rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10415 ticks this GP) idle=83cc/1/0x4000000000000000 softirq=15190/15190 fqs=5246
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   773339          0            0
rcu: 	cputime:    36606      15882           57   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=7969 q=3354 ncpus=2)
CPU: 1 UID: 0 PID: 6063 Comm: syz.0.46 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:__rcu_read_lock+0x39/0x60
Code: 81 c3 44 04 00 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 18 ff 03 8b 03 3d 00 00 00 40 7d 07 <5b> e9 91 70 d5 09 cc 90 0f 0b 90 eb f3 89 d9 80 e1 07 80 c1 03 38
RSP: 0018:ffffc900001e0508 EFLAGS: 00000283
RAX: 0000000000000001 RBX: ffff888107395a84 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: ffffffff895aa922 RDI: ffffc900001e05e8
RBP: dffffc0000000000 R08: ffffc900001e06b0 R09: 0000000000000003
R10: dffffc0000000000 R11: ffffffff81ac3da0 R12: 1ffff9200003c0bd
R13: ffffc900001e0620 R14: ffffc900001e05e8 R15: ffffc900001e09e8
FS:  00007f4d97dc76c0(0000) GS:ffff8881a3c19000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000012c0 CR3: 00000000293ca000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 unwind_next_frame+0x9e/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 ndisc_alloc_skb+0x9f/0x480
 ndisc_send_rs+0x2b5/0x630
 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:generic_exec_single+0x481/0x500
Code: 75 11 e8 d2 6e 0b 00 48 85 db 75 16 e8 c8 6e 0b 00 eb 15 e8 c1 6e 0b 00 e8 1c 66 c5 09 48 85 db 74 ea e8 b2 6e 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 66 43 c7 44 2c
RSP: 0018:ffffc9000433f9c0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc90003659000 RSI: 000000000000036e RDI: 000000000000036f
RBP: ffffc9000433fa90 R08: ffffffff8fa38537 R09: 1ffffffff1f470a6
R10: dffffc0000000000 R11: fffffbfff1f470a7 R12: 1ffff92000867f3c
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000867f5d
 smp_call_function_single+0x351/0x590
 perf_install_in_context+0x593/0x8f0
 __se_sys_perf_event_open+0x193a/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4d96f8eba9
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:00007f4d97dc7038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f4d971d5fa0 RCX: 00007f4d96f8eba9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000012c0
RBP: 00007f4d97011e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4d971d6038 R14: 00007f4d971d5fa0 R15: 00007fffe6339458
 </TASK>
sched: DL replenish lagged too much
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 104065584304 wd_nsec: 104065586653
