From 888c31fc83ddc7fcd9947cb67c5718b4e3dd5e1b Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Mon, 1 Feb 2010 19:56:33 +0000 Subject: parisc: add strict copy size checks (v2) Add CONFIG_DEBUG_STRICT_USER_COPY_CHECKS, copied from the x86 implementation. Tested with 32 and 64bit kernel. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin --- arch/parisc/Kconfig.debug | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'arch/parisc/Kconfig.debug') diff --git a/arch/parisc/Kconfig.debug b/arch/parisc/Kconfig.debug index bc989e522a04..7305ac8f7f5b 100644 --- a/arch/parisc/Kconfig.debug +++ b/arch/parisc/Kconfig.debug @@ -12,4 +12,18 @@ config DEBUG_RODATA portion of the kernel code won't be covered by a TLB anymore. If in doubt, 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 -- cgit v1.2.3-59-g8ed1b