======================================
| [    8.868938][  T179] softirqs last disabled at (34471): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [    8.868940][  T179] Preemption disabled at:
| [    8.868941][  T179] vprintk_emit (kernel/printk/printk.c:2471)
| [    8.868950][  T179] Tainted: [W]=WARN
[    8.868950][  T179] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.868952][  T179] Call Trace:
[    8.868954][  T179]  <TASK>
[    8.868955][  T179]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[    8.868961][  T179]  ? vprintk_emit (kernel/printk/printk.c:2471)
[    8.868963][  T179]  __might_resched.cold (kernel/sched/core.c:9234)
[    8.868968][  T179]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[    8.868972][  T179]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[    8.868977][  T179]  __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))
[    8.868979][  T179]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    8.868985][  T179]  ? 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)
[    8.868987][  T179]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    8.868990][  T179]  put_chars (drivers/char/virtio_console.c:1176)
[    8.868993][  T179]  ? __send_to_port (drivers/char/virtio_console.c:654)
[    8.868995][  T179]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    8.869000][  T179]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[    8.869002][  T179]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[    8.869006][  T179]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[    8.869009][  T179]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    8.869014][  T179]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[    8.869017][  T179]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.869022][  T179]  console_emit_next_record (kernel/printk/printk.c:3183)
[    8.869025][  T179]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[    8.869027][  T179]  ? 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))
[    8.869030][  T179]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.869032][  T179]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    8.869036][  T179]  console_flush_one_record (kernel/printk/printk.c:3268)
[    8.869040][  T179]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[    8.869042][  T179]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    8.869047][  T179]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[    8.869049][  T179]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[    8.869051][  T179]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.869053][  T179]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[    8.869057][  T179]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[    8.869059][  T179]  ? vprintk_emit (kernel/printk/printk.c:2478)
[    8.869062][  T179]  vprintk_emit (kernel/printk/printk.c:2479)
[    8.869066][  T179]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[    8.869071][  T179]  ? ppp_cleanup (drivers/net/ppp/ppp_generic.c:1603) ppp_generic
[    8.869075][  T179]  _printk (kernel/printk/printk.c:2504)
[    8.869078][  T179]  ? snapshot_read.cold (user.c:?)
[    8.869085][  T179]  ? 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)
[    8.869088][  T179] ppp_init (ppp_generic.mod.c:?) ppp_generic
[    8.869091][  T179]  do_one_initcall (init/main.c:1357)
[    8.869094][  T179]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[    8.869098][  T179]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[    8.869101][  T179]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[    8.869106][  T179]  do_init_module (kernel/module/main.c:3117)
[    8.869110][  T179]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[    8.869113][  T179]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[    8.869116][  T179]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[    8.869120][  T179]  load_module (kernel/module/main.c:3593)
[    8.869127][  T179]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[    8.869132][  T179]  ? backing_file_read_iter (fs/backing-file.c:211)
[    8.869135][  T179]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    8.869139][  T179]  init_module_from_file (kernel/module/main.c:3790)
[    8.869142][  T179]  ? __do_sys_init_module (kernel/module/main.c:3664)
[    8.869150][  T179]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[    8.869153][  T179]  ? 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)
[    8.869156][  T179]  idempotent_init_module (kernel/module/main.c:3802)
[    8.869159][  T179]  ? init_module_from_file (kernel/module/main.c:3791)
[    8.869165][  T179]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.869168][  T179]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    8.869174][  T179]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[    8.869176][  T179]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[    8.869180][  T179]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[    8.869182][  T179]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[    8.869184][  T179]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.869186][  T179] RIP: 0033:0x7f05944bc37d
[    8.869190][  T179] 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
[    8.869191][  T179] RSP: 002b:00007ffd4a4bc288 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    8.869194][  T179] RAX: ffffffffffffffda RBX: 000055707e719d20 RCX: 00007f05944bc37d
[    8.869195][  T179] RDX: 0000000000000000 RSI: 00005570439fcffd RDI: 0000000000000006
[    8.869196][  T179] RBP: 00007ffd4a4bc320 R08: 0000000000000000 R09: 0000000000000000
[    8.869197][  T179] R10: 0000000000000000 R11: 0000000000000246 R12: 00005570439fcffd
[    8.869198][  T179] R13: 000055707e719cd0 R14: 0000000000040000 R15: 0000000000000000
| [   12.267209][  T192] softirqs last disabled at (22623): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   12.267211][  T192] Preemption disabled at:
| [   12.267212][  T192] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.267221][  T192] Tainted: [W]=WARN
[   12.267222][  T192] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.267223][  T192] Call Trace:
[   12.267225][  T192]  <TASK>
[   12.267226][  T192]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.267232][  T192]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.267234][  T192]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.267238][  T192]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.267243][  T192]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.267247][  T192]  __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))
[   12.267250][  T192]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.267256][  T192]  ? 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)
[   12.267259][  T192]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.267262][  T192]  put_chars (drivers/char/virtio_console.c:1176)
[   12.267265][  T192]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.267266][  T192]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.267271][  T192]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.267273][  T192]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.267278][  T192]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.267281][  T192]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.267286][  T192]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.267288][  T192]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.267294][  T192]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.267297][  T192]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.267299][  T192]  ? 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))
[   12.267304][  T192]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.267307][  T192]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.267310][  T192]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.267315][  T192]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.267316][  T192]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.267321][  T192]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.267324][  T192]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.267326][  T192]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.267328][  T192]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.267332][  T192]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.267333][  T192]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.267337][  T192]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.267340][  T192]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.267346][  T192]  ? ppp_cleanup (drivers/net/ppp/ppp_generic.c:1603) ppp_generic
[   12.267349][  T192]  _printk (kernel/printk/printk.c:2504)
[   12.267353][  T192]  ? snapshot_read.cold (user.c:?)
[   12.267357][  T192]  ? ppp_cleanup (drivers/net/ppp/ppp_generic.c:1603) ppp_generic
[   12.267359][  T192]  ? 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)
[   12.267361][  T192]  ? ppp_cleanup (drivers/net/ppp/ppp_generic.c:1603) ppp_generic
[   12.267364][  T192]  ? 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)
[   12.267367][  T192] bsdcomp_init (drivers/net/ppp/bsd_comp.c:297) bsd_comp
[   12.267370][  T192]  do_one_initcall (init/main.c:1357)
[   12.267373][  T192]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[   12.267377][  T192]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[   12.267380][  T192]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[   12.267385][  T192]  do_init_module (kernel/module/main.c:3117)
[   12.267389][  T192]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[   12.267392][  T192]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[   12.267395][  T192]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[   12.267399][  T192]  load_module (kernel/module/main.c:3593)
[   12.267406][  T192]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[   12.267410][  T192]  ? __ia32_sys_fsconfig (??:?)
[   12.267413][  T192]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[   12.267416][  T192]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   12.267420][  T192]  init_module_from_file (kernel/module/main.c:3790)
[   12.267423][  T192]  ? __do_sys_init_module (kernel/module/main.c:3664)
[   12.267430][  T192]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   12.267434][  T192]  ? 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)
[   12.267437][  T192]  idempotent_init_module (kernel/module/main.c:3802)
[   12.267440][  T192]  ? init_module_from_file (kernel/module/main.c:3791)
[   12.267446][  T192]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.267452][  T192]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[   12.267459][  T192]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[   12.267461][  T192]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[   12.267464][  T192]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.267467][  T192]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.267469][  T192]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.267472][  T192] RIP: 0033:0x7f79bd15a37d
[   12.267475][  T192] 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
[   12.267477][  T192] RSP: 002b:00007ffecd872e48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   12.267479][  T192] RAX: ffffffffffffffda RBX: 000055828acb6810 RCX: 00007f79bd15a37d
[   12.267480][  T192] RDX: 0000000000000000 RSI: 000055827a31dffd RDI: 0000000000000000
[   12.267481][  T192] RBP: 00007ffecd872ee0 R08: 0000000000000000 R09: 0000000000000000
[   12.267482][  T192] R10: 0000000000000000 R11: 0000000000000246 R12: 000055827a31dffd
[   12.267483][  T192] R13: 000055828acb69e0 R14: 0000000000040000 R15: 0000000000000000
| [   16.851800][  T220] softirqs last disabled at (867199): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   16.851803][  T220] Preemption disabled at:
| [   16.851804][  T220] 0x0
| [   16.851814][  T220] Tainted: [W]=WARN
[   16.851815][  T220] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.851816][  T220] Call Trace:
[   16.851818][  T220]  <TASK>
[   16.851820][  T220]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   16.851826][  T220]  __might_resched.cold (kernel/sched/core.c:9234)
[   16.851830][  T220]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   16.851834][  T220]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   16.851839][  T220]  __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))
[   16.851842][  T220]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   16.851848][  T220]  ? 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)
[   16.851850][  T220]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   16.851854][  T220]  put_chars (drivers/char/virtio_console.c:1176)
[   16.851856][  T220]  ? prb_final_commit (kernel/printk/printk_ringbuffer.c:1842)
[   16.851858][  T220]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   16.851861][  T220]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   16.851865][  T220]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   16.851867][  T220]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   16.851871][  T220]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   16.851874][  T220]  ? mark_usage (kernel/locking/lockdep.c:4690)
[   16.851876][  T220]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   16.851878][  T220]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   16.851882][  T220]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   16.851884][  T220]  ? console_emit_next_record (kernel/printk/printk.c:3095 (discriminator 2) kernel/printk/printk.c:3182 (discriminator 2))
[   16.851887][  T220]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   16.851889][  T220]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   16.851893][  T220]  console_emit_next_record (kernel/printk/printk.c:3183)
[   16.851897][  T220]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   16.851899][  T220]  ? 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))
[   16.851902][  T220]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   16.851904][  T220]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   16.851908][  T220]  console_flush_one_record (kernel/printk/printk.c:3268)
[   16.851912][  T220]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   16.851914][  T220]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   16.851919][  T220]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   16.851922][  T220]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   16.851923][  T220]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   16.851926][  T220]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   16.851929][  T220]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   16.851931][  T220]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   16.851934][  T220]  vprintk_emit (kernel/printk/printk.c:2479)
[   16.851938][  T220]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   16.851941][  T220]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   16.851945][  T220]  _printk (kernel/printk/printk.c:2504)
[   16.851948][  T220]  ? snapshot_read.cold (user.c:?)
[   16.851951][  T220]  ? 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)
[   16.851953][  T220]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   16.851957][  T220]  ? 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)
[   16.851960][  T220]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   16.851963][  T220]  ? exit_notify (kernel/exit.c:780)
[   16.851968][  T220]  __x64_sys_exit (kernel/exit.c:1118 kernel/exit.c:1116 kernel/exit.c:1116)
[   16.851970][  T220]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:61)
[   16.851973][  T220]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   16.851977][  T220]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   16.851980][  T220]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   16.851982][  T220] RIP: 0033:0x7f77560fdc49
[   16.851984][  T220] Code: Unable to access opcode bytes at 0x7f77560fdc1f.

Code starting with the faulting instruction
===========================================
[   16.851985][  T220] RSP: 002b:00007f77558bce60 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
[   16.851988][  T220] RAX: ffffffffffffffda RBX: 00007f77558bd6c0 RCX: 00007f77560fdc49
[   16.851989][  T220] RDX: 0000000000000000 RSI: 0000000000801000 RDI: 0000000000000000
[   16.851990][  T220] RBP: 00007f77558bcf70 R08: 0000000000000001 R09: 00007f77558bd6c0
[   16.851991][  T220] R10: 0000000000000008 R11: 0000000000000246 R12: 00007f77550bd000


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