rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=04ac/1/0x4000000000000000 softirq=12934/12934 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1329610          0            0
rcu: 	cputime:     8200      44289           35   ==> 52490(ms)
rcu: 	(t=10501 jiffies g=9393 q=6498 ncpus=2)
CPU: 1 UID: 0 PID: 5824 Comm: syz.1.27 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:__kfence_alloc+0x2ef/0x3e0
Code: 84 b3 00 00 00 48 8d 5c 24 40 ba 00 02 00 00 48 89 df 31 f6 e8 52 d3 ff ff 48 89 df be 40 00 00 00 31 d2 e8 43 9e 7e ff 89 c6 <48> 89 df 48 89 74 24 10 e8 f4 00 00 00 89 c3 48 8b 0d 63 74 fe 0d
RSP: 0018:ffffc90000a085e0 EFLAGS: 00000246
RAX: 0000000000000016 RBX: ffffc90000a08620 RCX: 83e6c11f19532300
RDX: 0000000000000000 RSI: 0000000000000016 RDI: ffff88816981bb00
RBP: ffffc90000a088b8 R08: ffffffff81d60626 R09: ffffffff8e95cd60
R10: ffffc90000a084f8 R11: ffffffff81b0f6a0 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000820 R15: 0000000000000048
FS:  00007fe467bfa6c0(0000) GS:ffff8882a9284000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000009b00 CR3: 000000016a8ca000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __kmalloc_cache_noprof+0x51e/0x660
 dst_cow_metrics_generic+0x56/0x1c0
 icmp6_dst_alloc+0x265/0x440
 ndisc_send_skb+0x44a/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 c6 3e f0 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 c3 cc cc cc cc cc e8 20
RSP: 0018:ffffc9000571f860 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000923a000 RSI: 0000000000000865 RDI: 0000000000000866
RBP: 0000000000000001 R08: ffffffff9030c1f7 R09: 1ffffffff206183e
R10: dffffc0000000000 R11: fffffbfff206183f R12: 1ffff92000ae3f21
R13: 1ffff92000ae3f23 R14: 0000000000000000 R15: ffffc9000571f918
 smp_call_function_single+0x34a/0x5b0
 event_function_call+0x35e/0x9a0
 _perf_event_period+0x1e1/0x230
 perf_ioctl+0xb03/0x20c0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe466d9cdd9
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:00007fe467bfa028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe467015fa0 RCX: 00007fe466d9cdd9
RDX: 0000200000000000 RSI: 0000000040082404 RDI: 0000000000000005
RBP: 00007fe466e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe467016038 R14: 00007fe467015fa0 R15: 00007fff57beca58
 </TASK>
sched: DL replenish lagged too much
