The patch titled
Subject: kasan, mm: check kasan_enabled in annotations
has been added to the -mm tree. Its filename is
kasan-mm-check-kasan_enabled-in-annotations.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/kasan-mm-check-kasan_enabled-in-annotations.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/kasan-mm-check-kasan_enabled-in-annotations.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan, mm: check kasan_enabled in annotations
Declare the kasan_enabled static key in include/linux/kasan.h and in
include/linux/mm.h and check it in all kasan annotations. This allows to
avoid any slowdown caused by function calls when kasan_enabled is
disabled.
Link: https://lkml.kernel.org/r/22c1a837d4d0c0b241a700c88f180f5e831a1953.1605046662.git.andreyknvl@xxxxxxxxxx
Link: https://linux-review.googlesource.com/id/I2589451d3c96c97abbcbf714baabe6161c6f153e
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Branislav Rankov <Branislav.Rankov@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Evgenii Stepanov <eugenis@xxxxxxxxxx>
Cc: Kevin Brodsky <kevin.brodsky@xxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/kasan.h | 224 ++++++++++++++++++++++++++++++----------
include/linux/mm.h | 22 ++-
mm/kasan/common.c | 60 +++++-----
3 files changed, 218 insertions(+), 88 deletions(-)
--- a/include/linux/kasan.h~kasan-mm-check-kasan_enabled-in-annotations
+++ a/include/linux/kasan.h
@@ -2,6 +2,7 @@
#ifndef _LINUX_KASAN_H
#define _LINUX_KASAN_H
+#include <linux/jump_label.h>
#include <linux/types.h>
struct kmem_cache;
@@ -74,56 +75,179 @@ static inline void kasan_disable_current
#ifdef CONFIG_KASAN
-void kasan_alloc_pages(struct page *page, unsigned int order);
-void kasan_free_pages(struct page *page, unsigned int order);
-
-void kasan_cache_create(struct kmem_cache *cache, unsigned int *size,
- slab_flags_t *flags);
-
-void kasan_unpoison_data(const void *address, size_t size);
-void kasan_unpoison_slab(const void *ptr);
-
-void kasan_poison_slab(struct page *page);
-void kasan_unpoison_object_data(struct kmem_cache *cache, void *object);
-void kasan_poison_object_data(struct kmem_cache *cache, void *object);
-void * __must_check kasan_init_slab_obj(struct kmem_cache *cache,
- const void *object);
-
-void * __must_check kasan_kmalloc_large(const void *ptr, size_t size,
- gfp_t flags);
-void kasan_kfree_large(void *ptr, unsigned long ip);
-void kasan_poison_kfree(void *ptr, unsigned long ip);
-void * __must_check kasan_kmalloc(struct kmem_cache *s, const void *object,
- size_t size, gfp_t flags);
-void * __must_check kasan_krealloc(const void *object, size_t new_size,
- gfp_t flags);
-
-void * __must_check kasan_slab_alloc(struct kmem_cache *s, void *object,
- gfp_t flags);
-bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip);
-
struct kasan_cache {
int alloc_meta_offset;
int free_meta_offset;
};
-size_t kasan_metadata_size(struct kmem_cache *cache);
+#ifdef CONFIG_KASAN_HW_TAGS
+DECLARE_STATIC_KEY_FALSE(kasan_flag_enabled);
+static inline kasan_enabled(void)
+{
+ return static_branch_likely(&kasan_flag_enabled);
+}
+#else
+static inline kasan_enabled(void)
+{
+ return true;
+}
+#endif
+
+void __kasan_alloc_pages(struct page *page, unsigned int order);
+static inline void kasan_alloc_pages(struct page *page, unsigned int order)
+{
+ if (kasan_enabled())
+ __kasan_alloc_pages(page, order);
+}
+
+void __kasan_free_pages(struct page *page, unsigned int order);
+static inline void kasan_free_pages(struct page *page, unsigned int order)
+{
+ if (kasan_enabled())
+ __kasan_free_pages(page, order);
+}
+
+void __kasan_cache_create(struct kmem_cache *cache, unsigned int *size,
+ slab_flags_t *flags);
+static inline void kasan_cache_create(struct kmem_cache *cache,
+ unsigned int *size, slab_flags_t *flags)
+{
+ if (kasan_enabled())
+ __kasan_cache_create(cache, size, flags);
+}
+
+size_t __kasan_metadata_size(struct kmem_cache *cache);
+static inline size_t kasan_metadata_size(struct kmem_cache *cache)
+{
+ if (kasan_enabled())
+ return __kasan_metadata_size(cache);
+ return 0;
+}
+
+void __kasan_unpoison_data(const void *addr, size_t size);
+static inline void kasan_unpoison_data(const void *addr, size_t size)
+{
+ if (kasan_enabled())
+ __kasan_unpoison_data(addr, size);
+}
+
+void __kasan_unpoison_slab(const void *ptr);
+static inline void kasan_unpoison_slab(const void *ptr)
+{
+ if (kasan_enabled())
+ __kasan_unpoison_slab(ptr);
+}
+
+void __kasan_poison_slab(struct page *page);
+static inline void kasan_poison_slab(struct page *page)
+{
+ if (kasan_enabled())
+ return __kasan_poison_slab(page);
+}
+
+void __kasan_unpoison_object_data(struct kmem_cache *cache, void *object);
+static inline void kasan_unpoison_object_data(struct kmem_cache *cache, void *object)
+{
+ if (kasan_enabled())
+ return __kasan_unpoison_object_data(cache, object);
+}
+
+void __kasan_poison_object_data(struct kmem_cache *cache, void *object);
+static inline void kasan_poison_object_data(struct kmem_cache *cache, void *object)
+{
+ if (kasan_enabled())
+ __kasan_poison_object_data(cache, object);
+}
+
+void * __must_check __kasan_init_slab_obj(struct kmem_cache *cache,
+ const void *object);
+static inline void * __must_check kasan_init_slab_obj(struct kmem_cache *cache,
+ const void *object)
+{
+ if (kasan_enabled())
+ return __kasan_init_slab_obj(cache, object);
+ return (void *)object;
+}
+
+bool __kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip);
+static inline bool kasan_slab_free(struct kmem_cache *s, void *object, unsigned long ip)
+{
+ if (kasan_enabled())
+ return __kasan_slab_free(s, object, ip);
+ return false;
+}
+
+void * __must_check __kasan_slab_alloc(struct kmem_cache *s,
+ void *object, gfp_t flags);
+static inline void * __must_check kasan_slab_alloc(struct kmem_cache *s,
+ void *object, gfp_t flags)
+{
+ if (kasan_enabled())
+ return __kasan_slab_alloc(s, object, flags);
+ return object;
+}
+
+void * __must_check __kasan_kmalloc(struct kmem_cache *s, const void *object,
+ size_t size, gfp_t flags);
+static inline void * __must_check kasan_kmalloc(struct kmem_cache *s, const void *object,
+ size_t size, gfp_t flags)
+{
+ if (kasan_enabled())
+ return __kasan_kmalloc(s, object, size, flags);
+ return (void *)object;
+}
+
+void * __must_check __kasan_kmalloc_large(const void *ptr,
+ size_t size, gfp_t flags);
+static inline void * __must_check kasan_kmalloc_large(const void *ptr,
+ size_t size, gfp_t flags)
+{
+ if (kasan_enabled())
+ return __kasan_kmalloc_large(ptr, size, flags);
+ return (void *)ptr;
+}
+
+void * __must_check __kasan_krealloc(const void *object,
+ size_t new_size, gfp_t flags);
+static inline void * __must_check kasan_krealloc(const void *object,
+ size_t new_size, gfp_t flags)
+{
+ if (kasan_enabled())
+ return __kasan_krealloc(object, new_size, flags);
+ return (void *)object;
+}
+
+void __kasan_poison_kfree(void *ptr, unsigned long ip);
+static inline void kasan_poison_kfree(void *ptr, unsigned long ip)
+{
+ if (kasan_enabled())
+ __kasan_poison_kfree(ptr, ip);
+}
+
+void __kasan_kfree_large(void *ptr, unsigned long ip);
+static inline void kasan_kfree_large(void *ptr, unsigned long ip)
+{
+ if (kasan_enabled())
+ __kasan_kfree_large(ptr, ip);
+}
bool kasan_save_enable_multi_shot(void);
void kasan_restore_multi_shot(bool enabled);
#else /* CONFIG_KASAN */
+static inline kasan_enabled(void)
+{
+ return false;
+}
static inline void kasan_alloc_pages(struct page *page, unsigned int order) {}
static inline void kasan_free_pages(struct page *page, unsigned int order) {}
-
static inline void kasan_cache_create(struct kmem_cache *cache,
unsigned int *size,
slab_flags_t *flags) {}
-
-static inline void kasan_unpoison_data(const void *address, size_t size) { }
-static inline void kasan_unpoison_slab(const void *ptr) { }
-
+static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; }
+static inline void kasan_unpoison_data(const void *address, size_t size) {}
+static inline void kasan_unpoison_slab(const void *ptr) {}
static inline void kasan_poison_slab(struct page *page) {}
static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
void *object) {}
@@ -134,36 +258,32 @@ static inline void *kasan_init_slab_obj(
{
return (void *)object;
}
-
-static inline void *kasan_kmalloc_large(void *ptr, size_t size, gfp_t flags)
+static inline bool kasan_slab_free(struct kmem_cache *s, void *object,
+ unsigned long ip)
{
- return ptr;
+ return false;
+}
+static inline void *kasan_slab_alloc(struct kmem_cache *s, void *object,
+ gfp_t flags)
+{
+ return object;
}
-static inline void kasan_kfree_large(void *ptr, unsigned long ip) {}
-static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {}
static inline void *kasan_kmalloc(struct kmem_cache *s, const void *object,
size_t size, gfp_t flags)
{
return (void *)object;
}
+static inline void *kasan_kmalloc_large(const void *ptr, size_t size, gfp_t flags)
+{
+ return (void *)ptr;
+}
static inline void *kasan_krealloc(const void *object, size_t new_size,
gfp_t flags)
{
return (void *)object;
}
-
-static inline void *kasan_slab_alloc(struct kmem_cache *s, void *object,
- gfp_t flags)
-{
- return object;
-}
-static inline bool kasan_slab_free(struct kmem_cache *s, void *object,
- unsigned long ip)
-{
- return false;
-}
-
-static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; }
+static inline void kasan_poison_kfree(void *ptr, unsigned long ip) {}
+static inline void kasan_kfree_large(void *ptr, unsigned long ip) {}
#endif /* CONFIG_KASAN */
--- a/include/linux/mm.h~kasan-mm-check-kasan_enabled-in-annotations
+++ a/include/linux/mm.h
@@ -31,6 +31,7 @@
#include <linux/sizes.h>
#include <linux/sched.h>
#include <linux/pgtable.h>
+#include <linux/kasan.h>
struct mempolicy;
struct anon_vma;
@@ -1415,22 +1416,30 @@ static inline bool cpupid_match_pid(stru
#endif /* CONFIG_NUMA_BALANCING */
#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
+
static inline u8 page_kasan_tag(const struct page *page)
{
- return (page->flags >> KASAN_TAG_PGSHIFT) & KASAN_TAG_MASK;
+ if (kasan_enabled())
+ return (page->flags >> KASAN_TAG_PGSHIFT) & KASAN_TAG_MASK;
+ return 0xff;
}
static inline void page_kasan_tag_set(struct page *page, u8 tag)
{
- page->flags &= ~(KASAN_TAG_MASK << KASAN_TAG_PGSHIFT);
- page->flags |= (tag & KASAN_TAG_MASK) << KASAN_TAG_PGSHIFT;
+ if (kasan_enabled()) {
+ page->flags &= ~(KASAN_TAG_MASK << KASAN_TAG_PGSHIFT);
+ page->flags |= (tag & KASAN_TAG_MASK) << KASAN_TAG_PGSHIFT;
+ }
}
static inline void page_kasan_tag_reset(struct page *page)
{
- page_kasan_tag_set(page, 0xff);
+ if (kasan_enabled())
+ page_kasan_tag_set(page, 0xff);
}
-#else
+
+#else /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */
+
static inline u8 page_kasan_tag(const struct page *page)
{
return 0xff;
@@ -1438,7 +1447,8 @@ static inline u8 page_kasan_tag(const st
static inline void page_kasan_tag_set(struct page *page, u8 tag) { }
static inline void page_kasan_tag_reset(struct page *page) { }
-#endif
+
+#endif /* CONFIG_KASAN_SW_TAGS || CONFIG_KASAN_HW_TAGS */
static inline struct zone *page_zone(const struct page *page)
{
--- a/mm/kasan/common.c~kasan-mm-check-kasan_enabled-in-annotations
+++ a/mm/kasan/common.c
@@ -82,7 +82,7 @@ asmlinkage void kasan_unpoison_task_stac
}
#endif /* CONFIG_KASAN_STACK */
-void kasan_alloc_pages(struct page *page, unsigned int order)
+void __kasan_alloc_pages(struct page *page, unsigned int order)
{
u8 tag;
unsigned long i;
@@ -96,7 +96,7 @@ void kasan_alloc_pages(struct page *page
kasan_unpoison_memory(page_address(page), PAGE_SIZE << order);
}
-void kasan_free_pages(struct page *page, unsigned int order)
+void __kasan_free_pages(struct page *page, unsigned int order)
{
if (likely(!PageHighMem(page)))
kasan_poison_memory(page_address(page),
@@ -123,8 +123,8 @@ static inline unsigned int optimal_redzo
object_size <= (1 << 16) - 1024 ? 1024 : 2048;
}
-void kasan_cache_create(struct kmem_cache *cache, unsigned int *size,
- slab_flags_t *flags)
+void __kasan_cache_create(struct kmem_cache *cache, unsigned int *size,
+ slab_flags_t *flags)
{
unsigned int orig_size = *size;
unsigned int redzone_size;
@@ -169,7 +169,7 @@ void kasan_cache_create(struct kmem_cach
*flags |= SLAB_KASAN;
}
-size_t kasan_metadata_size(struct kmem_cache *cache)
+size_t __kasan_metadata_size(struct kmem_cache *cache)
{
if (!kasan_stack_collection_enabled())
return 0;
@@ -192,17 +192,17 @@ struct kasan_free_meta *kasan_get_free_m
return kasan_reset_tag(object) + cache->kasan_info.free_meta_offset;
}
-void kasan_unpoison_data(const void *address, size_t size)
+void __kasan_unpoison_data(const void *addr, size_t size)
{
- kasan_unpoison_memory(address, size);
+ kasan_unpoison_memory(addr, size);
}
-void kasan_unpoison_slab(const void *ptr)
+void __kasan_unpoison_slab(const void *ptr)
{
kasan_unpoison_memory(ptr, __ksize(ptr));
}
-void kasan_poison_slab(struct page *page)
+void __kasan_poison_slab(struct page *page)
{
unsigned long i;
@@ -212,12 +212,12 @@ void kasan_poison_slab(struct page *page
KASAN_KMALLOC_REDZONE);
}
-void kasan_unpoison_object_data(struct kmem_cache *cache, void *object)
+void __kasan_unpoison_object_data(struct kmem_cache *cache, void *object)
{
kasan_unpoison_memory(object, cache->object_size);
}
-void kasan_poison_object_data(struct kmem_cache *cache, void *object)
+void __kasan_poison_object_data(struct kmem_cache *cache, void *object)
{
kasan_poison_memory(object,
round_up(cache->object_size, KASAN_GRANULE_SIZE),
@@ -270,7 +270,7 @@ static u8 assign_tag(struct kmem_cache *
#endif
}
-void * __must_check kasan_init_slab_obj(struct kmem_cache *cache,
+void * __must_check __kasan_init_slab_obj(struct kmem_cache *cache,
const void *object)
{
struct kasan_alloc_meta *alloc_meta;
@@ -289,7 +289,7 @@ void * __must_check kasan_init_slab_obj(
return (void *)object;
}
-static bool __kasan_slab_free(struct kmem_cache *cache, void *object,
+static bool ____kasan_slab_free(struct kmem_cache *cache, void *object,
unsigned long ip, bool quarantine)
{
u8 tag;
@@ -335,9 +335,9 @@ static bool __kasan_slab_free(struct kme
return IS_ENABLED(CONFIG_KASAN_GENERIC);
}
-bool kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip)
+bool __kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip)
{
- return __kasan_slab_free(cache, object, ip, true);
+ return ____kasan_slab_free(cache, object, ip, true);
}
static void set_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags)
@@ -345,7 +345,7 @@ static void set_alloc_info(struct kmem_c
kasan_set_track(&kasan_get_alloc_meta(cache, object)->alloc_track, flags);
}
-static void *__kasan_kmalloc(struct kmem_cache *cache, const void *object,
+static void *____kasan_kmalloc(struct kmem_cache *cache, const void *object,
size_t size, gfp_t flags, bool keep_tag)
{
unsigned long redzone_start;
@@ -380,20 +380,20 @@ static void *__kasan_kmalloc(struct kmem
return set_tag(object, tag);
}
-void * __must_check kasan_slab_alloc(struct kmem_cache *cache, void *object,
- gfp_t flags)
+void * __must_check __kasan_slab_alloc(struct kmem_cache *cache,
+ void *object, gfp_t flags)
{
- return __kasan_kmalloc(cache, object, cache->object_size, flags, false);
+ return ____kasan_kmalloc(cache, object, cache->object_size, flags, false);
}
-void * __must_check kasan_kmalloc(struct kmem_cache *cache, const void *object,
- size_t size, gfp_t flags)
+void * __must_check __kasan_kmalloc(struct kmem_cache *cache, const void *object,
+ size_t size, gfp_t flags)
{
- return __kasan_kmalloc(cache, object, size, flags, true);
+ return ____kasan_kmalloc(cache, object, size, flags, true);
}
-EXPORT_SYMBOL(kasan_kmalloc);
+EXPORT_SYMBOL(__kasan_kmalloc);
-void * __must_check kasan_kmalloc_large(const void *ptr, size_t size,
+void * __must_check __kasan_kmalloc_large(const void *ptr, size_t size,
gfp_t flags)
{
struct page *page;
@@ -418,7 +418,7 @@ void * __must_check kasan_kmalloc_large(
return (void *)ptr;
}
-void * __must_check kasan_krealloc(const void *object, size_t size, gfp_t flags)
+void * __must_check __kasan_krealloc(const void *object, size_t size, gfp_t flags)
{
struct page *page;
@@ -428,13 +428,13 @@ void * __must_check kasan_krealloc(const
page = virt_to_head_page(object);
if (unlikely(!PageSlab(page)))
- return kasan_kmalloc_large(object, size, flags);
+ return __kasan_kmalloc_large(object, size, flags);
else
- return __kasan_kmalloc(page->slab_cache, object, size,
+ return ____kasan_kmalloc(page->slab_cache, object, size,
flags, true);
}
-void kasan_poison_kfree(void *ptr, unsigned long ip)
+void __kasan_poison_kfree(void *ptr, unsigned long ip)
{
struct page *page;
@@ -447,11 +447,11 @@ void kasan_poison_kfree(void *ptr, unsig
}
kasan_poison_memory(ptr, page_size(page), KASAN_FREE_PAGE);
} else {
- __kasan_slab_free(page->slab_cache, ptr, ip, false);
+ ____kasan_slab_free(page->slab_cache, ptr, ip, false);
}
}
-void kasan_kfree_large(void *ptr, unsigned long ip)
+void __kasan_kfree_large(void *ptr, unsigned long ip)
{
if (ptr != page_address(virt_to_head_page(ptr)))
kasan_report_invalid_free(ptr, ip);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-drop-unnecessary-gpl-text-from-comment-headers.patch
kasan-kasan_vmalloc-depends-on-kasan_generic.patch
kasan-group-vmalloc-code.patch
s390-kasan-include-asm-pageh-from-asm-kasanh.patch
kasan-shadow-declarations-only-for-software-modes.patch
kasan-rename-unpoison_shadow-to-unpoison_memory.patch
kasan-rename-kasan_shadow_-to-kasan_granule_.patch
kasan-only-build-initc-for-software-modes.patch
kasan-split-out-shadowc-from-commonc.patch
kasan-define-kasan_granule_page.patch
kasan-rename-report-and-tags-files.patch
kasan-dont-duplicate-config-dependencies.patch
kasan-hide-invalid-free-check-implementation.patch
kasan-decode-stack-frame-only-with-kasan_stack_enable.patch
kasan-arm64-only-init-shadow-for-software-modes.patch
kasan-arm64-only-use-kasan_depth-for-software-modes.patch
kasan-arm64-move-initialization-message.patch
kasan-arm64-rename-kasan_init_tags-and-mark-as-__init.patch
kasan-rename-addr_has_shadow-to-addr_has_metadata.patch
kasan-rename-print_shadow_for_address-to-print_memory_metadata.patch
kasan-kasan_non_canonical_hook-only-for-software-modes.patch
kasan-rename-shadow-layout-macros-to-meta.patch
kasan-separate-metadata_fetch_row-for-each-mode.patch
kasan-arm64-dont-allow-sw_tags-with-arm64_mte.patch
kasan-introduce-config_kasan_hw_tags.patch
arm64-kasan-align-allocations-for-hw_tags.patch
arm64-kasan-add-arch-layer-for-memory-tagging-helpers.patch
kasan-define-kasan_granule_size-for-hw_tags.patch
kasan-x86-s390-update-undef-config_kasan.patch
kasan-arm64-expand-config_kasan-checks.patch
kasan-arm64-implement-hw_tags-runtime.patch
kasan-arm64-print-report-from-tag-fault-handler.patch
kasan-mm-reset-tags-when-accessing-metadata.patch
kasan-arm64-enable-config_kasan_hw_tags.patch
kasan-add-documentation-for-hardware-tag-based-mode.patch
kasan-simplify-quarantine_put-call-site.patch
kasan-rename-get_alloc-free_info.patch
kasan-introduce-set_alloc_info.patch
kasan-arm64-unpoison-stack-only-with-config_kasan_stack.patch
kasan-allow-vmap_stack-for-hw_tags-mode.patch
kasan-remove-__kasan_unpoison_stack.patch
kasan-inline-kasan_reset_tag-for-tag-based-modes.patch
kasan-inline-random_tag-for-hw_tags.patch
kasan-inline-kasan_poison_memory-and-check_invalid_free.patch
kasan-inline-and-rename-kasan_unpoison_memory.patch
kasan-add-and-integrate-kasan-boot-parameters.patch
kasan-mm-check-kasan_enabled-in-annotations.patch
kasan-simplify-kasan_poison_kfree.patch
kasan-mm-rename-kasan_poison_kfree.patch
kasan-dont-round_up-too-much.patch
kasan-simplify-assign_tag-and-set_tag-calls.patch
kasan-clarify-comment-in-__kasan_kfree_large.patch
kasan-clean-up-metadata-allocation-and-usage.patch
kasan-mm-allow-cache-merging-with-no-metadata.patch
kasan-update-documentation.patch
