Close the temporary file descriptor when create_files() fails after open(), and release the read buffer before returning from the path-length failure branch.
This is logically separable from the #3205 stale-directory fix: it does not change how existing /sd/stress is handled, but keeps the same failure paths from leaking resources while the stress test exits after an error.
The scope intentionally stays within sd_stress failure cleanup and does not touch SD/MMC transfer behavior or other testing drivers.
Signed-off-by: Nightt <87569709+nightt5879@users.noreply.github.com>
f8a48fa5f3