Messages in this thread Patch in this message | | | Subject | [Patch 3 of 8] Introduce a config option for stack-protector | From | Arjan van de Ven <> | Date | Fri, 17 Mar 2006 17:13:01 +0100 |
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This patch adds the config options for -fstack-protector
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
--- arch/x86_64/Kconfig | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
Index: linux-2.6.16-rc6-stack-protector/arch/x86_64/Kconfig =================================================================== --- linux-2.6.16-rc6-stack-protector.orig/arch/x86_64/Kconfig +++ linux-2.6.16-rc6-stack-protector/arch/x86_64/Kconfig @@ -462,6 +462,31 @@ config SECCOMP If unsure, say Y. Only embedded should say N here. +config STACK_PROTECTOR + bool "Enable -fstack-protector buffer overflow detection (EXPRIMENTAL)" + depends on EXPERIMENTAL + default n + help + This option turns on the -fstack-protector GCC feature that is new + in GCC version 4.1. This feature puts, at the beginning of + critical functions, a canary value on the stack just before the return + address, and validates the value just before actually returning. + Stack based buffer overflows that need to overwrite this return + address now also overwrite the canary, which gets detected. + + NOTE NOTE NOTE + At this point this requires a special, patched GCC compiler! + Do not enable this unless you are using such a compiler. + +config STACK_PROTECTOR_ALL + bool "Use stack-protector for all functions" + depends on STACK_PROTECTOR + default n + help + Normally, GCC only inserts the canary value protection for + functions that use large-ish on-stack buffers. By enabling + this option, GCC will be asked to do this for ALL functions. + source kernel/Kconfig.hz endmenu - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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