KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait

KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range (2)
Status: moderation: reported on 2020/11/08 03:54
Reported-by: syzbot+07c64eb90f8d46abb4c1@syzkaller.appspotmail.com
First crash: 358d, last: 4d15h

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range				18	370d	581d	0/22	closed as invalid on 2020/06/18 14:24

Sample crash report:

==================================================================
BUG: KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range

write to 0xffff8881004055b0 of 8 bytes by task 25348 on cpu 1:
 __add_to_page_cache_locked+0x256/0x4e0 mm/filemap.c:914
 add_to_page_cache_lru+0xa0/0x1b0 mm/filemap.c:967
 page_cache_ra_unbounded+0x262/0x410 mm/readahead.c:221
 do_page_cache_ra mm/readahead.c:267 [inline]
 force_page_cache_ra+0x246/0x280 mm/readahead.c:299
 page_cache_sync_ra+0xcc/0xe0 mm/readahead.c:573
 page_cache_sync_readahead include/linux/pagemap.h:879 [inline]
 filemap_get_pages mm/filemap.c:2467 [inline]
 filemap_read+0x388/0x1230 mm/filemap.c:2550
 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2701
 blkdev_read_iter+0xb9/0xf0 fs/block_dev.c:1730
 call_read_iter include/linux/fs.h:2108 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x565/0x5d0 fs/read_write.c:496
 ksys_read+0xce/0x180 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:642
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881004055b0 of 8 bytes by task 25355 on cpu 0:
 mapping_needs_writeback mm/filemap.c:621 [inline]
 file_write_and_wait_range+0x48/0x210 mm/filemap.c:791
 blkdev_fsync+0x42/0xa0 fs/block_dev.c:695
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2982 [inline]
 blkdev_write_iter+0x25f/0x2b0 fs/block_dev.c:1705
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x69d/0x770 fs/read_write.c:605
 ksys_write+0xce/0x180 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:667
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000000 -> 0x0000000000000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 25355 Comm: syz-executor.2 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (117):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/06/15 15:32	upstream	009c9aa5	8022d7e3	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/06/09 13:04	upstream	368094df	84fe5d96	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/05/25 03:25	upstream	1434a312	3c7fef33	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/05/21 22:35	upstream	79a106fc	3c7fef33	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/05/20 12:03	upstream	c3d0e3fd	c560a65d	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/05/18 04:19	upstream	8ac91e6c	a343ba6b	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/05/10 02:42	upstream	9819f682	bc5434be	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/05/09 14:04	upstream	b7415964	bc5434be	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/05/04 14:54	upstream	5e321ded	06c27ff5	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/29 10:37	upstream	d72cd4ad	77e2b668	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/24 01:38	upstream	8db5efb8	17f0b706	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/22 23:00	upstream	90c911ad	33c28d03	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/21 21:02	upstream	16fc44d6	2bc8999a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/19 08:14	upstream	bf05bf16	50f523d7	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/17 20:56	upstream	194cf482	7e2b734b	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/16 18:56	upstream	2f7b98d1	7e2b734b	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/16 06:16	upstream	7e25f40e	c59079a6	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/15 16:39	upstream	7f75285c	c59079a6	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/14 12:47	upstream	50987bec	3134b37f	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/10 16:16	upstream	d4961772	6a81331a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/10 04:12	upstream	4e04e751	6a81331a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/09 11:50	upstream	17e7124a	6a81331a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/08 10:49	upstream	454859c5	6a81331a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/05 20:57	upstream	0a50438c	6a81331a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/04/02 23:49	upstream	0a84c2e4	6a81331a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/31 06:21	upstream	5e46d1b7	6a81331a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/30 23:11	upstream	2bb25b3a	6a81331a	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/25 11:43	upstream	e1381380	6a383ecf	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/24 14:49	upstream	7acac4b3	607e3baf	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/22 18:53	upstream	0d02ec6b	8092f30d	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/21 17:07	upstream	812da4d3	4c9a64da	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/21 00:39	upstream	812da4d3	17810eae	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/15 14:04	upstream	1e28eed1	cc1cff8f	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/13 22:09	upstream	88fe4924	4a003785	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/13 09:39	upstream	f296bfd5	4a003785	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/10 06:22	upstream	05a59d79	26967e35	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/03/04 09:42	upstream	f69d02e3	d7e4e604	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/02/23 04:01	upstream	b12b4724	fcc6d71b	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/02/22 18:20	upstream	31caf8b2	c26fb06b	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/02/20 10:13	upstream	f40ddce8	3e5ed8b4	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/02/17 23:16	upstream	f40ddce8	14052202	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/02/15 03:03	upstream	f40ddce8	98682e5e	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/02/07 09:05	upstream	825b5991	2ce644fc	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/02/03 20:44	upstream	3afe9076	624dad51	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/02/02 23:51	upstream	3aaf0a27	624dad51	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/01/30 23:39	upstream	8c947645	fc9fd31e	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/01/24 00:28	upstream	e1ae4b0b	52e37319	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/01/17 18:20	upstream	0da0a8a0	fd103621	.config	log	report	info	KCSAN: data-race in __add_to_page_cache_locked / file_write_and_wait_range
ci2-upstream-kcsan-gce	2021/01/16 07:20	upstream	1d94330a	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/06 23:18	upstream	bf3e7628	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/04 03:41	upstream	4ef8451b	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/06/26 17:13	upstream	4a21185c	9506ea6d	.config	log	report