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BUG: KCSAN: data-race in __blk_mq_requeue_request / bt_tags_for_each

write to 0xffff88810326e6e0 of 4 bytes by task 74 on cpu 0:
 __blk_mq_requeue_request+0x9f/0x2b0
 blk_mq_dispatch_rq_list+0xd47/0x1390
 __blk_mq_sched_dispatch_requests+0x1ab/0x260
 blk_mq_sched_dispatch_requests+0x93/0x100
 __blk_mq_run_hw_queue+0x8b/0x150
 blk_mq_run_work_fn+0x41/0x50
 process_one_work+0x3e6/0x750
 worker_thread+0x5ef/0xa10
 kthread+0x1ac/0x1e0
 ret_from_fork+0x1f/0x30

read to 0xffff88810326e6e0 of 4 bytes by task 29257 on cpu 1:
 bt_tags_for_each+0x2e2/0x500
 blk_mq_tagset_busy_iter+0x114/0x150
 scsi_host_busy+0x4f/0x80
 scsi_queue_rq+0x30a/0x1990
 blk_mq_dispatch_rq_list+0x521/0x1390
 __blk_mq_sched_dispatch_requests+0x1ab/0x260
 blk_mq_sched_dispatch_requests+0x93/0x100
 __blk_mq_run_hw_queue+0x8b/0x150
 __blk_mq_delay_run_hw_queue+0xb3/0x2f0
 blk_mq_run_hw_queue+0x1c2/0x350
 blk_mq_get_tag+0x479/0x590
 __blk_mq_alloc_requests+0x5a8/0x6d0
 blk_mq_submit_bio+0x4ad/0xea0
 __submit_bio+0xd2/0x150
 submit_bio_noacct_nocheck+0x41c/0x480
 submit_bio_noacct+0x7f1/0xa50
 submit_bio+0x101/0x110
 ext4_bio_write_page+0x88f/0xf10
 ext4_do_writepages+0x138c/0x2140
 ext4_writepages+0x127/0x250
 do_writepages+0x1c7/0x330
 filemap_fdatawrite_wbc+0xdb/0xf0
 filemap_flush+0x95/0xc0
 ext4_alloc_da_blocks+0x50/0x130
 ext4_release_file+0x5f/0x1c0
 __fput+0x245/0x570
 ____fput+0x15/0x20
 task_work_run+0x123/0x160
 do_exit+0x5a6/0x1690
 do_group_exit+0x101/0x150
 get_signal+0xea9/0xfe0
 arch_do_signal_or_restart+0x89/0x2b0
 exit_to_user_mode_loop+0x6d/0xe0
 exit_to_user_mode_prepare+0x6a/0xa0
 irqentry_exit_to_user_mode+0x9/0x20
 irqentry_exit+0x12/0x40
 asm_exc_page_fault+0x26/0x30

value changed: 0x000015a7 -> 0x000015a9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 29257 Comm: syz-executor.3 Not tainted 6.2.0-rc7-syzkaller-00018-g0983f6bf2bfc-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
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