rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10497 ticks this GP) idle=9d54/1/0x4000000000000000 softirq=18510/18517 fqs=5246
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   961333          0            0
rcu: 	cputime:    24360      28129           97   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=11265 q=3382 ncpus=2)
CPU: 0 UID: 0 PID: 6846 Comm: syz.0.310 Not tainted 6.16.0-rc6-syzkaller-00411-g95993dc3039e-dirty #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_unlock_special+0x87/0x4c0
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 62 2c f8 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc90000007840 EFLAGS: 00000206
RAX: aa4e10c5a899ba00 RBX: 1ffff92000000f10 RCX: aa4e10c5a899ba00
RDX: 0000000000000002 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: ffffc90000007940 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: ffffffff8e144400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
FS:  00007f87e079b6c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e4921 CR3: 0000000112722000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x84/0xe0
 ipv6_get_ifaddr+0x69c/0x790
 ndisc_send_rs+0x98/0x630
 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:do_syscall_64+0xc3/0x3b0
Code: 00 48 8b 7d 08 48 89 7b 18 e8 49 5a 00 00 0f 1f 44 00 00 0f 1f 44 00 00 90 e8 c9 74 59 f6 90 90 e8 72 74 59 f6 fb 49 8b 57 08 <f6> c2 3f 74 0e 4c 89 f7 4c 89 ee e8 cd cc 3c f6 49 89 c4 90 90 41
RSP: 0018:ffffc9000ac4fef0 EFLAGS: 00000286
RAX: aa4e10c5a899ba00 RBX: ffffc9000ac4fef0 RCX: aa4e10c5a899ba00
RDX: 0000000000000000 RSI: ffffffff8d998940 RDI: ffffffff8be29f40
RBP: ffffc9000ac4ff48 R08: ffffffff8fa1e9f7 R09: 1ffffffff1f43d3e
R10: dffffc0000000000 R11: fffffbfff1f43d3f R12: 00000000000000ca
R13: 00000000000000ca R14: ffffc9000ac4ff58 R15: ffff8880214b9cc0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f87df98e9a9
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:00007f87e079b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f87dfbb5fa8 RCX: 00007f87df98e9a9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f87dfbb5fac
RBP: 00007f87dfbb5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 000000000000000c R11: 0000000000000246 R12: 00007f87dfbb5fac
R13: 0000000000000000 R14: 00007ffe3b4aa8d0 R15: 00007ffe3b4aa9b8
 </TASK>
sched: DL replenish lagged too much
