linux-kernel - [PATCH v2 1/2] kasan: free allocated shadow memory on MEM_CANCEL

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Message-Id: <20180522100756.18478-2-david@redhat.com>
Date:   Tue, 22 May 2018 12:07:55 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, David Hildenbrand <david@...hat.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        kasan-dev@...glegroups.com (open list:KASAN)
Subject: [PATCH v2 1/2] kasan: free allocated shadow memory on MEM_CANCEL_ONLINE

We have to free memory again when we cancel onlining, otherwise a later
onlining attempt will fail.

Signed-off-by: David Hildenbrand <david@...hat.com>
---
 mm/kasan/kasan.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c
index 135ce2838c89..53564229674b 100644
--- a/mm/kasan/kasan.c
+++ b/mm/kasan/kasan.c
@@ -867,6 +867,7 @@ 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;
 
-- 
2.17.0