• Artem Bityutskiy's avatar
    UBIFS: mark unused key objects as invalid · ba2f48f7
    Artem Bityutskiy authored
    When scanning the flash, UBIFS builds a list of flash nodes of type
    'struct ubifs_scan_node'. Each scanned node has a 'snod->key' field. This field
    is valid for most of the nodes, but invalid for some node type, e.g., truncation
    nodes. It is safer to explicitly initialize such keys to something invalid,
    rather than leaving them initialized to all zeros, which has key type of
    UBIFS_INO_KEY.
    
    This patch introduces new "fake" key type UBIFS_INVALID_KEY and initializes
    unused 'snod->key' objects to this type. It also adds debugging assertions in
    the TNC code to make sure no one ever tries to look these nodes up in the TNC.
    Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
    ba2f48f7
scan.c 9.42 KB