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BUG: KCSAN: data-race in blk_mq_dispatch_rq_list / blk_mq_dispatch_rq_list

read to 0xffff8881015ec168 of 8 bytes by task 19999 on cpu 0:
 blk_mq_dispatch_rq_list+0xab7/0x1070 block/blk-mq.c:1397
 __blk_mq_sched_dispatch_requests+0x1d5/0x290 block/blk-mq-sched.c:327
 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:360
 __blk_mq_run_hw_queue+0xbc/0x140 block/blk-mq.c:1492
 __blk_mq_delay_run_hw_queue+0x163/0x2f0 block/blk-mq.c:1569
 blk_mq_run_hw_queue+0x22c/0x250 block/blk-mq.c:1622
 blk_mq_sched_insert_request+0x11d/0x250 block/blk-mq-sched.c:479
 blk_execute_rq_nowait+0xee/0x130 block/blk-exec.c:62
 sg_common_write+0x8df/0x1480 drivers/scsi/sg.c:835
 sg_new_write+0xb32/0xcc0 drivers/scsi/sg.c:773
 sg_ioctl_common drivers/scsi/sg.c:938 [inline]
 sg_ioctl+0xf08/0x18e0 drivers/scsi/sg.c:1164
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

write to 0xffff8881015ec168 of 8 bytes by task 52 on cpu 1:
 blk_mq_dispatch_rq_list+0xaca/0x1070 block/blk-mq.c:1397
 __blk_mq_sched_dispatch_requests+0x1d5/0x290 block/blk-mq-sched.c:327
 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:360
 __blk_mq_run_hw_queue+0xbc/0x140 block/blk-mq.c:1492
 __blk_mq_delay_run_hw_queue+0x163/0x2f0 block/blk-mq.c:1569
 blk_mq_run_hw_queue+0x22c/0x250 block/blk-mq.c:1622
 blk_mq_run_hw_queues+0x1d1/0x230 block/blk-mq.c:1685
 blk_mq_requeue_work+0x3ff/0x440 block/blk-mq.c:805
 process_one_work+0x402/0x910 kernel/workqueue.c:2297
 worker_thread+0x636/0xae0 kernel/workqueue.c:2444
 kthread+0x262/0x280 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30

value changed: 0x00000000000024d7 -> 0x00000000000024d8

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 52 Comm: kworker/1:1H Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: kblockd blk_mq_requeue_work
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