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fortify: Adjust KUnit test for modular build 

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: 875bfd5276 ("fortify: Add KUnit test for FORTIFY_SOURCE internals")
Cc: linux-hardening@vger.kernel.org
Build-tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2022-09-13 10:28:56 -07:00
parent c5783af354
commit 06c1c49d0c
1 changed files with 1 additions and 2 deletions
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3
lib/fortify_kunit.c
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@ -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. */