======================================
| [   13.181552][  T249] ip (249) used greatest stack depth: 23952 bytes left
| [   14.184659][  T272] ip (272) used greatest stack depth: 23856 bytes left
| [   29.761421][  T373] Oops: general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] SMP KASAN
| [   29.761787][  T373] KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
[   29.762277][  T373] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 29.762464][ T373] RIP: 0010:__mkroute_output (net/ipv4/route.c:2663) 
[ 29.762623][ T373] Code: 24 30 48 c1 ea 03 80 3c 02 00 0f 85 b2 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5c 24 18 48 8d 7b 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 84 06 00 00 48 8b 5b 58 49 8d 7f 10 48 b8 00 00
All code
========
   0:	24 30                	and    $0x30,%al
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   a:	0f 85 b2 06 00 00    	jne    0x6c2
  10:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  17:	fc ff df 
  1a:	49 8b 5c 24 18       	mov    0x18(%r12),%rbx
  1f:	48 8d 7b 58          	lea    0x58(%rbx),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
  2a:*	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)		<-- trapping instruction
  2e:	0f 85 84 06 00 00    	jne    0x6b8
  34:	48 8b 5b 58          	mov    0x58(%rbx),%rbx
  38:	49 8d 7f 10          	lea    0x10(%r15),%rdi
  3c:	48                   	rex.W
  3d:	b8                   	.byte 0xb8
	...

Code starting with the faulting instruction
===========================================
   0:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   4:	0f 85 84 06 00 00    	jne    0x68e
   a:	48 8b 5b 58          	mov    0x58(%rbx),%rbx
   e:	49 8d 7f 10          	lea    0x10(%r15),%rdi
  12:	48                   	rex.W
  13:	b8                   	.byte 0xb8
	...
[   29.763142][  T373] RSP: 0018:ffffc900007f7bf0 EFLAGS: 00010202
[   29.763329][  T373] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8420df2f
[   29.763549][  T373] RDX: 000000000000000b RSI: 0000000000000004 RDI: 0000000000000058
[   29.763771][  T373] RBP: ffff8880059d2608 R08: 0000000000000000 R09: fffffbfff0f0c967
[   29.763990][  T373] R10: ffffffff87864b3f R11: ffff8880075b95e0 R12: ffffc900007f7c90
[   29.764207][  T373] R13: ffff88800bcfd600 R14: 0000000090000000 R15: ffff88800c7c7540
[   29.764427][  T373] FS:  00007f7a736a2300(0000) GS:ffff8880afb17000(0000) knlGS:0000000000000000
[   29.764680][  T373] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   29.764868][  T373] CR2: 00007f7a73920062 CR3: 00000000093dd006 CR4: 0000000000772ef0
[   29.765091][  T373] PKRU: 55555554
[   29.765202][  T373] Call Trace:
[   29.765312][  T373]  <TASK>
[ 29.765389][ T373] ip_route_output_key_hash (net/ipv4/route.c:2701) 
[ 29.765537][ T373] ? ip_route_output_key_hash_rcu (net/ipv4/route.c:2688) 
[ 29.765723][ T373] __ip4_datagram_connect (./include/net/route.h:169 ./include/net/route.h:348 net/ipv4/datagram.c:49) 
[ 29.765873][ T373] ? inet_autobind (net/ipv4/af_inet.c:570) 
[ 29.766017][ T373] udp_connect (net/ipv4/udp.c:2153) 
[ 29.766131][ T373] __sys_connect (./include/linux/file.h:62 ./include/linux/file.h:83 net/socket.c:2095) 
[ 29.766277][ T373] ? __sys_connect_file (net/socket.c:2093) 
[ 29.766428][ T373] ? __sys_setsockopt (./include/linux/file.h:62 ./include/linux/file.h:83 net/socket.c:2361) 
[ 29.766573][ T373] __x64_sys_connect (net/socket.c:2108) 
[ 29.766721][ T373] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472) 
[ 29.766866][ T373] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 29.767010][ T373] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.767187][  T373] RIP: 0033:0x7f7a73938d77
[ 29.767342][ T373] Code: 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 18 89 54 24 0c 48 89 34 24 89
All code
========
   0:	64 89 01             	mov    %eax,%fs:(%rcx)
   3:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
   7:	c3                   	ret
   8:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   f:	00 00 00 
  12:	90                   	nop
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2a 00 00 00       	mov    $0x2a,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 18          	sub    $0x18,%rsp
  37:	89 54 24 0c          	mov    %edx,0xc(%rsp)
  3b:	48 89 34 24          	mov    %rsi,(%rsp)
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 18          	sub    $0x18,%rsp
   d:	89 54 24 0c          	mov    %edx,0xc(%rsp)
  11:	48 89 34 24          	mov    %rsi,(%rsp)
  15:	89                   	.byte 0x89
[   29.767863][  T373] RSP: 002b:00007ffde38fa968 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
[   29.768085][  T373] RAX: ffffffffffffffda RBX: 00007ffde38fc94f RCX: 00007f7a73938d77
[   29.768303][  T373] RDX: 0000000000000010 RSI: 00007ffde38fa9d0 RDI: 0000000000000007
[   29.768528][  T373] RBP: 00007ffde38fb020 R08: 00000000206f2710 R09: 0000000000000000
[   29.768751][  T373] R10: 00007f7a738305a0 R11: 0000000000000246 R12: 00007ffde38fb378


Finger prints:
__mkroute_output:ip_route_output_key_hash:__ip4_datagram_connect:udp_connect:__sys_connect