See each patches for details.

Hu Tao (3):
  qcow2: remove n_start and n_end of qcow2_alloc_cluster_offset()
  qcow2: fix offset overflow
  qcow2: check for NULL l2meta

 block/qcow2-cluster.c  | 14 ++++++--------
 block/qcow2-refcount.c |  7 ++++++-
 block/qcow2.c          | 20 +++++++++++---------
 block/qcow2.h          |  2 +-
 trace-events           |  2 +-
 5 files changed, 25 insertions(+), 20 deletions(-)

-- 
1.7.11.7


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