================================ WARNING: inconsistent lock state 5.11.0-syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. syz-executor.0/8303 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff00003b4080a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] ffff00003b4080a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: sco_sock_timeout+0x2c/0x190 net/bluetooth/sco.c:83 {SOFTIRQ-ON-W} state was registered at: mark_usage kernel/locking/lockdep.c:4324 [inline] __lock_acquire+0x560/0x5670 kernel/locking/lockdep.c:4786 lock_acquire.part.0+0x230/0x740 kernel/locking/lockdep.c:5442 lock_acquire+0x90/0xb4 kernel/locking/lockdep.c:5415 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x8c/0x120 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] sco_conn_del+0xbc/0x1f4 net/bluetooth/sco.c:176 sco_disconn_cfm net/bluetooth/sco.c:1189 [inline] sco_disconn_cfm+0x64/0xac net/bluetooth/sco.c:1182 hci_disconn_cfm include/net/bluetooth/hci_core.h:1462 [inline] hci_conn_hash_flush+0xf4/0x1f4 net/bluetooth/hci_conn.c:1565 hci_dev_do_close+0x434/0xbb0 net/bluetooth/hci_core.c:1776 hci_unregister_dev+0x1c8/0xa70 net/bluetooth/hci_core.c:3872 vhci_release+0x64/0xd0 drivers/bluetooth/hci_vhci.c:340 __fput+0x1a0/0x6b0 fs/file_table.c:280 ____fput+0x10/0x20 fs/file_table.c:313 task_work_run+0xd4/0x20c kernel/task_work.c:140 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0x940/0x2330 kernel/exit.c:825 do_group_exit+0xcc/0x23c kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __arm64_sys_exit_group+0x3c/0x44 kernel/exit.c:931 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall arch/arm64/kernel/syscall.c:49 [inline] el0_svc_common.constprop.0+0x110/0x3c0 arch/arm64/kernel/syscall.c:159 do_el0_svc_compat+0x40/0x80 arch/arm64/kernel/syscall.c:204 el0_svc_compat+0x20/0x30 arch/arm64/kernel/entry-common.c:442 el0_sync_compat_handler+0x90/0x140 arch/arm64/kernel/entry-common.c:451 el0_sync_compat+0x178/0x180 arch/arm64/kernel/entry.S:708 irq event stamp: 283500 hardirqs last enabled at (283500): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (283500): [] _raw_spin_unlock_irq+0x78/0x154 kernel/locking/spinlock.c:199 hardirqs last disabled at (283499): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (283499): [] _raw_spin_lock_irq+0xf8/0x14c kernel/locking/spinlock.c:167 softirqs last enabled at (283400): [] _stext+0x9f0/0x10cc softirqs last disabled at (283491): [] do_softirq_own_stack include/linux/interrupt.h:577 [inline] softirqs last disabled at (283491): [] invoke_softirq kernel/softirq.c:226 [inline] softirqs last disabled at (283491): [] __irq_exit_rcu+0x46c/0x510 kernel/softirq.c:420 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(slock-AF_BLUETOOTH-BTPROTO_SCO); lock(slock-AF_BLUETOOTH-BTPROTO_SCO); *** DEADLOCK *** 1 lock held by syz-executor.0/8303: #0: ffff00006a2b9e50 ((&sk->sk_timer)#2){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:35 [inline] #0: ffff00006a2b9e50 ((&sk->sk_timer)#2){+.-.}-{0:0}, at: call_timer_fn+0xf8/0x9f0 kernel/time/timer.c:1407 stack backtrace: CPU: 1 PID: 8303 Comm: syz-executor.0 Not tainted 5.11.0-syzkaller #0 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x0/0x3e0 arch/arm64/include/asm/pointer_auth.h:76 show_stack+0x18/0x70 arch/arm64/kernel/stacktrace.c:196 __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x110/0x188 lib/dump_stack.c:120 print_usage_bug.part.0+0x4c4/0x4e8 kernel/locking/lockdep.c:3740 print_usage_bug kernel/locking/lockdep.c:3710 [inline] valid_state kernel/locking/lockdep.c:3751 [inline] mark_lock_irq kernel/locking/lockdep.c:3960 [inline] mark_lock+0x13cc/0x1980 kernel/locking/lockdep.c:4411 mark_usage kernel/locking/lockdep.c:4306 [inline] __lock_acquire+0x11c8/0x5670 kernel/locking/lockdep.c:4786 lock_acquire.part.0+0x230/0x740 kernel/locking/lockdep.c:5442 lock_acquire+0x90/0xb4 kernel/locking/lockdep.c:5415 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x8c/0x120 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] sco_sock_timeout+0x2c/0x190 net/bluetooth/sco.c:83 call_timer_fn+0x1d4/0x9f0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x494/0x690 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xa4/0x1a0 kernel/time/timer.c:1744 _stext+0x400/0x10cc do_softirq_own_stack include/linux/interrupt.h:577 [inline] invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu+0x46c/0x510 kernel/softirq.c:420 irq_exit+0x14/0x84 kernel/softirq.c:444 __handle_domain_irq+0x120/0x1f0 kernel/irq/irqdesc.c:692 handle_domain_irq include/linux/irqdesc.h:176 [inline] gic_handle_irq+0x5c/0x1b0 drivers/irqchip/irq-gic.c:370 el1_irq+0xb4/0x180 arch/arm64/kernel/entry.S:669 local_daif_restore arch/arm64/include/asm/daifflags.h:117 [inline] do_notify_resume+0x160/0x25fc arch/arm64/kernel/signal.c:924 work_pending+0xc/0x35c