======================================
| [  597.883855] #PF: supervisor read access in kernel mode
| [  597.883888] #PF: error_code(0x0000) - not-present page
| [  597.883915] PGD 7958067 P4D 7958067 PUD 23b3067 PMD 0
| [  597.883953] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
[  597.884039] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  597.884104] RIP: 0010:__inet_csk_reqsk_queue_drop (net/ipv4/inet_connection_sock.c:1042 net/ipv4/inet_connection_sock.c:1058) 
[ 597.884149] Code: 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 41 56 41 55 45 31 ed 41 54 55 48 89 f5 53 <48> 83 7e 70 00 89 d3 74 35 48 8b 46 30 49 89 fc 48 8b 90 40 03 00
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	00 0f                	add    %cl,(%rdi)
   4:	1f                   	(bad)
   5:	40 00 90 90 90 90 90 	rex add %dl,-0x6f6f6f70(%rax)
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1c:	41 56                	push   %r14
  1e:	41 55                	push   %r13
  20:	45 31 ed             	xor    %r13d,%r13d
  23:	41 54                	push   %r12
  25:	55                   	push   %rbp
  26:	48 89 f5             	mov    %rsi,%rbp
  29:	53                   	push   %rbx
  2a:*	48 83 7e 70 00       	cmpq   $0x0,0x70(%rsi)		<-- trapping instruction
  2f:	89 d3                	mov    %edx,%ebx
  31:	74 35                	je     0x68
  33:	48 8b 46 30          	mov    0x30(%rsi),%rax
  37:	49 89 fc             	mov    %rdi,%r12
  3a:	48                   	rex.W
  3b:	8b                   	.byte 0x8b
  3c:	90                   	nop
  3d:	40 03 00             	rex add (%rax),%eax

Code starting with the faulting instruction
===========================================
   0:	48 83 7e 70 00       	cmpq   $0x0,0x70(%rsi)
   5:	89 d3                	mov    %edx,%ebx
   7:	74 35                	je     0x3e
   9:	48 8b 46 30          	mov    0x30(%rsi),%rax
   d:	49 89 fc             	mov    %rdi,%r12
  10:	48                   	rex.W
  11:	8b                   	.byte 0x8b
  12:	90                   	nop
  13:	40 03 00             	rex add (%rax),%eax
[  597.884248] RSP: 0018:ffffb69540124e68 EFLAGS: 00010246
[  597.884279] RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000140048b40
[  597.884324] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8d6044896300
[  597.884369] RBP: 0000000000000000 R08: 000000000000014b R09: ffff8d607ed1d1e8
[  597.884414] R10: 000000000000014a R11: ffffb69540124ff8 R12: 0000000000000000
[  597.884471] R13: 0000000000000000 R14: dead000000000122 R15: ffff8d6044896300
[  597.884512] FS:  0000000000000000(0000) GS:ffff8d607ed00000(0000) knlGS:0000000000000000
[  597.884556] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  597.884593] CR2: 0000000000000070 CR3: 000000000390c001 CR4: 0000000000772ef0
[  597.884633] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  597.884677] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  597.884716] PKRU: 55555554
[  597.884729] Call Trace:
[  597.884748]  <IRQ>
[  597.884770] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434) 
[  597.884803] ? page_fault_oops (arch/x86/mm/fault.c:715) 
[  597.884831] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539) 
[  597.884856] ? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[  597.884885] ? __inet_csk_reqsk_queue_drop (net/ipv4/inet_connection_sock.c:1042 net/ipv4/inet_connection_sock.c:1058) 
[  597.884916] reqsk_timer_handler (./include/net/request_sock.h:148 net/ipv4/inet_connection_sock.c:1194) 
[  597.884948] ? __pfx_reqsk_timer_handler (net/ipv4/inet_connection_sock.c:1085) 
[  597.884979] ? __pfx_reqsk_timer_handler (net/ipv4/inet_connection_sock.c:1085) 
[  597.885011] call_timer_fn (kernel/time/timer.c:1794) 
[  597.885038] __run_timer_base.part.0 (kernel/time/timer.c:1846 kernel/time/timer.c:2419 kernel/time/timer.c:2430) 
[  597.885071] ? __pfx_tick_nohz_handler (kernel/time/tick-sched.c:285) 
[  597.885102] ? __hrtimer_run_queues (kernel/time/hrtimer.c:1706 kernel/time/hrtimer.c:1755) 
[  597.885134] ? lapic_timer_shutdown (arch/x86/kernel/apic/apic.c:445) 
[  597.885166] ? clockevents_switch_state (kernel/time/clockevents.c:131 kernel/time/clockevents.c:151) 
[  597.885198] run_timer_softirq (kernel/time/timer.c:2437 kernel/time/timer.c:2449) 
[  597.885223] handle_softirqs (kernel/softirq.c:554) 
[  597.885250] irq_exit_rcu (kernel/softirq.c:589 kernel/softirq.c:428 kernel/softirq.c:637 kernel/softirq.c:649) 
[  597.885276] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1037 arch/x86/kernel/apic/apic.c:1037) 
[  597.885314]  </IRQ>
[  597.885332]  <TASK>
[  597.885345] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[  597.885380] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:743) 
[ 597.885405] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d e3 09 28 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
All code
========
   0:	4c 01 c7             	add    %r8,%rdi
   3:	4c 29 c2             	sub    %r8,%rdx
   6:	e9 72 ff ff ff       	jmp    0xffffffffffffff7d
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d e3 09 28 00 	verw   0x2809e3(%rip)        # 0x280a0b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	fa                   	cli		<-- trapping instruction
  2b:	c3                   	ret
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00 
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	fa                   	cli
   1:	c3                   	ret
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	cc                   	int3
   6:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   d:	00 00 00 00 
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[  597.885526] RSP: 0018:ffffb695400bbee8 EFLAGS: 00000252
[  597.885561] RAX: ffff8d607ed00000 RBX: ffff8d6041301700 RCX: 00000000000006e0
[  597.885606] RDX: 0000000000000002 RSI: ffffffff8ba834b5 RDI: 00000000065e15ec
[  597.885645] RBP: 0000000000000002 R08: 00000000065e15ec R09: 0000000000000001
[  597.885685] R10: 0000000000000001 R11: 0000000000000008 R12: 0000000000000000
[  597.885724] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[  597.885764] default_idle_call (./include/linux/cpuidle.h:144 kernel/sched/idle.c:118) 
[  597.885789] do_idle (kernel/sched/idle.c:186 kernel/sched/idle.c:326) 
[  597.885816] cpu_startup_entry (kernel/sched/idle.c:423 (discriminator 1)) 
[  597.885843] start_secondary (arch/x86/kernel/smpboot.c:314) 


Finger prints:
__inet_csk_reqsk_queue_drop:reqsk_timer_handler:call_timer_fn:run_timer_softirq:handle_softirqs