On Wed, Aug 17, 2016 at 09:58:33PM -0400, Jeff Mahoney wrote:

commit 909c3a22da3 (Btrfs: fix loading of orphan roots leading to BUG_ON)
avoids the BUG_ON but can add an aliased root to the dead_roots list or
leak the root.

Since we've already been loading roots into the radix tree, we should
use it before looking the root up on disk.

Cc: <redacted> # 4.5
Signed-off-by: Jeff Mahoney <redacted>

Reviewed-by: David Sterba <dsterba@suse.com>