================================================================== BUG: KCSAN: data-race in blk_mq_run_hw_queue / blk_mq_sched_insert_request read to 0xffff888129555c10 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] get_ctx kernel/kcsan/core.c:167 [inline] is_atomic kernel/kcsan/core.c:172 [inline] should_watch kernel/kcsan/core.c:203 [inline] check_access kernel/kcsan/core.c:458 [inline] __tsan_read4+0x71/0x100 kernel/kcsan/core.c:588 skip_emulated_instruction+0x38/0x1a0 arch/x86/kvm/vmx/vmx.c:1583 kvm_skip_emulated_instruction+0x70/0xd0 arch/x86/kvm/x86.c:6554 kvm_emulate_wbinvd+0x27/0x40 arch/x86/kvm/x86.c:5949 handle_wbinvd+0x1f/0x30 arch/x86/kvm/vmx/vmx.c:5010 vmx_handle_exit+0x1c2/0xdb0 arch/x86/kvm/vmx/vmx.c:5921 vcpu_enter_guest+0xc25/0x3860 arch/x86/kvm/x86.c:8290 vcpu_run arch/x86/kvm/x86.c:8354 [inline] kvm_arch_vcpu_ioctl_run+0x2a8/0xdf0 arch/x86/kvm/x86.c:8561 kvm_vcpu_ioctl+0x758/0xa30 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2847 vfs_ioctl fs/ioctl.c:47 [inline] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x84f/0xcf0 fs/ioctl.c:732 ksys_ioctl+0xbd/0xe0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x4c/0x60 fs/ioctl.c:754 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff888129555c10 of 8 bytes by task 2498 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: 2498 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 ==================================================================