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BUG: KCSAN: data-race in dd_has_work / dd_insert_request

write to 0xffff8881034d5c88 of 8 bytes by task 8691 on cpu 1:
 __list_add include/linux/list.h:72 [inline]
 list_add_tail include/linux/list.h:102 [inline]
 dd_insert_request+0x438/0x570 block/mq-deadline.c:759
 dd_insert_requests+0xfc/0x140 block/mq-deadline.c:778
 blk_mq_sched_insert_request+0x203/0x220 block/blk-mq-sched.c:449
 blk_mq_submit_bio+0xba1/0xe40 block/blk-mq.c:2853
 __submit_bio+0x130/0x330 block/blk-core.c:662
 __submit_bio_noacct_mq block/blk-core.c:739 [inline]
 submit_bio_noacct_nocheck+0x3cb/0x480 block/blk-core.c:756
 submit_bio_noacct+0x6c4/0x820 block/blk-core.c:863
 submit_bio+0x139/0x150
 submit_bh_wbc+0x2a8/0x2f0 fs/buffer.c:3045
 submit_bh+0x1e/0x30 fs/buffer.c:3051
 __ext4_read_bh fs/ext4/super.c:174 [inline]
 ext4_read_bh+0xc7/0x130 fs/ext4/super.c:198
 mext_page_mkuptodate+0x43a/0x760 fs/ext4/move_extent.c:218
 move_extent_per_page+0x37d/0xd10 fs/ext4/move_extent.c:348
 ext4_move_extents+0x4b6/0x610 fs/ext4/move_extent.c:672
 __ext4_ioctl fs/ext4/ioctl.c:1285 [inline]
 ext4_ioctl+0x14fa/0x20a0 fs/ext4/ioctl.c:1578
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881034d5c88 of 8 bytes by task 9 on cpu 0:
 list_empty_careful include/linux/list.h:329 [inline]
 dd_has_work_for_prio block/mq-deadline.c:837 [inline]
 dd_has_work+0x144/0x260 block/mq-deadline.c:847
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:109 [inline]
 blk_mq_do_dispatch_sched+0x148/0x780 block/blk-mq-sched.c:187
 __blk_mq_sched_dispatch_requests+0x1ca/0x270
 blk_mq_sched_dispatch_requests+0x8f/0xf0 block/blk-mq-sched.c:339
 __blk_mq_run_hw_queue+0x7e/0x100 block/blk-mq.c:1974
 blk_mq_run_work_fn+0x3d/0x50 block/blk-mq.c:2312
 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289
 worker_thread+0x618/0xa70 kernel/workqueue.c:2436
 kthread+0x1a9/0x1e0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

value changed: 0xffff8881034d5c80 -> 0xffff888103588c08

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 9 Comm: kworker/0:1H Not tainted 5.18.0-rc7-syzkaller-00164-g6c3f5bec9b40-dirty #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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