KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw

KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue (2)
Status: moderation: reported on 2020/09/05 11:19
Reported-by: syzbot+f5359a7d0291ed059d6a@syzkaller.appspotmail.com
First crash: 358d, last: 2d07h

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue				17	366d	424d	0/22	closed as invalid on 2020/06/18 14:24

Sample crash report:

==================================================================
BUG: KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue

write to 0xffff888101b36410 of 8 bytes by task 879 on cpu 1:
 __list_add include/linux/list.h:70 [inline]
 list_add include/linux/list.h:86 [inline]
 blk_mq_request_bypass_insert+0x6a/0x150 block/blk-mq.c:1878
 blk_mq_sched_insert_request+0x107/0x280 block/blk-mq-sched.c:452
 blk_mq_requeue_work+0x3ab/0x420 block/blk-mq.c:795
 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2276
 worker_thread+0x636/0xae0 kernel/workqueue.c:2422
 kthread+0x1d0/0x1f0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff888101b36410 of 8 bytes by task 11257 on cpu 0:
 list_empty_careful include/linux/list.h:319 [inline]
 blk_mq_hctx_has_pending block/blk-mq.c:72 [inline]
 blk_mq_run_hw_queue+0x129/0x250 block/blk-mq.c:1625
 blk_mq_sched_insert_requests+0x13f/0x200 block/blk-mq-sched.c:503
 blk_mq_flush_plug_list+0x2f5/0x3c0 block/blk-mq.c:1954
 blk_flush_plug_list+0x235/0x260 block/blk-core.c:1747
 blk_finish_plug+0x44/0x60 block/blk-core.c:1764
 ext4_writepages+0x18a1/0x1d10 fs/ext4/inode.c:2851
 do_writepages+0x7b/0x150 mm/page-writeback.c:2352
 __filemap_fdatawrite_range mm/filemap.c:413 [inline]
 file_write_and_wait_range+0x180/0x210 mm/filemap.c:792
 ext4_sync_file+0x105/0x670 fs/ext4/fsync.c:151
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2982 [inline]
 ext4_buffered_write_iter+0x39c/0x3f0 fs/ext4/file.c:277
 ext4_file_write_iter+0x2e7/0x11d0 fs/ext4/file.c:519
 call_write_iter include/linux/fs.h:2114 [inline]
 do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740
 do_iter_write+0x112/0x4c0 fs/read_write.c:866
 vfs_iter_write+0x4c/0x70 fs/read_write.c:907
 iter_file_splice_write+0x40a/0x750 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+0xf5/0x170 fs/splice.c:979
 do_sendfile+0x773/0xda0 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1319 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1311
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0xffff888101b36408 -> 0xffff8881027c6448

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 11257 Comm: syz-executor.3 Not tainted 5.13.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (339):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/06/15 10:59	upstream	009c9aa5	8022d7e3	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/06/14 09:49	upstream	009c9aa5	1ba81399	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/06/13 20:43	upstream	e4e45343	1ba81399	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/06/11 08:17	upstream	f09eacca	1ba81399	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/06/10 10:00	upstream	cd1245d7	1ba81399	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/06/08 12:51	upstream	614124be	5c2fe346	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/06/05 09:30	upstream	16f0596f	500c2339	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/31 16:30	upstream	8124c8a6	032639db	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/29 17:33	upstream	f956cb99	325a8dab	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/27 14:42	upstream	d7c5303f	858ea628	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/26 12:24	upstream	ad9f25d3	750ce164	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/25 23:29	upstream	a050a6d2	93d3a9f6	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/25 05:19	upstream	1434a312	3c7fef33	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/23 14:37	upstream	4d762034	3c7fef33	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/23 04:08	upstream	23d72926	3c7fef33	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/19 06:59	upstream	8ac91e6c	a343ba6b	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/17 13:08	upstream	d07f6ca9	a2eb125d	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/17 04:40	upstream	d07f6ca9	f54a5c09	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/16 19:37	upstream	63d1cb53	f54a5c09	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/14 23:26	upstream	bd3c9cdb	8bdd5343	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/14 12:17	upstream	315d9931	8bdd5343	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/12 23:37	upstream	dbb5afad	ed7d41c5	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/12 15:08	upstream	88b06399	86294427	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/11 12:52	upstream	1140ab59	ca873091	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/10 14:00	upstream	6efb943b	ca873091	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/09 16:53	upstream	b7415964	bc5434be	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/07 16:40	upstream	e4866123	f6da8120	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/06 23:50	upstream	8404c9fb	06585184	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/06 13:34	upstream	8404c9fb	06c27ff5	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/05 21:44	upstream	a79cdfba	06c27ff5	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/05 16:53	upstream	d665ea6e	06c27ff5	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/04 16:49	upstream	5e321ded	06c27ff5	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/04 02:49	upstream	5e321ded	09efdd63	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/05/02 18:06	upstream	17ae69ab	77e2b668	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/30 04:56	upstream	8ca5297e	77e2b668	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/29 20:23	upstream	d72cd4ad	77e2b668	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/27 14:03	upstream	4a0225c3	805b5003	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/26 11:35	upstream	9f4ad9e4	805b5003	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/26 00:27	upstream	d2d09fbe	2a82f1b3	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/25 13:23	upstream	2a1d7946	36c88236	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/24 20:07	upstream	2a1d7946	17f0b706	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/23 05:50	upstream	90c911ad	590921a5	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/22 16:17	upstream	16fc44d6	33c28d03	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/22 00:38	upstream	16fc44d6	2bc8999a	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/21 00:17	upstream	1fe5501b	c0ced557	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/18 02:59	upstream	194cf482	7e2b734b	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/17 01:48	upstream	2f7b98d1	7e2b734b	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/14 18:36	upstream	50987bec	3134b37f	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/13 22:23	upstream	eebe426d	a184b83e	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/04/13 18:58	upstream	89698bec	a184b83e	.config	log	report	info	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue
ci2-upstream-kcsan-gce	2021/01/17 11:22	upstream	0da0a8a0	813be542	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/04 22:27	upstream	c70672d8	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/09/01 11:12	upstream	b51594df	d5a3ae1f	.config	log	report
ci2-upstream-kcsan-gce	2020/06/24 10:14	upstream	3e08a952	bbad15ae	.config	log	report