======================================
| [ 1186.175483] #PF: supervisor read access in kernel mode
| [ 1186.175518] #PF: error_code(0x0000) - not-present page
| [ 1186.175554] PGD 2de48067 P4D 2de48067 PUD 0
| [ 1186.175589] Oops: Oops: 0000 [#1] SMP
[ 1186.175673] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1186.175710] RIP: 0010:dst_dev_put (net/core/dst.c:149)
[ 1186.175741] Code: c4 28 5b c3 e8 b3 90 27 00 0f 1f 00 f3 0f 1e fa 0f 1f 44 00 00 b8 02 00 00 00 55 48 8b 2f 66 89 47 3a 48 8b 47 08 53 48 89 fb <48> 8b 40 38 48 85 c0 74 05 48 89 ee ff d0 48 c7 43 28 e0 15 f2 96
All code
========
   0:	c4                   	(bad)
   1:	28 5b c3             	sub    %bl,-0x3d(%rbx)
   4:	e8 b3 90 27 00       	call   0x2790bc
   9:	0f 1f 00             	nopl   (%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:	66 89 47 3a          	mov    %ax,0x3a(%rdi)
  22:	48 8b 47 08          	mov    0x8(%rdi),%rax
  26:	53                   	push   %rbx
  27:	48 89 fb             	mov    %rdi,%rbx
  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 e0 15 f2 	movq   $0xffffffff96f215e0,0x28(%rbx)
  3f:	96 

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 e0 15 f2 	movq   $0xffffffff96f215e0,0x28(%rbx)
  15:	96 
[ 1186.175849] RSP: 0018:ffffac4e400fbd50 EFLAGS: 00010282
[ 1186.175884] RAX: ffffffff00000000 RBX: ffff955607b64e40 RCX: 0000000000000002
[ 1186.175929] RDX: ffffffff9702f520 RSI: ffffffff97d61148 RDI: ffff955607b64e40
[ 1186.175973] RBP: 0000000000000001 R08: ffff955607ced970 R09: ffffffff967ca262
[ 1186.176017] R10: ffff955607ced300 R11: 00000000000002e6 R12: 000036f79947be60
[ 1186.176066] R13: 000036f79947be60 R14: ffff95563ed29c00 R15: 0000000000000000
[ 1186.176112] FS:  0000000000000000(0000) GS:ffff9556a6885000(0000) knlGS:0000000000000000
[ 1186.176161] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1186.176202] CR2: ffffffff00000038 CR3: 000000000977b002 CR4: 0000000000772ef0
[ 1186.176248] PKRU: 55555554
[ 1186.176267] Call Trace:
[ 1186.176283]  <TASK>
[ 1186.176302]  rt_fibinfo_free_cpus.part.0 (net/ipv4/fib_semantics.c:196)
[ 1186.176338]  fib_nh_common_release (net/ipv4/fib_semantics.c:207)
[ 1186.176372]  free_fib_info_rcu (./include/net/nexthop.h:480 (discriminator 3) net/ipv4/fib_semantics.c:229 (discriminator 3))
[ 1186.176400]  rcu_core (kernel/rcu/tree.c:2612 kernel/rcu/tree.c:2857)
[ 1186.176432]  ? rcu_core (kernel/rcu/tree.c:2531 kernel/rcu/tree.c:2857)
[ 1186.176457]  ? finish_task_switch.isra.0 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 kernel/sched/sched.h:1570 kernel/sched/core.c:4995 kernel/sched/core.c:5112)
[ 1186.176498]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[ 1186.176530]  ? sort_range (kernel/smpboot.c:103)
[ 1186.176560]  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)
[ 1186.176590]  smpboot_thread_fn (kernel/smpboot.c:160 (discriminator 3))
[ 1186.176620]  kthread (kernel/kthread.c:463)
[ 1186.176648]  ? kthreads_online_cpu (kernel/kthread.c:412)
[ 1186.176683]  ? kthreads_online_cpu (kernel/kthread.c:412)
[ 1186.176722]  ret_from_fork (arch/x86/kernel/process.c:164)
[ 1186.176750]  ? kthreads_online_cpu (kernel/kthread.c:412)


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