======================================
| xx__-> [ 1640.184816] ------------[ cut here ]------------
| [ 1640.184863] rcuref - imbalanced put()
| [ 1640.184863] WARNING: lib/rcuref.c:266 at 0x0, CPU#1: ksoftirqd/1/22
| [ 1640.184923] Modules linked in: sch_etf sch_fq vxcan can_dev xfrm_interface ip_gre macsec ipvlan act_tunnel_key bareudp mpls_gso mpls_iptunnel mpls_router ip6_gre gre nft_chain_nat xt_nat cls_bpf xt_conntrack sctp_diag sctp drop_monitor netdevsim act_mirred cls_u32 ifb openvswitch psample nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nsh cls_matchall xfrm_user xt_policy ip6t_REJECT nf_reject_ipv6 nft_compat nf_tables act_gact cls_flower sch_ingress vxlan [last unloaded: ila]
[ 1640.185214] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1640.185252] RIP: 0010:rcuref_put_slowpath (lib/rcuref.c:266 (discriminator 4))
[ 1640.185294] 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
[ 1640.185393] RSP: 0018:ff2488d8c00cfd40 EFLAGS: 00010282
[ 1640.185424] RAX: 00000000dfffffff RBX: ff1bf58389a06480 RCX: ff1bf58381e85480
[ 1640.185469] RDX: 003a935492c3dc78 RSI: 00000000dfffffff RDI: ffffffff9167e6f0
[ 1640.185508] RBP: ff1bf58389a06470 R08: ff1bf58383067840 R09: 0000000080550043
[ 1640.185543] R10: ff1bf583811da000 R11: ff1bf58383067840 R12: ff1bf58389a064e8
[ 1640.185580] R13: ff2488d8c00cfe08 R14: 0000000000000004 R15: 0000000000000000
[ 1640.185633] FS:  0000000000000000(0000) GS:ff1bf5842d04c000(0000) knlGS:0000000000000000
[ 1640.185677] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1640.185711] CR2: 00007f69bbf21a88 CR3: 0000000030246001 CR4: 0000000000771ef0
[ 1640.185750] PKRU: 55555554
[ 1640.185765] Call Trace:
[ 1640.185789]  <TASK>
[ 1640.185806]  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))
[ 1640.185838]  rt_fibinfo_free_cpus.part.0 (net/ipv4/fib_semantics.c:196)
[ 1640.185870]  fib_nh_common_release (net/ipv4/fib_semantics.c:207)
[ 1640.185899]  free_fib_info_rcu (./include/net/nexthop.h:480 net/ipv4/fib_semantics.c:229)
[ 1640.185922]  rcu_core (kernel/rcu/tree.c:2612 (discriminator 1) kernel/rcu/tree.c:2857 (discriminator 1))
[ 1640.185946]  handle_softirqs (./arch/x86/include/asm/jump_label.h:37 ./include/trace/events/irq.h:142 kernel/softirq.c:623)
[ 1640.185972]  ? sort_range (kernel/smpboot.c:103)
[ 1640.185995]  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)
[ 1640.186021]  smpboot_thread_fn (kernel/smpboot.c:160)
[ 1640.186046]  kthread (kernel/kthread.c:463)
[ 1640.186069]  ? kthreads_online_cpu (kernel/kthread.c:412)
[ 1640.186101]  ? kthreads_online_cpu (kernel/kthread.c:412)
[ 1640.186133]  ret_from_fork (arch/x86/kernel/process.c:164)
[ 1640.186156]  ? kthreads_online_cpu (kernel/kthread.c:412)


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