diff options
Diffstat (limited to 'mm/kasan')
| -rw-r--r-- | mm/kasan/common.c | 3 | ||||
| -rw-r--r-- | mm/kasan/generic.c | 7 | ||||
| -rw-r--r-- | mm/kasan/shadow.c | 12 |
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; |