======================================
| [    9.885560][  T170] softirqs last disabled at (22087): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [    9.885563][  T170] Preemption disabled at:
| [    9.885563][  T170] vprintk_emit (kernel/printk/printk.c:2471)
| [    9.885572][  T170] Tainted: [W]=WARN
[    9.885573][  T170] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.885574][  T170] Call Trace:
[    9.885576][  T170]  <TASK>
[    9.885577][  T170]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[    9.885582][  T170]  ? vprintk_emit (kernel/printk/printk.c:2471)
[    9.885584][  T170]  __might_resched.cold (kernel/sched/core.c:9234)
[    9.885589][  T170]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[    9.885592][  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)
[    9.885597][  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))
[    9.885599][  T170]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.885605][  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)
[    9.885607][  T170]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.885610][  T170]  put_chars (drivers/char/virtio_console.c:1176)
[    9.885613][  T170]  ? __send_to_port (drivers/char/virtio_console.c:654)
[    9.885615][  T170]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[    9.885620][  T170]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[    9.885626][  T170]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[    9.885628][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.885631][  T170]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.885635][  T170]  console_emit_next_record (kernel/printk/printk.c:3183)
[    9.885639][  T170]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[    9.885643][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.885645][  T170]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.885648][  T170]  console_flush_one_record (kernel/printk/printk.c:3268)
[    9.885652][  T170]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[    9.885654][  T170]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    9.885658][  T170]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[    9.885661][  T170]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[    9.885662][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.885664][  T170]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[    9.885668][  T170]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[    9.885669][  T170]  ? vprintk_emit (kernel/printk/printk.c:2478)
[    9.885672][  T170]  vprintk_emit (kernel/printk/printk.c:2479)
[    9.885676][  T170]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[    9.885677][  T170]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[    9.885681][  T170]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[    9.885682][  T170]  ? fast_dput (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) fs/dcache.c:948 (discriminator 2))
[    9.885687][  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
[    9.885691][  T170]  _printk (kernel/printk/printk.c:2504)
[    9.885695][  T170]  ? snapshot_read.cold (user.c:?)
[    9.885698][  T170]  ? __up_write (kernel/locking/rwsem.c:1422 (discriminator 1))
[    9.885701][  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
[    9.885705][  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)
[    9.885709][  T170] init_netconsole (drivers/net/netconsole.c:1286) netconsole
[    9.885713][  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
[    9.885719][  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
[    9.885722][  T170]  do_one_initcall (init/main.c:1357)
[    9.885725][  T170]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[    9.885730][  T170]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[    9.885733][  T170]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[    9.885743][  T170]  do_init_module (kernel/module/main.c:3117)
[    9.885746][  T170]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[    9.885750][  T170]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[    9.885753][  T170]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[    9.885757][  T170]  load_module (kernel/module/main.c:3593)
[    9.885763][  T170]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[    9.885767][  T170]  ? __ia32_sys_fsconfig (??:?)
[    9.885770][  T170]  ? ovl_real_file (fs/overlayfs/file.c:195)
[    9.885774][  T170]  ? backing_file_read_iter (fs/backing-file.c:211)
[    9.885777][  T170]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    9.885781][  T170]  init_module_from_file (kernel/module/main.c:3790)
[    9.885785][  T170]  ? __do_sys_init_module (kernel/module/main.c:3664)
[    9.885792][  T170]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[    9.885796][  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)
[    9.885799][  T170]  idempotent_init_module (kernel/module/main.c:3802)
[    9.885802][  T170]  ? init_module_from_file (kernel/module/main.c:3791)
[    9.885807][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.885809][  T170]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    9.885815][  T170]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[    9.885817][  T170]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[    9.885821][  T170]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[    9.885823][  T170]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[    9.885826][  T170]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.885829][  T170] RIP: 0033:0x7f82c189e37d
[    9.885832][  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
[    9.885834][  T170] RSP: 002b:00007fff2efd2aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    9.885837][  T170] RAX: ffffffffffffffda RBX: 000056101c2bd700 RCX: 00007f82c189e37d
[    9.885838][  T170] RDX: 0000000000000000 RSI: 0000560fdc896ffd RDI: 0000000000000005
[    9.885839][  T170] RBP: 00007fff2efd2b40 R08: 0000000000000000 R09: 0000000000000000
[    9.885840][  T170] R10: 0000000000000000 R11: 0000000000000246 R12: 0000560fdc896ffd
[    9.885841][  T170] R13: 000056101c2bd810 R14: 0000000000040000 R15: 0000000000000000
| [   12.351764][  T225] softirqs last disabled at (24581): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   12.351768][  T225] Preemption disabled at:
| [   12.351769][  T225] vprintk_emit (kernel/printk/printk.c:2471)
| [   12.351779][  T225] Tainted: [W]=WARN
[   12.351780][  T225] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   12.351782][  T225] Call Trace:
[   12.351784][  T225]  <TASK>
[   12.351786][  T225]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   12.351791][  T225]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   12.351793][  T225]  __might_resched.cold (kernel/sched/core.c:9234)
[   12.351798][  T225]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   12.351801][  T225]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   12.351806][  T225]  __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))
[   12.351808][  T225]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.351814][  T225]  ? 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)
[   12.351816][  T225]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   12.351819][  T225]  put_chars (drivers/char/virtio_console.c:1176)
[   12.351822][  T225]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   12.351824][  T225]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   12.351827][  T225]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   12.351830][  T225]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   12.351834][  T225]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   12.351836][  T225]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.351838][  T225]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.351842][  T225]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   12.351845][  T225]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.351848][  T225]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.351851][  T225]  console_emit_next_record (kernel/printk/printk.c:3183)
[   12.351855][  T225]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   12.351859][  T225]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.351861][  T225]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   12.351864][  T225]  console_flush_one_record (kernel/printk/printk.c:3268)
[   12.351868][  T225]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   12.351870][  T225]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   12.351875][  T225]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   12.351877][  T225]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   12.351879][  T225]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.351881][  T225]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   12.351884][  T225]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   12.351886][  T225]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   12.351889][  T225]  vprintk_emit (kernel/printk/printk.c:2479)
[   12.351892][  T225]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   12.351895][  T225]  ? _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)
[   12.351901][  T225]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   12.351905][  T225]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   12.351909][  T225]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   12.351910][  T225]  ? idr_get_free (??:?)
[   12.351914][  T225]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   12.351917][  T225]  ? _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)
[   12.351920][  T225]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   12.351922][  T225]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.351924][  T225]  ? handle_pte_fault (mm/memory.c:6558)
[   12.351929][  T225]  ? do_numa_page.isra.0 (mm/memory.c:6319 (discriminator 1))
[   12.351931][  T225]  ? vprintk_default (kernel/printk/printk.c:2494)
[   12.351933][  T225]  new_sync_write (fs/read_write.c:595)
[   12.351938][  T225]  ? new_sync_read (./include/linux/ioprio.h:41)
[   12.351940][  T225]  ? 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))
[   12.351948][  T225]  vfs_write (fs/read_write.c:687)
[   12.351952][  T225]  ksys_write (fs/read_write.c:739)
[   12.351955][  T225]  ? __ia32_sys_read (fs/read_write.c:723)
[   12.351957][  T225]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.351959][  T225]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   12.351962][  T225]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   12.351965][  T225]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   12.351968][  T225]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   12.351970][  T225] RIP: 0033:0x7ff9bf46f54e
[   12.351974][  T225] 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
[   12.351976][  T225] RSP: 002b:00007fff75076a70 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   12.351979][  T225] RAX: ffffffffffffffda RBX: 00007ff9bf5f0580 RCX: 00007ff9bf46f54e
[   12.351981][  T225] RDX: 0000000000000021 RSI: 000055c9287e5060 RDI: 0000000000000001
[   12.351982][  T225] RBP: 00007fff75076a80 R08: 0000000000000000 R09: 0000000000000000
[   12.351983][  T225] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000021
[   12.351984][  T225] R13: 0000000000000021 R14: 000055c9287e5060 R15: 00007ff9bf5f0668
| [   14.003686][  T278] softirqs last disabled at (11467): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [   14.003689][  T278] Preemption disabled at:
| [   14.003690][  T278] vprintk_emit (kernel/printk/printk.c:2471)
| [   14.003699][  T278] Tainted: [W]=WARN
[   14.003700][  T278] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.003702][  T278] Call Trace:
[   14.003704][  T278]  <TASK>
[   14.003705][  T278]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   14.003711][  T278]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   14.003713][  T278]  __might_resched.cold (kernel/sched/core.c:9234)
[   14.003717][  T278]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   14.003721][  T278]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   14.003725][  T278]  __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))
[   14.003727][  T278]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   14.003733][  T278]  ? 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)
[   14.003736][  T278]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   14.003739][  T278]  put_chars (drivers/char/virtio_console.c:1176)
[   14.003742][  T278]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   14.003743][  T278]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   14.003747][  T278]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   14.003750][  T278]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   14.003760][  T278]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   14.003763][  T278]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.003764][  T278]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.003768][  T278]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   14.003771][  T278]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.003774][  T278]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   14.003778][  T278]  console_emit_next_record (kernel/printk/printk.c:3183)
[   14.003782][  T278]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   14.003786][  T278]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.003788][  T278]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   14.003792][  T278]  console_flush_one_record (kernel/printk/printk.c:3268)
[   14.003796][  T278]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   14.003797][  T278]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   14.003802][  T278]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   14.003805][  T278]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   14.003807][  T278]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.003809][  T278]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   14.003812][  T278]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   14.003814][  T278]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   14.003817][  T278]  vprintk_emit (kernel/printk/printk.c:2479)
[   14.003821][  T278]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   14.003824][  T278]  ? _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)
[   14.003830][  T278]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   14.003834][  T278]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   14.003838][  T278]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   14.003840][  T278]  ? idr_get_free (??:?)
[   14.003843][  T278]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   14.003846][  T278]  ? _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)
[   14.003849][  T278]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   14.003852][  T278]  ? vprintk_default (kernel/printk/printk.c:2494)
[   14.003854][  T278]  ? handle_pte_fault (mm/memory.c:6558)
[   14.003858][  T278]  ? do_numa_page.isra.0 (mm/memory.c:6319 (discriminator 1))
[   14.003861][  T278]  ? vprintk_default (kernel/printk/printk.c:2494)
[   14.003863][  T278]  new_sync_write (fs/read_write.c:595)
[   14.003868][  T278]  ? new_sync_read (./include/linux/ioprio.h:41)
[   14.003869][  T278]  ? 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))
[   14.003878][  T278]  vfs_write (fs/read_write.c:687)
[   14.003882][  T278]  ksys_write (fs/read_write.c:739)
[   14.003885][  T278]  ? __ia32_sys_read (fs/read_write.c:723)
[   14.003887][  T278]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.003889][  T278]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   14.003892][  T278]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   14.003895][  T278]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   14.003898][  T278]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   14.003901][  T278] RIP: 0033:0x7f4eb20e754e
[   14.003905][  T278] 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
[   14.003907][  T278] RSP: 002b:00007ffc78651610 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   14.003910][  T278] RAX: ffffffffffffffda RBX: 00007f4eb2268580 RCX: 00007f4eb20e754e
[   14.003912][  T278] RDX: 0000000000000021 RSI: 000055b651760060 RDI: 0000000000000001
[   14.003913][  T278] RBP: 00007ffc78651620 R08: 0000000000000000 R09: 0000000000000000
[   14.003914][  T278] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000021


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