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 _