[Poppler-bugs] [Bug 76387] New: pdftoppm crash

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76387

          Priority: medium
            Bug ID: 76387
          Assignee: poppler-bugs at lists.freedesktop.org
           Summary: pdftoppm crash
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: jam.bambois at gmail.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: utils
           Product: poppler

Created attachment 96089
  --> https://bugs.freedesktop.org/attachment.cgi?id=96089&action=edit
An example .pdf document that causes a pdftoppm crash

pdftoppm 0.24.5 crashes, when processing the attached file with the following
parameters:

  pdftoppm -scale-to-x 768 -scale-to-y 992 crash.pdf crash

When compiled with DEBUG_MEM enabled, the following error message is shown:

  Overwrite past end of block xxx at address yyy

The .pdf contains a single image of size 67x1 within a Form XObject. The crash
occurs only for certain -scale-to-x and -scale-to-y values. Presumably, for
such scalings, the amount of memory allocated is incorrect.

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