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>] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240212130116.997627-1-elver@google.com>
Date: Mon, 12 Feb 2024 14:01:09 +0100
From: Marco Elver <elver@...gle.com>
To: elver@...gle.com, Kees Cook <keescook@...omium.org>
Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org>, linux-hardening@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Dmitry Vyukov <dvyukov@...gle.com>, 
	Alexander Potapenko <glider@...gle.com>, kasan-dev@...glegroups.com, 
	Matthieu Baerts <matttbe@...nel.org>, Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH] hardening: Enable KFENCE in the hardening config

KFENCE is not a security mitigation mechanism (due to sampling), but has
the performance characteristics of unintrusive hardening techniques.
When used at scale, however, it improves overall security by allowing
kernel developers to detect heap memory-safety bugs cheaply.

Link: https://lkml.kernel.org/r/79B9A832-B3DE-4229-9D87-748B2CFB7D12@kernel.org
Cc: Matthieu Baerts <matttbe@...nel.org>
Cc: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Marco Elver <elver@...gle.com>
---
 kernel/configs/hardening.config | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/configs/hardening.config b/kernel/configs/hardening.config
index 95a400f042b1..79c865bfb116 100644
--- a/kernel/configs/hardening.config
+++ b/kernel/configs/hardening.config
@@ -46,6 +46,9 @@ CONFIG_UBSAN_BOUNDS=y
 # CONFIG_UBSAN_ALIGNMENT
 CONFIG_UBSAN_SANITIZE_ALL=y
 
+# Sampling-based heap out-of-bounds and use-after-free detection.
+CONFIG_KFENCE=y
+
 # Linked list integrity checking.
 CONFIG_LIST_HARDENED=y
 
-- 
2.43.0.687.g38aa6559b0-goog


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ