dongshengyuan
4839cb914e
When copying a directory into an image, open an existing destination with O_NOFOLLOW before passing it to copy_tree_at(). This rejects a symlink used as the final destination component without a separate stat-before-use check. Previously the pre-opened destination followed that symlink. That allowed --copy-to to be redirected outside the image root when the image was a directory tree. If the destination does not exist yet, keep delegating creation to copy_tree_at(). Real existing directories still use COPY_MERGE through the opened directory fd. Signed-off-by: dongshengyuan <dongshengyuan@uniontech.com>
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