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Message-Id: <1488827386-87193-5-git-send-email-keescook@chromium.org>
Date: Mon, 6 Mar 2017 11:09:44 -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 4/6] bug: Enable DEBUG_SG under BUG_ON_DATA_CORRUPTION
Similar to CONFIG_DEBUG_CREDENTIALS, CONFIG_DEBUG_SG already handles
calling BUG, and performs inexpensive checks. This enables it under
CONFIG_BUG_ON_DATA_CORRUPTION.
Signed-off-by: Kees Cook <keescook@...omium.org>
---
lib/Kconfig.debug | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 009d6f8c7e5a..42c61cfe7d19 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1267,7 +1267,7 @@ config DEBUG_PI_LIST
config DEBUG_SG
bool "Debug SG table operations"
- depends on DEBUG_KERNEL
+ depends on DEBUG_KERNEL || BUG_ON_DATA_CORRUPTION
help
Enable this to turn on checks on scatter-gather tables. This can
help find problems with drivers that do not properly initialize
@@ -1995,6 +1995,7 @@ config BUG_ON_DATA_CORRUPTION
bool "Trigger a BUG when data corruption is detected"
select DEBUG_CREDENTIALS
select DEBUG_LIST
+ select DEBUG_SG
help
This option enables several inexpensive data corruption checks.
Most of these checks normally just WARN and try to further avoid
--
2.7.4
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