Messages in this thread Patch in this message | | | From | Andrey Ryabinin <> | Subject | [PATCH] kasan: fix build warnings | Date | Wed, 04 Feb 2015 14:43:51 +0300 |
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Some versions of gcc produce warning instead of error when -fsanitize flag uses unsupported argument: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61065
This breaks our detection of whether -fsanitize=kernel-address is supported by compiler or not. Thus we have tons of build warnings like this: x86_64-linux-gcc: warning: unrecognized argument to -fsanitize= option: 'kernel-address'
Passing -Werror into $(call cc-option) will fix this problem as gcc will error out now.
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> ---
Hi Andrew, this patch applies on top kasan patch set. We can't just fix add-kernel-address-sanitizer-infrastructure.patch as patch kasan-enable-instrumentation-of-global-variables.patch depends on it.
Let me know if your prefer to update all needed patches instead of this fix.
scripts/Makefile.kasan | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index df302f8..72a40bb 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -5,15 +5,14 @@ else call_threshold := 0 endif -CFLAGS_KASAN_MINIMAL := $(call cc-option, -fsanitize=kernel-address \ - --param asan-globals=1) +CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address --param asan-globals=1 CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \ -fasan-shadow-offset=$(CONFIG_KASAN_SHADOW_OFFSET) \ --param asan-stack=1 --param asan-globals=1 \ --param asan-instrumentation-with-call-threshold=$(call_threshold)) -ifeq ($(CFLAGS_KASAN_MINIMAL),) +ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) $(warning Cannot use CONFIG_KASAN: \ -fsanitize=kernel-address is not supported by compiler) else -- 2.2.2
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