================================================================== BUG: KCSAN: data-race in blk_mq_run_hw_queue / blk_mq_sched_insert_request read to 0xffff88812a8b6810 of 8 bytes by interrupt on cpu 1: list_empty_careful include/linux/list.h:287 [inline] blk_mq_hctx_has_pending block/blk-mq.c:69 [inline] blk_mq_run_hw_queue+0x10e/0x1c0 block/blk-mq.c:1469 blk_mq_run_hw_queues+0xac/0xf0 block/blk-mq.c:1486 scsi_end_request+0x342/0x360 drivers/scsi/scsi_lib.c:616 scsi_io_completion+0x11d/0xc80 drivers/scsi/scsi_lib.c:960 scsi_finish_command+0x283/0x380 drivers/scsi/scsi.c:228 scsi_softirq_done+0x259/0x280 drivers/scsi/scsi_lib.c:1476 blk_done_softirq+0x1eb/0x250 block/blk-softirq.c:37 __do_softirq+0x115/0x33f kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0xbb/0xe0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] do_IRQ+0x81/0x130 arch/x86/kernel/irq.c:263 ret_from_intr+0x0/0x21 preempt_count arch/x86/include/asm/preempt.h:26 [inline] __local_bh_enable_ip+0x21/0x80 kernel/softirq.c:184 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x3f/0x50 kernel/locking/spinlock.c:207 spin_unlock_bh include/linux/spinlock.h:383 [inline] batadv_nc_purge_paths+0x1ff/0x260 net/batman-adv/network-coding.c:470 batadv_nc_worker+0x194/0x390 net/batman-adv/network-coding.c:719 process_one_work+0x3d4/0x890 kernel/workqueue.c:2264 worker_thread+0xa0/0x800 kernel/workqueue.c:2410 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 write to 0xffff88812a8b6810 of 8 bytes by task 2500 on cpu 0: __list_add include/linux/list.h:63 [inline] list_add include/linux/list.h:79 [inline] blk_mq_sched_bypass_insert block/blk-mq-sched.c:367 [inline] blk_mq_sched_insert_request+0x2fd/0x3f0 block/blk-mq-sched.c:394 blk_mq_requeue_work+0x370/0x460 block/blk-mq.c:738 process_one_work+0x3d4/0x890 kernel/workqueue.c:2264 worker_thread+0xa0/0x800 kernel/workqueue.c:2410 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 2500 Comm: kworker/0:1H Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: kblockd blk_mq_requeue_work ==================================================================