======================================
| [4321.257592][T10649] #0: ffffffffaf259eb0 (cb_lock){++++}-{3:3}, at: genl_rcv (net/netlink/genetlink.c:1219) 
| [4321.257909][T10649] #1: ffffffffaf202548 (rtnl_mutex){+.+.}-{3:3}, at: netdev_nl_napi_set_doit (net/core/netdev-genl.c:350) 
| [ 4321.258270][T10649]
| [ 4321.258270][T10649] stack backtrace:
[ 4321.258857][T10649] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4321.259105][T10649] Call Trace:
[ 4321.259249][T10649]  <TASK>
[4321.259349][T10649] dump_stack_lvl (lib/dump_stack.c:123) 
[4321.259556][T10649] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[4321.259759][T10649] napi_by_id (net/core/dev.c:6300 (discriminator 7)) 
[4321.259911][T10649] netdev_nl_napi_set_doit (net/core/netdev-genl.c:350) 
[4321.260102][T10649] ? __pfx_netdev_nl_napi_set_doit (net/core/netdev-genl.c:338) 
[4321.260345][T10649] ? __nla_parse (lib/nlattr.c:732) 
[4321.260536][T10649] ? genl_family_rcv_msg_attrs_parse.constprop.0 (net/netlink/genetlink.c:947) 
[4321.260820][T10649] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[4321.261018][T10649] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[4321.261259][T10649] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[4321.261447][T10649] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[4321.261643][T10649] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[4321.261861][T10649] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[4321.262058][T10649] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[4321.262251][T10649] ? __pfx_netdev_nl_napi_set_doit (net/core/netdev-genl.c:338) 
[4321.262501][T10649] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[4321.262701][T10649] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[4321.262893][T10649] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[4321.263092][T10649] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[4321.263302][T10649] ? genl_rcv (net/netlink/genetlink.c:1219) 
[4321.263457][T10649] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[4321.263654][T10649] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[4321.263854][T10649] genl_rcv (net/netlink/genetlink.c:1220) 
[4321.264000][T10649] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[4321.264197][T10649] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[4321.264395][T10649] ? __wake_up (kernel/sched/wait.c:110 kernel/sched/wait.c:127) 
[4321.264550][T10649] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[4321.264747][T10649] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[4321.264941][T10649] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) 
[4321.265104][T10649] __sys_sendto (net/socket.c:729 net/socket.c:744 net/socket.c:2216) 
[4321.265297][T10649] ? __pfx___sys_sendto (net/socket.c:2186) 
[4321.265504][T10649] ? __pfx___schedule (kernel/sched/core.c:6546) 
[4321.265695][T10649] ? rseq_update_cpu_node_id (kernel/rseq.c:109 (discriminator 10)) 
[4321.265893][T10649] ? __rseq_handle_notify_resume (kernel/rseq.c:333) 
[4321.266127][T10649] ? do_user_addr_fault (./include/linux/mmap_lock.h:172 arch/x86/mm/fault.c:1417) 
[4321.266319][T10649] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316) 
[4321.266561][T10649] __x64_sys_sendto (net/socket.c:2224) 
[4321.266753][T10649] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[4321.266991][T10649] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[4321.267185][T10649] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4321.267424][T10649] RIP: 0033:0x7f1f529e0700
[ 4321.267613][T10649] Code: ff ff 64 89 02 eb bd 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 1d 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 68 c3 0f 1f 80 00 00 00 00 41 54 48 83 ec 20
All code
========
   0:	ff                   	(bad)
   1:	ff 64 89 02          	jmp    *0x2(%rcx,%rcx,4)
   5:	eb bd                	jmp    0xffffffffffffffc4
   7:	0f 1f 00             	nopl   (%rax)
   a:	f3 0f 1e fa          	endbr64
   e:	41 89 ca             	mov    %ecx,%r10d
  11:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  18:	00 
  19:	85 c0                	test   %eax,%eax
  1b:	75 1d                	jne    0x3a
  1d:	45 31 c9             	xor    %r9d,%r9d
  20:	45 31 c0             	xor    %r8d,%r8d
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 68                	ja     0x9a
  32:	c3                   	ret
  33:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  3a:	41 54                	push   %r12
  3c:	48 83 ec 20          	sub    $0x20,%rsp

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 68                	ja     0x70
   8:	c3                   	ret
   9:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  10:	41 54                	push   %r12
  12:	48 83 ec 20          	sub    $0x20,%rsp
[ 4321.268242][T10649] RSP: 002b:00007ffe78d1d358 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 4321.268518][T10649] RAX: ffffffffffffffda RBX: 00007ffe78d1d370 RCX: 00007f1f529e0700
[ 4321.268795][T10649] RDX: 0000000000000034 RSI: 00007f1f5284d270 RDI: 0000000000000005
[ 4321.269071][T10649] RBP: 00007f1f5284d010 R08: 0000000000000000 R09: 0000000000000000
[ 4321.269340][T10649] R10: 0000000000000000 R11: 0000000000000246 R12: 000000003c79d2f0


Finger prints:
lockdep_rcu_suspicious:napi_by_id:netdev_nl_napi_set_doit:genl_family_rcv_msg_doit:genl_family_rcv_msg