• Tahsin Erdogan's avatar
    ext4: strong binding of xattr inode references · b9fc761e
    Tahsin Erdogan authored
    To verify that a xattr entry is not pointing to the wrong xattr inode,
    we currently check that the target inode has EXT4_EA_INODE_FL flag set and
    also the entry size matches the target inode size.
    
    For stronger validation, also incorporate crc32c hash of the value into
    the e_hash field. This is done regardless of whether the entry lives in
    the inode body or external attribute block.
    Signed-off-by: default avatarTahsin Erdogan <tahsin@google.com>
    Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
    b9fc761e
xattr.c 78.8 KB