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BUG: KCSAN: data-race in dd_has_work / dd_insert_request

write to 0xffff88810103a318 of 8 bytes by task 9785 on cpu 1:
 __list_add include/linux/list.h:70 [inline]
 list_add_tail include/linux/list.h:100 [inline]
 dd_insert_request+0x27a/0x430 block/mq-deadline.c:521
 dd_insert_requests+0x10c/0x150 block/mq-deadline.c:537
 blk_mq_sched_insert_request+0x22c/0x280 block/blk-mq-sched.c:452
 blk_mq_submit_bio+0x8b1/0x1060 block/blk-mq.c:2243
 __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
 submit_bh_wbc+0x36b/0x3b0 fs/buffer.c:3055
 submit_bh+0x21/0x30 fs/buffer.c:3061
 ntfs_read_block fs/ntfs/aops.c:345 [inline]
 ntfs_readpage+0x11e6/0x1680 fs/ntfs/aops.c:435
 do_read_cache_page+0x6b1/0x880 mm/filemap.c:3263
 read_cache_page+0x36/0x40 mm/filemap.c:3362
 read_mapping_page include/linux/pagemap.h:500 [inline]
 ntfs_map_page fs/ntfs/aops.h:75 [inline]
 load_and_init_upcase+0x1eb/0x870 fs/ntfs/super.c:1678
 load_system_files fs/ntfs/super.c:1810 [inline]
 ntfs_fill_super+0x1646/0x33e0 fs/ntfs/super.c:2893
 mount_bdev+0x1e8/0x290 fs/super.c:1367
 ntfs_mount+0x2d/0x40 fs/ntfs/super.c:3050
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:592
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497
 do_new_mount fs/namespace.c:2903 [inline]
 path_mount+0x11b9/0x1c00 fs/namespace.c:3233
 do_mount fs/namespace.c:3246 [inline]
 __do_sys_mount fs/namespace.c:3454 [inline]
 __se_sys_mount+0x23d/0x2e0 fs/namespace.c:3431
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3431
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88810103a318 of 8 bytes by task 2162 on cpu 0:
 list_empty_careful include/linux/list.h:319 [inline]
 dd_has_work+0x98/0xe0 block/mq-deadline.c:585
 __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+0x1fd/0x2a0 block/blk-mq-sched.c:310
 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:341
 __blk_mq_run_hw_queue+0xc1/0x140 block/blk-mq.c:1488
 blk_mq_run_work_fn+0x3d/0x50 block/blk-mq.c:1820
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
 worker_thread+0x616/0xa70 kernel/workqueue.c:2421
 kthread+0x20b/0x230 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 2162 Comm: kworker/0:1H Not tainted 5.12.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: kblockd blk_mq_run_work_fn

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