Hi Shuah,
Care to take this through your tree?
On Wed, 18 Dec 2024 17:03:18 +0000
Vincent Donnefort <vdonnefort@xxxxxxxxxx> wrote:
> Extend the ring-buffer mapping test coverage by checking an out-of-bound
> pgoff which has proven to be problematic in the past.
>
> Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
> Cc: linux-kselftest@xxxxxxxxxxxxxxx
> Signed-off-by: Vincent Donnefort <vdonnefort@xxxxxxxxxx>
>
> diff --git a/tools/testing/selftests/ring-buffer/map_test.c b/tools/testing/selftests/ring-buffer/map_test.c
> index d10a847130fb..a58f520f2f41 100644
> --- a/tools/testing/selftests/ring-buffer/map_test.c
> +++ b/tools/testing/selftests/ring-buffer/map_test.c
> @@ -233,12 +233,18 @@ TEST_F(map, data_mmap)
> ASSERT_NE(data, MAP_FAILED);
> munmap(data, data_len);
>
> - /* Overflow the available subbufs by 1 */
> + /* Offset within ring-buffer bounds, mapping size overflow */
> meta_len += desc->meta->subbuf_size * 2;
> data = mmap(NULL, data_len, PROT_READ, MAP_SHARED,
> desc->cpu_fd, meta_len);
> ASSERT_EQ(data, MAP_FAILED);
>
> + /* Offset outside ring-buffer bounds */
> + data_len = desc->meta->subbuf_size * desc->meta->nr_subbufs;
> + data = mmap(NULL, data_len, PROT_READ, MAP_SHARED,
> + desc->cpu_fd, data_len + (desc->meta->subbuf_size * 2));
> + ASSERT_EQ(data, MAP_FAILED);
> +
> /* Verify meta-page padding */
> if (desc->meta->meta_page_size > getpagesize()) {
> data_len = desc->meta->meta_page_size;
>
> base-commit: 61baee2dc5341c936e7fa7b1ca33c5607868de69
You can ignore the above "base-commit" (I don't have it), as it applies
fine to v6.13-rc4.
-- Steve
