Re: [RFC][PATCH] rbind across namespaces

[Miklos Szeredi]

> I have enclosed a patch that allows rbinds across any two namespaces.
> NOTE: currenly bind from foriegn namespace to current namespace is
> allowed. This patch now allows:

Note: you are accessing ->mnt_namespace without holding vfsmount_lock.

Also why check current->namespace?  It doesn't hurt to do
get_namespace() even if it's not strictly needed.  And it would
simplify the code.

In fact all uses of current->namespace and check_mnt() could be
eliminated from namespace.c.  The only use of ->namespace would be in
copy_namespace() and exit_namespace().

Miklos
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