======================================
| [   33.627575][  T278] veth02: entered allmulticast mode
| [   33.629471][  T278] veth02: entered promiscuous mode
| [   33.940788][    C1] BUG: spinlock bad magic on CPU#1, ip/279
| [ 33.941009][ C1] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: ip/279, .owner_cpu: 1 
[   33.941508][    C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.941840][    C1] Call Trace:
[   33.941954][    C1]  <IRQ>
[ 33.942033][ C1] dump_stack_lvl (lib/dump_stack.c:122) 
[ 33.942186][ C1] do_raw_spin_unlock (kernel/locking/spinlock_debug.c:100 kernel/locking/spinlock_debug.c:141) 
[ 33.942334][ C1] _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 33.942487][ C1] __dev_xmit_skb (./include/net/sch_generic.h:226 ./include/net/sch_generic.h:217 net/core/dev.c:3879) 
[ 33.942634][ C1] ? __pfx___dev_xmit_skb (net/core/dev.c:3784) 
[ 33.942782][ C1] ? __dev_queue_xmit (./include/linux/bottom_half.h:20 ./include/linux/rcupdate.h:890 net/core/dev.c:4348) 
[ 33.942925][ C1] ? lock_acquire (kernel/locking/lockdep.c:5732) 
[ 33.943077][ C1] ? __dev_queue_xmit (./include/linux/bottom_half.h:20 ./include/linux/rcupdate.h:890 net/core/dev.c:4348) 
[ 33.943224][ C1] __dev_queue_xmit (net/core/dev.c:4389) 
[ 33.943369][ C1] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 33.943512][ C1] ? ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) 
[ 33.943660][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 33.943805][ C1] ? __pfx___dev_queue_xmit (net/core/dev.c:4332) 
[ 33.943950][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4273) 
[ 33.944098][ C1] ? eth_header (net/ethernet/eth.c:100) 
[ 33.944249][ C1] ? neigh_resolve_output (./include/linux/netdevice.h:3159 net/core/neighbour.c:1560 net/core/neighbour.c:1545) 
[ 33.944400][ C1] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) 
[ 33.944545][ C1] ? igmpv3_send_cr (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/ipv4/igmp.c:719) 
[ 33.944693][ C1] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) 
[ 33.944838][ C1] ? __ip_finish_output (./include/linux/skbuff.h:1666 ./include/linux/skbuff.h:4954 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) 
[ 33.944984][ C1] igmp_ifc_timer_expire (net/ipv4/igmp.c:815) 
[ 33.945137][ C1] ? __pfx_igmp_ifc_timer_expire (net/ipv4/igmp.c:809) 
[ 33.945316][ C1] call_timer_fn (kernel/time/timer.c:1792) 
[ 33.945464][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1782) 
[ 33.945701][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1782) 
[ 33.945845][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1769) 
[ 33.945988][ C1] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 33.946137][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4273) 
[ 33.946373][ C1] __run_timers (kernel/time/timer.c:1844 kernel/time/timer.c:2417) 
[ 33.946516][ C1] ? __pfx_igmp_ifc_timer_expire (net/ipv4/igmp.c:809) 
[ 33.946696][ C1] ? __pfx___run_timers (kernel/time/timer.c:2388) 
[ 33.946843][ C1] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 33.947086][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.947232][ C1] ? lock_acquire (kernel/locking/lockdep.c:5732) 
[ 33.947375][ C1] ? run_timer_softirq (kernel/time/timer.c:2428 kernel/time/timer.c:2421 kernel/time/timer.c:2437 kernel/time/timer.c:2447) 
[ 33.947520][ C1] run_timer_softirq (kernel/time/timer.c:2429 kernel/time/timer.c:2421 kernel/time/timer.c:2437 kernel/time/timer.c:2447) 
[ 33.947674][ C1] handle_softirqs (kernel/softirq.c:554) 
[ 33.947823][ C1] irq_exit_rcu (kernel/softirq.c:589 kernel/softirq.c:428 kernel/softirq.c:637 kernel/softirq.c:649) 
[ 33.947932][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1043 arch/x86/kernel/apic/apic.c:1043) 
[   33.948078][    C1]  </IRQ>
[   33.948156][    C1]  <TASK>
[ 33.948233][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 33.948504][ C1] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 33.948691][ C1] Code: 10 e8 01 3e 8e fd 48 89 ef e8 a9 ae 8e fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d 75 80 c2 6f <74> 0e 5b 5d c3 cc cc cc cc e8 6f 8c b5 fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	01 3e                	add    %edi,(%rsi)
   4:	8e fd                	mov    %ebp,%?
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 a9 ae 8e fd       	call   0xfffffffffd8eaeb7
   e:	81 e3 00 02 00 00    	and    $0x200,%ebx
  14:	75 1d                	jne    0x33
  16:	9c                   	pushf
  17:	58                   	pop    %rax
  18:	f6 c4 02             	test   $0x2,%ah
  1b:	75 29                	jne    0x46
  1d:	48 85 db             	test   %rbx,%rbx
  20:	74 01                	je     0x23
  22:	fb                   	sti
  23:	65 ff 0d 75 80 c2 6f 	decl   %gs:0x6fc28075(%rip)        # 0x6fc2809f
  2a:*	74 0e                	je     0x3a		<-- trapping instruction
  2c:	5b                   	pop    %rbx
  2d:	5d                   	pop    %rbp
  2e:	c3                   	ret
  2f:	cc                   	int3
  30:	cc                   	int3
  31:	cc                   	int3
  32:	cc                   	int3
  33:	e8 6f 8c b5 fd       	call   0xfffffffffdb58ca7
  38:	eb dc                	jmp    0x16
  3a:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3f:	5b                   	pop    %rbx

Code starting with the faulting instruction
===========================================
   0:	74 0e                	je     0x10
   2:	5b                   	pop    %rbx
   3:	5d                   	pop    %rbp
   4:	c3                   	ret
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	cc                   	int3
   9:	e8 6f 8c b5 fd       	call   0xfffffffffdb58c7d
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[   33.949308][    C1] RSP: 0018:ffffc900005bf888 EFLAGS: 00000286
[   33.949505][    C1] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff26f4243
[   33.949722][    C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff90414821
[   33.949941][    C1] RBP: ffff88800266c040 R08: 0000000000000001 R09: fffffbfff26f2101
[   33.950158][    C1] R10: ffffffff9379080f R11: ffffc900005bf6b9 R12: ffff888002bce720
[   33.950384][    C1] R13: 0000000000000000 R14: ffffc900005bf8d8 R15: ffff8880047d7788
[ 33.950700][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 33.950881][ C1] qlist_free_all (mm/kasan/quarantine.c:174) 
[ 33.951028][ C1] kasan_quarantine_reduce (./include/linux/srcu.h:320 mm/kasan/quarantine.c:287) 
[ 33.951266][ C1] __kasan_slab_alloc (mm/kasan/common.c:322) 
[ 33.951412][ C1] kmem_cache_alloc_noprof (./include/linux/kasan.h:201 mm/slub.c:3988 mm/slub.c:4037 mm/slub.c:4044) 
[ 33.951560][ C1] p9_tag_alloc (net/9p/client.c:288) 
[ 33.951704][ C1] ? __pfx_p9_tag_alloc (net/9p/client.c:280) 
[ 33.951939][ C1] p9_client_prepare_req (net/9p/client.c:644) 
[ 33.952089][ C1] ? __pfx_p9_client_prepare_req (net/9p/client.c:628) 
[ 33.952269][ C1] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 33.952413][ C1] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 33.952651][ C1] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.952761][ C1] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 33.952905][ C1] p9_client_rpc (net/9p/client.c:691 (discriminator 4)) 
[ 33.953050][ C1] ? __pfx_p9_client_rpc (net/9p/client.c:675) 
[ 33.953194][ C1] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.953432][ C1] ? v9fs_dir_release (./include/net/9p/client.h:271 fs/9p/vfs_dir.c:224) 
[ 33.953578][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 33.953724][ C1] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) 
[ 33.953869][ C1] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 33.954112][ C1] p9_client_clunk (net/9p/client.c:1441 (discriminator 3)) 
[ 33.954257][ C1] v9fs_dir_release (./include/net/9p/client.h:280 fs/9p/vfs_dir.c:224) 
[ 33.954401][ C1] __fput (fs/file_table.c:422) 
[ 33.954514][ C1] task_work_run (kernel/task_work.c:222 (discriminator 1)) 
[ 33.954663][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.954848][ C1] ? __pfx_task_work_run (kernel/task_work.c:190) 
[ 33.954993][ C1] ? kmem_cache_free (mm/slub.c:4473 mm/slub.c:4548) 
[ 33.955139][ C1] do_exit (kernel/exit.c:883) 
[ 33.955250][ C1] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 33.955395][ C1] ? __pfx_do_exit (kernel/exit.c:821) 
[ 33.955539][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.955688][ C1] do_group_exit (kernel/exit.c:1012) 
[ 33.955832][ C1] __x64_sys_exit_group (kernel/exit.c:1040) 
[ 33.956071][ C1] x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:61) 
[ 33.956218][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.956364][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.956543][    C1] RIP: 0033:0x7effe836aa8d
[ 33.956788][ C1] Code: Unable to access opcode bytes at 0x7effe836aa63.

Code starting with the faulting instruction
===========================================
[   33.956974][    C1] RSP: 002b:00007ffccad8b798 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   33.957193][    C1] RAX: ffffffffffffffda RBX: 00007effe84479c0 RCX: 00007effe836aa8d
[   33.957503][    C1] RDX: 00000000000000e7 RSI: fffffffffffffe90 RDI: 0000000000000000
[   33.957731][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000060
[   33.957948][    C1] R10: 00007effe8257fa8 R11: 0000000000000246 R12: 00007effe84479c0


Finger prints:
do_raw_spin_unlock:_raw_spin_unlock:__dev_xmit_skb:__dev_queue_xmit:ip_finish_output2