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    SubjectRe: 2.6.17-rc3 - fs/namespace.c issue
    Stephen Smalley <sds@tycho.nsa.gov> wrote:
    >
    > On Mon, 2006-05-01 at 14:33 -0700, Andrew Morton wrote:
    > > Valdis.Kletnieks@vt.edu wrote:
    > > >
    > > > There seems to have been a bug introduced in this changeset:
    > > >
    > > > http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f6422f17d3a480f21917a3895e2a46b968f56a08
    > > >
    > > > Am running 2.6.17-rc3-mm1. When this changeset is applied, 'mount --bind'
    > > > misbehaves:
    > > >
    > > > > # mkdir /foo
    > > > > # mount -t tmpfs -o rw,nosuid,nodev,noexec,noatime,nodiratime none /foo
    > > > > # mkdir /foo/bar
    > > > > # mount --bind /foo/bar /foo
    > > > > # tail -2 /proc/mounts
    > > > > none /foo tmpfs rw,nosuid,nodev,noexec,noatime,nodiratime 0 0
    > > > > none /foo tmpfs rw 0 0
    > > >
    > > > Reverting this changeset causes both mounts to have the same options.
    > > >
    > > > (Thanks to Stephen Smalley for tracking down the changeset...)
    > > >
    > >
    > > (cc's added)
    >
    > What's the verdict on this change in user-visible behavior for bind
    > mounts? Is it a legitimate change and userland just needs to adapt to
    > it, or is it a change to the kernel's stable ABI that needs to be
    > reverted? It still appears to be present in -rc4.
    >

    Well. We'd certainly prefer to not change user-visible behaviour without
    excellent reasons - I don't htink any have been given, really.

    AFACIT nobody tested Herbert's 'untested "fix"'. What was the verdict on
    that?
    -
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