Merge branch 'mm-hotfixes-stable' into mm-stable

To pick up depended-upon changes

3 files changed, 21 insertions, 1 deletions

diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 6b8e9c848573..1e7336ae3786 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -246,6 +246,9 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *object,
 
 static inline bool ____kasan_kfree_large(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;
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c
index a37b5b57bf5c..e5eef670735e 100644
--- a/mm/kasan/generic.c
+++ b/mm/kasan/generic.c
@@ -189,7 +189,12 @@ bool kasan_check_range(unsigned long addr, size_t size, bool write,
 
 bool kasan_byte_accessible(const void *addr)
 {
-	s8 shadow_byte = READ_ONCE(*(s8 *)kasan_mem_to_shadow(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;
 }
diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c
index 2fba1f51f042..15cfb34d16a1 100644
--- a/mm/kasan/shadow.c
+++ b/mm/kasan/shadow.c
@@ -291,6 +291,9 @@ int kasan_populate_vmalloc(unsigned long addr, unsigned long size)
 	unsigned long shadow_start, shadow_end;
 	int ret;
 
+	if (!kasan_arch_is_ready())
+		return 0;
+
 	if (!is_vmalloc_or_module_addr((void *)addr))
 		return 0;
 
@@ -459,6 +462,9 @@ void kasan_release_vmalloc(unsigned long start, unsigned long end,
 	unsigned long region_start, region_end;
 	unsigned long size;
 
+	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);
 
@@ -502,6 +508,9 @@ 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;
 
@@ -524,6 +533,9 @@ 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;