================================ WARNING: inconsistent lock state 4.19.167-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. syz-executor104/2297 [HC0[0]:SC0[0]:HE1:SE1] takes: 0000000080de040c (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}, at: spin_lock include/linux/spinlock.h:329 [inline] 0000000080de040c (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}, at: sco_conn_del+0xe2/0x240 net/bluetooth/sco.c:175 {IN-SOFTIRQ-W} state was registered at: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] sco_sock_timeout+0x31/0x210 net/bluetooth/sco.c:82 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:545 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3929 alloc_set_pte+0x927/0x1a00 mm/memory.c:3588 filemap_map_pages+0xd66/0x11c0 mm/filemap.c:2700 do_fault_around mm/memory.c:3735 [inline] do_read_fault mm/memory.c:3769 [inline] do_fault mm/memory.c:3903 [inline] handle_pte_fault mm/memory.c:4134 [inline] __handle_mm_fault+0x2a8e/0x41c0 mm/memory.c:4258 handle_mm_fault+0x436/0xb10 mm/memory.c:4295 __do_page_fault+0x68e/0xd60 arch/x86/mm/fault.c:1412 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 irq event stamp: 1201 hardirqs last enabled at (1201): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (1201): [] _raw_spin_unlock_irq+0x24/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (1200): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (1200): [] _raw_spin_lock_irq+0x35/0x80 kernel/locking/spinlock.c:160 softirqs last enabled at (238): [] sco_sock_connect+0x5b0/0xa90 net/bluetooth/sco.c:584 softirqs last disabled at (236): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (236): [] release_sock+0x1b/0x1b0 net/core/sock.c:2879 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 *** 3 locks held by syz-executor104/2297: #0: 00000000da46d8a2 (&hdev->req_lock){+.+.}, at: hci_dev_do_close+0x196/0xf10 net/bluetooth/hci_core.c:1616 #1: 00000000d9a3f969 (&hdev->lock){+.+.}, at: hci_dev_do_close+0x2e0/0xf10 net/bluetooth/hci_core.c:1653 #2: 00000000d345c75b (hci_cb_list_lock){+.+.}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1258 [inline] #2: 00000000d345c75b (hci_cb_list_lock){+.+.}, at: hci_conn_hash_flush+0xda/0x260 net/bluetooth/hci_conn.c:1512 stack backtrace: CPU: 0 PID: 2297 Comm: syz-executor104 Not tainted 4.19.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2fe lib/dump_stack.c:118 print_usage_bug.cold+0x42e/0x570 kernel/locking/lockdep.c:2544 valid_state kernel/locking/lockdep.c:2557 [inline] mark_lock_irq kernel/locking/lockdep.c:2751 [inline] mark_lock+0xc70/0x1160 kernel/locking/lockdep.c:3131 mark_irqflags kernel/locking/lockdep.c:3027 [inline] __lock_acquire+0x6a8/0x3ff0 kernel/locking/lockdep.c:3372 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3907 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] sco_conn_del+0xe2/0x240 net/bluetooth/sco.c:175 sco_disconn_cfm+0x74/0xb0 net/bluetooth/sco.c:1133 hci_disconn_cfm include/net/bluetooth/hci_core.h:1261 [inline] hci_conn_hash_flush+0x127/0x260 net/bluetooth/hci_conn.c:1512 hci_dev_do_close+0x659/0xf10 net/bluetooth/hci_core.c:1666 hci_unregister_dev+0x18b/0x910 net/bluetooth/hci_core.c:3271 vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:354 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbed/0x2be0 kernel/exit.c:890 do_group_exit+0x125/0x310 kernel/exit.c:993 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4474d9 Code: e8 4c e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2106e8ecf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00000000006dcc28 RCX: 00000000004474d9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dcc28 RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c R13: 00007ffdccc5149f R14: 00007f2106e8f9c0 R15: 0000000000000064 Bluetooth: hci3: command 0x0405 tx timeout