On Tue, 2020-12-22 at 11:04 -0800, akpm@linux-foundation.org wrote:
The patch titled Subject: kasan: fix memory leak of kasan quarantine has been removed from the -mm tree. Its filename was kasan-fix-memory-leak-of-kasan-quarantine.patch
This patch was dropped because an updated version will be merged
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@me... 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 @@ -194,6 +194,7 @@ bool quarantine_put(struct kmem_cache *c q = this_cpu_ptr(&cpu_quarantine); if (q->offline) {
qlink_free(&info->quarantine_link, cache);_
Patches currently in -mm which might be from Kuan-Ying.Lee@mediatek.com are
Hi Andrew,
Sorry to bother. After recently kasan series merged into mainline, the memory leak issue has been fixed. We don't need this patch anymore.
This patch state can be changed to obsolete.
Please abandon this patch.
Thanks.