rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (6358 ticks this GP) idle=28bc/1/0x4000000000000000 softirq=84379/84384 fqs=5196
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1158884         28            0
rcu: 	cputime:    32244      20235           42   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=82789 q=1409 ncpus=2)
CPU: 1 UID: 0 PID: 19157 Comm: syz.8.3671 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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 2b 7c 4a f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 20 13 f6 65 8b 05 6c e1 23 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900001e04e0 EFLAGS: 00000206
RAX: 87431806676bd000 RBX: 0000000000000a06 RCX: 87431806676bd000
RDX: 0000000000000002 RSI: ffffffff8d9ba17b RDI: 0000000000000001
RBP: ffffc900001e0578 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: dffffc0000000000
R13: ffff8881209483f0 R14: ffffffff99d4b4f0 R15: 1ffff9200003c09c
FS:  00007fc00a5486c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8b116bfc8 CR3: 000000003ad34000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 debug_check_no_obj_freed+0x451/0x470
 kmem_cache_free+0x113/0x400
 icmp_rcv+0x90b/0x1270
 ip_protocol_deliver_rcu+0x2e0/0x440
 ip_local_deliver_finish+0x3bb/0x6f0
 NF_HOOK+0x30c/0x3a0
 NF_HOOK+0x30c/0x3a0
 __netif_receive_skb+0x143/0x380
 process_backlog+0x60e/0x14f0
 __napi_poll+0xc7/0x360
 net_rx_action+0x707/0xe30
 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:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 2b 7c 4a f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 20 13 f6 65 8b 05 6c e1 23 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900036bef20 EFLAGS: 00000206
RAX: 87431806676bd000 RBX: 0000000000000246 RCX: 87431806676bd000
RDX: 0000000000000006 RSI: ffffffff8d9ba17b RDI: 0000000000000001
RBP: ffffc900036befb0 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: dffffc0000000000
R13: ffffffff8e13f440 R14: ffffffff8e13f440 R15: 1ffff920006d7de4
 rcu_preempt_deferred_qs_irqrestore+0x89c/0xce0
 rcu_read_unlock_special+0x3a2/0x4b0
 __rcu_read_unlock+0x84/0xe0
 unwind_next_frame+0x19ae/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 kvfree_call_rcu+0xbb/0x410
 fib_rules_unregister+0x2f4/0x390
 fib6_rules_net_exit_batch+0x64/0xc0
 ops_undo_list+0x525/0x990
 setup_net+0x2d3/0x320
 copy_net_ns+0x31b/0x4d0
 create_new_namespaces+0x3f3/0x720
 copy_namespaces+0x438/0x4b0
 copy_process+0x1733/0x3c00
 kernel_clone+0x21e/0x840
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc00978eba9
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:00007fc00a547fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fc0099d5fa0 RCX: 00007fc00978eba9
RDX: 0000200000000140 RSI: 0000000000000000 RDI: 0000000041001000
RBP: 00007fc009811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fc0099d6038 R14: 00007fc0099d5fa0 R15: 00007ffd2c8d2148
 </TASK>
sched: DL replenish lagged too much
