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| author | Kees Cook <keescook@chromium.org> | 2017-01-13 11:14:39 -0800 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2017-01-18 12:02:35 -0800 |
| commit | c61f13eaa1ee17728c41370100d2d45c254ce76f (patch) | |
| tree | 63ae636a8d3bfc405b8a0a108ab17c24c5790fd8 /arch/Kconfig | |
| parent | 8d4973a1c01d4b38871fbc6631e1fdd20e6c9e90 (diff) | |
| download | lwn-c61f13eaa1ee17728c41370100d2d45c254ce76f.tar.gz lwn-c61f13eaa1ee17728c41370100d2d45c254ce76f.zip | |
gcc-plugins: Add structleak for more stack initialization
This plugin detects any structures that contain __user attributes and
makes sure it is being fully initialized so that a specific class of
information exposure is eliminated. (This plugin was originally designed
to block the exposure of siginfo in CVE-2013-2141.)
Ported from grsecurity/PaX. This version adds a verbose option to the
plugin and the Kconfig.
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 99839c23d453..646ba0f42c5f 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -410,6 +410,28 @@ config GCC_PLUGIN_LATENT_ENTROPY * https://grsecurity.net/ * https://pax.grsecurity.net/ +config GCC_PLUGIN_STRUCTLEAK + bool "Force initialization of variables containing userspace addresses" + depends on GCC_PLUGINS + help + This plugin zero-initializes any structures that containing a + __user attribute. This can prevent some classes of information + exposures. + + This plugin was ported from grsecurity/PaX. More information at: + * https://grsecurity.net/ + * https://pax.grsecurity.net/ + +config GCC_PLUGIN_STRUCTLEAK_VERBOSE + bool "Report forcefully initialized variables" + depends on GCC_PLUGIN_STRUCTLEAK + depends on !COMPILE_TEST + help + This option will cause a warning to be printed each time the + structleak plugin finds a variable it thinks needs to be + initialized. Since not all existing initializers are detected + by the plugin, this can produce false positive warnings. + config HAVE_CC_STACKPROTECTOR bool help |