[lkml]   [2009]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    Subjectunprivileged mounts vs. rmdir (was: VFS, NFS security bug? ...)
    [CCs trimmed]

    On Mon, 16 Mar 2009, Serge E. Hallyn wrote:
    > Quoting J. Bruce Fields (
    > > special privilege, so don't consult filesystem permissions (do I have
    > > that right? What happened to the attempt to allow ordinary users to
    > > mount?).
    > Well, they keep getting stalled because we don't have a good answer for
    > what to do about the fact that an unprivileged user can make trees
    > undeletable by pinning them with mounts. (Miklos and Eric cc'd in case
    > I didn't explain that well enough).

    That's correct.

    The best answer I can come up with is to allow rmdir/unlink to
    automatically umount trees from their respective dentries. Obviously
    this can't be done for regular (privileged) mounts, which must keep
    returning EBUSY in such situations.

    But for unprivileged mounts I can't see any fundamental issue with
    such an approach.

    Does anyone see a problem with this? Is there a better solution?


     \ /
      Last update: 2009-03-23 14:25    [W:0.020 / U:2.016 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site