Check for possible overflow when checking for segment overlap. #1087
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Image loader computes the end of the segment, which can overflow 64bit unsigned integer due to the large image base used. I've used simple detection that relies on segment size being limited to 32bit value, and if unsigned overflow happens, it wraps around, and
large 64bit + max 32bit
overflowing will still be smaller than thelarge 64bit
. If overflow is detected, I've clipped the end to the upper bound of the 64bit unsigned integer.