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https://issues.apache.org/jira/browse/PDFBOX-1580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christian Kohlschütter updated PDFBOX-1580:
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Attachment: PDFBOX-1580.patch
The patch.
> Oracle JVM crashes because of embedded fonts.
> ---------------------------------------------
>
> Key: PDFBOX-1580
> URL: https://issues.apache.org/jira/browse/PDFBOX-1580
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.7.0, 1.7.1, 1.8.1
> Environment: Linux 64-bit
> Oracle JRE 6.0_45-b06 or 7.0_21-b11
> Reporter: Christian Kohlschütter
> Priority: Blocker
> Labels: PatchAvailable, Regression
> Attachments: PDFBOX-1580.patch
>
>
> Oracle's closed-source font rendering chokes on some fonts embedded in PDFs
> because their cmap data is either missing or invalid.
> Using OpenJDK, no crashes were observed.
> The JVM crashes right after attempting to draw a glyph vector using
> codepoints, which is called from within PDSimpleFont#drawString.
> Versions of pdfbox prior to 1.7.0 did not crash.
> The crashes look like this:
> JRE 6:
> # JRE version: 6.0_45-b06
> # Java VM: Java HotSpot(TM) 64-Bit Server VM (20.45-b01 mixed mode
> linux-amd64 compressed oops)
> # Problematic frame:
> # C [libfontmanager.so+0x242c8] imaginary long double+0xd8
> JRE 7:
> # JRE version: 7.0_21-b11
> # Java VM: Java HotSpot(TM) 64-Bit Server VM (23.21-b01 mixed mode
> linux-amd64 compressed oops)
> # Problematic frame:
> # C [libt2k.so+0x2e6b1] Compute_cmapClass_GlyphIndex+0x1
> Since older versions of pdfbox did not crash, I tracked the problem down to a
> call to java.awt.Font#canDisplayUpTo(String) that has been moved in 1.7.0
> from the top of PDSimpleFont#drawString down to a branch. Moving the call
> back up prevented the crash.
> It looks like a call to java.awt.Font#canDisplay(int) initializes some
> internal data structures of Oracle's fontmanager, preventing the JVM crash.
> As I have observed this crash only for fonts that have been processed through
> PDType0Font, I have added a fix there, which should save us some cycles and,
> more importantly, should not create new problems.
> Oracle bug reports have been filed for both JRE 6 and 7, including a
> "minimal" test case:
> Oracle JRE 6: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=9002077
> Oracle JRE 7: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=9002078
> There have been a few other bug reports mentioning a similar crash on other
> platforms, older JRE versions, e.g.: PDFBOX-1426, PDFBOX-1336.
> The patch provided here might fix these bugs, too.
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