================================ WARNING: inconsistent lock state 5.14.0-rc7-syzkaller #0 Not tainted -------------------------------- inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage. syz-executor.1/25582 [HC0[0]:SC0[0]:HE1:SE1] takes: ffff888034a1a0a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: spin_lock include/linux/spinlock.h:354 [inline] ffff888034a1a0a0 (slock-AF_BLUETOOTH-BTPROTO_SCO){+.?.}-{2:2}, at: sco_conn_del+0x113/0x2a0 net/bluetooth/sco.c:176 {IN-SOFTIRQ-W} state was registered at: lock_acquire+0x182/0x4a0 kernel/locking/lockdep.c:5625 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] sco_sock_timeout+0x33/0x170 net/bluetooth/sco.c:83 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421 expire_timers kernel/time/timer.c:1466 [inline] __run_timers+0x703/0x8f0 kernel/time/timer.c:1734 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747 __do_softirq+0x372/0x783 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x21b/0x260 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 lock_is_held_type+0x129/0x180 arch/x86/include/asm/irqflags.h:45 lock_is_held include/linux/lockdep.h:283 [inline] ___might_sleep+0x99/0x6b0 kernel/sched/core.c:9100 inet_twsk_purge+0x105/0x890 net/ipv4/inet_timewait_sock.c:267 ops_exit_list net/core/net_namespace.c:178 [inline] setup_net+0x7c3/0x9d0 net/core/net_namespace.c:356 copy_net_ns+0x359/0x5c0 net/core/net_namespace.c:474 create_new_namespaces+0x4ce/0xa00 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x11e/0x180 kernel/nsproxy.c:226 ksys_unshare+0x57d/0xb50 kernel/fork.c:3002 __do_sys_unshare kernel/fork.c:3076 [inline] __se_sys_unshare kernel/fork.c:3074 [inline] __x64_sys_unshare+0x34/0x40 kernel/fork.c:3074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae irq event stamp: 12245 hardirqs last enabled at (12245): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (12245): [] _raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:199 hardirqs last disabled at (12244): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (12244): [] _raw_spin_lock_irq+0x89/0xf0 kernel/locking/spinlock.c:167 softirqs last enabled at (9952): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last enabled at (9952): [] __irq_exit_rcu+0x21b/0x260 kernel/softirq.c:636 softirqs last disabled at (9863): [] invoke_softirq kernel/softirq.c:432 [inline] softirqs last disabled at (9863): [] __irq_exit_rcu+0x21b/0x260 kernel/softirq.c:636 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 *** 4 locks held by syz-executor.1/25582: #0: ffffffff8d9d63a8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x14d/0x750 net/rfkill/core.c:1260 #1: ffff888016a98ff0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x4c/0x1010 net/bluetooth/hci_core.c:1728 #2: ffff888016a98078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x2c6/0x1010 net/bluetooth/hci_core.c:1765 #3: ffffffff8d8938a8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:1498 [inline] #3: ffffffff8d8938a8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xb8/0x240 net/bluetooth/hci_conn.c:1608 stack backtrace: CPU: 0 PID: 25582 Comm: syz-executor.1 Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1ae/0x29f lib/dump_stack.c:105 print_usage_bug+0xd5e/0x1210 kernel/locking/lockdep.c:3921 mark_lock_irq kernel/locking/lockdep.c:3933 [inline] mark_lock+0x1708/0x1eb0 kernel/locking/lockdep.c:4593 mark_usage kernel/locking/lockdep.c:4506 [inline] __lock_acquire+0xd71/0x6100 kernel/locking/lockdep.c:4969 lock_acquire+0x182/0x4a0 kernel/locking/lockdep.c:5625 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] sco_conn_del+0x113/0x2a0 net/bluetooth/sco.c:176 hci_disconn_cfm include/net/bluetooth/hci_core.h:1501 [inline] hci_conn_hash_flush+0x112/0x240 net/bluetooth/hci_conn.c:1608 hci_dev_do_close+0x905/0x1010 net/bluetooth/hci_core.c:1778 hci_rfkill_set_block+0x10f/0x180 net/bluetooth/hci_core.c:2226 rfkill_set_block+0x1f1/0x440 net/rfkill/core.c:344 rfkill_fop_write+0x594/0x750 net/rfkill/core.c:1268 vfs_write+0x289/0xc90 fs/read_write.c:603 ksys_write+0x171/0x2a0 fs/read_write.c:658 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f62603cf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffe4281500f R14: 00007f62603cf300 R15: 0000000000022000