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    SubjectRe: procfs permissions on 2.6.x
    viro@parcelfarce.linux.theplanet.co.uk wrote:
    >
    > On Sat, Jul 03, 2004 at 02:35:58PM -0700, Andrew Morton wrote:
    > > > Because it turns the question what permissions a procfs file has into
    > > > a lottery game. He only changes the incore inode owner and as soon as
    > > > the inode is reclaimed the old ones return.
    > >
    > > procfs inodes aren't reclaimable.
    >
    > WTF do you mean "not reclaimable"?

    Got confused.

    > They do get freed under memory pressure
    > and recreated on later lookups.

    Some do. On my test box 1000-odd /proc inodes get allocated and fully
    freed on each `ls -R /proc'. 65 /proc inodes are freed during `ls -lR
    /proc/net'. So maybe it isn't working completely.

    But proc_notify_change() copies the inode's uid, gid and mode into the
    proc_dir_entry, so they get correctly initialised when the inode is
    reinstantiated, so afaict we have no bug here.
    -
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