From: Josef Bacik <jbacik@fusionio.com>
Date: Mon, 15 Jul 2013 16:41:42 +0000 (-0400)
Subject: Btrfs: fix lock leak when resuming snapshot deletion
X-Git-Tag: v3.2.50~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f9b000a7bb45c8cbd2d380f7716b8ef90f1ac68a;p=pandora-kernel.git

Btrfs: fix lock leak when resuming snapshot deletion

commit fec386ac1428f9c0e672df952cbca5cebd4e4e2f upstream.

We aren't setting path->locks[level] when we resume a snapshot deletion which
means we won't unlock the buffer when we free the path.  This causes deadlocks
if we happen to re-allocate the block before we've evicted the extent buffer
from cache.  Thanks,

Reported-by: Alex Lyakas <alex.btrfs@zadarastorage.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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