This option not exist in kernel 4.14!!! It was added with kernel 5.2

Arne

Am 2020-06-10 10:28, schrieb Michael Tremer:

Hi,

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On 9 Jun 2020, at 18:53, Peter Müller peter.mueller@ipfire.org wrote:

Quoted from https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommende...:

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# Wipe stack contents on syscall exit (reduces stale data lifetime in stack) CONFIG_GCC_PLUGIN_STACKLEAK=y

Not sure what performance penalities this introduces in real life...

Well, should we not find out before we make this generally available for all users?

-Michael

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Fixes: #12382

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

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config/kernel/kernel.config.aarch64-ipfire | 1 + config/kernel/kernel.config.armv5tel-ipfire-multi | 1 + config/kernel/kernel.config.i586-ipfire | 1 + config/kernel/kernel.config.x86_64-ipfire | 1 + 4 files changed, 4 insertions(+)

diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire index e0f2f6df8..f4240e0ae 100644 --- a/config/kernel/kernel.config.aarch64-ipfire +++ b/config/kernel/kernel.config.aarch64-ipfire @@ -256,6 +256,7 @@ CONFIG_HAVE_GCC_PLUGINS=y CONFIG_GCC_PLUGINS=y # CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y +CONFIG_GCC_PLUGIN_STACKLEAK=y CONFIG_GCC_PLUGIN_STRUCTLEAK=y CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y # CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE is not set diff --git a/config/kernel/kernel.config.armv5tel-ipfire-multi b/config/kernel/kernel.config.armv5tel-ipfire-multi index 15183300f..2bcfbdbdd 100644 --- a/config/kernel/kernel.config.armv5tel-ipfire-multi +++ b/config/kernel/kernel.config.armv5tel-ipfire-multi @@ -252,6 +252,7 @@ CONFIG_HAVE_GCC_PLUGINS=y CONFIG_GCC_PLUGINS=y # CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y +CONFIG_GCC_PLUGIN_STACKLEAK=y CONFIG_GCC_PLUGIN_STRUCTLEAK=y CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y # CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE is not set diff --git a/config/kernel/kernel.config.i586-ipfire b/config/kernel/kernel.config.i586-ipfire index 578931497..a72cde41a 100644 --- a/config/kernel/kernel.config.i586-ipfire +++ b/config/kernel/kernel.config.i586-ipfire @@ -283,6 +283,7 @@ CONFIG_HAVE_GCC_PLUGINS=y CONFIG_GCC_PLUGINS=y # CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y +CONFIG_GCC_PLUGIN_STACKLEAK=y CONFIG_GCC_PLUGIN_STRUCTLEAK=y CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y # CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE is not set diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire index 6a5fbbfe9..cd116d780 100644 --- a/config/kernel/kernel.config.x86_64-ipfire +++ b/config/kernel/kernel.config.x86_64-ipfire @@ -293,6 +293,7 @@ CONFIG_HAVE_GCC_PLUGINS=y CONFIG_GCC_PLUGINS=y # CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set CONFIG_GCC_PLUGIN_LATENT_ENTROPY=y +CONFIG_GCC_PLUGIN_STACKLEAK=y CONFIG_GCC_PLUGIN_STRUCTLEAK=y CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL=y

# CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE is not set

2.26.2