Pull KUnit fixes from Shuah Khan:
"One single fix to update alloc_string_stream() callers to check for
IS_ERR() instead of NULL to be in sync with alloc_string_stream()
returning an ERR_PTR()"
* tag 'linux-kselftest-kunit-fixes-6.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: update NULL vs IS_ERR() tests