======================================
| [ 3717.438808][T28160] rcu_scheduler_active = 2, debug_locks = 1
| [ 3717.439133][T28160] no locks held by mausezahn/28160.
| [ 3717.439297][T28160]
| [ 3717.439297][T28160] stack backtrace:
[ 3717.439784][T28160] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 3717.439989][T28160] Call Trace:
[ 3717.440116][T28160]  <TASK>
[3717.440200][T28160] dump_stack_lvl (lib/dump_stack.c:123)
[3717.440370][T28160] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6846)
[3717.440532][T28160] dev_get_by_index_rcu (net/core/dev.c:876 (discriminator 7))
[3717.440691][T28160] ip6_create_rt_oif_rcu (net/ipv6/route.c:1223)
[3717.440848][T28160] ? ip6_route_output_flags (net/ipv6/route.c:2695)
[3717.441015][T28160] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1160)
[3717.441217][T28160] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1265)
[3717.441373][T28160] ? __pfx_ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260)
[3717.441532][T28160] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[3717.441689][T28160] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872)
[3717.441852][T28160] rawv6_sendmsg (net/ipv6/raw.c:899)
[3717.442016][T28160] ? rwsem_mark_wake (kernel/locking/rwsem.c:508 (discriminator 2))
[3717.442178][T28160] ? __pfx_rawv6_sendmsg (net/ipv6/raw.c:741)
[3717.442337][T28160] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[3717.442510][T28160] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860)
[3717.442674][T28160] ? find_held_lock (kernel/locking/lockdep.c:5339)
[3717.442833][T28160] ? __lock_release (kernel/locking/lockdep.c:5525)
[3717.442988][T28160] ? __might_fault (mm/memory.c:6751 mm/memory.c:6744)
[3717.443158][T28160] ? __might_fault (mm/memory.c:6751 mm/memory.c:6744)
[3717.443315][T28160] ? __might_fault (mm/memory.c:6751 mm/memory.c:6744)
[3717.443476][T28160] ? __sys_sendto (net/socket.c:711 net/socket.c:726 net/socket.c:2208)
[3717.443631][T28160] __sys_sendto (net/socket.c:711 net/socket.c:726 net/socket.c:2208)
[3717.443787][T28160] ? __pfx___sys_sendto (net/socket.c:2175)
[3717.443949][T28160] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[3717.444105][T28160] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[3717.444268][T28160] ? rseq_update_cpu_node_id (kernel/rseq.c:109 (discriminator 10))
[3717.444433][T28160] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316)
[3717.444632][T28160] ? __local_bh_enable (kernel/softirq.c:350)
[3717.444797][T28160] __x64_sys_sendto (net/socket.c:2211)
[3717.444954][T28160] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406)
[3717.445149][T28160] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[3717.445313][T28160] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 3717.445510][T28160] RIP: 0033:0x7f628f4a9a4a
[ 3717.445676][T28160] 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
[ 3717.446268][T28160] RSP: 002b:00007ffc3009ea28 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 3717.446523][T28160] RAX: ffffffffffffffda RBX: 000000003883bec0 RCX: 00007f628f4a9a4a
[ 3717.446782][T28160] RDX: 0000000000000050 RSI: 000000003883c190 RDI: 0000000000000005
[ 3717.447023][T28160] RBP: 000000003883bec0 R08: 00007ffc3009ea30 R09: 000000000000001c
[ 3717.447267][T28160] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000050


Finger prints:
lockdep_rcu_suspicious:dev_get_by_index_rcu:ip6_create_rt_oif_rcu:ip6_dst_lookup_flow:rawv6_sendmsg