ovl: prevent private clone if bind mount is not allowed

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commit 427215d85e upstream.

Add the following checks from __do_loopback() to clone_private_mount() as
well:

 - verify that the mount is in the current namespace

 - verify that there are no locked children

Reported-by: Alois Wohlschlager <alois1@gmx-topmail.de>
Fixes: c771d683a6 ("vfs: introduce clone_private_mount()")
Cc: <stable@vger.kernel.org> # v3.18
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Miklos Szeredi 2021-08-09 10:19:47 +02:00 • committed by Greg Kroah-Hartman

parent bffead8d36

commit 6a002d48a6

1 changed files with 28 additions and 14 deletions

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42

fs/namespace.c

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