[LTP] landlock: fix make check warnings/errors

[linuxtestproject.agent@gmail.com]

Hi Andrea,

On Mon, 06 Jul 2026, Andrea Cervesato wrote:
> landlock: fix make check warnings/errors

> -			if (strstr(readdir_files[i], de->d_name) != NULL)
> +			if (!strstr(readdir_files[i], de->d_name))
>  				files_counted++;

This inverts the condition. The original incremented files_counted when
de->d_name was found in readdir_files[i]. The patched version increments
it when de->d_name is NOT found.

Removing the redundant != NULL comparison should produce:

    if (strstr(readdir_files[i], de->d_name))
        files_counted++;

With the ! prefix the count tracks non-matches instead of matches, so
TST_EXP_EQ_LI(files_counted, ARRAY_SIZE(readdir_files)) at the end of
_test_readdir() will produce wrong results.

Verdict - Needs revision

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