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    SubjectRe: VFS, NFS security bug? Should CAP_MKNOD and CAP_LINUX_IMMUTABLE be added to CAP_FS_MASK?
    On Fri, Mar 13, 2009 at 5:10 AM, Serge E. Hallyn <> wrote:
    > Quoting J. Bruce Fields (
    >> On Wed, Mar 11, 2009 at 03:53:34PM +0300, Igor Zhbanov wrote:
    >> > Hello!
    >> >
    >> > It seems that CAP_MKNOD and CAP_LINUX_IMMUTABLE were forgotten to be
    >> > added to CAP_FS_MASK_B0 in linux-2.6.x and to CAP_FS_MASK in
    >> > linux-2.4.x. Both capabilities affects file system and can be
    >> > considered file system capabilities.
    >> Sounds right to me--I'd expect rootsquash to guarantee that new device
    >> nodes can't be created from the network.  Cc'ing random people from the
    >> git log for include/linux/capability.h in hopes they can help.
    > Yeah it seems reasonable.  If it is, then does that mean that we
    > also need CAP_SYS_ADMIN (to write selinux labels) and CAP_SETFCAP
    > (to set file capabilities) as well?

    If a change is made to CAP_FS_MASK, please do remember to CC, and linux-api@.



    Michael Kerrisk Linux man-pages maintainer; Found a documentation bug?
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