======================================
| [   11.045297][  T157] softirqs last disabled at (35888): 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))
| [   11.045299][  T157] Preemption disabled at:
| [   11.045300][  T157] 0x0
| [   11.045310][  T157] Tainted: [W]=WARN
[   11.045311][  T157] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   11.045313][  T157] Call Trace:
[   11.045314][  T157]  <TASK>
[   11.045316][  T157]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   11.045321][  T157]  __might_resched.cold (kernel/sched/core.c:9234)
[   11.045325][  T157]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   11.045328][  T157]  ? __kmalloc_noprof (./include/linux/sched/mm.h:317 mm/slub.c:4636 mm/slub.c:4974 mm/slub.c:5413 mm/slub.c:5439)
[   11.045333][  T157]  __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))
[   11.045336][  T157]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.045342][  T157]  ? 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)
[   11.045345][  T157]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   11.045348][  T157]  put_chars (drivers/char/virtio_console.c:1176)
[   11.045351][  T157]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   11.045352][  T157]  ? rcu_lockdep_current_cpu_online (kernel/rcu/tree.c:4116 (discriminator 3) kernel/rcu/tree.c:4108 (discriminator 3))
[   11.045357][  T157]  ? validate_chain (kernel/locking/lockdep.c:3817 (discriminator 2) kernel/locking/lockdep.c:3837 (discriminator 2) kernel/locking/lockdep.c:3892 (discriminator 2))
[   11.045362][  T157]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   11.045368][  T157]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   11.045370][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.045372][  T157]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.045376][  T157]  console_emit_next_record (kernel/printk/printk.c:3183)
[   11.045379][  T157]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   11.045381][  T157]  ? 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))
[   11.045383][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.045385][  T157]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   11.045389][  T157]  console_flush_one_record (kernel/printk/printk.c:3268)
[   11.045392][  T157]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   11.045393][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.045399][  T157]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   11.045401][  T157]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   11.045402][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.045404][  T157]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   11.045407][  T157]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   11.045409][  T157]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   11.045412][  T157]  vprintk_emit (kernel/printk/printk.c:2479)
[   11.045415][  T157]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   11.045417][  T157]  ? __lock_acquire (kernel/locking/lockdep.c:5254)
[   11.045421][  T157]  _printk (kernel/printk/printk.c:2504)
[   11.045425][  T157]  ? snapshot_read.cold (user.c:?)
[   11.045427][  T157]  ? 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)
[   11.045430][  T157]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   11.045434][  T157]  ? 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)
[   11.045437][  T157]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   11.045440][  T157]  ? exit_notify (kernel/exit.c:780)
[   11.045441][  T157]  ? __lock_release.isra.0 (kernel/locking/lockdep.c:5554)
[   11.045444][  T157]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   11.045447][  T157]  do_group_exit (kernel/exit.c:1151)
[   11.045450][  T157]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   11.045452][  T157]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   11.045455][  T157]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   11.045459][  T157]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   11.045462][  T157]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   11.045463][  T157] RIP: 0033:0x7f8caad8f1b8
[   11.045466][  T157] Code: Unable to access opcode bytes at 0x7f8caad8f18e.

Code starting with the faulting instruction
===========================================
[   11.045467][  T157] RSP: 002b:00007ffcc414d7c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   11.045469][  T157] RAX: ffffffffffffffda RBX: 00007f8caaebff88 RCX: 00007f8caad8f1b8
[   11.045470][  T157] RDX: 00007f8caaccde88 RSI: ffffffffffffffb0 RDI: 0000000000000000
[   11.045471][  T157] RBP: 00007ffcc414d820 R08: 0000000000000000 R09: 0000000000000000
[   11.045472][  T157] R10: 00007ffcc414d660 R11: 0000000000000246 R12: 0000000000000001


Finger prints:
restore_fpregs_from_user:dump_stack_lvl:__kmalloc_noprof:put_chars:hvc_console_print