KCSAN: data-race in dd_has_work / dd_insert

KCSAN: data-race in dd_has_work / dd_insert_request
Status: moderation: reported on 2021/03/30 11:56
Reported-by: syzbot+7cd16c2f3f9c292c2ae7@syzkaller.appspotmail.com
First crash: 50d, last: 6h21m

Sample crash report:

==================================================================
BUG: KCSAN: data-race in dd_has_work / dd_insert_request

write to 0xffff888102466d28 of 8 bytes by task 12092 on cpu 0:
 __list_add include/linux/list.h:70 [inline]
 list_add_tail include/linux/list.h:100 [inline]
 dd_insert_request+0x2a0/0x3b0 block/mq-deadline.c:521
 dd_insert_requests+0xfe/0x170 block/mq-deadline.c:537
 blk_mq_sched_insert_request+0x237/0x280 block/blk-mq-sched.c:448
 blk_mq_submit_bio+0x523/0xde0 block/blk-mq.c:2243
 __submit_bio_noacct_mq block/blk-core.c:1014 [inline]
 submit_bio_noacct+0x6f2/0x7e0 block/blk-core.c:1047
 submit_bio+0x16d/0x2b0 block/blk-core.c:1090
 submit_bh_wbc+0x2f3/0x330 fs/buffer.c:3055
 submit_bh fs/buffer.c:3061 [inline]
 __sync_dirty_buffer+0x136/0x1e0 fs/buffer.c:3156
 sync_dirty_buffer+0x16/0x20 fs/buffer.c:3169
 __ext4_handle_dirty_metadata+0x1d3/0x590 fs/ext4/ext4_jbd2.c:364
 __ext4_ext_dirty fs/ext4/extents.c:165 [inline]
 ext4_split_extent_at+0x41c/0xb40 fs/ext4/extents.c:3197
 ext4_force_split_extent_at fs/ext4/extents.c:305 [inline]
 ext4_swap_extents+0xd76/0x13a0 fs/ext4/extents.c:5664
 move_extent_per_page fs/ext4/move_extent.c:339 [inline]
 ext4_move_extents+0x1fec/0x2250 fs/ext4/move_extent.c:673
 __ext4_ioctl fs/ext4/ioctl.c:992 [inline]
 ext4_ioctl+0x197c/0x2c00 fs/ext4/ioctl.c:1332
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739
 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888102466d28 of 8 bytes by task 882 on cpu 1:
 list_empty_careful include/linux/list.h:319 [inline]
 dd_has_work+0xd3/0xe0 block/mq-deadline.c:586
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:135 [inline]
 blk_mq_do_dispatch_sched+0x138/0x610 block/blk-mq-sched.c:199
 __blk_mq_sched_dispatch_requests+0x21e/0x2c0 block/blk-mq-sched.c:310
 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:341
 __blk_mq_run_hw_queue+0xbc/0x140 block/blk-mq.c:1488
 blk_mq_run_work_fn+0x3d/0x50 block/blk-mq.c:1820
 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2275
 worker_thread+0x636/0xae0 kernel/workqueue.c:2421
 kthread+0x1d0/0x1f0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 882 Comm: kworker/1:1H Tainted: G        W         5.12.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: kblockd blk_mq_run_work_fn
==================================================================
==================================================================
BUG: KCSAN: data-race in dd_has_work / dd_insert_request

write to 0xffff888102466d28 of 8 bytes by task 12115 on cpu 0:
 __list_add include/linux/list.h:70 [inline]
 list_add_tail include/linux/list.h:100 [inline]
 dd_insert_request+0x2a0/0x3b0 block/mq-deadline.c:521
 dd_insert_requests+0xfe/0x170 block/mq-deadline.c:537
 blk_mq_sched_insert_request+0x237/0x280 block/blk-mq-sched.c:448
 blk_mq_submit_bio+0x523/0xde0 block/blk-mq.c:2243
 __submit_bio_noacct_mq block/blk-core.c:1014 [inline]
 submit_bio_noacct+0x6f2/0x7e0 block/blk-core.c:1047
 submit_bio+0x16d/0x2b0 block/blk-core.c:1090
 submit_bh_wbc+0x2f3/0x330 fs/buffer.c:3055
 submit_bh fs/buffer.c:3061 [inline]
 __sync_dirty_buffer+0x136/0x1e0 fs/buffer.c:3156
 sync_dirty_buffer+0x16/0x20 fs/buffer.c:3169
 __ext4_handle_dirty_metadata+0x1d3/0x590 fs/ext4/ext4_jbd2.c:364
 __ext4_ext_dirty fs/ext4/extents.c:165 [inline]
 ext4_swap_extents+0x1100/0x13a0 fs/ext4/extents.c:5695
 move_extent_per_page fs/ext4/move_extent.c:339 [inline]
 ext4_move_extents+0x1fec/0x2250 fs/ext4/move_extent.c:673
 __ext4_ioctl fs/ext4/ioctl.c:992 [inline]
 ext4_ioctl+0x197c/0x2c00 fs/ext4/ioctl.c:1332
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739
 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888102466d28 of 8 bytes by task 882 on cpu 1:
 list_empty_careful include/linux/list.h:319 [inline]
 dd_has_work+0xd3/0xe0 block/mq-deadline.c:586
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:135 [inline]
 blk_mq_do_dispatch_sched+0x138/0x610 block/blk-mq-sched.c:199
 __blk_mq_sched_dispatch_requests+0x21e/0x2c0 block/blk-mq-sched.c:310
 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:341
 __blk_mq_run_hw_queue+0xbc/0x140 block/blk-mq.c:1488
 blk_mq_run_work_fn+0x3d/0x50 block/blk-mq.c:1820
 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2275
 worker_thread+0x636/0xae0 kernel/workqueue.c:2421
 kthread+0x1d0/0x1f0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 882 Comm: kworker/1:1H Tainted: G        W         5.12.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: kblockd blk_mq_run_work_fn
==================================================================

Crashes (111):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/04/23 12:01	upstream	18a3c5f7	17f0b706	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/23 00:03	upstream	90c911ad	590921a5	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/22 22:40	upstream	90c911ad	33c28d03	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/21 20:48	upstream	16fc44d6	2bc8999a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/21 18:45	upstream	16fc44d6	95777977	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/21 08:12	upstream	1fe5501b	95777977	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/21 00:11	upstream	1fe5501b	c0ced557	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/20 07:24	upstream	7af08140	c0ced557	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/19 22:32	upstream	7af08140	4285c989	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/19 19:29	upstream	bf05bf16	4285c989	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/19 07:27	upstream	bf05bf16	50f523d7	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/18 22:55	upstream	bf05bf16	7e2b734b	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/18 09:19	upstream	c98ff1d0	7e2b734b	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/17 20:19	upstream	194cf482	7e2b734b	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/17 06:55	upstream	9cdbf646	7e2b734b	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/16 18:08	upstream	2f7b98d1	7e2b734b	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/16 12:29	upstream	7e25f40e	7e2b734b	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/16 05:44	upstream	7e25f40e	c59079a6	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/15 16:39	upstream	7f75285c	c59079a6	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/14 23:04	upstream	7f75285c	fcdb12ba	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/14 11:51	upstream	50987bec	3134b37f	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/13 21:44	upstream	eebe426d	a184b83e	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/13 18:41	upstream	89698bec	a184b83e	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/12 23:15	upstream	89698bec	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/12 09:47	upstream	d434405a	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/11 19:21	upstream	7d900724	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/11 03:53	upstream	52e44129	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/10 14:41	upstream	d4961772	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/10 01:12	upstream	4e04e751	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/09 11:13	upstream	17e7124a	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/08 21:53	upstream	3fb4f979	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/08 08:56	upstream	454859c5	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/07 19:24	upstream	3a229812	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/06 21:26	upstream	2d743660	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/05 18:38	upstream	0a50438c	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/04 22:45	upstream	e49d033b	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/04 03:22	upstream	2023a53b	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/03 13:07	upstream	d93a0d43	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/02 23:42	upstream	0a84c2e4	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/02 07:16	upstream	1678e493	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/04/01 18:19	upstream	ffd9fb54	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/03/31 19:50	upstream	d19cc4bf	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/03/29 20:13	upstream	1e43c377	6a81331a	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/03/26 11:46	upstream	db24726b	a8529b82	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request
ci2-upstream-kcsan-gce	2021/03/03 18:27	upstream	f69d02e3	06ed56cd	.config	log	report	info	KCSAN: data-race in dd_has_work / dd_insert_request