Messages in this thread Patch in this message | | | From | Kuan-Ying Lee <> | Subject | [PATCH 1/1] kasan: fix memory leak of kasan quarantine | Date | Tue, 15 Dec 2020 19:28:03 +0800 |
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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.
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: Andrew Morton <akpm@linux-foundation.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: <stable@vger.kernel.org> [5.10-] --- mm/kasan/quarantine.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c index 0e3f8494628f..cac7c617df72 100644 --- a/mm/kasan/quarantine.c +++ b/mm/kasan/quarantine.c @@ -191,6 +191,7 @@ void quarantine_put(struct kasan_free_meta *info, struct kmem_cache *cache) q = this_cpu_ptr(&cpu_quarantine); if (q->offline) { + qlink_free(&info->quarantine_link, cache); local_irq_restore(flags); return; } -- 2.18.0
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