[patch 16/16] kasan: fix memory hotplug during boot

[patch 16/16] kasan: fix memory hotplug during boot

[akpm]

From: David Hildenbrand <david@redhat.com>
Subject: kasan: fix memory hotplug during boot

Using module_init() is wrong.  E.g.  ACPI adds and onlines memory before
our memory notifier gets registered.

This makes sure that ACPI memory detected during boot up will not result
in a kernel crash.

Easily reproducible with QEMU, just specify a DIMM when starting up.

Link: http://lkml.kernel.org/r/20180522100756.18478-3-david@redhat.com
Fixes: 786a8959912e ("kasan: disable memory hotplug")
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kasan/kasan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/kasan/kasan.c~kasan-fix-memory-hotplug-during-boot mm/kasan/kasan.c
--- a/mm/kasan/kasan.c~kasan-fix-memory-hotplug-during-boot
+++ a/mm/kasan/kasan.c
@@ -898,5 +898,5 @@ static int __init kasan_memhotplug_init(
 	return 0;
 }
 
-module_init(kasan_memhotplug_init);
+core_initcall(kasan_memhotplug_init);
 #endif
_