample crash report:

==================================================================
BUG: KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range

write to 0xffff8881344da930 of 8 bytes by task 7200 on cpu 1:
 __filemap_add_folio+0x256/0x4d0 mm/filemap.c:897
 filemap_add_folio+0x6b/0x150 mm/filemap.c:950
 page_cache_ra_unbounded+0x274/0x400 mm/readahead.c:221
 ondemand_readahead+0x4f8/0x700
 page_cache_sync_ra+0xaf/0xe0 mm/readahead.c:579
 page_cache_sync_readahead include/linux/pagemap.h:1056 [inline]
 filemap_get_pages mm/filemap.c:2589 [inline]
 filemap_read+0x3ed/0x1430 mm/filemap.c:2676
 generic_file_read_iter+0x72/0x320 mm/filemap.c:2822
 call_read_iter include/linux/fs.h:2068 [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 0xffff8881344da930 of 8 bytes by task 7242 on cpu 0:
 mapping_needs_writeback mm/filemap.c:623 [inline]
 filemap_write_and_wait_range+0x36/0x340 mm/filemap.c:668
 __iomap_dio_rw+0x535/0x10b0 fs/iomap/direct-io.c:561
 iomap_dio_rw+0x38/0x80 fs/iomap/direct-io.c:680
 ext4_dio_write_iter fs/ext4/file.c:564 [inline]
 ext4_file_write_iter+0x7d5/0xda0 fs/ext4/file.c:675
 call_write_iter include/linux/fs.h:2074 [inline]
 do_iter_readv_writev+0x2de/0x380 fs/read_write.c:725
 do_iter_write+0x192/0x5c0 fs/read_write.c:851
 vfs_iter_write+0x4c/0x70 fs/read_write.c:892
 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+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: 0x00000000000006b1 -> 0x00000000000006b8

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7242 Comm: syz-executor.5 Not tainted 5.17.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (65):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2022/01/24 07:40	upstream	dd81e1c7d5fb	214351e1	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/20 17:57	upstream	fa2e1ba3e9e3	b838eb76	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/19 14:59	upstream	e9f5cbc0c851	0620189b	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/18 13:12	upstream	e3a8b6a1e70c	731a2d23	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/17 11:18	upstream	0c947b893d69	731a2d23	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/16 21:37	upstream	79e06c4c4950	723cfaf0	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/15 23:53	upstream	a33f5c380c4b	723cfaf0	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/14 16:01	upstream	871bfa02d08d	53e00b45	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/12 02:28	upstream	6f38be8f2ccd	44d1319a	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/11 03:02	upstream	133d9c53c9dc	ddb0ab8c	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/10 15:41	upstream	df0cc57e057f	2ca0d385	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/09 09:56	upstream	21f35d2ca83e	2ca0d385	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/08 08:25	upstream	d1587f7bfe9a	2ca0d385	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/07 13:35	upstream	ddec8ed2d490	6acc789a	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/07 04:48	upstream	b2b436ec0205	6acc789a	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/06 17:04	upstream	75acfdb6fd92	6acc789a	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/03 16:45	upstream	c9e6606c7fe9	4a3f34f2	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2022/01/01 05:12	upstream	800829388818	e1768e9c	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/31 09:52	upstream	9bad743e8d22	36bd2e48	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/30 04:20	upstream	eec4df26e24e	6cc879d4	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/28 23:24	upstream	ecf71de775a0	76c8cf06	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/27 19:19	upstream	a8ad9a2434dc	5140bd58	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/26 18:46	upstream	438645193e59	e4f103c4	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/26 00:08	upstream	e2ae0d4a6b0b	6caa12e4	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/25 01:25	upstream	b927dfc67d05	6caa12e4	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/21 10:03	upstream	6e0567b73052	a938f0b8	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/16 17:48	upstream	2b14864acbaa	8dd6a5e3	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/15 02:16	upstream	5472f14a3742	f752fb53	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/14 20:31	upstream	5472f14a3742	d018dd31	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/14 03:01	upstream	5472f14a3742	5d14b1ea	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/13 21:45	upstream	2585cf9dfaad	0304899b	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/12 20:18	upstream	90d9fbc16b69	49ca1f59	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/11 14:11	upstream	9e65da135b39	49ca1f59	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/10 19:49	upstream	c741e49150db	fc17c959	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/10 07:01	upstream	ded746bfc943	4d4ce9bc	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/09 13:36	upstream	2a987e65025e	b54aa474	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/08 03:23	upstream	2a987e65025e	0230ba3e	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/05 14:03	upstream	79a72162048e	a617004c	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/02 20:15	upstream	a51e3ac43ddb	61f86278	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/12/01 19:48	upstream	58e1100fdc59	61f86278	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/28 22:36	upstream	d06c942efea4	63eeac02	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/26 18:36	upstream	a4849f6000e2	63eeac02	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/26 03:21	upstream	b501b85957de	63eeac02	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/24 00:40	upstream	5d9f4cf36721	545ab074	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/21 23:31	upstream	40c93d7fff6f	4eb20a4e	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/20 22:43	upstream	61564e7b3abc	4eb20a4e	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/20 05:24	upstream	a90af8f15bdc	4eb20a4e	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/20 00:53	upstream	4c388a8e740d	3a9d0024	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/18 21:21	upstream	6fdf886424cf	31a30fc0	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/18 07:08	upstream	42eb8fdac2fc	cafff8b6	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/17 20:55	upstream	ee1703cda8dc	cafff8b6	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/17 06:11	upstream	8ab774587903	cafff8b6	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/15 02:40	upstream	ce49bfc8d037	75b04091	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/09 09:07	upstream	e851dfae4371	8ab17e57	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/08 15:48	upstream	6b75d88fa81b	d29682f1	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/08 03:26	upstream	6b75d88fa81b	4c1be0be	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/07 14:16	upstream	b5013d084e03	4c1be0be	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/07 02:11	upstream	512b7931ad05	4c1be0be	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/05 22:55	upstream	fe91c4725aee	4c1be0be	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/05 06:37	upstream	d4439a1189f9	4c1be0be	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/05 01:34	upstream	7ddb58cb0eca	4c1be0be	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/04 05:41	upstream	ce840177930f	4c1be0be	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/03 05:36	upstream	bfc484fe6abb	17f3edd2	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/02 11:38	upstream	bfc484fe6abb	098b5d53	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range
ci2-upstream-kcsan-gce	2021/11/01 23:42	upstream	e66435936756	098b5d53	.config	log	report	info	KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range