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2000.03.17 16:51 "Re: Some CCITT Group 3 TIFFs crash libtiff", by Jason Summers
Helge Blischke wrote: > > Jason Summers wrote: > > > > I've encountered several CCITT Group 3-compressed TIFF images that cause > > programs compiled with libtiff 3.5.4 to crash with an IPF/segmentation > > fault. > > The files are corrupt. I agree that they are not completely valid. (Aside: However, it's difficult to convince end users of this, since most image viewers display these files without even a warning, and the image appears correct to the naked eye.) I've been assuming that libtiff should not crash when it encounters an invalid file. Right? > Here an error log from tiffcp (from the 3.4beta37 > distribution): ... > RowsPerStrip (278) LONG (4) 1<4294967295> <--- where does this bogus > value come from? Beats me. I didn't create the files; they were sent to me by two unrelated persons. But I'd have to guess that it comes from: > Software (305) ASCII (2) 28<HylaFAX (tm) Version 4.0pl2\000> It's conceivable that something else subsequently corrupted them, but I doubt it. -- Jason Summers jason@med-web.com http://home.mieweb.com/jason/