[PATCH 4/6] bug: Enable DEBUG_SG under BUG_ON_DATA_CORRUPTION

From: Kees Cook
Date: Mon Mar 06 2017 - 14:10:17 EST


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@xxxxxxxxxxxx>
---
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