rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=a71/1/0x4000000000000000 softirq=219530/219531 fqs=5243
(t=10502 jiffies g=423945 q=75)
NMI backtrace for cpu 0
CPU: 0 PID: 4815 Comm: syz-executor.3 Not tainted 5.16.0-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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x5c/0x759 kernel/rcu/tree.c:2597
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 1e f6 14 f8 48 89 ef e8 d6 6b 15 f8 e8 01 23 36 f8 fb bf 01 00 00 00 76 36 08 f8 65 8b 05 6f 8a bb 76 85 c0 74 02 5d c3 e8 8b 5f b9
RSP: 0018:ffffc90000007e08 EFLAGS: 00000206
RAX: 0000000001ada882 RBX: ffffffff8747f020 RCX: 1ffffffff1ff9d6e
RDX: 0000000000000000 RSI: 0000000000000101 RDI: 0000000000000001
RBP: ffff8880b9c28280 R08: 0000000000000001 R09: ffffffff8ff7aadf
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000007e98
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880b9c28280
expire_timers kernel/time/timer.c:1465 [inline]
__run_timers.part.0+0x66c/0xa30 kernel/time/timer.c:1734
__run_timers kernel/time/timer.c:1715 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
__do_softirq+0x29b/0x9c2 kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__might_resched+0x4/0x2c0 kernel/sched/core.c:9493
Code: 00 00 00 48 8b 44 24 78 65 48 2b 04 25 28 00 00 00 75 07 48 83 ec 80 5b 5d c3 e8 a7 cd f4 07 0f 1f 80 00 00 00 00 41 56 41 55 <41> 54 41 89 f4 be ff ff ff ff 55 48 89 fd 48 c7 c7 40 12 b8 8b 53
RSP: 0018:ffffc9001061f738 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff920020c3eea RCX: 0000000000000000
RDX: 0000000000000000 RSI: 00000000000005f2 RDI: ffffffff89abee40
RBP: ffffffff8bd56ce0 R08: 0000000000000001 R09: ffffffff8bd56ce7
R10: fffffbfff17aad9c R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88802f674000 R15: 0000000000000000
down_write+0x6c/0x150 kernel/locking/rwsem.c:1522
kernfs_remove_by_name_ns+0x29/0xa0 fs/kernfs/dir.c:1540
kernfs_remove_by_name include/linux/kernfs.h:570 [inline]
sysfs_unmerge_group+0xe3/0x160 fs/sysfs/group.c:368
rpm_sysfs_remove drivers/base/power/sysfs.c:826 [inline]
dpm_sysfs_remove+0x79/0xb0 drivers/base/power/sysfs.c:835
device_del+0x20c/0xd60 drivers/base/core.c:3558
hci_conn_del_sysfs+0xdc/0x180 net/bluetooth/hci_sysfs.c:78
hci_conn_cleanup+0x2e7/0x6c0 net/bluetooth/hci_conn.c:138
hci_conn_del+0x2a0/0x790 net/bluetooth/hci_conn.c:806
hci_conn_hash_flush+0x19c/0x260 net/bluetooth/hci_conn.c:1743
hci_dev_do_close+0x57d/0x1150 net/bluetooth/hci_core.c:1672
hci_unregister_dev+0x1c8/0x5b0 net/bluetooth/hci_core.c:3915
vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:462
__fput+0x286/0x9f0 fs/file_table.c:280
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
exit_task_work include/linux/task_work.h:32 [inline]
do_exit+0xc14/0x2b40 kernel/exit.c:832
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2852
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f1fe0b30e99
Code: Unable to access opcode bytes at RIP 0x7f1fe0b30e6f.
RSP: 002b:00007f1fdf4a6168 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000003 RBX: 00007f1fe0c43f60 RCX: 00007f1fe0b30e99
RDX: ff7fffffffffffff RSI: 0000000000000000 RDI: 0000000020000700
RBP: 00007f1fe0b8aff1 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffb83e097f R14: 00007f1fdf4a6300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
5: 55 push %rbp
6: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
b: 48 89 fd mov %rdi,%rbp
e: 48 83 c7 18 add $0x18,%rdi
12: e8 1e f6 14 f8 callq 0xf814f635
17: 48 89 ef mov %rbp,%rdi
1a: e8 d6 6b 15 f8 callq 0xf8156bf5
1f: e8 01 23 36 f8 callq 0xf8362325
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 76 36 08 f8 callq 0xf80836a5 <-- trapping instruction
2f: 65 8b 05 6f 8a bb 76 mov %gs:0x76bb8a6f(%rip),%eax # 0x76bb8aa5
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5d pop %rbp
3b: c3 retq
3c: e8 .byte 0xe8
3d: 8b 5f b9 mov -0x47(%rdi),%ebx