[PATCH v3] scripts/gcc-plugins: suppress recorded GCC switches for extmod builds
Jaihind Yadav <[email protected]>
| Newsgroups | org.kernel.vger.linux-kbuild,org.kernel.vger.linux-hardening,org.kernel.vger.linux-kernel,org.kernel.vger.linux-modules |
|---|---|
| Message-ID | <[email protected]> |
With GCC plugins enabled, external module builds can record -fplugin=... paths in DWARF producer metadata via -grecord-gcc-switches, leaking host/build specific paths and triggering QA checks. Handle this in scripts/Makefile.gcc-plugins for KBUILD_EXTMOD builds by adding -gno-record-gcc-switches to plugin cflags. This keeps plugin behavior unchanged while avoiding absolute plugin path leakage in external module debug metadata. Suggested-by: Nathan Chancellor <[email protected]> Link: https://lore.kernel.org/all/20260817185146.GC1249844@ax162/ Signed-off-by: Jaihind Yadav <[email protected]> --- scripts/Makefile.gcc-plugins | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins index b0e1423b09c2..9b9899580571 100644 --- a/scripts/Makefile.gcc-plugins +++ b/scripts/Makefile.gcc-plugins @@ -8,6 +8,10 @@ ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY endif export DISABLE_LATENT_ENTROPY_PLUGIN +# Disable recording GCC options in debug info when building external modules to +# avoid leaking absolute host build paths +gcc-plugin-cflags-$(if $(KBUILD_EXTMOD),y) += -gno-record-gcc-switches + # All the plugin CFLAGS are collected here in case a build target needs to # filter them out of the KBUILD_CFLAGS. GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y)) -DGCC_PLUGINS -- 2.43.0