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: 89d, last: 5h29m

similar bugs (1):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in blk_mq_request_bypass_insert / blk_mq_run_hw_queue			17	97d	155d	0/17	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 0xffff88812a930410 of 8 bytes by task 3257 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/0x130 block/blk-mq.c:1859
 blk_mq_sched_insert_request+0x1b4/0x330 block/blk-mq-sched.c:559
 blk_mq_requeue_work+0x36b/0x490 block/blk-mq.c:813
 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269
 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415
 kthread+0x20d/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff88812a930410 of 8 bytes by task 12060 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+0x12e/0x260 block/blk-mq.c:1660
 blk_mq_sched_insert_request+0x2ae/0x330 block/blk-mq-sched.c:576
 blk_mq_submit_bio+0x988/0x1130 block/blk-mq.c:2224
 __submit_bio_noacct_mq block/blk-core.c:1180 [inline]
 submit_bio_noacct+0x772/0x950 block/blk-core.c:1213
 submit_bio+0x200/0x370 block/blk-core.c:1283
 submit_bh_wbc+0x397/0x3d0 fs/buffer.c:3070
 submit_bh fs/buffer.c:3076 [inline]
 __sync_dirty_buffer+0x12c/0x1d0 fs/buffer.c:3171
 sync_dirty_buffer+0x16/0x20 fs/buffer.c:3184
 ext4_write_inode+0x216/0x330 fs/ext4/inode.c:5165
 write_inode+0x8e/0x250 fs/fs-writeback.c:1320
 __writeback_single_inode+0x31a/0x600 fs/fs-writeback.c:1516
 writeback_single_inode+0x11f/0x580 fs/fs-writeback.c:1570
 sync_inode fs/fs-writeback.c:2605 [inline]
 sync_inode_metadata+0x52/0x70 fs/fs-writeback.c:2625
 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline]
 ext4_sync_file+0x335/0x6e0 fs/ext4/fsync.c:170
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2747 [inline]
 ext4_buffered_write_iter+0x369/0x3b0 fs/ext4/file.c:276
 ext4_file_write_iter+0x768/0x1060 include/linux/fs.h:784
 call_write_iter include/linux/fs.h:1882 [inline]
 do_iter_readv_writev+0x32e/0x3d0 fs/read_write.c:713
 do_iter_write+0x112/0x4b0 fs/read_write.c:1018
 vfs_iter_write+0x4c/0x70 fs/read_write.c:1059
 iter_file_splice_write+0x41a/0x770 fs/splice.c:750
 do_splice_from fs/splice.c:846 [inline]
 direct_splice_actor+0x95/0x160 fs/splice.c:1016
 splice_direct_to_actor+0x365/0x660 fs/splice.c:971
 do_splice_direct+0xf2/0x170 fs/splice.c:1059
 do_sendfile+0x56a/0xba0 fs/read_write.c:1540
 __do_sys_sendfile64 fs/read_write.c:1595 [inline]
 __se_sys_sendfile64 fs/read_write.c:1587 [inline]
 __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1587
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12060 Comm: syz-executor.1 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (67):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Maintainers
ci2-upstream-kcsan-gce	2020/09/22 00:17	upstream	98477740	9e1fa68e	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/21 08:05	upstream	ba4f184e	c81d99c8	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/20 04:23	upstream	325d0eab	53ce8104	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/19 17:49	upstream	eb5f95f1	53ce8104	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/17 23:36	upstream	4cbffc46	8247808b	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/17 11:47	upstream	5925fa68	8247808b	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/16 22:53	upstream	5925fa68	77507d02	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/16 20:36	upstream	5925fa68	77507d02	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/15 20:02	upstream	fc4f28bb	18d7d030	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/15 10:34	upstream	fc4f28bb	9e681632	.config	log	report	info	axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/13 15:06	upstream	ef2e9a56	455eff3c	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/11 04:25	upstream	581cb3a2	ac7ca78e	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/07 03:27	upstream	a8205e31	abf9ba4f	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/06 10:24	upstream	dd9fb9bb	abf9ba4f	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/04 22:27	upstream	c70672d8	abf9ba4f	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/03 18:50	upstream	e28f0104	abf9ba4f	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/03 13:40	upstream	fc3abb53	abf9ba4f	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/09/01 11:12	upstream	b51594df	d5a3ae1f	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/29 04:58	upstream	96d454cd	d5a3ae1f	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/26 20:16	upstream	2ac69819	318430cb	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/26 00:06	upstream	abb3438d	344da168	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/24 14:45	upstream	d012a719	67b599d1	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/23 18:22	upstream	c3d8f220	a6d5f3ad	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/21 20:26	upstream	cd02217a	6436ce4b	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/21 13:27	upstream	da2968ff	1d75fe45	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/20 19:25	upstream	7eac66d0	70160577	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/20 15:19	upstream	7eac66d0	ed282a3a	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/13 19:33	upstream	fb893de3	ee7cb8b6	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/12 18:21	upstream	fb893de3	0d7bd2e0	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/11 18:25	upstream	00e4db51	5d3ebca9	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/10 19:48	upstream	fc80c51f	7adc7b65	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/09 15:33	upstream	06a81c1c	70301872	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/09 03:36	upstream	06a81c1c	f721e4a0	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/08 22:49	upstream	449dc8c9	01975a06	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/07 00:18	upstream	d6efb3ac	cb436c69	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/06 11:55	upstream	47ec5303	4ca1c0ea	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/04 22:43	upstream	c0842fbc	02034dac	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/03 18:45	upstream	bcf87687	96dd3623	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/03 18:25	upstream	bcf87687	96dd3623	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/02 07:27	upstream	ac3a0c84	96dd3623	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/01 23:28	upstream	d52daa86	8df85ed9	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/08/01 03:07	upstream	7dc6fd0f	8df85ed9	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/31 15:03	upstream	d8b9faec	8df85ed9	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/30 09:07	upstream	83bdc727	233283a1	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/28 22:27	upstream	6ba1b005	cb93dc6a	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/27 14:47	upstream	92ed3019	cb93dc6a	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/26 20:52	upstream	1ada9010	51265195	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/26 10:56	upstream	04300d66	51265195	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/24 12:17	upstream	f37e99ac	554af388	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/24 11:52	upstream	f37e99ac	554af388	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/24 10:18	upstream	f37e99ac	70c104a1	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/23 00:00	upstream	8c26c87b	128cd85f	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/21 14:56	upstream	4fa640dc	e562dd8a	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/19 03:35	upstream	6cf7ccba	9c812472	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/18 02:11	upstream	88825726	9c812472	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/11 23:54	upstream	1df0d896	7ba05d2d	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/09 23:43	upstream	2a89b99f	edf162e8	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/09 09:57	upstream	0bddd227	bc238812	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/07 17:19	upstream	bfe91da2	42723355	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/06 21:35	upstream	5c82ec00	ef278c73	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/05 20:56	upstream	45a5ac7a	22f87567	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/05 13:02	upstream	35e884f8	22f87567	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/07/02 03:10	upstream	edb543cf	bed10395	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/06/29 10:47	upstream	9ebcfadb	3ff434cc	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/06/26 12:56	upstream	4a21185c	b202c7a8	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/06/26 03:01	upstream	4a21185c	aea82c00	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci2-upstream-kcsan-gce	2020/06/24 10:14	upstream	3e08a952	bbad15ae	.config	log	report		axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org