diff options
Diffstat (limited to 'arch/arm/mm/kasan_init.c')
| -rw-r--r-- | arch/arm/mm/kasan_init.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c index 5ad0d6c56d56..46d9f4a622cb 100644 --- a/arch/arm/mm/kasan_init.c +++ b/arch/arm/mm/kasan_init.c @@ -236,7 +236,11 @@ void __init kasan_init(void) clear_pgds(KASAN_SHADOW_START, KASAN_SHADOW_END); - kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_START), + if (!IS_ENABLED(CONFIG_KASAN_VMALLOC)) + kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_START), + kasan_mem_to_shadow((void *)VMALLOC_END)); + + kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_END), kasan_mem_to_shadow((void *)-1UL) + 1); for_each_mem_range(i, &pa_start, &pa_end) { @@ -264,12 +268,17 @@ void __init kasan_init(void) /* * 1. The module global variables are in MODULES_VADDR ~ MODULES_END, - * so we need to map this area. + * so we need to map this area if CONFIG_KASAN_VMALLOC=n. With + * VMALLOC support KASAN will manage this region dynamically, + * refer to kasan_populate_vmalloc() and ARM's implementation of + * module_alloc(). * 2. PKMAP_BASE ~ PKMAP_BASE+PMD_SIZE's shadow and MODULES_VADDR * ~ MODULES_END's shadow is in the same PMD_SIZE, so we can't * use kasan_populate_zero_shadow. */ - create_mapping((void *)MODULES_VADDR, (void *)(PKMAP_BASE + PMD_SIZE)); + if (!IS_ENABLED(CONFIG_KASAN_VMALLOC) && IS_ENABLED(CONFIG_MODULES)) + create_mapping((void *)MODULES_VADDR, (void *)(MODULES_END)); + create_mapping((void *)PKMAP_BASE, (void *)(PKMAP_BASE + PMD_SIZE)); /* * KAsan may reuse the contents of kasan_early_shadow_pte directly, so |