4.9-stable review patch. If anyone has any objections, please let me know.
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From: David Hildenbrand david@redhat.com
commit 3f1959721558a976aaf9c2024d5bc884e6411bf7 upstream.
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 Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- mm/kasan/kasan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/kasan/kasan.c +++ b/mm/kasan/kasan.c @@ -800,5 +800,5 @@ static int __init kasan_memhotplug_init( return 0; }
-module_init(kasan_memhotplug_init); +core_initcall(kasan_memhotplug_init); #endif