watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.2:20178]
Modules linked in:
irq event stamp: 12106
hardirqs last enabled at (12105): [<ffffffff812307db>] kvm_wait arch/x86/kernel/kvm.c:600 [inline]
hardirqs last enabled at (12105): [<ffffffff812307db>] kvm_wait+0x14b/0x240 arch/x86/kernel/kvm.c:580
hardirqs last disabled at (12106): [<ffffffff874018ae>] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793
softirqs last enabled at (2050): [<ffffffff8760068b>] __do_softirq+0x68b/0x9ff kernel/softirq.c:314
softirqs last disabled at (1951): [<ffffffff81321cf3>] invoke_softirq kernel/softirq.c:368 [inline]
softirqs last disabled at (1951): [<ffffffff81321cf3>] irq_exit+0x193/0x240 kernel/softirq.c:409
CPU: 0 PID: 20178 Comm: syz-executor.2 Not tainted 4.14.277-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888095064680 task.stack: ffff88809b8a8000
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
RSP: 0018:ffff88809b8afb20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff11e1314 RBX: ffffffff89ddb5ac RCX: 1ffff11012a0c9ef
RDX: dffffc0000000000 RSI: ffff888095064f58 RDI: ffff888095064f04
RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286
R13: dffffc0000000000 R14: ffffffff89ddb5ad R15: ffffed10174869e8
FS: 00007fd0c35ce700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000a9773000 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_removed+0x200/0x240 net/bluetooth/mgmt.c:6600
hci_sock_bind+0xe00/0x12b0 net/bluetooth/hci_sock.c:1186
SYSC_bind net/socket.c:1489 [inline]
SyS_bind+0x174/0x1f0 net/socket.c:1475
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fd0c4c590e9
RSP: 002b:00007fd0c35ce168 EFLAGS: 00000246 ORIG_RAX: 0000000000000031
RAX: ffffffffffffffda RBX: 00007fd0c4d6bf60 RCX: 00007fd0c4c590e9
RDX: 0000000000000006 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007fd0c4cb308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe2ba7ca1f R14: 00007fd0c35ce300 R15: 0000000000022000
Code: 8b 5a fa e9 4f ff ff ff 48 89 ef e8 4d 8b 5a fa eb 93 90 90 90 90 90 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d b4 19 63 00 fb f4 <c3> 90 e9 07 00 00 00 0f 00 2d a4 19 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: 20170 Comm: syz-executor.0 Not tainted 4.14.277-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880ac2ca640 task.stack: ffff888093c40000
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:ffff888093c47950 EFLAGS: 00000206
RAX: 0000000000000101 RBX: ffffffff89ddb5a8 RCX: 00000000000005f7
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89ddb5a8
RBP: ffffffff89ddb5ac R08: ffffffff8b9a8a78 R09: 0000000000040590
R10: ffff8880ac2caf18 R11: ffff8880ac2ca640 R12: 0000000000000003
R13: fffffbfff13bb6b5 R14: 00000000000000ff R15: ffff8880a7c4dc90
FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f66aacc3f64 CR3: 0000000008e6a000 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_unlink+0x1d/0x170 net/bluetooth/af_bluetooth.c:151
hci_sock_release+0xc1/0x4c0 net/bluetooth/hci_sock.c:855
__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
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xa44/0x2850 kernel/exit.c:868
do_group_exit+0x100/0x2e0 kernel/exit.c:965
get_signal+0x38d/0x1ca0 kernel/signal.c:2412
do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792
exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160
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: 0033:0x7ff7eed620e9
RSP: 002b:00007ff7ed632218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007ff7eee75378 RCX: 00007ff7eed620e9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff7eee75378
RBP: 00007ff7eee75370 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff7eee7537c
R13: 00007ffcada76a5f R14: 00007ff7ed632300 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: 8b 5a fa mov -0x6(%rdx),%ebx
3: e9 4f ff ff ff jmpq 0xffffff57
8: 48 89 ef mov %rbp,%rdi
b: e8 4d 8b 5a fa callq 0xfa5a8b5d
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 19 63 00 verw 0x6319b4(%rip) # 0x6319dd
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 19 63 00 verw 0x6319a4(%rip) # 0x6319dd
39: f4 hlt
3a: c3 retq
3b: 90 nop
3c: 90 nop
3d: 41 55 push %r13
3f: 41 rex.B