R13: 0000000000000000 R14: 00007f0d700d69c8 R15: 00007f0d700d6b38
BUG: unable to handle kernel NULL pointer dereference at 0000000000000040
IP: free_fib_info_rcu+0x31d/0x3e0 net/ipv4/fib_semantics.c:223
PGD 686be067 
P4D 686be067 
PUD 66421067 
PMD 0 

Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 7449 Comm: udevd Not tainted 4.13.0-rc4-next-20170811 #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
task: ffff8800556f4340 task.stack: ffff88005dc60000
RIP: 0010:free_fib_info_rcu+0x31d/0x3e0 net/ipv4/fib_semantics.c:223
RSP: 0000:ffff88003ed07a68 EFLAGS: 00010206
RAX: ffff8800556f4340 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000100 RSI: ffff88003e3708c0 RDI: ffff88003e370908
RBP: ffff88003ed07ac8 R08: ffffffff815bb922 R09: 0000000000000000
R10: ffff88003ed079a8 R11: ffffffff85b34b00 R12: ffff88003ed07d48
R13: ffff88003e370920 R14: dffffc0000000000 R15: ffff88003ed07d88
FS:  00007fe405d097a0(0000) GS:ffff88003ed00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000040 CR3: 0000000061392000 CR4: 00000000000006e0
DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_reclaim kernel/rcu/rcu.h:195 [inline]
 rcu_do_batch kernel/rcu/tree.c:2666 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2920 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2887 [inline]
 rcu_process_callbacks+0xd3e/0x17b0 kernel/rcu/tree.c:2904
 __do_softirq+0x2f5/0xba3 kernel/softirq.c:284
 invoke_softirq kernel/softirq.c:364 [inline]
 irq_exit+0x1cc/0x200 kernel/softirq.c:405
 exiting_irq arch/x86/include/asm/apic.h:638 [inline]
 smp_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:1044
 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:577
 </IRQ>
RIP: 0010:unwind_next_frame.part.6+0x26/0xc70 arch/x86/kernel/unwind_frame.c:255
RSP: 0000:ffff88005dc67630 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff10
RAX: 1ffff1000bb8cede RBX: ffff88005dc676b8 RCX: ffff88005dc67708
RDX: dffffc0000000000 RSI: ffff88005dc67738 RDI: ffff88005dc676b8
RBP: ffff88005dc67658 R08: ffff88005dc676f8 R09: ffff88005dc676b8
R10: ffff88005dc67630 R11: ffffed000bb8cee1 R12: ffff88005dc67590
R13: ffffed000bb8ced8 R14: dffffc0000000000 R15: ffff88005dc67730
 unwind_next_frame arch/x86/include/asm/stacktrace.h:38 [inline]
 __unwind_start+0x169/0x330 arch/x86/kernel/unwind_frame.c:380
 unwind_start arch/x86/include/asm/unwind.h:50 [inline]
 __save_stack_trace+0x4a/0xd0 arch/x86/kernel/stacktrace.c:43
 save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59
 save_stack+0x43/0xd0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
 slab_post_alloc_hook mm/slab.h:444 [inline]
 slab_alloc mm/slab.c:3397 [inline]
 kmem_cache_alloc+0x11b/0x760 mm/slab.c:3559
 ptlock_alloc+0x24/0x70 mm/memory.c:4509
 ptlock_init include/linux/mm.h:1687 [inline]
 pgtable_page_ctor include/linux/mm.h:1721 [inline]
 pte_alloc_one+0x59/0x100 arch/x86/mm/pgtable.c:31
 do_read_fault mm/memory.c:3420 [inline]
 do_fault mm/memory.c:3566 [inline]
 handle_pte_fault mm/memory.c:3796 [inline]
 __handle_mm_fault+0x3770/0x3980 mm/memory.c:3921
 handle_mm_fault+0x3bb/0x940 mm/memory.c:3958
 __do_page_fault+0x4f6/0xb60 arch/x86/mm/fault.c:1445
 trace_do_page_fault+0x141/0x730 arch/x86/mm/fault.c:1538
 do_async_page_fault+0x72/0xc0 arch/x86/kernel/kvm.c:266
 async_page_fault+0x28/0x30 arch/x86/entry/entry_64.S:1097
RIP: 0033:0x406eab
RSP: 002b:00007fff12254fd0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000e06030 RCX: 0000000000000001
RDX: 00007fe4056c6e40 RSI: 00007fe405135240 RDI: 00007fe4056c56c0
RBP: 0000000000625500 R08: 0000000000000bcf R09: 0000000000000bcf
R10: 00007fe405135240 R11: 00007fe405d097a0 R12: 0000000000e2d0a0
R13: 00007fff122564d0 R14: 0000000000000000 R15: 0000000000e2d5e0
Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 46 48 8b 45 a8 48 8b 58 f0 48 81 fb c0 3b 3f 85 74 18 e8 73 19 56 fd <f0> ff 4b 40 75 0d e8 68 19 56 fd 48 89 df e8 80 ea 89 fd e8 5b 
RIP: free_fib_info_rcu+0x31d/0x3e0 net/ipv4/fib_semantics.c:223 RSP: ffff88003ed07a68
CR2: 0000000000000040
---[ end trace aa12df87faae13de ]---