Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751756AbdLAVhJ (ORCPT ); Fri, 1 Dec 2017 16:37:09 -0500 Received: from mail-io0-f196.google.com ([209.85.223.196]:38520 "EHLO mail-io0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751686AbdLAVhF (ORCPT ); Fri, 1 Dec 2017 16:37:05 -0500 X-Google-Smtp-Source: AGs4zMY0TqCt8xRcwMhKf0WVWDbym8+mfSp0MSUX9GwQu1NNOcICFjXYsl01riO4kuvR9O0SiAWjkg== From: Paul Lawrence 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 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> X-Mailer: git-send-email 2.15.0.531.g2ccb3012c9-goog In-Reply-To: <20171201213643.2506-1-paullawrence@google.com> References: <20171201213643.2506-1-paullawrence@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1206 Lines: 48 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