Created attachment 117146 [details]
poppler-hangs.pdf

Please find enclose a PDF found by fuzzing that make pdftohtml run into an infinity loop.

When I terminate it, the stack is always the same :
#0  0x00007ffff737a090 in __write_nocancel ()
    at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff730e3b5 in _IO_new_file_write (
    f=0x7ffff7634700 <_IO_2_1_stderr_>, data=0x7fffffffa470, n=57)
    at fileops.c:1302
#2  0x00007ffff730d9fc in new_do_write (
    fp=fp@entry=0x7ffff7634700 <_IO_2_1_stderr_>, 
    data=data@entry=0x7fffffffa470 "Syntax Error (291): Illegal character <69> in hex string\n\331\060\367\377\177", to_do=to_do@entry=57) at fileops.c:537
#3  0x00007ffff730ea46 in _IO_new_file_xsputn (
    f=0x7ffff7634700 <_IO_2_1_stderr_>, data=<optimized out>, n=57)
    at fileops.c:1384
#4  0x00007ffff72e3770 in buffered_vfprintf (
    s=0x7ffff7634700 <_IO_2_1_stderr_>, format=<optimized out>, 
    args=<optimized out>) at vfprintf.c:2369
#5  0x00007ffff72de115 in _IO_vfprintf_internal (
    s=s@entry=0x7ffff7634700 <_IO_2_1_stderr_>, 
    format=0x7ffff7b2230a "%s (%lld): %s\n", ap=ap@entry=0x7fffffffca88)
    at vfprintf.c:1296
#6  0x00007ffff7395b1c in ___fprintf_chk (
    fp=0x7ffff7634700 <_IO_2_1_stderr_>, flag=1, format=<optimized out>)
    at fprintf_chk.c:35
#7  0x00007ffff7a44e0d in fprintf (__fmt=0x7ffff7b2230a "%s (%lld): %s\n", 
    __stream=<optimized out>) at /usr/include/bits/stdio2.h:98
#8  error (category=category@entry=errSyntaxError, pos=291, 
    msg=msg@entry=0x7ffff7b32a40 "Illegal character <{0:02x}> in hex string")
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Error.cc:89
#9  0x00007ffff7a9f6af in Lexer::getObj (this=0x64b740, 
    obj=obj@entry=0x64c878, objNum=objNum@entry=-1)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Lexer.cc:506
#10 0x00007ffff7aaa0a5 in Parser::shift (this=this@entry=0x64c850, 
    objNum=objNum@entry=-1)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Parser.cc:300
#11 0x00007ffff7aaa9e0 in Parser::getObj (this=this@entry=0x64c850, 
    obj=obj@entry=0x7fffffffceb0, simpleOnly=simpleOnly@entry=false, 
    fileKey=0x0, encAlgorithm=cryptRC4, keyLength=1146103040, objNum=5, 
    objGen=0, recursion=0, strict=false)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Parser.cc:111
#12 0x00007ffff7ac49b9 in XRef::fetch (this=0x64b040, num=5, 
    gen=<optimized out>, obj=0x7fffffffceb0, recursion=0)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/XRef.cc:1199
#13 0x00007ffff7aa41c5 in Object::fetch (this=<optimized out>, 
    xref=<optimized out>, obj=<optimized out>, recursion=<optimized out>)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Object.cc:122
#14 0x00007ffff7a350b9 in Array::get (this=<optimized out>, i=i@entry=0, 
    obj=obj@entry=0x7fffffffceb0, recursion=recursion@entry=0)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Array.cc:125
#15 0x00007ffff7a39652 in arrayGet (recursion=0, this=0x7fffffffce90, 
    this=0x7fffffffce90, obj=0x7fffffffceb0, i=0)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Object.h:293
#16 Catalog::cachePageTree (this=this@entry=0x64b130, page=page@entry=3715)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Catalog.cc:385
#17 0x00007ffff7a39f0a in Catalog::getPage (this=0x64b130, i=i@entry=3715)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/Catalog.cc:239
#18 0x00007ffff7ab0850 in PDFDoc::getPage (this=this@entry=0x64adb0, 
    page=page@entry=3715)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/PDFDoc.cc:1938
#19 0x00007ffff7ab0922 in PDFDoc::displayPage (this=this@entry=0x64adb0, 
    out=out@entry=0x64bc40, page=page@entry=3715, hDPI=hDPI@entry=108, 
    vDPI=vDPI@entry=108, rotate=rotate@entry=0, 
    useMediaBox=useMediaBox@entry=true, crop=crop@entry=false, 
    printing=false, abortCheckCbk=0x0, abortCheckCbkData=0x0, 
    annotDisplayDecideCbk=0x0, annotDisplayDecideCbkData=0x0, copyXRef=false)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/PDFDoc.cc:466
#20 0x00007ffff7ab0a89 in PDFDoc::displayPages (this=this@entry=0x64adb0, 
    out=out@entry=0x64bc40, firstPage=<optimized out>, lastPage=14600000, 
    hDPI=108, vDPI=108, rotate=rotate@entry=0, 
    useMediaBox=useMediaBox@entry=true, crop=false, printing=false, 
    abortCheckCbk=0x0, abortCheckCbkData=0x0, annotDisplayDecideCbk=0x0, 
    annotDisplayDecideCbkData=0x0)
    at /home/legarrec/info/programmation/tmp/poppler/poppler/PDFDoc.cc:486
#21 0x0000000000409974 in main (argc=2, argv=<optimized out>)
    at /home/legarrec/info/programmation/tmp/poppler/utils/pdftohtml.cc:392