======================================
| [   16.071274][    C2] 1 lock held by ksoftirqd/2/27:
| [ 16.071452][ C2] #0: ffffffff92b774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   16.071772][    C2]
| [   16.071772][    C2] stack backtrace:
[   16.072000][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.072002][    C2] Call Trace:
[   16.072004][    C2]  <TASK>
[ 16.072006][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.072012][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 16.072017][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 16.072021][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.072026][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 16.072033][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 16.072036][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 16.072039][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 16.072043][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.072047][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 16.072050][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.072054][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.072058][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.072060][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.072065][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.072068][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.072071][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 16.072076][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.072079][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 16.072085][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 16.072089][ C2] ? __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:2376) 
[ 16.072094][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.072097][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 16.072100][ C2] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.072105][ C2] ? kthread (kernel/kthread.c:464) 
[ 16.072107][ C2] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.072110][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 16.072113][ C2] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 16.072117][ C2] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 16.072123][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.072126][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.072130][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.072133][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.072138][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.072141][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.072144][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 16.072147][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.072151][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.072155][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.072159][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 16.072163][ C2] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 16.072166][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.072169][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 16.072173][ C2] kthread (kernel/kthread.c:464) 
[ 16.072176][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.072178][ C2] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 16.072180][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.072184][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.072187][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.072190][ C2] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.072192][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.072195][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   16.082963][    C2] RCU nest depth: 0, expected: 0
| [   16.083140][    C2] INFO: lockdep is turned off.
| [   16.083337][    C2] Preemption disabled at:
| [ 16.083339][ C2] handle_softirqs (kernel/softirq.c:553) 
[   16.083706][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.083708][    C2] Call Trace:
[   16.083710][    C2]  <TASK>
[ 16.083712][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.083718][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 16.083725][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.083729][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.083733][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.083736][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.083741][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.083746][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.083749][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.083752][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.083757][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.083760][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 16.083765][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 16.083769][ C2] ? __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:2376) 
[ 16.083773][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.083776][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 16.083779][ C2] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.083783][ C2] ? kthread (kernel/kthread.c:464) 
[ 16.083786][ C2] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.083789][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 16.083794][ C2] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 16.083798][ C2] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 16.083803][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.083806][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.083810][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.083812][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.083817][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.083821][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.083823][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 16.083826][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.083830][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.083834][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.083838][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 16.083842][ C2] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 16.083845][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.083848][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 16.083853][ C2] kthread (kernel/kthread.c:464) 
[ 16.083855][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.083857][ C2] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 16.083860][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.083864][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.083867][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.083870][ C2] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.083873][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.083875][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   18.400921][    C3] INFO: lockdep is turned off.
| [   18.401125][    C3] Preemption disabled at:
| [ 18.401126][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   18.401557][    C3] Tainted: [W]=WARN
[   18.401558][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.401560][    C3] Call Trace:
[   18.401562][    C3]  <IRQ>
[ 18.401564][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.401571][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 18.401578][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.401582][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.401585][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 18.401590][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401595][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 18.401601][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 18.401603][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 18.401606][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.401612][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.401615][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 18.401621][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 18.401625][ C3] ? __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:2376) 
[ 18.401630][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.401634][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 18.401637][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.401640][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 18.401645][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.401648][ C3] ? __pfx___rcu_read_unlock (kernel/rcu/tree_plugin.h:431) 
[ 18.401651][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:874 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 18.401655][ C3] ? __unwind_start (./arch/x86/include/asm/unwind.h:50 arch/x86/kernel/unwind_orc.c:755) 
[ 18.401657][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 18.401663][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 18.401665][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 18.401670][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 18.401673][ C3] ? kasan_save_free_info (mm/kasan/generic.c:579) 
[ 18.401677][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.401681][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401685][ C3] __put_net (net/core/net_namespace.c:732) 
[ 18.401689][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.401694][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.401696][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.401700][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.401704][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401707][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.401714][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.401718][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 18.401723][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.401726][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.401729][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   18.401733][    C3]  </IRQ>
[   18.401734][    C3]  <TASK>
[ 18.401735][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.401738][ C3] RIP: 0010:__rcu_read_unlock (kernel/rcu/tree_plugin.h:431) 
[ 18.401742][ C3] Code: 00 00 00 4c 89 e7 e8 6f f3 68 00 e9 6f fe ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 0f 1f 44 00 00 41 54 55 65 48 8b 2d a4 f7 09 05 53 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	00 4c 89 e7          	add    %cl,-0x19(%rcx,%rcx,4)
   6:	e8 6f f3 68 00       	call   0x68f37a
   b:	e9 6f fe ff ff       	jmp    0xfffffffffffffe7f
  10:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  17:	00 00 00 
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	90                   	nop
  27:	90                   	nop
  28:	90                   	nop
  29:	90                   	nop
  2a:*	f3 0f 1e fa          	endbr64		<-- trapping instruction
  2e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  33:	41 54                	push   %r12
  35:	55                   	push   %rbp
  36:	65 48 8b 2d a4 f7 09 	mov    %gs:0x509f7a4(%rip),%rbp        # 0x509f7e2
  3d:	05 
  3e:	53                   	push   %rbx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	f3 0f 1e fa          	endbr64
   4:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   9:	41 54                	push   %r12
   b:	55                   	push   %rbp
   c:	65 48 8b 2d a4 f7 09 	mov    %gs:0x509f7a4(%rip),%rbp        # 0x509f7b8
  13:	05 
  14:	53                   	push   %rbx
  15:	48                   	rex.W
[   18.401744][    C3] RSP: 0018:ffffc900005f75b0 EFLAGS: 00000246
[   18.401748][    C3] RAX: 0000000000000001 RBX: 1ffff920000beec0 RCX: ffffc900005f8001
[   18.401750][    C3] RDX: 0000000000000000 RSI: ffffffff91e53b60 RDI: ffffffff926e7e38
[   18.401752][    C3] RBP: ffffc900005f7708 R08: 0000000000000000 R09: ffffc900005f7749
[   18.401753][    C3] R10: ffffffff8f212687 R11: ffffc900005f7748 R12: ffffc900005f7701
[   18.401755][    C3] R13: ffffc900005f7708 R14: ffffc900005f0000 R15: ffffc900005f7700
[ 18.401758][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 18.401763][ C3] unwind_next_frame (./include/linux/rcupdate.h:874 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 18.401766][ C3] ? __unwind_start (arch/x86/kernel/unwind_orc.c:712) 
[ 18.401770][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 18.401773][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401776][ C3] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 18.401780][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401783][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 18.401788][ C3] ? get_stack_info_noinstr (arch/x86/kernel/dumpstack_64.c:173) 
[ 18.401793][ C3] __unwind_start (./arch/x86/include/asm/unwind.h:50 arch/x86/kernel/unwind_orc.c:755) 
[ 18.401796][ C3] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 18.401799][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 18.401802][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 18.401808][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 18.401812][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 18.401815][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 18.401817][ C3] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 18.401822][ C3] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 18.401825][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 18.401828][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 18.401830][ C3] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 18.401834][ C3] ? free_pgtables (./include/linux/hugetlb_inline.h:11 mm/memory.c:372) 
[ 18.401838][ C3] ? exit_mmap (mm/mmap.c:1297) 
[ 18.401842][ C3] ? mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 18.401845][ C3] ? exit_mm (kernel/exit.c:596) 
[ 18.401849][ C3] ? do_exit (kernel/exit.c:950) 
[ 18.401852][ C3] ? do_group_exit (kernel/exit.c:1089) 
[ 18.401855][ C3] ? __x64_sys_exit_group (kernel/exit.c:1117) 
[ 18.401858][ C3] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.401864][ C3] ? 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) 
[ 18.401868][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 18.401871][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401875][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401878][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.401882][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.401887][ C3] ? __debug_check_no_obj_freed (lib/debugobjects.c:1110) 
[ 18.401892][ C3] ? __pfx___debug_check_no_obj_freed (lib/debugobjects.c:1070) 
[ 18.401896][ C3] ? trace_rcu_segcb_stats (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745 ./include/trace/events/rcu.h:537) 
[ 18.401901][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401904][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.401908][ C3] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 18.401911][ C3] kasan_save_free_info (mm/kasan/generic.c:579) 
[ 18.401913][ C3] __kasan_slab_free (mm/kasan/common.c:271) 
[ 18.401917][ C3] kmem_cache_free (mm/slub.c:4642 mm/slub.c:4744) 
[ 18.401922][ C3] ? __rb_erase_color (lib/rbtree.c:362 lib/rbtree.c:413) 
[ 18.401925][ C3] ? __pfx___anon_vma_interval_tree_augment_rotate (mm/interval_tree.c:71) 
[ 18.401928][ C3] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 18.401932][ C3] unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 18.401935][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401939][ C3] free_pgtables (./include/linux/hugetlb_inline.h:11 mm/memory.c:372) 
[ 18.401944][ C3] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 18.401947][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 18.401950][ C3] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 18.401954][ C3] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 18.401957][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.401960][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.401963][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 18.401967][ C3] exit_mmap (mm/mmap.c:1297) 
[ 18.401972][ C3] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 18.401976][ C3] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 18.401980][ C3] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 18.401983][ C3] ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:924) 
[ 18.401991][ C3] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 18.401994][ C3] exit_mm (kernel/exit.c:596) 
[ 18.401998][ C3] do_exit (kernel/exit.c:950) 
[ 18.402002][ C3] do_group_exit (kernel/exit.c:1089) 
[ 18.402006][ C3] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 18.402010][ C3] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.402013][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.402016][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.402019][    C3] RIP: 0033:0x7f11561cfabd
[ 18.402022][ C3] Code: Unable to access opcode bytes at 0x7f11561cfa93.

Code starting with the faulting instruction
===========================================
[   18.402023][    C3] RSP: 002b:00007ffcb22acd48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   18.402026][    C3] RAX: ffffffffffffffda RBX: 00007f11562ac9c0 RCX: 00007f11561cfabd
[   18.402028][    C3] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   18.402030][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   18.402031][    C3] R10: 00007ffcb22acbd0 R11: 0000000000000246 R12: 00007f11562ac9c0


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal