• Eric W. Biederman's avatar
    coda: Restrict coda messages to the initial user namespace · d83f5901
    Eric W. Biederman authored
    Remove the slight chance that uids and gids in coda messages will be
    interpreted in the wrong user namespace.
    
    - Only allow processes in the initial user namespace to open the coda
      character device to communicate with coda filesystems.
    - Explicitly convert the uids in the coda header into the initial user
      namespace.
    - In coda_vattr_to_attr make kuids and kgids from the initial user
      namespace uids and gids in struct coda_vattr that just came from
      userspace.
    - In coda_iattr_to_vattr convert kuids and kgids into uids and gids
      in the intial user namespace and store them in struct coda_vattr for
      sending to coda userspace programs.
    
    Nothing needs to be changed with mounts as coda does not support
    being mounted in anything other than the initial user namespace.
    
    Cc: Jan Harkes <jaharkes@cs.cmu.edu>
    Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
    d83f5901
coda_psdev.h 2.62 KB