kasan: fix memory hotplug during boot
authorDavid Hildenbrand <david@redhat.com>
Fri, 25 May 2018 21:48:11 +0000 (14:48 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 26 May 2018 01:12:11 +0000 (18:12 -0700)
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>

index 721e00837f0075393f1852eb9d2fade7e9c9fa78..f185455b34065d27efa2b6a90c9dd2c1dfe92ae9 100644 (file)
@@ -898,5 +898,5 @@ static int __init kasan_memhotplug_init(void)
        return 0;