xfs: detect self referencing btree sibling pointers
[ Upstream commit dc04db2a ] To catch the obvious graph cycle problem and hence potential endless looping. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com> Acked-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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4e96f5ac
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