From 70fb50176ed6cd462c373d765e93f27be6a3a6ee Mon Sep 17 00:00:00 2001
From: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Date: Fri, 13 Aug 2021 16:54:27 -0700
Subject: [PATCH] UPSTREAM: kasan, slub: reset tag when printing address

The address still includes the tags when it is printed.  With hardware
tag-based kasan enabled, we will get a false positive KASAN issue when
we access metadata.

Reset the tag before we access the metadata.

Link: https://lkml.kernel.org/r/20210804090957.12393-3-Kuan-Ying.Lee@mediatek.com
Fixes: aa1ef4d7b3f6 ("kasan, mm: reset tags when accessing metadata")
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: Nicholas Tang <nicholas.tang@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Bug: 197723947
(cherry picked from commit 340caf178ddc2efb0294afaf54c715f7928c258e)
Change-Id: If721a44e7bb022fea317dfafb5252b13055eac7d
Signed-off-by: Yee Lee <yee.lee@mediatek.com>