rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10197 ticks this GP) idle=c9c4/1/0x4000000000000000 softirq=58238/58267 fqs=5214
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1008429        109            0
rcu: 	cputime:    35934      16564           53   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=39585 q=2288 ncpus=2)
CPU: 1 UID: 0 PID: 12035 Comm: syz.8.1255 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:arch_stack_walk+0x11c/0x150
Code: ff ff 4c 89 ff e8 f4 74 09 00 48 85 c0 74 24 48 89 df 48 89 c6 4d 89 f3 2e e8 30 d8 f3 09 84 c0 74 11 4c 89 ff e8 24 76 09 00 <83> bd 78 ff ff ff 00 75 cf 65 48 8b 05 53 e7 13 11 48 3b 45 d8 75
RSP: 0018:ffffc90000a08548 EFLAGS: 00000292
RAX: 000000009022c601 RBX: ffffc90000a08600 RCX: af67f0da0d469100
RDX: 0000000000000002 RSI: ffffffff8d792409 RDI: ffffffff8bc082e0
RBP: ffffc90000a085d0 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: ffff888114d39d40
R13: 00000000000000f0 R14: ffffffff81ada120 R15: ffffc90000a08548
FS:  00007eff205a76c0(0000) GS:ffff8882a9e35000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555853b25c8 CR3: 0000000174420000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x43c/0x720
 __alloc_skb+0x255/0x430
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 addrconf_rs_timer+0x369/0x6a0
 call_timer_fn+0x16e/0x590
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x27d/0x850
 __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:rcu_read_unlock_special+0x87/0x520
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 e2 59 d6 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900084de940 EFLAGS: 00000206
RAX: af67f0da0d469100 RBX: 1ffff9200109bd2c RCX: af67f0da0d469100
RDX: 0000000000000007 RSI: ffffffff8d792409 RDI: ffffffff8bc082e0
RBP: ffffc900084dea18 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: 0000000000000246
R13: dffffc0000000000 R14: 0000000000000002 R15: ffff88823c63b800
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x1ab6/0x23d0
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x197/0x620
 finish_task_switch+0x44b/0x940
 __schedule+0x14c4/0x5000
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x5d8/0x660
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_common+0x11/0xd0
Code: 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 41 57 41 56 53 49 bf 00 00 00 00 00 fc ff df eb 0d <48> f7 03 10 00 00 00 0f 84 9b 00 00 00 65 ff 05 6b bd 21 07 65 8b
RSP: 0018:ffffc900084df380 EFLAGS: 00000246
RAX: 1ffff110229a73a8 RBX: ffff888114d39d40 RCX: af67f0da0d469100
RDX: 0000000000000000 RSI: ffffffff8bc082c0 RDI: ffffffff8bc08280
RBP: ffffc900084df418 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: dffffc0000000000
R13: ffffffff8df46e00 R14: ffff888114d3b260 R15: dffffc0000000000
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 _raw_spin_unlock_irqrestore+0xfd/0x110
 rcu_preempt_deferred_qs_irqrestore+0x89c/0xce0
 rcu_read_unlock_special+0x3d8/0x520
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x1ab6/0x23d0
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 save_stack+0xf5/0x1f0
 __reset_page_owner+0x71/0x1f0
 __free_frozen_pages+0xbc8/0xd30
 __put_partials+0x146/0x170
 put_cpu_partial+0x1f2/0x2d0
 __slab_free+0x288/0x2a0
 qlist_free_all+0x97/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_lru_noprof+0x36c/0x6e0
 sock_alloc_inode+0x28/0xc0
 alloc_inode+0x6a/0x1b0
 __sock_create+0x12d/0x9d0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7eff1f78f7c9
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:00007eff205a7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007eff1f9e5fa0 RCX: 00007eff1f78f7c9
RDX: 0000000000000300 RSI: 0200000000000002 RDI: 0000000000000011
RBP: 00007eff1f7f297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007eff1f9e6038 R14: 00007eff1f9e5fa0 R15: 00007ffd1ca8c9f8
 </TASK>
sched: DL replenish lagged too much
