======================================
| [ 1164.077102][    C0]  #5: ffffffffa03a5bf8 (remove_cache_srcu){.+.+}-{0:0}, at: kasan_quarantine_reduce (./include/linux/srcu.h:187 (discriminator 2) ./include/linux/srcu.h:294 (discriminator 2) mm/kasan/quarantine.c:259 (discriminator 2))
| [ 1164.077313][    C0]  #6: ffffffffa018bc80 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [ 1164.077489][    C0]
| [ 1164.077489][    C0] stack backtrace:
[ 1164.077616][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1164.077619][    C0] Workqueue: netns cleanup_net
[ 1164.077622][    C0] Call Trace:
[ 1164.077624][    C0]  <IRQ>
[ 1164.077625][    C0]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[ 1164.077631][    C0]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[ 1164.077634][    C0]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[ 1164.077637][    C0]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[ 1164.077639][    C0]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[ 1164.077641][    C0]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[ 1164.077643][    C0]  ? save_trace (kernel/locking/lockdep.c:589)
[ 1164.077644][    C0]  ? ip_mc_msfilter (net/ipv4/igmp.c:2552)
[ 1164.077648][    C0]  mark_lock (kernel/locking/lockdep.c:4753)
[ 1164.077650][    C0]  mark_usage (kernel/locking/lockdep.c:4642)
[ 1164.077652][    C0]  __lock_acquire (kernel/locking/lockdep.c:5191)
[ 1164.077653][    C0]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[ 1164.077654][    C0]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[ 1164.077657][    C0]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[ 1164.077659][    C0]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 1164.077660][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 1164.077662][    C0]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[ 1164.077664][    C0]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[ 1164.077666][    C0]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 1164.077667][    C0] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 1164.077669][    C0]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[ 1164.077670][    C0]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[ 1164.077672][    C0]  rcu_do_batch (kernel/rcu/tree.c:2617)
[ 1164.077675][    C0]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[ 1164.077677][    C0]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[ 1164.077678][    C0]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[ 1164.077680][    C0]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[ 1164.077681][    C0]  rcu_core (kernel/rcu/tree.c:2869)
[ 1164.077683][    C0]  handle_softirqs (kernel/softirq.c:622)
[ 1164.077685][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 1164.077686][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[ 1164.077688][    C0]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[ 1164.077690][    C0]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[ 1164.077691][    C0]  irq_exit_rcu (kernel/softirq.c:752)
[ 1164.077693][    C0]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[ 1164.077694][    C0]  </IRQ>
[ 1164.077695][    C0]  <TASK>
[ 1164.077696][    C0]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[ 1164.077697][    C0] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 12) kernel/locking/spinlock.c:198 (discriminator 12))
[ 1164.077700][    C0] Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 61 10 9d fd 48 89 df e8 e9 66 9d fd f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f <bf> 01 00 00 00 e8 80 f4 8f fd 65 8b 05 29 1a 5e 02 85 c0 74 12 5b
All code
========
   0:	f5                   	cmc
   1:	53                   	push   %rbx
   2:	48 8b 74 24 10       	mov    0x10(%rsp),%rsi
   7:	48 89 fb             	mov    %rdi,%rbx
   a:	48 83 c7 18          	add    $0x18,%rdi
   e:	e8 61 10 9d fd       	call   0xfffffffffd9d1074
  13:	48 89 df             	mov    %rbx,%rdi
  16:	e8 e9 66 9d fd       	call   0xfffffffffd9d6704
  1b:	f7 c5 00 02 00 00    	test   $0x200,%ebp
  21:	75 1f                	jne    0x42
  23:	9c                   	pushf
  24:	58                   	pop    %rax
  25:	f6 c4 02             	test   $0x2,%ah
  28:	75 2f                	jne    0x59
  2a:*	bf 01 00 00 00       	mov    $0x1,%edi		<-- trapping instruction
  2f:	e8 80 f4 8f fd       	call   0xfffffffffd8ff4b4
  34:	65 8b 05 29 1a 5e 02 	mov    %gs:0x25e1a29(%rip),%eax        # 0x25e1a64
  3b:	85 c0                	test   %eax,%eax
  3d:	74 12                	je     0x51
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	bf 01 00 00 00       	mov    $0x1,%edi
   5:	e8 80 f4 8f fd       	call   0xfffffffffd8ff48a
   a:	65 8b 05 29 1a 5e 02 	mov    %gs:0x25e1a29(%rip),%eax        # 0x25e1a3a
  11:	85 c0                	test   %eax,%eax
  13:	74 12                	je     0x27
  15:	5b                   	pop    %rbx
[ 1164.077701][    C0] RSP: 0018:ffa00000004871b8 EFLAGS: 00000246
[ 1164.077703][    C0] RAX: 0000000000000092 RBX: ff11000001041440 RCX: ffffffff9ed78613
[ 1164.077704][    C0] RDX: ff110000090b8040 RSI: ffffffff9f693d1a RDI: ffffffff9f0727c0
[ 1164.077705][    C0] RBP: 0000000000000246 R08: 0000000000000000 R09: 0000000000000000
[ 1164.077706][    C0] R10: 0000000000000000 R11: 0000000000000001 R12: ff1100000dd1c468
[ 1164.077707][    C0] R13: 0000000000000000 R14: ffa0000000487200 R15: 0000000000000000
[ 1164.077709][    C0]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[ 1164.077711][    C0]  qlist_free_all (mm/kasan/quarantine.c:163 (discriminator 2) mm/kasan/quarantine.c:179 (discriminator 2))
[ 1164.077713][    C0]  kasan_quarantine_reduce (mm/kasan/quarantine.c:286)
[ 1164.077715][    C0]  __kasan_slab_alloc (mm/kasan/common.c:350)
[ 1164.077717][    C0]  kmem_cache_alloc_node_noprof (./include/linux/kasan.h:253 mm/slub.c:4570 mm/slub.c:4899 mm/slub.c:4951)
[ 1164.077720][    C0]  __alloc_skb (net/core/skbuff.c:702 (discriminator 7))
[ 1164.077722][    C0]  ? __alloc_skb (./include/linux/bottom_half.h:20 (discriminator 2) net/core/skbuff.c:695 (discriminator 2))
[ 1164.077724][    C0]  ? napi_skb_cache_get (./include/linux/local_lock_internal.h:61)
[ 1164.077725][    C0]  ? atomic_notifier_call_chain (./include/linux/rcupdate.h:871 kernel/notifier.c:224)
[ 1164.077727][    C0]  rtmsg_fib (./include/linux/skbuff.h:1386 ./include/net/netlink.h:1055 net/ipv4/fib_semantics.c:551)
[ 1164.077730][    C0]  ? fib_dump_info (net/ipv4/fib_semantics.c:1725)
[ 1164.077731][    C0]  ? ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
[ 1164.077735][    C0]  fib_table_delete (net/ipv4/fib_trie.c:1740 (discriminator 1))
[ 1164.077737][    C0]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 1164.077738][    C0]  ? fib_table_lookup (net/ipv4/fib_trie.c:1604)
[ 1164.077740][    C0]  ? lockdep_rtnl_is_held (./include/linux/lockdep.h:249 net/core/rtnetlink.c:182)
[ 1164.077742][    C0]  ? fib_get_table (net/ipv4/fib_frontend.c:124 (discriminator 2))
[ 1164.077744][    C0]  fib_magic (net/ipv4/fib_frontend.c:1136)
[ 1164.077746][    C0]  ? fib_new_table (net/ipv4/fib_frontend.c:88 (discriminator 1))
[ 1164.077750][    C0]  fib_del_ifaddr (net/ipv4/fib_frontend.c:1247 (discriminator 3))
[ 1164.077752][    C0]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[ 1164.077753][    C0]  fib_inetaddr_event (net/ipv4/fib_frontend.c:1478)
[ 1164.077755][    C0]  notifier_call_chain (kernel/notifier.c:85)
[ 1164.077757][    C0]  blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 1164.077759][    C0]  __inet_del_ifa (net/ipv4/devinet.c:450)
[ 1164.077761][    C0]  ? lockdep_rtnl_is_held (./include/linux/lockdep.h:249 net/core/rtnetlink.c:182)
[ 1164.077763][    C0]  inetdev_event (net/ipv4/devinet.c:487 net/ipv4/devinet.c:328 net/ipv4/devinet.c:1655)
[ 1164.077764][    C0]  ? mutex_is_locked (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.h:48 kernel/locking/mutex.c:65)
[ 1164.077767][    C0]  notifier_call_chain (kernel/notifier.c:85)
[ 1164.077769][    C0]  unregister_netdevice_many_notify (net/core/dev.c:2287 net/core/dev.c:2301 net/core/dev.c:12446)
[ 1164.077772][    C0]  ? unregister_netdevice_queued (./include/linux/list.h:404 (discriminator 3))
[ 1164.077774][    C0]  ? mutex_is_locked (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/locking/mutex.h:48 kernel/locking/mutex.c:65)
[ 1164.077775][    C0]  ? rtnl_is_locked (net/core/rtnetlink.c:169)
[ 1164.077777][    C0]  ? unregister_netdevice_queue (net/core/dev.c:12311 (discriminator 1))
[ 1164.077780][    C0]  default_device_exit_batch (net/core/dev.c:12507 net/core/dev.c:13099)
[ 1164.077782][    C0]  ? unregister_netdev (./include/net/net_namespace.h:419 (discriminator 7))
[ 1164.077785][    C0]  ? perf_trace_sched_switch (./include/linux/list.h:1021 (discriminator 3))
[ 1164.077787][    C0]  ? fou_exit_net (net/ipv4/fou_core.c:1228)
[ 1164.077791][    C0]  ops_undo_list (net/core/net_namespace.c:205 net/core/net_namespace.c:252)
[ 1164.077793][    C0]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[ 1164.077794][    C0]  ? netns_install (./include/linux/ns_common.h:26)
[ 1164.077795][    C0]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[ 1164.077797][    C0]  ? idr_destroy (lib/radix-tree.c:310 lib/radix-tree.c:674 lib/radix-tree.c:1563)
[ 1164.077800][    C0]  cleanup_net (net/core/net_namespace.c:702)
[ 1164.077802][    C0]  ? net_passive_dec (./include/linux/llist.h:241)
[ 1164.077803][    C0]  ? process_one_work (kernel/workqueue.c:3290 (discriminator 2))
[ 1164.077805][    C0]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[ 1164.077806][    C0]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 1164.077808][    C0]  process_one_work (kernel/workqueue.c:3314)
[ 1164.077811][    C0]  ? pwq_dec_nr_in_flight (kernel/workqueue.c:1822 (discriminator 4))
[ 1164.077813][    C0]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[ 1164.077815][    C0]  worker_thread (kernel/workqueue.c:3397 kernel/workqueue.c:3478)
[ 1164.077818][    C0]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[ 1164.077820][    C0]  ? __kthread_parkme (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 kernel/kthread.c:272)
[ 1164.077822][    C0]  ? rescuer_thread (./include/linux/list.h:404 (discriminator 3))
[ 1164.077823][    C0]  kthread (kernel/kthread.c:436)
[ 1164.077825][    C0]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[ 1164.077828][    C0]  ? kthread_affine_node (kernel/kthread.c:378)
[ 1164.077830][    C0]  ret_from_fork (arch/x86/kernel/process.c:158)
[ 1164.077833][    C0]  ? arch_exit_to_user_mode_prepare.isra.0 (arch/x86/entry/syscall_64.c:37)
[ 1164.077835][    C0]  ? __switch_to (arch/x86/kernel/process_64.c:403 arch/x86/kernel/process_64.c:663)
[ 1164.077837][    C0]  ? kthread_affine_node (kernel/kthread.c:378)


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock