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ODEBUG: free active (active state 0) object type: timer_list hint: xprt_init_autodisconnect+0x0/0x110 net/sunrpc/xprt.c:1311
WARNING: CPU: 0 PID: 7 at lib/debugobjects.c:484 debug_print_object+0x160/0x210 lib/debugobjects.c:481
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x128/0x182 lib/dump_stack.c:118
 panic+0x22a/0x4e3 kernel/panic.c:221
 __warn.cold.10+0x25/0x26 kernel/panic.c:582
 report_bug+0x1ad/0x270 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x123/0x210 arch/x86/kernel/traps.c:267
 do_invalid_op+0x31/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:debug_print_object+0x160/0x210 lib/debugobjects.c:481
Code: 8d 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 96 00 00 00 48 8b 14 dd c0 60 8d 87 4c 89 f6 48 c7 c7 20 56 8d 87 e8 ec 7d fb fd <0f> 0b 83 05 5b 9d 2e 06 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e c3
RSP: 0018:ffffc90000007d48 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000101 RSI: 0000000000000007 RDI: ffffffff8b3ef460
RBP: 0000000000000001 R08: ffffed1015d045d1 R09: ffffed1015d045d1
R10: ffffed1015d045d0 R11: ffff8880ae822e83 R12: ffffffff889a4100
R13: ffffffff8157f5a0 R14: ffffffff878d5d20 R15: ffff88808f32e640
 __debug_check_no_obj_freed lib/debugobjects.c:963 [inline]
 debug_check_no_obj_freed+0x2de/0x454 lib/debugobjects.c:994
 kfree+0xf4/0x2b0 mm/slab.c:3756
 __rcu_reclaim kernel/rcu/rcu.h:215 [inline]
 rcu_do_batch kernel/rcu/tree.c:2183 [inline]
 rcu_core+0x5e6/0x1400 kernel/rcu/tree.c:2408
 __do_softirq+0x26e/0x9b2 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x191/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1a1/0x5f0 arch/x86/kernel/apic/apic.c:1137
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline]
RIP: 0010:kmem_cache_free+0xac/0x320 mm/slab.c:3695
Code: 84 10 01 00 00 41 f7 c4 00 02 00 00 0f 84 e1 00 00 00 e8 77 cf d1 ff 48 83 3d 67 b8 f9 06 00 0f 84 66 02 00 00 4c 89 e7 57 9d <0f> 1f 44 00 00 4c 8b 64 24 20 0f 1f 44 00 00 65 8b 05 86 96 68 7e
RSP: 0018:ffffc90000cdf880 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: ffff88821b040700 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000286
RBP: ffff88809b7973c0 R08: fffffbfff1610390 R09: fffffbfff1610390
R10: fffffbfff161038f R11: ffffffff8b081c7f R12: 0000000000000286
R13: ffffffff85af2cf1 R14: ffff88809e6c4000 R15: 0000000000000cc0
 netlink_broadcast_filtered+0x2c1/0xab0 net/netlink/af_netlink.c:1512
 netlink_broadcast net/netlink/af_netlink.c:1534 [inline]
 nlmsg_multicast include/net/netlink.h:968 [inline]
 nlmsg_notify+0x68/0x150 net/netlink/af_netlink.c:2520
 mpls_dev_notify+0x411/0x5f0 net/mpls/af_mpls.c:1631
 notifier_call_chain+0x86/0x150 kernel/notifier.c:83
 call_netdevice_notifiers_extack net/core/dev.c:1905 [inline]
 call_netdevice_notifiers net/core/dev.c:1919 [inline]
 rollback_registered_many+0x624/0xd10 net/core/dev.c:8755
 unregister_netdevice_many+0x39/0x1f0 net/core/dev.c:9908
 ip_tunnel_delete_nets+0x307/0x490 net/ipv4/ip_tunnel.c:1113
 cleanup_net+0x46b/0x920 net/core/net_namespace.c:597
 process_one_work+0x8d1/0x15b0 kernel/workqueue.c:2264
 worker_thread+0x82/0xb50 kernel/workqueue.c:2410
 kthread+0x31d/0x3e0 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..