======================================
| [ 2028.686247][    C1]  #1: ffffffff9078bda0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame (./include/linux/rcupdate.h:300 (discriminator 2) ./include/linux/rcupdate.h:838 (discriminator 2) ./include/linux/rcupdate.h:1181 (discriminator 2) arch/x86/kernel/unwind_orc.c:495 (discriminator 2))
| [ 2028.686408][    C1]  #2: ffffffff9078bc80 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [ 2028.686566][    C1]
| [ 2028.686566][    C1] stack backtrace:
[ 2028.686681][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 2028.686683][    C1] Call Trace:
[ 2028.686684][    C1]  <IRQ>
[ 2028.686685][    C1]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[ 2028.686690][    C1]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[ 2028.686693][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[ 2028.686696][    C1]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[ 2028.686698][    C1]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[ 2028.686699][    C1]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[ 2028.686701][    C1]  ? save_trace (kernel/locking/lockdep.c:589)
[ 2028.686703][    C1]  ? arch_bpf_trampoline_size (arch/x86/net/bpf_jit_comp.c:3585)
[ 2028.686705][    C1]  mark_lock (kernel/locking/lockdep.c:4753)
[ 2028.686707][    C1]  mark_usage (kernel/locking/lockdep.c:4642)
[ 2028.686708][    C1]  __lock_acquire (kernel/locking/lockdep.c:5191)
[ 2028.686709][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[ 2028.686711][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[ 2028.686713][    C1]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[ 2028.686715][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 2028.686716][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2028.686718][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[ 2028.686720][    C1]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[ 2028.686721][    C1]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 2028.686723][    C1] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[ 2028.686725][    C1]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[ 2028.686726][    C1]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[ 2028.686728][    C1]  rcu_do_batch (kernel/rcu/tree.c:2617)
[ 2028.686730][    C1]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[ 2028.686732][    C1]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[ 2028.686734][    C1]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[ 2028.686735][    C1]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[ 2028.686737][    C1]  rcu_core (kernel/rcu/tree.c:2869)
[ 2028.686739][    C1]  handle_softirqs (kernel/softirq.c:622)
[ 2028.686740][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 2028.686742][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[ 2028.686744][    C1]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[ 2028.686746][    C1]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[ 2028.686747][    C1]  irq_exit_rcu (kernel/softirq.c:752)
[ 2028.686748][    C1]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[ 2028.686750][    C1]  </IRQ>
[ 2028.686750][    C1]  <TASK>
[ 2028.686751][    C1]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[ 2028.686753][    C1] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:530)
[ 2028.686755][    C1] Code: 01 40 38 f1 7f 08 84 c9 0f 85 b0 15 00 00 41 88 45 41 41 0f b6 40 04 83 e0 0f 3c 05 0f 84 9e 0e 00 00 0f 87 25 04 00 00 3c 03 <0f> 84 f6 0d 00 00 3c 04 0f 84 62 0d 00 00 3c 01 0f 84 31 06 00 00
All code
========
   0:	01 40 38             	add    %eax,0x38(%rax)
   3:	f1                   	int1
   4:	7f 08                	jg     0xe
   6:	84 c9                	test   %cl,%cl
   8:	0f 85 b0 15 00 00    	jne    0x15be
   e:	41 88 45 41          	mov    %al,0x41(%r13)
  12:	41 0f b6 40 04       	movzbl 0x4(%r8),%eax
  17:	83 e0 0f             	and    $0xf,%eax
  1a:	3c 05                	cmp    $0x5,%al
  1c:	0f 84 9e 0e 00 00    	je     0xec0
  22:	0f 87 25 04 00 00    	ja     0x44d
  28:	3c 03                	cmp    $0x3,%al
  2a:*	0f 84 f6 0d 00 00    	je     0xe26		<-- trapping instruction
  30:	3c 04                	cmp    $0x4,%al
  32:	0f 84 62 0d 00 00    	je     0xd9a
  38:	3c 01                	cmp    $0x1,%al
  3a:	0f 84 31 06 00 00    	je     0x671

Code starting with the faulting instruction
===========================================
   0:	0f 84 f6 0d 00 00    	je     0xdfc
   6:	3c 04                	cmp    $0x4,%al
   8:	0f 84 62 0d 00 00    	je     0xd70
   e:	3c 01                	cmp    $0x1,%al
  10:	0f 84 31 06 00 00    	je     0x647
[ 2028.686757][    C1] RSP: 0018:ffa0000007d77698 EFLAGS: 00000202
[ 2028.686759][    C1] RAX: 0000000000000004 RBX: 1ff4000000faeedc RCX: 0000000000000000
[ 2028.686760][    C1] RDX: ffa0000007d777d9 RSI: 0000000000000001 RDI: 0000000000000001
[ 2028.686761][    C1] RBP: 0000000000000001 R08: ffffffff9160b594 R09: ffffffff9131144c
[ 2028.686762][    C1] R10: ffffffff9160b598 R11: 0000000000000000 R12: ffa0000007d777f0
[ 2028.686762][    C1] R13: ffa0000007d77798 R14: ff11000013aba340 R15: ff1100000cf531c0
[ 2028.686765][    C1]  ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:217 arch/x86/kernel/unwind_orc.c:510)
[ 2028.686766][    C1]  ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[ 2028.686768][    C1]  ? stack_access_ok (./arch/x86/include/asm/stacktrace.h:55)
[ 2028.686770][    C1]  ? __unwind_start (arch/x86/kernel/unwind_orc.c:787)
[ 2028.686771][    C1]  ? write_profile (profile.c:?)
[ 2028.686773][    C1]  arch_stack_walk (arch/x86/kernel/stacktrace.c:25)
[ 2028.686777][    C1]  ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[ 2028.686779][    C1]  stack_trace_save (kernel/stacktrace.c:122 (discriminator 1))
[ 2028.686781][    C1]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[ 2028.686783][    C1]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4040 (discriminator 3) kernel/rcu/tree.c:4032 (discriminator 3))
[ 2028.686785][    C1]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[ 2028.686787][    C1]  ? tear_down_vmas (mm/mmap.c:1262)
[ 2028.686788][    C1]  kasan_save_stack (mm/kasan/common.c:57)
[ 2028.686791][    C1]  ? kasan_save_stack (mm/kasan/common.c:57)
[ 2028.686792][    C1]  ? kasan_record_aux_stack (mm/kasan/generic.c:556)
[ 2028.686793][    C1]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3131)
[ 2028.686794][    C1]  ? tear_down_vmas (mm/mmap.c:1262)
[ 2028.686795][    C1]  ? exit_mmap (mm/mmap.c:1320)
[ 2028.686796][    C1]  ? mmput (kernel/fork.c:1178 kernel/fork.c:1201)
[ 2028.686798][    C1]  ? exit_mm (kernel/exit.c:582)
[ 2028.686800][    C1]  ? do_exit (kernel/exit.c:964)
[ 2028.686801][    C1]  ? do_group_exit (kernel/exit.c:1119)
[ 2028.686802][    C1]  ? __x64_sys_exit_group (kernel/exit.c:1130 kernel/exit.c:1128 kernel/exit.c:1128)
[ 2028.686803][    C1]  ? x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[ 2028.686805][    C1]  ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[ 2028.686810][    C1]  kasan_record_aux_stack (mm/kasan/generic.c:556)
[ 2028.686812][    C1]  ? flush_cpu_sheaves (mm/slub.c:3958)
[ 2028.686814][    C1]  __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3131)
[ 2028.686816][    C1]  tear_down_vmas (mm/mmap.c:1262)
[ 2028.686818][    C1]  exit_mmap (mm/mmap.c:1320)
[ 2028.686819][    C1]  ? vm_brk_flags (./include/linux/seqlock.h:453)
[ 2028.686820][    C1]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[ 2028.686822][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2028.686824][    C1]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[ 2028.686826][    C1]  ? __mutex_unlock_slowpath (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:4480 kernel/locking/mutex.c:1007)
[ 2028.686830][    C1]  mmput (kernel/fork.c:1178 kernel/fork.c:1201)
[ 2028.686832][    C1]  exit_mm (kernel/exit.c:582)
[ 2028.686833][    C1]  ? unwind_deferred_task_exit (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:3188 kernel/unwind/deferred.c:56 kernel/unwind/deferred.c:196)
[ 2028.686835][    C1]  do_exit (kernel/exit.c:964)
[ 2028.686837][    C1]  ? exit_notify (kernel/exit.c:748)
[ 2028.686838][    C1]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[ 2028.686839][    C1]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[ 2028.686841][    C1]  do_group_exit (kernel/exit.c:1119)
[ 2028.686842][    C1]  __x64_sys_exit_group (kernel/exit.c:1130 kernel/exit.c:1128 kernel/exit.c:1128)
[ 2028.686844][    C1]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[ 2028.686845][    C1]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[ 2028.686847][    C1]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[ 2028.686850][    C1]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[ 2028.686851][    C1]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[ 2028.686853][    C1] RIP: 0033:0x7eff74fdb2b8
[ 2028.686855][    C1] Code: Unable to access opcode bytes at 0x7eff74fdb28e.

Code starting with the faulting instruction
===========================================
[ 2028.686856][    C1] RSP: 002b:00007fff7dc0c988 EFLAGS: 00000256 ORIG_RAX: 00000000000000e7
[ 2028.686857][    C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007eff74fdb2b8
[ 2028.686858][    C1] RDX: 0000000000000000 RSI: fffffffffffffe98 RDI: 0000000000000000
[ 2028.686859][    C1] RBP: 00007fff7dc0cb10 R08: 000055eaf2aa6f08 R09: 0000000000000000
[ 2028.686859][    C1] R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000


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