| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20250812130933.71593-5-bhe@redhat.com>
Date: Tue, 12 Aug 2025 21:09:33 +0800
From: Baoquan He <bhe@...hat.com>
To: linux-mm@...ck.org
Cc: snovitoll@...il.com,
ryabinin.a.a@...il.com,
christophe.leroy@...roup.eu,
hca@...ux.ibm.com,
andreyknvl@...il.com,
akpm@...ux-foundation.org,
chenhuacai@...ngson.cn,
davidgow@...gle.com,
glider@...gle.com,
dvyukov@...gle.com,
alexghiti@...osinc.com,
kasan-dev@...glegroups.com,
loongarch@...ts.linux.dev,
linuxppc-dev@...ts.ozlabs.org,
linux-um@...ts.infradead.org,
linux-kernel@...r.kernel.org,
agordeev@...ux.ibm.com,
Baoquan He <bhe@...hat.com>
Subject: [PATCH 4/4] mm/kasan: remove kasan_arch_is_ready()
Now there's no any place where kasan_arch_is_ready() is needed, remove
all its invocations.
Signed-off-by: Baoquan He <bhe@...hat.com>
---
mm/kasan/common.c | 9 +++------
mm/kasan/generic.c | 9 ---------
mm/kasan/kasan.h | 6 ------
mm/kasan/shadow.c | 18 ------------------
4 files changed, 3 insertions(+), 39 deletions(-)
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 69a848f2a8aa..e48c1fd60edf 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -271,7 +271,7 @@ static inline void poison_slab_object(struct kmem_cache *cache, void *object,
bool __kasan_slab_pre_free(struct kmem_cache *cache, void *object,
unsigned long ip)
{
- if (!kasan_arch_is_ready() || is_kfence_address(object))
+ if (is_kfence_address(object))
return false;
return check_slab_allocation(cache, object, ip);
}
@@ -279,7 +279,7 @@ bool __kasan_slab_pre_free(struct kmem_cache *cache, void *object,
bool __kasan_slab_free(struct kmem_cache *cache, void *object, bool init,
bool still_accessible)
{
- if (!kasan_arch_is_ready() || is_kfence_address(object))
+ if (is_kfence_address(object))
return false;
/*
@@ -318,9 +318,6 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *object, bool init,
static inline bool check_page_allocation(void *ptr, unsigned long ip)
{
- if (!kasan_arch_is_ready())
- return false;
-
if (ptr != page_address(virt_to_head_page(ptr))) {
kasan_report_invalid_free(ptr, ip, KASAN_REPORT_INVALID_FREE);
return true;
@@ -547,7 +544,7 @@ bool __kasan_mempool_poison_object(void *ptr, unsigned long ip)
return true;
}
- if (is_kfence_address(ptr) || !kasan_arch_is_ready())
+ if (is_kfence_address(ptr))
return true;
slab = folio_slab(folio);
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c
index 8daea5892754..d513e3e2e136 100644
--- a/mm/kasan/generic.c
+++ b/mm/kasan/generic.c
@@ -168,9 +168,6 @@ static __always_inline bool check_region_inline(const void *addr,
if (!kasan_enabled())
return true;
- if (!kasan_arch_is_ready())
- return true;
-
if (unlikely(size == 0))
return true;
@@ -196,9 +193,6 @@ bool kasan_byte_accessible(const void *addr)
{
s8 shadow_byte;
- if (!kasan_arch_is_ready())
- return true;
-
shadow_byte = READ_ONCE(*(s8 *)kasan_mem_to_shadow(addr));
return shadow_byte >= 0 && shadow_byte < KASAN_GRANULE_SIZE;
@@ -505,9 +499,6 @@ static void release_alloc_meta(struct kasan_alloc_meta *meta)
static void release_free_meta(const void *object, struct kasan_free_meta *meta)
{
- if (!kasan_arch_is_ready())
- return;
-
/* Check if free meta is valid. */
if (*(u8 *)kasan_mem_to_shadow(object) != KASAN_SLAB_FREE_META)
return;
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 129178be5e64..e0ffc16495d7 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -544,12 +544,6 @@ static inline void kasan_poison_last_granule(const void *address, size_t size) {
#endif /* CONFIG_KASAN_GENERIC */
-#ifndef kasan_arch_is_ready
-static inline bool kasan_arch_is_ready(void) { return true; }
-#elif !defined(CONFIG_KASAN_GENERIC) || !defined(CONFIG_KASAN_OUTLINE)
-#error kasan_arch_is_ready only works in KASAN generic outline mode!
-#endif
-
#if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
void kasan_kunit_test_suite_start(void);
diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c
index 637f2d02d2a3..d8b975282b22 100644
--- a/mm/kasan/shadow.c
+++ b/mm/kasan/shadow.c
@@ -128,9 +128,6 @@ void kasan_poison(const void *addr, size_t size, u8 value, bool init)
if (!kasan_enabled())
return;
- if (!kasan_arch_is_ready())
- return;
-
/*
* Perform shadow offset calculation based on untagged address, as
* some of the callers (e.g. kasan_poison_new_object) pass tagged
@@ -156,9 +153,6 @@ void kasan_poison_last_granule(const void *addr, size_t size)
if (!kasan_enabled())
return;
- if (!kasan_arch_is_ready())
- return;
-
if (size & KASAN_GRANULE_MASK) {
u8 *shadow = (u8 *)kasan_mem_to_shadow(addr + size);
*shadow = size & KASAN_GRANULE_MASK;
@@ -402,9 +396,6 @@ int kasan_populate_vmalloc(unsigned long addr, unsigned long size)
if (!kasan_enabled())
return 0;
- if (!kasan_arch_is_ready())
- return 0;
-
if (!is_vmalloc_or_module_addr((void *)addr))
return 0;
@@ -575,9 +566,6 @@ void kasan_release_vmalloc(unsigned long start, unsigned long end,
if (!kasan_enabled())
return;
- if (!kasan_arch_is_ready())
- return;
-
region_start = ALIGN(start, KASAN_MEMORY_PER_SHADOW_PAGE);
region_end = ALIGN_DOWN(end, KASAN_MEMORY_PER_SHADOW_PAGE);
@@ -626,9 +614,6 @@ void *__kasan_unpoison_vmalloc(const void *start, unsigned long size,
* with setting memory tags, so the KASAN_VMALLOC_INIT flag is ignored.
*/
- if (!kasan_arch_is_ready())
- return (void *)start;
-
if (!is_vmalloc_or_module_addr(start))
return (void *)start;
@@ -651,9 +636,6 @@ void *__kasan_unpoison_vmalloc(const void *start, unsigned long size,
*/
void __kasan_poison_vmalloc(const void *start, unsigned long size)
{
- if (!kasan_arch_is_ready())
- return;
-
if (!is_vmalloc_or_module_addr(start))
return;
--
2.41.0
Powered by blists - more mailing lists