On Mon, May 28, 2012 at 01:33:42PM -0400, Theodore Ts'o wrote:

If we rmdir a directory which is a hard link to '.', we will deadlock
trying to grab the directory's i_mutex.  Check for this condition and
return EINVAL, which is what we return if the user attempts to rmdir
"/foo/bar/."

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
 fs/namei.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Any reason why you didn't also tag this for the stable kernel releases?

thanks,

greg k-h