watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:4109] Modules linked in: irq event stamp: 27066 hardirqs last enabled at (27065): [] kvm_wait arch/x86/kernel/kvm.c:600 [inline] hardirqs last enabled at (27065): [] kvm_wait+0x14b/0x240 arch/x86/kernel/kvm.c:580 hardirqs last disabled at (27066): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (18384): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (18291): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (18291): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 4109 Comm: syz-executor.4 Not tainted 4.14.272-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809b1b8180 task.stack: ffff88809a330000 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 RSP: 0018:ffff88809a337b68 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e12f4 RBX: ffffffff89ddaf6c RCX: 1ffff11013637154 RDX: dffffc0000000000 RSI: ffff88809b1b8a80 RDI: ffff88809b1b8a04 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 R13: dffffc0000000000 R14: ffffffff89ddaf6d R15: ffffed10174869e8 FS: 000055555578f400(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fa26000 CR3: 000000008fff7000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] kvm_wait arch/x86/kernel/kvm.c:600 [inline] kvm_wait+0x179/0x240 arch/x86/kernel/kvm.c:580 pv_wait arch/x86/include/asm/paravirt.h:679 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:447 [inline] __pv_queued_spin_lock_slowpath+0x722/0x910 kernel/locking/qspinlock.c:465 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:669 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:52 [inline] queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] queued_read_lock_slowpath+0x150/0x190 kernel/locking/qrwlock.c:90 hci_send_to_channel+0x3c/0x200 net/bluetooth/hci_sock.c:272 hci_send_monitor_ctrl_event+0x3dd/0x500 net/bluetooth/hci_sock.c:402 mgmt_send_event+0x2b3/0x330 net/bluetooth/mgmt_util.c:86 mgmt_index_event net/bluetooth/mgmt.c:256 [inline] mgmt_index_added+0x1d5/0x210 net/bluetooth/mgmt.c:6565 hci_sock_release+0x3d7/0x4c0 net/bluetooth/hci_sock.c:871 __sock_release+0xcd/0x2b0 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1139 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f08dfaf6c8b RSP: 002b:00007fff3d67d680 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f08dfaf6c8b RDX: 00007f08dfc5b6c8 RSI: ffffffffffffffff RDI: 0000000000000004 RBP: 00007f08dfc58960 R08: 0000000000000000 R09: 00007f08dfc5b6d0 R10: 00007fff3d67d780 R11: 0000000000000293 R12: 000000000014bb19 R13: 00007fff3d67d780 R14: 00007f08dfc56f60 R15: 0000000000000032 Code: c9 5a fa e9 4f ff ff ff 48 89 ef e8 1d c9 5a fa eb 93 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d b4 60 63 00 fb f4 90 e9 07 00 00 00 0f 00 2d a4 60 63 00 f4 c3 90 90 41 55 41 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4120 Comm: syz-executor.5 Not tainted 4.14.272-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88807aeca680 task.stack: ffff88807f460000 RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline] RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline] RIP: 0010:queued_write_lock_slowpath+0xcb/0x1d0 kernel/locking/qrwlock.c:139 RSP: 0018:ffff88807f467d38 EFLAGS: 00000206 RAX: 0000000000000101 RBX: ffffffff89ddaf68 RCX: 00000000000068bf RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89ddaf68 RBP: ffffffff89ddaf6c R08: ffffffff8b9d80b8 R09: 0000000000040594 R10: ffff88807aecaf30 R11: ffff88807aeca680 R12: 0000000000000003 R13: fffffbfff13bb5ed R14: 00000000000000ff R15: ffffffff8863d780 FS: 00007f3c96373700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f523f5718 CR3: 00000000995fe000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:134 [inline] do_raw_write_lock+0xc2/0x1d0 kernel/locking/spinlock_debug.c:203 bt_sock_link+0x1f/0x120 net/bluetooth/af_bluetooth.c:143 hci_sock_create+0x15c/0x1d0 net/bluetooth/hci_sock.c:2034 bt_sock_create+0x13b/0x280 net/bluetooth/af_bluetooth.c:130 __sock_create+0x303/0x620 net/socket.c:1275 sock_create net/socket.c:1315 [inline] SYSC_socket net/socket.c:1345 [inline] SyS_socket+0xd1/0x1b0 net/socket.c:1325 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f3c97a1f049 RSP: 002b:00007f3c96373108 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f3c97b32030 RCX: 00007f3c97a1f049 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001f RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc3483401f R14: 00007f3c96373300 R15: 0000000000022000 Code: 75 dc 49 89 dd 49 89 dc 41 be ff 00 00 00 49 c1 ed 03 41 83 e4 07 48 b8 00 00 00 00 00 fc ff df 49 01 c5 41 83 c4 03 eb 02 f3 90 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 9e 00 00 00 8b 03 83 ---------------- Code disassembly (best guess): 0: c9 leaveq 1: 5a pop %rdx 2: fa cli 3: e9 4f ff ff ff jmpq 0xffffff57 8: 48 89 ef mov %rbp,%rdi b: e8 1d c9 5a fa callq 0xfa5ac92d 10: eb 93 jmp 0xffffffa5 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: e9 07 00 00 00 jmpq 0x29 22: 0f 00 2d b4 60 63 00 verw 0x6360b4(%rip) # 0x6360dd 29: fb sti 2a: f4 hlt * 2b: c3 retq <-- trapping instruction 2c: 90 nop 2d: e9 07 00 00 00 jmpq 0x39 32: 0f 00 2d a4 60 63 00 verw 0x6360a4(%rip) # 0x6360dd 39: f4 hlt 3a: c3 retq 3b: 90 nop 3c: 90 nop 3d: 41 55 push %r13 3f: 41 rex.B