======================================
| [ 1848.930600][    C1] 1 lock held by swapper/1/0:
| [ 1848.930947][ C1] #0: ffffc900001c0ae8 ((&icsk->icsk_retransmit_timer)){+.-.}-{0:0}, at: call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1737) 
| [ 1848.931643][    C1]
| [ 1848.931643][    C1] stack backtrace:
[ 1848.932088][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1848.932092][    C1] Call Trace:
[ 1848.932095][    C1]  <IRQ>
[ 1848.932100][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 1848.932110][ C1] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 1848.932122][ C1] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 1848.932135][ C1] mark_lock (kernel/locking/lockdep.c:4756) 
[ 1848.932141][ C1] mark_usage (kernel/locking/lockdep.c:4645) 
[ 1848.932147][ C1] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 1848.932157][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 1848.932163][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 1848.932172][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1848.932180][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 1848.932184][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 1848.932192][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 1848.932198][ C1] ? xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 1848.932202][ C1] xa_set_mark (lib/xarray.c:2076 lib/xarray.c:2146) 
[ 1848.932209][ C1] ? __pfx_xa_set_mark (lib/xarray.c:2144) 
[ 1848.932214][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 1848.932224][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 1848.932231][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:54 lib/ref_tracker.c:223) 
[ 1848.932238][ C1] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 1848.932244][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 1848.932250][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:213) 
[ 1848.932256][ C1] ? ref_tracker_free (lib/ref_tracker.c:281) 
[ 1848.932260][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 1848.932266][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:281) 
[ 1848.932270][ C1] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2368) 
[ 1848.932280][ C1] ? call_timer_fn (kernel/time/timer.c:1748) 
[ 1848.932285][ C1] ? __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2372) 
[ 1848.932290][ C1] ? timer_expire_remote (kernel/time/timer.c:2385 kernel/time/timer.c:2376 kernel/time/timer.c:2135) 
[ 1848.932298][ C1] __put_net (./include/linux/llist.h:238 ./include/linux/llist.h:265 net/core/net_namespace.c:732) 
[ 1848.932305][ C1] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 1848.932314][ C1] ? __pfx___put_net (net/core/net_namespace.c:729) 
[ 1848.932320][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 1848.932330][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2368) 
[ 1848.932337][ C1] ? __pfx_tcp_write_timer (net/ipv4/tcp_timer.c:727) 
[ 1848.932346][ C1] call_timer_fn (kernel/time/timer.c:1748) 
[ 1848.932350][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1737) 
[ 1848.932355][ C1] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1737) 
[ 1848.932360][ C1] ? __pfx_call_timer_fn (kernel/time/timer.c:1724) 
[ 1848.932368][ C1] ? __run_timers (kernel/time/timer.c:1798 kernel/time/timer.c:2372) 
[ 1848.932373][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1848.932379][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1848.932387][ C1] __run_timers (kernel/time/timer.c:1799 kernel/time/timer.c:2372) 
[ 1848.932393][ C1] ? __pfx_tcp_write_timer (net/ipv4/tcp_timer.c:727) 
[ 1848.932403][ C1] ? __pfx___run_timers (kernel/time/timer.c:2343) 
[ 1848.932411][ C1] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 1848.932416][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 1848.932421][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 1848.932426][ C1] ? timer_expire_remote (kernel/time/timer.c:2384 kernel/time/timer.c:2376 kernel/time/timer.c:2135) 
[ 1848.932435][ C1] timer_expire_remote (kernel/time/timer.c:2385 kernel/time/timer.c:2376 kernel/time/timer.c:2135) 
[ 1848.932441][ C1] tmigr_handle_remote_cpu (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 kernel/time/timer_migration.c:961) 
[ 1848.932449][ C1] ? __pfx_tmigr_handle_remote_cpu (kernel/time/timer_migration.c:905) 
[ 1848.932457][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 1848.932462][ C1] ? tmigr_handle_remote_up (kernel/time/timer_migration.c:1035) 
[ 1848.932467][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 1848.932473][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 1848.932481][ C1] tmigr_handle_remote_up (kernel/time/timer_migration.c:1038) 
[ 1848.932488][ C1] ? __pfx_tmigr_handle_remote_up (kernel/time/timer_migration.c:1005) 
[ 1848.932494][ C1] __walk_groups.isra.0 (kernel/time/timer_migration.c:533) 
[ 1848.932502][ C1] tmigr_handle_remote (kernel/time/timer_migration.c:1096) 
[ 1848.932508][ C1] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1059) 
[ 1848.932512][ C1] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:95 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 1848.932518][ C1] ? ktime_get (kernel/time/timekeeping.c:251 (discriminator 4) kernel/time/timekeeping.c:360 (discriminator 4) kernel/time/timekeeping.c:778 (discriminator 4)) 
[ 1848.932526][ C1] ? clockevents_program_event (kernel/time/clockevents.c:334 (discriminator 3)) 
[ 1848.932538][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 1848.932550][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 1848.932555][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 1848.932560][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 1848.932565][    C1]  </IRQ>
[ 1848.932567][    C1]  <TASK>
[ 1848.932570][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 1848.932574][ C1] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 1848.932580][ C1] Code: 54 ce 00 e9 d3 58 02 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 07 1f 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	54                   	push   %rsp
   1:	ce                   	(bad)
   2:	00 e9                	add    %ch,%cl
   4:	d3 58 02             	rcrl   %cl,0x2(%rax)
   7:	00 0f                	add    %cl,(%rdi)
   9:	1f                   	(bad)
   a:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 33 07 1f 00 	verw   0x1f0733(%rip)        # 0x1f075b
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[ 1848.932585][    C1] RSP: 0018:ffffc90000137de8 EFLAGS: 00000246
[ 1848.932590][    C1] RAX: 00000000018cf653 RBX: 1ffff92000026fc1 RCX: ffffffffa02a43e9
[ 1848.932594][    C1] RDX: 0000000000000000 RSI: ffffffffa0f2ba5f RDI: ffffffffa065cf00
[ 1848.932597][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed100d9d6702
[ 1848.932600][    C1] R10: ffff88806ceb3813 R11: ffffffffa1611288 R12: 0000000000000000
[ 1848.932604][    C1] R13: ffff888001b60040 R14: dffffc0000000000 R15: 0000000000000000
[ 1848.932611][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 1848.932621][ C1] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 1848.932626][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 1848.932631][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 1848.932639][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 1848.932646][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 1848.932655][ C1] do_idle (kernel/sched/idle.c:325) 
[ 1848.932661][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 1848.932667][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 1848.932673][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock