------------[ cut here ]------------ WARNING: CPU: 0 PID: 3361 at kernel/workqueue.c:4442 destroy_workqueue+0x5bc/0x660 kernel/workqueue.c:4443 Modules linked in: CPU: 0 PID: 3361 Comm: syz-executor.1 Not tainted 6.1.0-rc6-syzkaller-32662-g6d464646530f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff80002260bc90 x29: ffff80002260bc90 x28: 00000000000e001b x27: 0000000000002000 x26: ffff0000c630f270 x25: ffff0000c7b88810 x24: ffff0000c4e50140 x23: ffff00010f33a478 x22: 0000000000000001 x21: ffff00010f33a400 x20: ffff00010b620c20 x19: ffff00010b620c00 x18: 0000000000000297 x17: ffff80000c0cd83c x16: ffff80000dbe6158 x15: ffff00010bb71a40 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff00010bb71a40 x11: ff80800008134a18 x10: 0000000000000000 x9 : ffff800008134a18 x8 : ffff00010bb71a40 x7 : ffff8000081345b4 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff00010b620d60 x1 : ffff80000cbb8bd7 x0 : ffff80000cbb8bb2 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:166 __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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 13182 hardirqs last enabled at (13181): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (13181): [] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194 hardirqs last disabled at (13182): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (13182): [] _raw_spin_lock_irq+0x34/0x9c kernel/locking/spinlock.c:170 softirqs last enabled at (12978): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (12976): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ 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: 15467:nci_cmd_work ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: nci_cmd_timer+0x0/0x40 WARNING: CPU: 1 PID: 3361 at lib/debugobjects.c:505 debug_print_object lib/debugobjects.c:502 [inline] WARNING: CPU: 1 PID: 3361 at lib/debugobjects.c:505 __debug_check_no_obj_freed lib/debugobjects.c:989 [inline] WARNING: CPU: 1 PID: 3361 at lib/debugobjects.c:505 debug_check_no_obj_freed+0x214/0x2b0 lib/debugobjects.c:1020 Modules linked in: CPU: 1 PID: 3361 Comm: syz-executor.1 Tainted: G W 6.1.0-rc6-syzkaller-32662-g6d464646530f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 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 : ffff80002260bbe0 x29: ffff80002260bc00 x28: ffff00010f02f000 x27: ffff00010f02f800 x26: ffff00010c255e10 x25: ffff00010ba65618 x24: ffff80000c0cf7d0 x23: ffff00010f02f050 x22: ffff80000c0cf7d0 x21: 0000000000000001 x20: dead000000000100 x19: ffff00010f02f000 x18: 0000000000000395 x17: 6e6968207473696c x16: ffff80000dbe6158 x15: ffff00010bb71a40 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff00010bb71a40 x11: ff808000081c4d40 x10: 0000000000000000 x9 : 635a5489390a9700 x8 : 635a5489390a9700 x7 : ffff80000c08b4f4 x6 : 0000000000000000 x5 : 0000000000000080 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:167 __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:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 irq event stamp: 13668 hardirqs last enabled at (13667): [] __up_console_sem+0xb0/0xfc kernel/printk/printk.c:261 hardirqs last disabled at (13668): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (13328): [] _stext+0x2e4/0x37c softirqs last disabled at (13185): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]---