Bug 690541 - overflow in tranformation from fixed point formats 26.6 to 24.8
Summary: overflow in tranformation from fixed point formats 26.6 to 24.8
Status: CONFIRMED
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: Graphics Library (show other bugs)
Version: master
Hardware: Macintosh MacOS X
: P4 normal
Assignee: Chris Liddell (chrisl)
URL:
Keywords:
: 690460 (view as bug list)
Depends on:
Blocks:
 
Reported: 2009-06-16 07:16 UTC by Henry Stiles
Modified: 2021-02-14 17:18 UTC (History)
3 users (show)

See Also:
Customer:
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Attachments
c310.bin.asm (185 bytes, application/octet-stream)
2009-06-16 07:20 UTC, Henry Stiles 		Details
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Description Henry Stiles 2009-06-16 07:16:04 UTC 
using the attachment and running pcl6 with any device at 600 dpi, put a
conditional (x < 0) breakpoint on gx_path_add_line_points.  Two stack frames up
the argument was converted from 26.6 to float, one stack frame up the float is
converted to 24.8 and overflows.  The problem is systemic, I don't see any range
checking when changing fixed point formats.
Comment 1 Henry Stiles 2009-06-16 07:20:22 UTC 
Created attachment 5114 [details]
c310.bin.asm
Comment 2 Henry Stiles 2009-06-16 07:33:13 UTC 
*** Bug 690460 has been marked as a duplicate of this bug. ***
Comment 3 Henry Stiles 2009-06-17 10:19:30 UTC 
this bug is masked by rev 9798.
Comment 4 Ken Sharp 2010-09-08 13:48:50 UTC 
Passing this one to Chris for future consideration, especially in light of moving to FreeType for PCL & XPS as well as PostScript/PDF.
Comment 5 Peter Cherepanov 2021-02-14 17:18:50 UTC 
No files in the ghostpdl directory currently contain the string  "gx_path_add_line_points". It is not clear how to reproduce this bug report.