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| author | Kristina Martsenko <kristina.martsenko@arm.com> | 2022-12-09 18:34:41 +0100 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-12-15 01:05:09 +0100 |
| commit | f68022ae0aeb0803450e05abc0e984027c33ef1b (patch) | |
| tree | a81e2da4f4a3a084029bbc12b96112c39c47d1ae /kernel/Makefile | |
| parent | docs: Fix path paste-o for /sys/kernel/warn_count (diff) | |
| download | linux-f68022ae0aeb0803450e05abc0e984027c33ef1b.tar.xz linux-f68022ae0aeb0803450e05abc0e984027c33ef1b.zip | |
lkdtm: cfi: Make PAC test work with GCC 7 and 8
The CFI test uses the branch-protection=none compiler attribute to
disable PAC return address protection on a function. While newer GCC
versions support this attribute, older versions (GCC 7 and 8) instead
supported the sign-return-address=none attribute, leading to a build
failure when the test is built with older compilers. Fix it by checking
which attribute is supported and using the correct one.
Fixes: 2e53b877dc12 ("lkdtm: Add CFI_BACKWARD to test ROP mitigations")
Reported-by: Daniel Díaz <daniel.diaz@linaro.org>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/all/CAEUSe78kDPxQmQqCWW-_9LCgJDFhAeMoVBFnX9QLx18Z4uT4VQ@mail.gmail.com/
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