======================================
| [  547.720925][    C2] rcu_scheduler_active = 2, debug_locks = 1
| [  547.721283][    C2] no locks held by mausezahn/5344.
| [  547.721583][    C2]
| [  547.721583][    C2] stack backtrace:
[  547.721913][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  547.721915][    C2] Call Trace:
[  547.721918][    C2]  <IRQ>
[ 547.721920][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 547.721930][ C2] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6866) 
[ 547.721940][ C2] veth_xdp_rcv (drivers/net/veth.c:907 (discriminator 9)) 
[ 547.721946][ C2] ? __kernel_text_address (kernel/extable.c:79) 
[ 547.721952][ C2] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 547.721958][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 547.721968][ C2] ? __pfx_veth_xdp_rcv (drivers/net/veth.c:899) 
[ 547.721979][ C2] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 547.721984][ C2] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877) 
[ 547.721992][ C2] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 547.721998][ C2] veth_poll (drivers/net/veth.c:977) 
[ 547.722003][ C2] ? __pfx_veth_poll (drivers/net/veth.c:965) 
[ 547.722006][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5235) 
[ 547.722017][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 547.722022][ C2] ? debug_object_activate (lib/debugobjects.c:837) 
[ 547.722027][ C2] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 547.722034][ C2] ? 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) 
[ 547.722038][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 547.722044][ C2] ? debug_object_activate (lib/debugobjects.c:837) 
[ 547.722055][ C2] __napi_poll.constprop.0 (net/core/dev.c:7413) 
[ 547.722060][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 547.722067][ C2] net_rx_action (net/core/dev.c:7477 net/core/dev.c:7599) 
[ 547.722079][ C2] ? __pfx_net_rx_action (net/core/dev.c:7561) 
[ 547.722081][ C2] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 547.722087][ C2] ? lock_downgrade (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./arch/x86/include/asm/irqflags.h:159 kernel/locking/lockdep.c:5763) 
[ 547.722100][ C2] ? clockevents_program_event (kernel/time/clockevents.c:334 (discriminator 3)) 
[ 547.722106][ C2] ? hrtimer_interrupt (kernel/time/hrtimer.c:1900) 
[ 547.722115][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 547.722125][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:908 net/core/dev.c:4740) 
[ 547.722129][ C2] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[  547.722134][    C2]  </IRQ>
[  547.722135][    C2]  <TASK>
[ 547.722137][ C2] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 547.722141][ C2] ? __dev_queue_xmit (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:908 net/core/dev.c:4740) 
[ 547.722143][ C2] __dev_queue_xmit (net/core/dev.c:4741) 
[ 547.722146][ C2] ? _copy_from_iter (./arch/x86/include/asm/uaccess_64.h:126 ./arch/x86/include/asm/uaccess_64.h:141 lib/iov_iter.c:55 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:300 ./include/linux/iov_iter.h:328 lib/iov_iter.c:249 lib/iov_iter.c:260) 
[ 547.722150][ C2] ? page_cache_async_ra (mm/readahead.c:677) 
[ 547.722162][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4621) 
[ 547.722166][ C2] ? packet_parse_headers (./include/linux/skbuff.h:3114 net/packet/af_packet.c:1992) 
[ 547.722175][ C2] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2923) 
[ 547.722182][ C2] ? __pfx_packet_parse_headers (net/packet/af_packet.c:1977) 
[ 547.722187][ C2] ? skb_copy_datagram_from_iter (net/core/datagram.c:565) 
[ 547.722199][ C2] packet_snd (net/packet/af_packet.c:3131) 
[ 547.722213][ C2] ? __pfx_packet_snd (net/packet/af_packet.c:2995) 
[ 547.722218][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 547.722227][ C2] ? __might_fault (mm/memory.c:7151 mm/memory.c:7145) 
[ 547.722236][ C2] __sys_sendto (net/socket.c:712 net/socket.c:727 net/socket.c:2180) 
[ 547.722243][ C2] ? __pfx___sys_sendto (net/socket.c:2147) 
[ 547.722256][ C2] ? sock_ioctl (net/socket.c:1314) 
[ 547.722263][ C2] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 547.722267][ C2] ? do_user_addr_fault (./include/linux/mmap_lock.h:212 arch/x86/mm/fault.c:1416) 
[ 547.722278][ C2] ? do_user_addr_fault (./include/linux/mmap_lock.h:212 arch/x86/mm/fault.c:1416) 
[ 547.722285][ C2] __x64_sys_sendto (net/socket.c:2183) 
[ 547.722289][ C2] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:198 arch/x86/entry/syscall_64.c:90) 
[ 547.722293][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 547.722297][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 547.722302][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  547.722306][    C2] RIP: 0033:0x7fa0c32f7a4a
[ 547.722310][ C2] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89
All code
========
   0:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   4:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   b:	eb b8                	jmp    0xffffffffffffffc5
   d:	0f 1f 00             	nopl   (%rax)
  10:	f3 0f 1e fa          	endbr64
  14:	41 89 ca             	mov    %ecx,%r10d
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 15                	jne    0x38
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 7e                	ja     0xb0
  32:	c3                   	ret
  33:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  38:	41 54                	push   %r12
  3a:	48 83 ec 30          	sub    $0x30,%rsp
  3e:	44                   	rex.R
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 7e                	ja     0x86
   8:	c3                   	ret
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 54                	push   %r12
  10:	48 83 ec 30          	sub    $0x30,%rsp
  14:	44                   	rex.R
  15:	89                   	.byte 0x89
[  547.722312][    C2] RSP: 002b:00007fffbec67408 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[  547.722316][    C2] RAX: ffffffffffffffda RBX: 0000000011e529d0 RCX: 00007fa0c32f7a4a
[  547.722318][    C2] RDX: 000000000000002a RSI: 0000000011e52c92 RDI: 0000000000000006
[  547.722320][    C2] RBP: 0000000011e52c92 R08: 00007fffbec67410 R09: 0000000000000014
[  547.722322][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000


Finger prints:
lockdep_rcu_suspicious:veth_xdp_rcv:veth_poll:net_rx_action:handle_softirqs