The patch titled
Subject: kasan: shadow declarations only for software modes
has been removed from the -mm tree. Its filename was
kasan-shadow-declarations-only-for-software-modes.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: shadow declarations only for software modes
This is a preparatory commit for the upcoming addition of a new hardware
tag-based (MTE-based) KASAN mode.
Group shadow-related KASAN function declarations and only define them for
the two existing software modes.
No functional changes for software modes.
Link: https://lkml.kernel.org/r/e88d94eff94db883a65dca52e1736d80d28dd9bc.1606161801.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Valdis Kletnieks <valdis.kletnieks@xxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx>
Tested-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
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: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
[valdis.kletnieks@xxxxxx: fix build issue with asmlinkage]
Link: https://lkml.kernel.org/r/35126.1606402815@turing-police
Link: https://lore.kernel.org/linux-arm-kernel/24105.1606397102@turing-police/
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/kasan.h | 48 ++++++++++++++++++++++++++--------------
1 file changed, 32 insertions(+), 16 deletions(-)
--- a/include/linux/kasan.h~kasan-shadow-declarations-only-for-software-modes
+++ a/include/linux/kasan.h
@@ -11,7 +11,7 @@ struct task_struct;
#ifdef CONFIG_KASAN
-#include <linux/pgtable.h>
+#include <linux/linkage.h>
#include <asm/kasan.h>
/* kasan_data struct is used in KUnit tests for KASAN expected failures */
@@ -20,6 +20,20 @@ struct kunit_kasan_expectation {
bool report_found;
};
+#endif
+
+#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
+
+#include <linux/pgtable.h>
+
+/* Software KASAN implementations use shadow memory. */
+
+#ifdef CONFIG_KASAN_SW_TAGS
+#define KASAN_SHADOW_INIT 0xFF
+#else
+#define KASAN_SHADOW_INIT 0
+#endif
+
extern unsigned char kasan_early_shadow_page[PAGE_SIZE];
extern pte_t kasan_early_shadow_pte[PTRS_PER_PTE];
extern pmd_t kasan_early_shadow_pmd[PTRS_PER_PMD];
@@ -35,6 +49,23 @@ static inline void *kasan_mem_to_shadow(
+ KASAN_SHADOW_OFFSET;
}
+int kasan_add_zero_shadow(void *start, unsigned long size);
+void kasan_remove_zero_shadow(void *start, unsigned long size);
+
+#else /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
+
+static inline int kasan_add_zero_shadow(void *start, unsigned long size)
+{
+ return 0;
+}
+static inline void kasan_remove_zero_shadow(void *start,
+ unsigned long size)
+{}
+
+#endif /* CONFIG_KASAN_GENERIC || CONFIG_KASAN_SW_TAGS */
+
+#ifdef CONFIG_KASAN
+
/* Enable reporting bugs after kasan_disable_current() */
extern void kasan_enable_current(void);
@@ -75,9 +106,6 @@ struct kasan_cache {
int free_meta_offset;
};
-int kasan_add_zero_shadow(void *start, unsigned long size);
-void kasan_remove_zero_shadow(void *start, unsigned long size);
-
size_t __ksize(const void *);
static inline void kasan_unpoison_slab(const void *ptr)
{
@@ -143,14 +171,6 @@ static inline bool kasan_slab_free(struc
return false;
}
-static inline int kasan_add_zero_shadow(void *start, unsigned long size)
-{
- return 0;
-}
-static inline void kasan_remove_zero_shadow(void *start,
- unsigned long size)
-{}
-
static inline void kasan_unpoison_slab(const void *ptr) { }
static inline size_t kasan_metadata_size(struct kmem_cache *cache) { return 0; }
@@ -158,8 +178,6 @@ static inline size_t kasan_metadata_size
#ifdef CONFIG_KASAN_GENERIC
-#define KASAN_SHADOW_INIT 0
-
void kasan_cache_shrink(struct kmem_cache *cache);
void kasan_cache_shutdown(struct kmem_cache *cache);
void kasan_record_aux_stack(void *ptr);
@@ -174,8 +192,6 @@ static inline void kasan_record_aux_stac
#ifdef CONFIG_KASAN_SW_TAGS
-#define KASAN_SHADOW_INIT 0xFF
-
void kasan_init_tags(void);
void *kasan_reset_tag(const void *addr);
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
