======================================
| [   19.104756][  T876] softirqs last disabled at (0): 0x0
| [   19.104758][  T876] Preemption disabled at:
| [   19.104759][  T876] 0x0
| [   19.104766][  T876] Tainted: [W]=WARN
[   19.104767][  T876] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.104769][  T876] Call Trace:
[   19.104770][  T876]  <TASK>
[   19.104771][  T876]  dump_stack_lvl (lib/dump_stack.c:94 lib/dump_stack.c:120)
[   19.104776][  T876]  __might_resched.cold (kernel/sched/core.c:9234)
[   19.104779][  T876]  ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   19.104781][  T876]  ? perf_trace_sched_switch (./include/linux/list.h:1037 (discriminator 3))
[   19.104784][  T876]  ? __asan_memcpy (mm/kasan/shadow.c:106 (discriminator 1))
[   19.104788][  T876]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.104791][  T876]  __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))
[   19.104794][  T876]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   19.104796][  T876]  ? alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   19.104801][  T876]  ? 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)
[   19.104802][  T876]  alloc_buf.isra.0 (./include/linux/slab.h:995 drivers/char/virtio_console.c:429)
[   19.104805][  T876]  put_chars (drivers/char/virtio_console.c:1176)
[   19.104807][  T876]  ? __send_to_port (drivers/char/virtio_console.c:654)
[   19.104809][  T876]  ? console_prepend_replay (kernel/printk/printk.c:3005)
[   19.104812][  T876]  hvc_console_print (drivers/tty/hvc/hvc_console.c:177 (discriminator 2))
[   19.104816][  T876]  ? hvc_write (drivers/tty/hvc/hvc_console.c:501)
[   19.104818][  T876]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.104820][  T876]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   19.104821][  T876]  console_emit_next_record (kernel/printk/printk.c:3183)
[   19.104824][  T876]  ? devkmsg_read (./arch/x86/include/asm/atomic64_64.h:20)
[   19.104826][  T876]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.104827][  T876]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.104828][  T876]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.104830][  T876]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   19.104831][  T876]  ? console_flush_one_record (kernel/printk/printk.c:3247)
[   19.104833][  T876]  console_flush_one_record (kernel/printk/printk.c:3268)
[   19.104835][  T876]  ? console_emit_next_record (kernel/printk/printk.c:3150)
[   19.104837][  T876]  console_unlock (kernel/printk/printk.c:3350 kernel/printk/printk.c:3380 kernel/printk/printk.c:3420)
[   19.104839][  T876]  ? lock_acquire (./include/trace/events/lock.h:23 (discriminator 22) kernel/locking/lockdep.c:5871 (discriminator 22))
[   19.104840][  T876]  ? console_flush_one_record (kernel/printk/printk.c:3316)
[   19.104841][  T876]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.104843][  T876]  ? lock_release (./include/trace/events/lock.h:68 (discriminator 22) kernel/locking/lockdep.c:5920 (discriminator 22))
[   19.104844][  T876]  ? lock_acquire (kernel/locking/lockdep.c:5913)
[   19.104845][  T876]  ? __rcu_read_lock (kernel/rcu/tree_plugin.h:391 (discriminator 6) kernel/rcu/tree_plugin.h:414 (discriminator 6))
[   19.104847][  T876]  ? __down_trylock_console_sem (kernel/printk/printk.c:334)
[   19.104849][  T876]  ? vprintk_emit (kernel/printk/printk.c:2478)
[   19.104851][  T876]  vprintk_emit (kernel/printk/printk.c:2479)
[   19.104853][  T876]  ? wake_up_klogd_work_func (kernel/printk/printk.c:4603 (discriminator 126))
[   19.104854][  T876]  ? do_raw_read_unlock (kernel/locking/spinlock_debug.c:180)
[   19.104856][  T876]  ? forget_original_parent (kernel/exit.c:635 kernel/exit.c:740)
[   19.104858][  T876]  _printk (kernel/printk/printk.c:2504)
[   19.104861][  T876]  ? snapshot_read.cold (user.c:?)
[   19.104863][  T876]  ? 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)
[   19.104864][  T876]  ? 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)
[   19.104866][  T876]  ? __rwlock_init (kernel/locking/spinlock_debug.c:48)
[   19.104868][  T876]  ? 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)
[   19.104869][  T876]  do_exit.cold (kernel/exit.c:889 (discriminator 4) kernel/exit.c:1043 (discriminator 4))
[   19.104872][  T876]  ? exit_notify (kernel/exit.c:780)
[   19.104874][  T876]  ? posixtimer_sig_unignore.isra.0 (kernel/signal.c:1971 (discriminator 3))
[   19.104876][  T876]  ? rcu_is_watching (./include/linux/context_tracking.h:128 (discriminator 3) kernel/rcu/tree.c:753 (discriminator 3))
[   19.104878][  T876]  do_group_exit (kernel/exit.c:1151)
[   19.104881][  T876]  __x64_sys_exit_group (kernel/exit.c:1162 kernel/exit.c:1160 kernel/exit.c:1160)
[   19.104882][  T876]  x64_sys_call (./arch/x86/include/generated/asm/syscalls_64.h:232)
[   19.104884][  T876]  do_syscall_64 (arch/x86/entry/syscall_64.c:61 arch/x86/entry/syscall_64.c:84)
[   19.104887][  T876]  ? exc_page_fault (arch/x86/mm/fault.c:1489 (discriminator 3) arch/x86/mm/fault.c:1536 (discriminator 3))
[   19.104889][  T876]  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
[   19.104891][  T876] RIP: 0033:0x7f462d2211b8
[   19.104893][  T876] Code: Unable to access opcode bytes at 0x7f462d22118e.

Code starting with the faulting instruction
===========================================
[   19.104894][  T876] RSP: 002b:00007ffe7e7b1a98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   19.104897][  T876] RAX: ffffffffffffffda RBX: 00007f462d351f88 RCX: 00007f462d2211b8
[   19.104899][  T876] RDX: 00007f462d131dc8 RSI: fffffffffffffc30 RDI: 0000000000000000
[   19.104900][  T876] RBP: 00007ffe7e7b1af0 R08: 0000000000000000 R09: 0000000000000030
[   19.104900][  T876] R10: 00007ffe7e7b18f0 R11: 0000000000000246 R12: 0000000000000002


Finger prints:
__kmalloc_noprof:put_chars:hvc_console_print:console_emit_next_record:console_flush_one_record