* [merged] kasan-slub-reset-tag-when-printing-address.patch removed from -mm tree
@ 2021-08-16 20:34 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2021-08-16 20:34 UTC (permalink / raw)
To: andreyknvl, catalin.marinas, chinwen.chang, elver, glider,
Kuan-Ying.Lee, mm-commits, nicholas.tang, ryabinin.a.a
The patch titled
Subject: kasan, slub: reset tag when printing address
has been removed from the -mm tree. Its filename was
kasan-slub-reset-tag-when-printing-address.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Subject: 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>
---
mm/slub.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/slub.c~kasan-slub-reset-tag-when-printing-address
+++ a/mm/slub.c
@@ -576,8 +576,8 @@ static void print_section(char *level, c
unsigned int length)
{
metadata_access_enable();
- print_hex_dump(level, kasan_reset_tag(text), DUMP_PREFIX_ADDRESS,
- 16, 1, addr, length, 1);
+ print_hex_dump(level, text, DUMP_PREFIX_ADDRESS,
+ 16, 1, kasan_reset_tag((void *)addr), length, 1);
metadata_access_disable();
}
_
Patches currently in -mm which might be from Kuan-Ying.Lee@mediatek.com are
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2021-08-16 20:34 [merged] kasan-slub-reset-tag-when-printing-address.patch removed from -mm tree akpm
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