kasan: free allocated shadow memory on MEM_CANCEL_ONLINE
authorDavid Hildenbrand <david@redhat.com>
Fri, 25 May 2018 21:48:08 +0000 (14:48 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 26 May 2018 01:12:11 +0000 (18:12 -0700)
We have to free memory again when we cancel onlining, otherwise a later
onlining attempt will fail.

Link: http://lkml.kernel.org/r/20180522100756.18478-2-david@redhat.com
Fixes: fa69b5989bb0 ("mm/kasan: add support for 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>
mm/kasan/kasan.c

index 7160028efd128a3e1a24b71ad39e92ca1739a861..721e00837f0075393f1852eb9d2fade7e9c9fa78 100644 (file)
@@ -866,6 +866,7 @@ static int __meminit kasan_mem_notifier(struct notifier_block *nb,
                kmemleak_ignore(ret);
                return NOTIFY_OK;
        }
+       case MEM_CANCEL_ONLINE:
        case MEM_OFFLINE: {
                struct vm_struct *vm;