Commit 3f195972 authored May 25, 2018 by David Hildenbrand Committed by Linus Torvalds May 25, 2018

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: 786a8959 ("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>

parent ed1596f9

mm/kasan/kasan.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -898,5 +898,5 @@ static int __init kasan_memhotplug_init(void)
		return 0;
		}

		module_init(kasan_memhotplug_init);
		core_initcall(kasan_memhotplug_init);
		#endif

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