rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=ce24/1/0x4000000000000000 softirq=42716/42717 fqs=5244
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1071912          0            0
rcu: 	cputime:    30720      21769           85   ==> 52490(ms)
rcu: 	(t=10502 jiffies g=34569 q=2554 ncpus=2)
CPU: 0 UID: 0 PID: 11680 Comm: syz.5.1419 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:call_rcu+0x73e/0x9c0
Code: 84 24 a1 00 00 00 02 75 62 f7 44 24 50 00 02 00 00 49 bc 00 00 00 00 00 fc ff df 74 01 fb 48 c7 84 24 80 00 00 00 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 66 43 c7 44 25 09 00 00 43 c6 44 25 0b
RSP: 0018:ffffc90000007340 EFLAGS: 00000206
RAX: 6c7e859cbf4b8600 RBX: ffff8880220404d0 RCX: 6c7e859cbf4b8600
RDX: 0000000000000002 RSI: ffffffff8d792409 RDI: ffffffff8bc082e0
RBP: ffffc90000007470 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: dffffc0000000000
R13: 1ffff92000000e78 R14: 1ffff11024207736 R15: 0000000000000011
FS:  00007f523b7b86c0(0000) GS:ffff88818e835000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff630df5fc8 CR3: 000000011222a000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __dev_queue_xmit+0x4ac/0x3140
 ip6_finish_output2+0xfb3/0x1480
 ip6_output+0x340/0x550
 ndisc_send_skb+0xbce/0x1510
 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:lock_acquire+0x16c/0x340
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 d4 38 e0 10 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90003d7fb30 EFLAGS: 00000206
RAX: 6c7e859cbf4b8600 RBX: 0000000000000000 RCX: 6c7e859cbf4b8600
RDX: 00000000b1b47000 RSI: ffffffff8d97916f RDI: ffffffff8bc082e0
RBP: ffffffff81b5a93e R08: ffffffff81b5a93e R09: ffff8881098120e0
R10: dffffc0000000000 R11: ffffed1021302419 R12: 0000000000000000
R13: ffff8881098120e0 R14: 0000000000000001 R15: 0000000000000246
 _raw_spin_lock+0x2e/0x40
 futex_wake+0x1be/0x560
 do_futex+0x395/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f523a98f7c9
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:00007f523b7b80e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f523abe5fa8 RCX: 00007f523a98f7c9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f523abe5fac
RBP: 00007f523abe5fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f523abe6038 R14: 00007ffd16f241e0 R15: 00007ffd16f242c8
 </TASK>
sched: DL replenish lagged too much
