======================================
| [  420.307191] #PF: supervisor read access in kernel mode
| [  420.307217] #PF: error_code(0x0000) - not-present page
| [  420.307242] PGD 0
| [  420.307257] Oops: Oops: 0000 [#1] SMP
[  420.307323] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  420.307349] RIP: 0010:dst_dev_put (net/core/dst.c:149)
[  420.307371] Code: e8 57 56 29 00 0f 1f 80 00 00 00 00 f3 0f 1e fa 0f 1f 44 00 00 b8 02 00 00 00 55 48 8b 2f 53 48 89 fb 66 89 47 3a 48 8b 47 08 <48> 8b 40 38 48 85 c0 74 05 48 89 ee ff d0 48 c7 43 28 40 33 77 95
All code
========
   0:	e8 57 56 29 00       	call   0x29565c
   5:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
   c:	f3 0f 1e fa          	endbr64
  10:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  15:	b8 02 00 00 00       	mov    $0x2,%eax
  1a:	55                   	push   %rbp
  1b:	48 8b 2f             	mov    (%rdi),%rbp
  1e:	53                   	push   %rbx
  1f:	48 89 fb             	mov    %rdi,%rbx
  22:	66 89 47 3a          	mov    %ax,0x3a(%rdi)
  26:	48 8b 47 08          	mov    0x8(%rdi),%rax
  2a:*	48 8b 40 38          	mov    0x38(%rax),%rax		<-- trapping instruction
  2e:	48 85 c0             	test   %rax,%rax
  31:	74 05                	je     0x38
  33:	48 89 ee             	mov    %rbp,%rsi
  36:	ff d0                	call   *%rax
  38:	48 c7 43 28 40 33 77 	movq   $0xffffffff95773340,0x28(%rbx)
  3f:	95 

Code starting with the faulting instruction
===========================================
   0:	48 8b 40 38          	mov    0x38(%rax),%rax
   4:	48 85 c0             	test   %rax,%rax
   7:	74 05                	je     0xe
   9:	48 89 ee             	mov    %rbp,%rsi
   c:	ff d0                	call   *%rax
   e:	48 c7 43 28 40 33 77 	movq   $0xffffffff95773340,0x28(%rbx)
  15:	95 
[  420.307449] RSP: 0018:ff3cf7e9400fbd48 EFLAGS: 00010286
[  420.307477] RAX: 0000000000000001 RBX: ff1564dd85e80c00 RCX: 0000000000000003
[  420.307512] RDX: 0059930b17e363b0 RSI: ffffffffffffffff RDI: ff1564dd85e80c00
[  420.307545] RBP: ff1564dd85e80c80 R08: ff1564dd831d3ae0 R09: 0000000080550036
[  420.307576] R10: ff1564dd811da000 R11: ff1564dd831d3ae0 R12: ff1564dd85d294e8
[  420.307614] R13: ff3cf7e9400fbe08 R14: 0000000000000007 R15: 0000000000000000
[  420.307648] FS:  0000000000000000(0000) GS:ff1564de27ecc000(0000) knlGS:0000000000000000
[  420.307684] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  420.307713] CR2: 0000000000000039 CR3: 000000000d846005 CR4: 0000000000771ef0
[  420.307749] PKRU: 55555554
[  420.307765] Call Trace:
[  420.307777]  <TASK>
[  420.307791]  rt_fibinfo_free_cpus.part.0 (net/ipv4/fib_semantics.c:196)
[  420.307817]  fib_nh_common_release (net/ipv4/fib_semantics.c:207)
[  420.307844]  free_fib_info_rcu (./include/net/nexthop.h:480 net/ipv4/fib_semantics.c:229)
[  420.307864]  rcu_core (kernel/rcu/tree.c:2612 (discriminator 1) kernel/rcu/tree.c:2857 (discriminator 1))
[  420.307888]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[  420.307909]  ? sort_range (kernel/smpboot.c:103)
[  420.307929]  run_ksoftirqd (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/softirq.c:479 kernel/softirq.c:1064 kernel/softirq.c:1055)
[  420.307948]  smpboot_thread_fn (kernel/smpboot.c:160)
[  420.307967]  kthread (kernel/kthread.c:463)
[  420.307987]  ? kthreads_online_cpu (kernel/kthread.c:412)
[  420.308012]  ? kthreads_online_cpu (kernel/kthread.c:412)
[  420.308036]  ret_from_fork (arch/x86/kernel/process.c:164)
[  420.308057]  ? kthreads_online_cpu (kernel/kthread.c:412)


Finger prints:
dst_dev_put:fib_nh_common_release:free_fib_info_rcu:rcu_core:handle_softirqs