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| author | Kees Cook <keescook@chromium.org> | 2022-02-06 09:20:08 -0800 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-02-06 10:49:57 -0800 |
| commit | f154066b61dfde618d98fdafc8cadde076c7f222 (patch) | |
| tree | 155f3ae606576daf61f7454a9d0fbde360de7e18 | |
| parent | 26291c54e111ff6ba87a164d85d4a4e134b7315c (diff) | |
| download | lwn-f154066b61dfde618d98fdafc8cadde076c7f222.tar.gz lwn-f154066b61dfde618d98fdafc8cadde076c7f222.zip | |
gcc-plugins/stackleak: Provide verbose mode
In order to compare instrumentation between builds, make the verbose
mode of the plugin available during the build. This is rarely needed
(behind EXPERT) and very noisy (disabled for COMPILE_TEST).
Cc: Alexander Popov <alex.popov@linux.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
| -rw-r--r-- | scripts/Makefile.gcc-plugins | 2 | ||||
| -rw-r--r-- | security/Kconfig.hardening | 10 |
2 files changed, 12 insertions, 0 deletions
diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins index 1d16ca1b78c9..f67153b260c0 100644 --- a/scripts/Makefile.gcc-plugins +++ b/scripts/Makefile.gcc-plugins @@ -37,6 +37,8 @@ gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK) \ += -fplugin-arg-stackleak_plugin-track-min-size=$(CONFIG_STACKLEAK_TRACK_MIN_SIZE) gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK) \ += -fplugin-arg-stackleak_plugin-arch=$(SRCARCH) +gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK_VERBOSE) \ + += -fplugin-arg-stackleak_plugin-verbose ifdef CONFIG_GCC_PLUGIN_STACKLEAK DISABLE_STACKLEAK_PLUGIN += -fplugin-arg-stackleak_plugin-disable endif diff --git a/security/Kconfig.hardening b/security/Kconfig.hardening index d051f8ceefdd..ded4d7c0d132 100644 --- a/security/Kconfig.hardening +++ b/security/Kconfig.hardening @@ -174,6 +174,16 @@ config GCC_PLUGIN_STACKLEAK * https://grsecurity.net/ * https://pax.grsecurity.net/ +config GCC_PLUGIN_STACKLEAK_VERBOSE + bool "Report stack depth analysis instrumentation" if EXPERT + depends on GCC_PLUGIN_STACKLEAK + depends on !COMPILE_TEST # too noisy + help + This option will cause a warning to be printed each time the + stackleak plugin finds a function it thinks needs to be + instrumented. This is useful for comparing coverage between + builds. + config STACKLEAK_TRACK_MIN_SIZE int "Minimum stack frame size of functions tracked by STACKLEAK" default 100 |