rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=a0bc/1/0x4000000000000000 softirq=28576/28580 fqs=4751
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   993118          0            0
rcu: 	cputime:    24328      28151           93   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=19865 q=2891 ncpus=2)
CPU: 0 UID: 0 PID: 9335 Comm: syz.3.1515 Not tainted 6.16.0-rc6-syzkaller-00434-gcd7c97f4584a #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:rcu_read_unlock_special+0x87/0x4c0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 92 37 f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900000078c0 EFLAGS: 00000206
RAX: 2f5b0708eaa1f200 RBX: 1ffff92000000f20 RCX: 2f5b0708eaa1f200
RDX: 0000000000000002 RSI: ffffffff8d9986f9 RDI: ffffffff8be29f80
RBP: ffffc900000079b8 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f401dcaf6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d218e56c0 CR3: 000000012b950000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000082 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 get_mem_cgroup_from_objcg+0x1b0/0x1d0
 __memcg_kmem_uncharge_page+0x85/0x170
 __free_frozen_pages+0x174/0xe70
 __tlb_remove_table+0x2d2/0x3b0
 tlb_remove_table_rcu+0x85/0x100
 rcu_core+0xca8/0x1710
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__kernfs_create_file+0x22b/0x2e0
Code: c6 64 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 a4 00 00 00 41 80 4e 01 20 eb 05 e8 5d 64 62 ff 48 89 df e8 05 58 ff ff <89> c5 31 ff 89 c6 e8 8a 68 62 ff 85 ed 74 12 e8 41 64 62 ff 48 89
RSP: 0018:ffffc90002b3f398 EFLAGS: 00000296
RAX: 0000000000000000 RBX: ffff88812aedaa50 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: ffffffff8eb0e2c0 R08: ffff88801b2f791f R09: 1ffff1100365ef23
R10: dffffc0000000000 R11: ffffed100365ef24 R12: ffff88812aedaae0
R13: dffffc0000000000 R14: ffffffff8b9c5c28 R15: ffffffff8b9c5c78
 sysfs_add_file_mode_ns+0x238/0x300
 sysfs_merge_group+0x177/0x310
 dpm_sysfs_add+0xd2/0x270
 device_add+0x4d8/0xb50
 netdev_register_kobject+0x156/0x2f0
 register_netdevice+0x126c/0x1ae0
 register_netdev+0x40/0x60
 ip6gre_init_net+0x27d/0x3b0
 ops_init+0x35c/0x5c0
 setup_net+0x219/0x4b0
 copy_net_ns+0x31b/0x4d0
 create_new_namespaces+0x3f3/0x720
 copy_namespaces+0x438/0x4b0
 copy_process+0x1700/0x3b80
 kernel_clone+0x21e/0x870
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f401cd8eb69
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f401dcaefe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f401cfb6080 RCX: 00007f401cd8eb69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000400
RBP: 00007f401ce11df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f401cfb6080 R15: 00007ffcfd6cc0a8
 </TASK>
sched: DL replenish lagged too much
