rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=ac6c/1/0x4000000000000000 softirq=34165/34170 fqs=5114
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1194684          0            0
rcu: 	cputime:    32161      20328           80   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=28477 q=1635 ncpus=2)
CPU: 0 UID: 0 PID: 9988 Comm: syz.1.1172 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:unwind_next_frame+0x12d3/0x2390
Code: 74 0a 48 8b 7c 24 18 e8 9b 84 b0 00 48 8b 44 24 18 48 8b 10 48 c7 c7 00 3f 88 8b 89 de e8 15 bd b4 ff e9 43 06 00 00 49 89 d5 <48> 89 d5 48 89 d8 48 29 e8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01
RSP: 0018:ffffc90000007078 EFLAGS: 00000287
RAX: ffffffff903441f8 RBX: ffffffff8fb7fee0 RCX: af277cbe27db1000
RDX: ffffffff8fb7fed0 RSI: ffffffff903441da RDI: ffffffff8be33e20
RBP: dffffc0000000000 R08: 0000000000000005 R09: ffffffff8172d195
R10: ffffc90000007198 R11: ffffffff81ac4d00 R12: ffffffff81850608
R13: ffffffff8fb7fed0 R14: ffffc90000007148 R15: 0000000000008506
FS:  00007faa6df306c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001240ce000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 ref_tracker_alloc+0x133/0x460
 ___neigh_create+0xc9e/0x2260
 ip6_finish_output2+0xb4d/0x16a0
 ndisc_send_skb+0xb54/0x1440
 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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 df e4 eb 09 e8 8a 41 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90006f177f8 EFLAGS: 00000282
RAX: af277cbe27db1000 RBX: 0000000000000000 RCX: af277cbe27db1000
RDX: 0000000000000006 RSI: ffffffff8d9ba4b2 RDI: ffffffff8be33e80
RBP: ffffc90006f17850 R08: ffffffff8fa3ab37 R09: 1ffffffff1f47566
R10: dffffc0000000000 R11: fffffbfff1f47567 R12: ffff888107b83980
R13: dffffc0000000000 R14: ffff888020478000 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:up_write+0x0/0x420
Code: c7 64 dc a3 8f e8 00 64 86 00 e9 79 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 18 48 89 fb 48
RSP: 0018:ffffc90006f17be0 EFLAGS: 00000293
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff888107b83980
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88801dc47328
RBP: 0000000000000025 R08: ffff88812cd8c203 R09: 1ffff110259b1840
R10: dffffc0000000000 R11: ffffed10259b1841 R12: ffff88801dc47328
R13: dffffc0000000000 R14: ffff88812cd8c200 R15: ffff88811ddfb638
 perf_fasync+0xcd/0x110
 do_vfs_ioctl+0x1064/0x1430
 __se_sys_ioctl+0x82/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faa6d18eba9
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:00007faa6df30038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007faa6d3d6180 RCX: 00007faa6d18eba9
RDX: 00002000000004c0 RSI: 0000000000005452 RDI: 0000000000000025
RBP: 00007faa6d211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faa6d3d6218 R14: 00007faa6d3d6180 R15: 00007ffcd2667558
 </TASK>
sched: DL replenish lagged too much
