======================================
| [4461.057793][T24902] #0: ffff8880010a9548 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3210 (discriminator 4)) 
| [4461.058102][T24902] #1: ffffc9000871fd40 ((work_completion)(&trans->work)){+.+.}-{0:0}, at: process_one_work (kernel/workqueue.c:3212) 
| [ 4461.058444][T24902]
| [ 4461.058444][T24902] stack backtrace:
[ 4461.058682][T24902] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 4461.058684][T24902] Workqueue: events xfrm_trans_reinject
[ 4461.058692][T24902] Call Trace:
[ 4461.058693][T24902]  <TASK>
[4461.058696][T24902] dump_stack_lvl (lib/dump_stack.c:123) 
[4461.058705][T24902] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848) 
[4461.058715][T24902] ip6_input (./include/net/net_namespace.h:404 ./include/linux/netdevice.h:2669 net/ipv6/ip6_input.c:490) 
[4461.058720][T24902] ? __pfx_ip6_input (net/ipv6/ip6_input.c:489) 
[4461.058722][T24902] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:230) 
[4461.058725][T24902] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[4461.058733][T24902] ? mark_held_locks (kernel/locking/lockdep.c:4323) 
[4461.058743][T24902] ? __pfx_ip6_rcv_finish (net/ipv6/ip6_input.c:70) 
[4461.058748][T24902] xfrm_trans_reinject (net/xfrm/xfrm_input.c:787) 
[4461.058752][T24902] ? lock_acquire.part.0 (kernel/locking/lockdep.c:469 kernel/locking/lockdep.c:5853) 
[4461.058759][T24902] ? __pfx_xfrm_trans_reinject (net/xfrm/xfrm_input.c:775) 
[4461.058766][T24902] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[4461.058771][T24902] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[4461.058774][T24902] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[4461.058781][T24902] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[4461.058784][T24902] ? process_one_work (kernel/workqueue.c:3212) 
[4461.058793][T24902] process_one_work (kernel/workqueue.c:3236) 
[4461.058806][T24902] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[4461.058812][T24902] ? __pfx_process_one_work (kernel/workqueue.c:3138) 
[4461.058825][T24902] ? assign_work (kernel/workqueue.c:1200) 
[4461.058835][T24902] worker_thread (kernel/workqueue.c:3311 kernel/workqueue.c:3398) 
[4461.058840][T24902] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4349 kernel/locking/lockdep.c:4408) 
[4461.058852][T24902] ? __pfx_worker_thread (kernel/workqueue.c:3344) 
[4461.058858][T24902] kthread (kernel/kthread.c:464) 
[4461.058863][T24902] ? __pfx_kthread (kernel/kthread.c:413) 
[4461.058872][T24902] ? __pfx_kthread (kernel/kthread.c:413) 
[4461.058878][T24902] ret_from_fork (arch/x86/kernel/process.c:148) 
[4461.058883][T24902] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
lockdep_rcu_suspicious:ip6_input:xfrm_trans_reinject:process_one_work:worker_thread