rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=4aac/1/0x4000000000000000 softirq=13600/13601 fqs=4860
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1279415          0            0
rcu: 	cputime:     7877      44622           35   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=9649 q=4526 ncpus=2)
CPU: 1 UID: 0 PID: 5796 Comm: syz.0.24 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+0x1a5e/0x2550
Code: 3c 28 00 74 05 e8 d2 f6 b9 00 4d 8b 6e 08 4d 8d 7e 10 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 b5 f6 b9 00 49 8b 07 <4d> 39 e5 0f 96 c1 4c 39 e0 0f 97 c2 20 ca 80 fa 01 0f 85 63 01 00
RSP: 0018:ffffc90000a082d8 EFLAGS: 00000246
RAX: ffffc90000a09000 RBX: ffffffff914c2301 RCX: 0000000000000001
RDX: ffffc90000a083e8 RSI: dffffc0000000000 RDI: ffffc90000a083b0
RBP: dffffc0000000000 R08: ffffc90000a088c0 R09: 0000000000000000
R10: ffffc90000a083f8 R11: fffff52000141081 R12: ffffc90000a088d0
R13: ffffc90000a01000 R14: ffffc90000a083a8 R15: ffffc90000a083b8
FS:  00007f20881f66c0(0000) GS:ffff8882a9289000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000016a790000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x35c/0x760
 ___neigh_create+0x6d5/0x2250
 ip6_finish_output2+0x729/0x13e0
 ip6_output+0x340/0x550
 ndisc_send_skb+0xd0b/0x1670
 addrconf_rs_timer+0x395/0x6d0
 call_timer_fn+0x192/0x5e0
 __run_timer_base+0x652/0x8b0
 run_timer_softirq+0xb7/0x170
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:generic_exec_single+0x3e7/0x430
Code: 75 11 e8 5c 16 0c 00 48 85 db 75 16 e8 52 16 0c 00 eb 15 e8 4b 16 0c 00 e8 f6 19 ef 09 48 85 db 74 ea e8 3c 16 0c 00 fb 31 c0 <48> 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 56 0d f2 09 cc e8 20
RSP: 0018:ffffc90005d97a60 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc90021ba9000 RSI: 00000000000002e4 RDI: 00000000000002e5
RBP: 0000000000000001 R08: ffffffff9030b8f7 R09: 1ffffffff206171e
R10: dffffc0000000000 R11: fffffbfff206171f R12: 1ffff92000bb2f61
R13: 1ffff92000bb2f63 R14: 0000000000000000 R15: ffffc90005d97b18
 smp_call_function_single+0x34a/0x5b0
 perf_install_in_context+0x5c0/0x930
 __se_sys_perf_event_open+0x1902/0x1d40
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2089f9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f20881f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f208a216090 RCX: 00007f2089f9cdd9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007f208a032d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f208a216128 R14: 00007f208a216090 R15: 00007ffe2cbf5398
 </TASK>
sched: DL replenish lagged too much
