======================================
| [    8.624552][  T170] softirqs last disabled at (33573): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [    8.624555][  T170] Preemption disabled at:
| [    8.624555][  T170] vprintk_emit (kernel/printk/printk.c:2471)
| [    8.624564][  T170] Tainted: [W]=WARN
[    8.624565][  T170] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    8.624567][  T170] Call Trace:
[    8.624568][  T170]  <TASK>
[    8.624570][  T170]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[    8.624575][  T170]  ? vprintk_emit (kernel/printk/printk.c:2471)
[    8.624577][  T170]  __might_resched.cold (kernel/sched/core.c:9234)
[    8.624582][  T170]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[    8.624585][  T170]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[    8.624590][  T170]  __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))
[    8.624591][  T170]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    8.624597][  T170]  ? 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)
[    8.624599][  T170]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    8.624602][  T170]  put_chars (drivers/char/virtio_console.c:1176)
[    8.624605][  T170]  ? __send_to_port (drivers/char/virtio_console.c:654)
[    8.624608][  T170]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[    8.624613][  T170]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[    8.624619][  T170]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[    8.624621][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.624625][  T170]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    8.624628][  T170]  console_emit_next_record (kernel/printk/printk.c:3183)
[    8.624632][  T170]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[    8.624636][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.624637][  T170]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    8.624641][  T170]  console_flush_one_record (kernel/printk/printk.c:3268)
[    8.624645][  T170]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[    8.624646][  T170]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    8.624651][  T170]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[    8.624653][  T170]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[    8.624655][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.624657][  T170]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[    8.624660][  T170]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[    8.624661][  T170]  ? vprintk_emit (kernel/printk/printk.c:2478)
[    8.624664][  T170]  vprintk_emit (kernel/printk/printk.c:2479)
[    8.624668][  T170]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[    8.624669][  T170]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[    8.624673][  T170]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[    8.624674][  T170]  ? fast_dput (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) fs/dcache.c:948 (discriminator 2))
[    8.624679][  T170]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    8.624682][  T170]  _printk (kernel/printk/printk.c:2504)
[    8.624686][  T170]  ? snapshot_read.cold (user.c:?)
[    8.624689][  T170]  ? __up_write (kernel/locking/rwsem.c:1422 (discriminator 1))
[    8.624692][  T170]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    8.624696][  T170]  ? configfs_register_subsystem (./include/linux/instrumented.h:112 ./include/linux/atomic/atomic-instrumented.h:1383 fs/configfs/dir.c:173 fs/configfs/dir.c:171 fs/configfs/dir.c:1929)
[    8.624700][  T170] init_netconsole (drivers/net/netconsole.c:1286) netconsole
[    8.624704][  T170]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    8.624710][  T170]  ? cleanup_netconsole (./include/linux/list.h:99 (discriminator 2) ./include/linux/list.h:169 (discriminator 2) ./include/linux/list.h:206 (discriminator 2) ./include/linux/configfs.h:112 (discriminator 2) drivers/net/netconsole.c:1718 (discriminator 2)) netconsole
[    8.624713][  T170]  do_one_initcall (init/main.c:1357)
[    8.624716][  T170]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[    8.624721][  T170]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[    8.624724][  T170]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[    8.624729][  T170]  do_init_module (kernel/module/main.c:3117)
[    8.624732][  T170]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[    8.624737][  T170]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[    8.624740][  T170]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[    8.624743][  T170]  load_module (kernel/module/main.c:3593)
[    8.624750][  T170]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[    8.624753][  T170]  ? __ia32_sys_fsconfig (??:?)
[    8.624756][  T170]  ? ovl_real_file (fs/overlayfs/file.c:195)
[    8.624760][  T170]  ? backing_file_read_iter (fs/backing-file.c:211)
[    8.624764][  T170]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    8.624767][  T170]  init_module_from_file (kernel/module/main.c:3790)
[    8.624770][  T170]  ? __do_sys_init_module (kernel/module/main.c:3664)
[    8.624778][  T170]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[    8.624781][  T170]  ? 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)
[    8.624784][  T170]  idempotent_init_module (kernel/module/main.c:3802)
[    8.624787][  T170]  ? init_module_from_file (kernel/module/main.c:3791)
[    8.624793][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    8.624795][  T170]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    8.624801][  T170]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[    8.624802][  T170]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[    8.624807][  T170]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[    8.624808][  T170]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[    8.624811][  T170]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    8.624813][  T170] RIP: 0033:0x7f9f10aa137d
[    8.624816][  T170] 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
[    8.624818][  T170] RSP: 002b:00007ffdbb6cfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    8.624821][  T170] RAX: ffffffffffffffda RBX: 000055a0de256700 RCX: 00007f9f10aa137d
[    8.624822][  T170] RDX: 0000000000000000 RSI: 000055a09f6f4ffd RDI: 0000000000000005
[    8.624823][  T170] RBP: 00007ffdbb6cfd10 R08: 0000000000000000 R09: 0000000000000000
[    8.624824][  T170] R10: 0000000000000000 R11: 0000000000000246 R12: 000055a09f6f4ffd
[    8.624825][  T170] R13: 000055a0de256810 R14: 0000000000040000 R15: 0000000000000000
| [   10.817418][  T224] softirqs last disabled at (13389): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   10.817421][  T224] Preemption disabled at:
| [   10.817422][  T224] vprintk_emit (kernel/printk/printk.c:2471)
| [   10.817431][  T224] Tainted: [W]=WARN
[   10.817432][  T224] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   10.817434][  T224] Call Trace:
[   10.817435][  T224]  <TASK>
[   10.817437][  T224]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   10.817442][  T224]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   10.817444][  T224]  __might_resched.cold (kernel/sched/core.c:9234)
[   10.817449][  T224]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   10.817453][  T224]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   10.817457][  T224]  __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))
[   10.817459][  T224]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.817465][  T224]  ? 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)
[   10.817467][  T224]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   10.817470][  T224]  put_chars (drivers/char/virtio_console.c:1176)
[   10.817473][  T224]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   10.817475][  T224]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   10.817478][  T224]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   10.817481][  T224]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   10.817484][  T224]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   10.817487][  T224]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.817489][  T224]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.817492][  T224]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   10.817495][  T224]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.817499][  T224]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.817502][  T224]  console_emit_next_record (kernel/printk/printk.c:3183)
[   10.817506][  T224]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   10.817510][  T224]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.817512][  T224]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   10.817516][  T224]  console_flush_one_record (kernel/printk/printk.c:3268)
[   10.817519][  T224]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   10.817521][  T224]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   10.817526][  T224]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   10.817528][  T224]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   10.817530][  T224]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.817532][  T224]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   10.817535][  T224]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   10.817537][  T224]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   10.817540][  T224]  vprintk_emit (kernel/printk/printk.c:2479)
[   10.817543][  T224]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   10.817546][  T224]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   10.817551][  T224]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   10.817556][  T224]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   10.817559][  T224]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   10.817561][  T224]  ? idr_get_free (??:?)
[   10.817565][  T224]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   10.817568][  T224]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   10.817570][  T224]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   10.817573][  T224]  ? vprintk_default (kernel/printk/printk.c:2494)
[   10.817575][  T224]  ? handle_pte_fault (mm/memory.c:6558)
[   10.817580][  T224]  ? do_numa_page.isra.0 (mm/memory.c:6319 (discriminator 1))
[   10.817582][  T224]  ? vprintk_default (kernel/printk/printk.c:2494)
[   10.817584][  T224]  new_sync_write (fs/read_write.c:595)
[   10.817589][  T224]  ? new_sync_read (./include/linux/ioprio.h:41)
[   10.817590][  T224]  ? lock_vma_under_rcu (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) mm/mmap_lock.c:329 (discriminator 2))
[   10.817598][  T224]  vfs_write (fs/read_write.c:687)
[   10.817602][  T224]  ksys_write (fs/read_write.c:739)
[   10.817605][  T224]  ? __ia32_sys_read (fs/read_write.c:723)
[   10.817607][  T224]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.817609][  T224]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   10.817612][  T224]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   10.817615][  T224]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   10.817618][  T224]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   10.817620][  T224] RIP: 0033:0x7fe76220d54e
[   10.817624][  T224] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   10.817626][  T224] RSP: 002b:00007fffde8776d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   10.817629][  T224] RAX: ffffffffffffffda RBX: 00007fe76238e580 RCX: 00007fe76220d54e
[   10.817630][  T224] RDX: 0000000000000021 RSI: 000055e08cd0e060 RDI: 0000000000000001
[   10.817631][  T224] RBP: 00007fffde8776e0 R08: 0000000000000000 R09: 0000000000000000
[   10.817632][  T224] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000021
[   10.817633][  T224] R13: 0000000000000021 R14: 000055e08cd0e060 R15: 00007fe76238e668
| [   12.005168][  T272] softirqs last disabled at (12029): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   12.005171][  T272] Preemption disabled at:
| [   12.005172][  T272] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.005181][  T272] Tainted: [W]=WARN
[   12.005182][  T272] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.005183][  T272] Call Trace:
[   12.005185][  T272]  <TASK>
[   12.005187][  T272]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.005192][  T272]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.005194][  T272]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.005199][  T272]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.005202][  T272]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.005207][  T272]  __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))
[   12.005209][  T272]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.005215][  T272]  ? 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)
[   12.005217][  T272]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.005220][  T272]  put_chars (drivers/char/virtio_console.c:1176)
[   12.005223][  T272]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.005224][  T272]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   12.005228][  T272]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.005230][  T272]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.005235][  T272]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.005237][  T272]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.005239][  T272]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.005243][  T272]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.005246][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.005249][  T272]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.005252][  T272]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.005256][  T272]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.005260][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.005262][  T272]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.005266][  T272]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.005270][  T272]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.005271][  T272]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.005276][  T272]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.005279][  T272]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.005280][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.005283][  T272]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.005286][  T272]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.005288][  T272]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.005291][  T272]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.005294][  T272]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.005297][  T272]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   12.005303][  T272]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   12.005307][  T272]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   12.005311][  T272]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   12.005313][  T272]  ? idr_get_free (??:?)
[   12.005317][  T272]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   12.005319][  T272]  ? _copy_from_iter (./include/linux/instrumented.h:146 lib/iov_iter.c:66 ./include/linux/iov_iter.h:30 ./include/linux/iov_iter.h:302 ./include/linux/iov_iter.h:330 lib/iov_iter.c:261 lib/iov_iter.c:272)
[   12.005322][  T272]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   12.005325][  T272]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.005327][  T272]  ? handle_pte_fault (mm/memory.c:6558)
[   12.005332][  T272]  ? do_numa_page.isra.0 (mm/memory.c:6319 (discriminator 1))
[   12.005334][  T272]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.005336][  T272]  new_sync_write (fs/read_write.c:595)
[   12.005341][  T272]  ? new_sync_read (./include/linux/ioprio.h:41)
[   12.005342][  T272]  ? lock_vma_under_rcu (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) mm/mmap_lock.c:329 (discriminator 2))
[   12.005351][  T272]  vfs_write (fs/read_write.c:687)
[   12.005355][  T272]  ksys_write (fs/read_write.c:739)
[   12.005358][  T272]  ? __ia32_sys_read (fs/read_write.c:723)
[   12.005360][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.005362][  T272]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.005366][  T272]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.005368][  T272]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.005371][  T272]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.005373][  T272] RIP: 0033:0x7f389247954e
[   12.005377][  T272] Code: 4d 89 d8 e8 b4 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 <c9> c3 83 e2 39 83 fa 08 75 e7 e8 03 ff ff ff 0f 1f 00 f3 0f 1e fa
All code
========
   0:	4d 89 d8             	mov    %r11,%r8
   3:	e8 b4 bd 00 00       	call   0xbdbc
   8:	4c 8b 5d f8          	mov    -0x8(%rbp),%r11
   c:	41 8b 93 08 03 00 00 	mov    0x308(%r11),%edx
  13:	59                   	pop    %rcx
  14:	5e                   	pop    %rsi
  15:	48 83 f8 fc          	cmp    $0xfffffffffffffffc,%rax
  19:	74 11                	je     0x2c
  1b:	c9                   	leave
  1c:	c3                   	ret
  1d:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  24:	48 8b 45 10          	mov    0x10(%rbp),%rax
  28:	0f 05                	syscall
  2a:*	c9                   	leave		<-- trapping instruction
  2b:	c3                   	ret
  2c:	83 e2 39             	and    $0x39,%edx
  2f:	83 fa 08             	cmp    $0x8,%edx
  32:	75 e7                	jne    0x1b
  34:	e8 03 ff ff ff       	call   0xffffffffffffff3c
  39:	0f 1f 00             	nopl   (%rax)
  3c:	f3 0f 1e fa          	endbr64

Code starting with the faulting instruction
===========================================
   0:	c9                   	leave
   1:	c3                   	ret
   2:	83 e2 39             	and    $0x39,%edx
   5:	83 fa 08             	cmp    $0x8,%edx
   8:	75 e7                	jne    0xfffffffffffffff1
   a:	e8 03 ff ff ff       	call   0xffffffffffffff12
   f:	0f 1f 00             	nopl   (%rax)
  12:	f3 0f 1e fa          	endbr64
[   12.005379][  T272] RSP: 002b:00007ffca11afd70 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   12.005382][  T272] RAX: ffffffffffffffda RBX: 00007f38925fa580 RCX: 00007f389247954e
[   12.005383][  T272] RDX: 0000000000000021 RSI: 00005562942f1060 RDI: 0000000000000001
[   12.005385][  T272] RBP: 00007ffca11afd80 R08: 0000000000000000 R09: 0000000000000000
[   12.005386][  T272] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000021


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