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Subject[PATCH -next 2/5] mm/kmemleak: skip update_checksum for OBJECT_NO_SCAN objects
Date
From: Wei Yongjun <weiyongjun1@huawei.com>

Objects marked with OBJECT_NO_SCAN are never scanned.
So there is no need to update checksum for them.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
---
mm/kmemleak.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index b3f603fd9fc3..c09c6b59eda6 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1166,6 +1166,10 @@ static bool update_checksum(struct kmemleak_object *object)
{
u32 old_csum = object->checksum;

+ /* always return false for not scan object */
+ if (object->flags & OBJECT_NO_SCAN)
+ return false;
+
kasan_disable_current();
kcsan_disable_current();
object->checksum = crc32(0, (void *)object->pointer, object->size);
--
2.25.0
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