+ kasan-fix-memory-leak-of-kasan-quarantine.patch added to -mm tree

+ kasan-fix-memory-leak-of-kasan-quarantine.patch added to -mm tree

[akpm]

The patch titled
     Subject: kasan: fix memory leak of kasan quarantine
has been added to the -mm tree.  Its filename is
     kasan-fix-memory-leak-of-kasan-quarantine.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/kasan-fix-memory-leak-of-kasan-quarantine.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/kasan-fix-memory-leak-of-kasan-quarantine.patch

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------------------------------------------------------
From: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Subject: kasan: fix memory leak of kasan quarantine

When cpu is going offline, set q->offline as true and interrupt happened. 
The interrupt may call the quarantine_put.  But quarantine_put do not free
the the object.  The object will cause memory leak.

Add qlink_free() to free the object.

Link: https://lkml.kernel.org/r/1608207487-30537-2-git-send-email-Kuan-Ying.Lee@mediatek.com
Fixes: 6c82d45c7f03 (kasan: fix object remaining in offline per-cpu quarantine)
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: <stable@vger.kernel.org>    [5.10-]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kasan/quarantine.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/kasan/quarantine.c~kasan-fix-memory-leak-of-kasan-quarantine
+++ a/mm/kasan/quarantine.c
@@ -191,6 +191,7 @@ void quarantine_put(struct kasan_free_me
 
 	q = this_cpu_ptr(&cpu_quarantine);
 	if (q->offline) {
+		qlink_free(&info->quarantine_link, cache);
 		local_irq_restore(flags);
 		return;
 	}
_

Patches currently in -mm which might be from Kuan-Ying.Lee@mediatek.com are

kasan-fix-memory-leak-of-kasan-quarantine.patch