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SubjectRe: [PATCH] fortify: Adjust KUnit test for modular build
On Tue, Sep 13, 2022 at 10:31:36AM -0700, Kees Cook wrote:
> A much better "unknown size" string pointer is available directly from
> struct test, so use that instead of a global that isn't shared with
> modules.
>
> Reported-by: Nathan Chancellor <nathan@kernel.org>
> Link: https://lore.kernel.org/lkml/YyCOHOchVuE/E7vS@dev-arch.thelio-3990X
> Fixes: 875bfd5276f3 ("fortify: Add KUnit test for FORTIFY_SOURCE internals")
> Cc: linux-hardening@vger.kernel.org
> Signed-off-by: Kees Cook <keescook@chromium.org>
> ---
> Whoops! Thanks Nathan! :) This fixes it for your reproducer.

Confirmed :)

Build-tested-by: Nathan Chancellor <nathan@kernel.org>

Thanks for the quick fix!

> ---
> lib/fortify_kunit.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/lib/fortify_kunit.c b/lib/fortify_kunit.c
> index 99bc0ea60d27..409af07f340a 100644
> --- a/lib/fortify_kunit.c
> +++ b/lib/fortify_kunit.c
> @@ -17,7 +17,6 @@
>
> #include <kunit/test.h>
> #include <linux/string.h>
> -#include <linux/init.h>
>
> static const char array_of_10[] = "this is 10";
> static const char *ptr_of_11 = "this is 11!";
> @@ -31,7 +30,7 @@ static void known_sizes_test(struct kunit *test)
>
> KUNIT_EXPECT_EQ(test, __compiletime_strlen(array_unknown), SIZE_MAX);
> /* Externally defined and dynamically sized string pointer: */
> - KUNIT_EXPECT_EQ(test, __compiletime_strlen(saved_command_line), SIZE_MAX);
> + KUNIT_EXPECT_EQ(test, __compiletime_strlen(test->name), SIZE_MAX);
> }
>
> /* This is volatile so the optimizer can't perform DCE below. */
> --
> 2.34.1
>

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