Constant XATTR_SECURITY_SELINUX 

pub const XATTR_SECURITY_SELINUX: &str = "security.selinux";

The SELinux security context extended attribute name.

This xattr stores the SELinux label for a file (e.g., system_u:object_r:bin_t:s0). When reading from mounted filesystems, this xattr often contains build-host labels that should be stripped or regenerated based on the target system’s policy.