rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (8798 ticks this GP) idle=8b4c/1/0x4000000000000000 softirq=17005/18213 fqs=5248
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1190617       2539            0
rcu: 	cputime:    24168      28294           88   ==> 52490(ms)
rcu: 	(t=10501 jiffies g=9845 q=2564 ncpus=2)
CPU: 0 UID: 0 PID: 6783 Comm: syz.0.263 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:__run_timer_base+0x1b9/0x860
Code: 08 48 89 df e8 e8 67 75 00 48 83 3b 00 74 5b e8 ad 43 12 00 48 8b 7c 24 18 e8 93 41 c3 09 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <48> 8b 44 24 78 42 c7 04 20 00 00 00 00 42 c7 44 20 0c 00 00 00 00
RSP: 0018:ffffc90000007ca0 EFLAGS: 00000202
RAX: 0000000000000101 RBX: 00000000ffffd000 RCX: 0000000000000100
RDX: 0000000000000002 RSI: ffffffff8d99883e RDI: 00000000ffffffff
RBP: ffffc90000007e10 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: dffffc0000000000
R13: ffff88804b0248c8 R14: ffff88804b0248d0 R15: 0000000000000000
FS:  00007f6fa41936c0(0000) GS:ffff8880b861f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f783d5a5fc8 CR3: 000000010d0da000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 run_timer_softirq+0x67/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_irq_work+0xa3/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+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 8b 1d 21 f6 e8 c6 f0 57 f6 fb bf 01 00 00 00 <e8> 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc90007bdece0 EFLAGS: 00000282
RAX: d5dee3b0a6fd4100 RBX: 0000000000000000 RCX: d5dee3b0a6fd4100
RDX: 0000000000000006 RSI: ffffffff8d99883e RDI: 0000000000000001
RBP: ffffc90007bded90 R08: ffffffff8fa1e8f7 R09: 1ffffffff1f43d1e
R10: dffffc0000000000 R11: fffffbfff1f43d1f R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000f7bd9c
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0x19b8/0x2390
Code: 48 c7 c2 80 45 88 8b e8 76 a2 2b 00 48 c7 c7 e0 f0 13 8e 4c 89 fe e8 57 88 2b 00 e8 72 1e 35 00 89 d8 48 81 c4 98 00 00 00 5b <41> 5c 41 5d 41 5e 41 5f 5d e9 9a af fe 09 cc 4c 8b 7c 24 48 eb 89
RSP: 0018:ffffc90007bdee58 EFLAGS: 00000296
RAX: 0000000090317601 RBX: ffffc90007bdeee8 RCX: d5dee3b0a6fd4100
RDX: 0000000000000002 RSI: ffffffff8db8655b RDI: ffff88801f559cc0
RBP: dffffc0000000000 R08: ffffc90007bdeed8 R09: 0000000000000000
R10: ffffc90007bdef38 R11: fffff52000f7bde9 R12: ffffc90007bdeee8
R13: ffffc90007bd8000 R14: ffffc90007bdeee8 R15: ffffffff8172aae5
 __unwind_start+0x5b9/0x760
 arch_stack_walk+0xe4/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 inetdev_init+0x7d/0x500
 inetdev_event+0x301/0x15b0
 notifier_call_chain+0x1b6/0x3e0
 register_netdevice+0x1608/0x1ae0
 __ip_tunnel_create+0x3e7/0x560
 ip_tunnel_init_net+0x2ba/0x800
 ops_init+0x35c/0x5c0
 setup_net+0x219/0x4b0
 copy_net_ns+0x31b/0x4d0
 create_new_namespaces+0x3f3/0x720
 copy_namespaces+0x438/0x4b0
 copy_process+0x1700/0x3b80
 kernel_clone+0x21e/0x870
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6fa338e9a9
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:00007f6fa4192fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f6fa35b5fa0 RCX: 00007f6fa338e9a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000400
RBP: 00007f6fa3410d69 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000006c0 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6fa35b5fa0 R15: 00007ffc41df99f8
 </TASK>
sched: DL replenish lagged too much
