CVE-2026-64146

In the Linux kernel, the following vulnerability has been resolved:

erofs: fix metabuf leak in inode xattr initialization

commit bb88e8da0025 ("erofs: use meta buffers for xattr operations")

converted xattr operations to use on-stack erofs_buf instances.

erofs_init_inode_xattrs() uses such a metabuf while reading the inline

xattr header and shared xattr id array.

Some error paths after erofs_read_metabuf() leave through out_unlock

without dropping the metabuf, so the folio reference can leak.

Consolidate the cleanup at out_unlock. erofs_put_metabuf() is a

no-op if no folio has been acquired, and this keeps all paths after

taking EROFS_I_BL_XATTR_BIT covered by a single cleanup site.