linux-kernel - [PATCH v2 6/7] kasan: Test fix: Warn if the UAF could not be detected in kmalloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <453a4a22affea8061edf20b64f63f4a0d6359417.1455814741.git.glider@google.com>
Date:	Thu, 18 Feb 2016 18:16:06 +0100
From:	Alexander Potapenko <glider@...gle.com>
To:	adech.fo@...il.com, cl@...ux.com, dvyukov@...gle.com,
	akpm@...ux-foundation.org, ryabinin.a.a@...il.com,
	rostedt@...dmis.org, iamjoonsoo.kim@....com, js1304@...il.com,
	kcc@...gle.com
Cc:	kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH v2 6/7] kasan: Test fix: Warn if the UAF could not be detected in kmalloc_uaf2

Signed-off-by: Alexander Potapenko <glider@...gle.com>
---
 lib/test_kasan.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 90ad74f..82169fb 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -294,6 +294,8 @@ static noinline void __init kmalloc_uaf2(void)
 	}
 
 	ptr1[40] = 'x';
+	if (ptr1 == ptr2)
+		pr_err("Could not detect use-after-free: ptr1 == ptr2\n");
 	kfree(ptr2);
 }
 
-- 
2.7.0.rc3.207.g0ac5344