rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=2cfc/1/0x4000000000000000 softirq=14451/14452 fqs=5250
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1043549          0            0
rcu: 	cputime:    23935      28554           76   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=6293 q=2709 ncpus=2)
CPU: 0 UID: 0 PID: 6045 Comm: syz.0.47 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:__alloc_skb+0x86/0x2d0
Code: c0 d0 6d e6 8d 48 c7 c7 d8 6d e6 8d 48 0f 44 f8 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 91 22 d5 f8 4d 8b bf 80 6c e6 8d <e9> 30 02 00 00 e8 50 fe 71 f8 b0 01 45 89 ec 41 81 cc 00 00 02 00
RSP: 0018:ffffc900000079e8 EFLAGS: 00000246
RAX: 1ffffffff1bccdba RBX: 0000000000000000 RCX: 0000000000000100
RDX: ffff888119ca8000 RSI: 0000000000000000 RDI: ffffffff8de66dd0
RBP: 00000000ffffffff R08: ffff888038b9f423 R09: 1ffff11007173e84
R10: dffffc0000000000 R11: ffffed1007173e85 R12: dffffc0000000000
R13: 0000000000000820 R14: 0000000000000000 R15: ffff888100ac4a00
FS:  00007f8b7d5316c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000110d38000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 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:tty_audit_exit+0x4/0x200
Code: db 48 c7 c0 fb ff ff ff 48 0f 45 c3 5b c3 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 <55> 41 57 41 56 41 55 41 54 53 49 bc 00 00 00 00 00 fc ff df e8 83
RSP: 0018:ffffc90004dcfad8 EFLAGS: 00000246
RAX: 1b0507af443d8b00 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8d99883e RDI: 00000000ffffffff
RBP: ffffc90004dcfc30 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: 0000000000000b00 R14: ffff88810923fa30 R15: 0000000000000000
 do_exit+0x5c8/0x22e0
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8b7c78e9a9
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:00007f8b7d531038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: fffffffffffffff2 RBX: 00007f8b7c9b5fa0 RCX: 00007f8b7c78e9a9
RDX: 0000000000000090 RSI: 0000200000000140 RDI: 0000000000000005
RBP: 00007f8b7c810d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8b7c9b5fa0 R15: 00007ffc98841dc8
 </TASK>
sched: DL replenish lagged too much
