Ref: http://seclists.org/oss-sec/2017/q2/2
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# podofotxtextract $FILE
==20388==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x7f08c6a3c3de bp 0x7ffd52235bd0 sp 
0x7ffd52235b20 T0)
==20388==The signal is caused by a READ memory access.
==20388==Hint: address points to the zero page.
    #0 0x7f08c6a3c3dd in PoDoFo::PdfFontFactory::CreateFont(FT_LibraryRec_**,
PoDoFo::PdfObject*) 
/tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/src/doc/PdfFontFactory.cpp:200:88
    #1 0x7f08c6a1028d in PoDoFo::PdfFontCache::GetFont(PoDoFo::PdfObject*) 
/tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/src/doc/PdfFontCache.cpp:362:22
    #2 0x51debb in TextExtractor::ExtractText(PoDoFo::PdfMemDocument*,
PoDoFo::PdfPage*) 
/tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofotxtextract/TextExtractor.cpp:104:43
    #3 0x51d021 in TextExtractor::Init(char const*) 
/tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofotxtextract/TextExtractor.cpp:48:15
    #4 0x539f6d in main 
/tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/tools/podofotxtextract/podofotxtextract.cpp:52:17
    #5 0x7f08c4c9a6ff in __libc_start_main 
/tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289
    #6 0x420d48 in _start (/usr/bin/podofotxtextract+0x420d48)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/tmp/portage/app-text/podofo-0.9.5/work/podofo-0.9.5/src/doc/PdfFontFactory.cpp:200:88 
in PoDoFo::PdfFontFactory::CreateFont(FT_LibraryRec_**, 
PoDoFo::PdfObject*)


Reproducer:
https://github.com/asarubbo/poc/blob/master/00251-podofo-nullptr3

CVE: CVE-2017-7382
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