On Sat, 20 Dec 2025 at 00:12, Richard Fitzgerald rf@opensource.cirrus.com wrote:

Replace the NULL checks with IS_ERR_OR_NULL() in KUNIT_BINARY_STR_ASSERTION() to prevent the strcmp() faulting if a passed pointer is an ERR_PTR.

Commit 7ece381aa72d4 ("kunit: Protect string comparisons against NULL") added the checks for NULL on both pointers so that asserts would fail, instead of faulting, if either pointer is NULL. But either pointer could hold an ERR_PTR value.

This assumes that the assertion is expecting both strings to be valid, and is asserting the equality of their _content_.

Signed-off-by: Richard Fitzgerald rf@opensource.cirrus.com

This looks good to me, though I do acknowledge the general hate for IS_ERR_OR_NULL()[1], and particularly how it can annoy things like smatch. For an assertion, though, where we're really asserting that both are valid strings which are equal, I think this is okay.

Reviewed-by: David Gow davidgow@google.com

Cheers, -- David

[1]: https://staticthinking.wordpress.com/2022/08/01/mixing-error-pointers-and-nu...

include/kunit/test.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/kunit/test.h b/include/kunit/test.h index 5ec5182b5e57..9cd1594ab697 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -906,7 +906,8 @@ do { \ }; \ \ _KUNIT_SAVE_LOC(test); \

•   if (likely((__left) && (__right) && (strcmp(__left, __right) op 0)))   \
  

•   if (likely(!IS_ERR_OR_NULL(__left) && !IS_ERR_OR_NULL(__right) &&      \
  

•       (strcmp(__left, __right) op 0)))                                   \
            break;                                                         \
                                                                           \
                                                                           \
  

-- 2.47.3