From 7d78874273463a784759916fc3e0b4e2eb141c70 Mon Sep 17 00:00:00 2001
From: Chris Mason <clm@fb.com>
Date: Wed, 21 May 2014 05:49:54 -0700
Subject: [PATCH] Btrfs: fix double free in find_lock_delalloc_range

We need to NULL the cached_state after freeing it, otherwise
we might free it again if find_delalloc_range doesn't find anything.

Signed-off-by: Chris Mason <clm@fb.com>
cc: stable@vger.kernel.org
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