======================================
| [ 4230.575266][ T7386] #0: ffffffffba459670 (cb_lock){++++}-{3:3}, at: genl_rcv (net/netlink/genetlink.c:1219) 
| [ 4230.575544][ T7386] #1: ffffffffba402408 (rtnl_mutex){+.+.}-{3:3}, at: netdev_nl_napi_set_doit (net/core/netdev-genl.c:350) 
| [ 4230.575846][ T7386]
| [ 4230.575846][ T7386] stack backtrace:
[ 4230.576345][ T7386] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4230.576554][ T7386] Call Trace:
[ 4230.576690][ T7386]  <TASK>
[ 4230.576779][ T7386] dump_stack_lvl (lib/dump_stack.c:123) 
[ 4230.576958][ T7386] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6822) 
[ 4230.577148][ T7386] napi_by_id (net/core/dev.c:6300 (discriminator 7)) 
[ 4230.577285][ T7386] netdev_nl_napi_set_doit (net/core/netdev-genl.c:350) 
[ 4230.577457][ T7386] ? __pfx_netdev_nl_napi_set_doit (net/core/netdev-genl.c:338) 
[ 4230.577708][ T7386] ? __nla_parse (lib/nlattr.c:732) 
[ 4230.577883][ T7386] ? genl_family_rcv_msg_attrs_parse.constprop.0 (net/netlink/genetlink.c:947) 
[ 4230.578143][ T7386] genl_family_rcv_msg_doit (net/netlink/genetlink.c:1115) 
[ 4230.578311][ T7386] ? __pfx_genl_family_rcv_msg_doit (net/netlink/genetlink.c:1088) 
[ 4230.578530][ T7386] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 4230.578700][ T7386] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5790) 
[ 4230.578880][ T7386] ? validate_chain (kernel/locking/lockdep.c:3797 kernel/locking/lockdep.c:3817 kernel/locking/lockdep.c:3872) 
[ 4230.579058][ T7386] genl_family_rcv_msg (net/netlink/genetlink.c:1195) 
[ 4230.579229][ T7386] ? __pfx_genl_family_rcv_msg (net/netlink/genetlink.c:1160) 
[ 4230.579401][ T7386] ? __pfx_netdev_nl_napi_set_doit (net/core/netdev-genl.c:338) 
[ 4230.579622][ T7386] genl_rcv_msg (net/netlink/genetlink.c:65 net/netlink/genetlink.c:1211) 
[ 4230.579794][ T7386] netlink_rcv_skb (net/netlink/af_netlink.c:2536) 
[ 4230.579965][ T7386] ? __pfx_genl_rcv_msg (net/netlink/genetlink.c:1201) 
[ 4230.580142][ T7386] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2513) 
[ 4230.580326][ T7386] ? genl_rcv (net/netlink/genetlink.c:1219) 
[ 4230.580460][ T7386] ? __pfx_down_read (kernel/locking/rwsem.c:1522) 
[ 4230.580637][ T7386] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[ 4230.580818][ T7386] genl_rcv (net/netlink/genetlink.c:1220) 
[ 4230.580944][ T7386] netlink_unicast (net/netlink/af_netlink.c:1316 net/netlink/af_netlink.c:1342) 
[ 4230.581116][ T7386] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1327) 
[ 4230.581295][ T7386] ? __wake_up (kernel/sched/wait.c:110 kernel/sched/wait.c:127) 
[ 4230.581431][ T7386] netlink_sendmsg (net/netlink/af_netlink.c:1886) 
[ 4230.581612][ T7386] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1805) 
[ 4230.581788][ T7386] ? fdget (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1114 fs/file.c:1128) 
[ 4230.581927][ T7386] __sys_sendto (net/socket.c:729 net/socket.c:744 net/socket.c:2216) 
[ 4230.582099][ T7386] ? __pfx___sys_sendto (net/socket.c:2186) 
[ 4230.582283][ T7386] ? do_user_addr_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 4230.582452][ T7386] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) 
[ 4230.582625][ T7386] ? __up_read (./arch/x86/include/asm/atomic64_64.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2749 ./include/linux/atomic/atomic-long.h:184 ./include/linux/atomic/atomic-instrumented.h:3317 kernel/locking/rwsem.c:1345) 
[ 4230.582796][ T7386] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 4230.582967][ T7386] ? __pfx___up_read (kernel/locking/rwsem.c:1337) 
[ 4230.583141][ T7386] ? do_user_addr_fault (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 4230.583315][ T7386] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:729 arch/x86/mm/fault.c:1340) 
[ 4230.583489][ T7386] __x64_sys_sendto (net/socket.c:2224) 
[ 4230.583660][ T7386] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 4230.583873][ T7386] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 4230.584050][ T7386] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 4230.584260][ T7386] RIP: 0033:0x7fcea59c9700
[ 4230.584447][ T7386] Code: Unable to access opcode bytes at 0x7fcea59c96d6.

Code starting with the faulting instruction
===========================================
[ 4230.584664][ T7386] RSP: 002b:00007fff3e762178 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 4230.584922][ T7386] RAX: ffffffffffffffda RBX: 00007fff3e762190 RCX: 00007fcea59c9700
[ 4230.585167][ T7386] RDX: 0000000000000034 RSI: 00007fcea5836270 RDI: 0000000000000005
[ 4230.585438][ T7386] RBP: 00007fcea5836010 R08: 0000000000000000 R09: 0000000000000000
[ 4230.585691][ T7386] R10: 0000000000000000 R11: 0000000000000246 R12: 000000001983f2f0


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