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Date: Mon, 6 Mar 2017 11:09:41 -0800
From: Kees Cook <keescook@...omium.org>
To: kernel-hardening@...ts.openwall.com
Cc: Kees Cook <keescook@...omium.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Rik van Riel <riel@...hat.com>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
Jakub Kicinski <jakub.kicinski@...ronome.com>,
Viresh Kumar <viresh.kumar@...aro.org>,
Ingo Molnar <mingo@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Dmitry Vyukov <dvyukov@...gle.com>,
Olof Johansson <olof@...om.net>,
Peter Zijlstra <peterz@...radead.org>,
Josh Poimboeuf <jpoimboe@...hat.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/6] bug: Clarify help text for BUG_ON_DATA_CORRUPTION
This expands on the Kconfig help text for CONFIG_BUG_ON_DATA_CORRUPTION.
Signed-off-by: Kees Cook <keescook@...omium.org>
---
lib/Kconfig.debug | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 97d62c2da6c2..4a73d46711fb 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1995,9 +1995,11 @@ config BUG_ON_DATA_CORRUPTION
bool "Trigger a BUG when data corruption is detected"
select DEBUG_LIST
help
- Select this option if the kernel should BUG when it encounters
- data corruption in kernel memory structures when they get checked
- for validity.
+ This option enables several inexpensive data corruption checks.
+ Most of these checks normally just WARN and try to further avoid
+ the corruption. Selecting this option upgrades these to BUGs, so
+ that a system owner can furhter configure the system for immediate
+ reboots or crash dumps.
If unsure, say N.
--
2.7.4
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