================================================================== BUG: KCSAN: data-race in blk_mq_dispatch_rq_list / blk_mq_dispatch_rq_list write to 0xffff88810266e168 of 8 bytes by task 52 on cpu 1: blk_mq_dispatch_rq_list+0xadb/0x1080 block/blk-mq.c:1386 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:201 [inline] blk_mq_do_dispatch_sched+0x3b5/0x640 block/blk-mq-sched.c:214 __blk_mq_sched_dispatch_requests+0x1eb/0x290 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:360 __blk_mq_run_hw_queue+0xbc/0x140 block/blk-mq.c:1480 blk_mq_run_work_fn+0x3d/0x50 block/blk-mq.c:1812 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 read to 0xffff88810266e168 of 8 bytes by task 329 on cpu 0: blk_mq_dispatch_rq_list+0xac8/0x1080 block/blk-mq.c:1386 __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:1480 __blk_mq_delay_run_hw_queue+0x163/0x2f0 block/blk-mq.c:1557 blk_mq_run_hw_queue+0x22c/0x250 block/blk-mq.c:1610 blk_mq_run_hw_queues+0x1d1/0x230 block/blk-mq.c:1673 blk_mq_requeue_work+0x3ff/0x440 block/blk-mq.c:798 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: 0x000000000000807f -> 0x0000000000008080 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 329 Comm: kworker/0:1H Not tainted 5.15.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: kblockd blk_mq_requeue_work ==================================================================