======================================
| [ 80.856555][ C3] #2: ffff8880057585d8 (&fsvq->lock){+.+.}-{3:3}, at: virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1434) 
| [ 80.856916][ C3] #3: ffffc90000290d60 ((&n->timer)){+.-.}-{0:0}, at: call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
| [   80.857278][    C3]
| [   80.857278][    C3] stack backtrace:
[   80.857526][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   80.857528][    C3] Call Trace:
[   80.857530][    C3]  <IRQ>
[ 80.857533][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 80.857541][ C3] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848) 
[ 80.857551][ C3] __icmp_send (./include/net/net_namespace.h:404 ./include/linux/netdevice.h:2669 net/ipv4/icmp.c:616) 
[ 80.857565][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5228) 
[ 80.857570][ C3] ? __pfx___icmp_send (net/ipv4/icmp.c:596) 
[ 80.857586][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 80.857591][ C3] ? validate_chain (kernel/locking/lockdep.c:3799 kernel/locking/lockdep.c:3819 kernel/locking/lockdep.c:3874) 
[ 80.857603][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3862) 
[ 80.857608][ C3] ? 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:230) 
[ 80.857611][ C3] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[ 80.857638][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5228) 
[ 80.857647][ C3] ipv4_send_dest_unreach (net/ipv4/route.c:1241) 
[ 80.857655][ C3] ? neigh_invalidate (net/core/neighbour.c:1008) 
[ 80.857660][ C3] ? __pfx_ipv4_send_dest_unreach (net/ipv4/route.c:1215) 
[ 80.857674][ C3] ipv4_link_failure (./include/linux/skbuff.h:1152 ./include/net/route.h:88 net/ipv4/route.c:1250) 
[ 80.857681][ C3] arp_error_report (./include/net/dst.h:429 net/ipv4/arp.c:296) 
[ 80.857687][ C3] neigh_invalidate (net/core/neighbour.c:1008) 
[ 80.857697][ C3] neigh_timer_handler (net/core/neighbour.c:1109 (discriminator 2)) 
[ 80.857706][ C3] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) 
[ 80.857710][ C3] call_timer_fn (kernel/time/timer.c:1789) 
[ 80.857713][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 80.857716][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) 
[ 80.857720][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1766) 
[ 80.857724][ C3] ? 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:230) 
[ 80.857732][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4323) 
[ 80.857744][ C3] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414) 
[ 80.857748][ C3] ? __pfx_neigh_timer_handler (net/core/neighbour.c:1032) 
[ 80.857759][ C3] ? __pfx___run_timers (kernel/time/timer.c:2385) 
[ 80.857761][ C3] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 80.857772][ C3] ? 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) 
[ 80.857777][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 80.857780][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[ 80.857783][ C3] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 80.857794][ C3] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) 
[ 80.857799][ C3] handle_softirqs (kernel/softirq.c:561) 
[ 80.857812][ C3] __irq_exit_rcu (kernel/softirq.c:596 kernel/softirq.c:435 kernel/softirq.c:662) 
[ 80.857815][ C3] irq_exit_rcu (kernel/softirq.c:680) 
[ 80.857818][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   80.857824][    C3]  </IRQ>
[   80.857825][    C3]  <TASK>
[ 80.857827][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 80.857832][ C3] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 80.857838][ C3] Code: 10 e8 01 f2 63 fd 48 89 ef e8 49 62 64 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 95 5f 2b 48 <74> 0e 5b 5d c3 cc cc cc cc e8 df e8 89 fd eb dc 0f 1f 44 00 00 5b
All code
========
   0:	10 e8                	adc    %ch,%al
   2:	01 f2                	add    %esi,%edx
   4:	63 fd                	movsxd %ebp,%edi
   6:	48 89 ef             	mov    %rbp,%rdi
   9:	e8 49 62 64 fd       	call   0xfffffffffd646257
   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 95 5f 2b 48 	decl   %gs:0x482b5f95(%rip)        # 0x482b5fbf
  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 df e8 89 fd       	call   0xfffffffffd89e917
  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 df e8 89 fd       	call   0xfffffffffd89e8ed
   e:	eb dc                	jmp    0xffffffffffffffec
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	5b                   	pop    %rbx
[   80.857840][    C3] RSP: 0000:ffffc900013d7050 EFLAGS: 00000286
[   80.857843][    C3] RAX: 0000000000000002 RBX: 0000000000000200 RCX: 1ffffffff75e9d9c
[   80.857846][    C3] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb7d86781
[   80.857847][    C3] RBP: ffff888001040f40 R08: 0000000000000001 R09: fffffbfff75e69e8
[   80.857849][    C3] R10: ffffffffbaf34f47 R11: ffff8880097cc5c0 R12: ffff888001040f40
[   80.857851][    C3] R13: ffffea00002fee00 R14: ffff888001043240 R15: ffff88800bfbb800
[ 80.857863][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 80.857872][ C3] get_partial_node.part.0 (mm/slub.c:2870) 
[ 80.857883][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 80.857888][ C3] ___slab_alloc (mm/slub.c:2831 mm/slub.c:2948 mm/slub.c:3806) 
[ 80.857890][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 80.857894][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 80.857896][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 80.857900][ C3] ? ___slab_alloc (mm/slub.c:3658) 
[ 80.857908][ C3] ? page_cache_ra_unbounded (./include/linux/fs.h:932 mm/readahead.c:299) 
[ 80.857910][ C3] ? filemap_fault (mm/filemap.c:3292 mm/filemap.c:3433) 
[ 80.857914][ C3] ? __do_fault (mm/memory.c:4977) 
[ 80.857918][ C3] ? do_pte_missing (mm/memory.c:5392 mm/memory.c:5526 mm/memory.c:4047) 
[ 80.857921][ C3] ? handle_pte_fault (mm/memory.c:5889) 
[ 80.857924][ C3] ? __handle_mm_fault (mm/memory.c:6032) 
[ 80.857931][ C3] ? virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 80.857935][ C3] ? __kmalloc_noprof (mm/slub.c:3916 mm/slub.c:3991 mm/slub.c:4152 mm/slub.c:4293 mm/slub.c:4306) 
[ 80.857938][ C3] __kmalloc_noprof (mm/slub.c:3916 mm/slub.c:3991 mm/slub.c:4152 mm/slub.c:4293 mm/slub.c:4306) 
[ 80.857948][ C3] virtqueue_add_split (drivers/virtio/virtio_ring.c:493 drivers/virtio/virtio_ring.c:564) 
[ 80.857952][ C3] ? usage_skip (kernel/locking/lockdep.c:2316) 
[ 80.857966][ C3] ? __pfx_virtqueue_add_split (drivers/virtio/virtio_ring.c:538) 
[ 80.857973][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:49 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 80.857976][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 80.857987][ C3] virtqueue_add_sgs (drivers/virtio/virtio_ring.c:2282 drivers/virtio/virtio_ring.c:2316) 
[ 80.857999][ C3] virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1441) 
[ 80.858013][ C3] ? __pfx_virtio_fs_enqueue_req (fs/fuse/virtio_fs.c:1377) 
[ 80.858026][ C3] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[ 80.858033][ C3] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 80.858036][ C3] ? fuse_get_unique (fs/fuse/dev.c:222) 
[ 80.858041][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 80.858044][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 80.858050][ C3] ? 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) 
[ 80.858055][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 80.858060][ C3] ? fuse_get_unique (fs/fuse/dev.c:222) 
[ 80.858065][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 80.858074][ C3] virtio_fs_send_req (fs/fuse/virtio_fs.c:1500) 
[ 80.858077][ C3] ? fuse_send_one (fs/fuse/dev.c:305) 
[ 80.858084][ C3] flush_bg_queue (fs/fuse/dev.c:323) 
[ 80.858096][ C3] fuse_request_queue_background (./include/linux/spinlock.h:391 fs/fuse/dev.c:617) 
[ 80.858105][ C3] fuse_simple_background (fs/fuse/dev.c:642) 
[ 80.858111][ C3] fuse_send_readpages (fs/fuse/file.c:993) 
[ 80.858122][ C3] fuse_readahead (fs/fuse/file.c:1031) 
[ 80.858139][ C3] ? __pfx_fuse_readahead (fs/fuse/file.c:1004) 
[ 80.858146][ C3] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 80.858149][ C3] ? __folio_batch_add_and_move (./include/linux/local_lock_internal.h:38 mm/swap.c:201) 
[ 80.858154][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 80.858157][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[ 80.858169][ C3] read_pages (mm/readahead.c:161) 
[ 80.858172][ C3] ? __folio_batch_add_and_move (./include/linux/local_lock_internal.h:38 mm/swap.c:201) 
[ 80.858183][ C3] ? __pfx_read_pages (mm/readahead.c:148) 
[ 80.858204][ C3] page_cache_ra_unbounded (./include/linux/fs.h:932 mm/readahead.c:299) 
[ 80.858218][ C3] filemap_fault (mm/filemap.c:3292 mm/filemap.c:3433) 
[ 80.858225][ C3] ? __lock_release (kernel/locking/lockdep.c:5527) 
[ 80.858228][ C3] ? do_fault_around (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 mm/memory.c:5353) 
[ 80.858232][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 80.858237][ C3] ? __pfx_filemap_fault (mm/filemap.c:3406) 
[ 80.858248][ C3] ? do_fault_around (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 mm/memory.c:5353) 
[ 80.858251][ C3] ? __pfx_filemap_map_pages (mm/filemap.c:3767) 
[ 80.858260][ C3] __do_fault (mm/memory.c:4977) 
[ 80.858266][ C3] do_pte_missing (mm/memory.c:5392 mm/memory.c:5526 mm/memory.c:4047) 
[ 80.858269][ C3] ? handle_pte_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/pgtable.h:136 mm/memory.c:5883) 
[ 80.858277][ C3] handle_pte_fault (mm/memory.c:5889) 
[ 80.858284][ C3] ? __pfx_handle_pte_fault (mm/memory.c:5846) 
[ 80.858298][ C3] __handle_mm_fault (mm/memory.c:6032) 
[ 80.858303][ C3] ? __pfx___handle_mm_fault (mm/memory.c:5941) 
[ 80.858320][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[ 80.858325][ C3] ? __pfx_lock_vma_under_rcu (mm/memory.c:6357) 
[ 80.858333][ C3] handle_mm_fault (mm/memory.c:6213) 
[ 80.858338][ C3] ? __pfx_handle_mm_fault (mm/memory.c:6168) 
[ 80.858344][ C3] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4639) 
[ 80.858347][ C3] ? trace_rcu_segcb_stats (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:570 ./include/linux/cpumask.h:1116 ./include/trace/events/rcu.h:537) 
[ 80.858356][ C3] do_user_addr_fault (arch/x86/mm/fault.c:1338) 
[ 80.858370][ C3] exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:147 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539) 
[ 80.858376][ C3] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[   80.858379][    C3] RIP: 0033:0x7f98580f4248
[ 80.858383][ C3] Code: ff ff 66 0f 6f 0c 0e 66 0f 73 d8 0e 66 0f 73 db 0e e9 3c 01 00 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 66 0f ef c0 66 0f 6f 17 <66> 0f 6f 0e 66 0f 74 c1 66 0f 73 fa 01 66 0f 74 d1 66 0f f8 d0 66
All code
========
   0:	ff                   	(bad)
   1:	ff 66 0f             	jmp    *0xf(%rsi)
   4:	6f                   	outsl  %ds:(%rsi),(%dx)
   5:	0c 0e                	or     $0xe,%al
   7:	66 0f 73 d8 0e       	psrldq $0xe,%xmm0
   c:	66 0f 73 db 0e       	psrldq $0xe,%xmm3
  11:	e9 3c 01 00 00       	jmp    0x152
  16:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  1d:	00 00 00 00 
  21:	90                   	nop
  22:	66 0f ef c0          	pxor   %xmm0,%xmm0
  26:	66 0f 6f 17          	movdqa (%rdi),%xmm2
  2a:*	66 0f 6f 0e          	movdqa (%rsi),%xmm1		<-- trapping instruction
  2e:	66 0f 74 c1          	pcmpeqb %xmm1,%xmm0
  32:	66 0f 73 fa 01       	pslldq $0x1,%xmm2
  37:	66 0f 74 d1          	pcmpeqb %xmm1,%xmm2
  3b:	66 0f f8 d0          	psubb  %xmm0,%xmm2
  3f:	66                   	data16

Code starting with the faulting instruction
===========================================
   0:	66 0f 6f 0e          	movdqa (%rsi),%xmm1
   4:	66 0f 74 c1          	pcmpeqb %xmm1,%xmm0
   8:	66 0f 73 fa 01       	pslldq $0x1,%xmm2
   d:	66 0f 74 d1          	pcmpeqb %xmm1,%xmm2
  11:	66 0f f8 d0          	psubb  %xmm0,%xmm2
  15:	66                   	data16
[   80.858385][    C3] RSP: 002b:00007ffe2cac0ba8 EFLAGS: 00010212
[   80.858387][    C3] RAX: 000000000000000b RBX: 00007f9857d8080c RCX: 000000000000000c
[   80.858389][    C3] RDX: 000000000000ffff RSI: 00007f9857d80800 RDI: 00007f98580588b0
[   80.858390][    C3] RBP: 00007f98580588bb R08: 0000000000000000 R09: fffffffffffdaea8
[   80.858392][    C3] R10: 00007f98580f4240 R11: 0000000000000246 R12: 0000000000000000


Finger prints:
lockdep_rcu_suspicious:__icmp_send:ipv4_send_dest_unreach:ipv4_link_failure:arp_error_report