kernel: enable page poisoning on x86_64

This is already active on i586 and prevents information leaks from freed
data.

Cc: Arne Fitzenreiter <arne.fitzenreiter@ipfire.org>
Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>

diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire
index e4ad2fd3ffef0713dfffb7967da7050a60413bd9..333e9244d427fa3938cab0ac9f10086760a8ef60 100644 (file)
--- a/config/kernel/kernel.config.x86_64-ipfire
+++ b/config/kernel/kernel.config.x86_64-ipfire
@@ -6327,7 +6327,9 @@ CONFIG_DEBUG_KERNEL=y
 #
 # CONFIG_PAGE_EXTENSION is not set
 # CONFIG_DEBUG_PAGEALLOC is not set
-# CONFIG_PAGE_POISONING is not set
+CONFIG_PAGE_POISONING=y
+# CONFIG_PAGE_POISONING_NO_SANITY is not set
+CONFIG_PAGE_POISONING_ZERO=y
 # CONFIG_DEBUG_PAGE_REF is not set
 # CONFIG_DEBUG_RODATA_TEST is not set
 # CONFIG_DEBUG_OBJECTS is not set