======================================
| [    4.787750] ------------[ cut here ]------------
| [    4.787799] rcuref - imbalanced put()
| [    4.787799] WARNING: lib/rcuref.c:266 at 0x0, CPU#0: swapper/0/0
| [    4.787855] Modules linked in: vxlan act_gact cls_flower sch_ingress
[    4.787951] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    4.787990] RIP: 0010:rcuref_put_slowpath (lib/rcuref.c:266 (discriminator 4))
[    4.788022] Code: c0 75 0d c3 81 fe ff ff ff bf 77 0f 85 f6 78 03 31 c0 c3 c7 07 00 00 00 a0 eb f5 48 83 ec 08 48 89 3c 24 48 8d 3d 30 04 4a 01 <67> 48 0f b9 3a 48 8b 14 24 31 c0 c7 02 00 00 00 e0 48 83 c4 08 c3
All code
========
   0:	c0 75 0d c3          	shlb   $0xc3,0xd(%rbp)
   4:	81 fe ff ff ff bf    	cmp    $0xbfffffff,%esi
   a:	77 0f                	ja     0x1b
   c:	85 f6                	test   %esi,%esi
   e:	78 03                	js     0x13
  10:	31 c0                	xor    %eax,%eax
  12:	c3                   	ret
  13:	c7 07 00 00 00 a0    	movl   $0xa0000000,(%rdi)
  19:	eb f5                	jmp    0x10
  1b:	48 83 ec 08          	sub    $0x8,%rsp
  1f:	48 89 3c 24          	mov    %rdi,(%rsp)
  23:	48 8d 3d 30 04 4a 01 	lea    0x14a0430(%rip),%rdi        # 0x14a045a
  2a:*	67 48 0f b9 3a       	ud1    (%edx),%rdi		<-- trapping instruction
  2f:	48 8b 14 24          	mov    (%rsp),%rdx
  33:	31 c0                	xor    %eax,%eax
  35:	c7 02 00 00 00 e0    	movl   $0xe0000000,(%rdx)
  3b:	48 83 c4 08          	add    $0x8,%rsp
  3f:	c3                   	ret

Code starting with the faulting instruction
===========================================
   0:	67 48 0f b9 3a       	ud1    (%edx),%rdi
   5:	48 8b 14 24          	mov    (%rsp),%rdx
   9:	31 c0                	xor    %eax,%eax
   b:	c7 02 00 00 00 e0    	movl   $0xe0000000,(%rdx)
  11:	48 83 c4 08          	add    $0x8,%rsp
  15:	c3                   	ret
[    4.788112] RSP: 0018:ff1d68b140003e78 EFLAGS: 00010296
[    4.788143] RAX: 00000000dfffffff RBX: ff12dbcf86e40080 RCX: ff12dbcf832e3a80
[    4.788179] RDX: 003c8ce10d435790 RSI: 00000000dfffffff RDI: ffffffff8be7e6f0
[    4.788218] RBP: ff12dbcf86e40070 R08: ff12dbcf86dd5030 R09: 0000000080550053
[    4.788256] R10: ff12dbcf811da000 R11: ff12dbcf86dd5030 R12: ff12dbcf86e400e8
[    4.788299] R13: ff1d68b140003f40 R14: 0000000000000014 R15: 0000000000000000
[    4.788344] FS:  0000000000000000(0000) GS:ff12dbd0327cc000(0000) knlGS:0000000000000000
[    4.788390] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.788424] CR2: 00007f9b50337000 CR3: 0000000008409001 CR4: 0000000000771ef0
[    4.788474] PKRU: 55555554
[    4.788489] Call Trace:
[    4.788503]  <IRQ>
[    4.788517]  dst_release_immediate (./arch/x86/include/asm/preempt.h:95 (discriminator 1) ./include/linux/rcuref.h:174 (discriminator 1) net/core/dst.c:184 (discriminator 1))
[    4.788550]  rt_fibinfo_free_cpus.part.0 (net/ipv4/fib_semantics.c:196)
[    4.788578]  fib_nh_common_release (net/ipv4/fib_semantics.c:207)
[    4.788615]  free_fib_info_rcu (./include/net/nexthop.h:480 net/ipv4/fib_semantics.c:229)
[    4.788640]  rcu_core (kernel/rcu/tree.c:2612 (discriminator 1) kernel/rcu/tree.c:2857 (discriminator 1))
[    4.788665]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[    4.788691]  irq_exit_rcu (kernel/softirq.c:657 kernel/softirq.c:496 kernel/softirq.c:723 kernel/softirq.c:739)
[    4.788713]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1056 (discriminator 47) arch/x86/kernel/apic/apic.c:1056 (discriminator 47))
[    4.788747]  </IRQ>
[    4.788762]  <TASK>
[    4.788781]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[    4.788812] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82)
[    4.788839] Code: 48 8b 3d 74 3a 44 01 e8 1f 00 00 00 48 2b 05 28 a1 60 00 c3 0f 1f 80 00 00 00 00 f3 0f 1e fa eb 07 0f 00 2d a5 b8 21 00 fb f4 <c3> 0f 1f 40 d6 8b 17 89 d6 83 e6 fe 0f 01 f9 66 90 48 c1 e2 20 48
All code
========
   0:	48 8b 3d 74 3a 44 01 	mov    0x1443a74(%rip),%rdi        # 0x1443a7b
   7:	e8 1f 00 00 00       	call   0x2b
   c:	48 2b 05 28 a1 60 00 	sub    0x60a128(%rip),%rax        # 0x60a13b
  13:	c3                   	ret
  14:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1b:	f3 0f 1e fa          	endbr64
  1f:	eb 07                	jmp    0x28
  21:	0f 00 2d a5 b8 21 00 	verw   0x21b8a5(%rip)        # 0x21b8cd
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	0f 1f 40 d6          	nopl   -0x2a(%rax)
  2f:	8b 17                	mov    (%rdi),%edx
  31:	89 d6                	mov    %edx,%esi
  33:	83 e6 fe             	and    $0xfffffffe,%esi
  36:	0f 01 f9             	rdtscp
  39:	66 90                	xchg   %ax,%ax
  3b:	48 c1 e2 20          	shl    $0x20,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	0f 1f 40 d6          	nopl   -0x2a(%rax)
   5:	8b 17                	mov    (%rdi),%edx
   7:	89 d6                	mov    %edx,%esi
   9:	83 e6 fe             	and    $0xfffffffe,%esi
   c:	0f 01 f9             	rdtscp
   f:	66 90                	xchg   %ax,%ax
  11:	48 c1 e2 20          	shl    $0x20,%rdx
  15:	48                   	rex.W
[    4.788929] RSP: 0018:ffffffff8bc03e80 EFLAGS: 00000206
[    4.788955] RAX: ff12dbd0327cc000 RBX: ffffffff8bc11980 RCX: 0000000000000000
[    4.789001] RDX: 4000000000000000 RSI: 0000000000000000 RDI: 00000000000640a4
[    4.789049] RBP: 0000000000000000 R08: 00000000000640a4 R09: ff12dbcfbec24990
[    4.789089] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
[    4.789131] R13: 0000000000000000 R14: ffffffff8bc11098 R15: 0000000000014770
[    4.789173]  default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:767)
[    4.789196]  default_idle_call (./include/linux/cpuidle.h:144 kernel/sched/idle.c:123)
[    4.789215]  do_idle (kernel/sched/idle.c:192 kernel/sched/idle.c:332)
[    4.789236]  cpu_startup_entry (kernel/sched/idle.c:429)
[    4.789263]  rest_init (init/main.c:757)
[    4.789285]  start_kernel (init/main.c:1111)
[    4.789310]  x86_64_start_reservations (arch/x86/kernel/head64.c:310)
[    4.789341]  x86_64_start_kernel (??:?)


Finger prints:
rcuref_put_slowpath:dst_release_immediate:fib_nh_common_release:free_fib_info_rcu:rcu_core