================================================================== BUG: KCSAN: data-race in __blk_mq_sched_dispatch_requests / blk_mq_request_bypass_insert write to 0xffff888101dec010 of 8 bytes by task 239 on cpu 1: __list_add include/linux/list.h:72 [inline] list_add include/linux/list.h:88 [inline] blk_mq_request_bypass_insert+0x6a/0x130 block/blk-mq.c:2163 blk_mq_sched_insert_request+0xfd/0x220 block/blk-mq-sched.c:460 blk_mq_requeue_work+0x37b/0x3e0 block/blk-mq.c:1117 process_one_work+0x3fc/0x980 kernel/workqueue.c:2298 worker_thread+0x616/0xa70 kernel/workqueue.c:2445 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 read to 0xffff888101dec010 of 8 bytes by task 39 on cpu 0: list_empty_careful include/linux/list.h:321 [inline] __blk_mq_sched_dispatch_requests+0x80/0x270 block/blk-mq-sched.c:303 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:358 __blk_mq_run_hw_queue+0xc1/0x140 block/blk-mq.c:1784 blk_mq_run_work_fn+0x3d/0x50 block/blk-mq.c:2116 process_one_work+0x3fc/0x980 kernel/workqueue.c:2298 worker_thread+0x616/0xa70 kernel/workqueue.c:2445 kthread+0x2c7/0x2e0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 value changed: 0xffff888101dec008 -> 0xffff888101eb3448 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 39 Comm: kworker/0:1H Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: kblockd blk_mq_run_work_fn ==================================================================