rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=563c/1/0x4000000000000000 softirq=17898/17899 fqs=4627
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1040938          0            0
rcu: 	cputime:    24014      28464           83   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=9341 q=2313 ncpus=2)
CPU: 0 UID: 0 PID: 6495 Comm: syz.0.162 Not tainted 6.16.0-syzkaller-06600-g1dbf1d590d10-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:fib_nh_common_release+0x257/0x420
Code: c2 f7 eb 05 e8 0a dc c2 f7 4c 89 f7 e8 c2 cd 06 f8 4c 8b 3c 24 4d 8d 77 40 e8 25 fb 72 01 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 f7 e8 cf fe 25 f8 4d 8b 36 4d 85 f6 74 17 e8 d2 db c2
RSP: 0018:ffffc90000007b40 EFLAGS: 00000246
RAX: 1ffff1100421bc98 RBX: 00000000fffffff8 RCX: ffff888023775640
RDX: 0000000000000002 RSI: ffffffff8d9792dd RDI: 00000000ffffffff
RBP: 1ffffffff1b73e6c R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880210de4c0 R15: ffff8880210de480
FS:  00007fa243bd96c0(0000) GS:ffff8880b8680000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3a8477 CR3: 0000000048364000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 free_fib_info_rcu+0xdf/0x310
 rcu_core+0xca8/0x1710
 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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 df 31 e1 09 e8 2a 10 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc9000260f898 EFLAGS: 00000282
RAX: 8f69ed08cd4f3a00 RBX: 0000000000000000 RCX: 8f69ed08cd4f3a00
RDX: 0000000000000006 RSI: ffffffff8d9792dd RDI: ffffffff8be30a00
RBP: ffffc9000260f8f0 R08: ffffffff8fa07bf7 R09: 1ffffffff1f40f7e
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: ffff888023775640
R13: dffffc0000000000 R14: ffff888021071cc0 R15: ffff88804b03ab18
 __schedule+0x173f/0x4d30
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e3/0x1340
 tun_chr_close+0x3e/0x1c0
 __fput+0x44c/0xa70
 fput_close_sync+0x119/0x200
 __x64_sys_close+0x7f/0x110
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa242d8ebe9
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:00007fa243bd9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00007fa242fb6090 RCX: 00007fa242d8ebe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fa242e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa242fb6128 R14: 00007fa242fb6090 R15: 00007ffc8b71add8
 </TASK>
sched: DL replenish lagged too much
