------------[ cut here ]------------ WARNING: CPU: 0 PID: 29122 at kernel/workqueue.c:4442 pwq_busy kernel/workqueue.c:4394 [inline] WARNING: CPU: 0 PID: 29122 at kernel/workqueue.c:4442 destroy_workqueue+0x218/0x650 kernel/workqueue.c:4442 Modules linked in: CPU: 0 PID: 29122 Comm: syz-executor.0 Not tainted 6.1.0-rc5-syzkaller-00008-ge01d50cbd6ee #0 Hardware name: linux,dummy-virt (DT) pstate: 100000c5 (nzcV daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : destroy_workqueue+0x218/0x650 kernel/workqueue.c:4442 lr : destroy_workqueue+0x13c/0x650 kernel/workqueue.c:4441 sp : ffff8000125879d0 x29: ffff8000125879d0 x28: 1fffe00006c3f380 x27: ffff0000361f9c00 x26: dfff800000000000 x25: ffff80000e093ec0 x24: ffff00000a5c2820 x23: 0000000000000003 x22: ffff80000e093100 x21: ffff00000a5c2800 x20: 0000000000000003 x19: ffff0000361f9c28 x18: ffff00006a985c00 x17: ffff80005ca0e000 x16: 1ffff00001c3ab39 x15: ffff00006a985bc8 x14: 1ffff000024b0f04 x13: 0000000000000000 x12: ffff7000024b0f2f x11: 1ffff000024b0f2e x10: ffff7000024b0f2e x9 : dfff800000000000 x8 : ffff800012587973 x7 : 0000000000000004 x6 : 0000000000000001 x5 : ffff800012587970 x4 : 0000000000000000 x3 : 1fffe0000d530601 x2 : 1fffe00006c3f384 x1 : 0000000000000007 x0 : 0000000000000001 Call trace: pwq_busy kernel/workqueue.c:4394 [inline] destroy_workqueue+0x218/0x650 kernel/workqueue.c:4442 nci_unregister_device+0x60/0x280 net/nfc/nci/core.c:1293 virtual_ncidev_close+0x70/0x90 drivers/nfc/virtual_ncidev.c:166 __fput+0x1ac/0x860 fs/file_table.c:320 ____fput+0x10/0x1c fs/file_table.c:348 task_work_run+0x12c/0x220 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x920/0x2840 arch/arm64/kernel/signal.c:1127 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x11c/0x140 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0xb8/0xc0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 irq event stamp: 10910 hardirqs last enabled at (10909): [] kasan_quarantine_put+0x108/0x254 mm/kasan/quarantine.c:242 hardirqs last disabled at (10910): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (10910): [] _raw_spin_lock_irq+0x8c/0x90 kernel/locking/spinlock.c:170 softirqs last enabled at (10902): [] _stext+0x9d4/0x107c softirqs last disabled at (10893): [] ____do_softirq+0x10/0x20 arch/arm64/kernel/irq.c:79 ---[ end trace 0000000000000000 ]--- destroy_workqueue: nfc2_nci_cmd_wq has the following busy pwq pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=3 in-flight: 22906:nci_cmd_work