------------[ cut here ]------------ WARNING: CPU: 0 PID: 16059 at kernel/workqueue.c:4442 destroy_workqueue+0x5bc/0x660 kernel/workqueue.c:4443 Modules linked in: CPU: 0 PID: 16059 Comm: syz-executor.0 Not tainted 6.1.0-rc2-syzkaller-154433-g247f34f7b803 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : destroy_workqueue+0x5bc/0x660 kernel/workqueue.c:4443 lr : pwq_busy kernel/workqueue.c:4389 [inline] lr : destroy_workqueue+0x528/0x660 kernel/workqueue.c:4442 sp : ffff80001402bc90 x29: ffff80001402bc90 x28: 00000000000e001b x27: 0000000000002000 x26: ffff0000c6227888 x25: ffff00011d1fe010 x24: ffff0000c5f7dec0 x23: ffff00011d1f5e78 x22: 0000000000000001 x21: ffff00011d1f5e00 x20: ffff00012b80e820 x19: ffff00012b80e800 x18: 000000000000025b x17: ffff80000c0cd83c x16: 0000000000000292 x15: 0000000000000037 x14: 00000000003d98c0 x13: 0000000000000130 x12: 0000000000000000 x11: ff80800008134218 x10: 0000000000000000 x9 : ffff800008134218 x8 : ffff00011c154ec0 x7 : 00000000000107c0 x6 : ffff800008133db4 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff00012b80e960 x1 : ffff80000cbb87d7 x0 : ffff80000cbb87b2 Call trace: destroy_workqueue+0x5bc/0x660 kernel/workqueue.c:4443 nci_unregister_device+0x44/0x100 net/nfc/nci/core.c:1293 virtual_ncidev_close+0x70/0xb0 drivers/nfc/virtual_ncidev.c:163 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 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+0x9c/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x928/0x16ec kernel/fork.c:2197 softirqs last enabled at (0): [] copy_process+0x938/0x16ec kernel/fork.c:2198 softirqs last disabled at (0): [<0000000000000000>] 0x0 ---[ 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 pending: nci_cmd_work ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: nci_cmd_timer+0x0/0x40 WARNING: CPU: 0 PID: 16059 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 0 PID: 16059 at lib/debugobjects.c:505 __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] WARNING: CPU: 0 PID: 16059 at lib/debugobjects.c:505 debug_check_no_obj_freed+0x214/0x2b0 lib/debugobjects.c:1020 Modules linked in: CPU: 0 PID: 16059 Comm: syz-executor.0 Tainted: G W 6.1.0-rc2-syzkaller-154433-g247f34f7b803 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : debug_print_object lib/debugobjects.c:502 [inline] pc : __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] pc : debug_check_no_obj_freed+0x214/0x2b0 lib/debugobjects.c:1020 lr : debug_print_object lib/debugobjects.c:502 [inline] lr : __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] lr : debug_check_no_obj_freed+0x214/0x2b0 lib/debugobjects.c:1020 sp : ffff80001402bbe0 x29: ffff80001402bc00 x28: ffff00011e7d5000 x27: ffff00011e7d5800 x26: ffff00011f1d5c08 x25: ffff00011eefc320 x24: ffff80000c0cf7d0 x23: ffff00011e7d5050 x22: ffff80000c0cf7d0 x21: 0000000000000001 x20: dead000000000100 x19: ffff00011e7d5000 x18: 0000000000000374 x17: 6e6968207473696c x16: 5f72656d6974203a x15: 6570797420746365 x14: 6a626f2029302065 x13: 205d393530363154 x12: 5b5d323135383234 x11: ff808000081c650c x10: 0000000000000000 x9 : 5c56132ed8881500 x8 : 5c56132ed8881500 x7 : 545b5d3231353832 x6 : ffff80000c0903b4 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000059 Call trace: debug_print_object lib/debugobjects.c:502 [inline] __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] debug_check_no_obj_freed+0x214/0x2b0 lib/debugobjects.c:1020 slab_free_hook mm/slub.c:1699 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x12c/0x314 mm/slub.c:3674 kfree+0x9c/0x118 mm/slab_common.c:1007 nci_free_device+0x34/0x44 net/nfc/nci/core.c:1205 virtual_ncidev_close+0x78/0xb0 drivers/nfc/virtual_ncidev.c:164 __fput+0x198/0x3e4 fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1f0 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+0x9c/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 irq event stamp: 0 hardirqs last enabled at (0): [<0000000000000000>] 0x0 hardirqs last disabled at (0): [] copy_process+0x928/0x16ec kernel/fork.c:2197 softirqs last enabled at (0): [] copy_process+0x938/0x16ec kernel/fork.c:2198 softirqs last disabled at (0): [<0000000000000000>] 0x0 ---[ end trace 0000000000000000 ]---