The patch titled
Subject: kasan, slab: remove redundant kasan_slab_alloc hooks
has been added to the -mm tree. Its filename is
kasan-slab-remove-redundant-kasan_slab_alloc-hooks.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-slab-remove-redundant-kasan_slab_alloc-hooks.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-slab-remove-redundant-kasan_slab_alloc-hooks.patch
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The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan, slab: remove redundant kasan_slab_alloc hooks
kasan_slab_alloc() calls in kmem_cache_alloc() and kmem_cache_alloc_node()
are redundant as they are already called via
slab_alloc/slab_alloc_node()-> slab_post_alloc_hook()->kasan_slab_alloc().
Remove them.
Link: http://lkml.kernel.org/r/4ca1655cdcfc4379c49c50f7bf80f81c4ad01485.1550602886.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Tested-by: Qian Cai <cai@xxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Evgeniy Stepanov <eugenis@xxxxxxxxxx>
Cc: Kostya Serebryany <kcc@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/slab.c~kasan-slab-remove-redundant-kasan_slab_alloc-hooks
+++ a/mm/slab.c
@@ -3547,7 +3547,6 @@ void *kmem_cache_alloc(struct kmem_cache
{
void *ret = slab_alloc(cachep, flags, _RET_IP_);
- ret = kasan_slab_alloc(cachep, ret, flags);
trace_kmem_cache_alloc(_RET_IP_, ret,
cachep->object_size, cachep->size, flags);
@@ -3637,7 +3636,6 @@ void *kmem_cache_alloc_node(struct kmem_
{
void *ret = slab_alloc_node(cachep, flags, nodeid, _RET_IP_);
- ret = kasan_slab_alloc(cachep, ret, flags);
trace_kmem_cache_alloc_node(_RET_IP_, ret,
cachep->object_size, cachep->size,
flags, nodeid);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-fix-assigning-tags-twice.patch
kasan-kmemleak-pass-tagged-pointers-to-kmemleak.patch
kmemleak-account-for-tagged-pointers-when-calculating-pointer-range-v2.patch
kasan-slub-move-kasan_poison_slab-hook-before-page_address.patch
kasan-slub-move-kasan_poison_slab-hook-before-page_address-v2.patch
kasan-slub-fix-conflicts-with-config_slab_freelist_hardened.patch
kasan-slub-fix-more-conflicts-with-config_slab_freelist_hardened.patch
kasan-fix-random-seed-generation-for-tag-based-mode.patch
kasan-prevent-tracing-of-tagsc.patch
kasan-slab-fix-conflicts-with-config_hardened_usercopy.patch
kasan-slab-make-freelist-stored-without-tags.patch
kasan-slab-remove-redundant-kasan_slab_alloc-hooks.patch
