Adds a simple test that checks if double-kzfree is being detected correctly.
Signed-off-by: Marco Elver <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Konovalov <[email protected]> Cc: Christoph Lameter <[email protected]> Cc: Pekka Enberg <[email protected]> Cc: David Rientjes <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Mark Rutland <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] --- lib/test_kasan.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index e3c593c38eff..dda5da9f5bd4 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -619,6 +619,22 @@ static noinline void __init kasan_strings(void) strnlen(ptr, 1); } +static noinline void __init kmalloc_double_kzfree(void) +{ + char *ptr; + size_t size = 16; + + pr_info("double-free (kzfree)\n"); + ptr = kmalloc(size, GFP_KERNEL); + if (!ptr) { + pr_err("Allocation failed\n"); + return; + } + + kzfree(ptr); + kzfree(ptr); +} + static int __init kmalloc_tests_init(void) { /* @@ -660,6 +676,7 @@ static int __init kmalloc_tests_init(void) kasan_memchr(); kasan_memcmp(); kasan_strings(); + kmalloc_double_kzfree(); kasan_restore_multi_shot(multishot); -- 2.22.0.410.gd8fdbe21b5-goog
