The patch titled
Subject: kasan: don't round_up too much
has been removed from the -mm tree. Its filename was
kasan-dont-round_up-too-much.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: don't round_up too much
For hardware tag-based mode kasan_poison_memory() already rounds up the
size. Do the same for software modes and remove round_up() from the common
code.
Link: https://lkml.kernel.org/r/47b232474f1f89dc072aeda0fa58daa6efade377.1606162397.git.andreyknvl@xxxxxxxxxx
Link: https://linux-review.googlesource.com/id/Ib397128fac6eba874008662b4964d65352db4aa4
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Tested-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Branislav Rankov <Branislav.Rankov@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Evgenii Stepanov <eugenis@xxxxxxxxxx>
Cc: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/common.c | 8 ++------
mm/kasan/shadow.c | 1 +
2 files changed, 3 insertions(+), 6 deletions(-)
--- a/mm/kasan/common.c~kasan-dont-round_up-too-much
+++ a/mm/kasan/common.c
@@ -213,9 +213,7 @@ void __kasan_unpoison_object_data(struct
void __kasan_poison_object_data(struct kmem_cache *cache, void *object)
{
- poison_range(object,
- round_up(cache->object_size, KASAN_GRANULE_SIZE),
- KASAN_KMALLOC_REDZONE);
+ poison_range(object, cache->object_size, KASAN_KMALLOC_REDZONE);
}
/*
@@ -288,7 +286,6 @@ static bool ____kasan_slab_free(struct k
{
u8 tag;
void *tagged_object;
- unsigned long rounded_up_size;
tag = get_tag(object);
tagged_object = object;
@@ -309,8 +306,7 @@ static bool ____kasan_slab_free(struct k
return true;
}
- rounded_up_size = round_up(cache->object_size, KASAN_GRANULE_SIZE);
- poison_range(object, rounded_up_size, KASAN_KMALLOC_FREE);
+ poison_range(object, cache->object_size, KASAN_KMALLOC_FREE);
if (!kasan_stack_collection_enabled())
return false;
--- a/mm/kasan/shadow.c~kasan-dont-round_up-too-much
+++ a/mm/kasan/shadow.c
@@ -82,6 +82,7 @@ void poison_range(const void *address, s
* addresses to this function.
*/
address = kasan_reset_tag(address);
+ size = round_up(size, KASAN_GRANULE_SIZE);
shadow_start = kasan_mem_to_shadow(address);
shadow_end = kasan_mem_to_shadow(address + size);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
