rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10458 ticks this GP) idle=c01c/1/0x4000000000000000 softirq=27520/27869 fqs=5248
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1332706       1073            0
rcu: 	cputime:    28499      23986           40   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=21033 q=6746 ncpus=2)
CPU: 1 UID: 0 PID: 8546 Comm: syz.4.689 Not tainted syzkaller #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:lock_release+0x4/0x3e0
Code: 61 03 48 8b 3c 24 e9 08 fa ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 41 57 41 56 41 55 41 54 53 48 83 ec 30 49 89 f5 49 89 fe 65 48
RSP: 0000:ffffc900001e0350 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff90babf01 RCX: 09c7d2d864c96100
RDX: ffffc900001e0401 RSI: ffffffff8172c195 RDI: ffffffff8e139ea0
RBP: dffffc0000000000 R08: ffffc900001e0860 R09: 0000000000000000
R10: ffffc900001e0478 R11: fffff5200003c091 R12: ffffc900001e0870
R13: ffffc900001d9000 R14: ffffc900001e0428 R15: ffffffff8172c195
FS:  00007efcaaa366c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5d0de3580 CR3: 0000000028e50000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 dst_alloc+0x105/0x170
 icmp6_dst_alloc+0x75/0x420
 ndisc_send_skb+0x41f/0x1440
 addrconf_rs_timer+0x369/0x670
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 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:__memcg_kmem_uncharge_page+0x100/0x170
Code: 67 41 f6 04 24 01 75 0c 49 83 c7 10 4c 89 ff e8 e6 ae 00 00 80 3c 2b 00 74 08 4c 89 ef e8 58 fb f7 ff 49 c7 45 00 00 00 00 00 <4c> 89 f7 5b 41 5c 41 5d 41 5e 41 5f 5d e9 be ae 00 00 89 ea be 01
RSP: 0000:ffffc900034376f0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffffd4000115627 RCX: 09c7d2d864c96100
RDX: 0000000000000000 RSI: ffffffff8d9b6a28 RDI: ffffffff8be33300
RBP: dffffc0000000000 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffff88811a09804c
R13: ffffea00008ab138 R14: ffff8881072dec80 R15: ffff88811a098010
 __free_frozen_pages+0x17b/0xd30
 pagetable_dtor_free+0x2d2/0x3b0
 __mmdrop+0xb5/0x580
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock_irq+0x45/0x50
 task_work_run+0x191/0x260
 get_signal+0x11ed/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 irqentry_exit_to_user_mode+0x81/0x120
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7efca9a5eb5d
Code: d3 6e 1d 00 31 c0 e8 a2 f6 fe ff 48 83 c4 68 5b 5d 41 5c 41 5e c3 0f 1f 80 00 00 00 00 48 8b 44 24 18 48 8b 1c 24 48 8b 70 68 <8b> 78 08 48 8d 53 30 e8 c7 57 ff ff 48 89 83 88 00 00 00 e9 38 fe
RSP: 002b:00007efcaaa36060 EFLAGS: 00000246
RAX: 00007efca9d51730 RBX: 00007efca9db5fa0 RCX: 00007efca9c282d5
RDX: ecfe27e22720a256 RSI: 0000000000000000 RDI: 00007efcaaa36588
RBP: 00007efca9c11e19 R08: 0000000002f4231d R09: 7fffffffffffffff
R10: 3fffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007efca9db6038 R14: 00007efca9db5fa0 R15: 00007fffbb5af7f8
 </TASK>
