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| author | Kees Cook <keescook@chromium.org> | 2018-02-06 15:37:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-06 18:32:44 -0800 |
| commit | 2b8383927525d6281cbad1cc70a83d2319eeae47 (patch) | |
| tree | 58b14630915e20fe2f5794d9fe67837027a58436 | |
| parent | 4bf8ba811ac1102d7de6f73af3b9f323463e16c0 (diff) | |
| download | linux-2b8383927525d6281cbad1cc70a83d2319eeae47.tar.gz | |
Makefile: move stack-protector compiler breakage test earlier
In order to make stack-protector failures warn instead of unconditionally breaking the build, this moves the compiler output sanity-check earlier, and sets a flag for later testing. Future patches can choose to warn or fail, depending on the flag value. Link: http://lkml.kernel.org/r/1510076320-69931-2-git-send-email-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Tested-by: Laura Abbott <labbott@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Makefile | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/Makefile b/Makefile index 0d49ff4022fb..20b1aa928d78 100644 --- a/Makefile +++ b/Makefile @@ -696,6 +696,12 @@ endif ifdef CONFIG_CC_STACKPROTECTOR stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh stackp-check := $(wildcard $(stackp-path)) + # If the wildcard test matches a test script, run it to check functionality. + ifdef stackp-check + ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) + stackp-broken := y + endif + endif endif KBUILD_CFLAGS += $(stackp-flag) @@ -1098,11 +1104,9 @@ ifdef stackp-name endif endif # Make sure compiler does not have buggy stack-protector support. -ifdef stackp-check - ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y) +ifdef stackp-broken @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \ $(stackp-flag) available but compiler is broken >&2 && exit 1 - endif endif @: |