KCSAN: data-race in wbt_wait / wbt

KCSAN: data-race in wbt_wait / wbt_wait
Status: moderation: reported on 2019/10/29 20:02
Reported-by: syzbot+ba8947364367f96fe16b@syzkaller.appspotmail.com
First crash: 548d, last: 8d12h

Sample crash report:

==================================================================
BUG: KCSAN: data-race in wbt_wait / wbt_wait

write to 0xffff888103a38240 of 8 bytes by task 1295 on cpu 1:
 wb_timestamp block/blk-wbt.c:89 [inline]
 wbt_wait+0x12b/0x2b0 block/blk-wbt.c:579
 __rq_qos_throttle+0x39/0x70 block/blk-rq-qos.c:72
 rq_qos_throttle block/blk-rq-qos.h:182 [inline]
 blk_mq_submit_bio+0x253/0x1060 block/blk-mq.c:2185
 __submit_bio_noacct_mq block/blk-core.c:1014 [inline]
 submit_bio_noacct+0x7c2/0x9a0 block/blk-core.c:1047
 submit_bio+0x200/0x370 block/blk-core.c:1118
 ext4_mpage_readpages+0x14f6/0x1550 fs/ext4/readpage.c:411
 ext4_readahead+0x99/0xa0 fs/ext4/inode.c:3262
 read_pages+0x9c/0x6e0 mm/readahead.c:130
 page_cache_ra_unbounded+0x46c/0x4c0 mm/readahead.c:238
 ondemand_readahead+0x560/0x780 mm/readahead.c:267
 page_cache_sync_ra+0x18f/0x1a0 mm/readahead.c:577
 page_cache_sync_readahead include/linux/pagemap.h:840 [inline]
 filemap_get_pages+0x1ba/0x660 mm/filemap.c:2375
 filemap_read+0x1ba/0x7b0 mm/filemap.c:2458
 generic_file_read_iter+0x82/0x410 mm/filemap.c:2609
 ext4_file_read_iter+0x2e0/0x420 fs/ext4/file.c:74
 call_read_iter include/linux/fs.h:1971 [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+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 0xffff888103a38240 of 8 bytes by task 1303 on cpu 0:
 wb_timestamp block/blk-wbt.c:88 [inline]
 wbt_wait+0xcf/0x2b0 block/blk-wbt.c:579
 __rq_qos_throttle+0x39/0x70 block/blk-rq-qos.c:72
 rq_qos_throttle block/blk-rq-qos.h:182 [inline]
 blk_mq_submit_bio+0x253/0x1060 block/blk-mq.c:2185
 __submit_bio_noacct_mq block/blk-core.c:1014 [inline]
 submit_bio_noacct+0x7c2/0x9a0 block/blk-core.c:1047
 submit_bio+0x200/0x370 block/blk-core.c:1118
 ext4_mpage_readpages+0x14f6/0x1550 fs/ext4/readpage.c:411
 ext4_readahead+0x99/0xa0 fs/ext4/inode.c:3262
 read_pages+0x9c/0x6e0 mm/readahead.c:130
 page_cache_ra_unbounded+0x46c/0x4c0 mm/readahead.c:238
 ondemand_readahead+0x560/0x780 mm/readahead.c:267
 page_cache_sync_ra+0x18f/0x1a0 mm/readahead.c:577
 page_cache_sync_readahead include/linux/pagemap.h:840 [inline]
 filemap_get_pages+0x1ba/0x660 mm/filemap.c:2375
 filemap_read+0x1ba/0x7b0 mm/filemap.c:2458
 generic_file_read_iter+0x82/0x410 mm/filemap.c:2609
 ext4_file_read_iter+0x2e0/0x420 fs/ext4/file.c:74
 call_read_iter include/linux/fs.h:1971 [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+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: 1303 Comm: syz-executor.0 Tainted: G        W         5.12.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (236):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/04/14 21:20	upstream	50987bec	3134b37f	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/04/14 02:22	upstream	eebe426d	a184b83e	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/04/10 05:00	upstream	4e04e751	6a81331a	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/04/08 13:48	upstream	454859c5	6a81331a	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/04/07 23:53	upstream	3a229812	6a81331a	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/04/04 05:03	upstream	2023a53b	6a81331a	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/04/03 16:11	upstream	d93a0d43	6a81331a	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/04/01 05:01	upstream	d19cc4bf	6a81331a	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/31 07:39	upstream	5e46d1b7	6a81331a	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/30 07:34	upstream	1e43c377	6a81331a	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/29 10:39	upstream	a5e13c6d	a8529b82	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/28 10:43	upstream	0f4498ce	a8529b82	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/24 22:31	upstream	4ee998b0	607e3baf	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/23 21:10	upstream	7acac4b3	e613994b	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/22 03:14	upstream	5ee96fa9	bea32f74	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/20 21:46	upstream	812da4d3	17810eae	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/19 13:24	upstream	8b12a62a	2af9d324	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/17 14:50	upstream	1df27313	fdb2bb2c	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/16 12:29	upstream	1a4431a5	fdb2bb2c	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/15 15:36	upstream	1e28eed1	fdb2bb2c	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/14 08:15	upstream	88fe4924	4a003785	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/13 09:01	upstream	f296bfd5	4a003785	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/10 19:09	upstream	05a59d79	764067f3	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/10 07:14	upstream	05a59d79	26967e35	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/03/07 10:48	upstream	a38fd874	c599ed12	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/23 23:39	upstream	3b9cdafb	fcc6d71b	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/20 12:45	upstream	f40ddce8	3e5ed8b4	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/15 03:43	upstream	f40ddce8	98682e5e	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/13 23:36	upstream	ac30d8ce	98682e5e	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/13 14:12	upstream	c6d8570e	98682e5e	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/12 19:40	upstream	dcc0b490	98682e5e	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/11 23:34	upstream	291009f6	a5f86b15	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/10 08:48	upstream	e0756cfc	9c8b8541	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/08 23:26	upstream	e0756cfc	2bd9619f	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/08 09:14	upstream	b75dba7f	2ce644fc	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/07 17:22	upstream	825b5991	2ce644fc	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/05 13:25	upstream	dd86e7fa	23a562df	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/04 11:39	upstream	61556703	42b90a7c	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/03 22:02	upstream	3afe9076	624dad51	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/03 08:30	upstream	3aaf0a27	624dad51	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/02/02 09:03	upstream	88bb507a	19e09687	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/01/31 21:46	upstream	6642d600	fc9fd31e	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/01/28 19:47	upstream	e5ff2cb9	7df34f59	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/01/25 07:41	upstream	e6806137	52e37319	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/01/24 03:43	upstream	e1ae4b0b	52e37319	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/01/22 20:45	upstream	83d09ad4	52e37319	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/01/22 16:06	upstream	83d09ad4	d4f4eca5	.config	log	report	info	KCSAN: data-race in wbt_wait / wbt_wait
ci2-upstream-kcsan-gce	2021/01/14 04:19	upstream	65f0d241	269d24e8	.config	log	report	info
ci2-upstream-kcsan-gce	2019/10/23 04:53	https://github.com/google/ktsan.git kcsan	05f22368	d0686497	.config	log	report