[Okular-devel] [Bug 294514] New: Okular stalls with 100% CPU when trying to print/preview a document with filled forms

[Dario Freddi]

https://bugs.kde.org/show_bug.cgi?id=294514

           Summary: Okular stalls with 100% CPU when trying to
                    print/preview a document with filled forms
           Product: okular
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: okular-devel at kde.org
        ReportedBy: drf at kde.org


Version:           unspecified (using KDE 4.8.0) 
OS:                Linux

This bug can be easily reproduced by filling the new eV expense form. When
trying to print or preview print, Okular goes 100% CPU and stalls forever.
Looking at the backtraces, it seems to be related to some issues with poppler
and fonts. This is one of the most easy to find:

#0  0x00007ffff516d6ea in _IO_fread (buf=<optimized out>, size=1,
count=<optimized out>, fp=<optimized out>) at iofread.c:47
#1  0x00007fffe38b26af in FileStream::fillBuf() () from
/usr/lib/libpoppler.so.13
#2  0x00007fffe38b6d0d in FileStream::getChar() () from
/usr/lib/libpoppler.so.13
#3  0x00007fffe38b51a3 in FlateStream::readSome() () from
/usr/lib/libpoppler.so.13
#4  0x00007fffe38b553a in FlateStream::getChars(int, unsigned char*) () from
/usr/lib/libpoppler.so.13
#5  0x00007fffe387ac87 in GfxFont::readEmbFontFile(XRef*, int*) () from
/usr/lib/libpoppler.so.13
#6  0x00007fffe387be2f in Gfx8BitFont::Gfx8BitFont(XRef*, char*, Ref,
GooString*, GfxFontType, Dict*) () from /usr/lib/libpoppler.so.13
#7  0x00007fffe387e1fc in GfxFont::makeFont(XRef*, char*, Ref, Dict*) () from
/usr/lib/libpoppler.so.13
#8  0x00007fffe387e48f in GfxFontDict::GfxFontDict(XRef*, Ref*, Dict*) () from
/usr/lib/libpoppler.so.13
#9  0x00007fffe38ca4ce in PSOutputDev::setupFonts(Dict*) () from
/usr/lib/libpoppler.so.13
#10 0x00007fffe38ca569 in PSOutputDev::setupResources(Dict*) () from
/usr/lib/libpoppler.so.13

Although, all of them seem to originate from "Gfx8BitFont::Gfx8BitFont(XRef*,
char*, Ref, GooString*, GfxFontType, Dict*) () from /usr/lib/libpoppler.so.13"

Reproducible: Didn't try

Steps to Reproduce:
Download http://ev.kde.org/resources/expense-iban.pdf , fill some forms, try to
print it or to preview print.

Actual Results:  
Okular stalls at 100% CPU

Expected Results:  
Prints successfully

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