================================================================== BUG: KCSAN: data-race in blk_mq_dispatch_rq_list / blk_mq_do_dispatch_sched write to 0xffff88810280b8f8 of 4 bytes by task 9 on cpu 0: blk_mq_update_dispatch_busy block/blk-mq.c:1758 [inline] blk_mq_dispatch_rq_list+0x1131/0x1250 block/blk-mq.c:1998 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:173 [inline] blk_mq_do_dispatch_sched+0x49d/0x7f0 block/blk-mq-sched.c:187 __blk_mq_sched_dispatch_requests+0x1cd/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:2020 blk_mq_run_work_fn+0x3d/0x50 block/blk-mq.c:2319 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 arch/x86/entry/entry_64.S:306 read to 0xffff88810280b8f8 of 4 bytes by task 42 on cpu 1: __blk_mq_do_dispatch_sched block/blk-mq-sched.c:100 [inline] blk_mq_do_dispatch_sched+0xc9/0x7f0 block/blk-mq-sched.c:187 __blk_mq_sched_dispatch_requests+0x1cd/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:2020 __blk_mq_delay_run_hw_queue+0x15b/0x370 block/blk-mq.c:2096 blk_mq_run_hw_queue+0x180/0x320 block/blk-mq.c:2144 blk_mq_run_hw_queues+0x180/0x200 block/blk-mq.c:2192 scsi_kick_queue drivers/scsi/scsi_lib.c:307 [inline] scsi_starved_list_run drivers/scsi/scsi_lib.c:434 [inline] scsi_run_queue+0x599/0x6b0 drivers/scsi/scsi_lib.c:457 scsi_requeue_run_queue+0x21/0x30 drivers/scsi/scsi_lib.c:469 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 arch/x86/entry/entry_64.S:306 value changed: 0x00000007 -> 0x00000008 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 42 Comm: kworker/1:1H Not tainted 6.0.0-rc7-syzkaller-00250-ga962b54e162c-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: kblockd scsi_requeue_run_queue ==================================================================