Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / arch / x86 / Kconfig.debug

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 7d0b681..731318e 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -296,4 +296,18 @@ config OPTIMIZE_INLINING
 
          If unsure, say N.
 
+config DEBUG_STRICT_USER_COPY_CHECKS
+       bool "Strict copy size checks"
+       depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
+       ---help---
+         Enabling this option turns a certain set of sanity checks for user
+         copy operations into compile time failures.
+
+         The copy_from_user() etc checks are there to help test if there
+         are sufficient security checks on the length argument of
+         the copy operation, by having gcc prove that the argument is
+         within bounds.
+
+         If unsure, or if you run an older (pre 4.4) gcc, say N.
+
 endmenu