diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/test_kasan.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/lib/test_kasan.c b/lib/test_kasan.c index 82169fbf2453..48e5a0be655c 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -344,6 +344,25 @@ static noinline void __init kasan_stack_oob(void) *(volatile char *)p; } +static noinline void __init ksize_unpoisons_memory(void) +{ + char *ptr; + size_t size = 123, real_size = size; + + pr_info("ksize() unpoisons the whole allocated chunk\n"); + ptr = kmalloc(size, GFP_KERNEL); + if (!ptr) { + pr_err("Allocation failed\n"); + return; + } + real_size = ksize(ptr); + /* This access doesn't trigger an error. */ + ptr[size] = 'x'; + /* This one does. */ + ptr[real_size] = 'y'; + kfree(ptr); +} + static int __init kmalloc_tests_init(void) { kmalloc_oob_right(); @@ -367,6 +386,7 @@ static int __init kmalloc_tests_init(void) kmem_cache_oob(); kasan_stack_oob(); kasan_global_oob(); + ksize_unpoisons_memory(); return -EAGAIN; } |