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2009.01.22 17:00 "Re: libtiff 4.0.0beta3", by Bob Friesenhahn
On Thu, 22 Jan 2009, Edward Lam wrote: > > I did a pass using the canonical build instructions for MSVC and got > some additional warnings similar to: > > tif_lzw.c(389) : warning C4244: '+=' : conversion from 'tmsize_t' to > 'long', possible loss of data > tif_lzw.c(606) : warning C4244: '+=' : conversion from 'tmsize_t' to > 'long', possible loss of data > tif_lzw.c(715) : warning C4244: '=' : conversion from 'tmsize_t' to > 'long', possible loss of data This type of warning is quite worrysome. For Windows builds, the 'long' type is always 32-bit whereas it is usually 64-bit on Unix systems. Undetected overflow will result in wrong processing, and may represent an available security exploit. Can you post the full list of such warnings? Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/