Re: [REVIEW][PATCH 1/4] vfs: Don't allow overwriting mounts in thecurrent mount namespace

From: Christoph Hellwig
Date: Sat Nov 09 2013 - 03:50:01 EST


On Fri, Nov 08, 2013 at 02:17:31PM -0800, Eric W. Biederman wrote:
> > Read what you've written a few lines above. The part about target->i_mutex
> > being held.
>
> That works for the rename as unlink case but we don't hold
> old_dentry->d_inode->i_mutex which is what is needed to prevent a mount
> on the dentry we are renaming.

It will be held in 3.13.

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