[PATCH] xfs: avoid double-free in xfs_attr_node_addname

[Ben Myers]

On Wed, Jul 31, 2013 at 08:18:54PM -0500, Eric Sandeen wrote:
> xfs_attr_node_addname()'s error handling tests whether it
> should free "state" in the out: error handling label:
> 
> out:
>         if (state)
>                 xfs_da_state_free(state);
> 
> but an earlier free doesn't set state to NULL afterwards; this
> could lead to a double free.  Fix it by setting state to NULL
> after it's freed.
> 
> This was found by Coverity.
> 
> Signed-off-by: Eric Sandeen <sandeen at redhat.com>

Applied.