rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10366 ticks this GP) idle=41dc/1/0x4000000000000000 softirq=15802/15803 fqs=4364
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1046850          0            0
rcu: 	cputime:    31321      21168           93   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=7721 q=3617 ncpus=2)
CPU: 1 UID: 0 PID: 6144 Comm: syz.2.73 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+0x374/0x2390
Code: ea 48 01 d2 48 01 f2 48 bd 00 00 00 00 00 fc ff df 0f 84 37 01 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 6d 19 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc900001dfeb8 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffffff8fbab9cc RCX: ffffffff8fbab9d0
RDX: ffffffff903860ec RSI: ffffffff903860ec RDI: ffffffff8be332a0
RBP: dffffc0000000000 R08: 0000000000000008 R09: ffffffff8172c195
R10: ffffc900001dffd8 R11: ffffffff81ac3930 R12: ffffffff903860f0
R13: ffffffff903860f1 R14: ffffc900001dff88 R15: ffffffff8fbab9cc
FS:  00007f59e37ae6c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32212ff8 CR3: 000000010d23c000 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_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0x157/0x9c0
 __dev_queue_xmit+0x85c/0x3b50
 ip6_finish_output2+0x11fe/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:preempt_schedule_irq+0xb0/0x150
Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 fb 88 15 f6 e8 36 e3 4c f6 fb bf 01 00 00 00 <e8> 5b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000483fa40 EFLAGS: 00000286
RAX: 20f892f516ac6b00 RBX: 0000000000000000 RCX: 20f892f516ac6b00
RDX: 0000000000000000 RSI: ffffffff8d9b6a7d RDI: 0000000000000001
RBP: ffffc9000483fae0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006
R10: dffffc0000000000 R11: fffffbfff1f47007 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000907f48
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:futex_private_hash_put+0x167/0x280
Code: 89 ee e8 4c db 0c 00 eb 33 e8 45 d8 0c 00 49 81 c7 10 03 00 00 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 ff e8 5f 4d 70 00 49 8b 07 65 ff 08 31 ed e8 a2 7a c6
RSP: 0018:ffffc9000483fba8 EFLAGS: 00000246
RAX: 1ffff11021e929ca RBX: 1ffff11007b4a003 RCX: dffffc0000000000
RDX: ffffc900096b9000 RSI: 0000000000000316 RDI: 0000000000000317
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81b2d30b
R10: dffffc0000000000 R11: ffffed1004613736 R12: ffff88803da50000
R13: ffff88803da50018 R14: ffffffff81b2d30b R15: ffff88810f494e50
 futex_wake+0x4b2/0x560
 do_futex+0x395/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f59e298ebe9
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:00007f59e37ae0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f59e2bc5fa8 RCX: 00007f59e298ebe9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f59e2bc5fac
RBP: 00007f59e2bc5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f59e2bc6038 R14: 00007ffeac2031e0 R15: 00007ffeac2032c8
 </TASK>
sched: DL replenish lagged too much
