Xi Wang 76aa542fb9
ceph: fix bounds check in ceph_decode_need and ceph_encode_need ...
Given a large n, the bounds check (*p + n > end) can be bypassed due to
pointer wraparound. A safer check is (n > end - *p).
[elder@dreamhost.com: inverted test and renamed ceph_has_room()]
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Reviewed-by: Alex Elder <elder@dreamhost.com>
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76aa542fb9