Re: [PATCH 6/9] net: test: Fix printf format specifier in skb_segment kunit test

Guenter Roeck
2024-02-21T13:26:17Z

On Wed, Feb 21, 2024 at 05:27:19PM +0800, David Gow wrote:
> KUNIT_FAIL() accepts a printf-style format string, but previously did
> not let gcc validate it with the __printf() attribute. The use of %lld
> for the result of PTR_ERR() is not correct.
>
> Instead, use %pe and pass the actual error pointer. printk() will format
> it correctly (and give a symbolic name rather than a number if
> available, which should make the output more readable, too).
>
> Fixes: b3098d32ed6e ("net: add skb_segment kunit test")
> Signed-off-by: David Gow <davidgow@google.com>

Tested-by: Guenter Roeck <linux@roeck-us.net>

> ---
> net/core/gso_test.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/core/gso_test.c b/net/core/gso_test.c
> index 4c2e77bd12f4..358c44680d91 100644
> --- a/net/core/gso_test.c
> +++ b/net/core/gso_test.c
> @@ -225,7 +225,7 @@ static void gso_test_func(struct kunit *test)
>
> segs = skb_segment(skb, features);
> if (IS_ERR(segs)) {
> - KUNIT_FAIL(test, "segs error %lld", PTR_ERR(segs));
> + KUNIT_FAIL(test, "segs error %pe", segs);
> goto free_gso_skb;
> } else if (!segs) {
> KUNIT_FAIL(test, "no segments");
> --
> 2.44.0.rc0.258.g7320e95886-goog
>