rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10499 ticks this GP) idle=c81/1/0x4000000000000000 softirq=250982/250982 fqs=2843
(t=10502 jiffies g=414177 q=1758)
rcu: rcu_preempt kthread starved for 4589 jiffies! g414177 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:28944 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x186/0x810 kernel/rcu/tree.c:1955
rcu_gp_kthread+0x1de/0x320 kernel/rcu/tree.c:2128
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:553
NMI backtrace for cpu 1
CPU: 1 PID: 30180 Comm: syz-executor.4 Not tainted 5.16.0-rc5-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+0x9d/0x746 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+0x8e/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 5e ad 14 f8 48 89 ef e8 a6 23 15 f8 e8 c1 e3 35 f8 fb bf 01 00 00 00 f6 eb 07 f8 65 8b 05 ef 29 bb 76 85 c0 74 02 5d c3 e8 0b ff b8
RSP: 0018:ffffc900031ef2c0 EFLAGS: 00000206
RAX: 0000000001ce7b09 RBX: dffffc0000000000 RCX: 1ffffffff1fef8e6
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffffffff8bd55138 R08: 0000000000000001 R09: ffffffff8ff77a0f
R10: 0000000000000001 R11: 0000000000000001 R12: 1ffffffff1701e30
R13: ffff88805db58180 R14: ffffffff8bd55138 R15: ffffc90003787b28
rwsem_down_write_slowpath+0x576/0x1110 kernel/locking/rwsem.c:1127
__down_write_common kernel/locking/rwsem.c:1268 [inline]
__down_write_common kernel/locking/rwsem.c:1265 [inline]
__down_write kernel/locking/rwsem.c:1277 [inline]
down_write+0x135/0x150 kernel/locking/rwsem.c:1524
kernfs_activate+0x2a/0x1d0 fs/kernfs/dir.c:1293
kernfs_add_one+0x368/0x4c0 fs/kernfs/dir.c:766
__kernfs_create_file+0x29c/0x350 fs/kernfs/file.c:1014
sysfs_add_file_mode_ns+0x20f/0x3f0 fs/sysfs/file.c:294
create_files fs/sysfs/group.c:64 [inline]
internal_create_group+0x322/0xb10 fs/sysfs/group.c:148
internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:188
internal_create_groups fs/sysfs/group.c:184 [inline]
sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:214
device_add_groups drivers/base/core.c:2473 [inline]
device_add_attrs drivers/base/core.c:2632 [inline]
device_add+0x14ba/0x1ee0 drivers/base/core.c:3345
netdev_register_kobject+0x181/0x430 net/core/net-sysfs.c:2010
register_netdevice+0xd31/0x1500 net/core/dev.c:10336
register_netdev+0x2d/0x50 net/core/dev.c:10460
vti6_init_net+0x449/0x860 net/ipv6/ip6_vti.c:1162
ops_init+0xaf/0x470 net/core/net_namespace.c:140
setup_net+0x40f/0xa30 net/core/net_namespace.c:326
copy_net_ns+0x318/0x760 net/core/net_namespace.c:470
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
copy_namespaces+0x391/0x450 kernel/nsproxy.c:178
copy_process+0x2da7/0x75a0 kernel/fork.c:2194
kernel_clone+0xe7/0xab0 kernel/fork.c:2582
__do_sys_clone+0xc8/0x110 kernel/fork.c:2699
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f047cdfce99
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:00007f047b772168 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f047cf0ff60 RCX: 00007f047cdfce99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: f70a86956630e51d
RBP: 00007f047ce56ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd8e819e4f R14: 00007f047b772300 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 5e ad 14 f8 callq 0xf814ad75
17: 48 89 ef mov %rbp,%rdi
1a: e8 a6 23 15 f8 callq 0xf81523c5
1f: e8 c1 e3 35 f8 callq 0xf835e3e5
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 f6 eb 07 f8 callq 0xf807ec25 <-- trapping instruction
2f: 65 8b 05 ef 29 bb 76 mov %gs:0x76bb29ef(%rip),%eax # 0x76bb2a25
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5d pop %rbp
3b: c3 retq
3c: e8 .byte 0xe8
3d: 0b ff or %edi,%edi
3f: b8 .byte 0xb8