======================================
| [    9.346542][  T170] softirqs last disabled at (31895): __irq_exit_rcu (kernel/softirq.c:679 kernel/softirq.c:519 kernel/softirq.c:767)
| [    9.346545][  T170] Preemption disabled at:
| [    9.346546][  T170] vprintk_emit (kernel/printk/printk.c:2471)
| [    9.346555][  T170] Tainted: [W]=WARN
[    9.346555][  T170] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    9.346557][  T170] Call Trace:
[    9.346559][  T170]  <TASK>
[    9.346561][  T170]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[    9.346566][  T170]  ? vprintk_emit (kernel/printk/printk.c:2471)
[    9.346568][  T170]  __might_resched.cold (kernel/sched/core.c:9234)
[    9.346579][  T170]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[    9.346584][  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)
[    9.346588][  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))
[    9.346590][  T170]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.346596][  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)
[    9.346598][  T170]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[    9.346601][  T170]  put_chars (drivers/char/virtio_console.c:1176)
[    9.346604][  T170]  ? __send_to_port (drivers/char/virtio_console.c:654)
[    9.346607][  T170]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[    9.346612][  T170]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[    9.346618][  T170]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[    9.346620][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.346624][  T170]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.346627][  T170]  console_emit_next_record (kernel/printk/printk.c:3183)
[    9.346631][  T170]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[    9.346635][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.346637][  T170]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[    9.346641][  T170]  console_flush_one_record (kernel/printk/printk.c:3268)
[    9.346645][  T170]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[    9.346646][  T170]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[    9.346651][  T170]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[    9.346654][  T170]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[    9.346655][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.346657][  T170]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[    9.346661][  T170]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[    9.346662][  T170]  ? vprintk_emit (kernel/printk/printk.c:2478)
[    9.346665][  T170]  vprintk_emit (kernel/printk/printk.c:2479)
[    9.346669][  T170]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[    9.346671][  T170]  ? find_held_lock (kernel/locking/lockdep.c:5367)
[    9.346675][  T170]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[    9.346676][  T170]  ? fast_dput (./include/linux/rcupdate.h:319 (discriminator 2) ./include/linux/rcupdate.h:880 (discriminator 2) fs/dcache.c:948 (discriminator 2))
[    9.346680][  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
[    9.346686][  T170]  _printk (kernel/printk/printk.c:2504)
[    9.346690][  T170]  ? snapshot_read.cold (user.c:?)
[    9.346693][  T170]  ? __up_write (kernel/locking/rwsem.c:1422 (discriminator 1))
[    9.346696][  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
[    9.346700][  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)
[    9.346704][  T170] init_netconsole (drivers/net/netconsole.c:1286) netconsole
[    9.346708][  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
[    9.346715][  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
[    9.346717][  T170]  do_one_initcall (init/main.c:1357)
[    9.346721][  T170]  ? trace_event_raw_event_initcall_level (./include/trace/events/initcall.h:10)
[    9.346726][  T170]  ? do_init_module (./include/linux/slab.h:991 (discriminator 1) kernel/module/main.c:3105 (discriminator 1))
[    9.346729][  T170]  ? kasan_unpoison (mm/kasan/shadow.c:146 mm/kasan/shadow.c:178)
[    9.346734][  T170]  do_init_module (kernel/module/main.c:3117)
[    9.346737][  T170]  ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4488)
[    9.346742][  T170]  ? free_module (./include/trace/events/module.h:50 (discriminator 19))
[    9.346745][  T170]  ? kfree (./include/linux/kasan.h:235 mm/slub.c:2748 mm/slub.c:6499 mm/slub.c:6792)
[    9.346748][  T170]  load_module (kernel/module/main.c:3593)
[    9.346755][  T170]  ? layout_and_allocate.isra.0 (kernel/module/main.c:3016)
[    9.346759][  T170]  ? __ia32_sys_fsconfig (??:?)
[    9.346762][  T170]  ? ovl_real_file (fs/overlayfs/file.c:195)
[    9.346765][  T170]  ? backing_file_read_iter (fs/backing-file.c:211)
[    9.346769][  T170]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[    9.346773][  T170]  init_module_from_file (kernel/module/main.c:3790)
[    9.346776][  T170]  ? __do_sys_init_module (kernel/module/main.c:3664)
[    9.346784][  T170]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[    9.346787][  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)
[    9.346790][  T170]  idempotent_init_module (kernel/module/main.c:3802)
[    9.346794][  T170]  ? init_module_from_file (kernel/module/main.c:3791)
[    9.346800][  T170]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[    9.346802][  T170]  ? cap_capable (./include/trace/events/capability.h:26 (discriminator 22) security/commoncap.c:130 (discriminator 22))
[    9.346808][  T170]  __x64_sys_finit_module (kernel/module/main.c:3828 kernel/module/main.c:3812 kernel/module/main.c:3812)
[    9.346810][  T170]  ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40 (discriminator 22))
[    9.346814][  T170]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[    9.346816][  T170]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[    9.346818][  T170]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[    9.346821][  T170] RIP: 0033:0x7ff56da2537d
[    9.346825][  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
[    9.346826][  T170] RSP: 002b:00007ffe260b8878 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    9.346829][  T170] RAX: ffffffffffffffda RBX: 0000557faf6d7700 RCX: 00007ff56da2537d
[    9.346830][  T170] RDX: 0000000000000000 RSI: 0000557f783f0ffd RDI: 0000000000000005
[    9.346831][  T170] RBP: 00007ffe260b8910 R08: 0000000000000000 R09: 0000000000000000
[    9.346832][  T170] R10: 0000000000000000 R11: 0000000000000246 R12: 0000557f783f0ffd
[    9.346833][  T170] R13: 0000557faf6d7810 R14: 0000000000040000 R15: 0000000000000000
| [   11.633097][  T158] softirqs last disabled at (136052): restore_fpregs_from_user (./include/linux/bottom_half.h:20 (discriminator 2) ./arch/x86/include/asm/fpu/api.h:69 (discriminator 2) arch/x86/kernel/fpu/signal.c:277 (discriminator 2))
| [   11.633100][  T158] Preemption disabled at:
| [   11.633100][  T158] vprintk_emit (kernel/printk/printk.c:2471)
| [   11.633109][  T158] Tainted: [W]=WARN
[   11.633110][  T158] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.633112][  T158] Call Trace:
[   11.633114][  T158]  <TASK>
[   11.633116][  T158]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.633121][  T158]  ? vprintk_emit (kernel/printk/printk.c:2471)
[   11.633123][  T158]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.633128][  T158]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.633136][  T158]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.633141][  T158]  __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))
[   11.633143][  T158]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.633149][  T158]  ? 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)
[   11.633151][  T158]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.633154][  T158]  put_chars (drivers/char/virtio_console.c:1176)
[   11.633157][  T158]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.633159][  T158]  ? printk_get_next_message (kernel/printk/printk.c:3072)
[   11.633162][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.633165][  T158]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.633169][  T158]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.633172][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.633173][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.633177][  T158]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.633180][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.633183][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.633186][  T158]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.633190][  T158]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.633194][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.633196][  T158]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.633200][  T158]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.633204][  T158]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.633205][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.633210][  T158]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.633213][  T158]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.633214][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.633216][  T158]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.633219][  T158]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.633221][  T158]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.633224][  T158]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.633227][  T158]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.633230][  T158]  ? _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)
[   11.633236][  T158]  devkmsg_emit.constprop.0 (kernel/printk/printk.c:733)
[   11.633240][  T158]  ? vprintk_emit.cold (kernel/printk/printk.c:2449)
[   11.633244][  T158]  ? __kmalloc_noprof (mm/slub.c:5415 mm/slub.c:5439)
[   11.633246][  T158]  ? idr_get_free (??:?)
[   11.633250][  T158]  ? devkmsg_write (./include/linux/slab.h:995 kernel/printk/printk.c:762)
[   11.633253][  T158]  ? _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)
[   11.633255][  T158]  devkmsg_write.cold (kernel/printk/printk.c:796)
[   11.633258][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   11.633260][  T158]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.633262][  T158]  ? vfs_lock_file (./include/linux/fs.h:1348)
[   11.633266][  T158]  ? vprintk_default (kernel/printk/printk.c:2494)
[   11.633269][  T158]  new_sync_write (fs/read_write.c:595)
[   11.633273][  T158]  ? new_sync_read (./include/linux/ioprio.h:41)
[   11.633275][  T158]  ? rcu_read_lock_any_held (./include/linux/lockdep.h:249 kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[   11.633283][  T158]  vfs_write (fs/read_write.c:687)
[   11.633287][  T158]  ksys_write (fs/read_write.c:739)
[   11.633289][  T158]  ? __ia32_sys_read (fs/read_write.c:723)
[   11.633291][  T158]  ? 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)
[   11.633293][  T158]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.633297][  T158]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.633299][  T158]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.633302][  T158]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.633305][  T158] RIP: 0033:0x7fb51b1b954e
[   11.633309][  T158] 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
[   11.633310][  T158] RSP: 002b:00007ffeb3c700f0 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
[   11.633313][  T158] RAX: ffffffffffffffda RBX: 00007fb51b33a580 RCX: 00007fb51b1b954e
[   11.633315][  T158] RDX: 00000000000003be RSI: 000055e35e13a390 RDI: 0000000000000001
[   11.633316][  T158] RBP: 00007ffeb3c70100 R08: 0000000000000000 R09: 0000000000000000
[   11.633317][  T158] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000003be


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