======================================
| [   13.168135][  T295] softirqs last disabled at (26693): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   13.168137][  T295] Preemption disabled at:
| [   13.168138][  T295] vprintk_emit (kernel/printk/printk.c:2471)
| [   13.168147][  T295] Tainted: [W]=WARN
[   13.168148][  T295] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   13.168150][  T295] Call Trace:
[   13.168151][  T295]  <TASK>
[   13.168153][  T295]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   13.168159][  T295]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   13.168161][  T295]  __might_resched.cold (kernel/sched/core.c:9234)
[   13.168166][  T295]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   13.168170][  T295]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   13.168175][  T295]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   13.168177][  T295]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.168183][  T295]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   13.168186][  T295]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   13.168189][  T295]  put_chars (drivers/char/virtio_console.c:1176)
[   13.168191][  T295]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   13.168193][  T295]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   13.168198][  T295]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   13.168200][  T295]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   13.168204][  T295]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   13.168207][  T295]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.168212][  T295]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   13.168215][  T295]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.168219][  T295]  console_emit_next_record (kernel/printk/printk.c:3183)
[   13.168223][  T295]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   13.168225][  T295]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   13.168228][  T295]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.168230][  T295]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   13.168234][  T295]  console_flush_one_record (kernel/printk/printk.c:3268)
[   13.168238][  T295]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   13.168239][  T295]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   13.168244][  T295]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   13.168247][  T295]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   13.168249][  T295]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.168251][  T295]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   13.168254][  T295]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   13.168256][  T295]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   13.168259][  T295]  vprintk_emit (kernel/printk/printk.c:2479)
[   13.168263][  T295]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   13.168268][  T295]  ? vlan_netlink_fini (./include/linux/etherdevice.h:306 net/8021q/vlan.c:316 net/8021q/vlan.c:416) 8021q
[   13.168272][  T295]  _printk (kernel/printk/printk.c:2504)
[   13.168277][  T295]  ? snapshot_read.cold (user.c:?)
[   13.168283][  T295]  ? do_one_initcall (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/linux/cpumask.h:650 ./include/linux/cpumask.h:1232 ./include/trace/events/initcall.h:27 init/main.c:1356)
[   13.168286][  T295] vlan_proto_init (./include/linux/rcupdate.h:309 (discriminator 2) ./include/linux/rcupdate.h:849 (discriminator 2) ./include/net/netns/generic.h:45 (discriminator 2)) 8021q
[   13.168289][  T295]  do_one_initcall (init/main.c:1357)
[   13.168292][  T295]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[   13.168296][  T295]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[   13.168299][  T295]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[   13.168303][  T295]  do_init_module (kernel/module/main.c:3117)
[   13.168307][  T295]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[   13.168311][  T295]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[   13.168314][  T295]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[   13.168318][  T295]  load_module (kernel/module/main.c:3593)
[   13.168325][  T295]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[   13.168328][  T295]  ? __ia32_sys_fsconfig (??:?)
[   13.168331][  T295]  ? ovl_real_file (fs/overlayfs/file.c:195)
[   13.168335][  T295]  ? backing_file_read_iter (fs/backing-file.c:211)
[   13.168338][  T295]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   13.168342][  T295]  init_module_from_file (kernel/module/main.c:3790)
[   13.168345][  T295]  ? __do_sys_init_module (kernel/module/main.c:3664)
[   13.168353][  T295]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   13.168356][  T295]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   13.168359][  T295]  idempotent_init_module (kernel/module/main.c:3802)
[   13.168362][  T295]  ? init_module_from_file (kernel/module/main.c:3791)
[   13.168368][  T295]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   13.168370][  T295]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[   13.168376][  T295]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[   13.168378][  T295]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   13.168381][  T295]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   13.168383][  T295]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   13.168386][  T295]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   13.168388][  T295] RIP: 0033:0x7fe14c14f37d
[   13.168392][  T295] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 4b aa 0f 00 f7 d8 64 89 01 48
All code
========
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00 
   c:	90                   	nop
   d:	f3 0f 1e fa          	endbr64
  11:	48 89 f8             	mov    %rdi,%rax
  14:	48 89 f7             	mov    %rsi,%rdi
  17:	48 89 d6             	mov    %rdx,%rsi
  1a:	48 89 ca             	mov    %rcx,%rdx
  1d:	4d 89 c2             	mov    %r8,%r10
  20:	4d 89 c8             	mov    %r9,%r8
  23:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa85
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa5b
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[   13.168394][  T295] RSP: 002b:00007ffde892f8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   13.168396][  T295] RAX: ffffffffffffffda RBX: 0000555fc3824810 RCX: 00007fe14c14f37d
[   13.168398][  T295] RDX: 0000000000000000 RSI: 0000555fa9f69ffd RDI: 0000000000000000
[   13.168399][  T295] RBP: 00007ffde892f980 R08: 0000000000000000 R09: 0000000000000000
[   13.168399][  T295] R10: 0000000000000000 R11: 0000000000000246 R12: 0000555fa9f69ffd
[   13.168400][  T295] R13: 0000555fc3824960 R14: 0000000000040000 R15: 0000000000000000
| [   20.347909][  T394] softirqs last disabled at (21911): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   20.347912][  T394] Preemption disabled at:
| [   20.347913][  T394] vprintk_emit (kernel/printk/printk.c:2471)
| [   20.347925][  T394] Tainted: [W]=WARN
[   20.347926][  T394] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.347928][  T394] Call Trace:
[   20.347930][  T394]  <TASK>
[   20.347932][  T394]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   20.347939][  T394]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   20.347942][  T394]  __might_resched.cold (kernel/sched/core.c:9234)
[   20.347948][  T394]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   20.347954][  T394]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   20.347961][  T394]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   20.347965][  T394]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   20.347973][  T394]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   20.347977][  T394]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   20.347982][  T394]  put_chars (drivers/char/virtio_console.c:1176)
[   20.347985][  T394]  ? desc_read_finalized_seq (kernel/printk/printk_ringbuffer.c:1934)
[   20.347988][  T394]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   20.347993][  T394]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   20.347998][  T394]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   20.348005][  T394]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   20.348008][  T394]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   20.348011][  T394]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   20.348018][  T394]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   20.348020][  T394]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   20.348025][  T394]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.348029][  T394]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   20.348035][  T394]  console_emit_next_record (kernel/printk/printk.c:3183)
[   20.348042][  T394]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   20.348044][  T394]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   20.348049][  T394]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.348053][  T394]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   20.348059][  T394]  console_flush_one_record (kernel/printk/printk.c:3268)
[   20.348066][  T394]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   20.348069][  T394]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   20.348078][  T394]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   20.348082][  T394]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   20.348085][  T394]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.348088][  T394]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   20.348094][  T394]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   20.348097][  T394]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   20.348102][  T394]  vprintk_emit (kernel/printk/printk.c:2479)
[   20.348109][  T394]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   20.348118][  T394]  ? gre_exit (net/ipv4/gre_demux.c:73) gre
[   20.348123][  T394]  _printk (kernel/printk/printk.c:2504)
[   20.348129][  T394]  ? snapshot_read.cold (user.c:?)
[   20.348139][  T394]  ? do_one_initcall (./include/linux/instrumented.h:82 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/linux/cpumask.h:650 ./include/linux/cpumask.h:1232 ./include/trace/events/initcall.h:27 init/main.c:1356)
[   20.348144][  T394] gact_init_module (net/sched/act_gact.c:180) act_gact
[   20.348148][  T394]  do_one_initcall (init/main.c:1357)
[   20.348152][  T394]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[   20.348160][  T394]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[   20.348164][  T394]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[   20.348171][  T394]  do_init_module (kernel/module/main.c:3117)
[   20.348178][  T394]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[   20.348183][  T394]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[   20.348188][  T394]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[   20.348195][  T394]  load_module (kernel/module/main.c:3593)
[   20.348208][  T394]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[   20.348214][  T394]  ? __ia32_sys_fsconfig (??:?)
[   20.348218][  T394]  ? ovl_real_file (fs/overlayfs/file.c:195)
[   20.348223][  T394]  ? backing_file_read_iter (fs/backing-file.c:211)
[   20.348227][  T394]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   20.348234][  T394]  init_module_from_file (kernel/module/main.c:3790)
[   20.348239][  T394]  ? __do_sys_init_module (kernel/module/main.c:3664)
[   20.348253][  T394]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   20.348259][  T394]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   20.348264][  T394]  idempotent_init_module (kernel/module/main.c:3802)
[   20.348269][  T394]  ? init_module_from_file (kernel/module/main.c:3791)
[   20.348283][  T394]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   20.348286][  T394]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[   20.348296][  T394]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[   20.348298][  T394]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   20.348304][  T394]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   20.348307][  T394]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   20.348311][  T394]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   20.348314][  T394] RIP: 0033:0x7f426ea6237d
[   20.348319][  T394] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 4b aa 0f 00 f7 d8 64 89 01 48
All code
========
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00 
   c:	90                   	nop
   d:	f3 0f 1e fa          	endbr64
  11:	48 89 f8             	mov    %rdi,%rax
  14:	48 89 f7             	mov    %rsi,%rdi
  17:	48 89 d6             	mov    %rdx,%rsi
  1a:	48 89 ca             	mov    %rcx,%rdx
  1d:	4d 89 c2             	mov    %r8,%r10
  20:	4d 89 c8             	mov    %r9,%r8
  23:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa85
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 4b aa 0f 00 	mov    0xfaa4b(%rip),%rcx        # 0xfaa5b
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[   20.348321][  T394] RSP: 002b:00007ffea1044a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   20.348325][  T394] RAX: ffffffffffffffda RBX: 00005608bcba6810 RCX: 00007f426ea6237d
[   20.348327][  T394] RDX: 0000000000000000 RSI: 000056089e645ffd RDI: 0000000000000000
[   20.348329][  T394] RBP: 00007ffea1044ad0 R08: 0000000000000000 R09: 0000000000000000
[   20.348330][  T394] R10: 0000000000000000 R11: 0000000000000246 R12: 000056089e645ffd
[   20.348331][  T394] R13: 00005608bcba6960 R14: 0000000000040000 R15: 0000000000000000
| [   27.821369][  T630] softirqs last disabled at (25433): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   27.821372][  T630] Preemption disabled at:
| [   27.821373][  T630] 0x0
| [   27.821386][  T630] Tainted: [W]=WARN
[   27.821387][  T630] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   27.821389][  T630] Call Trace:
[   27.821391][  T630]  <TASK>
[   27.821393][  T630]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   27.821401][  T630]  __might_resched.cold (kernel/sched/core.c:9234)
[   27.821407][  T630]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   27.821413][  T630]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   27.821420][  T630]  __kmalloc_noprof (./include/linux/sched/mm.h:322 (discriminator 2) mm/slub.c:4636 (discriminator 2) mm/slub.c:4974 (discriminator 2) mm/slub.c:5413 (discriminator 2) mm/slub.c:5439 (discriminator 2))
[   27.821423][  T630]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   27.821432][  T630]  ? do_raw_spin_unlock (./include/linux/instrumented.h:82 ./include/linux/atomic/atomic-instrumented.h:32 ./include/asm-generic/qspinlock.h:58 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[   27.821435][  T630]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   27.821440][  T630]  put_chars (drivers/char/virtio_console.c:1176)
[   27.821444][  T630]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   27.821446][  T630]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   27.821453][  T630]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   27.821461][  T630]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   27.821471][  T630]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   27.821475][  T630]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.821478][  T630]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.821485][  T630]  console_emit_next_record (kernel/printk/printk.c:3183)
[   27.821491][  T630]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   27.821493][  T630]  ? console_flush_one_record (./include/linux/rcupdate.h:314 (discriminator 2) ./include/linux/srcu.h:439 (discriminator 2) kernel/printk/printk.c:291 (discriminator 2) kernel/printk/printk.c:3246 (discriminator 2))
[   27.821498][  T630]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.821502][  T630]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   27.821508][  T630]  console_flush_one_record (kernel/printk/printk.c:3268)
[   27.821515][  T630]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   27.821518][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.821527][  T630]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   27.821531][  T630]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   27.821533][  T630]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.821537][  T630]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   27.821543][  T630]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   27.821545][  T630]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   27.821551][  T630]  vprintk_emit (kernel/printk/printk.c:2479)
[   27.821556][  T630]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   27.821562][  T630]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   27.821568][  T630]  _printk (kernel/printk/printk.c:2504)
[   27.821573][  T630]  ? snapshot_read.cold (user.c:?)
[   27.821577][  T630]  ? do_raw_spin_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qspinlock.h:112 kernel/locking/spinlock_debug.c:116)
[   27.821581][  T630]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   27.821587][  T630]  ? do_raw_spin_lock (./include/linux/instrumented.h:55 ./include/linux/atomic/atomic-instrumented.h:1301 ./include/asm-generic/qspinlock.h:112 kernel/locking/spinlock_debug.c:116)
[   27.821591][  T630]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   27.821596][  T630]  ? exit_notify (kernel/exit.c:780)
[   27.821599][  T630]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   27.821603][  T630]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   27.821610][  T630]  do_group_exit (kernel/exit.c:1151)
[   27.821614][  T630]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   27.821617][  T630]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   27.821620][  T630]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   27.821624][  T630]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   27.821629][  T630]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   27.821632][  T630] RIP: 0033:0x7fb9c0bf01b8
[   27.821635][  T630] Code: Unable to access opcode bytes at 0x7fb9c0bf018e.

Code starting with the faulting instruction
===========================================
[   27.821637][  T630] RSP: 002b:00007ffc5329d338 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   27.821640][  T630] RAX: ffffffffffffffda RBX: 00007fb9c0d20f88 RCX: 00007fb9c0bf01b8
[   27.821642][  T630] RDX: 00007fb9c093afc8 RSI: fffffffffffffeb8 RDI: 0000000000000000
[   27.821643][  T630] RBP: 00007ffc5329d390 R08: 0000000000000000 R09: 0000000000000060
[   27.821645][  T630] R10: 00007ffc5329d150 R11: 0000000000000246 R12: 0000000000000001


Finger prints:
__irq_exit_rcu:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print
__irq_exit_rcu:vprintk_emit:dump_stack_lvl:__kmalloc_noprof:put_chars