======================================
| [   47.760134][    C2]  #2: ff11000009516f78 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap (./include/linux/mmap_lock.h:536 mm/mmap.c:1308)
| [   47.760310][    C2]  #3: ffffffffbbf77c00 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:300 (discriminator 2) kernel/rcu/tree.c:2611 (discriminator 2))
| [   47.760474][    C2]
| [   47.760474][    C2] stack backtrace:
[   47.760599][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   47.760601][    C2] Call Trace:
[   47.760602][    C2]  <IRQ>
[   47.760604][    C2]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   47.760609][    C2]  print_usage_bug.part.0.cold (kernel/locking/lockdep.c:4042)
[   47.760612][    C2]  ? filter_irq_stacks (kernel/stacktrace.c:402)
[   47.760615][    C2]  mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4056 kernel/locking/lockdep.c:4267)
[   47.760617][    C2]  ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   47.760620][    C2]  ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   47.760622][    C2]  ? save_trace (kernel/locking/lockdep.c:589)
[   47.760623][    C2]  ? do_jit (arch/x86/net/bpf_jit_comp.c:2160)
[   47.760627][    C2]  mark_lock (kernel/locking/lockdep.c:4753)
[   47.760629][    C2]  mark_usage (kernel/locking/lockdep.c:4642)
[   47.760630][    C2]  __lock_acquire (kernel/locking/lockdep.c:5191)
[   47.760632][    C2]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   47.760633][    C2]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   47.760636][    C2]  lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   47.760637][    C2]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   47.760639][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   47.760641][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   47.760643][    C2]  _raw_spin_lock (./include/linux/spinlock_api_smp.h:158 (discriminator 1) kernel/locking/spinlock.c:158 (discriminator 1))
[   47.760645][    C2]  ? tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   47.760646][    C2] tcf_mirred_release (./include/linux/spinlock.h:342 net/sched/act_mirred.c:78) act_mirred
[   47.760648][    C2]  tcf_action_rcu_free (net/sched/act_api.c:367 net/sched/act_api.c:378)
[   47.760650][    C2]  ? rcu_do_batch (./include/linux/rcupdate.h:310 (discriminator 2) kernel/rcu/tree.c:2619 (discriminator 2))
[   47.760651][    C2]  rcu_do_batch (kernel/rcu/tree.c:2617)
[   47.760654][    C2]  ? rcu_start_this_gp (kernel/rcu/tree.c:1040 (discriminator 1))
[   47.760656][    C2]  ? trace_rcu_batch_end (./include/trace/events/rcu.h:714 (discriminator 19))
[   47.760658][    C2]  ? mark_held_locks (kernel/locking/lockdep.c:4325)
[   47.760660][    C2]  ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:470 (discriminator 2) kernel/locking/lockdep.c:4411 (discriminator 2))
[   47.760661][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   47.760663][    C2]  rcu_core (kernel/rcu/tree.c:2869)
[   47.760665][    C2]  handle_softirqs (kernel/softirq.c:622)
[   47.760666][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   47.760669][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   47.760671][    C2]  ? _local_bh_enable (kernel/softirq.c:405 (discriminator 1))
[   47.760673][    C2]  __irq_exit_rcu (kernel/softirq.c:656 kernel/softirq.c:496 kernel/softirq.c:735)
[   47.760674][    C2]  irq_exit_rcu (kernel/softirq.c:752)
[   47.760676][    C2]  sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1061 (discriminator 37) arch/x86/kernel/apic/apic.c:1061 (discriminator 37))
[   47.760678][    C2]  </IRQ>
[   47.760678][    C2]  <TASK>
[   47.760679][    C2]  asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:697)
[   47.760681][    C2] RIP: 0010:stack_depot_save_flags (./include/linux/bitops.h:126 (discriminator 4) ./include/linux/jhash.h:129 (discriminator 4) lib/stackdepot.c:571 (discriminator 4) lib/stackdepot.c:672 (discriminator 4))
[   47.760685][    C2] Code: 03 41 f8 29 c7 c1 c2 04 44 01 c0 31 fa 44 89 c7 41 89 d0 29 d7 01 c2 41 c1 c0 06 41 31 f8 44 89 c7 44 29 c0 41 01 d0 c1 c7 08 <31> f8 89 c7 29 c2 44 01 c0 c1 c7 10 31 fa 89 d7 41 29 d0 01 c2 c1
All code
========
   0:	03 41 f8             	add    -0x8(%rcx),%eax
   3:	29 c7                	sub    %eax,%edi
   5:	c1 c2 04             	rol    $0x4,%edx
   8:	44 01 c0             	add    %r8d,%eax
   b:	31 fa                	xor    %edi,%edx
   d:	44 89 c7             	mov    %r8d,%edi
  10:	41 89 d0             	mov    %edx,%r8d
  13:	29 d7                	sub    %edx,%edi
  15:	01 c2                	add    %eax,%edx
  17:	41 c1 c0 06          	rol    $0x6,%r8d
  1b:	41 31 f8             	xor    %edi,%r8d
  1e:	44 89 c7             	mov    %r8d,%edi
  21:	44 29 c0             	sub    %r8d,%eax
  24:	41 01 d0             	add    %edx,%r8d
  27:	c1 c7 08             	rol    $0x8,%edi
  2a:*	31 f8                	xor    %edi,%eax		<-- trapping instruction
  2c:	89 c7                	mov    %eax,%edi
  2e:	29 c2                	sub    %eax,%edx
  30:	44 01 c0             	add    %r8d,%eax
  33:	c1 c7 10             	rol    $0x10,%edi
  36:	31 fa                	xor    %edi,%edx
  38:	89 d7                	mov    %edx,%edi
  3a:	41 29 d0             	sub    %edx,%r8d
  3d:	01 c2                	add    %eax,%edx
  3f:	c1                   	.byte 0xc1

Code starting with the faulting instruction
===========================================
   0:	31 f8                	xor    %edi,%eax
   2:	89 c7                	mov    %eax,%edi
   4:	29 c2                	sub    %eax,%edx
   6:	44 01 c0             	add    %r8d,%eax
   9:	c1 c7 10             	rol    $0x10,%edi
   c:	31 fa                	xor    %edi,%edx
   e:	89 d7                	mov    %edx,%edi
  10:	41 29 d0             	sub    %edx,%r8d
  13:	01 c2                	add    %eax,%edx
  15:	c1                   	.byte 0xc1
[   47.760687][    C2] RSP: 0018:ffa00000007ef430 EFLAGS: 00000203
[   47.760689][    C2] RAX: 0000000091408e00 RBX: 0000000000000000 RCX: ffa00000007ef4d8
[   47.760691][    C2] RDX: 00000000141fcab8 RSI: 0000000000000010 RDI: 00000000866cc263
[   47.760692][    C2] RBP: 0000000000000011 R08: 0000000077a6377a R09: 0000000000000000
[   47.760693][    C2] R10: 0000000000000002 R11: 0000000000000001 R12: ffa00000007ef490
[   47.760694][    C2] R13: 0000000000000011 R14: 0000000000000000 R15: ffffffffb944fdf2
[   47.760694][    C2]  ? unlink_anon_vmas (mm/rmap.c:147 mm/rmap.c:539)
[   47.760698][    C2]  ? validate_chain (kernel/locking/lockdep.c:3801 (discriminator 2) kernel/locking/lockdep.c:3821 (discriminator 2) kernel/locking/lockdep.c:3876 (discriminator 2))
[   47.760700][    C2]  ? unlink_anon_vmas (mm/rmap.c:147 mm/rmap.c:539)
[   47.760701][    C2]  kasan_save_stack (mm/kasan/common.c:58)
[   47.760704][    C2]  ? kasan_save_stack (mm/kasan/common.c:57)
[   47.760706][    C2]  ? kasan_record_aux_stack (mm/kasan/generic.c:556)
[   47.760708][    C2]  ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3131)
[   47.760709][    C2]  ? kmem_cache_free (./include/linux/kmemleak.h:50 mm/slub.c:2614 mm/slub.c:6251 mm/slub.c:6378)
[   47.760712][    C2]  ? unlink_anon_vmas (mm/rmap.c:147 mm/rmap.c:539)
[   47.760713][    C2]  ? free_pgtables (mm/memory.c:414)
[   47.760716][    C2]  ? exit_mmap (mm/mmap.c:1312)
[   47.760717][    C2]  ? mmput (kernel/fork.c:1178 kernel/fork.c:1201)
[   47.760719][    C2]  ? exec_mmap (fs/exec.c:893)
[   47.760720][    C2]  ? begin_new_exec (fs/exec.c:1148)
[   47.760721][    C2]  ? load_elf_binary (fs/binfmt_elf.c:1010)
[   47.760724][    C2]  ? exec_binprm (fs/exec.c:1664 fs/exec.c:1696)
[   47.760725][    C2]  ? bprm_execve (fs/exec.c:1748 fs/exec.c:1724)
[   47.760726][    C2]  ? do_execveat_common.isra.0 (fs/exec.c:1846)
[   47.760727][    C2]  ? __x64_sys_execve (fs/exec.c:1930 (discriminator 2) fs/exec.c:1924 (discriminator 2) fs/exec.c:1924 (discriminator 2))
[   47.760728][    C2]  ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   47.760729][    C2]  ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.760734][    C2]  kasan_record_aux_stack (mm/kasan/generic.c:556)
[   47.760735][    C2]  ? __remove_object (mm/kmemleak.c:609)
[   47.760737][    C2]  __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3131)
[   47.760739][    C2]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4472)
[   47.760740][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:178 (discriminator 6) kernel/locking/spinlock.c:198 (discriminator 6))
[   47.760742][    C2]  ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:179 (discriminator 1) kernel/locking/spinlock.c:198 (discriminator 1))
[   47.760743][    C2]  kmem_cache_free (./include/linux/kmemleak.h:50 mm/slub.c:2614 mm/slub.c:6251 mm/slub.c:6378)
[   47.760746][    C2]  unlink_anon_vmas (mm/rmap.c:147 mm/rmap.c:539)
[   47.760748][    C2]  free_pgtables (mm/memory.c:414)
[   47.760751][    C2]  ? free_pgd_range (mm/memory.c:351)
[   47.760752][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   47.760754][    C2]  ? rwsem_down_write_slowpath (./include/linux/list.h:159)
[   47.760756][    C2]  exit_mmap (mm/mmap.c:1312)
[   47.760759][    C2]  ? vm_brk_flags (./include/linux/seqlock.h:453)
[   47.760760][    C2]  ? lock_acquire (./include/trace/events/lock.h:24 (discriminator 22) kernel/locking/lockdep.c:5831 (discriminator 22))
[   47.760761][    C2]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:752 (discriminator 3))
[   47.760764][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   47.760767][    C2]  ? __mutex_unlock_slowpath (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:4480 kernel/locking/mutex.c:1007)
[   47.760770][    C2]  mmput (kernel/fork.c:1178 kernel/fork.c:1201)
[   47.760772][    C2]  exec_mmap (fs/exec.c:893)
[   47.760773][    C2]  begin_new_exec (fs/exec.c:1148)
[   47.760775][    C2]  load_elf_binary (fs/binfmt_elf.c:1010)
[   47.760777][    C2]  ? __lock_acquire (kernel/locking/lockdep.c:5237)
[   47.760779][    C2]  ? lock_acquire.part.0 (kernel/locking/lockdep.c:5868 (discriminator 1))
[   47.760780][    C2]  ? find_held_lock (kernel/locking/lockdep.c:5350)
[   47.760782][    C2]  ? load_elf_interp.isra.0 (fs/binfmt_elf.c:693 (discriminator 4))
[   47.760784][    C2]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5535)
[   47.760785][    C2]  ? exec_binprm (fs/exec.c:1662 fs/exec.c:1696)
[   47.760787][    C2]  exec_binprm (fs/exec.c:1664 fs/exec.c:1696)
[   47.760789][    C2]  ? check_unsafe_exec (fs/exec.c:1522)
[   47.760791][    C2]  bprm_execve (fs/exec.c:1748 fs/exec.c:1724)
[   47.760792][    C2]  do_execveat_common.isra.0 (fs/exec.c:1846)
[   47.760794][    C2]  __x64_sys_execve (fs/exec.c:1930 (discriminator 2) fs/exec.c:1924 (discriminator 2) fs/exec.c:1924 (discriminator 2))
[   47.760796][    C2]  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)
[   47.760797][    C2]  ? trace_hardirqs_off (kernel/trace/trace_preemptirq.c:104 (discriminator 1))
[   47.760800][    C2]  ? exc_page_fault (arch/x86/mm/fault.c:1480 (discriminator 3) arch/x86/mm/fault.c:1527 (discriminator 3))
[   47.760802][    C2]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   47.760803][    C2] RIP: 0033:0x7f69c7f0815b
[   47.760808][    C2] Code: Unable to access opcode bytes at 0x7f69c7f08131.

Code starting with the faulting instruction
===========================================
[   47.760809][    C2] RSP: 002b:00007fff071eebb8 EFLAGS: 00000206 ORIG_RAX: 000000000000003b
[   47.760811][    C2] RAX: ffffffffffffffda RBX: 000055ad933acf30 RCX: 00007f69c7f0815b
[   47.760812][    C2] RDX: 000055ad932fc4c0 RSI: 000055ad93374370 RDI: 000055ad933acf30
[   47.760812][    C2] RBP: 00007fff071eeca0 R08: 000055ad93288830 R09: 0000000000000050
[   47.760813][    C2] R10: 0000000000000051 R11: 0000000000000206 R12: 000055ad933acf30


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