[to-be-updated] kasan-add-memzero-init-for-unaligned-size-under-slub-debug.patch removed from -mm tree

[to-be-updated] kasan-add-memzero-init-for-unaligned-size-under-slub-debug.patch removed from -mm tree

[akpm]

The patch titled
     Subject: kasan: add memzero init for unaligned size under SLUB debug
has been removed from the -mm tree.  Its filename was
     kasan-add-memzero-init-for-unaligned-size-under-slub-debug.patch

This patch was dropped because an updated version will be merged

------------------------------------------------------
From: Yee Lee <yee.lee@mediatek.com>
Subject: kasan: add memzero init for unaligned size under SLUB debug

Issue: when SLUB debug is on, hwtag kasan_unpoison() would overwrite the
redzone of object with unaligned size.

An additional memzero_explicit() path is added to replacing init by hwtag
instruction for those unaligned size at SLUB debug mode.

Link: https://lkml.kernel.org/r/20210624112624.31215-2-yee.lee@mediatek.com
Signed-off-by: Yee Lee <yee.lee@mediatek.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/kasan/kasan.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/mm/kasan/kasan.h~kasan-add-memzero-init-for-unaligned-size-under-slub-debug
+++ a/mm/kasan/kasan.h
@@ -387,6 +387,12 @@ static inline void kasan_unpoison(const
 
 	if (WARN_ON((unsigned long)addr & KASAN_GRANULE_MASK))
 		return;
+#if IS_ENABLED(CONFIG_SLUB_DEBUG)
+	if (init && ((unsigned long)size & KASAN_GRANULE_MASK)) {
+		init = false;
+		memzero_explicit((void *)addr, size);
+	}
+#endif
 	size = round_up(size, KASAN_GRANULE_SIZE);
 
 	hw_set_mem_tag_range((void *)addr, size, tag, init);
_

Patches currently in -mm which might be from yee.lee@mediatek.com are