======================================
| [ 1024.078649][T11755] rcu_scheduler_active = 2, debug_locks = 1
| [ 1024.078889][T11755] no locks held by mausezahn/11755.
| [ 1024.079058][T11755]
| [ 1024.079058][T11755] stack backtrace:
[ 1024.079604][T11755] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1024.079803][T11755] Call Trace:
[ 1024.079927][T11755]  <TASK>
[1024.080015][T11755] dump_stack_lvl (lib/dump_stack.c:123)
[1024.080190][T11755] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6846)
[1024.080356][T11755] dev_get_by_index_rcu (net/core/dev.c:876 (discriminator 7))
[1024.080525][T11755] ip6_create_rt_oif_rcu (net/ipv6/route.c:1223)
[1024.080687][T11755] ? ip6_route_output_flags (net/ipv6/route.c:2695)
[1024.080858][T11755] ip6_dst_lookup_tail.constprop.0 (net/ipv6/ip6_output.c:1160)
[1024.081064][T11755] ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1265)
[1024.081225][T11755] ? __pfx_ip6_dst_lookup_flow (net/ipv6/ip6_output.c:1260)
[1024.081385][T11755] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[1024.081571][T11755] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872)
[1024.081736][T11755] rawv6_sendmsg (net/ipv6/raw.c:899)
[1024.081900][T11755] ? rwsem_mark_wake (kernel/locking/rwsem.c:508 (discriminator 2))
[1024.082063][T11755] ? __pfx_rawv6_sendmsg (net/ipv6/raw.c:741)
[1024.082223][T11755] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[1024.082397][T11755] ? find_held_lock (kernel/locking/lockdep.c:5339)
[1024.082558][T11755] ? __lock_release (kernel/locking/lockdep.c:5525)
[1024.082717][T11755] ? __might_fault (mm/memory.c:6751 mm/memory.c:6744)
[1024.082893][T11755] ? __might_fault (mm/memory.c:6751 mm/memory.c:6744)
[1024.083053][T11755] ? __might_fault (mm/memory.c:6751 mm/memory.c:6744)
[1024.083237][T11755] ? __sys_sendto (net/socket.c:711 net/socket.c:726 net/socket.c:2208)
[1024.083433][T11755] __sys_sendto (net/socket.c:711 net/socket.c:726 net/socket.c:2208)
[1024.083593][T11755] ? __pfx___sys_sendto (net/socket.c:2175)
[1024.083758][T11755] ? __lock_release (kernel/locking/lockdep.c:5525)
[1024.083917][T11755] ? do_user_addr_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/mm.h:741 arch/x86/mm/fault.c:1340)
[1024.084076][T11755] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[1024.084244][T11755] ? __pfx___up_read (kernel/locking/rwsem.c:1337)
[1024.084418][T11755] ? ksys_write (fs/read_write.c:731)
[1024.084578][T11755] ? __pfx_ksys_write (fs/read_write.c:721)
[1024.084737][T11755] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:741 arch/x86/mm/fault.c:1340)
[1024.084902][T11755] __x64_sys_sendto (net/socket.c:2211)
[1024.085060][T11755] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406)
[1024.085256][T11755] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[1024.085424][T11755] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 1024.085621][T11755] RIP: 0033:0x7fa8d5f78a4a
[ 1024.085789][T11755] 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
[ 1024.086339][T11755] RSP: 002b:00007fff1a013108 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 1024.086583][T11755] RAX: ffffffffffffffda RBX: 000000000e95fec0 RCX: 00007fa8d5f78a4a
[ 1024.086822][T11755] RDX: 0000000000000050 RSI: 000000000e960190 RDI: 0000000000000005
[ 1024.087056][T11755] RBP: 000000000e95fec0 R08: 00007fff1a013110 R09: 000000000000001c
[ 1024.087322][T11755] 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