From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-io0-f195.google.com ([209.85.223.195]:44775 "EHLO mail-io0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751684AbdLAVhF (ORCPT ); Fri, 1 Dec 2017 16:37:05 -0500 Received: by mail-io0-f195.google.com with SMTP id w127so12718740iow.11 for ; Fri, 01 Dec 2017 13:37:05 -0800 (PST) From: Paul Lawrence Subject: [PATCH v3 4/5] kasan: Add tests for alloca poisonong Date: Fri, 1 Dec 2017 13:36:42 -0800 Message-Id: <20171201213643.2506-5-paullawrence@google.com> In-Reply-To: <20171201213643.2506-1-paullawrence@google.com> References: <20171201213643.2506-1-paullawrence@google.com> Sender: linux-kbuild-owner@vger.kernel.org List-ID: To: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Masahiro Yamada Cc: linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kbuild@vger.kernel.org, Matthias Kaehlcke , Michael Davidson , Greg Hackmann , Paul Lawrence Signed-off-by: Greg Hackmann Signed-off-by: Paul Lawrence --- lib/test_kasan.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/lib/test_kasan.c b/lib/test_kasan.c index ef1a3ac1397e..2724f86c4cef 100644 --- a/lib/test_kasan.c +++ b/lib/test_kasan.c @@ -472,6 +472,26 @@ static noinline void __init use_after_scope_test(void) p[1023] = 1; } +static noinline void __init kasan_alloca_oob_left(void) +{ + volatile int i = 10; + char alloca_array[i]; + char *p = alloca_array - 1; + + pr_info("out-of-bounds to left on alloca\n"); + *(volatile char *)p; +} + +static noinline void __init kasan_alloca_oob_right(void) +{ + volatile int i = 10; + char alloca_array[i]; + char *p = alloca_array + i; + + pr_info("out-of-bounds to right on alloca\n"); + *(volatile char *)p; +} + static int __init kmalloc_tests_init(void) { /* @@ -502,6 +522,8 @@ static int __init kmalloc_tests_init(void) memcg_accounted_kmem_cache(); kasan_stack_oob(); kasan_global_oob(); + kasan_alloca_oob_left(); + kasan_alloca_oob_right(); ksize_unpoisons_memory(); copy_user_test(); use_after_scope_test(); -- 2.15.0.531.g2ccb3012c9-goog