rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=f6b/1/0x4000000000000000 softirq=14973/14974 fqs=5003
(t=10500 jiffies g=20669 q=1387)
NMI backtrace for cpu 0
CPU: 0 PID: 6134 Comm: syz-executor.5 Not tainted 5.18.0-rc7-syzkaller-00181-geaea45fc0e7b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x236/0x3a0 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:639 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:723 [inline]
rcu_pending kernel/rcu/tree.c:3923 [inline]
rcu_sched_clock_irq+0xf1b/0x18d0 kernel/rcu/tree.c:2625
update_process_times+0x197/0x200 kernel/time/timer.c:1788
tick_sched_handle kernel/time/tick-sched.c:243 [inline]
tick_sched_timer+0x377/0x540 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3a6/0xfd0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x280 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x12/0x20
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: 61 19 f7 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 9e 57 41 f7 48 89 df e8 06 c4 42 f7 e8 91 ed 66 f7 fb bf 01 00 00 00 <e8> 66 90 35 f7 65 8b 05 b7 a3 dc 75 85 c0 74 02 5b c3 e8 bc 8c da
RSP: 0018:ffffc90005f66f90 EFLAGS: 00000286
RAX: 6e876bfa0745f500 RBX: ffff8880114674f0 RCX: ffffffff81676828
RDX: dffffc0000000000 RSI: ffffffff8a8d0480 RDI: 0000000000000001
RBP: ffffc90005f671d0 R08: dffffc0000000000 R09: fffffbfff1f643fa
R10: fffffbfff1f643fa R11: 1ffffffff1f643f9 R12: 0000000000000006
R13: dffffc0000000000 R14: ffffc900054fe160 R15: ffff8880114674d8
rwsem_down_write_slowpath+0xc8d/0x1460 kernel/locking/rwsem.c:1118
__down_write_common kernel/locking/rwsem.c:1259 [inline]
__down_write kernel/locking/rwsem.c:1268 [inline]
down_write+0x163/0x170 kernel/locking/rwsem.c:1515
kernfs_drain fs/kernfs/dir.c:486 [inline]
__kernfs_remove+0xc54/0x1150 fs/kernfs/dir.c:1376
kernfs_remove_by_name_ns+0x96/0xe0 fs/kernfs/dir.c:1579
kernfs_remove_by_name include/linux/kernfs.h:558 [inline]
remove_files fs/sysfs/group.c:28 [inline]
sysfs_remove_group+0x102/0x2b0 fs/sysfs/group.c:288
sysfs_remove_groups+0x5b/0xb0 fs/sysfs/group.c:312
device_remove_groups drivers/base/core.c:2478 [inline]
device_remove_attrs+0xc2/0x140 drivers/base/core.c:2678
device_del+0x6e4/0xbe0 drivers/base/core.c:3591
unregister_netdevice_many+0x13bb/0x1950 net/core/dev.c:10774
ip_tunnel_delete_nets+0x325/0x370 net/ipv4/ip_tunnel.c:1124
ops_exit_list net/core/net_namespace.c:167 [inline]
setup_net+0x990/0xc10 net/core/net_namespace.c:348
copy_net_ns+0x359/0x5b0 net/core/net_namespace.c:471
create_new_namespaces+0x4db/0x8e0 kernel/nsproxy.c:110
copy_namespaces+0x333/0x390 kernel/nsproxy.c:178
copy_process+0x18e9/0x3f70 kernel/fork.c:2237
kernel_clone+0x22f/0x7a0 kernel/fork.c:2639
__do_sys_clone3 kernel/fork.c:2914 [inline]
__se_sys_clone3+0x3de/0x430 kernel/fork.c:2898
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f59352890e9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f593639f038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f593539c1d0 RCX: 00007f59352890e9
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00007f593639f050
RBP: 00007f59352e308d R08: 0000000000000000 R09: 0000000000000058
R10: 00007f593639f050 R11: 0000000000000246 R12: 0000000000000058
R13: 00007fff856a699f R14: 00007f593639f300 R15: 0000000000022000
</TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 19 f7 sbb %esi,%edi
2: ff 90 53 48 89 fb callq *-0x476b7ad(%rax)
8: 48 83 c7 18 add $0x18,%rdi
c: 48 8b 74 24 08 mov 0x8(%rsp),%rsi
11: e8 9e 57 41 f7 callq 0xf74157b4
16: 48 89 df mov %rbx,%rdi
19: e8 06 c4 42 f7 callq 0xf742c424
1e: e8 91 ed 66 f7 callq 0xf766edb4
23: fb sti
24: bf 01 00 00 00 mov $0x1,%edi
* 29: e8 66 90 35 f7 callq 0xf7359094 <-- trapping instruction
2e: 65 8b 05 b7 a3 dc 75 mov %gs:0x75dca3b7(%rip),%eax # 0x75dca3ec
35: 85 c0 test %eax,%eax
37: 74 02 je 0x3b
39: 5b pop %rbx
3a: c3 retq
3b: e8 .byte 0xe8
3c: bc .byte 0xbc
3d: 8c da mov %ds,%edx