From: Tommi Rantala tommi.t.rantala@nokia.com
[ Upstream commit f825d3f7ed9305e7dd0a3e0a74673a4257d0cc53 ]
Commit 1056d3d2c97e ("selftests: enforce local header dependency in lib.mk") added header dependency to the rule, but as the rule uses $^, the headers are added to the compiler command line.
This can cause unexpected precompiled header files being generated when compilation fails:
$ echo { >> openat2_test.c
$ make gcc -Wall -O2 -g -fsanitize=address -fsanitize=undefined openat2_test.c tools/testing/selftests/kselftest_harness.h tools/testing/selftests/kselftest.h helpers.c -o tools/testing/selftests/openat2/openat2_test openat2_test.c:313:1: error: expected identifier or ‘(’ before ‘{’ token 313 | { | ^ make: *** [../lib.mk:140: tools/testing/selftests/openat2/openat2_test] Error 1
$ file openat2_test* openat2_test: GCC precompiled header (version 014) for C openat2_test.c: C source, ASCII text
Fix it by filtering out the headers, so that we'll only pass the actual *.c files in the compiler command line.
Fixes: 1056d3d2c97e ("selftests: enforce local header dependency in lib.mk") Signed-off-by: Tommi Rantala tommi.t.rantala@nokia.com Acked-by: Kees Cook keescook@chromium.org Reviewed-by: Christian Brauner christian.brauner@ubuntu.com Signed-off-by: Shuah Khan skhan@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/lib.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk index 7a17ea8157367..66f3317dc3654 100644 --- a/tools/testing/selftests/lib.mk +++ b/tools/testing/selftests/lib.mk @@ -137,7 +137,7 @@ endif ifeq ($(OVERRIDE_TARGETS),) LOCAL_HDRS := $(selfdir)/kselftest_harness.h $(selfdir)/kselftest.h $(OUTPUT)/%:%.c $(LOCAL_HDRS) - $(LINK.c) $^ $(LDLIBS) -o $@ + $(LINK.c) $(filter-out $(LOCAL_HDRS),$^) $(LDLIBS) -o $@
$(OUTPUT)/%.o:%.S $(COMPILE.S) $^ -o $@